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Changes In Branch tip-688 Excluding Merge-Ins

This is equivalent to a diff from d9cb25195d to 12d00c9a0b

2024-04-01
18:36
TIP 688: clock command revision and speedup check-in: 7137ea11e9 user: jan.nijtmans tags: core-8-branch
2024-03-26
17:46
experimental: illustration for lazy clock initialization and auto-load on demand. check-in: b5c0377c7b user: sebres tags: sebres-experimental-tip-688-auto-load
17:37
added missing test coverage for clock ensemble in safe-interpreter (shared from parent interpreter) Closed-Leaf check-in: 12d00c9a0b user: sebres tags: tip-688
2024-03-25
20:22
fixes mem-leak introduced in [06b7ba18bdd9c2c3] (move of configure to unsupported) check-in: c151959ad5 user: sebres tags: tip-688
2024-03-24
17:55
Merge 9.0. Please don't use "register" keyword check-in: 02e9f2e438 user: jan.nijtmans tags: tip-688
16:27
Change Tcl_ExternalToUtfDStringEx and Tcl_UtfToExternalDStringEx to ignore START/END flags as stated... check-in: 4afcab0cc2 user: apnadkarni tags: trunk, main
00:05
A new test constraint, "bigmem", configurable via the environment variable TCL_TESTCONSTRAINT_BIGMEM... check-in: d9cb25195d user: pooryorick tags: trunk, main
2024-03-23
23:34
A new test constraint, "bigmem", configurable via the environment variable TCL_TESTCONSTRAINT_BIGMEM... Closed-Leaf check-in: 6c9845f46a user: pooryorick tags: testconstraint-bigmem
22:32
Merge 8.7 check-in: 86f7c77cc1 user: jan.nijtmans tags: trunk, main

Changes to doc/clock.n.

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1 January 1970, 00:00 UTC.  Note that the count of seconds does not
include any leap seconds; seconds are counted as if each UTC day has
exactly 86400 seconds.  Tcl responds to leap seconds by speeding or
slowing its clock by a tiny fraction for some minutes until it is
back in sync with UTC; its data model does not represent minutes that
have 59 or 61 seconds.
.TP
\fI\-now\fR
Instead of \fItimeVal\fR a non-integer option \fI\-now\fR can be used as
replacement for today, which is simply interpolated to the runt-time as value
of \fBclock seconds\fR. For example:
.sp
\fBclock format -now -f %a; # current day of the week\fR
.sp
\fBclock add -now 1 month; # next month\fR
.TP
\fIunit\fR
.
One of the words, \fBseconds\fR, \fBminutes\fR, \fBhours\fR,
\fBdays\fR, \fBweekdays\fR, \fBweeks\fR, \fBmonths\fR, or \fByears\fR.
Used in conjunction with \fIcount\fR to identify an interval of time,
for example, \fI3 seconds\fR or \fI1 year\fR.
.SS "OPTIONS"
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.PP
The date is determined according to the fields that are present in the
preprocessed format string.  In order of preference:
.IP [1]
If the string contains a \fB%s\fR format group, representing
seconds from the epoch, that group is used to determine the date.
.IP [2]
If the string contains a \fB%J\fR format group, representing
the Julian Day Number, that group is used to determine the date.
If the string contains a \fB%J\fR, \fB%EJ\fR or \fB%Ej\fR format groups,
representing the Calendar or Astronomical Julian Day Number, that groups
are used to determine the date.
Note, that in case of \fB%EJ\fR or \fB%Ej\fR format groups, representing
the Julian Date with time fraction, this groups may be used to determine
the date and time.
.IP [3]
If the string contains a complete set of format groups specifying
century, year, month, and day of month; century, year, and day of year;
or ISO8601 fiscal year, week of year, and day of week; those groups are
combined and used to determine the date.  If more than one complete
set is present, the one at the rightmost position in the string is
used.
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On output, produces the string \fBB.C.E.\fR or \fBC.E.\fR, or a
string of the same meaning in the locale, to indicate whether \fB%Y\fR refers
to years before or after Year 1 of the Common Era.  On input, accepts
the string \fBB.C.E.\fR, \fBB.C.\fR, \fBC.E.\fR, \fBA.D.\fR, or the
abbreviation appropriate to the current locale, and uses it to fix
whether \fB%Y\fR refers to years before or after Year 1 of the
Common Era.
.IP \fB%Ej\fR
On output, produces a string of digits giving the Astronomical Julian Date or
Astronomical Julian Day Number (JDN/JD). In opposite to calendar julian day
\fB%J\fR, it starts the day at noon.
On input, accepts a string of digits (or floating point with the time fraction)
and interprets it as an Astronomical Julian Day Number (JDN/JD).
The Astronomical Julian Date is a count of the number of calendar days
that have elapsed since 1 January, 4713 BCE of the proleptic
Julian calendar, which contains also the time fraktion (after floating point).
The epoch time of 1 January 1970 corresponds to Astronomical JDN 2440587.5.
This value corresponds the julian day used in sqlite-database, and is the same
as result of \fBselect julianday(:seconds, 'unixepoch')\fR.
.IP \fB%EJ\fR
On output, produces a string of digits giving the Calendar Julian Date.
In opposite to julian day \fB%J\fR format group, it produces float number.
In opposite to astronomical julian day \fB%Ej\fR group, it starts at midnight.
On input, accepts a string of digits (or floating point with the time fraction)
and interprets it as a Calendar Julian Day Number.
The Calendar Julian Date is a count of the number of calendar days
that have elapsed since 1 January, 4713 BCE of the proleptic
Julian calendar, which contains also the time fraktion (after floating point).
The epoch time of 1 January 1970 corresponds to Astronomical JDN 2440588.
.IP \fB%Es\fR
This affects similar to \fB%s\fR, but in opposition to \fB%s\fR it parses
or formats local seconds (not the posix seconds).
Because \fB%s\fR has the same precedence as \fB%s\fR (uniquely determines
a point in time), it overrides all other input formats.
.IP \fB%Ex\fR
On output, produces a locale-dependent representation of the date
in the locale's alternative calendar.  On input, matches
whatever \fB%Ex\fR produces.  The locale's alternative calendar need not
be the Gregorian calendar.
.IP \fB%EX\fR
On output, produces a locale-dependent representation of the
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.IP \fB%I\fR
On output, produces a two-digit number giving the hour of the day
(12-11) on a 12-hour clock.  On input, accepts such a number.
.IP \fB%j\fR
On output, produces a three-digit number giving the day of the year
(001-366).  On input, accepts such a number.
.IP \fB%J\fR
On output, produces a string of digits giving the Julian Day Number.
On output, produces a string of digits giving the calendar Julian Day Number.
On input, accepts a string of digits and interprets it as a Julian Day Number.
The Julian Day Number is a count of the number of calendar days
that have elapsed since 1 January, 4713 BCE of the proleptic
Julian calendar.  The epoch time of 1 January 1970 corresponds
to Julian Day Number 2440588.
.IP \fB%k\fR
On output, produces a one- or two-digit number giving the hour of the day
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accepts four digits and may be used to determine calendar date. Note
that \fB%Y\fR does not yield a year appropriate for use with the ISO8601
week number \fB%V\fR; programs should use \fB%G\fR for that purpose.
.IP \fB%z\fR
On output, produces the current time zone, expressed in hours and
minutes east (+hhmm) or west (\-hhmm) of Greenwich. On input, accepts a
time zone specifier (see \fBTIME ZONES\fR below) that will be used to
determine the time zone.
determine the time zone (this token is optionally applicable on input,
so the value is not mandatory and can be missing in input).
.IP \fB%Z\fR
On output, produces the current time zone's name, possibly
translated to the given locale. On input, accepts a time zone
specifier (see \fBTIME ZONES\fR below) that will be used to determine the
time zone (token is also like \fB%z\fR optionally applicable on input).
time zone. This option should, in general, be used on input only when
This option should, in general, be used on input only when
parsing RFC822 dates. Other uses are fraught with ambiguity; for
instance, the string \fBBST\fR may represent British Summer Time or
Brazilian Standard Time. It is recommended that date/time strings for
use by computers use numeric time zones instead.
.IP \fB%%\fR
On output, produces a literal
.QW \fB%\fR
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Using that time as the base, day-of-week specifications are added.
Next, relative specifications are used.  If a date or day is
specified, and no absolute or relative time is given, midnight is
used.  Finally, a correction is applied so that the correct hour of
the day is produced after allowing for daylight savings time
differences and the correct date is given when going from the end
of a long month to a short month.
.PP
The precedence of the applying of single tokens resp. which sequence will be
used by calculating of the time is complex, e. g. heavily dependent on the
precision of type of the token.
.sp
In example below the second date-string contains "next January", therefore
it results in next year but in January. And third date-string besides "January"
contains also additionally "Fri", so it results in the nearest Friday.
Thus both win before "385 days" resp. make it more precise, because of higher
precision of this token types.
.CS
% clock format [clock scan "5 years 18 months 385 days" -base 0 -gmt 1] -gmt 1
Thu Jul 21 00:00:00 GMT 1977
% clock format [clock scan "5 years 18 months 385 days next January" -base 0 -gmt 1] -gmt 1
Sat Jan 21 00:00:00 GMT 1978
% clock format [clock scan "5 years 18 months 385 days next January Fri" -base 0 -gmt 1] -gmt 1
Fri Jan 27 00:00:00 GMT 1978
.CE
.SH "SEE ALSO"
msgcat(n)
.SH KEYWORDS
clock, date, time
.SH "COPYRIGHT"
Copyright \(co 2004 Kevin B. Kenny <[email protected]>. All rights reserved.
'\" Local Variables:
'\" mode: nroff
'\" End:

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/*
 * tclClock.c --
 *
 *	Contains the time and date related commands. This code is derived from
 *	the time and date facilities of TclX, by Mark Diekhans and Karl
 *	Lehenbauer.
 *
 * Copyright © 1991-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright © 1995 Sun Microsystems, Inc.
 * Copyright © 2004 Kevin B. Kenny. All rights reserved.
 * Copyright © 2015 Sergey G. Brester aka sebres. All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclInt.h"
#include "tclTomMath.h"
#include "tclStrIdxTree.h"
#include "tclDate.h"

/*
 * Windows has mktime. The configurators do not check.
 */

#ifdef _WIN32
#define HAVE_MKTIME 1
#endif

/*
 * Constants
 */

#define JULIAN_DAY_POSIX_EPOCH		2440588
#define SECONDS_PER_DAY			86400
#define JULIAN_SEC_POSIX_EPOCH	      (((Tcl_WideInt) JULIAN_DAY_POSIX_EPOCH) \
					* SECONDS_PER_DAY)
#define FOUR_CENTURIES			146097	/* days */
#define JDAY_1_JAN_1_CE_JULIAN		1721424
#define JDAY_1_JAN_1_CE_GREGORIAN	1721426
#define ONE_CENTURY_GREGORIAN		36524	/* days */
#define FOUR_YEARS			1461	/* days */
#define ONE_YEAR			365	/* days */

/*
 * Table of the days in each month, leap and common years
 */

static const int hath[2][12] = {
    {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
    {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static const int daysInPriorMonths[2][13] = {
    {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
    {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
};

/*
 * Enumeration of the string literals used in [clock]
 */

typedef enum ClockLiteral {
    LIT__NIL,
    LIT__DEFAULT_FORMAT,
    LIT_BCE,		LIT_C,
    LIT_CANNOT_USE_GMT_AND_TIMEZONE,
    LIT_CE,
    LIT_DAYOFMONTH,	LIT_DAYOFWEEK,		LIT_DAYOFYEAR,
    LIT_ERA,		LIT_GMT,		LIT_GREGORIAN,
    LIT_INTEGER_VALUE_TOO_LARGE,
    LIT_ISO8601WEEK,	LIT_ISO8601YEAR,
    LIT_JULIANDAY,	LIT_LOCALSECONDS,
    LIT_MONTH,
    LIT_SECONDS,	LIT_TZNAME,		LIT_TZOFFSET,
    LIT_YEAR,
    LIT__END
} ClockLiteral;
CLOCK_LITERAL_ARRAY(Literals);
static const char *const literals[] = {
    "",
    "%a %b %d %H:%M:%S %Z %Y",
    "BCE",		"C",
    "cannot use -gmt and -timezone in same call",
    "CE",
    "dayOfMonth",	"dayOfWeek",		"dayOfYear",
    "era",		":GMT",			"gregorian",
    "integer value too large to represent",
    "iso8601Week",	"iso8601Year",
    "julianDay",	"localSeconds",
    "month",
    "seconds",		"tzName",		"tzOffset",
    "year"
};

/*
 * Structure containing the client data for [clock]
 */

/* Msgcat literals for exact match (mcKey) */
typedef struct {
    size_t refCount;		/* Number of live references. */
    Tcl_Obj **literals;		/* Pool of object literals. */
CLOCK_LOCALE_LITERAL_ARRAY(MsgCtLiterals, "");
} ClockClientData;

/* Msgcat index literals prefixed with _IDX_, used for quick dictionary search */
/*
 * Structure containing the fields used in [clock format] and [clock scan]
 */
CLOCK_LOCALE_LITERAL_ARRAY(MsgCtLitIdxs, "_IDX_");

typedef struct {
    Tcl_WideInt seconds;	/* Time expressed in seconds from the Posix
				 * epoch */
    Tcl_WideInt localSeconds;	/* Local time expressed in nominal seconds
				 * from the Posix epoch */
    int tzOffset;		/* Time zone offset in seconds east of
				 * Greenwich */
    Tcl_Obj *tzName;		/* Time zone name */
    int julianDay;		/* Julian Day Number in local time zone */
    int isBce;			/* 1 if BCE */
    int gregorian;		/* Flag == 1 if the date is Gregorian */
    int year;			/* Year of the era */
    int dayOfYear;		/* Day of the year (1 January == 1) */
    int month;			/* Month number */
    int dayOfMonth;		/* Day of the month */
    int iso8601Year;		/* ISO8601 week-based year */
    int iso8601Week;		/* ISO8601 week number */
    int dayOfWeek;		/* Day of the week */
} TclDateFields;
static const char *const eras[] = { "CE", "BCE", NULL };

/*
 * Thread specific data block holding a 'struct tm' for the 'gmtime' and
 * 'localtime' library calls.
 */

static Tcl_ThreadDataKey tmKey;

/*
 * Mutex protecting 'gmtime', 'localtime' and 'mktime' calls and the statics
 * in the date parsing code.
 */

TCL_DECLARE_MUTEX(clockMutex)

/*
 * Function prototypes for local procedures in this file:
 */

static int		ConvertUTCToLocal(Tcl_Interp *,
			    TclDateFields *, Tcl_Obj *, int);
static int		ConvertUTCToLocalUsingTable(Tcl_Interp *,
			    TclDateFields *, Tcl_Size, Tcl_Obj *const[]);
			    TclDateFields *, Tcl_Size, Tcl_Obj *const[],
			    Tcl_WideInt *rangesVal);
static int		ConvertUTCToLocalUsingC(Tcl_Interp *,
			    TclDateFields *, int);
static int		ConvertLocalToUTC(Tcl_Interp *,
			    TclDateFields *, Tcl_Obj *, int);
static int		ConvertLocalToUTC(void *clientData, Tcl_Interp *,
			    TclDateFields *, Tcl_Obj *timezoneObj, int);
static int		ConvertLocalToUTCUsingTable(Tcl_Interp *,
			    TclDateFields *, Tcl_Size, Tcl_Obj *const[]);
			    TclDateFields *, int, Tcl_Obj *const[],
			    Tcl_WideInt *rangesVal);
static int		ConvertLocalToUTCUsingC(Tcl_Interp *,
			    TclDateFields *, int);
static Tcl_Obj *	LookupLastTransition(Tcl_Interp *, Tcl_WideInt,
			    Tcl_Size, Tcl_Obj *const *);
static int		ClockConfigureObjCmd(void *clientData,
			    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]);
static void		GetYearWeekDay(TclDateFields *, int);
static void		GetGregorianEraYearDay(TclDateFields *, int);
static void		GetMonthDay(TclDateFields *);
static void		GetJulianDayFromEraYearWeekDay(TclDateFields *, int);
static void		GetJulianDayFromEraYearMonthDay(TclDateFields *, int);
static int		IsGregorianLeapYear(TclDateFields *);
static Tcl_WideInt	WeekdayOnOrBefore(int, Tcl_WideInt);
static Tcl_ObjCmdProc ClockClicksObjCmd;
static Tcl_ObjCmdProc ClockConvertlocaltoutcObjCmd;

static int		ClockGetDateFields(void *clientData,
			    Tcl_Interp *interp, TclDateFields *fields,
			    Tcl_Obj *timezoneObj, int changeover);
static Tcl_ObjCmdProc ClockGetdatefieldsObjCmd;
static Tcl_ObjCmdProc ClockGetjuliandayfromerayearmonthdayObjCmd;
static Tcl_ObjCmdProc ClockGetjuliandayfromerayearweekdayObjCmd;
static Tcl_ObjCmdProc ClockGetenvObjCmd;
static Tcl_ObjCmdProc ClockMicrosecondsObjCmd;
static Tcl_ObjCmdProc ClockMillisecondsObjCmd;
static Tcl_ObjCmdProc ClockSecondsObjCmd;
static Tcl_ObjCmdProc ClockFormatObjCmd;
static Tcl_ObjCmdProc ClockParseformatargsObjCmd;
static Tcl_ObjCmdProc ClockSecondsObjCmd;
static Tcl_ObjCmdProc ClockScanObjCmd;
static int		ClockScanCommit(
			    DateInfo *info,
			    ClockFmtScnCmdArgs *opts);
static int		ClockFreeScan(
			    DateInfo *info,
			    Tcl_Obj *strObj, ClockFmtScnCmdArgs *opts);
static int		ClockCalcRelTime(
			    DateInfo *info);
static Tcl_ObjCmdProc ClockAddObjCmd;
static int		ClockValidDate(
			    DateInfo *,
			    ClockFmtScnCmdArgs *, int stage);
static struct tm *	ThreadSafeLocalTime(const time_t *);
static void		TzsetIfNecessary(void);
static size_t		TzsetIfNecessary(void);
static void		ClockDeleteCmdProc(void *);

static Tcl_ObjCmdProc ClockSafeCatchCmd;
/*
 * Structure containing description of "native" clock commands to create.
 */

struct ClockCommand {
    const char *name;		/* The tail of the command name. The full name
				 * is "::tcl::clock::<name>". When NULL marks
				 * the end of the table. */
    Tcl_ObjCmdProc *objCmdProc;	/* Function that implements the command. This
    Tcl_ObjCmdProc *objCmdProc; /* Function that implements the command. This
				 * will always have the ClockClientData sent
				 * to it, but may well ignore this data. */
    CompileProc *compileProc;	/* The compiler for the command. */
    void *clientData;	/* Any clientData to give the command (if NULL
    				 * a reference to ClockClientData will be sent) */
};

static const struct ClockCommand clockCommands[] = {
    {"add",		ClockAddObjCmd,		TclCompileBasicMin1ArgCmd, NULL},
    {"clicks",		ClockClicksObjCmd,	TclCompileClockClicksCmd,  NULL},
    {"format",		ClockFormatObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
    {"getenv",			ClockGetenvObjCmd},
    {"Oldscan",		TclClockOldscanObjCmd},
    {"ConvertLocalToUTC",	ClockConvertlocaltoutcObjCmd},
    {"GetDateFields",		ClockGetdatefieldsObjCmd},
    {"getenv",		ClockGetenvObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
    {"microseconds",	ClockMicrosecondsObjCmd,TclCompileClockReadingCmd, INT2PTR(1)},
    {"milliseconds",	ClockMillisecondsObjCmd,TclCompileClockReadingCmd, INT2PTR(2)},
    {"scan",		ClockScanObjCmd,	TclCompileBasicMin1ArgCmd, NULL},
    {"seconds",		ClockSecondsObjCmd,	TclCompileClockReadingCmd, INT2PTR(3)},
    {"ConvertLocalToUTC", ClockConvertlocaltoutcObjCmd,		NULL, NULL},
    {"GetDateFields",	  ClockGetdatefieldsObjCmd,		NULL, NULL},
    {"GetJulianDayFromEraYearMonthDay",
		ClockGetjuliandayfromerayearmonthdayObjCmd},
		ClockGetjuliandayfromerayearmonthdayObjCmd,	NULL, NULL},
    {"GetJulianDayFromEraYearWeekDay",
		ClockGetjuliandayfromerayearweekdayObjCmd},
		ClockGetjuliandayfromerayearweekdayObjCmd,	NULL, NULL},
    {"ParseFormatArgs",	ClockParseformatargsObjCmd},
    {NULL, NULL}
    {"catch",		ClockSafeCatchCmd,	TclCompileBasicMin1ArgCmd, NULL},
    {NULL, NULL, NULL, NULL}
};

/*
 *----------------------------------------------------------------------
 *
 * TclClockInit --
 *
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-
+



-
+







TclClockInit(
    Tcl_Interp *interp)		/* Tcl interpreter */
{
    const struct ClockCommand *clockCmdPtr;
    char cmdName[50];		/* Buffer large enough to hold the string
				 *::tcl::clock::GetJulianDayFromEraYearMonthDay
				 * plus a terminating NUL. */
    Command         *cmdPtr;
    ClockClientData *data;
    int i;

    /* Structure of the 'clock' ensemble */

    static const EnsembleImplMap clockImplMap[] = {
	{"add",          NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL,       0},
	{"clicks",       ClockClicksObjCmd,       TclCompileClockClicksCmd,  NULL, NULL,       0},
	{"format",       NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL,       0},
	{"microseconds", ClockMicrosecondsObjCmd, TclCompileClockReadingCmd, NULL, INT2PTR(1), 0},
	{"milliseconds", ClockMillisecondsObjCmd, TclCompileClockReadingCmd, NULL, INT2PTR(2), 0},
	{"scan",         NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL      , 0},
	{"seconds",      ClockSecondsObjCmd,      TclCompileClockReadingCmd, NULL, INT2PTR(3), 0},
	{NULL,           NULL,                    NULL,                      NULL, NULL,       0}
    };

    /*
     * Safe interps get [::clock] as alias to a parent, so do not need their
     * own copies of the support routines.
     */

    if (Tcl_IsSafe(interp)) {
	return;
    }

    /*
     * Create the client data, which is a refcounted literal pool.
     */

    data = (ClockClientData *)Tcl_Alloc(sizeof(ClockClientData));
    data->refCount = 0;
    data->literals = (Tcl_Obj **)Tcl_Alloc(LIT__END * sizeof(Tcl_Obj*));
    for (i = 0; i < LIT__END; ++i) {
	TclInitObjRef(data->literals[i], Tcl_NewStringObj(Literals[i], -1));
    }
    data->mcLiterals = NULL;
    data->mcLitIdxs = NULL;
    data->mcDicts = NULL;
    data->lastTZEpoch = 0;
    data->currentYearCentury = ClockDefaultYearCentury;
    data->yearOfCenturySwitch = ClockDefaultCenturySwitch;
    data->validMinYear = INT_MIN;
    data->validMaxYear = INT_MAX;
    /* corresponds max of JDN in sqlite - 9999-12-31 23:59:59 per default */
    data->maxJDN = 5373484.499999994;
	data->literals[i] = Tcl_NewStringObj(literals[i], -1);
	Tcl_IncrRefCount(data->literals[i]);
    }

    data->systemTimeZone = NULL;
    data->systemSetupTZData = NULL;
    data->gmtSetupTimeZoneUnnorm = NULL;
    data->gmtSetupTimeZone = NULL;
    data->gmtSetupTZData = NULL;
    data->gmtTZName = NULL;
    data->lastSetupTimeZoneUnnorm = NULL;
    data->lastSetupTimeZone = NULL;
    data->lastSetupTZData = NULL;
    data->prevSetupTimeZoneUnnorm = NULL;
    data->prevSetupTimeZone = NULL;
    data->prevSetupTZData = NULL;

    data->defaultLocale = NULL;
    data->defaultLocaleDict = NULL;
    data->currentLocale = NULL;
    data->currentLocaleDict = NULL;
    data->lastUsedLocaleUnnorm = NULL;
    data->lastUsedLocale = NULL;
    data->lastUsedLocaleDict = NULL;
    data->prevUsedLocaleUnnorm = NULL;
    data->prevUsedLocale = NULL;
    data->prevUsedLocaleDict = NULL;

    data->lastBase.timezoneObj = NULL;

    memset(&data->lastTZOffsCache, 0, sizeof(data->lastTZOffsCache));

    data->defFlags = 0;

    /*
     * Install the commands.
     * TODO - Let Tcl_MakeEnsemble do this?
     */

#define TCL_CLOCK_PREFIX_LEN 14 /* == strlen("::tcl::clock::") */
    memcpy(cmdName, "::tcl::clock::", TCL_CLOCK_PREFIX_LEN);
    for (clockCmdPtr=clockCommands ; clockCmdPtr->name!=NULL ; clockCmdPtr++) {
    	void *clientData;

	strcpy(cmdName + TCL_CLOCK_PREFIX_LEN, clockCmdPtr->name);
	if (!(clientData = clockCmdPtr->clientData)) {
	    clientData = data;
	data->refCount++;
	Tcl_CreateObjCommand(interp, cmdName, clockCmdPtr->objCmdProc, data,
		ClockDeleteCmdProc);
	    data->refCount++;
	}
	cmdPtr = (Command *)Tcl_CreateObjCommand(interp, cmdName,
		clockCmdPtr->objCmdProc, clientData,
		clockCmdPtr->clientData ? NULL : ClockDeleteCmdProc);
	cmdPtr->compileProc = clockCmdPtr->compileProc ?
		clockCmdPtr->compileProc : TclCompileBasicMin0ArgCmd;
    }
    cmdPtr = (Command *)Tcl_CreateObjCommand(interp,
	    "::tcl::unsupported::clock::configure",
	    ClockConfigureObjCmd, data, ClockDeleteCmdProc);
    data->refCount++;
    cmdPtr->compileProc = TclCompileBasicMin0ArgCmd;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockConfigureClear --
 *
 *	Clean up cached resp. run-time storages used in clock commands.
 *
 *	Shared usage for clean-up (ClockDeleteCmdProc) and "configure -clear".
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
ClockConfigureClear(
    ClockClientData *data)
{
    ClockFrmScnClearCaches();

    data->lastTZEpoch = 0;
    TclUnsetObjRef(data->systemTimeZone);
    TclUnsetObjRef(data->systemSetupTZData);
    TclUnsetObjRef(data->gmtSetupTimeZoneUnnorm);
    TclUnsetObjRef(data->gmtSetupTimeZone);
    TclUnsetObjRef(data->gmtSetupTZData);
    TclUnsetObjRef(data->gmtTZName);
    TclUnsetObjRef(data->lastSetupTimeZoneUnnorm);
    TclUnsetObjRef(data->lastSetupTimeZone);
    TclUnsetObjRef(data->lastSetupTZData);
    TclUnsetObjRef(data->prevSetupTimeZoneUnnorm);
    TclUnsetObjRef(data->prevSetupTimeZone);
    TclUnsetObjRef(data->prevSetupTZData);

    TclUnsetObjRef(data->defaultLocale);
    data->defaultLocaleDict = NULL;
    TclUnsetObjRef(data->currentLocale);
    data->currentLocaleDict = NULL;
    TclUnsetObjRef(data->lastUsedLocaleUnnorm);
    TclUnsetObjRef(data->lastUsedLocale);
    data->lastUsedLocaleDict = NULL;
    TclUnsetObjRef(data->prevUsedLocaleUnnorm);
    TclUnsetObjRef(data->prevUsedLocale);
    data->prevUsedLocaleDict = NULL;

    TclUnsetObjRef(data->lastBase.timezoneObj);

    TclUnsetObjRef(data->lastTZOffsCache[0].timezoneObj);
    TclUnsetObjRef(data->lastTZOffsCache[0].tzName);
    TclUnsetObjRef(data->lastTZOffsCache[1].timezoneObj);
    TclUnsetObjRef(data->lastTZOffsCache[1].tzName);

    TclUnsetObjRef(data->mcDicts);
}

/*
 *----------------------------------------------------------------------
 *
 * ClockDeleteCmdProc --
 *
 *	Remove a reference to the clock client data, and clean up memory
 *	when it's all gone.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */
static void
ClockDeleteCmdProc(
    void *clientData)	/* Opaque pointer to the client data */
{
    ClockClientData *data = (ClockClientData *)clientData;
    int i;

    if (data->refCount-- <= 1) {
	for (i = 0; i < LIT__END; ++i) {
	    Tcl_DecrRefCount(data->literals[i]);
	}
	if (data->mcLiterals != NULL) {
	    for (i = 0; i < MCLIT__END; ++i) {
		Tcl_DecrRefCount(data->mcLiterals[i]);
	    }
	    data->mcLiterals = NULL;
	}
	if (data->mcLitIdxs != NULL) {
	    for (i = 0; i < MCLIT__END; ++i) {
		Tcl_DecrRefCount(data->mcLitIdxs[i]);
	    }
	    data->mcLitIdxs = NULL;
	}

	ClockConfigureClear(data);

	Tcl_Free(data->literals);
	Tcl_Free(data);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * SavePrevTimezoneObj --
 *
 *	Used to store previously used/cached time zone (makes it reusable).
 *
 *	This enables faster switch between time zones (e. g. to convert from one to another).
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static inline void
SavePrevTimezoneObj(
    ClockClientData *dataPtr)	/* Client data containing literal pool */
{
    Tcl_Obj *timezoneObj = dataPtr->lastSetupTimeZone;
    if (timezoneObj && timezoneObj != dataPtr->prevSetupTimeZone) {
	TclSetObjRef(dataPtr->prevSetupTimeZoneUnnorm, dataPtr->lastSetupTimeZoneUnnorm);
	TclSetObjRef(dataPtr->prevSetupTimeZone, timezoneObj);
	TclSetObjRef(dataPtr->prevSetupTZData, dataPtr->lastSetupTZData);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * NormTimezoneObj --
 *
 *	Normalizes the timezone object (used for caching puposes).
 *
 *	If already cached time zone could be found, returns this
 *	object (last setup or last used, system (current) or gmt).
 *
 * Results:
 *	Normalized tcl object pointer.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
NormTimezoneObj(
    ClockClientData *dataPtr,	/* Client data containing literal pool */
    Tcl_Obj	*timezoneObj,	/* Name of zone to find */
    int		*loaded)	/* Used to recognized TZ was loaded */
{
    const char *tz;

    *loaded = 1;
    if ( timezoneObj == dataPtr->lastSetupTimeZoneUnnorm
      && dataPtr->lastSetupTimeZone != NULL
    ) {
	return dataPtr->lastSetupTimeZone;
    }
    if ( timezoneObj == dataPtr->prevSetupTimeZoneUnnorm
      && dataPtr->prevSetupTimeZone != NULL
    ) {
    	return dataPtr->prevSetupTimeZone;
    }
    if (timezoneObj == dataPtr->gmtSetupTimeZoneUnnorm
      && dataPtr->gmtSetupTimeZone != NULL
    ) {
	return dataPtr->literals[LIT_GMT];
    }
    if ( timezoneObj == dataPtr->lastSetupTimeZone
      || timezoneObj == dataPtr->prevSetupTimeZone
      || timezoneObj == dataPtr->gmtSetupTimeZone
      || timezoneObj == dataPtr->systemTimeZone
    ) {
	return timezoneObj;
    }

    tz = TclGetString(timezoneObj);
    if (dataPtr->lastSetupTimeZone != NULL &&
	strcmp(tz, TclGetString(dataPtr->lastSetupTimeZone)) == 0
    ) {
	TclSetObjRef(dataPtr->lastSetupTimeZoneUnnorm, timezoneObj);
	return dataPtr->lastSetupTimeZone;
    }
    if (dataPtr->prevSetupTimeZone != NULL &&
	strcmp(tz, TclGetString(dataPtr->prevSetupTimeZone)) == 0
    ) {
	TclSetObjRef(dataPtr->prevSetupTimeZoneUnnorm, timezoneObj);
	return dataPtr->prevSetupTimeZone;
    }
    if (dataPtr->systemTimeZone != NULL &&
	strcmp(tz, TclGetString(dataPtr->systemTimeZone)) == 0
    ) {
	return dataPtr->systemTimeZone;
    }
    if (strcmp(tz, Literals[LIT_GMT]) == 0) {
	TclSetObjRef(dataPtr->gmtSetupTimeZoneUnnorm, timezoneObj);
	if (dataPtr->gmtSetupTimeZone == NULL) {
	    *loaded = 0;
	}
	return dataPtr->literals[LIT_GMT];
    }
    /* unknown/unloaded tz - recache/revalidate later as last-setup if needed */
    *loaded = 0;
    return timezoneObj;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockGetSystemLocale --
 *
 *	Returns system locale.
 *
 *	Executes ::tcl::clock::GetSystemLocale in given interpreter.
 *
 * Results:
 *	Returns system locale tcl object.
 *
 *----------------------------------------------------------------------
 */

static inline Tcl_Obj *
ClockGetSystemLocale(
    ClockClientData *dataPtr,	/* Opaque pointer to literal pool, etc. */
    Tcl_Interp *interp)		/* Tcl interpreter */
{
    if (Tcl_EvalObjv(interp, 1, &dataPtr->literals[LIT_GETSYSTEMLOCALE], 0) != TCL_OK) {
	return NULL;
    }

    return Tcl_GetObjResult(interp);
}
/*
 *----------------------------------------------------------------------
 *
 * ClockGetCurrentLocale --
 *
 *	Returns current locale.
 *
 *	Executes ::tcl::clock::mclocale in given interpreter.
 *
 * Results:
 *	Returns current locale tcl object.
 *
 *----------------------------------------------------------------------
 */

static inline Tcl_Obj *
ClockGetCurrentLocale(
    ClockClientData *dataPtr,	/* Client data containing literal pool */
    Tcl_Interp *interp)		/* Tcl interpreter */
{
    if (Tcl_EvalObjv(interp, 1, &dataPtr->literals[LIT_GETCURRENTLOCALE], 0) != TCL_OK) {
	return NULL;
    }

    TclSetObjRef(dataPtr->currentLocale, Tcl_GetObjResult(interp));
    dataPtr->currentLocaleDict = NULL;
    Tcl_ResetResult(interp);

    return dataPtr->currentLocale;
}

/*
 *----------------------------------------------------------------------
 *
 * SavePrevLocaleObj --
 *
 *	Used to store previously used/cached locale (makes it reusable).
 *
 *	This enables faster switch between locales (e. g. to convert from one to another).
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static inline void
SavePrevLocaleObj(
    ClockClientData *dataPtr)	/* Client data containing literal pool */
{
    Tcl_Obj *localeObj = dataPtr->lastUsedLocale;
    if (localeObj && localeObj != dataPtr->prevUsedLocale) {
	TclSetObjRef(dataPtr->prevUsedLocaleUnnorm, dataPtr->lastUsedLocaleUnnorm);
	TclSetObjRef(dataPtr->prevUsedLocale, localeObj);
	/* mcDicts owns reference to dict */
	dataPtr->prevUsedLocaleDict = dataPtr->lastUsedLocaleDict;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * NormLocaleObj --
 *
 *	Normalizes the locale object (used for caching puposes).
 *
 *	If already cached locale could be found, returns this
 *	object (current, system (OS) or last used locales).
 *
 * Results:
 *	Normalized tcl object pointer.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
NormLocaleObj(
    ClockClientData *dataPtr,	/* Client data containing literal pool */
    Tcl_Interp *interp,		/* Tcl interpreter */
    Tcl_Obj    *localeObj,
    Tcl_Obj   **mcDictObj)
{
    const char *loc, *loc2;
    if ( localeObj == NULL
      || localeObj == dataPtr->literals[LIT_C]
      || localeObj == dataPtr->defaultLocale
    ) {
	*mcDictObj = dataPtr->defaultLocaleDict;
	return dataPtr->defaultLocale ?
		    dataPtr->defaultLocale : dataPtr->literals[LIT_C];
    }
    if ( localeObj == dataPtr->currentLocale
      || localeObj == dataPtr->literals[LIT_CURRENT]
    ) {
	if (dataPtr->currentLocale == NULL) {
	    ClockGetCurrentLocale(dataPtr, interp);
	}
	*mcDictObj = dataPtr->currentLocaleDict;
	return dataPtr->currentLocale;
    }
    if ( localeObj == dataPtr->lastUsedLocale
      || localeObj == dataPtr->lastUsedLocaleUnnorm
    ) {
	*mcDictObj = dataPtr->lastUsedLocaleDict;
	return dataPtr->lastUsedLocale;
    }
    if ( localeObj == dataPtr->prevUsedLocale
      || localeObj == dataPtr->prevUsedLocaleUnnorm
    ) {
	*mcDictObj = dataPtr->prevUsedLocaleDict;
	return dataPtr->prevUsedLocale;
    }

    loc = TclGetString(localeObj);
    if ( dataPtr->currentLocale != NULL
      && ( localeObj == dataPtr->currentLocale
       || (localeObj->length == dataPtr->currentLocale->length
	  && strcasecmp(loc, TclGetString(dataPtr->currentLocale)) == 0
	)
      )
    ) {
	*mcDictObj = dataPtr->currentLocaleDict;
	return dataPtr->currentLocale;
    }
    if ( dataPtr->lastUsedLocale != NULL
      && ( localeObj == dataPtr->lastUsedLocale
       || (localeObj->length == dataPtr->lastUsedLocale->length
	  && strcasecmp(loc, TclGetString(dataPtr->lastUsedLocale)) == 0
	)
      )
    ) {
	*mcDictObj = dataPtr->lastUsedLocaleDict;
	TclSetObjRef(dataPtr->lastUsedLocaleUnnorm, localeObj);
	return dataPtr->lastUsedLocale;
    }
    if ( dataPtr->prevUsedLocale != NULL
      && ( localeObj == dataPtr->prevUsedLocale
       || (localeObj->length == dataPtr->prevUsedLocale->length
	  && strcasecmp(loc, TclGetString(dataPtr->prevUsedLocale)) == 0
	)
      )
    ) {
	*mcDictObj = dataPtr->prevUsedLocaleDict;
	TclSetObjRef(dataPtr->prevUsedLocaleUnnorm, localeObj);
	return dataPtr->prevUsedLocale;
    }
    if (
	 (localeObj->length == 1 /* C */
	   && strcasecmp(loc, Literals[LIT_C]) == 0)
      || (dataPtr->defaultLocale && (loc2 = TclGetString(dataPtr->defaultLocale))
      	   && localeObj->length == dataPtr->defaultLocale->length
	   && strcasecmp(loc, loc2) == 0)
    ) {
	*mcDictObj = dataPtr->defaultLocaleDict;
	return dataPtr->defaultLocale ?
		    dataPtr->defaultLocale : dataPtr->literals[LIT_C];
    }
    if ( localeObj->length == 7 /* current */
      && strcasecmp(loc, Literals[LIT_CURRENT]) == 0
    ) {
	if (dataPtr->currentLocale == NULL) {
	    ClockGetCurrentLocale(dataPtr, interp);
	}
	*mcDictObj = dataPtr->currentLocaleDict;
	return dataPtr->currentLocale;
    }
    if (
	 (localeObj->length == 6 /* system */
	   && strcasecmp(loc, Literals[LIT_SYSTEM]) == 0)
    ) {
	SavePrevLocaleObj(dataPtr);
	TclSetObjRef(dataPtr->lastUsedLocaleUnnorm, localeObj);
	localeObj = ClockGetSystemLocale(dataPtr, interp);
	TclSetObjRef(dataPtr->lastUsedLocale, localeObj);
	*mcDictObj = NULL;
	return localeObj;
    }
    *mcDictObj = NULL;
    return localeObj;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockMCDict --
 *
 *	Retrieves a localized storage dictionary object for the given
 *	locale object.
 *
 *	This corresponds with call `::tcl::clock::mcget locale`.
 *	Cached representation stored in options (for further access).
 *
 * Results:
 *	Tcl-object contains smart reference to msgcat dictionary.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
ClockMCDict(ClockFmtScnCmdArgs *opts)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    /* if dict not yet retrieved */
    if (opts->mcDictObj == NULL) {

	/* if locale was not yet used */
	if ( !(opts->flags & CLF_LOCALE_USED) ) {

	    opts->localeObj = NormLocaleObj((ClockClientData *)opts->clientData, opts->interp,
		opts->localeObj, &opts->mcDictObj);

	    if (opts->localeObj == NULL) {
		Tcl_SetObjResult(opts->interp,
		    Tcl_NewStringObj("locale not specified and no default locale set", -1));
		Tcl_SetErrorCode(opts->interp, "CLOCK", "badOption", (char *)NULL);
		return NULL;
	    }
	    opts->flags |= CLF_LOCALE_USED;

	    /* check locale literals already available (on demand creation) */
	    if (dataPtr->mcLiterals == NULL) {
		int i;
		dataPtr->mcLiterals = (Tcl_Obj **)Tcl_Alloc(MCLIT__END * sizeof(Tcl_Obj*));
		for (i = 0; i < MCLIT__END; ++i) {
		    TclInitObjRef(dataPtr->mcLiterals[i],
			Tcl_NewStringObj(MsgCtLiterals[i], -1));
		}
	    }
	}

	/* check or obtain mcDictObj (be sure it's modifiable) */
	if (opts->mcDictObj == NULL || opts->mcDictObj->refCount > 1) {
	    int ref = 1;

	    /* first try to find locale catalog dict */
	    if (dataPtr->mcDicts == NULL) {
		TclSetObjRef(dataPtr->mcDicts, Tcl_NewDictObj());
	    }
	    Tcl_DictObjGet(NULL, dataPtr->mcDicts,
		opts->localeObj, &opts->mcDictObj);

	    if (opts->mcDictObj == NULL) {
		/* get msgcat dictionary - ::tcl::clock::mcget locale */
		Tcl_Obj *callargs[2];

		callargs[0] = dataPtr->literals[LIT_MCGET];
		callargs[1] = opts->localeObj;

		if (Tcl_EvalObjv(opts->interp, 2, callargs, 0) != TCL_OK) {
		    return NULL;
		}

		opts->mcDictObj = Tcl_GetObjResult(opts->interp);
		Tcl_ResetResult(opts->interp);
		ref = 0; /* new object is not yet referenced */
	    }

	    /* be sure that object reference doesn't increase (dict changeable) */
	    if (opts->mcDictObj->refCount > ref) {
		/* smart reference (shared dict as object with no ref-counter) */
		opts->mcDictObj = TclDictObjSmartRef(opts->interp,
		    opts->mcDictObj);
	    }

	    /* create exactly one reference to catalog / make it searchable for future */
	    Tcl_DictObjPut(NULL, dataPtr->mcDicts, opts->localeObj,
		opts->mcDictObj);

	    if ( opts->localeObj == dataPtr->literals[LIT_C]
	      || opts->localeObj == dataPtr->defaultLocale
	    ) {
		dataPtr->defaultLocaleDict = opts->mcDictObj;
	    }
	    if ( opts->localeObj == dataPtr->currentLocale ) {
		dataPtr->currentLocaleDict = opts->mcDictObj;
	    } else if ( opts->localeObj == dataPtr->lastUsedLocale ) {
		dataPtr->lastUsedLocaleDict = opts->mcDictObj;
	    } else {
		SavePrevLocaleObj(dataPtr);
		TclSetObjRef(dataPtr->lastUsedLocale, opts->localeObj);
		TclUnsetObjRef(dataPtr->lastUsedLocaleUnnorm);
		dataPtr->lastUsedLocaleDict = opts->mcDictObj;
	    }
	}
    }

    return opts->mcDictObj;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockMCGet --
 *
 *	Retrieves a msgcat value for the given literal integer mcKey
 *	from localized storage (corresponding given locale object)
 *	by mcLiterals[mcKey] (e. g. MONTHS_FULL).
 *
 * Results:
 *	Tcl-object contains localized value.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
ClockMCGet(
    ClockFmtScnCmdArgs *opts,
    int mcKey)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    Tcl_Obj *valObj = NULL;

    if (opts->mcDictObj == NULL) {
	ClockMCDict(opts);
	if (opts->mcDictObj == NULL)
	    return NULL;
    }

    Tcl_DictObjGet(opts->interp, opts->mcDictObj,
	dataPtr->mcLiterals[mcKey], &valObj);

    return valObj; /* or NULL in obscure case if Tcl_DictObjGet failed */
}
    /* Make the clock ensemble */

    TclMakeEnsemble(interp, "clock", clockImplMap);

/*
 *----------------------------------------------------------------------
 *
 * ClockMCGetIdx --
 *
 *	Retrieves an indexed msgcat value for the given literal integer mcKey
 *	from localized storage (corresponding given locale object)
 *	by mcLitIdxs[mcKey] (e. g. _IDX_MONTHS_FULL).
 *
 * Results:
 *	Tcl-object contains localized indexed value.
 *
 *----------------------------------------------------------------------
 */

MODULE_SCOPE Tcl_Obj *
ClockMCGetIdx(
    ClockFmtScnCmdArgs *opts,
    int mcKey)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    Tcl_Obj *valObj = NULL;

    if (opts->mcDictObj == NULL) {
	ClockMCDict(opts);
	if (opts->mcDictObj == NULL)
	    return NULL;
    }

    /* try to get indices object */
    if (dataPtr->mcLitIdxs == NULL) {
	return NULL;
    }

    if (Tcl_DictObjGet(NULL, opts->mcDictObj,
	dataPtr->mcLitIdxs[mcKey], &valObj) != TCL_OK
    ) {
	return NULL;
    }

    return valObj;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockMCSetIdx --
 *
 *	Sets an indexed msgcat value for the given literal integer mcKey
 *	in localized storage (corresponding given locale object)
 *	by mcLitIdxs[mcKey] (e. g. _IDX_MONTHS_FULL).
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 *----------------------------------------------------------------------
 */

int
ClockMCSetIdx(
    ClockFmtScnCmdArgs *opts,
    int mcKey, Tcl_Obj *valObj)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    if (opts->mcDictObj == NULL) {
	ClockMCDict(opts);
	if (opts->mcDictObj == NULL)
	    return TCL_ERROR;
    }

    /* if literal storage for indices not yet created */
    if (dataPtr->mcLitIdxs == NULL) {
	int i;
	dataPtr->mcLitIdxs = (Tcl_Obj **)Tcl_Alloc(MCLIT__END * sizeof(Tcl_Obj*));
	for (i = 0; i < MCLIT__END; ++i) {
	    TclInitObjRef(dataPtr->mcLitIdxs[i],
		Tcl_NewStringObj(MsgCtLitIdxs[i], -1));
	}
    }

    return Tcl_DictObjPut(opts->interp, opts->mcDictObj,
	    dataPtr->mcLitIdxs[mcKey], valObj);
}

static void
TimezoneLoaded(
    ClockClientData *dataPtr,
    Tcl_Obj	*timezoneObj,	/* Name of zone was loaded */
    Tcl_Obj	*tzUnnormObj)	/* Name of zone was loaded */
{
    /* don't overwrite last-setup with GMT (special case) */
    if (timezoneObj == dataPtr->literals[LIT_GMT]) {
	/* mark GMT zone loaded */
	if (dataPtr->gmtSetupTimeZone == NULL) {
	    TclSetObjRef(dataPtr->gmtSetupTimeZone,
		dataPtr->literals[LIT_GMT]);
	}
	TclSetObjRef(dataPtr->gmtSetupTimeZoneUnnorm, tzUnnormObj);
	return;
    }

    /* last setup zone loaded */
    if (dataPtr->lastSetupTimeZone != timezoneObj) {
	SavePrevTimezoneObj(dataPtr);
	TclSetObjRef(dataPtr->lastSetupTimeZone, timezoneObj);
	TclUnsetObjRef(dataPtr->lastSetupTZData);
    }
    TclSetObjRef(dataPtr->lastSetupTimeZoneUnnorm, tzUnnormObj);
}
/*
 *----------------------------------------------------------------------
 *
 * ClockConfigureObjCmd --
 *
 *	This function is invoked to process the Tcl "::clock::configure" (internal) command.
 *
 * Usage:
 *	::tcl::unsupported::clock::configure ?-option ?value??
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
ClockConfigureObjCmd(
    void *clientData,  /* Client data containing literal pool */
    Tcl_Interp *interp,	    /* Tcl interpreter */
    int objc,		    /* Parameter count */
    Tcl_Obj *const objv[])  /* Parameter vector */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;

    static const char *const options[] = {
	"-system-tz",	  "-setup-tz",	  "-default-locale",	"-current-locale",
	"-clear",
	"-year-century",  "-century-switch",
	"-min-year", "-max-year", "-max-jdn", "-validate",
	"-init-complete",
	NULL
    };
    enum optionInd {
	CLOCK_SYSTEM_TZ,  CLOCK_SETUP_TZ, CLOCK_DEFAULT_LOCALE, CLOCK_CURRENT_LOCALE,
	CLOCK_CLEAR_CACHE,
	CLOCK_YEAR_CENTURY, CLOCK_CENTURY_SWITCH,
	CLOCK_MIN_YEAR, CLOCK_MAX_YEAR, CLOCK_MAX_JDN, CLOCK_VALIDATE,
	CLOCK_INIT_COMPLETE
    };
    int optionIndex;		/* Index of an option. */
    int i;

    for (i = 1; i < objc; i++) {
	if (Tcl_GetIndexFromObj(interp, objv[i++], options,
	    "option", 0, &optionIndex) != TCL_OK) {
	    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
		    Tcl_GetString(objv[i-1]), (char *)NULL);
	    return TCL_ERROR;
	}
	switch (optionIndex) {
	case CLOCK_SYSTEM_TZ: {
	    /* validate current tz-epoch */
	    size_t lastTZEpoch = TzsetIfNecessary();
	    if (i < objc) {
		if (dataPtr->systemTimeZone != objv[i]) {
		    TclSetObjRef(dataPtr->systemTimeZone, objv[i]);
		    TclUnsetObjRef(dataPtr->systemSetupTZData);
		}
		dataPtr->lastTZEpoch = lastTZEpoch;
	    }
	    if (i+1 >= objc && dataPtr->systemTimeZone != NULL
			 && dataPtr->lastTZEpoch == lastTZEpoch) {
		Tcl_SetObjResult(interp, dataPtr->systemTimeZone);
	    }
	}
	break;
	case CLOCK_SETUP_TZ:
	    if (i < objc) {
		int loaded;
		Tcl_Obj *timezoneObj = NormTimezoneObj(dataPtr, objv[i], &loaded);
		if (!loaded) {
		    TimezoneLoaded(dataPtr, timezoneObj, objv[i]);
		}
		Tcl_SetObjResult(interp, timezoneObj);
	    }
	    else
	    if (i+1 >= objc && dataPtr->lastSetupTimeZone != NULL) {
		Tcl_SetObjResult(interp, dataPtr->lastSetupTimeZone);
	    }
	break;
	case CLOCK_DEFAULT_LOCALE:
	    if (i < objc) {
		if (dataPtr->defaultLocale != objv[i]) {
		    TclSetObjRef(dataPtr->defaultLocale, objv[i]);
		    dataPtr->defaultLocaleDict = NULL;
		}
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp, dataPtr->defaultLocale ?
		    dataPtr->defaultLocale : dataPtr->literals[LIT_C]);
	    }
	break;
	case CLOCK_CURRENT_LOCALE:
	    if (i < objc) {
		if (dataPtr->currentLocale != objv[i]) {
		    TclSetObjRef(dataPtr->currentLocale, objv[i]);
		    dataPtr->currentLocaleDict = NULL;
		}
	    }
	    if (i+1 >= objc && dataPtr->currentLocale != NULL) {
		Tcl_SetObjResult(interp, dataPtr->currentLocale);
	    }
	break;
	case CLOCK_YEAR_CENTURY:
	    if (i < objc) {
		int year;
		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
		    return TCL_ERROR;
		}
		dataPtr->currentYearCentury = year;
		if (i+1 >= objc) {
		    Tcl_SetObjResult(interp, objv[i]);
		}
		continue;
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewWideIntObj(dataPtr->currentYearCentury));
	    }
	break;
	case CLOCK_CENTURY_SWITCH:
	    if (i < objc) {
		int year;
		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
		    return TCL_ERROR;
		}
		dataPtr->yearOfCenturySwitch = year;
		Tcl_SetObjResult(interp, objv[i]);
		continue;
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewWideIntObj(dataPtr->yearOfCenturySwitch));
	    }
	break;
	case CLOCK_MIN_YEAR:
	    if (i < objc) {
		int year;
		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
		    return TCL_ERROR;
		}
		dataPtr->validMinYear = year;
		Tcl_SetObjResult(interp, objv[i]);
		continue;
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewWideIntObj(dataPtr->validMinYear));
	    }
	break;
	case CLOCK_MAX_YEAR:
	    if (i < objc) {
		int year;
		if (TclGetIntFromObj(interp, objv[i], &year) != TCL_OK) {
		    return TCL_ERROR;
		}
		dataPtr->validMaxYear = year;
		Tcl_SetObjResult(interp, objv[i]);
		continue;
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewWideIntObj(dataPtr->validMaxYear));
	    }
	break;
	case CLOCK_MAX_JDN:
	    if (i < objc) {
		double jd;
		if (Tcl_GetDoubleFromObj(interp, objv[i], &jd) != TCL_OK) {
		    return TCL_ERROR;
		}
		dataPtr->maxJDN = jd;
		Tcl_SetObjResult(interp, objv[i]);
		continue;
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewDoubleObj(dataPtr->maxJDN));
	    }
	break;
	case CLOCK_VALIDATE:
	    if (i < objc) {
		int val;
		if (Tcl_GetBooleanFromObj(interp, objv[i], &val) != TCL_OK) {
		    return TCL_ERROR;
		}
		if (val) {
		    dataPtr->defFlags |= CLF_VALIDATE;
		} else {
		    dataPtr->defFlags &= ~CLF_VALIDATE;
		}
	    }
	    if (i+1 >= objc) {
		Tcl_SetObjResult(interp,
		    Tcl_NewWideIntObj(dataPtr->defFlags & CLF_VALIDATE ? 1 : 0));
	    }
	break;
	case CLOCK_CLEAR_CACHE:
	    ClockConfigureClear(dataPtr);
	break;
	case CLOCK_INIT_COMPLETE:
	    {
		/*
		 * Init completed.
		 * Compile clock ensemble (performance purposes).
		 */
		Tcl_Command token = Tcl_FindCommand(interp, "::clock",
		    NULL, TCL_GLOBAL_ONLY);
		if (!token) {
		    return TCL_ERROR;
		}
		int ensFlags = 0;
		if (Tcl_GetEnsembleFlags(interp, token, &ensFlags) != TCL_OK) {
		    return TCL_ERROR;
		}
		ensFlags |= ENSEMBLE_COMPILE;
		if (Tcl_SetEnsembleFlags(interp, token, ensFlags) != TCL_OK) {
		    return TCL_ERROR;
		}
	    }
	break;
	}
    }

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockGetTZData --
 *
 *	Retrieves tzdata table for given normalized timezone.
 *
 * Results:
 *	Returns a tcl object with tzdata.
 *
 * Side effects:
 *	The tzdata can be cached in ClockClientData structure.
 *
 *----------------------------------------------------------------------
 */

static inline Tcl_Obj *
ClockGetTZData(
    void *clientData,	/* Opaque pointer to literal pool, etc. */
    Tcl_Interp *interp,		/* Tcl interpreter */
    Tcl_Obj *timezoneObj)	/* Name of the timezone */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;
    Tcl_Obj *ret, **out = NULL;

    /* if cached (if already setup this one) */
    if ( timezoneObj == dataPtr->lastSetupTimeZone
      || timezoneObj == dataPtr->lastSetupTimeZoneUnnorm
    ) {
	if (dataPtr->lastSetupTZData != NULL) {
	    return dataPtr->lastSetupTZData;
	}
	out = &dataPtr->lastSetupTZData;
    }
    /* differentiate GMT and system zones, because used often */
    /* simple caching, because almost used the tz-data of last timezone
     */
    if (timezoneObj == dataPtr->systemTimeZone) {
	if (dataPtr->systemSetupTZData != NULL) {
	    return dataPtr->systemSetupTZData;
	}
	out = &dataPtr->systemSetupTZData;
    }
    else
    if ( timezoneObj == dataPtr->literals[LIT_GMT]
      || timezoneObj == dataPtr->gmtSetupTimeZoneUnnorm
    ) {
	if (dataPtr->gmtSetupTZData != NULL) {
	    return dataPtr->gmtSetupTZData;
	}
	out = &dataPtr->gmtSetupTZData;
    }
    else
    if ( timezoneObj == dataPtr->prevSetupTimeZone
      || timezoneObj == dataPtr->prevSetupTimeZoneUnnorm
    ) {
	if (dataPtr->prevSetupTZData != NULL) {
	    return dataPtr->prevSetupTZData;
	}
	out = &dataPtr->prevSetupTZData;
    }

    ret = Tcl_ObjGetVar2(interp, dataPtr->literals[LIT_TZDATA],
	timezoneObj, TCL_LEAVE_ERR_MSG);

    /* cache using corresponding slot and as last used */
    if (out != NULL) {
	TclSetObjRef(*out, ret);
    }
    else
    if (dataPtr->lastSetupTimeZone != timezoneObj) {
	SavePrevTimezoneObj(dataPtr);
	TclSetObjRef(dataPtr->lastSetupTimeZone, timezoneObj);
	TclUnsetObjRef(dataPtr->lastSetupTimeZoneUnnorm);
	TclSetObjRef(dataPtr->lastSetupTZData, ret);
    }
    return ret;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockGetSystemTimeZone --
 *
 *	Returns system (current) timezone.
 *
 *	If system zone not yet cached, it executes ::tcl::clock::GetSystemTimeZone
 *	in given interpreter and caches its result.
 *
 * Results:
 *	Returns normalized timezone object.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
ClockGetSystemTimeZone(
    void *clientData,	/* Opaque pointer to literal pool, etc. */
    Tcl_Interp *interp)		/* Tcl interpreter */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;

    /* if known (cached and same epoch) - return now */
    if (dataPtr->systemTimeZone != NULL
	    && dataPtr->lastTZEpoch == TzsetIfNecessary()) {
	return dataPtr->systemTimeZone;
    }

    TclUnsetObjRef(dataPtr->systemTimeZone);
    TclUnsetObjRef(dataPtr->systemSetupTZData);

    if (Tcl_EvalObjv(interp, 1, &dataPtr->literals[LIT_GETSYSTEMTIMEZONE], 0) != TCL_OK) {
	return NULL;
    }
    if (dataPtr->systemTimeZone == NULL) {
	TclSetObjRef(dataPtr->systemTimeZone, Tcl_GetObjResult(interp));
    }
    Tcl_ResetResult(interp);
    return dataPtr->systemTimeZone;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockSetupTimeZone --
 *
 *	Sets up the timezone. Loads tzdata, etc.
 *
 * Results:
 *	Returns normalized timezone object.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
ClockSetupTimeZone(
    void *clientData,	/* Opaque pointer to literal pool, etc. */
    Tcl_Interp *interp,		/* Tcl interpreter */
    Tcl_Obj *timezoneObj)
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;
    int loaded;
    Tcl_Obj *callargs[2];

    /* if cached (if already setup this one) */
    if ( timezoneObj == dataPtr->literals[LIT_GMT]
      && dataPtr->gmtSetupTZData != NULL
    ) {
	return timezoneObj;
    }
    if ( ( timezoneObj == dataPtr->lastSetupTimeZone
	|| timezoneObj == dataPtr->lastSetupTimeZoneUnnorm
      ) && dataPtr->lastSetupTimeZone != NULL
    ) {
	return dataPtr->lastSetupTimeZone;
    }
    if ( ( timezoneObj == dataPtr->prevSetupTimeZone
	|| timezoneObj == dataPtr->prevSetupTimeZoneUnnorm
      ) && dataPtr->prevSetupTimeZone != NULL
    ) {
	return dataPtr->prevSetupTimeZone;
    }

    /* differentiate normalized (last, GMT and system) zones, because used often and already set */
    callargs[1] = NormTimezoneObj(dataPtr, timezoneObj, &loaded);
    /* if loaded (setup already called for this TZ) */
    if (loaded) {
	return callargs[1];
    }

    /* before setup just take a look in TZData variable */
    if (Tcl_ObjGetVar2(interp, dataPtr->literals[LIT_TZDATA], timezoneObj, 0)) {
    	/* put it to last slot and return normalized */
    	TimezoneLoaded(dataPtr, callargs[1], timezoneObj);
	return callargs[1];
    }
    /* setup now */
    callargs[0] = dataPtr->literals[LIT_SETUPTIMEZONE];
    if (Tcl_EvalObjv(interp, 2, callargs, 0) == TCL_OK) {
	/* save unnormalized last used */
	TclSetObjRef(dataPtr->lastSetupTimeZoneUnnorm, timezoneObj);
	return callargs[1];
    }
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockFormatNumericTimeZone --
 *
 *	Formats a time zone as +hhmmss
 *
 * Parameters:
 *	z - Time zone in seconds east of Greenwich
 *
 * Results:
 *	Returns the time zone object (formatted in a numeric form)
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
ClockFormatNumericTimeZone(int z) {
    char buf[12+1], *p;

    if ( z < 0 ) {
	z = -z;
	*buf = '-';
    } else {
	*buf = '+';
    }
    TclItoAw(buf+1, z / 3600, '0', 2);   z %= 3600;
    p = TclItoAw(buf+3, z / 60, '0', 2); z %= 60;
    if (z != 0) {
	p = TclItoAw(buf+5, z, '0', 2);
    }
    return Tcl_NewStringObj(buf, p - buf);
}

/*
 *----------------------------------------------------------------------
 *
 * ClockConvertlocaltoutcObjCmd --
 *
 *	Tcl command that converts a UTC time to a local time by whatever means
 *	is available.
 *
 * Usage:
 *	::tcl::clock::ConvertUTCToLocal dictionary tzdata changeover
 *	::tcl::clock::ConvertUTCToLocal dictionary timezone changeover
 *
 * Parameters:
 *	dict - Dictionary containing a 'localSeconds' entry.
 *	tzdata - Time zone data
 *	timezone - Time zone
 *	changeover - Julian Day of the adoption of the Gregorian calendar.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	On success, sets the interpreter result to the given dictionary
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    Tcl_Obj *secondsObj;
    Tcl_Obj *dict;
    int changeover;
    TclDateFields fields;
    int created = 0;
    int status;

    fields.tzName = NULL;
    /*
     * Check params and convert time.
     */

    if (objc != 4) {
	Tcl_WrongNumArgs(interp, 1, objv, "dict tzdata changeover");
	Tcl_WrongNumArgs(interp, 1, objv, "dict timezone changeover");
	return TCL_ERROR;
    }
    dict = objv[1];
    if (Tcl_DictObjGet(interp, dict, data->literals[LIT_LOCALSECONDS],
	    &secondsObj)!= TCL_OK) {
	return TCL_ERROR;
    }
    if (secondsObj == NULL) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("key \"localseconds\" not "
		"found in dictionary", -1));
	return TCL_ERROR;
    }
    if ((TclGetWideIntFromObj(interp, secondsObj,
	    &fields.localSeconds) != TCL_OK)
	|| (TclGetIntFromObj(interp, objv[3], &changeover) != TCL_OK)
	|| ConvertLocalToUTC(interp, &fields, objv[2], changeover)) {
	|| ConvertLocalToUTC(clientData, interp, &fields, objv[2], changeover)) {
	return TCL_ERROR;
    }

    /*
     * Copy-on-write; set the 'seconds' field in the dictionary and place the
     * modified dictionary in the interpreter result.
     */
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 *
 * ClockGetdatefieldsObjCmd --
 *
 *	Tcl command that determines the values that [clock format] will use in
 *	formatting a date, and populates a dictionary with them.
 *
 * Usage:
 *	::tcl::clock::GetDateFields seconds tzdata changeover
 *	::tcl::clock::GetDateFields seconds timezone changeover
 *
 * Parameters:
 *	seconds - Time expressed in seconds from the Posix epoch.
 *	tzdata - Time zone data of the time zone in which time is to be
 *	timezone - Time zone in which time is to be expressed.
 *		 expressed.
 *	changeover - Julian Day Number at which the current locale adopted
 *		     the Gregorian calendar
 *
 * Results:
 *	Returns a dictonary populated with the fields:
 *		seconds - Seconds from the Posix epoch
 *		localSeconds - Nominal seconds from the Posix epoch in the
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{
    TclDateFields fields;
    Tcl_Obj *dict;
    ClockClientData *data = (ClockClientData *)clientData;
    Tcl_Obj *const *lit = data->literals;
    int changeover;

    fields.tzName = NULL;

    /*
     * Check params.
     */

    if (objc != 4) {
	Tcl_WrongNumArgs(interp, 1, objv, "seconds tzdata changeover");
	Tcl_WrongNumArgs(interp, 1, objv, "seconds timezone changeover");
	return TCL_ERROR;
    }
    if (TclGetWideIntFromObj(interp, objv[1], &fields.seconds) != TCL_OK
	    || TclGetIntFromObj(interp, objv[3], &changeover) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * fields.seconds could be an unsigned number that overflowed. Make sure
     * that it isn't.
     */

    if (TclHasInternalRep(objv[1], &tclBignumType)) {
	Tcl_SetObjResult(interp, lit[LIT_INTEGER_VALUE_TOO_LARGE]);
	return TCL_ERROR;
    }

    /*
    /* Extract fields */
     * Convert UTC time to local.
     */

    if (ClockGetDateFields(clientData, interp, &fields, objv[2],
    if (ConvertUTCToLocal(interp, &fields, objv[2], changeover) != TCL_OK) {
	  changeover) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Extract Julian day. Always round the quotient down by subtracting 1
     * when the remainder is negative (i.e. if the quotient was rounded up).
     */

    /* Make dict of fields */
    fields.julianDay = (int) ((fields.localSeconds / SECONDS_PER_DAY) -
	    ((fields.localSeconds % SECONDS_PER_DAY) < 0) +
	    JULIAN_DAY_POSIX_EPOCH);

    /*
     * Convert to Julian or Gregorian calendar.
     */

    GetGregorianEraYearDay(&fields, changeover);
    GetMonthDay(&fields);
    GetYearWeekDay(&fields, changeover);

    dict = Tcl_NewDictObj();
    Tcl_DictObjPut(NULL, dict, lit[LIT_LOCALSECONDS],
	    Tcl_NewWideIntObj(fields.localSeconds));
    Tcl_DictObjPut(NULL, dict, lit[LIT_SECONDS],
	    Tcl_NewWideIntObj(fields.seconds));
    Tcl_DictObjPut(NULL, dict, lit[LIT_TZNAME], fields.tzName);
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	    Tcl_NewWideIntObj(fields.iso8601Year));
    Tcl_DictObjPut(NULL, dict, lit[LIT_ISO8601WEEK],
	    Tcl_NewWideIntObj(fields.iso8601Week));
    Tcl_DictObjPut(NULL, dict, lit[LIT_DAYOFWEEK],
	    Tcl_NewWideIntObj(fields.dayOfWeek));
    Tcl_SetObjResult(interp, dict);

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockGetDateFields --
 *
 *	Converts given UTC time (seconds in a TclDateFields structure)
 *	to local time and determines the values that clock routines will
 *	use in scanning or formatting a date.
 *
 * Results:
 *	Date-time values are stored in structure "fields".
 *	Returns a standard Tcl result.
 *
 *----------------------------------------------------------------------
 */

int
ClockGetDateFields(
    void *clientData,	/* Client data of the interpreter */
    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Pointer to result fields, where
				 * fields->seconds contains date to extract */
    Tcl_Obj *timezoneObj,	/* Time zone object or NULL for gmt */
    int changeover)		/* Julian Day Number */
{
    /*
     * Convert UTC time to local.
     */

    if (ConvertUTCToLocal(clientData, interp, fields, timezoneObj,
	    changeover) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Extract Julian day and seconds of the day.
     */

    ClockExtractJDAndSODFromSeconds(fields->julianDay, fields->secondOfDay,
	fields->localSeconds);

    /*
     * Convert to Julian or Gregorian calendar.
     */

    GetGregorianEraYearDay(fields, changeover);
    GetMonthDay(fields);
    GetYearWeekDay(fields, changeover);

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockGetjuliandayfromerayearmonthdayObjCmd --
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    Tcl_Obj *dict;
    ClockClientData *data = (ClockClientData *)clientData;
    Tcl_Obj *const *lit = data->literals;
    int changeover;
    int copied = 0;
    int status;
    int isBce = 0;

    fields.tzName = NULL;

    /*
     * Check params.
     */

    if (objc != 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "dict changeover");
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    ClockClientData *data = (ClockClientData *)clientData;
    Tcl_Obj *const *lit = data->literals;
    int changeover;
    int copied = 0;
    int status;
    int isBce = 0;

    fields.tzName = NULL;

    /*
     * Check params.
     */

    if (objc != 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "dict changeover");
	return TCL_ERROR;
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 *	in the interpreter result on failure.
 *
 *----------------------------------------------------------------------
 */

static int
ConvertLocalToUTC(
    void *clientData,	/* Client data of the interpreter */
    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Fields of the time */
    Tcl_Obj *tzdata,		/* Time zone data */
    Tcl_Obj *timezoneObj,	/* Time zone */
    int changeover)		/* Julian Day of the Gregorian transition */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;
    Tcl_Obj *tzdata;		/* Time zone data */
    Tcl_Size rowc;			/* Number of rows in tzdata */
    Tcl_Obj **rowv;		/* Pointers to the rows */
    Tcl_WideInt seconds;
    ClockLastTZOffs * ltzoc = NULL;

    /* fast phase-out for shared GMT-object (don't need to convert UTC 2 UTC) */
    if (timezoneObj == dataPtr->literals[LIT_GMT]) {
	fields->seconds = fields->localSeconds;
	fields->tzOffset = 0;
	return TCL_OK;
    }

    /*
     * Check cacheable conversion could be used
     * (last-period UTC2Local cache within the same TZ and seconds)
     */
    for (rowc = 0; rowc < 2; rowc++) {
	ltzoc = &dataPtr->lastTZOffsCache[rowc];
	if (timezoneObj != ltzoc->timezoneObj || changeover != ltzoc->changeover) {
	    ltzoc = NULL;
	    continue;
	}
	seconds = fields->localSeconds - ltzoc->tzOffset;
	if ( seconds >= ltzoc->rangesVal[0]
	  && seconds <  ltzoc->rangesVal[1]
	) {
	    /* the same time zone and offset (UTC time inside the last minute) */
	    fields->tzOffset = ltzoc->tzOffset;
	    fields->seconds = seconds;
	    return TCL_OK;
	}
	/* in the DST-hole (because of the check above) - correct localSeconds */
	if (fields->localSeconds == ltzoc->localSeconds) {
	    /* the same time zone and offset (but we'll shift local-time) */
	    fields->tzOffset = ltzoc->tzOffset;
	    fields->seconds = seconds;
	    goto dstHole;
	}
    }

    /*
     * Unpack the tz data.
     */

    tzdata = ClockGetTZData(clientData, interp, timezoneObj);
    if (tzdata == NULL) {
	return TCL_ERROR;
    }

    if (TclListObjGetElements(interp, tzdata, &rowc, &rowv) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Special case: If the time zone is :localtime, the tzdata will be empty.
     * Use 'mktime' to convert the time to local
     */

    if (rowc == 0) {

	return ConvertLocalToUTCUsingC(interp, fields, changeover);
	if (ConvertLocalToUTCUsingC(interp, fields, changeover) != TCL_OK) {
	    return TCL_ERROR;
	};

	/* we cannot cache (ranges unknown yet) - todo: check later the DST-hole here */
	return TCL_OK;

    } else {
	Tcl_WideInt rangesVal[2];

	return ConvertLocalToUTCUsingTable(interp, fields, rowc, rowv);
    }
	if (ConvertLocalToUTCUsingTable(interp, fields, rowc, rowv,
		rangesVal) != TCL_OK) {
	    return TCL_ERROR;
	};

	seconds = fields->seconds;

	/* Cache the last conversion */
	if (ltzoc != NULL) { /* slot was found above */
	    /* timezoneObj and changeover are the same */
	    TclSetObjRef(ltzoc->tzName, fields->tzName); /* may be NULL */
	} else {
	    /* no TZ in cache - just move second slot down and use the first one */
	    ltzoc = &dataPtr->lastTZOffsCache[0];
	    TclUnsetObjRef(dataPtr->lastTZOffsCache[1].timezoneObj);
	    TclUnsetObjRef(dataPtr->lastTZOffsCache[1].tzName);
	    memcpy(&dataPtr->lastTZOffsCache[1], ltzoc, sizeof(*ltzoc));
	    TclInitObjRef(ltzoc->timezoneObj, timezoneObj);
	    ltzoc->changeover = changeover;
	    TclInitObjRef(ltzoc->tzName, fields->tzName); /* may be NULL */
	}
	ltzoc->localSeconds = fields->localSeconds;
	ltzoc->rangesVal[0] = rangesVal[0];
	ltzoc->rangesVal[1] = rangesVal[1];
	ltzoc->tzOffset = fields->tzOffset;
    }


    /* check DST-hole: if retrieved seconds is out of range */
    if ( ltzoc->rangesVal[0] > seconds || seconds >= ltzoc->rangesVal[1] ) {
    dstHole:
	#if 0
	printf("given local-time is outside the time-zone (in DST-hole): "
		"%d - offs %d => %d <= %d < %d\n",
		(int)fields->localSeconds, fields->tzOffset,
		(int)ltzoc->rangesVal[0], (int)seconds, (int)ltzoc->rangesVal[1]);
	#endif
	/* because we don't know real TZ (we're outsize), just invalidate local
	 * time (which could be verified in ClockValidDate later) */
	fields->localSeconds = TCL_INV_SECONDS; /* not valid seconds */
    }
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ConvertLocalToUTCUsingTable --
 *
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+
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-


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-


+
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+
+







 *----------------------------------------------------------------------
 */

static int
ConvertLocalToUTCUsingTable(
    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Time to convert, with 'seconds' filled in */
    Tcl_Size rowc,			/* Number of points at which time changes */
    Tcl_Obj *const rowv[])	/* Points at which time changes */
    int rowc,			/* Number of points at which time changes */
    Tcl_Obj *const rowv[],	/* Points at which time changes */
    Tcl_WideInt *rangesVal)	/* Return bounds for time period */
{
    Tcl_Obj *row;
    Tcl_Size cellc;
    Tcl_Obj **cellv;
    struct {
	Tcl_Obj *tzName;
	int tzOffset;
    int have[8];
    } have[8];
    int nHave = 0;
    int i;
    Tcl_Size i;
    int found;

    /*
     * Perform an initial lookup assuming that local == UTC, and locate the
     * last time conversion prior to that time. Get the offset from that row,
     * and look up again. Continue until we find an offset that we found
     * before. This definition, rather than "the same offset" ensures that we
     * don't enter an endless loop, as would otherwise happen when trying to
     * convert a non-existent time such as 02:30 during the US Spring Daylight
     * Saving Time transition.
     */

    found = 0;
    fields->tzOffset = 0;
    fields->seconds = fields->localSeconds;
    while (!found) {
	row = LookupLastTransition(interp, fields->seconds, rowc, rowv);
    while (1) {
	row = LookupLastTransition(interp, fields->seconds, rowc, rowv,
		    rangesVal);
	if ((row == NULL)
		|| TclListObjGetElements(interp, row, &cellc,
		    &cellv) != TCL_OK
		|| TclGetIntFromObj(interp, cellv[1],
		    &fields->tzOffset) != TCL_OK) {
	    return TCL_ERROR;
	}
	found = 0;
	for (i = 0; !found && i < nHave; ++i) {
	    if (have[i] == fields->tzOffset) {
		found = 1;
	for (i = 0; i < nHave; ++i) {
	    if (have[i].tzOffset == fields->tzOffset) {
		goto found;
		break;
	    }
	}
	if (!found) {
	    if (nHave == 8) {
		Tcl_Panic("loop in ConvertLocalToUTCUsingTable");
	    }
	    have[nHave++] = fields->tzOffset;
	if (nHave == 8) {
	    Tcl_Panic("loop in ConvertLocalToUTCUsingTable");
	}
	have[nHave].tzName = cellv[3];
	have[nHave++].tzOffset = fields->tzOffset;
	}
	fields->seconds = fields->localSeconds - fields->tzOffset;
    }

  found:
    fields->tzOffset = have[i];
    fields->tzOffset = have[i].tzOffset;
    fields->seconds = fields->localSeconds - fields->tzOffset;
    TclSetObjRef(fields->tzName, have[i].tzName);

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ConvertLocalToUTCUsingC --
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2123







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    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Time to convert, with 'seconds' filled in */
    int changeover)		/* Julian Day of the Gregorian transition */
{
    struct tm timeVal;
    int localErrno;
    int secondOfDay;
    Tcl_WideInt jsec;

    /*
     * Convert the given time to a date.
     */

    jsec = fields->localSeconds + JULIAN_SEC_POSIX_EPOCH;
    fields->julianDay = (int) (jsec / SECONDS_PER_DAY);
    ClockExtractJDAndSODFromSeconds(fields->julianDay, secondOfDay,
    secondOfDay = (int)(jsec % SECONDS_PER_DAY);
    if (secondOfDay < 0) {
	secondOfDay += SECONDS_PER_DAY;
	fields->julianDay--;
    }
	fields->localSeconds);

    GetGregorianEraYearDay(fields, changeover);
    GetMonthDay(fields);

    /*
     * Convert the date/time to a 'struct tm'.
     */

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 *
 * Side effects:
 *	Populates the 'tzName' and 'tzOffset' fields.
 *
 *----------------------------------------------------------------------
 */

static int
int
ConvertUTCToLocal(
    void *clientData,	/* Client data of the interpreter */
    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Fields of the time */
    Tcl_Obj *tzdata,		/* Time zone data */
    Tcl_Obj *timezoneObj,	/* Time zone */
    int changeover)		/* Julian Day of the Gregorian transition */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;
    Tcl_Obj *tzdata;		/* Time zone data */
    Tcl_Size rowc;			/* Number of rows in tzdata */
    Tcl_Obj **rowv;		/* Pointers to the rows */
    ClockLastTZOffs * ltzoc = NULL;

    /* fast phase-out for shared GMT-object (don't need to convert UTC 2 UTC) */
    if (timezoneObj == dataPtr->literals[LIT_GMT]) {
	fields->localSeconds = fields->seconds;
	fields->tzOffset = 0;
	if (dataPtr->gmtTZName == NULL) {
	    Tcl_Obj *tzName;
	    tzdata = ClockGetTZData(clientData, interp, timezoneObj);
	    if ( TclListObjGetElements(interp, tzdata, &rowc, &rowv) != TCL_OK
	      || Tcl_ListObjIndex(interp, rowv[0], 3, &tzName) != TCL_OK) {
		return TCL_ERROR;
	    }
	    TclSetObjRef(dataPtr->gmtTZName, tzName);
	}
	TclSetObjRef(fields->tzName, dataPtr->gmtTZName);
	return TCL_OK;
    }

    /*
     * Check cacheable conversion could be used
     * (last-period UTC2Local cache within the same TZ and seconds)
     */
    for (rowc = 0; rowc < 2; rowc++) {
	ltzoc = &dataPtr->lastTZOffsCache[rowc];
	if (timezoneObj != ltzoc->timezoneObj || changeover != ltzoc->changeover) {
	    ltzoc = NULL;
	    continue;
	}
	if ( fields->seconds >= ltzoc->rangesVal[0]
	  && fields->seconds <  ltzoc->rangesVal[1]
	) {
	    /* the same time zone and offset (UTC time inside the last minute) */
	    fields->tzOffset = ltzoc->tzOffset;
	    fields->localSeconds = fields->seconds + fields->tzOffset;
	    TclSetObjRef(fields->tzName, ltzoc->tzName);
	    return TCL_OK;
	}
    }

    /*
     * Unpack the tz data.
     */

    tzdata = ClockGetTZData(clientData, interp, timezoneObj);
    if (tzdata == NULL) {
	return TCL_ERROR;
    }

    if (TclListObjGetElements(interp, tzdata, &rowc, &rowv) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Special case: If the time zone is :localtime, the tzdata will be empty.
     * Use 'localtime' to convert the time to local
     */

    if (rowc == 0) {

	return ConvertUTCToLocalUsingC(interp, fields, changeover);
	if (ConvertUTCToLocalUsingC(interp, fields, changeover) != TCL_OK) {
	    return TCL_ERROR;
	}

	/* signal we need to revalidate TZ epoch next time fields gets used. */
	fields->flags |= CLF_CTZ;

	/* we cannot cache (ranges unknown yet) */
    } else {
	Tcl_WideInt rangesVal[2];

	return ConvertUTCToLocalUsingTable(interp, fields, rowc, rowv);
    }
	if (ConvertUTCToLocalUsingTable(interp, fields, rowc, rowv,
		rangesVal) != TCL_OK) {
	    return TCL_ERROR;
	}

	/* converted using table (TZ isn't :localtime) */
	fields->flags &= ~CLF_CTZ;

	/* Cache the last conversion */
	if (ltzoc != NULL) { /* slot was found above */
	    /* timezoneObj and changeover are the same */
	    TclSetObjRef(ltzoc->tzName, fields->tzName);
	} else {
	    /* no TZ in cache - just move second slot down and use the first one */
	    ltzoc = &dataPtr->lastTZOffsCache[0];
	    TclUnsetObjRef(dataPtr->lastTZOffsCache[1].timezoneObj);
	    TclUnsetObjRef(dataPtr->lastTZOffsCache[1].tzName);
	    memcpy(&dataPtr->lastTZOffsCache[1], ltzoc, sizeof(*ltzoc));
	    TclInitObjRef(ltzoc->timezoneObj, timezoneObj);
	    ltzoc->changeover = changeover;
	    TclInitObjRef(ltzoc->tzName, fields->tzName);
	}
	ltzoc->localSeconds = fields->localSeconds;
	ltzoc->rangesVal[0] = rangesVal[0];
	ltzoc->rangesVal[1] = rangesVal[1];
	ltzoc->tzOffset = fields->tzOffset;
    }

    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ConvertUTCToLocalUsingTable --
 *
971
972
973
974
975
976
977
978


979
980
981
982
983
984
985
986
987
988

989
990
991
992
993
994
995
996
997
998
999

1000
1001
1002
1003
1004
1005
1006
1007
2306
2307
2308
2309
2310
2311
2312

2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323

2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334

2335

2336
2337
2338
2339
2340
2341
2342







-
+
+









-
+










-
+
-








static int
ConvertUTCToLocalUsingTable(
    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Fields of the date */
    Tcl_Size rowc,			/* Number of rows in the conversion table
				 * (>= 1) */
    Tcl_Obj *const rowv[])	/* Rows of the conversion table */
    Tcl_Obj *const rowv[],	/* Rows of the conversion table */
    Tcl_WideInt *rangesVal)	/* Return bounds for time period */
{
    Tcl_Obj *row;		/* Row containing the current information */
    Tcl_Size cellc;			/* Count of cells in the row (must be 4) */
    Tcl_Obj **cellv;		/* Pointers to the cells */

    /*
     * Look up the nearest transition time.
     */

    row = LookupLastTransition(interp, fields->seconds, rowc, rowv);
    row = LookupLastTransition(interp, fields->seconds, rowc, rowv, rangesVal);
    if (row == NULL ||
	    TclListObjGetElements(interp, row, &cellc, &cellv) != TCL_OK ||
	    TclGetIntFromObj(interp, cellv[1], &fields->tzOffset) != TCL_OK) {
	return TCL_ERROR;
    }

    /*
     * Convert the time.
     */

    fields->tzName = cellv[3];
    TclSetObjRef(fields->tzName, cellv[3]);
    Tcl_IncrRefCount(fields->tzName);
    fields->localSeconds = fields->seconds + fields->tzOffset;
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
1026
1027
1028
1029
1030
1031
1032
1033

1034
1035
1036
1037
1038
1039
1040
2361
2362
2363
2364
2365
2366
2367

2368
2369
2370
2371
2372
2373
2374
2375







-
+







    Tcl_Interp *interp,		/* Tcl interpreter */
    TclDateFields *fields,	/* Time to convert, with 'seconds' filled in */
    int changeover)		/* Julian Day of the Gregorian transition */
{
    time_t tock;
    struct tm *timeVal;		/* Time after conversion */
    int diff;			/* Time zone diff local-Greenwich */
    char buffer[16];		/* Buffer for time zone name */
    char buffer[16], *p;	/* Buffer for time zone name */

    /*
     * Use 'localtime' to determine local year, month, day, time of day.
     */

    tock = (time_t) fields->seconds;
    if ((Tcl_WideInt) tock != fields->seconds) {
1063
1064
1065
1066
1067
1068
1069
1070

1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087

1088
1089
1090
1091



1092
1093

1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112

1113
1114
1115
1116
1117


1118
1119

1120
1121

1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137





1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155

1156
1157

1158
1159





1160
1161
1162
1163
1164
1165
1166
2398
2399
2400
2401
2402
2403
2404

2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420


2421




2422
2423
2424
2425

2426

2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443

2444
2445
2446
2447
2448

2449
2450
2451

2452
2453

2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469

2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510







-
+















-
-
+
-
-
-
-
+
+
+

-
+
-

















-
+




-
+
+

-
+

-
+















-
+
+
+
+
+


















+


+


+
+
+
+
+







    fields->dayOfMonth = timeVal->tm_mday;
    GetJulianDayFromEraYearMonthDay(fields, changeover);

    /*
     * Convert that value to seconds.
     */

    fields->localSeconds = (((fields->julianDay * (Tcl_WideInt) 24
    fields->localSeconds = (((fields->julianDay * 24LL
	    + timeVal->tm_hour) * 60 + timeVal->tm_min) * 60
	    + timeVal->tm_sec) - JULIAN_SEC_POSIX_EPOCH;

    /*
     * Determine a time zone offset and name; just use +hhmm for the name.
     */

    diff = (int) (fields->localSeconds - fields->seconds);
    fields->tzOffset = diff;
    if (diff < 0) {
	*buffer = '-';
	diff = -diff;
    } else {
	*buffer = '+';
    }
    snprintf(buffer+1, sizeof(buffer) - 1, "%02d", diff / 3600);
    diff %= 3600;
    TclItoAw(buffer+1, diff / 3600, '0', 2);   diff %= 3600;
    snprintf(buffer+3, sizeof(buffer) - 3, "%02d", diff / 60);
    diff %= 60;
    if (diff > 0) {
	snprintf(buffer+5, sizeof(buffer) - 5, "%02d", diff);
    p = TclItoAw(buffer+3, diff / 60, '0', 2); diff %= 60;
    if (diff != 0) {
	p = TclItoAw(buffer+5, diff, '0', 2);
    }
    fields->tzName = Tcl_NewStringObj(buffer, -1);
    TclSetObjRef(fields->tzName, Tcl_NewStringObj(buffer, p - buffer));
    Tcl_IncrRefCount(fields->tzName);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * LookupLastTransition --
 *
 *	Given a UTC time and a tzdata array, looks up the last transition on
 *	or before the given time.
 *
 * Results:
 *	Returns a pointer to the row, or NULL if an error occurs.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
Tcl_Obj *
LookupLastTransition(
    Tcl_Interp *interp,		/* Interpreter for error messages */
    Tcl_WideInt tick,		/* Time from the epoch */
    Tcl_Size rowc,			/* Number of rows of tzdata */
    Tcl_Obj *const *rowv)	/* Rows in tzdata */
    Tcl_Obj *const *rowv,	/* Rows in tzdata */
    Tcl_WideInt *rangesVal)	/* Return bounds for time period */
{
    Tcl_Size l, u;
	Tcl_Size l, u;
    Tcl_Obj *compObj;
    Tcl_WideInt compVal;
    Tcl_WideInt compVal, fromVal = LLONG_MIN, toVal = LLONG_MAX;

    /*
     * Examine the first row to make sure we're in bounds.
     */

    if (Tcl_ListObjIndex(interp, rowv[0], 0, &compObj) != TCL_OK
	    || TclGetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
	return NULL;
    }

    /*
     * Bizarre case - first row doesn't begin at MIN_WIDE_INT. Return it
     * anyway.
     */

    if (tick < compVal) {
    if (tick < (fromVal = compVal)) {
	if (rangesVal) {
	    rangesVal[0] = fromVal;
	    rangesVal[1] = toVal;
	}
	return rowv[0];
    }

    /*
     * Binary-search to find the transition.
     */

    l = 0;
    u = rowc-1;
    while (l < u) {
	Tcl_Size m = (l + u + 1) / 2;

	if (Tcl_ListObjIndex(interp, rowv[m], 0, &compObj) != TCL_OK ||
		TclGetWideIntFromObj(interp, compObj, &compVal) != TCL_OK) {
	    return NULL;
	}
	if (tick >= compVal) {
	    l = m;
	    fromVal = compVal;
	} else {
	    u = m-1;
	    toVal = compVal;
	}
    }

    if (rangesVal) {
	rangesVal[0] = fromVal;
	rangesVal[1] = toVal;
    }
    return rowv[l];
}

/*
 *----------------------------------------------------------------------
 *
 * GetYearWeekDay --
1182
1183
1184
1185
1186
1187
1188


1189
1190
1191
1192
1193
1194
1195
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541







+
+







GetYearWeekDay(
    TclDateFields *fields,	/* Date to convert, must have 'julianDay' */
    int changeover)		/* Julian Day Number of the Gregorian
				 * transition */
{
    TclDateFields temp;
    int dayOfFiscalYear;

    temp.tzName = NULL;

    /*
     * Find the given date, minus three days, plus one year. That date's
     * iso8601 year is an upper bound on the ISO8601 year of the given date.
     */

    temp.julianDay = fields->julianDay - 3;
1405
1406
1407
1408
1409
1410
1411
1412

1413
1414
1415
1416
1417
1418
1419
1420


1421
1422
1423
1424
1425
1426
1427
2751
2752
2753
2754
2755
2756
2757

2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775







-
+








+
+







 *
 * Side effects:
 *	Stores 'julianDay' in the fields.
 *
 *----------------------------------------------------------------------
 */

static void
void
GetJulianDayFromEraYearWeekDay(
    TclDateFields *fields,	/* Date to convert */
    int changeover)		/* Julian Day Number of the Gregorian
				 * transition */
{
    Tcl_WideInt firstMonday;	/* Julian day number of week 1, day 1 in the
				 * given year */
    TclDateFields firstWeek;

    firstWeek.tzName = NULL;

    /*
     * Find January 4 in the ISO8601 year, which will always be in week 1.
     */

    firstWeek.isBce = fields->isBce;
    firstWeek.year = fields->iso8601Year;
1456
1457
1458
1459
1460
1461
1462
1463

1464
1465
1466
1467
1468
1469
1470
2804
2805
2806
2807
2808
2809
2810

2811
2812
2813
2814
2815
2816
2817
2818







-
+







 *
 * Side effects:
 *	Stores day number in 'julianDay'
 *
 *----------------------------------------------------------------------
 */

static void
void
GetJulianDayFromEraYearMonthDay(
    TclDateFields *fields,	/* Date to convert */
    int changeover)		/* Gregorian transition date as a Julian Day */
{
    Tcl_WideInt year, ym1, ym1o4, ym1o100, ym1o400;
    int month, mm1, q, r;

1553
1554
1555
1556
1557
1558
1559























































1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571

1572
1573
1574
1575
1576
1577
1578
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973

2974
2975
2976
2977
2978
2979
2980
2981







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+











-
+







		+ ym1o4;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * GetJulianDayFromEraYearDay --
 *
 *	Given era, year, and dayOfYear (in TclDateFields), and the
 *	Gregorian transition date, computes the Julian Day Number.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Stores day number in 'julianDay'
 *
 *----------------------------------------------------------------------
 */


void
GetJulianDayFromEraYearDay(
    TclDateFields *fields,	/* Date to convert */
    int changeover)		/* Gregorian transition date as a Julian Day */
{
    Tcl_WideInt year, ym1;

    /* Get absolute year number from the civil year */
    if (fields->isBce) {
	year = 1 - fields->year;
    } else {
	year = fields->year;
    }

    ym1 = year - 1;

    /* Try the Gregorian calendar first. */
    fields->gregorian = 1;
    fields->julianDay =
	1721425
	+ fields->dayOfYear
	+ ( 365 * ym1 )
	+ ( ym1 / 4 )
	- ( ym1 / 100 )
	+ ( ym1 / 400 );

    /* If the date is before the Gregorian change, use the Julian calendar. */

    if ( fields->julianDay < changeover ) {
	fields->gregorian = 0;
	fields->julianDay =
	    1721423
	    + fields->dayOfYear
	    + ( 365 * ym1 )
	    + ( ym1 / 4 );
    }
}
/*
 *----------------------------------------------------------------------
 *
 * IsGregorianLeapYear --
 *
 *	Tests whether a given year is a leap year, in either Julian or
 *	Gregorian calendar.
 *
 * Results:
 *	Returns 1 for a leap year, 0 otherwise.
 *
 *----------------------------------------------------------------------
 */

static int
int
IsGregorianLeapYear(
    TclDateFields *fields)	/* Date to test */
{
    Tcl_WideInt year = fields->year;

    if (fields->isBce) {
	year = 1 - year;
1763
1764
1765
1766
1767
1768
1769
1770

1771
1772
1773
1774
1775
1776
1777

1778
1779
1780
1781
1782
1783
1784
3166
3167
3168
3169
3170
3171
3172

3173
3174
3175
3176
3177
3178
3179

3180
3181
3182
3183
3184
3185
3186
3187







-
+






-
+







    case 2:
	if (Tcl_GetIndexFromObj(interp, objv[1], clicksSwitches, "option", 0,
		&index) != TCL_OK) {
	    return TCL_ERROR;
	}
	break;
    default:
	Tcl_WrongNumArgs(interp, 1, objv, "?-switch?");
	Tcl_WrongNumArgs(interp, 0, objv, "clock clicks ?-switch?");
	return TCL_ERROR;
    }

    switch (index) {
    case CLICKS_MILLIS:
	Tcl_GetTime(&now);
	clicks = (Tcl_WideInt)now.sec * 1000 + now.usec / 1000;
	clicks = now.sec * 1000LL + now.usec / 1000;
	break;
    case CLICKS_NATIVE:
#ifdef TCL_WIDE_CLICKS
	clicks = TclpGetWideClicks();
#else
	clicks = (Tcl_WideInt)TclpGetClicks();
#endif
1817
1818
1819
1820
1821
1822
1823
1824

1825
1826
1827
1828
1829
1830
1831
3220
3221
3222
3223
3224
3225
3226

3227
3228
3229
3230
3231
3232
3233
3234







-
+







    int objc,			/* Parameter count */
    Tcl_Obj *const *objv)	/* Parameter values */
{
    Tcl_Time now;
    Tcl_Obj *timeObj;

    if (objc != 1) {
	Tcl_WrongNumArgs(interp, 1, objv, NULL);
	Tcl_WrongNumArgs(interp, 0, objv, "clock milliseconds");
	return TCL_ERROR;
    }
    Tcl_GetTime(&now);
    TclNewUIntObj(timeObj, (Tcl_WideUInt)
	    now.sec * 1000 + now.usec / 1000);
    Tcl_SetObjResult(interp, timeObj);
    return TCL_OK;
1853
1854
1855
1856
1857
1858
1859
1860

1861
1862
1863
1864
1865
1866











1867
1868
1869
1870

1871
1872

1873




1874
1875
1876


1877
1878
1879
1880
1881
1882
1883
1884
1885

1886
1887
1888
1889
1890
1891
1892















1893
1894
1895
1896
1897
1898
1899
1900
1901



1902
1903
1904


1905
1906
1907
1908
1909
1910

1911
1912
1913
1914
1915

1916
1917
1918
1919
1920






1921
1922
1923
1924
1925
1926
1927
1928
1929
1930








1931
1932
1933
1934













1935


1936
1937
1938
1939





1940
1941

1942
1943
1944
1945
1946
1947


1948
1949
1950


1951










1952
1953










1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965



1966
1967
1968
1969




1970

















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































1971
1972
1973
1974

1975
1976





1977
1978




1979

1980
1981
1982









1983
1984
1985
1986
1987
1988
1989
3256
3257
3258
3259
3260
3261
3262

3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283

3284
3285

3286
3287
3288
3289
3290
3291
3292


3293
3294
3295




3296
3297
3298

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ClockMicrosecondsObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Parameter count */
    Tcl_Obj *const *objv)	/* Parameter values */
{
    if (objc != 1) {
	Tcl_WrongNumArgs(interp, 1, objv, NULL);
	Tcl_WrongNumArgs(interp, 0, objv, "clock microseconds");
	return TCL_ERROR;
    }
    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(TclpGetMicroseconds()));
    return TCL_OK;
}

static inline void
ClockInitFmtScnArgs(
    void *clientData,
    Tcl_Interp *interp,
    ClockFmtScnCmdArgs *opts)
{
    memset(opts, 0, sizeof(*opts));
    opts->clientData = clientData;
    opts->interp = interp;
}

/*
 *-----------------------------------------------------------------------------
 *
 * ClockParseformatargsObjCmd --
 * ClockParseFmtScnArgs --
 *
 *	Parses the arguments for [clock format].
 *	Parses the arguments for sub-commands "scan", "format" and "add".
 *
 *	Note:	common options table used here, because for the options often used
 *		the same literals (objects), so it avoids permanent "recompiling" of
 *		option object representation to indexType with another table.
 *
 * Results:
 *	Returns a standard Tcl result, whose value is a four-element list
 *	comprising the time format, the locale, and the timezone.
 *	Returns a standard Tcl result, and stores parsed options
 *	(format, the locale, timezone and base) in structure "opts".
 *
 * This function exists because the loop that parses the [clock format]
 * options is a known performance "hot spot", and is implemented in an effort
 * to speed that particular code up.
 *
 *-----------------------------------------------------------------------------
 */

static int
#define CLC_FMT_ARGS	(0)
ClockParseformatargsObjCmd(
    void *clientData,	/* Client data containing literal pool */
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Parameter count */
    Tcl_Obj *const objv[])	/* Parameter vector */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;
#define CLC_SCN_ARGS	(1 << 0)
#define CLC_ADD_ARGS	(1 << 1)

static int
ClockParseFmtScnArgs(
    ClockFmtScnCmdArgs *opts,	/* Result vector: format, locale, timezone... */
    TclDateFields      *date,	/* Extracted date-time corresponding base
				 * (by scan or add) resp. clockval (by format) */
    int objc,			/* Parameter count */
    Tcl_Obj *const objv[],	/* Parameter vector */
    int		flags,		/* Flags, differentiates between format, scan, add */
    const char *syntax		/* Syntax of the current command */
) {
    Tcl_Interp	    *interp =  opts->interp;
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;
    Tcl_Obj **litPtr = dataPtr->literals;
    Tcl_Obj *results[3];	/* Format, locale and timezone */
#define formatObj results[0]
#define localeObj results[1]
#define timezoneObj results[2]
    int gmtFlag = 0;
    static const char *const options[] = { /* Command line options expected */
	"-format",	"-gmt",		"-locale",
	"-timezone",	NULL };
    static const char *const options[] = {
	"-base", "-format", "-gmt", "-locale", "-timezone", "-validate", NULL
    };
    enum optionInd {
	CLOCK_FORMAT_FORMAT,	CLOCK_FORMAT_GMT,	CLOCK_FORMAT_LOCALE,
	CLOCK_FORMAT_TIMEZONE
	CLC_ARGS_BASE, CLC_ARGS_FORMAT, CLC_ARGS_GMT, CLC_ARGS_LOCALE,
	CLC_ARGS_TIMEZONE, CLC_ARGS_VALIDATE
    };
    int optionIndex;		/* Index of an option. */
    int saw = 0;		/* Flag == 1 if option was seen already. */
    Tcl_WideInt clockVal;	/* Clock value - just used to parse. */
    int i;

    Tcl_WideInt baseVal;	/* Base time, expressed in seconds from the Epoch */
    /*
     * Args consist of a time followed by keyword-value pairs.
     */

    if (objc < 2 || (objc % 2) != 0) {
    if ( flags & (CLC_SCN_ARGS) ) {
	Tcl_WrongNumArgs(interp, 0, objv,
		"clock format clockval ?-format string? "
		"?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?");
	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", (char *)NULL);
	return TCL_ERROR;
    	/* default flags (from configure) */
    	opts->flags |= dataPtr->defFlags & (CLF_VALIDATE);
    } else {
    	/* clock value (as current base) */
	opts->baseObj = objv[1];
	saw |= (1 << CLC_ARGS_BASE);
    }

    /*
     * Extract values for the keywords.
     */

    formatObj = litPtr[LIT__DEFAULT_FORMAT];
    localeObj = litPtr[LIT_C];
    timezoneObj = litPtr[LIT__NIL];
    for (i = 2; i < objc; i+=2) {
	/* bypass integers (offsets) by "clock add" */
	if (flags & CLC_ADD_ARGS) {
	    Tcl_WideInt num;
	    if (TclGetWideIntFromObj(NULL, objv[i], &num) == TCL_OK) {
		continue;
	    }
	}
	/* get option */
	if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
		&optionIndex) != TCL_OK) {
	    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
		    TclGetString(objv[i]), (char *)NULL);
	if (Tcl_GetIndexFromObj(interp, objv[i], options,
	    "option", 0, &optionIndex) != TCL_OK) {
	    goto badOptionMsg;
	}
	/* if already specified */
	if (saw & (1 << optionIndex)) {
	    if ( !(flags & CLC_SCN_ARGS)
	       && optionIndex == CLC_ARGS_BASE) {
		goto badOptionMsg;
	    }
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"bad option \"%s\": doubly present",
		TclGetString(objv[i]))
	    return TCL_ERROR;
	    );
	    goto badOption;
	}
	switch (optionIndex) {
	case CLOCK_FORMAT_FORMAT:
	    formatObj = objv[i+1];
	case CLC_ARGS_FORMAT:
	    if (flags & CLC_ADD_ARGS) {
		goto badOptionMsg;
	    }
	    opts->formatObj = objv[i+1];
	    break;
	case CLOCK_FORMAT_GMT:
	case CLC_ARGS_GMT:
	    if (Tcl_GetBooleanFromObj(interp, objv[i+1], &gmtFlag) != TCL_OK){
		return TCL_ERROR;
	    }
	    break;
	case CLOCK_FORMAT_LOCALE:
	    localeObj = objv[i+1];
	case CLC_ARGS_LOCALE:
	    opts->localeObj = objv[i+1];
	    break;
	case CLOCK_FORMAT_TIMEZONE:
	    timezoneObj = objv[i+1];
	case CLC_ARGS_TIMEZONE:
	    opts->timezoneObj = objv[i+1];
	    break;
	case CLC_ARGS_BASE:
	    opts->baseObj = objv[i+1];
	    break;
	case CLC_ARGS_VALIDATE:
	    if ( !(flags & CLC_SCN_ARGS) ) {
		goto badOptionMsg;
	    } else {
		int val;
		if (Tcl_GetBooleanFromObj(interp, objv[i+1], &val) != TCL_OK) {
		    return TCL_ERROR;
	}
	saw |= 1 << optionIndex;
		}
		if (val) {
		    opts->flags |= CLF_VALIDATE;
		} else {
		    opts->flags &= ~CLF_VALIDATE;
		}
	    }
	    break;
	}
	saw |= (1 << optionIndex);
    }

    /*
     * Check options.
     */

    if (TclGetWideIntFromObj(interp, objv[1], &clockVal) != TCL_OK) {
	return TCL_ERROR;
    }
    if ((saw & (1 << CLOCK_FORMAT_GMT))
	    && (saw & (1 << CLOCK_FORMAT_TIMEZONE))) {
	Tcl_SetObjResult(interp, litPtr[LIT_CANNOT_USE_GMT_AND_TIMEZONE]);
    if ((saw & (1 << CLC_ARGS_GMT))
	    && (saw & (1 << CLC_ARGS_TIMEZONE))) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("cannot use -gmt and -timezone in same call", -1));
	Tcl_SetErrorCode(interp, "CLOCK", "gmtWithTimezone", (char *)NULL);
	return TCL_ERROR;
    }
    if (gmtFlag) {
	opts->timezoneObj = dataPtr->literals[LIT_GMT];
    }
    else
    /* If time zone not specified use system time zone */
	timezoneObj = litPtr[LIT_GMT];
    if ( opts->timezoneObj == NULL
      || TclGetString(opts->timezoneObj) == NULL
      || opts->timezoneObj->length == 0
    ) {
	opts->timezoneObj = ClockGetSystemTimeZone(opts->clientData, interp);
	if (opts->timezoneObj == NULL) {
	    return TCL_ERROR;
	}
    }

    /* Setup timezone (normalize object if needed and load TZ on demand) */

    opts->timezoneObj = ClockSetupTimeZone(opts->clientData, interp, opts->timezoneObj);
    if (opts->timezoneObj == NULL) {
	return TCL_ERROR;
    }

    /* Base (by scan or add) or clock value (by format) */

    if (opts->baseObj != NULL) {
	Tcl_Obj *baseObj = opts->baseObj;
	/* bypass integer recognition if looks like option "-now" */
	if (
	    (baseObj->length == 4 && baseObj->bytes && *(baseObj->bytes+1) == 'n') ||
	    TclGetWideIntFromObj(NULL, baseObj, &baseVal) != TCL_OK
	) {

	    /* we accept "-now" as current date-time */
	    static const char *const nowOpts[] = {
		"-now", NULL
	    };
	    int idx;
	    if (Tcl_GetIndexFromObj(NULL, baseObj, nowOpts, "seconds or -now",
		    TCL_EXACT, &idx) == TCL_OK
	    ) {
		goto baseNow;
	    }

	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "expected integer but got \"%s\"",
		    Tcl_GetString(baseObj)));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "INTEGER", (char *)NULL);
	    i = 1;
	    goto badOption;
	}
	/*
	 * Seconds could be an unsigned number that overflowed. Make sure
	 * that it isn't. Additionally it may be too complex to calculate
	 * julianday etc (forwards/backwards) by too large/small values, thus
	 * just let accept a bit shorter values to avoid overflow.
	 * Note the year is currently an integer, thus avoid to overflow it also.
	 */

	if ( baseObj->typePtr == &tclBignumType
	  || baseVal < TCL_MIN_SECONDS || baseVal > TCL_MAX_SECONDS
	) {
	    Tcl_SetObjResult(interp, dataPtr->literals[LIT_INTEGER_VALUE_TOO_LARGE]);
	    return TCL_ERROR;
	}

    } else {

baseNow:
	{
	    Tcl_Time now;
	    Tcl_GetTime(&now);
	    baseVal = (Tcl_WideInt) now.sec;
	}
    }

    /*
     * Extract year, month and day from the base time for the parser to use as
     * defaults
     */

    /* check base fields already cached (by TZ, last-second cache) */
    if ( dataPtr->lastBase.timezoneObj == opts->timezoneObj
      && dataPtr->lastBase.date.seconds == baseVal
      && (!(dataPtr->lastBase.date.flags & CLF_CTZ)
	     || dataPtr->lastTZEpoch == TzsetIfNecessary())
    ) {
	memcpy(date, &dataPtr->lastBase.date, ClockCacheableDateFieldsSize);
    } else {
	/* extact fields from base */
	date->seconds = baseVal;
	if (ClockGetDateFields(opts->clientData, interp, date, opts->timezoneObj,
	      GREGORIAN_CHANGE_DATE) != TCL_OK) { /* TODO - GREGORIAN_CHANGE_DATE should be locale-dependent */
	    return TCL_ERROR;
	}
	/* cache last base */
	memcpy(&dataPtr->lastBase.date, date, ClockCacheableDateFieldsSize);
	TclSetObjRef(dataPtr->lastBase.timezoneObj, opts->timezoneObj);
    }

    return TCL_OK;

badOptionMsg:

    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	"bad option \"%s\": must be %s",
	TclGetString(objv[i]), syntax)
    );

badOption:

    Tcl_SetErrorCode(interp, "CLOCK", "badOption",
	    (i < objc) ? Tcl_GetString(objv[i]) : (char *)NULL, (char *)NULL);

    return TCL_ERROR;
}

/*----------------------------------------------------------------------
 *
 * ClockFormatObjCmd -- , clock format --
 *
 *	This function is invoked to process the Tcl "clock format" command.
 *
 *	Formats a count of seconds since the Posix Epoch as a time of day.
 *
 *	The 'clock format' command formats times of day for output.  Refer
 *	to the user documentation to see what it does.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
ClockFormatObjCmd(
    void *clientData,	/* Client data containing literal pool */
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Parameter count */
    Tcl_Obj *const objv[])	/* Parameter values */
{
    ClockClientData *dataPtr = (ClockClientData *)clientData;

    static const char *syntax = "clock format clockval|-now "
	"?-format string? "
	"?-gmt boolean? "
	"?-locale LOCALE? ?-timezone ZONE?";
    int ret;
    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
    DateFormat	    dateFmt;	/* Common structure used for formatting */

    /* even number of arguments */
    if ((objc & 1) == 1) {
	Tcl_WrongNumArgs(interp, 0, objv, syntax);
	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", (char *)NULL);
	return TCL_ERROR;
    }

    memset(&dateFmt, 0, sizeof(dateFmt));

    /*
     * Extract values for the keywords.
     */

    ClockInitFmtScnArgs(clientData, interp, &opts);
    ret = ClockParseFmtScnArgs(&opts, &dateFmt.date, objc, objv,
	    CLC_FMT_ARGS, "-format, -gmt, -locale, or -timezone");
    if (ret != TCL_OK) {
	goto done;
    }

    /* Default format */
    if (opts.formatObj == NULL) {
	opts.formatObj = dataPtr->literals[LIT__DEFAULT_FORMAT];
    }

    /* Use compiled version of Format - */

    ret = ClockFormat(&dateFmt, &opts);

done:

    TclUnsetObjRef(dateFmt.date.tzName);

    if (ret != TCL_OK) {
	return ret;
    }

    return TCL_OK;
}

/*----------------------------------------------------------------------
 *
 * ClockScanObjCmd -- , clock scan --
 *
 *	This function is invoked to process the Tcl "clock scan" command.
 *
 *	Inputs a count of seconds since the Posix Epoch as a time of day.
 *
 *	The 'clock scan' command scans times of day on input. Refer to the
 *	user documentation to see what it does.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
ClockScanObjCmd(
    void *clientData,	/* Client data containing literal pool */
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Parameter count */
    Tcl_Obj *const objv[])	/* Parameter values */
{
    static const char *syntax = "clock scan string "
	    "?-base seconds? "
	    "?-format string? "
	    "?-gmt boolean? "
	    "?-locale LOCALE? ?-timezone ZONE? ?-validate boolean?";
    int ret;
    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
    DateInfo	    yy;		/* Common structure used for parsing */
    DateInfo	   *info = &yy;

    /* even number of arguments */
    if ((objc & 1) == 1) {
	Tcl_WrongNumArgs(interp, 0, objv, syntax);
	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", (char *)NULL);
	return TCL_ERROR;
    }

    ClockInitDateInfo(&yy);

    /*
     * Extract values for the keywords.
     */

    ClockInitFmtScnArgs(clientData, interp, &opts);
    ret = ClockParseFmtScnArgs(&opts, &yy.date, objc, objv,
	    CLC_SCN_ARGS, "-base, -format, -gmt, -locale, -timezone or -validate");
    if (ret != TCL_OK) {
	goto done;
    }

    /* seconds are in localSeconds (relative base date), so reset time here */
    yyHour = yyMinutes = yySeconds = yySecondOfDay = 0; yyMeridian = MER24;

    /* If free scan */
    if (opts.formatObj == NULL) {
	/* Use compiled version of FreeScan - */

	/* [SB] TODO: Perhaps someday we'll localize the legacy code. Right now, it's not localized. */
	if (opts.localeObj != NULL) {
	    Tcl_SetObjResult(interp,
		Tcl_NewStringObj("legacy [clock scan] does not support -locale", -1));
	    Tcl_SetErrorCode(interp, "CLOCK", "flagWithLegacyFormat", (char *)NULL);
	    ret = TCL_ERROR;
	    goto done;
	}
	ret = ClockFreeScan(&yy, objv[1], &opts);
    }
    else {
	/* Use compiled version of Scan - */

	ret = ClockScan(&yy, objv[1], &opts);
    }

    if (ret != TCL_OK) {
	goto done;
    }

    /*
     * If no GMT and not free-scan (where valid stage 1 is done in-between),
     * validate with stage 1 before local time conversion, otherwise it may
     * adjust date/time tokens to valid values
     */
    if ( (opts.flags & CLF_VALIDATE_S1) &&
	 info->flags & (CLF_ASSEMBLE_SECONDS|CLF_LOCALSEC)
    ) {
	ret = ClockValidDate(&yy, &opts, CLF_VALIDATE_S1);
	if (ret != TCL_OK) {
	    goto done;
	}
    }

    /* Convert date info structure into UTC seconds */

    ret = ClockScanCommit(&yy, &opts);
    if (ret != TCL_OK) {
	goto done;
    }

    /* Apply remaining validation rules, if expected */
    if ( (opts.flags & CLF_VALIDATE) ) {
	ret = ClockValidDate(&yy, &opts, opts.flags & CLF_VALIDATE);
	if (ret != TCL_OK) {
	    goto done;
	}
    }

done:

    TclUnsetObjRef(yy.date.tzName);

    if (ret != TCL_OK) {
	return ret;
    }

    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(yy.date.seconds));
    return TCL_OK;
}

/*----------------------------------------------------------------------
 *
 * ClockScanCommit --
 *
 *	Converts date info structure into UTC seconds.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
ClockScanCommit(
    DateInfo  *info,	/* Clock scan info structure */
    ClockFmtScnCmdArgs *opts)	/* Format, locale, timezone and base */
{
    /* If needed assemble julianDay using year, month, etc. */
    if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
	if ((info->flags & CLF_ISO8601WEAK)) {
	    GetJulianDayFromEraYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
	}
	else
	if ( !(info->flags & CLF_DAYOFYEAR) /* no day of year */
	   || (info->flags & (CLF_DAYOFMONTH|CLF_MONTH)) /* yymmdd over yyddd */
		== (CLF_DAYOFMONTH|CLF_MONTH)
	) {
	    GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
	} else {
	    GetJulianDayFromEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
	}
	info->flags |= CLF_ASSEMBLE_SECONDS;
	info->flags &= ~CLF_ASSEMBLE_JULIANDAY;
    }

    /* some overflow checks */
    if (info->flags & CLF_JULIANDAY) {
	ClockClientData *dataPtr = (ClockClientData *)opts->clientData;
	double curJDN = (double)yydate.julianDay
	    + ((double)yySecondOfDay - SECONDS_PER_DAY/2) / SECONDS_PER_DAY;
	if (curJDN > dataPtr->maxJDN) {
	    Tcl_SetObjResult(opts->interp, Tcl_NewStringObj(
		"requested date too large to represent", -1));
	    Tcl_SetErrorCode(opts->interp, "CLOCK", "dateTooLarge", (char *)NULL);
	    return TCL_ERROR;
	}
    }

    /* Local seconds to UTC (stored in yydate.seconds) */

    if (info->flags & (CLF_ASSEMBLE_SECONDS)) {
	yydate.localSeconds =
	    -210866803200LL
	    + ( SECONDS_PER_DAY * yydate.julianDay )
	    + ( yySecondOfDay % SECONDS_PER_DAY );
    }

    if (info->flags & (CLF_ASSEMBLE_SECONDS|CLF_LOCALSEC)) {
	if (ConvertLocalToUTC(opts->clientData, opts->interp, &yydate,
		opts->timezoneObj, GREGORIAN_CHANGE_DATE) != TCL_OK) {
	    return TCL_ERROR;
	}
    }

    /* Increment UTC seconds with relative time */

    yydate.seconds += yyRelSeconds;

    return TCL_OK;
}

/*----------------------------------------------------------------------
 *
 * ClockValidDate --
 *
 *	Validate date info structure for wrong data (e. g. out of ranges).
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
ClockValidDate(
    DateInfo  *info,	/* Clock scan info structure */
    ClockFmtScnCmdArgs *opts,	/* Scan options */
    int stage)			/* Stage to validate (1, 2 or 3 for both) */
{
    const char *errMsg = "", *errCode = "";
    TclDateFields temp;
    int tempCpyFlg = 0;
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    #if 0
    printf("yyMonth %d, yyDay %d, yyDayOfYear %d, yyHour %d, yyMinutes %d, yySeconds %d, "
	   "yySecondOfDay %d, sec %d, daySec %d, tzOffset %d\n",
	  yyMonth, yyDay, yydate.dayOfYear, yyHour, yyMinutes, yySeconds,
	  yySecondOfDay, (int)yydate.localSeconds, (int)(yydate.localSeconds % SECONDS_PER_DAY),
	  yydate.tzOffset);
    #endif

    if (!(stage & CLF_VALIDATE_S1) || !(opts->flags & CLF_VALIDATE_S1)) {
	goto stage_2;
    }
    opts->flags &= ~CLF_VALIDATE_S1; /* stage 1 is done */

    /* first year (used later in hath / daysInPriorMonths) */
    if ((info->flags & (CLF_YEAR|CLF_ISO8601YEAR))) {
	if ((info->flags & CLF_ISO8601YEAR)) {
	    if ( yydate.iso8601Year < dataPtr->validMinYear
	      || yydate.iso8601Year > dataPtr->validMaxYear ) {
		errMsg = "invalid iso year"; errCode = "iso year"; goto error;
	    }
	}
	if (info->flags & CLF_YEAR) {
	    if ( yyYear < dataPtr->validMinYear
	      || yyYear > dataPtr->validMaxYear ) {
		errMsg = "invalid year"; errCode = "year"; goto error;
	    }
	} else if ((info->flags & CLF_ISO8601YEAR)) {
	    yyYear = yydate.iso8601Year; /* used to recognize leap */
	}
	if ((info->flags & (CLF_ISO8601YEAR|CLF_YEAR))
		== (CLF_ISO8601YEAR|CLF_YEAR)) {
	    if (yyYear != yydate.iso8601Year) {
		errMsg = "ambiguous year"; errCode = "year"; goto error;
	    }
	}
    }
    /* and month (used later in hath) */
    if (info->flags & CLF_MONTH) {
	if ( yyMonth < 1 || yyMonth > 12 ) {
	    errMsg = "invalid month"; errCode = "month"; goto error;
	}
    }
    /* day of month */
    if (info->flags & (CLF_DAYOFMONTH|CLF_DAYOFWEEK)) {
	if ( yyDay < 1 || yyDay > 31 ) {
	    errMsg = "invalid day"; errCode = "day"; goto error;
	}
	else
	if ( (info->flags & CLF_MONTH) ) {
	    const int *h = hath[IsGregorianLeapYear(&yydate)];
	    if ( yyDay > h[yyMonth-1] ) {
		errMsg = "invalid day"; goto error;
	    }
	}
    }
    if (info->flags & CLF_DAYOFYEAR) {
	if ( yydate.dayOfYear < 1
	  || yydate.dayOfYear > daysInPriorMonths[IsGregorianLeapYear(&yydate)][12] ) {
	    errMsg = "invalid day of year"; errCode = "day of year"; goto error;
	}
    }

    /* mmdd !~ ddd */
    if ((info->flags & (CLF_DAYOFYEAR|CLF_DAYOFMONTH|CLF_MONTH))
		== (CLF_DAYOFYEAR|CLF_DAYOFMONTH|CLF_MONTH)) {
	if (!tempCpyFlg) {
	    memcpy(&temp, &yydate, sizeof(temp));
	    tempCpyFlg = 1;
	}
	GetJulianDayFromEraYearDay(&temp, GREGORIAN_CHANGE_DATE);
	if (temp.julianDay != yydate.julianDay) {
	    errMsg = "ambiguous day"; errCode = "day"; goto error;
	}
    }

    if (info->flags & CLF_TIME) {
	/* hour */
	if ( yyHour < 0 || yyHour > ((yyMeridian == MER24) ? 23 : 12) ) {
	    errMsg = "invalid time (hour)"; errCode = "hour"; goto error;
	}
	/* minutes */
	if ( yyMinutes < 0 || yyMinutes > 59 ) {
	    errMsg = "invalid time (minutes)"; errCode = "minutes"; goto error;
	}
	/* oldscan could return secondOfDay (parsedTime) -1 by invalid time (ex.: 25:00:00) */
	if ( yySeconds < 0 || yySeconds > 59 || yySecondOfDay <= -1 ) {
	    errMsg = "invalid time"; errCode = "seconds"; goto error;
	}
    }

    if (!(stage & CLF_VALIDATE_S2) || !(opts->flags & CLF_VALIDATE_S2)) {
	return TCL_OK;
    }
    opts->flags &= ~CLF_VALIDATE_S2; /* stage 2 is done */

    /*
     * Further tests expected ready calculated julianDay (inclusive relative),
     * and time-zone conversion (local to UTC time).
     */
  stage_2:

    /* time, regarding the modifications by the time-zone (looks for given time
     * in between DST-time hole, so does not exist in this time-zone) */
    if (info->flags & CLF_TIME) {
	/*
	 * we don't need to do the backwards time-conversion (UTC to local) and
	 * compare results, because the after conversion (local to UTC) we
	 * should have valid localSeconds (was not invalidated to TCL_INV_SECONDS),
	 * so if it was invalidated - invalid time, outside the time-zone (in DST-hole)
	 */
	if ( yydate.localSeconds == TCL_INV_SECONDS ) {
	    errMsg = "invalid time (does not exist in this time-zone)";
	    errCode = "out-of-time"; goto error;
	}
    }

    /* day of week */
    if (info->flags & CLF_DAYOFWEEK) {
	if (!tempCpyFlg) {
	    memcpy(&temp, &yydate, sizeof(temp));
	    tempCpyFlg = 1;
	}
	GetYearWeekDay(&temp, GREGORIAN_CHANGE_DATE);
	if (temp.dayOfWeek != yyDayOfWeek) {
	    errMsg = "invalid day of week"; errCode = "day of week"; goto error;
	}
    }

    return TCL_OK;

  error:
    Tcl_SetObjResult(opts->interp,
	Tcl_ObjPrintf("unable to convert input string: %s", errMsg));
    Tcl_SetErrorCode(opts->interp, "CLOCK", "invInpStr", errCode, (char *)NULL);
    return TCL_ERROR;
}

/*----------------------------------------------------------------------
 *
 * ClockFreeScan --
 *
 *	Used by ClockScanObjCmd for free scanning without format.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
ClockFreeScan(
    DateInfo	       *info,	/* Date fields used for parsing & converting
				 * simultaneously a yy-parse structure of the
				 * TclClockFreeScan */
    Tcl_Obj *strObj,		/* String containing the time to scan */
    ClockFmtScnCmdArgs *opts)	/* Command options */
{
    Tcl_Interp	    *interp =  opts->interp;
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    int ret = TCL_ERROR;

    /*
     * Parse the date. The parser will fill a structure "info" with date,
     * time, time zone, relative month/day/seconds, relative weekday, ordinal
     * month.
     * Notice that many yy-defines point to values in the "info" or "date"
     * structure, e. g. yySecondOfDay -> info->date.secondOfDay or
     *			yyMonth -> info->date.month (same as yydate.month)
     */
    yyInput = Tcl_GetString(strObj);

    if (TclClockFreeScan(interp, info) != TCL_OK) {
	Tcl_Obj *msg;
	TclNewObj(msg);
	Tcl_AppendPrintfToObj(msg, "unable to convert date-time string \"%s\": %s",
	    Tcl_GetString(strObj), TclGetString(Tcl_GetObjResult(interp)));
	Tcl_SetObjResult(interp, msg);
	goto done;
    }

    /*
     * If the caller supplied a date in the string, update the date with
     * the value. If the caller didn't specify a time with the date, default to
     * midnight.
     */

    if (info->flags & CLF_YEAR) {
	if (yyYear < 100) {
	    if (yyYear >= dataPtr->yearOfCenturySwitch) {
		yyYear -= 100;
	    }
	    yyYear += dataPtr->currentYearCentury;
	}
	yydate.isBce = 0;
	info->flags |= CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;
    }

    /*
     * If the caller supplied a time zone in the string, make it into a time
     * zone indicator of +-hhmm and setup this time zone.
     */

    if (info->flags & CLF_ZONE) {
	if (yyTimezone || !yyDSTmode) {
	    /* Real time zone from numeric zone */
	    Tcl_Obj *tzObjStor = NULL;
	    int minEast = -yyTimezone;
	    int dstFlag = 1 - yyDSTmode;
	    tzObjStor = ClockFormatNumericTimeZone(
				60 * minEast + 3600 * dstFlag);
	    Tcl_IncrRefCount(tzObjStor);

	    opts->timezoneObj = ClockSetupTimeZone(dataPtr, interp, tzObjStor);

	    Tcl_DecrRefCount(tzObjStor);
	} else {
	    /* simplest case - GMT / UTC */
	    opts->timezoneObj = ClockSetupTimeZone(dataPtr, interp,
		dataPtr->literals[LIT_GMT]);
	}
	if (opts->timezoneObj == NULL) {
	    goto done;
	}

	// TclSetObjRef(yydate.tzName, opts->timezoneObj);

	info->flags |= CLF_ASSEMBLE_SECONDS;
    }

    /*
     * For freescan apply validation rules (stage 1) before mixed with
     * relative time (otherwise always valid recalculated date & time).
     */
    if ( (opts->flags & CLF_VALIDATE) ) {
	if (ClockValidDate(info, opts, CLF_VALIDATE_S1) != TCL_OK) {
	    goto done;
	}
    }

    /*
     * Assemble date, time, zone into seconds-from-epoch
     */

    if ((info->flags & (CLF_TIME|CLF_HAVEDATE)) == CLF_HAVEDATE) {
	yySecondOfDay = 0;
	info->flags |= CLF_ASSEMBLE_SECONDS;
    }
    else
    if (info->flags & CLF_TIME) {
	yySecondOfDay = ToSeconds(yyHour, yyMinutes,
			    yySeconds, yyMeridian);
	info->flags |= CLF_ASSEMBLE_SECONDS;
    }
    else
    if ( (info->flags & (CLF_DAYOFWEEK|CLF_HAVEDATE)) == CLF_DAYOFWEEK
	    || (info->flags & CLF_ORDINALMONTH)
	    || ( (info->flags & CLF_RELCONV)
		&& ( yyRelMonth != 0
		     || yyRelDay != 0 ) )
    ) {
	yySecondOfDay = 0;
	info->flags |= CLF_ASSEMBLE_SECONDS;
    }
    else {
	yySecondOfDay = yydate.localSeconds % SECONDS_PER_DAY;
    }

    /*
     * Do relative times
     */

    ret = ClockCalcRelTime(info);

    /* Free scanning completed - date ready */

done:

    return ret;
}

/*----------------------------------------------------------------------
 *
 * ClockCalcRelTime --
 *
 *	Used for calculating of relative times.
 *
 * Results:
 *	Returns a standard Tcl result.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */
int
ClockCalcRelTime(
    DateInfo	       *info)	/* Date fields used for converting */
{

    int prevDayOfWeek = yyDayOfWeek;	/* preserve unchanged day of week */

    /*
     * Because some calculations require in-between conversion of the
     * julian day, we can repeat this processing multiple times
     */
repeat_rel:

    if (info->flags & CLF_RELCONV) {

	/*
	 * Relative conversion normally possible in UTC time only, because
	 * of possible wrong local time increment if ignores in-between DST-hole.
	 * (see test-cases clock-34.53, clock-34.54).
	 * So increment date in julianDay, but time inside day in UTC (seconds).
	 */

	/* add months (or years in months) */

	if (yyRelMonth != 0) {
	    int m, h;

	    /* if needed extract year, month, etc. again */
	    if (info->flags & CLF_ASSEMBLE_DATE) {
		GetGregorianEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
		GetMonthDay(&yydate);
		GetYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
		info->flags &= ~CLF_ASSEMBLE_DATE;
	    }

	    /* add the requisite number of months */
	    yyMonth += yyRelMonth - 1;
	    yyYear += yyMonth / 12;
	    m = yyMonth % 12;
	    /* compiler fix for negative offs - wrap y, m = (0, -1) -> (-1, 11) */
	    if (m < 0) {
		yyYear--;
		m = 12 + m;
	    }
	    yyMonth = m + 1;

	    /* if the day doesn't exist in the current month, repair it */
	    h = hath[IsGregorianLeapYear(&yydate)][m];
	    if (yyDay > h) {
		yyDay = h;
	    }

	    /* on demand (lazy) assemble julianDay using new year, month, etc. */
	    info->flags |= CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;

	    yyRelMonth = 0;
	}

	/* add days (or other parts aligned to days) */
	if (yyRelDay) {

	    /* assemble julianDay using new year, month, etc. */
	    if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
		GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
		info->flags &= ~CLF_ASSEMBLE_JULIANDAY;
	    }
	    yydate.julianDay += yyRelDay;

	    /* julianDay was changed, on demand (lazy) extract year, month, etc. again */
	    info->flags |= CLF_ASSEMBLE_DATE|CLF_ASSEMBLE_SECONDS;

	    yyRelDay = 0;
	}

	/* relative time (seconds), if exceeds current date, do the day conversion and
	 * leave rest of the increment in yyRelSeconds to add it hereafter in UTC seconds */
	if (yyRelSeconds) {
	    Tcl_WideInt newSecs = yySecondOfDay + yyRelSeconds;

	    /* if seconds increment outside of current date, increment day */
	    if (newSecs / SECONDS_PER_DAY != yySecondOfDay / SECONDS_PER_DAY) {

		yyRelDay += newSecs / SECONDS_PER_DAY;
		yySecondOfDay = 0;
		yyRelSeconds = newSecs % SECONDS_PER_DAY;

		goto repeat_rel;
	    }
	}

	info->flags &= ~CLF_RELCONV;
    }

    /*
     * Do relative (ordinal) month
     */

    if (info->flags & CLF_ORDINALMONTH) {
	int monthDiff;

	/* if needed extract year, month, etc. again */
	if (info->flags & CLF_ASSEMBLE_DATE) {
	    GetGregorianEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);
	    GetMonthDay(&yydate);
	    GetYearWeekDay(&yydate, GREGORIAN_CHANGE_DATE);
	    info->flags &= ~CLF_ASSEMBLE_DATE;
	}

	if (yyMonthOrdinalIncr > 0) {
	    monthDiff = yyMonthOrdinal - yyMonth;
	    if (monthDiff <= 0) {
		monthDiff += 12;
	    }
	    yyMonthOrdinalIncr--;
	} else {
	    monthDiff = yyMonth - yyMonthOrdinal;
	    if (monthDiff >= 0) {
		monthDiff -= 12;
	    }
	    yyMonthOrdinalIncr++;
	}

	/* process it further via relative times */
	yyYear += yyMonthOrdinalIncr;
	yyRelMonth += monthDiff;
	info->flags &= ~CLF_ORDINALMONTH;
	info->flags |= CLF_RELCONV|CLF_ASSEMBLE_JULIANDAY|CLF_ASSEMBLE_SECONDS;

	goto repeat_rel;
    }

    /*
     * Do relative weekday
     */

    if ((info->flags & (CLF_DAYOFWEEK|CLF_HAVEDATE)) == CLF_DAYOFWEEK) {

	/* restore scanned day of week */
	yyDayOfWeek = prevDayOfWeek;

	/* if needed assemble julianDay now */
	if (info->flags & CLF_ASSEMBLE_JULIANDAY) {
	    GetJulianDayFromEraYearMonthDay(&yydate, GREGORIAN_CHANGE_DATE);
	    info->flags &= ~CLF_ASSEMBLE_JULIANDAY;
	}

	yydate.isBce = 0;
	yydate.julianDay = WeekdayOnOrBefore(yyDayOfWeek, yydate.julianDay + 6)
		    + 7 * yyDayOrdinal;
	if (yyDayOrdinal > 0) {
	    yydate.julianDay -= 7;
	}
	info->flags |= CLF_ASSEMBLE_DATE|CLF_ASSEMBLE_SECONDS;
    }

    return TCL_OK;
}


/*----------------------------------------------------------------------
 *
 * ClockWeekdaysOffs --
 *
 *	Get offset in days for the number of week days corresponding the
 *	given day of week (skipping Saturdays and Sundays).
 *
 *
 * Results:
 *	Returns a day increment adjusted the given weekdays
 *
 *----------------------------------------------------------------------
 */

static inline int
ClockWeekdaysOffs(
    int dayOfWeek,
    int offs)
{
    int weeks, resDayOfWeek;

    /* offset in days */
    weeks = offs / 5;
    offs = offs % 5;
    /* compiler fix for negative offs - wrap (0, -1) -> (-1, 4) */
    if (offs < 0) {
	weeks--;
	offs = 5 + offs;
    }
    offs += 7 * weeks;

    /* resulting day of week */
    {
	int day = (offs % 7);
	/* compiler fix for negative offs - wrap (0, -1) -> (-1, 6) */
	if (day < 0) {
	    day = 7 + day;
	}
	resDayOfWeek = dayOfWeek + day;
    }

    /* adjust if we start from a weekend */
    if (dayOfWeek > 5) {
	int adj = 5 - dayOfWeek;
	offs += adj;
	resDayOfWeek += adj;
    }

    /* adjust if we end up on a weekend */
    if (resDayOfWeek > 5) {
       offs += 2;
    }

    return offs;
}



/*----------------------------------------------------------------------
 *
 * ClockAddObjCmd -- , clock add --
 *
 *	Adds an offset to a given time.
 *
 *	Refer to the user documentation to see what it exactly does.
 *
 * Syntax:
 *   clock add clockval ?count unit?... ?-option value?
 *
 * Parameters:
 *   clockval -- Starting time value
 *   count -- Amount of a unit of time to add
 *   unit -- Unit of time to add, must be one of:
 *	     years year months month weeks week
 *	     days day hours hour minutes minute
 *	     seconds second
 *
 * Options:
 *   -gmt BOOLEAN
 *	 Flag synonymous with '-timezone :GMT'
 *   -timezone ZONE
 *	 Name of the time zone in which calculations are to be done.
 *   -locale NAME
 *	 Name of the locale in which calculations are to be done.
 *	 Used to determine the Gregorian change date.
 *
 * Results:
 *	Returns a standard Tcl result with the given time adjusted
 *	by the given offset(s) in order.
 *
 * Notes:
 *   It is possible that adding a number of months or years will adjust the
 *   day of the month as well.	For instance, the time at one month after
 *   31 January is either 28 or 29 February, because February has fewer
 *   than 31 days.
 *
 *----------------------------------------------------------------------
 */

int
ClockAddObjCmd(
    void *clientData,	/* Client data containing literal pool */
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Parameter count */
    Tcl_Obj *const objv[])	/* Parameter values */
{
    static const char *syntax = "clock add clockval|-now ?number units?..."
	"?-gmt boolean? "
	"?-locale LOCALE? ?-timezone ZONE?";
    ClockClientData *dataPtr = (ClockClientData *)clientData;
    int ret;
    ClockFmtScnCmdArgs opts;	/* Format, locale, timezone and base */
    DateInfo	    yy;		/* Common structure used for parsing */
    DateInfo	   *info = &yy;

    /* add "week" to units also (because otherwise ambiguous) */
    static const char *const units[] = {
	"years",	"months",	    "week",	    "weeks",
	"days",		"weekdays",
	"hours",	"minutes",	    "seconds",
	NULL
    };
    enum unitInd {
	CLC_ADD_YEARS,	CLC_ADD_MONTHS,	    CLC_ADD_WEEK,   CLC_ADD_WEEKS,
	CLC_ADD_DAYS,	CLC_ADD_WEEKDAYS,
	CLC_ADD_HOURS,	CLC_ADD_MINUTES,    CLC_ADD_SECONDS
    };
    int unitIndex;		/* Index of an option. */
    int i;
    Tcl_WideInt offs;

    /* even number of arguments */
    if ((objc & 1) == 1) {
	Tcl_WrongNumArgs(interp, 0, objv, syntax);
	Tcl_SetErrorCode(interp, "CLOCK", "wrongNumArgs", (char *)NULL);
	return TCL_ERROR;
    }

    ClockInitDateInfo(&yy);

    /*
     * Extract values for the keywords.
     */

    ClockInitFmtScnArgs(clientData, interp, &opts);
    ret = ClockParseFmtScnArgs(&opts, &yy.date, objc, objv,
	    CLC_ADD_ARGS, "-gmt, -locale, or -timezone");
    if (ret != TCL_OK) {
	goto done;
    }

    /* time together as seconds of the day */
    yySecondOfDay = yySeconds = yydate.localSeconds % SECONDS_PER_DAY;
    /* seconds are in localSeconds (relative base date), so reset time here */
    yyHour = 0; yyMinutes = 0; yyMeridian = MER24;

    ret = TCL_ERROR;

    /*
     * Find each offset and process date increment
     */

    for (i = 2; i < objc; i+=2) {
	/* bypass not integers (options, allready processed above in ClockParseFmtScnArgs) */
	if (TclGetWideIntFromObj(NULL, objv[i], &offs) != TCL_OK) {
	    continue;
	}
	/* get unit */
	if (Tcl_GetIndexFromObj(interp, objv[i+1], units, "unit", 0,
		&unitIndex) != TCL_OK) {
	    goto done;
	}
	if (objv[i]->typePtr == &tclBignumType
	    || offs > (unitIndex < CLC_ADD_HOURS ? 0x7fffffff : TCL_MAX_SECONDS)
	    || offs < (unitIndex < CLC_ADD_HOURS ? -0x7fffffff : TCL_MIN_SECONDS)
	) {
	    Tcl_SetObjResult(interp, dataPtr->literals[LIT_INTEGER_VALUE_TOO_LARGE]);
	    goto done;
	}

	/* nothing to do if zero quantity */
	if (!offs) {
	    continue;
	}

	/* if in-between conversion needed (already have relative date/time),
	 * correct date info, because the date may be changed,
	 * so refresh it now */

	if ( (info->flags & CLF_RELCONV)
	  && ( unitIndex == CLC_ADD_WEEKDAYS
	    /* some months can be shorter as another */
	    || yyRelMonth || yyRelDay
	    /* day changed */
	    || yySeconds + yyRelSeconds > SECONDS_PER_DAY
	    || yySeconds + yyRelSeconds < 0
	  )
	) {
	    if (ClockCalcRelTime(info) != TCL_OK) {
		goto done;
	    }
	}

	/* process increment by offset + unit */
	info->flags |= CLF_RELCONV;
	switch (unitIndex) {
	case CLC_ADD_YEARS:
	    yyRelMonth += offs * 12;
	    break;
	case CLC_ADD_MONTHS:
	    yyRelMonth += offs;
	    break;
	case CLC_ADD_WEEK:
	case CLC_ADD_WEEKS:
	    yyRelDay += offs * 7;
	    break;
	case CLC_ADD_DAYS:
	    yyRelDay += offs;
	    break;
	case CLC_ADD_WEEKDAYS:
	    /* add number of week days (skipping Saturdays and Sundays)
	     * to a relative days value. */
	    offs = ClockWeekdaysOffs(yy.date.dayOfWeek, offs);
	    yyRelDay += offs;
	    break;
	case CLC_ADD_HOURS:
	    yyRelSeconds += offs * 60 * 60;
	    break;
	case CLC_ADD_MINUTES:
	    yyRelSeconds += offs * 60;
	    break;
	case CLC_ADD_SECONDS:
	    yyRelSeconds += offs;
	    break;
	}
    }

    /*
     * Return options as a list.
     * Do relative times (if not yet already processed interim):
     */

    if (info->flags & CLF_RELCONV) {
	if (ClockCalcRelTime(info) != TCL_OK) {
	    goto done;
	}
    }
    Tcl_SetObjResult(interp, Tcl_NewListObj(3, results));
    return TCL_OK;

    /* Convert date info structure into UTC seconds */

    ret = ClockScanCommit(&yy, &opts);

done:
#undef timezoneObj
#undef localeObj
#undef formatObj

    TclUnsetObjRef(yy.date.tzName);

    if (ret != TCL_OK) {
	return ret;
    }

    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(yy.date.seconds));
    return TCL_OK;
}

/*----------------------------------------------------------------------
 *
 * ClockSecondsObjCmd -
 *
 *	Returns a count of microseconds since the epoch.
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+
+
+
+
+
+
+
+
+
+
+







    int objc,			/* Parameter count */
    Tcl_Obj *const *objv)	/* Parameter values */
{
    Tcl_Time now;
    Tcl_Obj *timeObj;

    if (objc != 1) {
	Tcl_WrongNumArgs(interp, 1, objv, NULL);
	Tcl_WrongNumArgs(interp, 0, objv, "clock seconds");
	return TCL_ERROR;
    }
    Tcl_GetTime(&now);
    TclNewUIntObj(timeObj, (Tcl_WideUInt)now.sec);

    Tcl_SetObjResult(interp, timeObj);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockSafeCatchCmd --
 *
 *	Same as "::catch" command but avoids overwriting of interp state.
 *
 *	See [554117edde] for more info (and proper solution).
 *
 *----------------------------------------------------------------------
 */
int
ClockSafeCatchCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    typedef struct {
        int status;			/* return code status */
        int flags;			/* Each remaining field saves the */
        int returnLevel;		/* corresponding field of the Interp */
        int returnCode;			/* struct. These fields taken together are */
        Tcl_Obj *errorInfo;		/* the "state" of the interp. */
        Tcl_Obj *errorCode;
        Tcl_Obj *returnOpts;
        Tcl_Obj *objResult;
        Tcl_Obj *errorStack;
        int resetErrorStack;
    } InterpState;

    Interp *iPtr = (Interp *)interp;
    int ret, flags = 0;
    InterpState *statePtr;

    if (objc == 1) {
	/* wrong # args : */
	return Tcl_CatchObjCmd(NULL, interp, objc, objv);
    }

    statePtr = (InterpState *)Tcl_SaveInterpState(interp, 0);
    if (!statePtr->errorInfo) {
	/* todo: avoid traced get of errorInfo here */
	TclInitObjRef(statePtr->errorInfo,
		Tcl_ObjGetVar2(interp, iPtr->eiVar, NULL, 0));
	flags |= ERR_LEGACY_COPY;
    }
    if (!statePtr->errorCode) {
	/* todo: avoid traced get of errorCode here */
	TclInitObjRef(statePtr->errorCode,
		Tcl_ObjGetVar2(interp, iPtr->ecVar, NULL, 0));
	flags |= ERR_LEGACY_COPY;
    }

    /* original catch */
    ret = Tcl_CatchObjCmd(NULL, interp, objc, objv);

    if (ret == TCL_ERROR) {
	Tcl_DiscardInterpState((Tcl_InterpState)statePtr);
	return TCL_ERROR;
    }
    /* overwrite result in state with catch result */
    TclSetObjRef(statePtr->objResult, Tcl_GetObjResult(interp));
    /* set result (together with restore state) to interpreter */
    (void) Tcl_RestoreInterpState(interp, (Tcl_InterpState)statePtr);
    /* todo: unless ERR_LEGACY_COPY not set in restore (branch [bug-554117edde] not merged yet) */
    iPtr->flags |= (flags & ERR_LEGACY_COPY);
    return ret;
}

/*
 *----------------------------------------------------------------------
 *
 * TzsetIfNecessary --
 *
 *	Calls the tzset() library function if the contents of the TZ
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+












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+






+


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#else
#define WCHAR char
#define wcslen strlen
#define wcscmp strcmp
#define wcscpy strcpy
#endif

static void
static size_t
TzsetIfNecessary(void)
{
    static WCHAR* tzWas = (WCHAR *)INT2PTR(-1);	 /* Previous value of TZ, protected by
					  * clockMutex. */
    static long long tzLastRefresh = 0;	 /* Used for latency before next refresh */
    static size_t tzWasEpoch = 0;        /* Epoch, signals that TZ changed */
    static size_t tzEnvEpoch = 0;        /* Last env epoch, for faster signaling,
					    that TZ changed via TCL */
    const WCHAR *tzIsNow;		 /* Current value of TZ */

    /*
     * Prevent performance regression on some platforms by resolving of system time zone:
     * small latency for check whether environment was changed (once per second)
     * no latency if environment was changed with tcl-env (compare both epoch values)
     */
    Tcl_Time now;
    Tcl_GetTime(&now);
    if (now.sec == tzLastRefresh && tzEnvEpoch == TclEnvEpoch) {
	return;
	return tzWasEpoch;
    }

    tzEnvEpoch = TclEnvEpoch;
    tzLastRefresh = now.sec;

    /* check in lock */
    Tcl_MutexLock(&clockMutex);
    tzIsNow = getenv("TCL_TZ");
    if (tzIsNow == NULL) {
    tzIsNow = getenv("TZ");
	tzIsNow = getenv("TZ");
    }
    if (tzIsNow != NULL && (tzWas == NULL || tzWas == (WCHAR *)INT2PTR(-1)
	    || wcscmp(tzIsNow, tzWas) != 0)) {
	tzset();
	if (tzWas != NULL && tzWas != (WCHAR *)INT2PTR(-1)) {
	    Tcl_Free(tzWas);
	}
	tzWas = (WCHAR *)Tcl_Alloc(sizeof(WCHAR) * (wcslen(tzIsNow) + 1));
	wcscpy(tzWas, tzIsNow);
	tzWasEpoch++;
    } else if (tzIsNow == NULL && tzWas != NULL) {
	tzset();
	if (tzWas != (WCHAR *)INT2PTR(-1)) {
	    Tcl_Free(tzWas);
	}
	tzWas = NULL;
	tzWasEpoch++;
    }
    Tcl_MutexUnlock(&clockMutex);
}


    return tzWasEpoch;
/*
 *----------------------------------------------------------------------
 *
 * ClockDeleteCmdProc --
 *
 *	Remove a reference to the clock client data, and clean up memory
 *	when it's all gone.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
ClockDeleteCmdProc(
    void *clientData)	/* Opaque pointer to the client data */
{
    ClockClientData *data = (ClockClientData *)clientData;
    int i;

    if (data->refCount-- <= 1) {
	for (i = 0; i < LIT__END; ++i) {
	    Tcl_DecrRefCount(data->literals[i]);
	}
	Tcl_Free(data->literals);
	Tcl_Free(data);
    }
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

Added generic/tclClockFmt.c.








































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
 * tclClockFmt.c --
 *
 *	Contains the date format (and scan) routines. This code is back-ported
 *	from the time and date facilities of tclSE engine, by Serg G. Brester.
 *
 * Copyright (c) 2015 by Sergey G. Brester aka sebres. All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tclInt.h"
#include "tclStrIdxTree.h"
#include "tclDate.h"

/*
 * Miscellaneous forward declarations and functions used within this file
 */

static void
ClockFmtObj_DupInternalRep(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr);
static void
ClockFmtObj_FreeInternalRep(Tcl_Obj *objPtr);
static int
ClockFmtObj_SetFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr);
static void
ClockFmtObj_UpdateString(Tcl_Obj *objPtr);


TCL_DECLARE_MUTEX(ClockFmtMutex); /* Serializes access to common format list. */

static void ClockFmtScnStorageDelete(ClockFmtScnStorage *fss);

static void ClockFrmScnFinalize(void *clientData);

/*
 * Clock scan and format facilities.
 */

/*
 *----------------------------------------------------------------------
 *
 * _str2int -- , _str2wideInt --
 *
 *	Fast inline-convertion of string to signed int or wide int by given
 *	start/end.
 *
 *	The given string should contain numbers chars only (because already
 *	pre-validated within parsing routines)
 *
 * Results:
 *	Returns a standard Tcl result.
 *	TCL_OK - by successful conversion, TCL_ERROR by (wide) int overflow
 *
 *----------------------------------------------------------------------
 */

static inline void
_str2int_no(
    int	       *out,
    const char *p,
    const char *e,
    int sign)
{
    /* assert(e <= p+10); */
    int val = 0;
    /* overflow impossible for 10 digits ("9..9"), so no needs to check at all */
    while (p < e) {			/* never overflows */
	val = val * 10 + (*p++ - '0');
    }
    if (sign < 0) { val = -val; }
    *out = val;
}

static inline void
_str2wideInt_no(
    Tcl_WideInt *out,
    const char	*p,
    const char	*e,
    int sign)
{
    /* assert(e <= p+18); */
    Tcl_WideInt val = 0;
    /* overflow impossible for 18 digits ("9..9"), so no needs to check at all */
    while (p < e) {			/* never overflows */
	val = val * 10 + (*p++ - '0');
    }
    if (sign < 0) { val = -val; }
    *out = val;
}

/* int & Tcl_WideInt overflows may happens here (expected case) */
#if defined(__GNUC__) || defined(__GNUG__)
# pragma GCC optimize("no-trapv")
#endif

static inline int
_str2int(
    int	       *out,
    const char *p,
    const char *e,
    int sign)
{
    int val = 0;
    /* overflow impossible for 10 digits ("9..9"), so no needs to check before */
    const char *eNO = p+10;
    if (eNO > e) {
	eNO = e;
    }
    while (p < eNO) {				/* never overflows */
	val = val * 10 + (*p++ - '0');
    }
    if (sign >= 0) {
	while (p < e) {				/* check for overflow */
	    int prev = val;
	    val = val * 10 + (*p++ - '0');
	    if (val / 10 < prev) {
		return TCL_ERROR;
	    }
	}
    } else {
	val = -val;
	while (p < e) {				/* check for overflow */
	    int prev = val;
	    val = val * 10 - (*p++ - '0');
	    if (val / 10 > prev) {
		return TCL_ERROR;
	    }
	}
    }
    *out = val;
    return TCL_OK;
}

static inline int
_str2wideInt(
    Tcl_WideInt *out,
    const char	*p,
    const char	*e,
    int sign)
{
    Tcl_WideInt val = 0;
    /* overflow impossible for 18 digits ("9..9"), so no needs to check before */
    const char *eNO = p+18;
    if (eNO > e) {
	eNO = e;
    }
    while (p < eNO) {				/* never overflows */
	val = val * 10 + (*p++ - '0');
    }
    if (sign >= 0) {
	while (p < e) {				/* check for overflow */
	    Tcl_WideInt prev = val;
	    val = val * 10 + (*p++ - '0');
	    if (val / 10 < prev) {
		return TCL_ERROR;
	    }
	}
    } else {
	val = -val;
	while (p < e) {				/* check for overflow */
	    Tcl_WideInt prev = val;
	    val = val * 10 - (*p++ - '0');
	    if (val / 10 > prev) {
		return TCL_ERROR;
	    }
	}
    }
    *out = val;
    return TCL_OK;
}

int
TclAtoWIe(
    Tcl_WideInt *out,
    const char	*p,
    const char	*e,
    int sign)
{
    return _str2wideInt(out, p, e, sign);
}

#if defined(__GNUC__) || defined(__GNUG__)
# pragma GCC reset_options
#endif

/*
 *----------------------------------------------------------------------
 *
 * _itoaw -- , _witoaw --
 *
 *	Fast inline-convertion of signed int or wide int to string, using
 *	given padding with specified padchar and width (or without padding).
 *
 *	This is a very fast replacement for sprintf("%02d").
 *
 * Results:
 *	Returns position in buffer after end of conversion result.
 *
 *----------------------------------------------------------------------
 */

static inline char *
_itoaw(
    char *buf,
    int val,
    char  padchar,
    unsigned short int width)
{
    char *p;
    static int wrange[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};

    /* positive integer */

    if (val >= 0)
    {
	/* check resp. recalculate width */
	while (width <= 9 && val >= wrange[width]) {
	    width++;
	}
	/* number to string backwards */
	p = buf + width;
	*p-- = '\0';
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' + c;
	} while (val > 0);
	/* fulling with pad-char */
	while (p >= buf) {
	    *p-- = padchar;
	}

	return buf + width;
    }
    /* negative integer */

    if (!width) width++;
    /* check resp. recalculate width (regarding sign) */
    width--;
    while (width <= 9 && val <= -wrange[width]) {
	width++;
    }
    width++;
    /* number to string backwards */
    p = buf + width;
    *p-- = '\0';
    /* differentiate platforms with -1 % 10 == 1 and -1 % 10 == -1 */
    if (-1 % 10 == -1) {
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' - c;
	} while (val < 0);
    } else {
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' + c;
	} while (val < 0);
    }
    /* sign by 0 padding */
    if (padchar != '0') { *p-- = '-'; }
    /* fulling with pad-char */
    while (p >= buf + 1) {
	*p-- = padchar;
    }
    /* sign by non 0 padding */
    if (padchar == '0') { *p = '-'; }

    return buf + width;
}
char *
TclItoAw(
    char *buf,
    int val,
    char  padchar,
    unsigned short int width)
{
    return _itoaw(buf, val, padchar, width);
}

static inline char *
_witoaw(
    char *buf,
    Tcl_WideInt val,
    char  padchar,
    unsigned short int width)
{
    char *p;
    static int wrange[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000};

    /* positive integer */

    if (val >= 0)
    {
	/* check resp. recalculate width */
	if (val >= 10000000000LL) {
	    Tcl_WideInt val2;
	    val2 = val / 10000000000LL;
	    while (width <= 9 && val2 >= wrange[width]) {
		width++;
	    }
	    width += 10;
	} else {
	    while (width <= 9 && val >= wrange[width]) {
		width++;
	    }
	}
	/* number to string backwards */
	p = buf + width;
	*p-- = '\0';
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' + c;
	} while (val > 0);
	/* fulling with pad-char */
	while (p >= buf) {
	    *p-- = padchar;
	}

	return buf + width;
    }

    /* negative integer */

    if (!width) width++;
    /* check resp. recalculate width (regarding sign) */
    width--;
    if (val <= -10000000000LL) {
	Tcl_WideInt val2;
	val2 = val / 10000000000LL;
	while (width <= 9 && val2 <= -wrange[width]) {
	    width++;
	}
	width += 10;
    } else {
	while (width <= 9 && val <= -wrange[width]) {
	    width++;
	}
    }
    width++;
    /* number to string backwards */
    p = buf + width;
    *p-- = '\0';
    /* differentiate platforms with -1 % 10 == 1 and -1 % 10 == -1 */
    if (-1 % 10 == -1) {
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' - c;
	} while (val < 0);
    } else {
	do {
	    char c = (val % 10); val /= 10;
	    *p-- = '0' + c;
	} while (val < 0);
    }
    /* sign by 0 padding */
    if (padchar != '0') { *p-- = '-'; }
    /* fulling with pad-char */
    while (p >= buf + 1) {
	*p-- = padchar;
    }
    /* sign by non 0 padding */
    if (padchar == '0') { *p = '-'; }

    return buf + width;
}

/*
 * Global GC as LIFO for released scan/format object storages.
 *
 * Used to holds last released CLOCK_FMT_SCN_STORAGE_GC_SIZE formats
 * (after last reference from Tcl-object will be removed). This is helpful
 * to avoid continuous (re)creation and compiling by some dynamically resp.
 * variable format objects, that could be often reused.
 *
 * As long as format storage is used resp. belongs to GC, it takes place in
 * FmtScnHashTable also.
 */

#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0

static struct {
    ClockFmtScnStorage	  *stackPtr;
    ClockFmtScnStorage	  *stackBound;
    unsigned int	   count;
} ClockFmtScnStorage_GC = {NULL, NULL, 0};

/*
 *----------------------------------------------------------------------
 *
 * ClockFmtScnStorageGC_In --
 *
 *	Adds an format storage object to GC.
 *
 *	If current GC is full (size larger as CLOCK_FMT_SCN_STORAGE_GC_SIZE)
 *	this removes last unused storage at begin of GC stack (LIFO).
 *
 *	Assumes caller holds the ClockFmtMutex.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static inline void
ClockFmtScnStorageGC_In(ClockFmtScnStorage *entry)
{
    /* add new entry */
    TclSpliceIn(entry, ClockFmtScnStorage_GC.stackPtr);
    if (ClockFmtScnStorage_GC.stackBound == NULL) {
	ClockFmtScnStorage_GC.stackBound = entry;
    }
    ClockFmtScnStorage_GC.count++;

    /* if GC ist full */
    if (ClockFmtScnStorage_GC.count > CLOCK_FMT_SCN_STORAGE_GC_SIZE) {

	/* GC stack is LIFO: delete first inserted entry */
	ClockFmtScnStorage *delEnt = ClockFmtScnStorage_GC.stackBound;
	ClockFmtScnStorage_GC.stackBound = delEnt->prevPtr;
	TclSpliceOut(delEnt, ClockFmtScnStorage_GC.stackPtr);
	ClockFmtScnStorage_GC.count--;
	delEnt->prevPtr = delEnt->nextPtr = NULL;
	/* remove it now */
	ClockFmtScnStorageDelete(delEnt);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ClockFmtScnStorage_GC_Out --
 *
 *	Restores (for reusing) given format storage object from GC.
 *
 *	Assumes caller holds the ClockFmtMutex.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static inline void
ClockFmtScnStorage_GC_Out(ClockFmtScnStorage *entry)
{
    TclSpliceOut(entry, ClockFmtScnStorage_GC.stackPtr);
    ClockFmtScnStorage_GC.count--;
    if (ClockFmtScnStorage_GC.stackBound == entry) {
	ClockFmtScnStorage_GC.stackBound = entry->prevPtr;
    }
    entry->prevPtr = entry->nextPtr = NULL;
}

#endif


/*
 * Global format storage hash table of type ClockFmtScnStorageHashKeyType
 * (contains list of scan/format object storages, shared across all threads).
 *
 * Used for fast searching by format string.
 */
static Tcl_HashTable FmtScnHashTable;
static int	     initialized = 0;

/*
 * Wrappers between pointers to hash entry and format storage object
 */
static inline Tcl_HashEntry *
HashEntry4FmtScn(ClockFmtScnStorage *fss) {
    return (Tcl_HashEntry*)(fss + 1);
};
static inline ClockFmtScnStorage *
FmtScn4HashEntry(Tcl_HashEntry *hKeyPtr) {
    return (ClockFmtScnStorage*)(((char*)hKeyPtr) - sizeof(ClockFmtScnStorage));
};

/*
 *----------------------------------------------------------------------
 *
 * ClockFmtScnStorageAllocProc --
 *
 *	Allocate space for a hash entry containing format storage together
 *	with the string key.
 *
 * Results:
 *	The return value is a pointer to the created entry.
 *
 *----------------------------------------------------------------------
 */

static Tcl_HashEntry *
ClockFmtScnStorageAllocProc(
    TCL_UNUSED(Tcl_HashTable *),	/* Hash table. */
    void *keyPtr)		/* Key to store in the hash table entry. */
{
    ClockFmtScnStorage *fss;
    const char *string = (const char *) keyPtr;
    Tcl_HashEntry *hPtr;
    unsigned int size,
	allocsize = sizeof(ClockFmtScnStorage) + sizeof(Tcl_HashEntry);

    allocsize += (size = strlen(string) + 1);
    if (size > sizeof(hPtr->key)) {
	allocsize -= sizeof(hPtr->key);
    }

    fss = (ClockFmtScnStorage *)Tcl_Alloc(allocsize);

    /* initialize */
    memset(fss, 0, sizeof(*fss));

    hPtr = HashEntry4FmtScn(fss);
    memcpy(&hPtr->key.string, string, size);
    hPtr->clientData = 0; /* currently unused */

    return hPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockFmtScnStorageFreeProc --
 *
 *	Free format storage object and space of given hash entry.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
ClockFmtScnStorageFreeProc(
    Tcl_HashEntry *hPtr)
{
    ClockFmtScnStorage *fss = FmtScn4HashEntry(hPtr);

    if (fss->scnTok != NULL) {
	Tcl_Free(fss->scnTok);
	fss->scnTok = NULL;
	fss->scnTokC = 0;
    }
    if (fss->fmtTok != NULL) {
	Tcl_Free(fss->fmtTok);
	fss->fmtTok = NULL;
	fss->fmtTokC = 0;
    }

    Tcl_Free(fss);
}

/*
 *----------------------------------------------------------------------
 *
 * ClockFmtScnStorageDelete --
 *
 *	Delete format storage object.
 *
 * Results:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
ClockFmtScnStorageDelete(ClockFmtScnStorage *fss) {
    Tcl_HashEntry   *hPtr = HashEntry4FmtScn(fss);
    /*
     * This will delete a hash entry and call "Tcl_Free" for storage self, if
     * some additionally handling required, freeEntryProc can be used instead
     */
    Tcl_DeleteHashEntry(hPtr);
}


/*
 * Derivation of tclStringHashKeyType with another allocEntryProc
 */

static Tcl_HashKeyType ClockFmtScnStorageHashKeyType;


/*
 * Type definition of clock-format tcl object type.
 */

static const Tcl_ObjType ClockFmtObjType = {
    "clock-format",	       /* name */
    ClockFmtObj_FreeInternalRep, /* freeIntRepProc */
    ClockFmtObj_DupInternalRep,	 /* dupIntRepProc */
    ClockFmtObj_UpdateString,	 /* updateStringProc */
    ClockFmtObj_SetFromAny,	 /* setFromAnyProc */
    TCL_OBJTYPE_V0
};

#define ObjClockFmtScn(objPtr) \
    (*((ClockFmtScnStorage **)&(objPtr)->internalRep.twoPtrValue.ptr1))

#define ObjLocFmtKey(objPtr) \
    (*((Tcl_Obj **)&(objPtr)->internalRep.twoPtrValue.ptr2))

static void
ClockFmtObj_DupInternalRep(
    Tcl_Obj *srcPtr,
    Tcl_Obj *copyPtr)
{
    ClockFmtScnStorage *fss = ObjClockFmtScn(srcPtr);

    if (fss != NULL) {
	Tcl_MutexLock(&ClockFmtMutex);
	fss->objRefCount++;
	Tcl_MutexUnlock(&ClockFmtMutex);
    }

    ObjClockFmtScn(copyPtr) = fss;
    /* regards special case - format not localizable */
    if (ObjLocFmtKey(srcPtr) != srcPtr) {
	TclInitObjRef(ObjLocFmtKey(copyPtr), ObjLocFmtKey(srcPtr));
    } else {
	ObjLocFmtKey(copyPtr) = copyPtr;
    }
    copyPtr->typePtr = &ClockFmtObjType;


    /* if no format representation, dup string representation */
    if (fss == NULL) {
	copyPtr->bytes = (char *)Tcl_Alloc(srcPtr->length + 1);
	memcpy(copyPtr->bytes, srcPtr->bytes, srcPtr->length + 1);
	copyPtr->length = srcPtr->length;
    }
}

static void
ClockFmtObj_FreeInternalRep(
    Tcl_Obj *objPtr)
{
    ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);
    if (fss != NULL) {
	Tcl_MutexLock(&ClockFmtMutex);
	/* decrement object reference count of format/scan storage */
	if (--fss->objRefCount <= 0) {
	    #if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
	      /* don't remove it right now (may be reusable), just add to GC */
	      ClockFmtScnStorageGC_In(fss);
	    #else
	      /* remove storage (format representation) */
	      ClockFmtScnStorageDelete(fss);
	    #endif
	}
	Tcl_MutexUnlock(&ClockFmtMutex);
    }
    ObjClockFmtScn(objPtr) = NULL;
    if (ObjLocFmtKey(objPtr) != objPtr) {
	TclUnsetObjRef(ObjLocFmtKey(objPtr));
    } else {
	ObjLocFmtKey(objPtr) = NULL;
    }
    objPtr->typePtr = NULL;
};

static int
ClockFmtObj_SetFromAny(
    TCL_UNUSED(Tcl_Interp *),
    Tcl_Obj    *objPtr)
{
    /* validate string representation before free old internal representation */
    (void)TclGetString(objPtr);

    /* free old internal representation */
    if (objPtr->typePtr && objPtr->typePtr->freeIntRepProc)
	objPtr->typePtr->freeIntRepProc(objPtr);

    /* initial state of format object */
    ObjClockFmtScn(objPtr) = NULL;
    ObjLocFmtKey(objPtr) = NULL;
    objPtr->typePtr = &ClockFmtObjType;

    return TCL_OK;
};

static void
ClockFmtObj_UpdateString(
    Tcl_Obj  *objPtr)
{
    const char *name = "UNKNOWN";
    size_t len;
    ClockFmtScnStorage *fss = ObjClockFmtScn(objPtr);

    if (fss != NULL) {
	Tcl_HashEntry *hPtr = HashEntry4FmtScn(fss);
	name = hPtr->key.string;
    }
    len = strlen(name);
    objPtr->length = len++,
    objPtr->bytes = (char *)Tcl_Alloc(len);
    if (objPtr->bytes) {
	memcpy(objPtr->bytes, name, len);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ClockFrmObjGetLocFmtKey --
 *
 *	Retrieves format key object used to search localized format.
 *
 *	This is normally stored in second pointer of internal representation.
 *	If format object is not localizable, it is equal the given format
 *	pointer (special case to fast fallback by not-localizable formats).
 *
 * Results:
 *	Returns tcl object with key or format object if not localizable.
 *
 * Side effects:
 * 	Converts given format object to ClockFmtObjType on demand for caching
 *	the key inside its internal representation.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj*
ClockFrmObjGetLocFmtKey(
    Tcl_Interp *interp,
    Tcl_Obj    *objPtr)
{
    Tcl_Obj *keyObj;

    if (objPtr->typePtr != &ClockFmtObjType) {
	if (ClockFmtObj_SetFromAny(interp, objPtr) != TCL_OK) {
	    return NULL;
	}
    }

    keyObj = ObjLocFmtKey(objPtr);
    if (keyObj) {
	return keyObj;
    }

    keyObj = Tcl_ObjPrintf("FMT_%s", TclGetString(objPtr));
    TclInitObjRef(ObjLocFmtKey(objPtr), keyObj);

    return keyObj;
}

/*
 *----------------------------------------------------------------------
 *
 * FindOrCreateFmtScnStorage --
 *
 *	Retrieves format storage for given string format.
 *
 *	This will find the given format in the global storage hash table
 *	or create a format storage object on demaind and save the
 *	reference in the first pointer of internal representation of given
 *	object.
 *
 * Results:
 *	Returns scan/format storage pointer to ClockFmtScnStorage.
 *
 * Side effects:
 * 	Converts given format object to ClockFmtObjType on demand for caching
 *	the format storage reference inside its internal representation.
 *	Increments objRefCount of the ClockFmtScnStorage reference.
 *
 *----------------------------------------------------------------------
 */

static ClockFmtScnStorage *
FindOrCreateFmtScnStorage(
    Tcl_Interp *interp,
    Tcl_Obj    *objPtr)
{
    const char *strFmt = TclGetString(objPtr);
    ClockFmtScnStorage *fss = NULL;
    int isNew;
    Tcl_HashEntry *hPtr;

    Tcl_MutexLock(&ClockFmtMutex);

    /* if not yet initialized */
    if (!initialized) {
	/* initialize type */
	memcpy(&ClockFmtScnStorageHashKeyType, &tclStringHashKeyType, sizeof(tclStringHashKeyType));
	ClockFmtScnStorageHashKeyType.allocEntryProc = ClockFmtScnStorageAllocProc;
	ClockFmtScnStorageHashKeyType.freeEntryProc = ClockFmtScnStorageFreeProc;

	/* initialize hash table */
	Tcl_InitCustomHashTable(&FmtScnHashTable, TCL_CUSTOM_TYPE_KEYS,
	    &ClockFmtScnStorageHashKeyType);

	initialized = 1;
	Tcl_CreateExitHandler(ClockFrmScnFinalize, NULL);
    }

    /* get or create entry (and alocate storage) */
    hPtr = Tcl_CreateHashEntry(&FmtScnHashTable, strFmt, &isNew);
    if (hPtr != NULL) {

	fss = FmtScn4HashEntry(hPtr);

	#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
	  /* unlink if it is currently in GC */
	  if (isNew == 0 && fss->objRefCount == 0) {
	      ClockFmtScnStorage_GC_Out(fss);
	  }
	#endif

	/* new reference, so increment in lock right now */
	fss->objRefCount++;

	ObjClockFmtScn(objPtr) = fss;
    }

    Tcl_MutexUnlock(&ClockFmtMutex);

    if (fss == NULL && interp != NULL) {
	Tcl_AppendResult(interp, "retrieve clock format failed \"",
	    strFmt ? strFmt : "", "\"", NULL);
	Tcl_SetErrorCode(interp, "TCL", "EINVAL", (char *)NULL);
    }

    return fss;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_GetClockFrmScnFromObj --
 *
 *	Returns a clock format/scan representation of (*objPtr), if possible.
 *	If something goes wrong, NULL is returned, and if interp is non-NULL,
 *	an error message is written there.
 *
 * Results:
 *	Valid representation of type ClockFmtScnStorage.
 *
 * Side effects:
 *	Caches the ClockFmtScnStorage reference as the internal rep of (*objPtr)
 *	and in global hash table, shared across all threads.
 *
 *----------------------------------------------------------------------
 */

ClockFmtScnStorage *
Tcl_GetClockFrmScnFromObj(
    Tcl_Interp *interp,
    Tcl_Obj *objPtr)
{
    ClockFmtScnStorage *fss;

    if (objPtr->typePtr != &ClockFmtObjType) {
	if (ClockFmtObj_SetFromAny(interp, objPtr) != TCL_OK) {
	    return NULL;
	}
    }

    fss = ObjClockFmtScn(objPtr);

    if (fss == NULL) {
	fss = FindOrCreateFmtScnStorage(interp, objPtr);
    }

    return fss;
}
/*
 *----------------------------------------------------------------------
 *
 * ClockLocalizeFormat --
 *
 *	Wrap the format object in options to the localized format,
 *	corresponding given locale.
 *
 *	This searches localized format in locale catalog, and if not yet
 *	exists, it executes ::tcl::clock::LocalizeFormat in given interpreter
 *	and caches its result in the locale catalog.
 *
 * Results:
 *	Localized format object.
 *
 * Side effects:
 *	Caches the localized format inside locale catalog.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
ClockLocalizeFormat(
    ClockFmtScnCmdArgs *opts)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;
    Tcl_Obj *valObj = NULL, *keyObj;

    keyObj = ClockFrmObjGetLocFmtKey(opts->interp, opts->formatObj);

    /* special case - format object is not localizable */
    if (keyObj == opts->formatObj) {
	return opts->formatObj;
    }

    /* prevents loss of key object if the format object (where key stored)
     * becomes changed (loses its internal representation during evals) */
    Tcl_IncrRefCount(keyObj);

    if (opts->mcDictObj == NULL) {
	ClockMCDict(opts);
	if (opts->mcDictObj == NULL)
	    goto done;
    }

    /* try to find in cache within locale mc-catalog */
    if (Tcl_DictObjGet(NULL, opts->mcDictObj,
	    keyObj, &valObj) != TCL_OK) {
	goto done;
    }

    /* call LocalizeFormat locale format fmtkey */
    if (valObj == NULL) {
	Tcl_Obj *callargs[4];
	callargs[0] = dataPtr->literals[LIT_LOCALIZE_FORMAT];
	callargs[1] = opts->localeObj;
	callargs[2] = opts->formatObj;
	callargs[3] = opts->mcDictObj;
	if (Tcl_EvalObjv(opts->interp, 4, callargs, 0) == TCL_OK
	) {
	    valObj = Tcl_GetObjResult(opts->interp);
	}

	/* ensure mcDictObj remains unshared */
	if (opts->mcDictObj->refCount > 1) {
	    /* smart reference (shared dict as object with no ref-counter) */
	    opts->mcDictObj = TclDictObjSmartRef(opts->interp,
		opts->mcDictObj);
	}
	if (!valObj) {
	    goto done;
	}
	/* cache it inside mc-dictionary (this incr. ref count of keyObj/valObj) */
	if (Tcl_DictObjPut(opts->interp, opts->mcDictObj,
		keyObj, valObj) != TCL_OK
	) {
	    valObj = NULL;
	    goto done;
	}

	Tcl_ResetResult(opts->interp);

	/* check special case - format object is not localizable */
	if (valObj == opts->formatObj) {
	    /* mark it as unlocalizable, by setting self as key (without refcount incr) */
	    if (valObj->typePtr == &ClockFmtObjType) {
		TclUnsetObjRef(ObjLocFmtKey(valObj));
		ObjLocFmtKey(valObj) = valObj;
	    }
	}
    }

done:

    TclUnsetObjRef(keyObj);
    return (opts->formatObj = valObj);
}

/*
 *----------------------------------------------------------------------
 *
 * FindTokenBegin --
 *
 *	Find begin of given scan token in string, corresponding token type.
 *
 * Results:
 *	Position of token inside string if found. Otherwise - end of string.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static const char *
FindTokenBegin(
    const char *p,
    const char *end,
    ClockScanToken *tok)
{
    char c;
    if (p < end) {
	/* next token a known token type */
	switch (tok->map->type) {
	case CTOKT_INT:
	case CTOKT_WIDE:
	    /* should match at least one digit */
	    while (!isdigit(UCHAR(*p)) && (p = Tcl_UtfNext(p)) < end) {};
	    return p;
	break;
	case CTOKT_WORD:
	    c = *(tok->tokWord.start);
	    /* should match at least to the first char of this word */
	    while (*p != c && (p = Tcl_UtfNext(p)) < end) {};
	    return p;
	break;
	case CTOKT_SPACE:
	    while (!isspace(UCHAR(*p)) && (p = Tcl_UtfNext(p)) < end) {};
	    return p;
	break;
	case CTOKT_CHAR:
	    c = *((char *)tok->map->data);
	    while (*p != c && (p = Tcl_UtfNext(p)) < end) {};
	    return p;
	break;
	}
    }
    return p;
}

/*
 *----------------------------------------------------------------------
 *
 * DetermineGreedySearchLen --
 *
 *	Determine min/max lengths as exact as possible (speed, greedy match).
 *
 * Results:
 *	None. Lengths are stored in *minLenPtr, *maxLenPtr.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

static void
DetermineGreedySearchLen(
    DateInfo *info, ClockScanToken *tok,
    int *minLenPtr, int *maxLenPtr)
{
    int minLen = tok->map->minSize;
    int maxLen;
    const char *p = yyInput + minLen,
			*end = info->dateEnd;

    /* if still tokens available, try to correct minimum length */
    if ((tok+1)->map) {
	end -= tok->endDistance + yySpaceCount;
	/* find position of next known token */
	p = FindTokenBegin(p, end, tok+1);
	if (p < end) {
	    minLen = p - yyInput;
	}
    }

    /* max length to the end regarding distance to end (min-width of following tokens) */
    maxLen = end - yyInput;
    /* several amendments */
    if (maxLen > tok->map->maxSize) {
	maxLen = tok->map->maxSize;
    };
    if (minLen < tok->map->minSize) {
	minLen = tok->map->minSize;
    }
    if (minLen > maxLen) {
	maxLen = minLen;
    }
    if (maxLen > info->dateEnd - yyInput) {
	maxLen = info->dateEnd - yyInput;
    }

    /* check digits rigth now */
    if (tok->map->type == CTOKT_INT || tok->map->type == CTOKT_WIDE) {
	p = yyInput;
	end = p + maxLen;
	if (end > info->dateEnd) { end = info->dateEnd; };
	while (isdigit(UCHAR(*p)) && p < end) { p++; };
	maxLen = p - yyInput;
    }

    /* try to get max length more precise for greedy match,
     * check the next ahead token available there */
    if (minLen < maxLen && tok->lookAhTok) {
	ClockScanToken *laTok = tok + tok->lookAhTok + 1;
	p = yyInput + maxLen;
	/* regards all possible spaces here (because they are optional) */
	end = p + tok->lookAhMax + yySpaceCount + 1;
	if (end > info->dateEnd) {
	    end = info->dateEnd;
	}
	p += tok->lookAhMin;
	if (laTok->map && p < end) {
	    const char *f;
	    /* try to find laTok between [lookAhMin, lookAhMax] */
	    while (minLen < maxLen) {
		f = FindTokenBegin(p, end, laTok);
		/* if found (not below lookAhMax) */
		if (f < end) {
		    break;
		}
		/* try again with fewer length */
		maxLen--;
		p--;
		end--;
	    }
	} else if (p > end) {
	    maxLen -= (p - end);
	    if (maxLen < minLen) {
		maxLen = minLen;
	    }
	}
    }

    *minLenPtr = minLen;
    *maxLenPtr = maxLen;
}

/*
 *----------------------------------------------------------------------
 *
 * ObjListSearch --
 *
 *	Find largest part of the input string from start regarding min and
 *	max lengths in the given list (utf-8, case sensitive).
 *
 * Results:
 *	TCL_OK - match found, TCL_RETURN - not matched, TCL_ERROR in error case.
 *
 * Side effects:
 *	Input points to end of the found token in string.
 *
 *----------------------------------------------------------------------
 */

static inline int
ObjListSearch(
    DateInfo *info, int *val,
    Tcl_Obj **lstv, Tcl_Size lstc,
    int minLen, int maxLen)
{
    Tcl_Size i, l, lf = -1;
    const char *s, *f, *sf;
    /* search in list */
    for (i = 0; i < lstc; i++) {
	s = TclGetStringFromObj(lstv[i], &l);

	if ( l >= minLen
	  && (f = TclUtfFindEqualNC(yyInput, yyInput + maxLen, s, s + l, &sf)) > yyInput
	) {
	    l = f - yyInput;
	    if (l < minLen) {
		continue;
	    }
	    /* found, try to find longest value (greedy search) */
	    if (l < maxLen && minLen != maxLen) {
		lf = i;
		minLen = l + 1;
		continue;
	    }
	    /* max possible - end of search */
	    *val = i;
	    yyInput += l;
	    break;
	}
    }

    /* if found */
    if (i < lstc) {
	return TCL_OK;
    }
    if (lf >= 0) {
	*val = lf;
	yyInput += minLen - 1;
	return TCL_OK;
    }
    return TCL_RETURN;
}
#if 0
/* currently unused */

static int
LocaleListSearch(ClockFmtScnCmdArgs *opts,
    DateInfo *info, int mcKey, int *val,
    int minLen, int maxLen)
{
    Tcl_Obj **lstv;
    Tcl_Size lstc;
    Tcl_Obj *valObj;

    /* get msgcat value */
    valObj = ClockMCGet(opts, mcKey);
    if (valObj == NULL) {
	return TCL_ERROR;
    }

    /* is a list */
    if (TclListObjGetElements(opts->interp, valObj, &lstc, &lstv) != TCL_OK) {
	return TCL_ERROR;
    }

    /* search in list */
    return ObjListSearch(info, val, lstv, lstc,
	minLen, maxLen);
}
#endif

/*
 *----------------------------------------------------------------------
 *
 * ClockMCGetListIdxTree --
 *
 *	Retrieves localized string indexed tree in the locale catalog for
 *	given literal index mcKey (and builds it on demand).
 *
 *	Searches localized index in locale catalog, and if not yet exists,
 *	creates string indexed tree and stores it in the locale catalog.
 *
 * Results:
 *	Localized string index tree.
 *
 * Side effects:
 *	Caches the localized string index tree inside locale catalog.
 *
 *----------------------------------------------------------------------
 */

static TclStrIdxTree *
ClockMCGetListIdxTree(
    ClockFmtScnCmdArgs *opts,
    int	 mcKey)
{
    TclStrIdxTree * idxTree;
    Tcl_Obj *objPtr = ClockMCGetIdx(opts, mcKey);
    if ( objPtr != NULL
      && (idxTree = TclStrIdxTreeGetFromObj(objPtr)) != NULL
    ) {
	return idxTree;

    } else {
	/* build new index */

	Tcl_Obj **lstv;
	Tcl_Size lstc;
	Tcl_Obj *valObj;

	objPtr = TclStrIdxTreeNewObj();
	if ((idxTree = TclStrIdxTreeGetFromObj(objPtr)) == NULL) {
	    goto done; /* unexpected, but ...*/
	}

	valObj = ClockMCGet(opts, mcKey);
	if (valObj == NULL) {
	    goto done;
	}

	if (TclListObjGetElements(opts->interp, valObj,
		&lstc, &lstv) != TCL_OK) {
	    goto done;
	};

	if (TclStrIdxTreeBuildFromList(idxTree, lstc, lstv, NULL) != TCL_OK) {
	    goto done;
	}

	ClockMCSetIdx(opts, mcKey, objPtr);
	objPtr = NULL;
    };

done:
    if (objPtr) {
	Tcl_DecrRefCount(objPtr);
	idxTree = NULL;
    }

    return idxTree;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockMCGetMultiListIdxTree --
 *
 *	Retrieves localized string indexed tree in the locale catalog for
 *	multiple lists by literal indices mcKeys (and builds it on demand).
 *
 *	Searches localized index in locale catalog for mcKey, and if not
 *	yet exists, creates string indexed tree and stores it in the
 *	locale catalog.
 *
 * Results:
 *	Localized string index tree.
 *
 * Side effects:
 *	Caches the localized string index tree inside locale catalog.
 *
 *----------------------------------------------------------------------
 */

static TclStrIdxTree *
ClockMCGetMultiListIdxTree(
    ClockFmtScnCmdArgs *opts,
    int	 mcKey,
    int *mcKeys)
{
    TclStrIdxTree * idxTree;
    Tcl_Obj *objPtr = ClockMCGetIdx(opts, mcKey);
    if ( objPtr != NULL
      && (idxTree = TclStrIdxTreeGetFromObj(objPtr)) != NULL
    ) {
	return idxTree;

    } else {
	/* build new index */

	Tcl_Obj **lstv;
	Tcl_Size	  lstc;
	Tcl_Obj *valObj;

	objPtr = TclStrIdxTreeNewObj();
	if ((idxTree = TclStrIdxTreeGetFromObj(objPtr)) == NULL) {
	    goto done; /* unexpected, but ...*/
	}

	while (*mcKeys) {

	    valObj = ClockMCGet(opts, *mcKeys);
	    if (valObj == NULL) {
		goto done;
	    }

	    if (TclListObjGetElements(opts->interp, valObj,
		    &lstc, &lstv) != TCL_OK) {
		goto done;
	    };

	    if (TclStrIdxTreeBuildFromList(idxTree, lstc, lstv, NULL) != TCL_OK) {
		goto done;
	    }
	    mcKeys++;
	}

	ClockMCSetIdx(opts, mcKey, objPtr);
	objPtr = NULL;
    };

done:
    if (objPtr) {
	Tcl_DecrRefCount(objPtr);
	idxTree = NULL;
    }

    return idxTree;
}

/*
 *----------------------------------------------------------------------
 *
 * ClockStrIdxTreeSearch --
 *
 *	Find largest part of the input string from start regarding lengths
 *	in the given localized string indexed tree (utf-8, case sensitive).
 *
 * Results:
 *	TCL_OK - match found and the index stored in *val,
 *	TCL_RETURN - not matched or ambigous,
 * 	TCL_ERROR - in error case.
 *
 * Side effects:
 *	Input points to end of the found token in string.
 *
 *----------------------------------------------------------------------
 */

static inline int
ClockStrIdxTreeSearch(
    DateInfo *info, TclStrIdxTree *idxTree, int *val,
    int minLen, int maxLen)
{
    const char *f;
    TclStrIdx  *foundItem;
    f = TclStrIdxTreeSearch(NULL, &foundItem, idxTree,
	    yyInput, yyInput + maxLen);

    if (f <= yyInput || (f - yyInput) < minLen) {
	/* not found */
	return TCL_RETURN;
    }
    if (!foundItem->value) {
	/* ambigous */
	return TCL_RETURN;
    }

    *val = PTR2INT(foundItem->value);

    /* shift input pointer */
    yyInput = f;

    return TCL_OK;
}
#if 0
/* currently unused */

static int
StaticListSearch(ClockFmtScnCmdArgs *opts,
    DateInfo *info, const char **lst, int *val)
{
    size_t len;
    const char **s = lst;
    while (*s != NULL) {
	len = strlen(*s);
	if ( len <= info->dateEnd - yyInput
	  && strncasecmp(yyInput, *s, len) == 0
	) {
	    *val = (s - lst);
	    yyInput += len;
	    break;
	}
	s++;
    }
    if (*s != NULL) {
	return TCL_OK;
    }
    return TCL_RETURN;
}
#endif

static inline const char *
FindWordEnd(
    ClockScanToken *tok,
    const char * p, const char * end)
{
    const char *x = tok->tokWord.start;
    const char *pfnd = p;
    if (x == tok->tokWord.end - 1) { /* fast phase-out for single char word */
	if (*p == *x) {
	    return ++p;
	}
    }
    /* multi-char word */
    x = TclUtfFindEqualNC(x, tok->tokWord.end, p, end, &pfnd);
    if (x < tok->tokWord.end) {
	/* no match -> error */
	return NULL;
    }
    return pfnd;
}

static int
ClockScnToken_Month_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
#if 0
/* currently unused, test purposes only */
    static const char * months[] = {
	/* full */
	"January", "February", "March",
	"April",   "May",      "June",
	"July",	   "August",   "September",
	"October", "November", "December",
	/* abbr */
	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
	NULL
    };
    int val;
    if (StaticListSearch(opts, info, months, &val) != TCL_OK) {
	return TCL_RETURN;
    }
    yyMonth = (val % 12) + 1;
    return TCL_OK;
#endif

    static int monthsKeys[] = {MCLIT_MONTHS_FULL, MCLIT_MONTHS_ABBREV, 0};

    int ret, val;
    int minLen, maxLen;
    TclStrIdxTree *idxTree;

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    /* get or create tree in msgcat dict */

    idxTree = ClockMCGetMultiListIdxTree(opts, MCLIT_MONTHS_COMB, monthsKeys);
    if (idxTree == NULL) {
	return TCL_ERROR;
    }

    ret = ClockStrIdxTreeSearch(info, idxTree, &val, minLen, maxLen);
    if (ret != TCL_OK) {
	return ret;
    }

    yyMonth = val;
    return TCL_OK;

}

static int
ClockScnToken_DayOfWeek_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
    static int dowKeys[] = {MCLIT_DAYS_OF_WEEK_ABBREV, MCLIT_DAYS_OF_WEEK_FULL, 0};

    int ret, val;
    int minLen, maxLen;
    char curTok = *tok->tokWord.start;
    TclStrIdxTree *idxTree;

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    /* %u %w %Ou %Ow */
    if ( curTok != 'a' && curTok != 'A'
      && ((minLen <= 1 && maxLen >= 1) || PTR2INT(tok->map->data))
    ) {

	val = -1;

	if (PTR2INT(tok->map->data) == 0) {
	    if (*yyInput >= '0' && *yyInput <= '9') {
		val = *yyInput - '0';
	    }
	} else {
	    idxTree = ClockMCGetListIdxTree(opts, PTR2INT(tok->map->data) /* mcKey */);
	    if (idxTree == NULL) {
		return TCL_ERROR;
	    }

	    ret = ClockStrIdxTreeSearch(info, idxTree, &val, minLen, maxLen);
	    if (ret != TCL_OK) {
		return ret;
	    }
	    --val;
	}

	if (val != -1) {
	    if (val == 0) {
		val = 7;
	    }
	    if (val > 7) {
		Tcl_SetObjResult(opts->interp, Tcl_NewStringObj("day of week is greater than 7", -1));
		Tcl_SetErrorCode(opts->interp, "CLOCK", "badDayOfWeek", (char *)NULL);
		return TCL_ERROR;
	    }
	    info->date.dayOfWeek = val;
	    yyInput++;
	    return TCL_OK;
	}


	return TCL_RETURN;
    }

    /* %a %A */
    idxTree = ClockMCGetMultiListIdxTree(opts, MCLIT_DAYS_OF_WEEK_COMB, dowKeys);
    if (idxTree == NULL) {
	return TCL_ERROR;
    }

    ret = ClockStrIdxTreeSearch(info, idxTree, &val, minLen, maxLen);
    if (ret != TCL_OK) {
	return ret;
    }
    --val;

    if (val == 0) {
	val = 7;
    }
    info->date.dayOfWeek = val;
    return TCL_OK;

}

static int
ClockScnToken_amPmInd_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
    int ret, val;
    int minLen, maxLen;
    Tcl_Obj *amPmObj[2];

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    amPmObj[0] = ClockMCGet(opts, MCLIT_AM);
    amPmObj[1] = ClockMCGet(opts, MCLIT_PM);

    if (amPmObj[0] == NULL || amPmObj[1] == NULL) {
	return TCL_ERROR;
    }

    ret = ObjListSearch(info, &val, amPmObj, 2,
	minLen, maxLen);
    if (ret != TCL_OK) {
	return ret;
    }

    if (val == 0) {
	yyMeridian = MERam;
    } else {
	yyMeridian = MERpm;
    }

    return TCL_OK;
}

static int
ClockScnToken_LocaleERA_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;

    int ret, val;
    int minLen, maxLen;
    Tcl_Obj *eraObj[6];

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    eraObj[0] = ClockMCGet(opts, MCLIT_BCE);
    eraObj[1] = ClockMCGet(opts, MCLIT_CE);
    eraObj[2] = dataPtr->mcLiterals[MCLIT_BCE2];
    eraObj[3] = dataPtr->mcLiterals[MCLIT_CE2];
    eraObj[4] = dataPtr->mcLiterals[MCLIT_BCE3];
    eraObj[5] = dataPtr->mcLiterals[MCLIT_CE3];

    if (eraObj[0] == NULL || eraObj[1] == NULL) {
	return TCL_ERROR;
    }

    ret = ObjListSearch(info, &val, eraObj, 6,
	minLen, maxLen);
    if (ret != TCL_OK) {
	return ret;
    }

    if (val & 1) {
	yydate.isBce = 0;
    } else {
	yydate.isBce = 1;
    }

    return TCL_OK;
}

static int
ClockScnToken_LocaleListMatcher_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
    int ret, val;
    int minLen, maxLen;
    TclStrIdxTree *idxTree;

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    /* get or create tree in msgcat dict */

    idxTree = ClockMCGetListIdxTree(opts, PTR2INT(tok->map->data) /* mcKey */);
    if (idxTree == NULL) {
	return TCL_ERROR;
    }

    ret = ClockStrIdxTreeSearch(info, idxTree, &val, minLen, maxLen);
    if (ret != TCL_OK) {
	return ret;
    }

    if (tok->map->offs > 0) {
	*(int *)(((char *)info) + tok->map->offs) = --val;
    }

    return TCL_OK;
}

static int
ClockScnToken_JDN_Proc(TCL_UNUSED(ClockFmtScnCmdArgs *),
    DateInfo *info, ClockScanToken *tok)
{
    int minLen, maxLen;
    const char *p = yyInput, *end; const char *s;
    Tcl_WideInt intJD; int fractJD = 0, fractJDDiv = 1;

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    end = yyInput + maxLen;

    /* currently positive astronomic dates only */
    if (*p == '+' || *p == '-') { p++; };
    s = p;
    while (p < end && isdigit(UCHAR(*p))) {
	p++;
    }
    if ( _str2wideInt(&intJD, s, p, (*yyInput != '-' ? 1 : -1)) != TCL_OK) {
	return TCL_RETURN;
    };
    yyInput = p;
    if (p >= end || *p++ != '.') { /* allow pure integer JDN */
	/* by astronomical JD the seconds of day offs is 12 hours */
	if (tok->map->offs) {
	    goto done;
	}
	/* calendar JD */
	yydate.julianDay = intJD;
	return TCL_OK;
    }
    s = p;
    while (p < end && isdigit(UCHAR(*p))) {
    	fractJDDiv *= 10;
	p++;
    }
    if ( _str2int(&fractJD, s, p, 1) != TCL_OK) {
	return TCL_RETURN;
    };
    yyInput = p;

done:
    /*
     * Build a date from julian day (integer and fraction).
     * Note, astronomical JDN starts at noon in opposite to calendar julianday.
     */

    fractJD = (int)tok->map->offs /* 0 for calendar or 43200 for astro JD */
	+ (int)((Tcl_WideInt)SECONDS_PER_DAY * fractJD / fractJDDiv);
    if (fractJD > SECONDS_PER_DAY) {
	fractJD %= SECONDS_PER_DAY;
	intJD += 1;
    }
    yydate.secondOfDay = fractJD;
    yydate.julianDay = intJD;

    yydate.seconds =
	-210866803200LL
	+ ( SECONDS_PER_DAY * intJD )
	+ ( fractJD );

    info->flags |= CLF_POSIXSEC;

    return TCL_OK;
}

static int
ClockScnToken_TimeZone_Proc(ClockFmtScnCmdArgs *opts,
    DateInfo *info, ClockScanToken *tok)
{
    int minLen, maxLen;
    int len = 0;
    const char *p = yyInput;
    Tcl_Obj *tzObjStor = NULL;

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    /* numeric timezone */
    if (*p == '+' || *p == '-') {
	/* max chars in numeric zone = "+00:00:00" */
    #define MAX_ZONE_LEN 9
	char buf[MAX_ZONE_LEN + 1];
	char *bp = buf;
	*bp++ = *p++; len++;
	if (maxLen > MAX_ZONE_LEN)
	    maxLen = MAX_ZONE_LEN;
	/* cumulate zone into buf without ':' */
	while (len + 1 < maxLen) {
	    if (!isdigit(UCHAR(*p))) break;
	    *bp++ = *p++; len++;
	    if (!isdigit(UCHAR(*p))) break;
	    *bp++ = *p++; len++;
	    if (len + 2 < maxLen) {
		if (*p == ':') {
		    p++; len++;
		}
	    }
	}
	*bp = '\0';

	if (len < minLen) {
	    return TCL_RETURN;
	}
    #undef MAX_ZONE_LEN

	/* timezone */
	tzObjStor = Tcl_NewStringObj(buf, bp-buf);
    } else {
	/* legacy (alnum) timezone like CEST, etc. */
	if (maxLen > 4)
	    maxLen = 4;
	while (len < maxLen) {
	    if ( (*p & 0x80)
	      || (!isalpha(UCHAR(*p)) && !isdigit(UCHAR(*p)))
	    ) {	      /* INTL: ISO only. */
		break;
	    }
	    p++; len++;
	}

	if (len < minLen) {
	    return TCL_RETURN;
	}

	/* timezone */
	tzObjStor = Tcl_NewStringObj(yyInput, p-yyInput);

	/* convert using dict */
    }

    /* try to apply new time zone */
    Tcl_IncrRefCount(tzObjStor);

    opts->timezoneObj = ClockSetupTimeZone(opts->clientData, opts->interp,
	tzObjStor);

    Tcl_DecrRefCount(tzObjStor);
    if (opts->timezoneObj == NULL) {
	return TCL_ERROR;
    }

    yyInput += len;

    return TCL_OK;
}

static int
ClockScnToken_StarDate_Proc(TCL_UNUSED(ClockFmtScnCmdArgs *),
    DateInfo *info, ClockScanToken *tok)
{
    int minLen, maxLen;
    const char *p = yyInput, *end; const char *s;
    int year, fractYear, fractDayDiv, fractDay;
    static const char *stardatePref = "stardate ";

    DetermineGreedySearchLen(info, tok, &minLen, &maxLen);

    end = yyInput + maxLen;

    /* stardate string */
    p = TclUtfFindEqualNCInLwr(p, end, stardatePref, stardatePref + 9, &s);
    if (p >= end || p - yyInput < 9) {
	return TCL_RETURN;
    }
    /* bypass spaces */
    while (p < end && isspace(UCHAR(*p))) {
	p++;
    }
    if (p >= end) {
	return TCL_RETURN;
    }
    /* currently positive stardate only */
    if (*p == '+') { p++; };
    s = p;
    while (p < end && isdigit(UCHAR(*p))) {
	p++;
    }
    if (p >= end || p - s < 4) {
	return TCL_RETURN;
    }
    if ( _str2int(&year, s, p-3, 1) != TCL_OK
      || _str2int(&fractYear, p-3, p, 1) != TCL_OK) {
	return TCL_RETURN;
    };
    if (*p++ != '.') {
	return TCL_RETURN;
    }
    s = p;
    fractDayDiv = 1;
    while (p < end && isdigit(UCHAR(*p))) {
	fractDayDiv *= 10;
	p++;
    }
    if ( _str2int(&fractDay, s, p, 1) != TCL_OK) {
	return TCL_RETURN;
    };
    yyInput = p;

    /* Build a date from year and fraction. */

    yydate.year = year + RODDENBERRY;
    yydate.isBce = 0;
    yydate.gregorian = 1;

    if (IsGregorianLeapYear(&yydate)) {
	fractYear *= 366;
    } else {
	fractYear *= 365;
    }
    yydate.dayOfYear = fractYear / 1000 + 1;
    if (fractYear % 1000 >= 500) {
	yydate.dayOfYear++;
    }

    GetJulianDayFromEraYearDay(&yydate, GREGORIAN_CHANGE_DATE);

    yydate.localSeconds =
	-210866803200LL
	+ ( SECONDS_PER_DAY * yydate.julianDay )
	+ ( SECONDS_PER_DAY * fractDay / fractDayDiv );

    return TCL_OK;
}

static const char *ScnSTokenMapIndex =
    "dmbyYHMSpJjCgGVazUsntQ";
static ClockScanTokenMap ScnSTokenMap[] = {
    /* %d %e */
    {CTOKT_INT, CLF_DAYOFMONTH, 0, 1, 2, offsetof(DateInfo, date.dayOfMonth),
	NULL, NULL},
    /* %m %N */
    {CTOKT_INT, CLF_MONTH, 0, 1, 2, offsetof(DateInfo, date.month),
	NULL, NULL},
    /* %b %B %h */
    {CTOKT_PARSER, CLF_MONTH, 0, 0, 0xffff, 0,
	    ClockScnToken_Month_Proc, NULL},
    /* %y */
    {CTOKT_INT, CLF_YEAR, 0, 1, 2, offsetof(DateInfo, date.year),
	NULL, NULL},
    /* %Y */
    {CTOKT_INT, CLF_YEAR | CLF_CENTURY, 0, 4, 4, offsetof(DateInfo, date.year),
	NULL, NULL},
    /* %H %k %I %l */
    {CTOKT_INT, CLF_TIME, 0, 1, 2, offsetof(DateInfo, date.hour),
	NULL, NULL},
    /* %M */
    {CTOKT_INT, CLF_TIME, 0, 1, 2, offsetof(DateInfo, date.minutes),
	NULL, NULL},
    /* %S */
    {CTOKT_INT, CLF_TIME, 0, 1, 2, offsetof(DateInfo, date.secondOfMin),
	NULL, NULL},
    /* %p %P */
    {CTOKT_PARSER, 0, 0, 0, 0xffff, 0,
	ClockScnToken_amPmInd_Proc, NULL},
    /* %J */
    {CTOKT_WIDE, CLF_JULIANDAY | CLF_SIGNED, 0, 1, 0xffff, offsetof(DateInfo, date.julianDay),
	NULL, NULL},
    /* %j */
    {CTOKT_INT, CLF_DAYOFYEAR, 0, 1, 3, offsetof(DateInfo, date.dayOfYear),
	NULL, NULL},
    /* %C */
    {CTOKT_INT, CLF_CENTURY|CLF_ISO8601CENTURY, 0, 1, 2, offsetof(DateInfo, dateCentury),
	NULL, NULL},
    /* %g */
    {CTOKT_INT, CLF_ISO8601YEAR, 0, 2, 2, offsetof(DateInfo, date.iso8601Year),
	NULL, NULL},
    /* %G */
    {CTOKT_INT, CLF_ISO8601YEAR | CLF_ISO8601CENTURY, 0, 4, 4, offsetof(DateInfo, date.iso8601Year),
	NULL, NULL},
    /* %V */
    {CTOKT_INT, CLF_ISO8601WEAK, 0, 1, 2, offsetof(DateInfo, date.iso8601Week),
	NULL, NULL},
    /* %a %A %u %w */
    {CTOKT_PARSER, CLF_DAYOFWEEK, 0, 0, 0xffff, 0,
	ClockScnToken_DayOfWeek_Proc, NULL},
    /* %z %Z */
    {CTOKT_PARSER, CLF_OPTIONAL, 0, 0, 0xffff, 0,
	ClockScnToken_TimeZone_Proc, NULL},
    /* %U %W */
    {CTOKT_INT, CLF_OPTIONAL, 0, 1, 2, 0, /* currently no capture, parse only token */
	NULL, NULL},
    /* %s */
    {CTOKT_WIDE, CLF_POSIXSEC | CLF_SIGNED, 0, 1, 0xffff, offsetof(DateInfo, date.seconds),
	NULL, NULL},
    /* %n */
    {CTOKT_CHAR, 0, 0, 1, 1, 0, NULL, "\n"},
    /* %t */
    {CTOKT_CHAR, 0, 0, 1, 1, 0, NULL, "\t"},
    /* %Q */
    {CTOKT_PARSER, CLF_LOCALSEC, 0, 16, 30, 0,
	ClockScnToken_StarDate_Proc, NULL},
};
static const char *ScnSTokenMapAliasIndex[2] = {
    "eNBhkIlPAuwZW",
    "dmbbHHHpaaazU"
};

static const char *ScnETokenMapIndex =
    "EJjys";
static ClockScanTokenMap ScnETokenMap[] = {
    /* %EE */
    {CTOKT_PARSER, 0, 0, 0, 0xffff, offsetof(DateInfo, date.year),
	ClockScnToken_LocaleERA_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %EJ */
    {CTOKT_PARSER, CLF_JULIANDAY | CLF_SIGNED, 0, 1, 0xffff, 0, /* calendar JDN starts at midnight */
	ClockScnToken_JDN_Proc, NULL},
    /* %Ej */
    {CTOKT_PARSER, CLF_JULIANDAY | CLF_SIGNED, 0, 1, 0xffff, (SECONDS_PER_DAY/2), /* astro JDN starts at noon */
	ClockScnToken_JDN_Proc, NULL},
    /* %Ey */
    {CTOKT_PARSER, 0, 0, 0, 0xffff, 0, /* currently no capture, parse only token */
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Es */
    {CTOKT_WIDE, CLF_LOCALSEC | CLF_SIGNED, 0, 1, 0xffff, offsetof(DateInfo, date.localSeconds),
	NULL, NULL},
};
static const char *ScnETokenMapAliasIndex[2] = {
    "",
    ""
};

static const char *ScnOTokenMapIndex =
    "dmyHMSu";
static ClockScanTokenMap ScnOTokenMap[] = {
    /* %Od %Oe */
    {CTOKT_PARSER, CLF_DAYOFMONTH, 0, 0, 0xffff, offsetof(DateInfo, date.dayOfMonth),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Om */
    {CTOKT_PARSER, CLF_MONTH, 0, 0, 0xffff, offsetof(DateInfo, date.month),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Oy */
    {CTOKT_PARSER, CLF_YEAR, 0, 0, 0xffff, offsetof(DateInfo, date.year),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OH %Ok %OI %Ol */
    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, offsetof(DateInfo, date.hour),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OM */
    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, offsetof(DateInfo, date.minutes),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OS */
    {CTOKT_PARSER, CLF_TIME, 0, 0, 0xffff, offsetof(DateInfo, date.secondOfMin),
	ClockScnToken_LocaleListMatcher_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Ou Ow */
    {CTOKT_PARSER, CLF_DAYOFWEEK, 0, 0, 0xffff, 0,
	ClockScnToken_DayOfWeek_Proc, (void *)MCLIT_LOCALE_NUMERALS},
};
static const char *ScnOTokenMapAliasIndex[2] = {
    "ekIlw",
    "dHHHu"
};

/* Token map reserved for CTOKT_SPACE */
static ClockScanTokenMap ScnSpaceTokenMap = {
    CTOKT_SPACE,  0, 0, 1, 1, 0,
	NULL, NULL
};

static ClockScanTokenMap ScnWordTokenMap = {
    CTOKT_WORD,	   0, 0, 1, 1, 0,
	NULL, NULL
};


static inline unsigned int
EstimateTokenCount(
    const char *fmt,
    const char *end)
{
    const char *p = fmt;
    unsigned int tokcnt;
    /* estimate token count by % char and format length */
    tokcnt = 0;
    while (p <= end) {
	if (*p++ == '%') {
	    tokcnt++;
	    p++;
	}
    }
    p = fmt + tokcnt * 2;
    if (p < end) {
	if ((unsigned int)(end - p) < tokcnt) {
	    tokcnt += (end - p);
	} else {
	    tokcnt += tokcnt;
	}
    }
    return ++tokcnt;
}

#define AllocTokenInChain(tok, chain, tokCnt, type) \
    if (++(tok) >= (chain) + (tokCnt)) { \
	chain = (type)Tcl_Realloc((char *)(chain), \
	    (tokCnt + CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE) * sizeof(*(tok))); \
	if ((chain) == NULL) { goto done; }; \
	(tok) = (chain) + (tokCnt); \
	(tokCnt) += CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE; \
    } \
    memset(tok, 0, sizeof(*(tok)));

/*
 *----------------------------------------------------------------------
 */
ClockFmtScnStorage *
ClockGetOrParseScanFormat(
    Tcl_Interp *interp,		/* Tcl interpreter */
    Tcl_Obj    *formatObj)	/* Format container */
{
    ClockFmtScnStorage *fss;

    fss = Tcl_GetClockFrmScnFromObj(interp, formatObj);
    if (fss == NULL) {
	return NULL;
    }

    /* if format (scnTok) already tokenized */
    if (fss->scnTok != NULL) {
	return fss;
    }

    Tcl_MutexLock(&ClockFmtMutex);

    /* first time scanning - tokenize format */
    if (fss->scnTok == NULL) {
	ClockScanToken *tok, *scnTok;
	unsigned int tokCnt;
	const char *p, *e, *cp;

	e = p = HashEntry4FmtScn(fss)->key.string;
	e += strlen(p);

	/* estimate token count by % char and format length */
	fss->scnTokC = EstimateTokenCount(p, e);

	fss->scnSpaceCount = 0;

	scnTok = tok = (ClockScanToken *)Tcl_Alloc(sizeof(*tok) * fss->scnTokC);
	memset(tok, 0, sizeof(*(tok)));
	tokCnt = 1;
	while (p < e) {
	    switch (*p) {
	    case '%':
	    if (1) {
		ClockScanTokenMap * scnMap = ScnSTokenMap;
		const char *mapIndex =	ScnSTokenMapIndex,
			  **aliasIndex = ScnSTokenMapAliasIndex;
		if (p+1 >= e) {
		    goto word_tok;
		}
		p++;
		/* try to find modifier: */
		switch (*p) {
		case '%':
		    /* begin new word token - don't join with previous word token,
		     * because current mapping should be "...%%..." -> "...%..." */
		    tok->map = &ScnWordTokenMap;
		    tok->tokWord.start = p;
		    tok->tokWord.end = p+1;
		    AllocTokenInChain(tok, scnTok, fss->scnTokC, ClockScanToken *); tokCnt++;
		    p++;
		    continue;
		break;
		case 'E':
		    scnMap = ScnETokenMap,
		    mapIndex =	ScnETokenMapIndex,
		    aliasIndex = ScnETokenMapAliasIndex;
		    p++;
		break;
		case 'O':
		    scnMap = ScnOTokenMap,
		    mapIndex = ScnOTokenMapIndex,
		    aliasIndex = ScnOTokenMapAliasIndex;
		    p++;
		break;
		}
		/* search direct index */
		cp = strchr(mapIndex, *p);
		if (!cp || *cp == '\0') {
		    /* search wrapper index (multiple chars for same token) */
		    cp = strchr(aliasIndex[0], *p);
		    if (!cp || *cp == '\0') {
			p--; if (scnMap != ScnSTokenMap) p--;
			goto word_tok;
		    }
		    cp = strchr(mapIndex, aliasIndex[1][cp - aliasIndex[0]]);
		    if (!cp || *cp == '\0') { /* unexpected, but ... */
		    #ifdef DEBUG
			Tcl_Panic("token \"%c\" has no map in wrapper resolver", *p);
		    #endif
			p--; if (scnMap != ScnSTokenMap) p--;
			goto word_tok;
		    }
		}
		tok->map = &scnMap[cp - mapIndex];
		tok->tokWord.start = p;

		/* calculate look ahead value by standing together tokens */
		if (tok > scnTok) {
		    ClockScanToken     *prevTok = tok - 1;

		    while (prevTok >= scnTok) {
			if (prevTok->map->type != tok->map->type) {
			    break;
			}
			prevTok->lookAhMin += tok->map->minSize;
			prevTok->lookAhMax += tok->map->maxSize;
			prevTok->lookAhTok++;
			prevTok--;
		    }
		}

		/* increase space count used in format */
		if ( tok->map->type == CTOKT_CHAR
		  && isspace(UCHAR(*((char *)tok->map->data)))
		) {
		    fss->scnSpaceCount++;
		}

		/* next token */
		AllocTokenInChain(tok, scnTok, fss->scnTokC, ClockScanToken *); tokCnt++;
		p++;
		continue;
	    }
	    break;
	    default:
	    if ( *p == ' ' || isspace(UCHAR(*p)) ) {
		tok->map = &ScnSpaceTokenMap;
		tok->tokWord.start = p++;
		while (p < e && isspace(UCHAR(*p))) {
		    p++;
		}
		tok->tokWord.end = p;
		/* increase space count used in format */
		fss->scnSpaceCount++;
		/* next token */
		AllocTokenInChain(tok, scnTok, fss->scnTokC, ClockScanToken *); tokCnt++;
		continue;
	    }
word_tok:
	    if (1) {
		ClockScanToken	 *wordTok = tok;
		if (tok > scnTok && (tok-1)->map == &ScnWordTokenMap) {
		    wordTok = tok-1;
		}
		/* new word token */
		if (wordTok == tok) {
		    wordTok->tokWord.start = p;
		    wordTok->map = &ScnWordTokenMap;
		    AllocTokenInChain(tok, scnTok, fss->scnTokC, ClockScanToken *); tokCnt++;
		}
		if (isspace(UCHAR(*p))) {
		    fss->scnSpaceCount++;
		}
		p = Tcl_UtfNext(p);
		wordTok->tokWord.end = p;
	    }
	    break;
	    }
	}

	/* calculate end distance value for each tokens */
	if (tok > scnTok) {
	    unsigned int	endDist = 0;
	    ClockScanToken     *prevTok = tok-1;

	    while (prevTok >= scnTok) {
		prevTok->endDistance = endDist;
		if (prevTok->map->type != CTOKT_WORD) {
		    endDist += prevTok->map->minSize;
		} else {
		    endDist += prevTok->tokWord.end - prevTok->tokWord.start;
		}
		prevTok--;
	    }
	}

	/* correct count of real used tokens and free mem if desired
	 * (1 is acceptable delta to prevent memory fragmentation) */
	if (fss->scnTokC > tokCnt + (CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE / 2)) {
	    if ( (tok = (ClockScanToken *)Tcl_Realloc(scnTok, tokCnt * sizeof(*tok))) != NULL ) {
		scnTok = tok;
	    }
	}

	/* now we're ready - assign now to storage (note the threaded race condition) */
	fss->scnTok = scnTok;
	fss->scnTokC = tokCnt;
    }
done:
    Tcl_MutexUnlock(&ClockFmtMutex);

    return fss;
}

/*
 *----------------------------------------------------------------------
 */
int
ClockScan(
    DateInfo *info,	/* Date fields used for parsing & converting */
    Tcl_Obj *strObj,		/* String containing the time to scan */
    ClockFmtScnCmdArgs *opts)	/* Command options */
{
    ClockClientData *dataPtr = (ClockClientData *)opts->clientData;
    ClockFmtScnStorage	*fss;
    ClockScanToken	*tok;
    ClockScanTokenMap	*map;
    const char *p, *x, *end;
    unsigned short int	 flags = 0;
    int ret = TCL_ERROR;

    /* get localized format */
    if (ClockLocalizeFormat(opts) == NULL) {
	return TCL_ERROR;
    }

    if ( !(fss = ClockGetOrParseScanFormat(opts->interp, opts->formatObj))
      || !(tok = fss->scnTok)
    ) {
	return TCL_ERROR;
    }

    /* prepare parsing */

    yyMeridian = MER24;

    p = TclGetString(strObj);
    end = p + strObj->length;
    /* in strict mode - bypass spaces at begin / end only (not between tokens) */
    if (opts->flags & CLF_STRICT) {
	while (p < end && isspace(UCHAR(*p))) {
	    p++;
	}
    }
    yyInput = p;
    /* look ahead to count spaces (bypass it by count length and distances) */
    x = end;
    while (p < end) {
	if (isspace(UCHAR(*p))) {
	    x = ++p; /* after first space in space block */
	    yySpaceCount++;
	    while (p < end && isspace(UCHAR(*p))) {
		p++;
		yySpaceCount++;
	    }
	    continue;
	}
	x = end;
	p++;
    }
    /* ignore more as 1 space at end */
    yySpaceCount -= (end - x);
    end = x;
    /* ignore mandatory spaces used in format */
    yySpaceCount -= fss->scnSpaceCount;
    if (yySpaceCount < 0) {
	yySpaceCount = 0;
    }
    info->dateStart = p = yyInput;
    info->dateEnd = end;

    /* parse string */
    for (; tok->map != NULL; tok++) {
	map = tok->map;
	/* bypass spaces at begin of input before parsing each token */
	if ( !(opts->flags & CLF_STRICT)
	  && ( map->type != CTOKT_SPACE
	    && map->type != CTOKT_WORD
	    && map->type != CTOKT_CHAR )
	) {
	    while (p < end && isspace(UCHAR(*p))) {
		yySpaceCount--;
		p++;
	    }
	}
	yyInput = p;
	/* end of input string */
	if (p >= end) {
	    break;
	}
	switch (map->type)
	{
	case CTOKT_INT:
	case CTOKT_WIDE:
	if (1) {
	    int minLen, size;
	    int sign = 1;
	    if (map->flags & CLF_SIGNED) {
		if (*p == '+') { yyInput = ++p; }
		else
		if (*p == '-') { yyInput = ++p; sign = -1; };
	    }

	    DetermineGreedySearchLen(info, tok, &minLen, &size);

	    if (size < map->minSize) {
		/* missing input -> error */
		if ((map->flags & CLF_OPTIONAL)) {
		    continue;
		}
		goto not_match;
	    }
	    /* string 2 number, put number into info structure by offset */
	    if (map->offs) {
		p = yyInput; x = p + size;
		if (map->type == CTOKT_INT) {
		    if (size <= 10) {
			_str2int_no((int *)(((char *)info) + map->offs),
				p, x, sign);
		    } else {
			if (_str2int((int *)(((char *)info) + map->offs),
				p, x, sign) != TCL_OK) {
			    goto overflow;
			}
		    }
		    p = x;
		} else {
		    if (size <= 18) {
			_str2wideInt_no((Tcl_WideInt *)(((char *)info) + map->offs),
				p, x, sign);
		    } else {
			if (_str2wideInt((Tcl_WideInt *)(((char *)info) + map->offs),
				p, x, sign) != TCL_OK) {
			    goto overflow;
			}
		    }
		    p = x;
		}
		flags = (flags & ~map->clearFlags) | map->flags;
	    }
	}
	break;
	case CTOKT_PARSER:
	    switch (map->parser(opts, info, tok)) {
		case TCL_OK:
		break;
		case TCL_RETURN:
		    if ((map->flags & CLF_OPTIONAL)) {
			yyInput = p;
			continue;
		    }
		    goto not_match;
		break;
		default:
		    goto done;
		break;
	    };
	    /* decrement count for possible spaces in match */
	    while (p < yyInput) {
		if (isspace(UCHAR(*p))) {
		    yySpaceCount--;
		}
		p++;
	    }
	    p = yyInput;
	    flags = (flags & ~map->clearFlags) | map->flags;
	break;
	case CTOKT_SPACE:
	    /* at least one space */
	    if (!isspace(UCHAR(*p))) {
		/* unmatched -> error */
		goto not_match;
	    }
	    /* don't decrement yySpaceCount by regular (first expected space),
	     * already considered above with fss->scnSpaceCount */;
	    p++;
	    while (p < end && isspace(UCHAR(*p))) {
		yySpaceCount--;
		p++;
	    }
	break;
	case CTOKT_WORD:
	    x = FindWordEnd(tok, p, end);
	    if (!x) {
		/* no match -> error */
		goto not_match;
	    }
	    p = x;
	break;
	case CTOKT_CHAR:
	    x = (char *)map->data;
	    if (*x != *p) {
		/* no match -> error */
		goto not_match;
	    }
	    if (isspace(UCHAR(*x))) {
		yySpaceCount--;
	    }
	    p++;
	break;
	}
    }
    /* check end was reached */
    if (p < end) {
	/* in non-strict mode bypass spaces at end of input */
	if ( !(opts->flags & CLF_STRICT) && isspace(UCHAR(*p)) ) {
	    p++;
	    while (p < end && isspace(UCHAR(*p))) {
		p++;
	    }
	}
	/* something after last token - wrong format */
	if (p < end) {
	    goto not_match;
	}
    }
    /* end of string, check only optional tokens at end, otherwise - not match */
    while (tok->map != NULL) {
	if (!(opts->flags & CLF_STRICT) && (tok->map->type == CTOKT_SPACE)) {
	    tok++;
	    if (tok->map == NULL) {
		/* no tokens anymore - trailing spaces are mandatory */
		goto not_match;
	    }
	}
	if (!(tok->map->flags & CLF_OPTIONAL)) {
	    goto not_match;
	}
	tok++;
    }

    /*
     * Invalidate result
     */
    flags |= info->flags;

    /* seconds token (%s) take precedence over all other tokens */
    if ((opts->flags & CLF_EXTENDED) || !(flags & CLF_POSIXSEC)) {
	if (flags & CLF_DATE) {

	    if (!(flags & CLF_JULIANDAY)) {
		info->flags |= CLF_ASSEMBLE_SECONDS|CLF_ASSEMBLE_JULIANDAY;

		/* dd precedence below ddd */
		switch (flags & (CLF_MONTH|CLF_DAYOFYEAR|CLF_DAYOFMONTH)) {
		    case (CLF_DAYOFYEAR|CLF_DAYOFMONTH):
		    /* miss month: ddd over dd (without month) */
		    flags &= ~CLF_DAYOFMONTH;
		    /* fallthrough */
		    case (CLF_DAYOFYEAR):
		    /* ddd over naked weekday */
		    if (!(flags & CLF_ISO8601YEAR)) {
			flags &= ~CLF_ISO8601WEAK;
		    }
		    break;
		    case (CLF_MONTH|CLF_DAYOFYEAR|CLF_DAYOFMONTH):
		    /* both available: mmdd over ddd */
		    case (CLF_MONTH|CLF_DAYOFMONTH):
		    case (CLF_DAYOFMONTH):
		    /* mmdd / dd over naked weekday */
		    if (!(flags & CLF_ISO8601YEAR)) {
			flags &= ~CLF_ISO8601WEAK;
		    }
		    break;
		    /* neither mmdd nor ddd available */
		    case 0:
		    /* but we have day of the week, which can be used */
		    if (flags & CLF_DAYOFWEEK) {
			/* prefer week based calculation of julianday */
			flags |= CLF_ISO8601WEAK;
		    }
		}

		/* YearWeekDay below YearMonthDay */
		if ( (flags & CLF_ISO8601WEAK)
		  && ( (flags & (CLF_YEAR|CLF_DAYOFYEAR)) == (CLF_YEAR|CLF_DAYOFYEAR)
		    || (flags & (CLF_YEAR|CLF_DAYOFMONTH|CLF_MONTH)) == (CLF_YEAR|CLF_DAYOFMONTH|CLF_MONTH)
		  )
		) {
		    /* yy precedence below yyyy */
		    if (!(flags & CLF_ISO8601CENTURY) && (flags & CLF_CENTURY)) {
			/* normally precedence of ISO is higher, but no century - so put it down */
			flags &= ~CLF_ISO8601WEAK;
		    }
		    else
		    /* yymmdd or yyddd over naked weekday */
		    if (!(flags & CLF_ISO8601YEAR)) {
			flags &= ~CLF_ISO8601WEAK;
		    }
		}

		if ( (flags & CLF_YEAR) ) {
		    if (yyYear < 100) {
			if (!(flags & CLF_CENTURY)) {
			    if (yyYear >= dataPtr->yearOfCenturySwitch) {
				yyYear -= 100;
			    }
			    yyYear += dataPtr->currentYearCentury;
			} else {
			    yyYear += info->dateCentury * 100;
			}
		    }
		}
		if ( (flags & (CLF_ISO8601WEAK|CLF_ISO8601YEAR)) ) {
		    if ((flags & (CLF_ISO8601YEAR|CLF_YEAR)) == CLF_YEAR) {
		    	/* for calculations expected iso year */
			info->date.iso8601Year = yyYear;
		    }
		    else
		    if (info->date.iso8601Year < 100) {
			if (!(flags & CLF_ISO8601CENTURY)) {
			    if (info->date.iso8601Year >= dataPtr->yearOfCenturySwitch) {
				info->date.iso8601Year -= 100;
			    }
			    info->date.iso8601Year += dataPtr->currentYearCentury;
			} else {
			    info->date.iso8601Year += info->dateCentury * 100;
			}
		    }
		    if ((flags & (CLF_ISO8601YEAR|CLF_YEAR)) == CLF_ISO8601YEAR) {
		    	/* for calculations expected year (e. g. CLF_ISO8601WEAK not set) */
			yyYear = info->date.iso8601Year;
		    }
		}
	    }
	}

	/* if no time - reset time */
	if (!(flags & (CLF_TIME|CLF_LOCALSEC|CLF_POSIXSEC))) {
	    info->flags |= CLF_ASSEMBLE_SECONDS;
	    yydate.localSeconds = 0;
	}

	if (flags & CLF_TIME) {
	    info->flags |= CLF_ASSEMBLE_SECONDS;
	    yySecondOfDay = ToSeconds(yyHour, yyMinutes,
				yySeconds, yyMeridian);
	} else
	if (!(flags & (CLF_LOCALSEC|CLF_POSIXSEC))) {
	    info->flags |= CLF_ASSEMBLE_SECONDS;
	    yySecondOfDay = yydate.localSeconds % SECONDS_PER_DAY;
	}
    }

    /* tell caller which flags were set */
    info->flags |= flags;

    ret = TCL_OK;
    goto done;

overflow:

    Tcl_SetObjResult(opts->interp, Tcl_NewStringObj("integer value too large to represent",
	-1));
    Tcl_SetErrorCode(opts->interp, "CLOCK", "dateTooLarge", (char *)NULL);
    goto done;

not_match:

  #if 1
    Tcl_SetObjResult(opts->interp, Tcl_NewStringObj("input string does not match supplied format",
	-1));
  #else
	/* to debug where exactly scan breaks */
    Tcl_SetObjResult(opts->interp, Tcl_ObjPrintf(
	"input string \"%s\" does not match supplied format \"%s\","
	" locale \"%s\" - token \"%s\"",
	info->dateStart, HashEntry4FmtScn(fss)->key.string,
        Tcl_GetString(opts->localeObj),
        tok && tok->tokWord.start ? tok->tokWord.start : "NULL"));
  #endif
    Tcl_SetErrorCode(opts->interp, "CLOCK", "badInputString", (char *)NULL);

done:

    return ret;
}

#define FrmResultIsAllocated(dateFmt) \
    (dateFmt->resEnd - dateFmt->resMem > MIN_FMT_RESULT_BLOCK_ALLOC)

static inline int
FrmResultAllocate(
    DateFormat *dateFmt,
    int len)
{
    int needed = dateFmt->output + len - dateFmt->resEnd;
    if (needed >= 0) { /* >= 0 - regards NTS zero */
	int newsize = dateFmt->resEnd - dateFmt->resMem
		    + needed + MIN_FMT_RESULT_BLOCK_ALLOC*2;
	char *newRes;
	/* differentiate between stack and memory */
	if (!FrmResultIsAllocated(dateFmt)) {
	    newRes = (char *)Tcl_Alloc(newsize);
	    if (newRes == NULL) {
		return TCL_ERROR;
	    }
	    memcpy(newRes, dateFmt->resMem, dateFmt->output - dateFmt->resMem);
	} else {
	    newRes = (char *)Tcl_Realloc(dateFmt->resMem, newsize);
	    if (newRes == NULL) {
		return TCL_ERROR;
	    }
	}
	dateFmt->output = newRes + (dateFmt->output - dateFmt->resMem);
	dateFmt->resMem = newRes;
	dateFmt->resEnd = newRes + newsize;
    }
    return TCL_OK;
}

static int
ClockFmtToken_HourAMPM_Proc(
    TCL_UNUSED(ClockFmtScnCmdArgs *),
    TCL_UNUSED(DateFormat *),
    TCL_UNUSED(ClockFormatToken *),
    int *val)
{
    *val = ( ( *val + SECONDS_PER_DAY - 3600 ) / 3600 ) % 12 + 1;
    return TCL_OK;
}

static int
ClockFmtToken_AMPM_Proc(
    ClockFmtScnCmdArgs *opts,
    DateFormat *dateFmt,
    ClockFormatToken *tok,
    int *val)
{
    Tcl_Obj *mcObj;
    const char *s;
    Tcl_Size len;

    if (*val < (SECONDS_PER_DAY / 2)) {
	mcObj = ClockMCGet(opts, MCLIT_AM);
    } else {
	mcObj = ClockMCGet(opts, MCLIT_PM);
    }
    if (mcObj == NULL) {
	return TCL_ERROR;
    }
    s = TclGetStringFromObj(mcObj, &len);
    if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
    memcpy(dateFmt->output, s, len + 1);
    if (*tok->tokWord.start == 'p') {
	len = Tcl_UtfToUpper(dateFmt->output);
    }
    dateFmt->output += len;

    return TCL_OK;
}

static int
ClockFmtToken_StarDate_Proc(
    TCL_UNUSED(ClockFmtScnCmdArgs *),
    DateFormat *dateFmt,
    TCL_UNUSED(ClockFormatToken *),
    TCL_UNUSED(int *))
{
    int fractYear;
    /* Get day of year, zero based */
    int v = dateFmt->date.dayOfYear - 1;

    /* Convert day of year to a fractional year */
    if (IsGregorianLeapYear(&dateFmt->date)) {
	fractYear = 1000 * v / 366;
    } else {
	fractYear = 1000 * v / 365;
    }

    /* Put together the StarDate as "Stardate %02d%03d.%1d" */
    if (FrmResultAllocate(dateFmt, 30) != TCL_OK) { return TCL_ERROR; };
    memcpy(dateFmt->output, "Stardate ", 9);
    dateFmt->output += 9;
    dateFmt->output = _itoaw(dateFmt->output,
	dateFmt->date.year - RODDENBERRY, '0', 2);
    dateFmt->output = _itoaw(dateFmt->output,
	fractYear, '0', 3);
    *dateFmt->output++ = '.';
    /* be sure positive after decimal point (note: clock-value can be negative) */
    v = dateFmt->date.secondOfDay / ( SECONDS_PER_DAY / 10 );
    if (v < 0) v = 10 + v;
    dateFmt->output = _itoaw(dateFmt->output, v, '0', 1);

    return TCL_OK;
}
static int
ClockFmtToken_WeekOfYear_Proc(
    TCL_UNUSED(ClockFmtScnCmdArgs *),
    DateFormat *dateFmt,
    ClockFormatToken *tok,
    int *val)
{
    int dow = dateFmt->date.dayOfWeek;

    if (*tok->tokWord.start == 'U') {
	if (dow == 7) {
	    dow = 0;
	}
	dow++;
    }
    *val = ( dateFmt->date.dayOfYear - dow + 7 ) / 7;
    return TCL_OK;
}
static int
ClockFmtToken_JDN_Proc(
    TCL_UNUSED(ClockFmtScnCmdArgs *),
    DateFormat *dateFmt,
    ClockFormatToken *tok,
    TCL_UNUSED(int *))
{
    Tcl_WideInt intJD = dateFmt->date.julianDay;
    int fractJD;

    /* Convert to JDN parts (regarding start offset) and time fraction */
    fractJD = dateFmt->date.secondOfDay
	- (int)tok->map->offs; /* 0 for calendar or 43200 for astro JD */
    if (fractJD < 0) {
    	intJD--;
	fractJD += SECONDS_PER_DAY;
    }
    if (fractJD && intJD < 0) { /* avoid jump over 0, by negative JD's */
	intJD++;
	if (intJD == 0) {
	    /* -0.0 / -0.9 has zero integer part, so append "-" extra */
	    if (FrmResultAllocate(dateFmt, 1) != TCL_OK) { return TCL_ERROR; };
	    *dateFmt->output++ = '-';
	}
	/* and inverse seconds of day, -0(75) -> -0.25 as float */
	fractJD = SECONDS_PER_DAY - fractJD;
    }

    /* 21 is max width of (negative) wide-int (rather smaller, but anyway a time fraction below) */
    if (FrmResultAllocate(dateFmt, 21) != TCL_OK) { return TCL_ERROR; };
    dateFmt->output = _witoaw(dateFmt->output, intJD, '0', 1);
    /* simplest cases .0 and .5 */
    if (!fractJD || fractJD == (SECONDS_PER_DAY / 2)) {
	/* point + 0 or 5 */
	if (FrmResultAllocate(dateFmt, 1+1) != TCL_OK) { return TCL_ERROR; };
	*dateFmt->output++ = '.';
	*dateFmt->output++ = !fractJD ? '0' : '5';
	*dateFmt->output = '\0';
	return TCL_OK;
    } else {
	/* wrap the time fraction */
	#define JDN_MAX_PRECISION 8
	#define JDN_MAX_PRECBOUND 100000000 /* 10**JDN_MAX_PRECISION */
	char *p;

	/* to float (part after floating point, + 0.5 to round it up) */
	fractJD = (int)(
	    (double)fractJD * JDN_MAX_PRECBOUND / SECONDS_PER_DAY + 0.5
	);
	/* point + integer (as time fraction after floating point) */
	if (FrmResultAllocate(dateFmt, 1+JDN_MAX_PRECISION) != TCL_OK) { return TCL_ERROR; };
	*dateFmt->output++ = '.';
	p = _itoaw(dateFmt->output, fractJD, '0', JDN_MAX_PRECISION);
	/* remove trailing zero's */
	dateFmt->output++;
	while (p > dateFmt->output && *(p-1) == '0') {p--;}
	*p = '\0';
	dateFmt->output = p;
    }
    return TCL_OK;
}
static int
ClockFmtToken_TimeZone_Proc(
    ClockFmtScnCmdArgs *opts,
    DateFormat *dateFmt,
    ClockFormatToken *tok,
    TCL_UNUSED(int *))
{
    if (*tok->tokWord.start == 'z') {
	int z = dateFmt->date.tzOffset;
	char sign = '+';

	if ( z < 0 ) {
	    z = -z;
	    sign = '-';
	}
	if (FrmResultAllocate(dateFmt, 7) != TCL_OK) { return TCL_ERROR; };
	*dateFmt->output++ = sign;
	dateFmt->output = _itoaw(dateFmt->output, z / 3600, '0', 2);
	z %= 3600;
	dateFmt->output = _itoaw(dateFmt->output, z / 60, '0', 2);
	z %= 60;
	if (z != 0) {
	    dateFmt->output = _itoaw(dateFmt->output, z, '0', 2);
	}
    } else {
	Tcl_Obj * objPtr;
	const char *s; Tcl_Size len;
	/* convert seconds to local seconds to obtain tzName object */
	if (ConvertUTCToLocal(opts->clientData, opts->interp,
		&dateFmt->date, opts->timezoneObj,
		GREGORIAN_CHANGE_DATE) != TCL_OK) {
	    return TCL_ERROR;
	};
	objPtr = dateFmt->date.tzName;
	s = TclGetStringFromObj(objPtr, &len);
	if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
	memcpy(dateFmt->output, s, len + 1);
	dateFmt->output += len;
    }
    return TCL_OK;
}

static int
ClockFmtToken_LocaleERA_Proc(
    ClockFmtScnCmdArgs *opts,
    DateFormat *dateFmt,
    TCL_UNUSED(ClockFormatToken *),
    TCL_UNUSED(int *))
{
    Tcl_Obj *mcObj;
    const char *s;
    Tcl_Size len;

    if (dateFmt->date.isBce) {
	mcObj = ClockMCGet(opts, MCLIT_BCE);
    } else {
	mcObj = ClockMCGet(opts, MCLIT_CE);
    }
    if (mcObj == NULL) {
	return TCL_ERROR;
    }
    s = TclGetStringFromObj(mcObj, &len);
    if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
    memcpy(dateFmt->output, s, len + 1);
    dateFmt->output += len;

    return TCL_OK;
}

static int
ClockFmtToken_LocaleERAYear_Proc(
    ClockFmtScnCmdArgs *opts,
    DateFormat *dateFmt,
    ClockFormatToken *tok,
    int *val)
{
    Tcl_Size rowc;
    Tcl_Obj **rowv;

    if (dateFmt->localeEra == NULL) {
	Tcl_Obj *mcObj = ClockMCGet(opts, MCLIT_LOCALE_ERAS);
	if (mcObj == NULL) {
	    return TCL_ERROR;
	}
	if (TclListObjGetElements(opts->interp, mcObj, &rowc, &rowv) != TCL_OK) {
	    return TCL_ERROR;
	}
	if (rowc != 0) {
	    dateFmt->localeEra = LookupLastTransition(opts->interp,
		dateFmt->date.localSeconds, rowc, rowv, NULL);
	}
	if (dateFmt->localeEra == NULL) {
	    dateFmt->localeEra = (Tcl_Obj*)1;
	}
    }

    /* if no LOCALE_ERAS in catalog or era not found */
    if (dateFmt->localeEra == (Tcl_Obj*)1) {
	if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { return TCL_ERROR; };
	if (*tok->tokWord.start == 'C') { /* %EC */
	    *val = dateFmt->date.year / 100;
	    dateFmt->output = _itoaw(dateFmt->output,
		*val, '0', 2);
	} else {			  /* %Ey */
	    *val = dateFmt->date.year % 100;
	    dateFmt->output = _itoaw(dateFmt->output,
		*val, '0', 2);
	}
    } else {
	Tcl_Obj *objPtr;
	const char *s;
	Tcl_Size len;
	if (*tok->tokWord.start == 'C') { /* %EC */
	    if (Tcl_ListObjIndex(opts->interp, dateFmt->localeEra, 1,
			&objPtr) != TCL_OK ) {
		return TCL_ERROR;
	    }
	} else {			  /* %Ey */
	    if (Tcl_ListObjIndex(opts->interp, dateFmt->localeEra, 2,
			&objPtr) != TCL_OK ) {
		return TCL_ERROR;
	    }
	    if (Tcl_GetIntFromObj(opts->interp, objPtr, val) != TCL_OK) {
		return TCL_ERROR;
	    }
	    *val = dateFmt->date.year - *val;
	    /* if year in locale numerals */
	    if (*val >= 0 && *val < 100) {
		/* year as integer */
		Tcl_Obj * mcObj = ClockMCGet(opts, MCLIT_LOCALE_NUMERALS);
		if (mcObj == NULL) {
		    return TCL_ERROR;
		}
		if (Tcl_ListObjIndex(opts->interp, mcObj, *val, &objPtr) != TCL_OK) {
		    return TCL_ERROR;
		}
	    } else {
		/* year as integer */
		if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { return TCL_ERROR; };
		dateFmt->output = _itoaw(dateFmt->output,
		    *val, '0', 2);
		return TCL_OK;
	    }
	}
	s = TclGetStringFromObj(objPtr, &len);
	if (FrmResultAllocate(dateFmt, len) != TCL_OK) { return TCL_ERROR; };
	memcpy(dateFmt->output, s, len + 1);
	dateFmt->output += len;
    }
    return TCL_OK;
}


static const char *FmtSTokenMapIndex =
    "demNbByYCHMSIklpaAuwUVzgGjJsntQ";
static ClockFormatTokenMap FmtSTokenMap[] = {
    /* %d */
    {CTOKT_INT, "0", 2, 0, 0, 0, offsetof(DateFormat, date.dayOfMonth), NULL, NULL},
    /* %e */
    {CTOKT_INT, " ", 2, 0, 0, 0, offsetof(DateFormat, date.dayOfMonth), NULL, NULL},
    /* %m */
    {CTOKT_INT, "0", 2, 0, 0, 0, offsetof(DateFormat, date.month), NULL, NULL},
    /* %N */
    {CTOKT_INT, " ", 2, 0, 0, 0, offsetof(DateFormat, date.month), NULL, NULL},
    /* %b %h */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX | CLFMT_DECR, 0, 12, offsetof(DateFormat, date.month),
	NULL, (void *)MCLIT_MONTHS_ABBREV},
    /* %B */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX | CLFMT_DECR, 0, 12, offsetof(DateFormat, date.month),
	NULL, (void *)MCLIT_MONTHS_FULL},
    /* %y */
    {CTOKT_INT, "0", 2, 0, 0, 100, offsetof(DateFormat, date.year), NULL, NULL},
    /* %Y */
    {CTOKT_INT, "0", 4, 0, 0, 0, offsetof(DateFormat, date.year), NULL, NULL},
    /* %C */
    {CTOKT_INT, "0", 2, 0, 100, 0, offsetof(DateFormat, date.year), NULL, NULL},
    /* %H */
    {CTOKT_INT, "0", 2, 0, 3600, 24, offsetof(DateFormat, date.secondOfDay), NULL, NULL},
    /* %M */
    {CTOKT_INT, "0", 2, 0, 60, 60, offsetof(DateFormat, date.secondOfDay), NULL, NULL},
    /* %S */
    {CTOKT_INT, "0", 2, 0, 0, 60, offsetof(DateFormat, date.secondOfDay), NULL, NULL},
    /* %I */
    {CTOKT_INT, "0", 2, CLFMT_CALC, 0, 0, offsetof(DateFormat, date.secondOfDay),
	ClockFmtToken_HourAMPM_Proc, NULL},
    /* %k */
    {CTOKT_INT, " ", 2, 0, 3600, 24, offsetof(DateFormat, date.secondOfDay), NULL, NULL},
    /* %l */
    {CTOKT_INT, " ", 2, CLFMT_CALC, 0, 0, offsetof(DateFormat, date.secondOfDay),
	ClockFmtToken_HourAMPM_Proc, NULL},
    /* %p %P */
    {CTOKT_INT, NULL, 0, 0, 0, 0, offsetof(DateFormat, date.secondOfDay),
	ClockFmtToken_AMPM_Proc, NULL},
    /* %a */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, offsetof(DateFormat, date.dayOfWeek),
	NULL, (void *)MCLIT_DAYS_OF_WEEK_ABBREV},
    /* %A */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, offsetof(DateFormat, date.dayOfWeek),
	NULL, (void *)MCLIT_DAYS_OF_WEEK_FULL},
    /* %u */
    {CTOKT_INT, " ", 1, 0, 0, 0, offsetof(DateFormat, date.dayOfWeek), NULL, NULL},
    /* %w */
    {CTOKT_INT, " ", 1, 0, 0, 7, offsetof(DateFormat, date.dayOfWeek), NULL, NULL},
    /* %U %W */
    {CTOKT_INT, "0", 2, CLFMT_CALC, 0, 0, offsetof(DateFormat, date.dayOfYear),
	ClockFmtToken_WeekOfYear_Proc, NULL},
    /* %V */
    {CTOKT_INT, "0", 2, 0, 0, 0, offsetof(DateFormat, date.iso8601Week), NULL, NULL},
    /* %z %Z */
    {CFMTT_PROC, NULL, 0, 0, 0, 0, 0,
	ClockFmtToken_TimeZone_Proc, NULL},
    /* %g */
    {CTOKT_INT, "0", 2, 0, 0, 100, offsetof(DateFormat, date.iso8601Year), NULL, NULL},
    /* %G */
    {CTOKT_INT, "0", 4, 0, 0, 0, offsetof(DateFormat, date.iso8601Year), NULL, NULL},
    /* %j */
    {CTOKT_INT, "0", 3, 0, 0, 0, offsetof(DateFormat, date.dayOfYear), NULL, NULL},
    /* %J */
    {CTOKT_WIDE, "0", 7, 0, 0, 0, offsetof(DateFormat, date.julianDay), NULL, NULL},
    /* %s */
    {CTOKT_WIDE, "0", 1, 0, 0, 0, offsetof(DateFormat, date.seconds), NULL, NULL},
    /* %n */
    {CTOKT_CHAR, "\n", 0, 0, 0, 0, 0, NULL, NULL},
    /* %t */
    {CTOKT_CHAR, "\t", 0, 0, 0, 0, 0, NULL, NULL},
    /* %Q */
    {CFMTT_PROC, NULL, 0, 0, 0, 0, 0,
	ClockFmtToken_StarDate_Proc, NULL},
};
static const char *FmtSTokenMapAliasIndex[2] = {
    "hPWZ",
    "bpUz"
};

static const char *FmtETokenMapIndex =
    "EJjys";
static ClockFormatTokenMap FmtETokenMap[] = {
    /* %EE */
    {CFMTT_PROC, NULL, 0, 0, 0, 0, 0,
	ClockFmtToken_LocaleERA_Proc, NULL},
    /* %EJ */
    {CFMTT_PROC, NULL, 0, 0, 0, 0, 0, /* calendar JDN starts at midnight */
	ClockFmtToken_JDN_Proc, NULL},
    /* %Ej */
    {CFMTT_PROC, NULL, 0, 0, 0, 0, (SECONDS_PER_DAY/2), /* astro JDN starts at noon */
	ClockFmtToken_JDN_Proc, NULL},
    /* %Ey %EC */
    {CTOKT_INT, NULL, 0, 0, 0, 0, offsetof(DateFormat, date.year),
	ClockFmtToken_LocaleERAYear_Proc, NULL},
    /* %Es */
    {CTOKT_WIDE, "0", 1, 0, 0, 0, offsetof(DateFormat, date.localSeconds), NULL, NULL},
};
static const char *FmtETokenMapAliasIndex[2] = {
    "C",
    "y"
};

static const char *FmtOTokenMapIndex =
    "dmyHIMSuw";
static ClockFormatTokenMap FmtOTokenMap[] = {
    /* %Od %Oe */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, offsetof(DateFormat, date.dayOfMonth),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Om */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, offsetof(DateFormat, date.month),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Oy */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, offsetof(DateFormat, date.year),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OH %Ok */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 3600, 24, offsetof(DateFormat, date.secondOfDay),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OI %Ol */
    {CTOKT_INT, NULL, 0, CLFMT_CALC | CLFMT_LOCALE_INDX, 0, 0, offsetof(DateFormat, date.secondOfDay),
	ClockFmtToken_HourAMPM_Proc, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OM */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 60, 60, offsetof(DateFormat, date.secondOfDay),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %OS */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 60, offsetof(DateFormat, date.secondOfDay),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Ou */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 100, offsetof(DateFormat, date.dayOfWeek),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
    /* %Ow */
    {CTOKT_INT, NULL, 0, CLFMT_LOCALE_INDX, 0, 7, offsetof(DateFormat, date.dayOfWeek),
	NULL, (void *)MCLIT_LOCALE_NUMERALS},
};
static const char *FmtOTokenMapAliasIndex[2] = {
    "ekl",
    "dHI"
};

static ClockFormatTokenMap FmtWordTokenMap = {
    CTOKT_WORD, NULL, 0, 0, 0, 0, 0, NULL, NULL
};

/*
 *----------------------------------------------------------------------
 */
ClockFmtScnStorage *
ClockGetOrParseFmtFormat(
    Tcl_Interp *interp,		/* Tcl interpreter */
    Tcl_Obj    *formatObj)	/* Format container */
{
    ClockFmtScnStorage *fss;

    fss = Tcl_GetClockFrmScnFromObj(interp, formatObj);
    if (fss == NULL) {
	return NULL;
    }

    /* if format (fmtTok) already tokenized */
    if (fss->fmtTok != NULL) {
	return fss;
    }

    Tcl_MutexLock(&ClockFmtMutex);

    /* first time formatting - tokenize format */
    if (fss->fmtTok == NULL) {
	ClockFormatToken *tok, *fmtTok;
	unsigned int tokCnt;
	const char *p, *e, *cp;

	e = p = HashEntry4FmtScn(fss)->key.string;
	e += strlen(p);

	/* estimate token count by % char and format length */
	fss->fmtTokC = EstimateTokenCount(p, e);

	fmtTok = tok = (ClockFormatToken *)Tcl_Alloc(sizeof(*tok) * fss->fmtTokC);
	memset(tok, 0, sizeof(*(tok)));
	tokCnt = 1;
	while (p < e) {
	    switch (*p) {
	    case '%':
	    if (1) {
		ClockFormatTokenMap * fmtMap = FmtSTokenMap;
		const char *mapIndex =	FmtSTokenMapIndex,
			  **aliasIndex = FmtSTokenMapAliasIndex;
		if (p+1 >= e) {
		    goto word_tok;
		}
		p++;
		/* try to find modifier: */
		switch (*p) {
		case '%':
		    /* begin new word token - don't join with previous word token,
		     * because current mapping should be "...%%..." -> "...%..." */
		    tok->map = &FmtWordTokenMap;
		    tok->tokWord.start = p;
		    tok->tokWord.end = p+1;
		    AllocTokenInChain(tok, fmtTok, fss->fmtTokC, ClockFormatToken *); tokCnt++;
		    p++;
		    continue;
		break;
		case 'E':
		    fmtMap = FmtETokenMap,
		    mapIndex =	FmtETokenMapIndex,
		    aliasIndex = FmtETokenMapAliasIndex;
		    p++;
		break;
		case 'O':
		    fmtMap = FmtOTokenMap,
		    mapIndex = FmtOTokenMapIndex,
		    aliasIndex = FmtOTokenMapAliasIndex;
		    p++;
		break;
		}
		/* search direct index */
		cp = strchr(mapIndex, *p);
		if (!cp || *cp == '\0') {
		    /* search wrapper index (multiple chars for same token) */
		    cp = strchr(aliasIndex[0], *p);
		    if (!cp || *cp == '\0') {
			p--; if (fmtMap != FmtSTokenMap) p--;
			goto word_tok;
		    }
		    cp = strchr(mapIndex, aliasIndex[1][cp - aliasIndex[0]]);
		    if (!cp || *cp == '\0') { /* unexpected, but ... */
		    #ifdef DEBUG
			Tcl_Panic("token \"%c\" has no map in wrapper resolver", *p);
		    #endif
			p--; if (fmtMap != FmtSTokenMap) p--;
			goto word_tok;
		    }
		}
		tok->map = &fmtMap[cp - mapIndex];
		tok->tokWord.start = p;
		/* next token */
		AllocTokenInChain(tok, fmtTok, fss->fmtTokC, ClockFormatToken *); tokCnt++;
		p++;
		continue;
	    }
	    break;
	    default:
word_tok:
	    if (1) {
		ClockFormatToken *wordTok = tok;
		if (tok > fmtTok && (tok-1)->map == &FmtWordTokenMap) {
		    wordTok = tok-1;
		}
		if (wordTok == tok) {
		    wordTok->tokWord.start = p;
		    wordTok->map = &FmtWordTokenMap;
		    AllocTokenInChain(tok, fmtTok, fss->fmtTokC, ClockFormatToken *); tokCnt++;
		}
		p = Tcl_UtfNext(p);
		wordTok->tokWord.end = p;
	    }
	    break;
	    }
	}

	/* correct count of real used tokens and free mem if desired
	 * (1 is acceptable delta to prevent memory fragmentation) */
	if (fss->fmtTokC > tokCnt + (CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE / 2)) {
	    if ( (tok = (ClockFormatToken *)Tcl_Realloc(fmtTok, tokCnt * sizeof(*tok))) != NULL ) {
		fmtTok = tok;
	    }
	}

	/* now we're ready - assign now to storage (note the threaded race condition) */
	fss->fmtTok = fmtTok;
	fss->fmtTokC = tokCnt;
    }
done:
    Tcl_MutexUnlock(&ClockFmtMutex);

    return fss;
}

/*
 *----------------------------------------------------------------------
 */
int
ClockFormat(
    DateFormat *dateFmt, /* Date fields used for parsing & converting */
    ClockFmtScnCmdArgs *opts)	  /* Command options */
{
    ClockFmtScnStorage	*fss;
    ClockFormatToken	*tok;
    ClockFormatTokenMap *map;
    char resMem[MIN_FMT_RESULT_BLOCK_ALLOC];

    /* get localized format */
    if (ClockLocalizeFormat(opts) == NULL) {
	return TCL_ERROR;
    }

    if ( !(fss = ClockGetOrParseFmtFormat(opts->interp, opts->formatObj))
      || !(tok = fss->fmtTok)
    ) {
	return TCL_ERROR;
    }

    /* result container object */
    dateFmt->resMem = resMem;
    dateFmt->resEnd = dateFmt->resMem + sizeof(resMem);
    if (fss->fmtMinAlloc > sizeof(resMem)) {
	dateFmt->resMem = (char *)Tcl_Alloc(fss->fmtMinAlloc);
	dateFmt->resEnd = dateFmt->resMem + fss->fmtMinAlloc;
	if (dateFmt->resMem == NULL) {
	    return TCL_ERROR;
	}
    }
    dateFmt->output = dateFmt->resMem;
    *dateFmt->output = '\0';

    /* do format each token */
    for (; tok->map != NULL; tok++) {
	map = tok->map;
	switch (map->type)
	{
	case CTOKT_INT:
	if (1) {
	    int val = (int)*(int *)(((char *)dateFmt) + map->offs);
	    if (map->fmtproc == NULL) {
		if (map->flags & CLFMT_DECR) {
		    val--;
		}
		if (map->flags & CLFMT_INCR) {
		    val++;
		}
		if (map->divider) {
		    val /= map->divider;
		}
		if (map->divmod) {
		    val %= map->divmod;
		}
	    } else {
		if (map->fmtproc(opts, dateFmt, tok, &val) != TCL_OK) {
		    goto done;
		}
		/* if not calculate only (output inside fmtproc) */
		if (!(map->flags & CLFMT_CALC)) {
		    continue;
		}
	    }
	    if (!(map->flags & CLFMT_LOCALE_INDX)) {
		if (FrmResultAllocate(dateFmt, 11) != TCL_OK) { goto error; };
		if (map->width) {
		    dateFmt->output = _itoaw(dateFmt->output, val, *map->tostr, map->width);
		} else {
		    dateFmt->output += sprintf(dateFmt->output, map->tostr, val);
		}
	    } else {
		const char *s;
		Tcl_Obj * mcObj = ClockMCGet(opts, PTR2INT(map->data) /* mcKey */);
		if (mcObj == NULL) {
		    goto error;
		}
		if ( Tcl_ListObjIndex(opts->interp, mcObj, val, &mcObj) != TCL_OK
		  || mcObj == NULL
		) {
		    goto error;
		}
		s = TclGetString(mcObj);
		if (FrmResultAllocate(dateFmt, mcObj->length) != TCL_OK) { goto error; };
		memcpy(dateFmt->output, s, mcObj->length + 1);
		dateFmt->output += mcObj->length;
	    }
	}
	break;
	case CTOKT_WIDE:
	if (1) {
	    Tcl_WideInt val = *(Tcl_WideInt *)(((char *)dateFmt) + map->offs);
	    if (FrmResultAllocate(dateFmt, 21) != TCL_OK) { goto error; };
	    if (map->width) {
		dateFmt->output = _witoaw(dateFmt->output, val, *map->tostr, map->width);
	    } else {
		dateFmt->output += sprintf(dateFmt->output, map->tostr, val);
	    }
	}
	break;
	case CTOKT_CHAR:
	    if (FrmResultAllocate(dateFmt, 1) != TCL_OK) { goto error; };
	    *dateFmt->output++ = *map->tostr;
	break;
	case CFMTT_PROC:
	    if (map->fmtproc(opts, dateFmt, tok, NULL) != TCL_OK) {
		goto error;
	    };
	break;
	case CTOKT_WORD:
	    if (1) {
		Tcl_Size len = tok->tokWord.end - tok->tokWord.start;
		if (FrmResultAllocate(dateFmt, len) != TCL_OK) { goto error; };
		if (len == 1) {
		    *dateFmt->output++ = *tok->tokWord.start;
		} else {
		    memcpy(dateFmt->output, tok->tokWord.start, len);
		    dateFmt->output += len;
		}
	    }
	break;
	}
    }

    goto done;

error:

    if (dateFmt->resMem != resMem) {
	Tcl_Free(dateFmt->resMem);
    }
    dateFmt->resMem = NULL;

done:

    if (dateFmt->resMem) {
	size_t size;
	Tcl_Obj *result;
	TclNewObj(result);
	result->length = dateFmt->output - dateFmt->resMem;
	size = result->length+1;
	if (dateFmt->resMem == resMem) {
	    result->bytes = (char *)Tcl_Alloc(size);
	    if (result->bytes == NULL) {
		return TCL_ERROR;
	    }
	    memcpy(result->bytes, dateFmt->resMem, size);
	} else if ((dateFmt->resEnd - dateFmt->resMem) / size > MAX_FMT_RESULT_THRESHOLD) {
	    result->bytes = (char *)Tcl_Realloc(dateFmt->resMem, size);
	    if (result->bytes == NULL) {
		result->bytes = dateFmt->resMem;
	    }
	} else {
	    result->bytes = dateFmt->resMem;
	}
	/* save last used buffer length */
	if ( dateFmt->resMem != resMem
	  && fss->fmtMinAlloc < size + MIN_FMT_RESULT_BLOCK_DELTA
	) {
	    fss->fmtMinAlloc = size + MIN_FMT_RESULT_BLOCK_DELTA;
	}
	result->bytes[result->length] = '\0';
	Tcl_SetObjResult(opts->interp, result);
	return TCL_OK;
    }

    return TCL_ERROR;
}


void
ClockFrmScnClearCaches(void)
{
    Tcl_MutexLock(&ClockFmtMutex);
    /* clear caches ... */
    Tcl_MutexUnlock(&ClockFmtMutex);
}

static void
ClockFrmScnFinalize(
    TCL_UNUSED(void *))
{
    Tcl_MutexLock(&ClockFmtMutex);
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
    /* clear GC */
    ClockFmtScnStorage_GC.stackPtr = NULL;
    ClockFmtScnStorage_GC.stackBound = NULL;
    ClockFmtScnStorage_GC.count = 0;
#endif
    if (initialized) {
	Tcl_DeleteHashTable(&FmtScnHashTable);
	initialized = 0;
    }
    Tcl_MutexUnlock(&ClockFmtMutex);
    Tcl_MutexFinalize(&ClockFmtMutex);
}
/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

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/*
 * tclDate.c --
 *
 *	This file is generated from a yacc grammar defined in the file
 *	tclGetDate.y. It should not be edited directly.
 *
 * Copyright (c) 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 * Copyright © 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright © 1995-1997 Sun Microsystems, Inc.
 * Copyright © 2015 Sergey G. Brester aka sebres.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 */
#include "tclInt.h"

/*
 * Bison generates several labels that happen to be unused. MS Visual C++
 * doesn't like that, and complains. Tell it to shut up.
 */

#ifdef _MSC_VER
#pragma warning( disable : 4102 )
#endif /* _MSC_VER */

/*
 * Meridian: am, pm, or 24-hour style.
 */

typedef enum _MERIDIAN {
#if 0
#define YYDEBUG 1
    MERam, MERpm, MER24
} MERIDIAN;
#endif

/*
 * yyparse will accept a 'struct DateInfo' as its parameter; that's where the
 * parsed fields will be returned.
 */

typedef struct DateInfo {

#include "tclDate.h"
    Tcl_Obj* messages;		/* Error messages */
    const char* separatrix;	/* String separating messages */

    time_t dateYear;
    time_t dateMonth;
    time_t dateDay;
    int dateHaveDate;

    time_t dateHour;
    time_t dateMinutes;
    time_t dateSeconds;
    MERIDIAN dateMeridian;
    int dateHaveTime;

    time_t dateTimezone;
    int dateDSTmode;
    int dateHaveZone;

    time_t dateRelMonth;
    time_t dateRelDay;
    time_t dateRelSeconds;
    int dateHaveRel;

    time_t dateMonthOrdinal;
    int dateHaveOrdinalMonth;

    time_t dateDayOrdinal;
    time_t dateDayNumber;
    int dateHaveDay;

    const char *dateStart;
    const char *dateInput;
    time_t *dateRelPointer;

    int dateDigitCount;
} DateInfo;

#define YYMALLOC	Tcl_Alloc
#define YYFREE(x)	(Tcl_Free((void*) (x)))

#define yyDSTmode	(info->dateDSTmode)
#define yyDayOrdinal	(info->dateDayOrdinal)
#define yyDayNumber	(info->dateDayNumber)
#define yyMonthOrdinal	(info->dateMonthOrdinal)
#define yyHaveDate	(info->dateHaveDate)
#define yyHaveDay	(info->dateHaveDay)
#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
#define yyHaveRel	(info->dateHaveRel)
#define yyHaveTime	(info->dateHaveTime)
#define yyHaveZone	(info->dateHaveZone)
#define yyTimezone	(info->dateTimezone)
#define yyDay		(info->dateDay)
#define yyMonth		(info->dateMonth)
#define yyYear		(info->dateYear)
#define yyHour		(info->dateHour)
#define yyMinutes	(info->dateMinutes)
#define yySeconds	(info->dateSeconds)
#define yyMeridian	(info->dateMeridian)
#define yyRelMonth	(info->dateRelMonth)
#define yyRelDay	(info->dateRelDay)
#define yyRelSeconds	(info->dateRelSeconds)
#define yyRelPointer	(info->dateRelPointer)
#define yyInput		(info->dateInput)
#define yyDigitCount	(info->dateDigitCount)

#define EPOCH		1970
#define START_OF_TIME	1902
#define END_OF_TIME	2037

/*
 * The offset of tm_year of struct tm returned by localtime, gmtime, etc.
 * Posix requires 1900.
 */

#define TM_YEAR_BASE	1900

#define HOUR(x)		((int) (60 * (x)))
#define HOUR(x)		((60 * (int)(x)))
#define SECSPERDAY	(24L * 60L * 60L)
#define IsLeapYear(x)	(((x) % 4 == 0) && ((x) % 100 != 0 || (x) % 400 == 0))

#define yyIncrFlags(f)				\
    do {					\
	info->errFlags |= (info->flags & (f));	\
	if (info->errFlags) { YYABORT; }	\
	info->flags |= (f);			\
    } while (0);

/*
 * An entry in the lexical lookup table.
 */

typedef struct _TABLE {
typedef struct {
    const char *name;
    int type;
    time_t value;
    int value;
} TABLE;

/*
 * Daylight-savings mode: on, off, or not yet known.
 */

typedef enum _DSTMODE {
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269












270
271
272
273
274
275
276
277
278
279

280
281
282
283
284
285
286
196
197
198
199
200
201
202








203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223

224
225
226
227
228
229
230
231







-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+









-
+







    tDAYZONE = 260,                /* tDAYZONE  */
    tID = 261,                     /* tID  */
    tMERIDIAN = 262,               /* tMERIDIAN  */
    tMONTH = 263,                  /* tMONTH  */
    tMONTH_UNIT = 264,             /* tMONTH_UNIT  */
    tSTARDATE = 265,               /* tSTARDATE  */
    tSEC_UNIT = 266,               /* tSEC_UNIT  */
    tSNUMBER = 267,                /* tSNUMBER  */
    tUNUMBER = 268,                /* tUNUMBER  */
    tZONE = 269,                   /* tZONE  */
    tEPOCH = 270,                  /* tEPOCH  */
    tDST = 271,                    /* tDST  */
    tISOBASE = 272,                /* tISOBASE  */
    tDAY_UNIT = 273,               /* tDAY_UNIT  */
    tNEXT = 274                    /* tNEXT  */
    tUNUMBER = 267,                /* tUNUMBER  */
    tZONE = 268,                   /* tZONE  */
    tZONEwO4 = 269,                /* tZONEwO4  */
    tZONEwO2 = 270,                /* tZONEwO2  */
    tEPOCH = 271,                  /* tEPOCH  */
    tDST = 272,                    /* tDST  */
    tISOBAS8 = 273,                /* tISOBAS8  */
    tISOBAS6 = 274,                /* tISOBAS6  */
    tISOBASL = 275,                /* tISOBASL  */
    tDAY_UNIT = 276,               /* tDAY_UNIT  */
    tNEXT = 277,                   /* tNEXT  */
    SP = 278                       /* SP  */
  };
  typedef enum yytokentype yytoken_kind_t;
#endif

/* Value type.  */
#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
union YYSTYPE
{

    time_t Number;
    Tcl_WideInt Number;
    enum _MERIDIAN Meridian;


};
typedef union YYSTYPE YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1
# define YYSTYPE_IS_DECLARED 1
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355










































356
357
358
359
360
361
362
363
364
365
366
367
368

369
370

371
372
373
374
375
376
377
378
379
380
264
265
266
267
268
269
270






























271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324

325
326

327
328


329
330
331
332
333
334
335







-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+












-
+

-
+

-
-







  YYSYMBOL_tDAYZONE = 5,                   /* tDAYZONE  */
  YYSYMBOL_tID = 6,                        /* tID  */
  YYSYMBOL_tMERIDIAN = 7,                  /* tMERIDIAN  */
  YYSYMBOL_tMONTH = 8,                     /* tMONTH  */
  YYSYMBOL_tMONTH_UNIT = 9,                /* tMONTH_UNIT  */
  YYSYMBOL_tSTARDATE = 10,                 /* tSTARDATE  */
  YYSYMBOL_tSEC_UNIT = 11,                 /* tSEC_UNIT  */
  YYSYMBOL_tSNUMBER = 12,                  /* tSNUMBER  */
  YYSYMBOL_tUNUMBER = 13,                  /* tUNUMBER  */
  YYSYMBOL_tZONE = 14,                     /* tZONE  */
  YYSYMBOL_tEPOCH = 15,                    /* tEPOCH  */
  YYSYMBOL_tDST = 16,                      /* tDST  */
  YYSYMBOL_tISOBASE = 17,                  /* tISOBASE  */
  YYSYMBOL_tDAY_UNIT = 18,                 /* tDAY_UNIT  */
  YYSYMBOL_tNEXT = 19,                     /* tNEXT  */
  YYSYMBOL_20_ = 20,                       /* ':'  */
  YYSYMBOL_21_ = 21,                       /* ','  */
  YYSYMBOL_22_ = 22,                       /* '/'  */
  YYSYMBOL_23_ = 23,                       /* '-'  */
  YYSYMBOL_24_ = 24,                       /* '.'  */
  YYSYMBOL_25_ = 25,                       /* '+'  */
  YYSYMBOL_YYACCEPT = 26,                  /* $accept  */
  YYSYMBOL_spec = 27,                      /* spec  */
  YYSYMBOL_item = 28,                      /* item  */
  YYSYMBOL_time = 29,                      /* time  */
  YYSYMBOL_zone = 30,                      /* zone  */
  YYSYMBOL_day = 31,                       /* day  */
  YYSYMBOL_date = 32,                      /* date  */
  YYSYMBOL_ordMonth = 33,                  /* ordMonth  */
  YYSYMBOL_iso = 34,                       /* iso  */
  YYSYMBOL_trek = 35,                      /* trek  */
  YYSYMBOL_relspec = 36,                   /* relspec  */
  YYSYMBOL_relunits = 37,                  /* relunits  */
  YYSYMBOL_sign = 38,                      /* sign  */
  YYSYMBOL_unit = 39,                      /* unit  */
  YYSYMBOL_number = 40,                    /* number  */
  YYSYMBOL_o_merid = 41                    /* o_merid  */
  YYSYMBOL_tUNUMBER = 12,                  /* tUNUMBER  */
  YYSYMBOL_tZONE = 13,                     /* tZONE  */
  YYSYMBOL_tZONEwO4 = 14,                  /* tZONEwO4  */
  YYSYMBOL_tZONEwO2 = 15,                  /* tZONEwO2  */
  YYSYMBOL_tEPOCH = 16,                    /* tEPOCH  */
  YYSYMBOL_tDST = 17,                      /* tDST  */
  YYSYMBOL_tISOBAS8 = 18,                  /* tISOBAS8  */
  YYSYMBOL_tISOBAS6 = 19,                  /* tISOBAS6  */
  YYSYMBOL_tISOBASL = 20,                  /* tISOBASL  */
  YYSYMBOL_tDAY_UNIT = 21,                 /* tDAY_UNIT  */
  YYSYMBOL_tNEXT = 22,                     /* tNEXT  */
  YYSYMBOL_SP = 23,                        /* SP  */
  YYSYMBOL_24_ = 24,                       /* ':'  */
  YYSYMBOL_25_ = 25,                       /* ','  */
  YYSYMBOL_26_ = 26,                       /* '-'  */
  YYSYMBOL_27_ = 27,                       /* '/'  */
  YYSYMBOL_28_T_ = 28,                     /* 'T'  */
  YYSYMBOL_29_ = 29,                       /* '.'  */
  YYSYMBOL_30_ = 30,                       /* '+'  */
  YYSYMBOL_YYACCEPT = 31,                  /* $accept  */
  YYSYMBOL_spec = 32,                      /* spec  */
  YYSYMBOL_item = 33,                      /* item  */
  YYSYMBOL_iextime = 34,                   /* iextime  */
  YYSYMBOL_time = 35,                      /* time  */
  YYSYMBOL_zone = 36,                      /* zone  */
  YYSYMBOL_comma = 37,                     /* comma  */
  YYSYMBOL_day = 38,                       /* day  */
  YYSYMBOL_iexdate = 39,                   /* iexdate  */
  YYSYMBOL_date = 40,                      /* date  */
  YYSYMBOL_ordMonth = 41,                  /* ordMonth  */
  YYSYMBOL_isosep = 42,                    /* isosep  */
  YYSYMBOL_isodate = 43,                   /* isodate  */
  YYSYMBOL_isotime = 44,                   /* isotime  */
  YYSYMBOL_iso = 45,                       /* iso  */
  YYSYMBOL_trek = 46,                      /* trek  */
  YYSYMBOL_relspec = 47,                   /* relspec  */
  YYSYMBOL_relunits = 48,                  /* relunits  */
  YYSYMBOL_sign = 49,                      /* sign  */
  YYSYMBOL_unit = 50,                      /* unit  */
  YYSYMBOL_INTNUM = 51,                    /* INTNUM  */
  YYSYMBOL_numitem = 52,                   /* numitem  */
  YYSYMBOL_o_merid = 53                    /* o_merid  */
};
typedef enum yysymbol_kind_t yysymbol_kind_t;


/* Second part of user prologue.  */


/*
 * Prototypes of internal functions.
 */

static int		LookupWord(YYSTYPE* yylvalPtr, char *buff);
 static void		TclDateerror(YYLTYPE* location,
static void		TclDateerror(YYLTYPE* location,
				     DateInfo* info, const char *s);
 static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
				   DateInfo* info);
static time_t		ToSeconds(time_t Hours, time_t Minutes,
			    time_t Seconds, MERIDIAN Meridian);
MODULE_SCOPE int	yyparse(DateInfo*);




#ifdef short
# undef short
696
697
698
699
700
701
702
703

704
705
706

707
708

709
710

711
712

713
714
715

716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734


735
736
737

738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756

757
758
759
760
761
762

763
764
765
766
767
768







769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790






791
792
793
794
795
796
797
798
799
800

801
802
803
804
805

806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822











823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838











839
840
841
842
843
844
845



846
847
848
849
850
851
852



853
854
855
856
857
858
859

860
861
862
863
864





865
866
867
868




869
870
871
872

873
874
875
876
877






878
879
880
881



882
883
884
885
886
887
888
889
890
891
892
893
894
895
896











897
898
899
900
901
902
903
904
905
906
907








908
909
910
911
912
913
914
915
916
917
918







919
920
921
922
923
924
925
651
652
653
654
655
656
657

658
659
660

661
662

663
664

665
666

667
668
669

670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687


688
689
690
691

692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710

711
712
713
714
715
716
717
718






719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742





743
744
745
746
747
748
749
750
751
752
753
754
755
756
757

758
759
760
761
762

763
764
765
766
767
768
769
770
771









772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789









790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805


806
807
808
809
810
811
812
813


814
815
816
817
818
819
820
821
822
823
824





825
826
827
828
829




830
831
832
833
834
835
836
837
838





839
840
841
842
843
844




845
846
847
848
849
850
851
852
853









854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869






870
871
872
873
874
875
876
877
878
879
880
881
882
883





884
885
886
887
888
889
890
891
892
893
894
895
896
897







-
+


-
+

-
+

-
+

-
+


-
+

















-
-
+
+


-
+


















-
+






+
-
-
-
-
-
-
+
+
+
+
+
+
+

















-
-
-
-
-
+
+
+
+
+
+









-
+




-
+








-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+







-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+





-
-
+
+
+





-
-
+
+
+







+
-
-
-
-
-
+
+
+
+
+
-
-
-
-
+
+
+
+




+
-
-
-
-
-
+
+
+
+
+
+
-
-
-
-
+
+
+






-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+





-
-
-
-
-
-
+
+
+
+
+
+
+
+






-
-
-
-
-
+
+
+
+
+
+
+







#  endif
# endif
#endif /* !YYCOPY_NEEDED */

/* YYFINAL -- State number of the termination state.  */
#define YYFINAL  2
/* YYLAST -- Last index in YYTABLE.  */
#define YYLAST   81
#define YYLAST   98

/* YYNTOKENS -- Number of terminals.  */
#define YYNTOKENS  26
#define YYNTOKENS  31
/* YYNNTS -- Number of nonterminals.  */
#define YYNNTS  16
#define YYNNTS  23
/* YYNRULES -- Number of rules.  */
#define YYNRULES  56
#define YYNRULES  72
/* YYNSTATES -- Number of states.  */
#define YYNSTATES  85
#define YYNSTATES  103

/* YYMAXUTOK -- Last valid token kind.  */
#define YYMAXUTOK   274
#define YYMAXUTOK   278


/* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM
   as returned by yylex, with out-of-bounds checking.  */
#define YYTRANSLATE(YYX)                                \
  (0 <= (YYX) && (YYX) <= YYMAXUTOK                     \
   ? YY_CAST (yysymbol_kind_t, yytranslate[YYX])        \
   : YYSYMBOL_YYUNDEF)

/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
   as returned by yylex.  */
static const yytype_int8 yytranslate[] =
{
       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,    25,    21,    23,    24,    22,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,    20,     2,
       2,     2,     2,    30,    25,    26,    29,    27,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,    24,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,    28,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
       5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
      15,    16,    17,    18,    19
      15,    16,    17,    18,    19,    20,    21,    22,    23
};

#if YYDEBUG
/* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
static const yytype_int16 yyrline[] =
{
       0,   171,   171,   172,   176,   179,   182,   185,   188,   191,
       0,   223,   223,   224,   227,   230,   233,   236,   239,   242,
     245,   249,   254,   257,   263,   269,   277,   282,   287,   291,
     297,   301,   305,   309,   313,   319,   323,   328,   333,   338,
     343,   347,   352,   356,   361,   368,   372,   378,   388,   397,
     406,   416,   430,   435,   438,   441,   444,   447,   450,   455,
     458,   463,   467,   471,   477,   495,   498
     194,   197,   201,   204,   209,   215,   221,   226,   230,   234,
     238,   242,   246,   252,   253,   256,   260,   264,   268,   272,
     276,   282,   288,   292,   297,   298,   303,   307,   312,   316,
     321,   328,   332,   338,   338,   340,   345,   350,   352,   357,
     359,   360,   368,   379,   393,   398,   401,   404,   407,   410,
     413,   416,   421,   424,   429,   433,   437,   443,   446,   449,
     454,   472,   475
};
#endif

/** Accessing symbol of state STATE.  */
#define YY_ACCESSING_SYMBOL(State) YY_CAST (yysymbol_kind_t, yystos[State])

#if YYDEBUG || 0
/* The user-facing name of the symbol whose (internal) number is
   YYSYMBOL.  No bounds checking.  */
static const char *yysymbol_name (yysymbol_kind_t yysymbol) YY_ATTRIBUTE_UNUSED;

/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
static const char *const yytname[] =
{
  "\"end of file\"", "error", "\"invalid token\"", "tAGO", "tDAY",
  "tDAYZONE", "tID", "tMERIDIAN", "tMONTH", "tMONTH_UNIT", "tSTARDATE",
  "tSEC_UNIT", "tSNUMBER", "tUNUMBER", "tZONE", "tEPOCH", "tDST",
  "tISOBASE", "tDAY_UNIT", "tNEXT", "':'", "','", "'/'", "'-'", "'.'",
  "'+'", "$accept", "spec", "item", "time", "zone", "day", "date",
  "ordMonth", "iso", "trek", "relspec", "relunits", "sign", "unit",
  "number", "o_merid", YY_NULLPTR
  "tSEC_UNIT", "tUNUMBER", "tZONE", "tZONEwO4", "tZONEwO2", "tEPOCH",
  "tDST", "tISOBAS8", "tISOBAS6", "tISOBASL", "tDAY_UNIT", "tNEXT", "SP",
  "':'", "','", "'-'", "'/'", "'T'", "'.'", "'+'", "$accept", "spec",
  "item", "iextime", "time", "zone", "comma", "day", "iexdate", "date",
  "ordMonth", "isosep", "isodate", "isotime", "iso", "trek", "relspec",
  "relunits", "sign", "unit", "INTNUM", "numitem", "o_merid", YY_NULLPTR
};

static const char *
yysymbol_name (yysymbol_kind_t yysymbol)
{
  return yytname[yysymbol];
}
#endif

#define YYPACT_NINF (-18)
#define YYPACT_NINF (-21)

#define yypact_value_is_default(Yyn) \
  ((Yyn) == YYPACT_NINF)

#define YYTABLE_NINF (-1)
#define YYTABLE_NINF (-68)

#define yytable_value_is_error(Yyn) \
  0

/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
   STATE-NUM.  */
static const yytype_int8 yypact[] =
{
     -18,     2,   -18,   -17,   -18,    -4,   -18,    10,   -18,    22,
       8,   -18,    18,   -18,    39,   -18,   -18,   -18,   -18,   -18,
     -18,   -18,   -18,   -18,   -18,   -18,    25,    21,   -18,   -18,
     -18,    16,    14,   -18,   -18,    28,    36,    41,    -5,   -18,
     -18,     5,   -18,   -18,   -18,    47,   -18,   -18,    42,    46,
      48,   -18,    -6,    40,    43,    44,    49,   -18,   -18,   -18,
     -18,   -18,   -18,   -18,   -18,    50,   -18,    51,    55,    57,
      58,    65,   -18,   -18,    59,    54,   -18,    62,    63,    60,
     -18,    64,    61,    66,   -18
     -21,    11,   -21,   -20,   -21,     5,   -21,    -9,   -21,    46,
      17,     9,     9,   -21,   -21,   -21,    24,   -21,    57,   -21,
     -21,   -21,    33,   -21,   -21,   -21,   -21,   -21,   -21,   -15,
     -21,   -21,   -21,    45,    26,   -21,    -7,   -21,    51,   -21,
     -20,   -21,   -21,   -21,    48,   -21,   -21,    67,    68,    52,
      69,   -21,    -9,    -9,   -21,   -21,   -21,   -21,    74,   -21,
      -7,   -21,   -21,   -21,   -21,    44,   -21,    79,    40,    -7,
     -21,   -21,    72,    73,   -21,    62,    61,    63,    64,   -21,
     -21,   -21,   -21,    66,   -21,   -21,   -21,   -21,    84,    -7,
     -21,   -21,   -21,    80,    81,    82,    83,   -21,   -21,   -21,
     -21,   -21,   -21
};

/* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
   Performed when YYTABLE does not specify something else to do.  Zero
   means the default is an error.  */
static const yytype_int8 yydefact[] =
{
       2,     0,     1,    20,    18,     0,    53,     0,    51,    54,
      17,    33,    27,    52,     0,    49,    50,     3,     4,     5,
       8,     6,     7,    10,    11,     9,    43,     0,    48,    12,
      21,    30,     0,    22,    13,    32,     0,     0,     0,    45,
      16,     0,    40,    24,    35,     0,    46,    42,    19,     0,
       0,    34,    55,    25,     0,     0,     0,    38,    36,    47,
      23,    44,    31,    41,    56,     0,    14,     0,     0,     0,
       0,    55,    26,    28,    29,     0,    15,     0,     0,     0,
      39,     0,     0,     0,    37
       2,     0,     1,    25,    19,     0,    66,     0,    64,    70,
      18,     0,     0,    39,    45,    46,     0,    65,     0,    62,
      63,     3,    71,     4,     5,     8,    47,     6,     7,    34,
      10,    11,     9,    55,     0,    61,     0,    12,    23,    26,
      36,    67,    69,    68,     0,    27,    15,    38,     0,     0,
       0,    17,     0,     0,    52,    51,    30,    41,    67,    59,
       0,    72,    16,    44,    43,     0,    54,    67,     0,    22,
      58,    24,     0,     0,    40,    14,     0,     0,    32,    20,
      21,    42,    60,     0,    48,    49,    50,    29,    67,     0,
      57,    37,    53,     0,     0,     0,     0,    28,    56,    13,
      35,    31,    33
};

/* YYPGOTO[NTERM-NUM].  */
static const yytype_int8 yypgoto[] =
{
     -18,   -18,   -18,   -18,   -18,   -18,   -18,   -18,   -18,   -18,
     -18,   -18,   -18,    -9,   -18,     7
     -21,   -21,   -21,    31,   -21,   -21,    58,   -21,   -21,   -21,
     -21,   -21,   -21,   -21,   -21,   -21,   -21,   -21,    -5,   -18,
      -6,   -21,   -21
};

/* YYDEFGOTO[NTERM-NUM].  */
static const yytype_int8 yydefgoto[] =
{
       0,     1,    17,    18,    19,    20,    21,    22,    23,    24,
      25,    26,    27,    28,    29,    66
       0,     1,    21,    22,    23,    24,    39,    25,    26,    27,
      28,    65,    29,    86,    30,    31,    32,    33,    34,    35,
      36,    37,    62
};

/* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
   positive, shift that token.  If negative, reduce the rule whose
   number is the opposite.  If YYTABLE_NINF, syntax error.  */
static const yytype_int8 yytable[] =
{
      59,    44,     6,    41,     8,    38,    52,    53,    63,    42,
      39,    64,     2,    54,    30,    46,     3,     4,    55,    31,
       5,     6,     7,     8,    65,     9,    10,    11,    56,    12,
      13,    14,    57,    32,    40,    15,    33,    16,    47,    34,
      35,     6,    41,     8,    48,    42,    59,    49,    50,    61,
      13,    51,    36,    43,    37,    38,    60,    44,     6,    52,
      43,     2,    60,    64,    17,     3,     4,    40,    70,     5,
       6,     7,     8,     9,    10,    11,    12,    13,    69,    14,
      15,    16,    17,    18,    51,    19,    54,    19,    67,    20,
      61,    20,    82,    55,    42,    43,    79,    80,    66,    68,
      45,    90,    88,    46,    47,   -67,    83,   -67,    42,    43,
       8,     6,    45,     8,    53,    58,     6,    13,     8,    62,
      13,    63,    67,    71,    72,    13,    68,    69,    73,    70,
      74,    75,    64,    77,    78,    79,    80,    82,    76,    84,
      81,    83
      76,    56,    89,    84,    77,    57,     6,   -67,     8,    58,
      48,    98,    49,    50,    71,    42,    43,    73,    17,    74,
      75,    78,    81,    87,    91,    92,    93,    94,    97,    95,
      48,    96,    99,   100,   101,   102,    85,     0,    72
};

static const yytype_int8 yycheck[] =
{
      18,     7,     9,    12,    11,    25,    11,    12,    23,    18,
       9,     7,     0,     8,    21,    14,     4,     5,    13,    13,
       8,     9,    10,    11,    20,    13,    14,    15,    13,    17,
      18,    19,    17,    13,    16,    23,     4,    25,     3,     7,
       8,     9,    14,    11,    13,    17,    45,    21,    24,    48,
      18,    13,    20,     4,    22,    23,     4,     8,     9,    13,
      19,     0,    18,    28,    21,     4,     5,    12,    36,     8,
       9,    10,    11,    12,    13,    14,    15,    16,    34,    18,
      19,    20,    21,    22,    17,    26,    12,    26,    12,    30,
       7,    30,    60,    19,    18,    19,    52,    53,     3,    23,
       4,    69,    12,     7,     8,     9,    12,    11,    18,    19,
       8,     4,    68,    19,    12,     8,     9,    21,    11,    12,
      11,     9,    13,    11,    13,     8,     9,    18,    11,    13,
      18,    13,    22,    13,    13,    18,    23,    23,    13,    20,
      13,    13,     7,    14,    20,    13,    13,    13,    71,    13,
      20,    20
      24,    89,    26,    27,    23,    18,    19,    29,    21,    12,
      12,    12,     8,     4,    12,    12,    24,    26,     4,    26,
      24,    27,    12,    12,    12,    12,    65,    -1,    40
};

/* YYSTOS[STATE-NUM] -- The symbol kind of the accessing symbol of
   state STATE-NUM.  */
static const yytype_int8 yystos[] =
{
       0,    27,     0,     4,     5,     8,     9,    10,    11,    13,
      14,    15,    17,    18,    19,    23,    25,    28,    29,    30,
      31,    32,    33,    34,    35,    36,    37,    38,    39,    40,
      21,    13,    13,     4,     7,     8,    20,    22,    23,    39,
      16,    14,    17,     4,     8,    13,    39,     3,    13,    21,
      24,    13,    13,    13,     8,    13,    13,    17,     8,    39,
       4,    39,    13,    13,     7,    20,    41,    22,    23,    23,
      20,    13,    13,    13,    13,    13,    41,    14,    20,    13,
      13,    20,    13,    20,    13
       0,    32,     0,     4,     5,     8,     9,    10,    11,    12,
      13,    14,    15,    16,    18,    19,    20,    21,    22,    26,
      30,    33,    34,    35,    36,    38,    39,    40,    41,    43,
      45,    46,    47,    48,    49,    50,    51,    52,    25,    37,
      12,    12,    18,    19,    51,     4,     7,     8,    24,    26,
      27,    17,    49,    49,    12,    19,     4,     8,    12,    50,
      51,     7,    53,    23,    28,    42,     3,    12,    23,    51,
      50,    23,    37,    29,    12,    12,     8,    12,    12,    51,
      51,     8,    50,    12,    19,    34,    44,     4,    12,    51,
      50,    12,    12,    24,    26,    26,    27,     4,    50,    12,
      12,    12,    12
};

/* YYR1[RULE-NUM] -- Symbol kind of the left-hand side of rule RULE-NUM.  */
static const yytype_int8 yyr1[] =
{
       0,    26,    27,    27,    28,    28,    28,    28,    28,    28,
      28,    28,    28,    29,    29,    29,    30,    30,    30,    30,
      31,    31,    31,    31,    31,    32,    32,    32,    32,    32,
      32,    32,    32,    32,    32,    33,    33,    34,    34,    34,
      34,    35,    36,    36,    37,    37,    37,    37,    37,    38,
      38,    39,    39,    39,    40,    41,    41
       0,    31,    32,    32,    33,    33,    33,    33,    33,    33,
      33,    33,    33,    34,    34,    35,    35,    36,    36,    36,
      36,    36,    36,    37,    37,    38,    38,    38,    38,    38,
      38,    39,    40,    40,    40,    40,    40,    40,    40,    40,
      40,    41,    41,    42,    42,    43,    43,    43,    44,    44,
      45,    45,    45,    46,    47,    47,    48,    48,    48,    48,
      48,    48,    49,    49,    50,    50,    50,    51,    51,    51,
      52,    53,    53
};

/* YYR2[RULE-NUM] -- Number of symbols on the right-hand side of rule RULE-NUM.  */
static const yytype_int8 yyr2[] =
{
       0,     2,     0,     2,     1,     1,     1,     1,     1,     1,
       1,     1,     1,     2,     4,     6,     2,     1,     1,     2,
       1,     2,     2,     3,     2,     3,     5,     1,     5,     5,
       2,     4,     2,     1,     3,     2,     3,    11,     3,     7,
       2,     4,     2,     1,     3,     2,     2,     3,     1,     1,
       1,     1,     1,     1,     1,     0,     1
       1,     1,     1,     5,     3,     2,     2,     2,     1,     1,
       3,     3,     2,     1,     2,     1,     2,     2,     4,     3,
       2,     5,     3,     5,     1,     5,     2,     4,     2,     1,
       3,     2,     3,     1,     1,     1,     1,     1,     1,     1,
       3,     2,     2,     4,     2,     1,     4,     3,     2,     2,
       3,     1,     1,     1,     1,     1,     1,     1,     1,     1,
       1,     0,     1
};


enum { YYENOMEM = -2 };

#define yyerrok         (yyerrstatus = 0)
#define yyclearin       (yychar = YYEMPTY)
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  YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
  yyerror_range[1] = yyloc;
  YY_REDUCE_PRINT (yyn);
  switch (yyn)
    {
  case 4: /* item: time  */
               {
	    yyHaveTime++;
	    yyIncrFlags(CLF_TIME);
	}
    break;

  case 5: /* item: zone  */
               {
	    yyHaveZone++;
	    yyIncrFlags(CLF_ZONE);
	}
    break;

  case 6: /* item: date  */
               {
	    yyHaveDate++;
	    yyIncrFlags(CLF_HAVEDATE);
	}
    break;

  case 7: /* item: ordMonth  */
                   {
	    yyHaveOrdinalMonth++;
	    yyIncrFlags(CLF_ORDINALMONTH);
	}
    break;

  case 8: /* item: day  */
              {
	    yyHaveDay++;
	    yyIncrFlags(CLF_DAYOFWEEK);
	}
    break;

  case 9: /* item: relspec  */
                  {
	    yyHaveRel++;
	    info->flags |= CLF_RELCONV;
	}
    break;

  case 10: /* item: iso  */
              {
	    yyHaveTime++;
	    yyIncrFlags(CLF_TIME|CLF_HAVEDATE);
	    yyHaveDate++;
	}
    break;

  case 11: /* item: trek  */
               {
	    yyIncrFlags(CLF_TIME|CLF_HAVEDATE);
	    info->flags |= CLF_RELCONV;
	}
    break;
	    yyHaveTime++;
	    yyHaveDate++;
	    yyHaveRel++;

  case 13: /* iextime: tUNUMBER ':' tUNUMBER ':' tUNUMBER  */
                                             {
	    yyHour = (yyvsp[-4].Number);
	    yyMinutes = (yyvsp[-2].Number);
	    yySeconds = (yyvsp[0].Number);
	}
    break;

  case 14: /* iextime: tUNUMBER ':' tUNUMBER  */
                                {
	    yyHour = (yyvsp[-2].Number);
	    yyMinutes = (yyvsp[0].Number);
	    yySeconds = 0;
	}
    break;

  case 13: /* time: tUNUMBER tMERIDIAN  */
  case 15: /* time: tUNUMBER tMERIDIAN  */
                             {
	    yyHour = (yyvsp[-1].Number);
	    yyMinutes = 0;
	    yySeconds = 0;
	    yyMeridian = (yyvsp[0].Meridian);
	}
    break;

  case 14: /* time: tUNUMBER ':' tUNUMBER o_merid  */
                                        {
	    yyHour = (yyvsp[-3].Number);
	    yyMinutes = (yyvsp[-1].Number);
	    yySeconds = 0;
	    yyMeridian = (yyvsp[0].Meridian);
	}
    break;

  case 16: /* time: iextime o_merid  */
  case 15: /* time: tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid  */
                                                     {
                          {
	    yyHour = (yyvsp[-5].Number);
	    yyMinutes = (yyvsp[-3].Number);
	    yySeconds = (yyvsp[-1].Number);
	    yyMeridian = (yyvsp[0].Meridian);
	}
    break;

  case 16: /* zone: tZONE tDST  */
  case 17: /* zone: tZONE tDST  */
                     {
	    yyTimezone = (yyvsp[-1].Number);
	    if (yyTimezone > HOUR( 12)) yyTimezone -= HOUR(100);
	    yyDSTmode = DSTon;
	}
    break;

  case 17: /* zone: tZONE  */
  case 18: /* zone: tZONE  */
                {
	    yyTimezone = (yyvsp[0].Number);
	    if (yyTimezone > HOUR( 12)) yyTimezone -= HOUR(100);
	    yyDSTmode = DSToff;
	}
    break;

  case 18: /* zone: tDAYZONE  */
  case 19: /* zone: tDAYZONE  */
                   {
	    yyTimezone = (yyvsp[0].Number);
	    yyDSTmode = DSTon;
	}
    break;

  case 20: /* zone: tZONEwO4 sign INTNUM  */
                               { /* GMT+0100, GMT-1000, etc. */
	    yyTimezone = (yyvsp[-2].Number) - (yyvsp[-1].Number)*((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60);
	    yyDSTmode = DSToff;
	}
    break;
  case 19: /* zone: sign tUNUMBER  */
                        {

  case 21: /* zone: tZONEwO2 sign INTNUM  */
                               { /* GMT+1, GMT-10, etc. */
	    yyTimezone = (yyvsp[-2].Number) - (yyvsp[-1].Number)*((yyvsp[0].Number) * 60);
	    yyDSTmode = DSToff;
	}
    break;

  case 22: /* zone: sign INTNUM  */
                      { /* +0100, -0100 */
	    yyTimezone = -(yyvsp[-1].Number)*((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60);
	    yyDSTmode = DSToff;
	}
    break;

  case 20: /* day: tDAY  */
  case 25: /* day: tDAY  */
               {
	    yyDayOrdinal = 1;
	    yyDayNumber = (yyvsp[0].Number);
	    yyDayOfWeek = (yyvsp[0].Number);
	}
    break;

  case 21: /* day: tDAY ','  */
                   {
  case 26: /* day: tDAY comma  */
                     {
	    yyDayOrdinal = 1;
	    yyDayNumber = (yyvsp[-1].Number);
	    yyDayOfWeek = (yyvsp[-1].Number);
	}
    break;

  case 22: /* day: tUNUMBER tDAY  */
  case 27: /* day: tUNUMBER tDAY  */
                        {
	    yyDayOrdinal = (yyvsp[-1].Number);
	    yyDayNumber = (yyvsp[0].Number);
	    yyDayOfWeek = (yyvsp[0].Number);
	}
    break;

  case 28: /* day: sign SP tUNUMBER tDAY  */
                                {
	    yyDayOrdinal = (yyvsp[-3].Number) * (yyvsp[-1].Number);
	    yyDayOfWeek = (yyvsp[0].Number);
	}
    break;

  case 23: /* day: sign tUNUMBER tDAY  */
  case 29: /* day: sign tUNUMBER tDAY  */
                             {
	    yyDayOrdinal = (yyvsp[-2].Number) * (yyvsp[-1].Number);
	    yyDayNumber = (yyvsp[0].Number);
	    yyDayOfWeek = (yyvsp[0].Number);
	}
    break;

  case 24: /* day: tNEXT tDAY  */
  case 30: /* day: tNEXT tDAY  */
                     {
	    yyDayOrdinal = 2;
	    yyDayOfWeek = (yyvsp[0].Number);
	}
    break;

  case 31: /* iexdate: tUNUMBER '-' tUNUMBER '-' tUNUMBER  */
                                             {
	    yyMonth = (yyvsp[-2].Number);
	    yyDayNumber = (yyvsp[0].Number);
	    yyDay = (yyvsp[0].Number);
	    yyYear = (yyvsp[-4].Number);
	}
    break;

  case 25: /* date: tUNUMBER '/' tUNUMBER  */
  case 32: /* date: tUNUMBER '/' tUNUMBER  */
                                {
	    yyMonth = (yyvsp[-2].Number);
	    yyDay = (yyvsp[0].Number);
	}
    break;

  case 26: /* date: tUNUMBER '/' tUNUMBER '/' tUNUMBER  */
  case 33: /* date: tUNUMBER '/' tUNUMBER '/' tUNUMBER  */
                                             {
	    yyMonth = (yyvsp[-4].Number);
	    yyDay = (yyvsp[-2].Number);
	    yyYear = (yyvsp[0].Number);
	}
    break;

  case 27: /* date: tISOBASE  */
                   {
	    yyYear = (yyvsp[0].Number) / 10000;
	    yyMonth = ((yyvsp[0].Number) % 10000)/100;
	    yyDay = (yyvsp[0].Number) % 100;
	}
    break;

  case 28: /* date: tUNUMBER '-' tMONTH '-' tUNUMBER  */
  case 35: /* date: tUNUMBER '-' tMONTH '-' tUNUMBER  */
                                           {
	    yyDay = (yyvsp[-4].Number);
	    yyMonth = (yyvsp[-2].Number);
	    yyYear = (yyvsp[0].Number);
	}
    break;

  case 29: /* date: tUNUMBER '-' tUNUMBER '-' tUNUMBER  */
                                             {
	    yyMonth = (yyvsp[-2].Number);
	    yyDay = (yyvsp[0].Number);
	    yyYear = (yyvsp[-4].Number);
	}
    break;

  case 30: /* date: tMONTH tUNUMBER  */
  case 36: /* date: tMONTH tUNUMBER  */
                          {
	    yyMonth = (yyvsp[-1].Number);
	    yyDay = (yyvsp[0].Number);
	}
    break;

  case 31: /* date: tMONTH tUNUMBER ',' tUNUMBER  */
                                       {
  case 37: /* date: tMONTH tUNUMBER comma tUNUMBER  */
                                         {
	    yyMonth = (yyvsp[-3].Number);
	    yyDay = (yyvsp[-2].Number);
	    yyYear = (yyvsp[0].Number);
	}
    break;

  case 32: /* date: tUNUMBER tMONTH  */
  case 38: /* date: tUNUMBER tMONTH  */
                          {
	    yyMonth = (yyvsp[0].Number);
	    yyDay = (yyvsp[-1].Number);
	}
    break;

  case 33: /* date: tEPOCH  */
  case 39: /* date: tEPOCH  */
                 {
	    yyMonth = 1;
	    yyDay = 1;
	    yyYear = EPOCH;
	}
    break;

  case 34: /* date: tUNUMBER tMONTH tUNUMBER  */
  case 40: /* date: tUNUMBER tMONTH tUNUMBER  */
                                   {
	    yyMonth = (yyvsp[-1].Number);
	    yyDay = (yyvsp[-2].Number);
	    yyYear = (yyvsp[0].Number);
	}
    break;

  case 35: /* ordMonth: tNEXT tMONTH  */
  case 41: /* ordMonth: tNEXT tMONTH  */
                       {
	    yyMonthOrdinal = 1;
	    yyMonth = (yyvsp[0].Number);
	    yyMonthOrdinalIncr = 1;
	    yyMonthOrdinal = (yyvsp[0].Number);
	}
    break;

  case 36: /* ordMonth: tNEXT tUNUMBER tMONTH  */
  case 42: /* ordMonth: tNEXT tUNUMBER tMONTH  */
                                {
	    yyMonthOrdinal = (yyvsp[-1].Number);
	    yyMonth = (yyvsp[0].Number);
	    yyMonthOrdinalIncr = (yyvsp[-1].Number);
	    yyMonthOrdinal = (yyvsp[0].Number);
	}
    break;

  case 37: /* iso: tUNUMBER '-' tUNUMBER '-' tUNUMBER tZONE tUNUMBER ':' tUNUMBER ':' tUNUMBER  */
                                                   {
  case 45: /* isodate: tISOBAS8  */
                   { /* YYYYMMDD */
	    if ((yyvsp[-5].Number) != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = (yyvsp[-10].Number);
	    yyMonth = (yyvsp[-8].Number);
	    yyDay = (yyvsp[-6].Number);
	    yyHour = (yyvsp[-4].Number);
	    yyMinutes = (yyvsp[-2].Number);
	    yySeconds = (yyvsp[0].Number);
	    yyYear = (yyvsp[0].Number) / 10000;
	    yyMonth = ((yyvsp[0].Number) % 10000)/100;
	    yyDay = (yyvsp[0].Number) % 100;
	}
    break;

  case 46: /* isodate: tISOBAS6  */
                   { /* YYMMDD */
	    yyYear = (yyvsp[0].Number) / 10000;
	    yyMonth = ((yyvsp[0].Number) % 10000)/100;
	    yyDay = (yyvsp[0].Number) % 100;
	}
    break;

  case 38: /* iso: tISOBASE tZONE tISOBASE  */
                                  {
  case 48: /* isotime: tISOBAS6  */
                   {
	    if ((yyvsp[-1].Number) != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = (yyvsp[-2].Number) / 10000;
	    yyMonth = ((yyvsp[-2].Number) % 10000)/100;
	    yyDay = (yyvsp[-2].Number) % 100;
	    yyHour = (yyvsp[0].Number) / 10000;
	    yyMinutes = ((yyvsp[0].Number) % 10000)/100;
	    yySeconds = (yyvsp[0].Number) % 100;
	}
    break;

  case 39: /* iso: tISOBASE tZONE tUNUMBER ':' tUNUMBER ':' tUNUMBER  */
  case 51: /* iso: tISOBASL tISOBAS6  */
                                                            {
	    if ((yyvsp[-5].Number) != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = (yyvsp[-6].Number) / 10000;
	    yyMonth = ((yyvsp[-6].Number) % 10000)/100;
	    yyDay = (yyvsp[-6].Number) % 100;
	    yyHour = (yyvsp[-4].Number);
	    yyMinutes = (yyvsp[-2].Number);
	    yySeconds = (yyvsp[0].Number);
	}
    break;

                            { /* YYYYMMDDhhmmss */
  case 40: /* iso: tISOBASE tISOBASE  */
                            {
	    yyYear = (yyvsp[-1].Number) / 10000;
	    yyMonth = ((yyvsp[-1].Number) % 10000)/100;
	    yyDay = (yyvsp[-1].Number) % 100;
	    yyHour = (yyvsp[0].Number) / 10000;
	    yyMinutes = ((yyvsp[0].Number) % 10000)/100;
	    yySeconds = (yyvsp[0].Number) % 100;
	}
    break;

  case 52: /* iso: tISOBASL tUNUMBER  */
                            { /* YYYYMMDDhhmm */
	    if (yyDigitCount != 4) YYABORT; /* normally unreached */
	    yyYear = (yyvsp[-1].Number) / 10000;
	    yyMonth = ((yyvsp[-1].Number) % 10000)/100;
	    yyDay = (yyvsp[-1].Number) % 100;
	    yyHour = (yyvsp[0].Number) / 100;
	    yyMinutes = ((yyvsp[0].Number) % 100);
	    yySeconds = 0;
	}
    break;

  case 41: /* trek: tSTARDATE tUNUMBER '.' tUNUMBER  */
                                          {
  case 53: /* trek: tSTARDATE INTNUM '.' tUNUMBER  */
                                        {
	    /*
	     * Offset computed year by -377 so that the returned years will be
	     * in a range accessible with a 32 bit clock seconds value.
	     */

	    yyYear = (yyvsp[-2].Number)/1000 + 2323 - 377;
	    yyDay  = 1;
	    yyMonth = 1;
	    yyRelDay += (((yyvsp[-2].Number)%1000)*(365 + IsLeapYear(yyYear)))/1000;
	    yyRelSeconds += (yyvsp[0].Number) * 144 * 60;
	    yyRelSeconds += (yyvsp[0].Number) * (144LL * 60LL);
	}
    break;

  case 42: /* relspec: relunits tAGO  */
  case 54: /* relspec: relunits tAGO  */
                        {
	    yyRelSeconds *= -1;
	    yyRelMonth *= -1;
	    yyRelDay *= -1;
	}
    break;

  case 56: /* relunits: sign SP INTNUM unit  */
                               {
	    *yyRelPointer += (yyvsp[-3].Number) * (yyvsp[-1].Number) * (yyvsp[0].Number);
	}
    break;

  case 44: /* relunits: sign tUNUMBER unit  */
                              {
  case 57: /* relunits: sign INTNUM unit  */
                           {
	    *yyRelPointer += (yyvsp[-2].Number) * (yyvsp[-1].Number) * (yyvsp[0].Number);
	}
    break;

  case 45: /* relunits: tUNUMBER unit  */
                        {
  case 58: /* relunits: INTNUM unit  */
                      {
	    *yyRelPointer += (yyvsp[-1].Number) * (yyvsp[0].Number);
	}
    break;

  case 46: /* relunits: tNEXT unit  */
  case 59: /* relunits: tNEXT unit  */
                     {
	    *yyRelPointer += (yyvsp[0].Number);
	}
    break;

  case 47: /* relunits: tNEXT tUNUMBER unit  */
                              {
  case 60: /* relunits: tNEXT INTNUM unit  */
                            {
	    *yyRelPointer += (yyvsp[-1].Number) * (yyvsp[0].Number);
	}
    break;

  case 48: /* relunits: unit  */
  case 61: /* relunits: unit  */
               {
	    *yyRelPointer += (yyvsp[0].Number);
	}
    break;

  case 49: /* sign: '-'  */
  case 62: /* sign: '-'  */
              {
	    (yyval.Number) = -1;
	}
    break;

  case 50: /* sign: '+'  */
  case 63: /* sign: '+'  */
              {
	    (yyval.Number) =  1;
	}
    break;

  case 51: /* unit: tSEC_UNIT  */
  case 64: /* unit: tSEC_UNIT  */
                    {
	    (yyval.Number) = (yyvsp[0].Number);
	    yyRelPointer = &yyRelSeconds;
	}
    break;

  case 52: /* unit: tDAY_UNIT  */
  case 65: /* unit: tDAY_UNIT  */
                    {
	    (yyval.Number) = (yyvsp[0].Number);
	    yyRelPointer = &yyRelDay;
	}
    break;

  case 53: /* unit: tMONTH_UNIT  */
  case 66: /* unit: tMONTH_UNIT  */
                      {
	    (yyval.Number) = (yyvsp[0].Number);
	    yyRelPointer = &yyRelMonth;
	}
    break;

  case 54: /* number: tUNUMBER  */
  case 67: /* INTNUM: tUNUMBER  */
                   {
	    (yyval.Number) = (yyvsp[0].Number);
	}
    break;
	    if (yyHaveTime && yyHaveDate && !yyHaveRel) {

  case 68: /* INTNUM: tISOBAS6  */
                   {
	    (yyval.Number) = (yyvsp[0].Number);
	}
    break;

  case 69: /* INTNUM: tISOBAS8  */
                   {
	    (yyval.Number) = (yyvsp[0].Number);
	}
    break;

  case 70: /* numitem: tUNUMBER  */
                   {
	    if ((info->flags & (CLF_TIME|CLF_HAVEDATE|CLF_RELCONV)) == (CLF_TIME|CLF_HAVEDATE)) {
		yyYear = (yyvsp[0].Number);
	    } else {
		yyHaveTime++;
		yyIncrFlags(CLF_TIME);
		if (yyDigitCount <= 2) {
		    yyHour = (yyvsp[0].Number);
		    yyMinutes = 0;
		} else {
		    yyHour = (yyvsp[0].Number) / 100;
		    yyMinutes = (yyvsp[0].Number) % 100;
		}
		yySeconds = 0;
		yyMeridian = MER24;
	    }
	}
    break;

  case 55: /* o_merid: %empty  */
  case 71: /* o_merid: %empty  */
                     {
	    (yyval.Meridian) = MER24;
	}
    break;

  case 56: /* o_merid: tMERIDIAN  */
  case 72: /* o_merid: tMERIDIAN  */
                    {
	    (yyval.Meridian) = (yyvsp[0].Meridian);
	}
    break;



2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2160
2161
2162
2163
2164
2165
2166














2167
2168
2169
2170
2171
2172
2173







-
-
-
-
-
-
-
-
-
-
-
-
-
-







    { "tomorrow",	tDAY_UNIT,	1 },
    { "yesterday",	tDAY_UNIT,	-1 },
    { "today",		tDAY_UNIT,	0 },
    { "now",		tSEC_UNIT,	0 },
    { "last",		tUNUMBER,	-1 },
    { "this",		tSEC_UNIT,	0 },
    { "next",		tNEXT,		1 },
#if 0
    { "first",		tUNUMBER,	1 },
    { "second",		tUNUMBER,	2 },
    { "third",		tUNUMBER,	3 },
    { "fourth",		tUNUMBER,	4 },
    { "fifth",		tUNUMBER,	5 },
    { "sixth",		tUNUMBER,	6 },
    { "seventh",	tUNUMBER,	7 },
    { "eighth",		tUNUMBER,	8 },
    { "ninth",		tUNUMBER,	9 },
    { "tenth",		tUNUMBER,	10 },
    { "eleventh",	tUNUMBER,	11 },
    { "twelfth",	tUNUMBER,	12 },
#endif
    { "ago",		tAGO,		1 },
    { "epoch",		tEPOCH,		0 },
    { "stardate",	tSTARDATE,	0 },
    { NULL, 0, 0 }
};

/*
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295

























2296
2297










2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309



2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326

2327
2328
2329
2330



2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341

2342
2343
2344
2345
2346

2347
2348
2349
2350
2351

2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372

2373
2374
2375
2376

2377
2378
2379
2380
2381
2382
2383
2259
2260
2261
2262
2263
2264
2265

























2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
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2284
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2287
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2289
2290
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2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333

2334
2335



2336
2337
2338
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2341
2342
2343
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2345
2346
2347
2348

2349
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2354
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2359
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2367
2368
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2370
2371
2372
2373
2374
2375
2376
2377
2378
2379

2380
2381
2382
2383

2384
2385
2386
2387
2388
2389
2390
2391







-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+


+
+
+
+
+
+
+
+
+
+












+
+
+
















-
+

-
-
-
+
+
+










-
+




-
+




-
+




















-
+



-
+







};

/*
 * Military timezone table.
 */

static const TABLE MilitaryTable[] = {
    { "a",	tZONE,	-HOUR( 1) + HOUR(100) },
    { "b",	tZONE,	-HOUR( 2) + HOUR(100) },
    { "c",	tZONE,	-HOUR( 3) + HOUR(100) },
    { "d",	tZONE,	-HOUR( 4) + HOUR(100) },
    { "e",	tZONE,	-HOUR( 5) + HOUR(100) },
    { "f",	tZONE,	-HOUR( 6) + HOUR(100) },
    { "g",	tZONE,	-HOUR( 7) + HOUR(100) },
    { "h",	tZONE,	-HOUR( 8) + HOUR(100) },
    { "i",	tZONE,	-HOUR( 9) + HOUR(100) },
    { "k",	tZONE,	-HOUR(10) + HOUR(100) },
    { "l",	tZONE,	-HOUR(11) + HOUR(100) },
    { "m",	tZONE,	-HOUR(12) + HOUR(100) },
    { "n",	tZONE,	HOUR(  1) + HOUR(100) },
    { "o",	tZONE,	HOUR(  2) + HOUR(100) },
    { "p",	tZONE,	HOUR(  3) + HOUR(100) },
    { "q",	tZONE,	HOUR(  4) + HOUR(100) },
    { "r",	tZONE,	HOUR(  5) + HOUR(100) },
    { "s",	tZONE,	HOUR(  6) + HOUR(100) },
    { "t",	tZONE,	HOUR(  7) + HOUR(100) },
    { "u",	tZONE,	HOUR(  8) + HOUR(100) },
    { "v",	tZONE,	HOUR(  9) + HOUR(100) },
    { "w",	tZONE,	HOUR( 10) + HOUR(100) },
    { "x",	tZONE,	HOUR( 11) + HOUR(100) },
    { "y",	tZONE,	HOUR( 12) + HOUR(100) },
    { "z",	tZONE,	HOUR( 0)  + HOUR(100) },
    { "a",	tZONE,	-HOUR( 1) },
    { "b",	tZONE,	-HOUR( 2) },
    { "c",	tZONE,	-HOUR( 3) },
    { "d",	tZONE,	-HOUR( 4) },
    { "e",	tZONE,	-HOUR( 5) },
    { "f",	tZONE,	-HOUR( 6) },
    { "g",	tZONE,	-HOUR( 7) },
    { "h",	tZONE,	-HOUR( 8) },
    { "i",	tZONE,	-HOUR( 9) },
    { "k",	tZONE,	-HOUR(10) },
    { "l",	tZONE,	-HOUR(11) },
    { "m",	tZONE,	-HOUR(12) },
    { "n",	tZONE,	HOUR(  1) },
    { "o",	tZONE,	HOUR(  2) },
    { "p",	tZONE,	HOUR(  3) },
    { "q",	tZONE,	HOUR(  4) },
    { "r",	tZONE,	HOUR(  5) },
    { "s",	tZONE,	HOUR(  6) },
    { "t",	tZONE,	HOUR(  7) },
    { "u",	tZONE,	HOUR(  8) },
    { "v",	tZONE,	HOUR(  9) },
    { "w",	tZONE,	HOUR( 10) },
    { "x",	tZONE,	HOUR( 11) },
    { "y",	tZONE,	HOUR( 12) },
    { "z",	tZONE,	HOUR( 0) },
    { NULL, 0, 0 }
};

static inline const char *
bypassSpaces(
    const char *s)
{
    while (TclIsSpaceProc(*s)) {
	s++;
    }
    return s;
}

/*
 * Dump error messages in the bit bucket.
 */

static void
TclDateerror(
    YYLTYPE* location,
    DateInfo* infoPtr,
    const char *s)
{
    Tcl_Obj* t;
    if (!infoPtr->messages) {
	TclNewObj(infoPtr->messages);
    }
    Tcl_AppendToObj(infoPtr->messages, infoPtr->separatrix, -1);
    Tcl_AppendToObj(infoPtr->messages, s, -1);
    Tcl_AppendToObj(infoPtr->messages, " (characters ", -1);
    TclNewIntObj(t, location->first_column);
    Tcl_IncrRefCount(t);
    Tcl_AppendObjToObj(infoPtr->messages, t);
    Tcl_DecrRefCount(t);
    Tcl_AppendToObj(infoPtr->messages, "-", -1);
    TclNewIntObj(t, location->last_column);
    Tcl_IncrRefCount(t);
    Tcl_AppendObjToObj(infoPtr->messages, t);
    Tcl_DecrRefCount(t);
    Tcl_AppendToObj(infoPtr->messages, ")", -1);
    infoPtr->separatrix = "\n";
}

static time_t
int
ToSeconds(
    time_t Hours,
    time_t Minutes,
    time_t Seconds,
    int Hours,
    int Minutes,
    int Seconds,
    MERIDIAN Meridian)
{
    if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) {
	return -1;
    }
    switch (Meridian) {
    case MER24:
	if (Hours < 0 || Hours > 23) {
	    return -1;
	}
	return (Hours * 60L + Minutes) * 60L + Seconds;
	return (Hours * 60 + Minutes) * 60 + Seconds;
    case MERam:
	if (Hours < 1 || Hours > 12) {
	    return -1;
	}
	return ((Hours % 12) * 60L + Minutes) * 60L + Seconds;
	return ((Hours % 12) * 60 + Minutes) * 60 + Seconds;
    case MERpm:
	if (Hours < 1 || Hours > 12) {
	    return -1;
	}
	return (((Hours % 12) + 12) * 60L + Minutes) * 60L + Seconds;
	return (((Hours % 12) + 12) * 60 + Minutes) * 60 + Seconds;
    }
    return -1;			/* Should never be reached */
}

static int
LookupWord(
    YYSTYPE* yylvalPtr,
    char *buff)
{
    char *p;
    char *q;
    const TABLE *tp;
    int i, abbrev;

    /*
     * Make it lowercase.
     */

    Tcl_UtfToLower(buff);

    if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) {
    if (*buff == 'a' && (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0)) {
	yylvalPtr->Meridian = MERam;
	return tMERIDIAN;
    }
    if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) {
    if (*buff == 'p' && (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0)) {
	yylvalPtr->Meridian = MERpm;
	return tMERIDIAN;
    }

    /*
     * See if we have an abbreviation for a month.
     */
2483
2484
2485
2486
2487
2488
2489

2490
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2492
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2494
2495
2496











2497

2498
2499

2500
2501
2502
2503
2504
2505












2506
2507
2508
2509
2510














2511
2512
2513
2514
2515
2516
2517




2518
2519
2520
2521
2522









2523

2524
2525
2526

2527
2528
2529
2530
2531
2532
2533































2534
2535
2536
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2538
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2543
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2545
2546
2547
2548
2549
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2552
2553

2554
2555

2556
2557
2558

2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573







2574
2575
2576


2577
2578
2579
2580
2581
2582
2583

2584
2585
2586
2587
2588

2589
2590
2591

2592
2593

2594
2595

2596

2597
2598
2599
2600
2601
2602
2603


2604
















2605
2606
2607
2608






2609
2610
2611
2612
2613

2614
2615
2616
2617
2618
2619
2620
2621

2622

2623
2624


2625
2626
2627
2628
2629
2630
2631
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2635
2636
2637
2638
2639
2640
2641
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2650
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2680
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2682
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2688
2689
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2693
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2700
2701
2702
2703
2704
2705
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2707
2708
2709
2710
2711
2712
2713
2714
2715

2716
2717
2718
2719
2720
2721
2722
2723
2724
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501




2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515

2516
2517





2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529





2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546




2547
2548
2549
2550





2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563

2564
2565
2566
2567
2568
2569
2570

2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
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2596
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2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620

2621
2622

2623

2624

2625

2626




2627
2628







2629
2630
2631
2632
2633
2634
2635



2636
2637







2638


2639


2640
2641


2642
2643

2644

2645
2646

2647

2648





2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667




2668
2669
2670
2671
2672
2673
2674
2675

2676

2677
2678
2679
2680
2681
2682

2683

2684
2685
2686


2687
2688



























































































2689
2690
2691
2692
2693
2694
2695
2696
2697
2698







+



-
-
-
-
+
+
+
+
+
+
+
+
+
+
+

+

-
+

-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+



-
-
-
-
+
+
+
+
-
-
-
-
-
+
+
+
+
+
+
+
+
+

+


-
+






-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+



















-
+

-
+
-

-
+
-

-
-
-
-


-
-
-
-
-
-
-
+
+
+
+
+
+
+
-
-
-
+
+
-
-
-
-
-
-
-
+
-
-

-
-
+

-
-
+

-
+
-

+
-
+
-

-
-
-
-
-
+
+

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
+
+
+
+
+
+


-

-
+





-

-
+

+
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+









    YYLTYPE* location,
    DateInfo *info)
{
    char c;
    char *p;
    char buff[20];
    int Count;
    const char *tokStart;

    location->first_column = yyInput - info->dateStart;
    for ( ; ; ) {
	while (TclIsSpaceProcM(*yyInput)) {
	    yyInput++;
	}


	if (isspace(UCHAR(*yyInput))) {
	    yyInput = bypassSpaces(yyInput);
	    /* ignore space at end of text and before some words */
	    c = *yyInput;
	    if (c != '\0' && !isalpha(UCHAR(c))) {
		return SP;
	    }
	}
	tokStart = yyInput;

	if (isdigit(UCHAR(c = *yyInput))) { /* INTL: digit */

	    /*
	     * Convert the string into a number; count the number of digits.
	     * Count the number of digits.
	     */

	    Count = 0;
	    for (yylvalPtr->Number = 0;
		    isdigit(UCHAR(c = *yyInput++)); ) {	  /* INTL: digit */
		yylvalPtr->Number = 10 * yylvalPtr->Number + c - '0';
	    p = (char *)yyInput;
	    while (isdigit(UCHAR(*++p))) {};
	    yyDigitCount = p - yyInput;
	    /*
	     * A number with 12 or 14 digits is considered an ISO 8601 date.
	     */
	    if (yyDigitCount == 14 || yyDigitCount == 12) {
		/* long form of ISO 8601 (without separator), either
		 * YYYYMMDDhhmmss or YYYYMMDDhhmm, so reduce to date
		 * (8 chars is isodate) */
		p = (char *)yyInput+8;
		if (TclAtoWIe(&yylvalPtr->Number, yyInput, p, 1) != TCL_OK) {
		Count++;
	    }
	    yyInput--;
	    yyDigitCount = Count;

		    return tID; /* overflow*/
		}
		yyDigitCount = 8;
		yyInput = p;
		location->last_column = yyInput - info->dateStart - 1;
		return tISOBASL;
	    }
	    /*
	     * Convert the string into a number
	     */
	    if (TclAtoWIe(&yylvalPtr->Number, yyInput, p, 1) != TCL_OK) {
		return tID; /* overflow*/
	    }
	    yyInput = p;
	    /*
	     * A number with 6 or more digits is considered an ISO 8601 base.
	     */

	    if (Count >= 6) {
		location->last_column = yyInput - info->dateStart - 1;
		return tISOBASE;
	    location->last_column = yyInput - info->dateStart - 1;
	    if (yyDigitCount >= 6) {
		if (yyDigitCount == 8) {
		    return tISOBAS8;
	    } else {
		location->last_column = yyInput - info->dateStart - 1;
		return tUNUMBER;
	    }
	}
		}
		if (yyDigitCount == 6) {
		    return tISOBAS6;
		}
	    }
	    /* ignore spaces after digits (optional) */
	    yyInput = bypassSpaces(yyInput);
	    return tUNUMBER;
	}
	if (!(c & 0x80) && isalpha(UCHAR(c))) {		  /* INTL: ISO only. */
	    int ret;
	    for (p = buff; isalpha(UCHAR(c = *yyInput++)) /* INTL: ISO only. */
		     || c == '.'; ) {
		if (p < &buff[sizeof buff - 1]) {
		if (p < &buff[sizeof(buff) - 1]) {
		    *p++ = c;
		}
	    }
	    *p = '\0';
	    yyInput--;
	    location->last_column = yyInput - info->dateStart - 1;
	    return LookupWord(yylvalPtr, buff);
	    ret = LookupWord(yylvalPtr, buff);
	    /*
	     * lookahead:
	     *	for spaces to consider word boundaries (for instance
	     *	literal T in isodateTisotimeZ is not a TZ, but Z is UTC);
	     *	for +/- digit, to differentiate between "GMT+1000 day" and "GMT +1000 day";
	     * bypass spaces after token (but ignore by TZ+OFFS), because should
	     * recognize next SP token, if TZ only.
	     */
	    if (ret == tZONE || ret == tDAYZONE) {
		c = *yyInput;
		if (isdigit(UCHAR(c))) { /* literal not a TZ  */
		    yyInput = tokStart;
		    return *yyInput++;
		}
		if ((c == '+' || c == '-') && isdigit(UCHAR(*(yyInput+1)))) {
		    if ( !isdigit(UCHAR(*(yyInput+2)))
		      || !isdigit(UCHAR(*(yyInput+3)))) {
			/* GMT+1, GMT-10, etc. */
			return tZONEwO2;
		    }
		    if ( isdigit(UCHAR(*(yyInput+4)))
		      && !isdigit(UCHAR(*(yyInput+5)))) {
			/* GMT+1000, etc. */
			return tZONEwO4;
		    }
		}
	    }
	    yyInput = bypassSpaces(yyInput);
	    return ret;

	}
	if (c != '(') {
	    location->last_column = yyInput - info->dateStart;
	    return *yyInput++;
	}
	Count = 0;
	do {
	    c = *yyInput++;
	    if (c == '\0') {
		location->last_column = yyInput - info->dateStart - 1;
		return c;
	    } else if (c == '(') {
		Count++;
	    } else if (c == ')') {
		Count--;
	    }
	} while (Count > 0);
    }
}


int
TclClockOldscanObjCmd(
TclClockFreeScan(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Count of parameters */
    DateInfo *info)		/* Input and result parameters */
    Tcl_Obj *const *objv)	/* Parameters */
{
    Tcl_Obj *result, *resultElement;
    int yr, mo, da;
    DateInfo dateInfo;
    DateInfo* info = &dateInfo;
    int status;

    if (objc != 5) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"stringToParse baseYear baseMonth baseDay" );
	return TCL_ERROR;
    }

    yyInput = TclGetString(objv[1]);
  #if YYDEBUG
    /* enable debugging if compiled with YYDEBUG */
    yydebug = 1;
  #endif

    /*
     * yyInput = stringToParse;
    dateInfo.dateStart = yyInput;

    yyHaveDate = 0;
     *
     * ClockInitDateInfo(info) should be executed to pre-init info;
    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
	return TCL_ERROR;
    }
    yyYear = yr; yyMonth = mo; yyDay = da;

     */
    yyHaveTime = 0;
    yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24;

    yyHaveZone = 0;
    yyTimezone = 0; yyDSTmode = DSTmaybe;
    yyDSTmode = DSTmaybe;

    yyHaveOrdinalMonth = 0;
    yyMonthOrdinal = 0;
    info->separatrix = "";

    yyHaveDay = 0;
    info->dateStart = yyInput;
    yyDayOrdinal = 0; yyDayNumber = 0;

    /* ignore spaces at begin */
    yyHaveRel = 0;
    yyInput = bypassSpaces(yyInput);
    yyRelMonth = 0; yyRelDay = 0; yyRelSeconds = 0; yyRelPointer = NULL;

    TclNewObj(dateInfo.messages);
    dateInfo.separatrix = "";
    Tcl_IncrRefCount(dateInfo.messages);

    status = yyparse(&dateInfo);
    /* parse */
    status = yyparse(info);
    if (status == 1) {
    	const char *msg = NULL;
	if (info->errFlags & CLF_HAVEDATE) {
	    msg = "more than one date in string";
	} else if (info->errFlags & CLF_TIME) {
	    msg = "more than one time of day in string";
	} else if (info->errFlags & CLF_ZONE) {
	    msg = "more than one time zone in string";
	} else if (info->errFlags & CLF_DAYOFWEEK) {
	    msg = "more than one weekday in string";
	} else if (info->errFlags & CLF_ORDINALMONTH) {
	    msg = "more than one ordinal month in string";
	}
	if (msg) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(msg, -1));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	} else {
	Tcl_SetObjResult(interp, dateInfo.messages);
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", (char *)NULL);
	return TCL_ERROR;
	    Tcl_SetObjResult(interp,
		info->messages ? info->messages : Tcl_NewObj());
	    info->messages = NULL;
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", (char *)NULL);
	}
	status = TCL_ERROR;
    } else if (status == 2) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("memory exhausted", -1));
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "MEMORY", (char *)NULL);
	return TCL_ERROR;
	status = TCL_ERROR;
    } else if (status != 0) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("Unknown status returned "
						  "from date parser. Please "
						  "report this error as a "
						  "bug in Tcl.", -1));
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "BUG", (char *)NULL);
	return TCL_ERROR;
	status = TCL_ERROR;
    }
    if (info->messages) {
    Tcl_DecrRefCount(dateInfo.messages);

	Tcl_DecrRefCount(info->messages);
    }
    if (yyHaveDate > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one date in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveTime > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one time of day in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveZone > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one time zone in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveDay > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one weekday in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveOrdinalMonth > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one ordinal month in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }

    TclNewObj(result);
    TclNewObj(resultElement);
    if (yyHaveDate) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyYear));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonth));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDay));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    if (yyHaveTime) {
	Tcl_ListObjAppendElement(interp, result, Tcl_NewIntObj(
		ToSeconds(yyHour, yyMinutes, yySeconds, (MERIDIAN)yyMeridian)));
    } else {
	TclNewObj(resultElement);
	Tcl_ListObjAppendElement(interp, result, resultElement);
    }

    TclNewObj(resultElement);
    if (yyHaveZone) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(-yyTimezone));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(1 - yyDSTmode));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveRel) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelMonth));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelDay));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelSeconds));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveDay && !yyHaveDate) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDayOrdinal));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDayNumber));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveOrdinalMonth) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonthOrdinal));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonth));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    Tcl_SetObjResult(interp, result);
    return TCL_OK;
    return status;
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

Added generic/tclDate.h.
































































































































































































































































































































































































































































































































































































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/*
 * tclDate.h --
 *
 *	This header file handles common usage of clock primitives
 *	between tclDate.c (yacc), tclClock.c and tclClockFmt.c.
 *
 * Copyright (c) 2014 Serg G. Brester (aka sebres)
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#ifndef _TCLCLOCK_H
#define _TCLCLOCK_H

/*
 * Constants
 */

#define JULIAN_DAY_POSIX_EPOCH		2440588
#define GREGORIAN_CHANGE_DATE		2361222
#define SECONDS_PER_DAY			86400
#define JULIAN_SEC_POSIX_EPOCH	      (((Tcl_WideInt) JULIAN_DAY_POSIX_EPOCH) \
					* SECONDS_PER_DAY)
#define FOUR_CENTURIES			146097	/* days */
#define JDAY_1_JAN_1_CE_JULIAN		1721424
#define JDAY_1_JAN_1_CE_GREGORIAN	1721426
#define ONE_CENTURY_GREGORIAN		36524	/* days */
#define FOUR_YEARS			1461	/* days */
#define ONE_YEAR			365	/* days */

#define RODDENBERRY			1946	/* Another epoch (Hi, Jeff!) */


#define CLF_OPTIONAL	       (1 << 0) /* token is non mandatory */
#define CLF_POSIXSEC	       (1 << 1)
#define CLF_LOCALSEC	       (1 << 2)
#define CLF_JULIANDAY	       (1 << 3)
#define CLF_TIME	       (1 << 4)
#define CLF_ZONE	       (1 << 5)
#define CLF_CENTURY	       (1 << 6)
#define CLF_DAYOFMONTH	       (1 << 7)
#define CLF_DAYOFYEAR	       (1 << 8)
#define CLF_MONTH	       (1 << 9)
#define CLF_YEAR	       (1 << 10)
#define CLF_DAYOFWEEK	       (1 << 11)
#define CLF_ISO8601YEAR	       (1 << 12)
#define CLF_ISO8601WEAK	       (1 << 13)
#define CLF_ISO8601CENTURY     (1 << 14)

#define CLF_SIGNED	       (1 << 15)

/* extra flags used outside of scan/format-tokens too (int, not a short int) */
#define CLF_RELCONV	       (1 << 17)
#define CLF_ORDINALMONTH       (1 << 18)

/* On demand (lazy) assemble flags */
#define CLF_ASSEMBLE_DATE      (1 << 28) /* assemble year, month, etc. using julianDay */
#define CLF_ASSEMBLE_JULIANDAY (1 << 29) /* assemble julianDay using year, month, etc. */
#define CLF_ASSEMBLE_SECONDS   (1 << 30) /* assemble localSeconds (and seconds at end) */

#define CLF_HAVEDATE	       (CLF_DAYOFMONTH|CLF_MONTH|CLF_YEAR)
#define CLF_DATE	       (CLF_JULIANDAY | CLF_DAYOFMONTH | CLF_DAYOFYEAR | \
				CLF_MONTH | CLF_YEAR | CLF_ISO8601YEAR | \
				CLF_DAYOFWEEK | CLF_ISO8601WEAK)

#define TCL_MIN_SECONDS			-0x00F0000000000000L
#define TCL_MAX_SECONDS			 0x00F0000000000000L
#define TCL_INV_SECONDS			(TCL_MIN_SECONDS-1)

/*
 * Enumeration of the string literals used in [clock]
 */

typedef enum ClockLiteral {
    LIT__NIL,
    LIT__DEFAULT_FORMAT,
    LIT_SYSTEM,		LIT_CURRENT,		LIT_C,
    LIT_BCE,		LIT_CE,
    LIT_DAYOFMONTH,	LIT_DAYOFWEEK,		LIT_DAYOFYEAR,
    LIT_ERA,		LIT_GMT,		LIT_GREGORIAN,
    LIT_INTEGER_VALUE_TOO_LARGE,
    LIT_ISO8601WEEK,	LIT_ISO8601YEAR,
    LIT_JULIANDAY,	LIT_LOCALSECONDS,
    LIT_MONTH,
    LIT_SECONDS,	LIT_TZNAME,		LIT_TZOFFSET,
    LIT_YEAR,
    LIT_TZDATA,
    LIT_GETSYSTEMTIMEZONE,
    LIT_SETUPTIMEZONE,
    LIT_MCGET,
    LIT_GETSYSTEMLOCALE, LIT_GETCURRENTLOCALE,
    LIT_LOCALIZE_FORMAT,
    LIT__END
} ClockLiteral;

#define CLOCK_LITERAL_ARRAY(litarr) static const char *const litarr[] = { \
    "", \
    "%a %b %d %H:%M:%S %Z %Y", \
    "system",		"current",		"C", \
    "BCE",		"CE", \
    "dayOfMonth",	"dayOfWeek",		"dayOfYear", \
    "era",		":GMT",			"gregorian", \
    "integer value too large to represent", \
    "iso8601Week",	"iso8601Year", \
    "julianDay",	"localSeconds", \
    "month", \
    "seconds",		"tzName",		"tzOffset", \
    "year", \
    "::tcl::clock::TZData", \
    "::tcl::clock::GetSystemTimeZone", \
    "::tcl::clock::SetupTimeZone", \
    "::tcl::clock::mcget", \
    "::tcl::clock::GetSystemLocale", "::tcl::clock::mclocale", \
    "::tcl::clock::LocalizeFormat" \
}

/*
 * Enumeration of the msgcat literals used in [clock]
 */

typedef enum ClockMsgCtLiteral {
    MCLIT__NIL, /* placeholder */
    MCLIT_MONTHS_FULL,	MCLIT_MONTHS_ABBREV,  MCLIT_MONTHS_COMB,
    MCLIT_DAYS_OF_WEEK_FULL,  MCLIT_DAYS_OF_WEEK_ABBREV,  MCLIT_DAYS_OF_WEEK_COMB,
    MCLIT_AM,  MCLIT_PM,
    MCLIT_LOCALE_ERAS,
    MCLIT_BCE,	 MCLIT_CE,
    MCLIT_BCE2,	 MCLIT_CE2,
    MCLIT_BCE3,	 MCLIT_CE3,
    MCLIT_LOCALE_NUMERALS,
    MCLIT__END
} ClockMsgCtLiteral;

#define CLOCK_LOCALE_LITERAL_ARRAY(litarr, pref) static const char *const litarr[] = { \
    pref "", \
    pref "MONTHS_FULL", pref "MONTHS_ABBREV", pref "MONTHS_COMB", \
    pref "DAYS_OF_WEEK_FULL", pref "DAYS_OF_WEEK_ABBREV", pref "DAYS_OF_WEEK_COMB", \
    pref "AM", pref "PM", \
    pref "LOCALE_ERAS", \
    pref "BCE",	   pref "CE", \
    pref "b.c.e.", pref "c.e.", \
    pref "b.c.",   pref "a.d.", \
    pref "LOCALE_NUMERALS", \
}

/*
 * Structure containing the fields used in [clock format] and [clock scan]
 */

#define CLF_CTZ		(1 << 4)

typedef struct TclDateFields {

    /* Cacheable fields:	 */

    Tcl_WideInt seconds;	/* Time expressed in seconds from the Posix
				 * epoch */
    Tcl_WideInt localSeconds;	/* Local time expressed in nominal seconds
				 * from the Posix epoch */
    int tzOffset;		/* Time zone offset in seconds east of
				 * Greenwich */
    Tcl_WideInt julianDay;	/* Julian Day Number in local time zone */
    int isBce;			/* 1 if BCE */
    int gregorian;		/* Flag == 1 if the date is Gregorian */
    int year;			/* Year of the era */
    int dayOfYear;		/* Day of the year (1 January == 1) */
    int month;			/* Month number */
    int dayOfMonth;		/* Day of the month */
    int iso8601Year;		/* ISO8601 week-based year */
    int iso8601Week;		/* ISO8601 week number */
    int dayOfWeek;		/* Day of the week */
    int hour;			/* Hours of day (in-between time only calculation) */
    int minutes;		/* Minutes of hour (in-between time only calculation) */
    Tcl_WideInt secondOfMin;	/* Seconds of minute (in-between time only calculation) */
    Tcl_WideInt secondOfDay;	/* Seconds of day (in-between time only calculation) */

    int flags;			/* 0 or CLF_CTZ */

    /* Non cacheable fields:	 */

    Tcl_Obj *tzName;		/* Name (or corresponding DST-abbreviation) of the
				 * time zone, if set the refCount is incremented */
} TclDateFields;

#define ClockCacheableDateFieldsSize \
    offsetof(TclDateFields, tzName)

/*
 * Meridian: am, pm, or 24-hour style.
 */

typedef enum _MERIDIAN {
    MERam, MERpm, MER24
} MERIDIAN;

/*
 * Structure contains return parsed fields.
 */

typedef struct DateInfo {
    const char *dateStart;
    const char *dateInput;
    const char *dateEnd;

    TclDateFields date;

    int		flags;		/* Signals parts of date/time get found */
    int		errFlags;	/* Signals error (part of date/time found twice) */

    MERIDIAN dateMeridian;

    int dateTimezone;
    int dateDSTmode;

    Tcl_WideInt dateRelMonth;
    Tcl_WideInt dateRelDay;
    Tcl_WideInt dateRelSeconds;

    int dateMonthOrdinalIncr;
    int dateMonthOrdinal;

    int dateDayOrdinal;

    Tcl_WideInt *dateRelPointer;

    int dateSpaceCount;
    int dateDigitCount;

    int dateCentury;

    Tcl_Obj* messages;	    /* Error messages */
    const char* separatrix; /* String separating messages */
} DateInfo;

#define yydate	    (info->date)  /* Date fields used for converting */

#define yyDay	    (info->date.dayOfMonth)
#define yyMonth	    (info->date.month)
#define yyYear	    (info->date.year)

#define yyHour	    (info->date.hour)
#define yyMinutes   (info->date.minutes)
#define yySeconds   (info->date.secondOfMin)
#define yySecondOfDay (info->date.secondOfDay)

#define yyDSTmode   (info->dateDSTmode)
#define yyDayOrdinal	(info->dateDayOrdinal)
#define yyDayOfWeek (info->date.dayOfWeek)
#define yyMonthOrdinalIncr  (info->dateMonthOrdinalIncr)
#define yyMonthOrdinal	(info->dateMonthOrdinal)
#define yyTimezone  (info->dateTimezone)
#define yyMeridian  (info->dateMeridian)
#define yyRelMonth  (info->dateRelMonth)
#define yyRelDay    (info->dateRelDay)
#define yyRelSeconds	(info->dateRelSeconds)
#define yyRelPointer	(info->dateRelPointer)
#define yyInput	    (info->dateInput)
#define yyDigitCount	(info->dateDigitCount)
#define yySpaceCount	(info->dateSpaceCount)

static inline void
ClockInitDateInfo(DateInfo *info) {
    memset(info, 0, sizeof(DateInfo));
}

/*
 * Structure containing the command arguments supplied to [clock format] and [clock scan]
 */

#define CLF_VALIDATE_S1	(1 << 0)
#define CLF_VALIDATE_S2	(1 << 1)
#define CLF_VALIDATE	(CLF_VALIDATE_S1|CLF_VALIDATE_S2)
#define CLF_EXTENDED	(1 << 4)
#define CLF_STRICT	(1 << 8)
#define CLF_LOCALE_USED (1 << 15)

typedef struct ClockFmtScnCmdArgs {
    void *clientData;  /* Opaque pointer to literal pool, etc. */
    Tcl_Interp *interp;	    /* Tcl interpreter */

    Tcl_Obj *formatObj;	    /* Format */
    Tcl_Obj *localeObj;	    /* Name of the locale where the time will be expressed. */
    Tcl_Obj *timezoneObj;   /* Default time zone in which the time will be expressed */
    Tcl_Obj *baseObj;	    /* Base (scan and add) or clockValue (format) */
    int	     flags;	    /* Flags control scanning */

    Tcl_Obj *mcDictObj;	    /* Current dictionary of tcl::clock package for given localeObj*/
} ClockFmtScnCmdArgs;

/* Last-period cache for fast UTC to local and backwards conversion */
typedef struct ClockLastTZOffs {
    /* keys */
    Tcl_Obj    *timezoneObj;
    int		changeover;
    Tcl_WideInt localSeconds;
    Tcl_WideInt rangesVal[2];   /* Bounds for cached time zone offset */
    /* values */
    int		tzOffset;
    Tcl_Obj    *tzName;		/* Name (abbreviation) of this area in TZ */
} ClockLastTZOffs;

/*
 * Structure containing the client data for [clock]
 */

typedef struct ClockClientData {
    size_t    refCount;		/* Number of live references. */
    Tcl_Obj **literals;		/* Pool of object literals (common, locale independent). */
    Tcl_Obj **mcLiterals;	/* Msgcat object literals with mc-keys for search with locale. */
    Tcl_Obj **mcLitIdxs;	/* Msgcat object indices prefixed with _IDX_,
				 * used for quick dictionary search */

    Tcl_Obj *mcDicts;		/* Msgcat collection, contains weak pointers to locale
				 * catalogs, and owns it references (onetime referenced) */

    /* Cache for current clock parameters, imparted via "configure" */
    size_t lastTZEpoch;
    int currentYearCentury;
    int yearOfCenturySwitch;
    int validMinYear;
    int validMaxYear;
    double maxJDN;

    Tcl_Obj *systemTimeZone;
    Tcl_Obj *systemSetupTZData;
    Tcl_Obj *gmtSetupTimeZoneUnnorm;
    Tcl_Obj *gmtSetupTimeZone;
    Tcl_Obj *gmtSetupTZData;
    Tcl_Obj *gmtTZName;
    Tcl_Obj *lastSetupTimeZoneUnnorm;
    Tcl_Obj *lastSetupTimeZone;
    Tcl_Obj *lastSetupTZData;
    Tcl_Obj *prevSetupTimeZoneUnnorm;
    Tcl_Obj *prevSetupTimeZone;
    Tcl_Obj *prevSetupTZData;

    Tcl_Obj *defaultLocale;
    Tcl_Obj *defaultLocaleDict;
    Tcl_Obj *currentLocale;
    Tcl_Obj *currentLocaleDict;
    Tcl_Obj *lastUsedLocaleUnnorm;
    Tcl_Obj *lastUsedLocale;
    Tcl_Obj *lastUsedLocaleDict;
    Tcl_Obj *prevUsedLocaleUnnorm;
    Tcl_Obj *prevUsedLocale;
    Tcl_Obj *prevUsedLocaleDict;

    /* Cache for last base (last-second fast convert if base/tz not changed) */
    struct {
	Tcl_Obj *timezoneObj;
	TclDateFields date;
    } lastBase;

    /* Last-period cache for fast UTC to Local and backwards conversion */
    ClockLastTZOffs lastTZOffsCache[2];

    int defFlags;		    /* Default flags (from configure), ATM
				     * only CLF_VALIDATE supported */
} ClockClientData;

#define ClockDefaultYearCentury 2000
#define ClockDefaultCenturySwitch 38

/*
 * Clock scan and format facilities.
 */

#ifndef TCL_MEM_DEBUG
# define CLOCK_FMT_SCN_STORAGE_GC_SIZE 32
#else
# define CLOCK_FMT_SCN_STORAGE_GC_SIZE 0
#endif

#define CLOCK_MIN_TOK_CHAIN_BLOCK_SIZE 2

typedef struct ClockScanToken ClockScanToken;


typedef int ClockScanTokenProc(
	ClockFmtScnCmdArgs *opts,
	DateInfo *info,
	ClockScanToken *tok);


typedef enum _CLCKTOK_TYPE {
   CTOKT_INT = 1, CTOKT_WIDE, CTOKT_PARSER, CTOKT_SPACE, CTOKT_WORD, CTOKT_CHAR,
   CFMTT_PROC
} CLCKTOK_TYPE;

typedef struct ClockScanTokenMap {
    unsigned short int	type;
    unsigned short int	flags;
    unsigned short int	clearFlags;
    unsigned short int	minSize;
    unsigned short int	maxSize;
    unsigned short int	offs;
    ClockScanTokenProc *parser;
    const void	       *data;
} ClockScanTokenMap;

struct ClockScanToken {
    ClockScanTokenMap  *map;
    struct {
	const char *start;
	const char *end;
    } tokWord;
    unsigned short int	endDistance;
    unsigned short int	lookAhMin;
    unsigned short int	lookAhMax;
    unsigned short int	lookAhTok;
};


#define MIN_FMT_RESULT_BLOCK_ALLOC 80
#define MIN_FMT_RESULT_BLOCK_DELTA 0
/* Maximal permitted threshold (buffer size > result size) in percent,
 * to directly return the buffer without reallocate */
#define MAX_FMT_RESULT_THRESHOLD   2

typedef struct DateFormat {
    char *resMem;
    char *resEnd;
    char *output;

    TclDateFields date;

    Tcl_Obj *localeEra;
} DateFormat;

#define CLFMT_INCR	    (1 << 3)
#define CLFMT_DECR	    (1 << 4)
#define CLFMT_CALC	    (1 << 5)
#define CLFMT_LOCALE_INDX   (1 << 8)

typedef struct ClockFormatToken ClockFormatToken;

typedef int ClockFormatTokenProc(
	ClockFmtScnCmdArgs *opts,
	DateFormat *dateFmt,
	ClockFormatToken *tok,
	int *val);

typedef struct ClockFormatTokenMap {
    unsigned short int	type;
    const char	       *tostr;
    unsigned short int	width;
    unsigned short int	flags;
    unsigned short int	divider;
    unsigned short int	divmod;
    unsigned short int	offs;
    ClockFormatTokenProc *fmtproc;
    void	       *data;
} ClockFormatTokenMap;

struct ClockFormatToken {
    ClockFormatTokenMap *map;
    struct {
	const char *start;
	const char *end;
    } tokWord;
};


typedef struct ClockFmtScnStorage ClockFmtScnStorage;

struct ClockFmtScnStorage {
    int			 objRefCount;	/* Reference count shared across threads */
    ClockScanToken	*scnTok;
    unsigned int	 scnTokC;
    unsigned int	 scnSpaceCount; /* Count of mandatory spaces used in format */
    ClockFormatToken	*fmtTok;
    unsigned int	 fmtTokC;
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
    ClockFmtScnStorage	*nextPtr;
    ClockFmtScnStorage	*prevPtr;
#endif
    size_t		 fmtMinAlloc;
#if 0
   +Tcl_HashEntry    hashEntry		/* ClockFmtScnStorage is a derivate of Tcl_HashEntry,
					 * stored by offset +sizeof(self) */
#endif
};

/*
 * Clock macros.
 */

/*
 * Extracts Julian day and seconds of the day from posix seconds (tm).
 */
#define ClockExtractJDAndSODFromSeconds(jd, sod, tm) \
    do { \
	jd = (tm + JULIAN_SEC_POSIX_EPOCH); \
	if (jd >= SECONDS_PER_DAY || jd <= -SECONDS_PER_DAY) { \
	    jd /= SECONDS_PER_DAY; \
	    sod = (int)(tm % SECONDS_PER_DAY); \
	} else { \
	    sod = (int)jd, jd = 0; \
	} \
	if (sod < 0) { \
	    sod += SECONDS_PER_DAY; \
	    /* JD is affected, if switched into negative (avoid 24 hours difference) */ \
	    if (jd <= 0) { \
		jd--; \
	    } \
	} \
    } while(0)

/*
 * Prototypes of module functions.
 */

MODULE_SCOPE int    ToSeconds(int Hours, int Minutes,
			    int Seconds, MERIDIAN Meridian);
MODULE_SCOPE int    IsGregorianLeapYear(TclDateFields *);
MODULE_SCOPE void
		    GetJulianDayFromEraYearWeekDay(
			    TclDateFields *fields, int changeover);
MODULE_SCOPE void
		    GetJulianDayFromEraYearMonthDay(
			    TclDateFields *fields, int changeover);
MODULE_SCOPE void
		    GetJulianDayFromEraYearDay(
			    TclDateFields *fields, int changeover);
MODULE_SCOPE int    ConvertUTCToLocal(void *clientData, Tcl_Interp *,
			    TclDateFields *, Tcl_Obj *timezoneObj, int);
MODULE_SCOPE Tcl_Obj *
		    LookupLastTransition(Tcl_Interp *, Tcl_WideInt,
			    Tcl_Size, Tcl_Obj *const *, Tcl_WideInt *rangesVal);

MODULE_SCOPE int    TclClockFreeScan(Tcl_Interp *interp, DateInfo *info);

/* tclClock.c module declarations */

MODULE_SCOPE Tcl_Obj *
		    ClockSetupTimeZone(void *clientData,
		Tcl_Interp *interp, Tcl_Obj *timezoneObj);

MODULE_SCOPE Tcl_Obj *
		    ClockMCDict(ClockFmtScnCmdArgs *opts);
MODULE_SCOPE Tcl_Obj *
		    ClockMCGet(ClockFmtScnCmdArgs *opts, int mcKey);
MODULE_SCOPE Tcl_Obj *
		    ClockMCGetIdx(ClockFmtScnCmdArgs *opts, int mcKey);
MODULE_SCOPE int    ClockMCSetIdx(ClockFmtScnCmdArgs *opts, int mcKey,
			Tcl_Obj *valObj);

/* tclClockFmt.c module declarations */


MODULE_SCOPE char *
	TclItoAw(char *buf, int val, char padchar, unsigned short int width);
MODULE_SCOPE int
	TclAtoWIe(Tcl_WideInt *out, const char *p, const char *e, int sign);

MODULE_SCOPE Tcl_Obj*
		    ClockFrmObjGetLocFmtKey(Tcl_Interp *interp,
			Tcl_Obj *objPtr);

MODULE_SCOPE ClockFmtScnStorage *
		    Tcl_GetClockFrmScnFromObj(Tcl_Interp *interp,
			Tcl_Obj *objPtr);
MODULE_SCOPE Tcl_Obj *
		    ClockLocalizeFormat(ClockFmtScnCmdArgs *opts);

MODULE_SCOPE int    ClockScan(DateInfo *info,
			Tcl_Obj *strObj, ClockFmtScnCmdArgs *opts);

MODULE_SCOPE int    ClockFormat(DateFormat *dateFmt,
			ClockFmtScnCmdArgs *opts);

MODULE_SCOPE void   ClockFrmScnClearCaches(void);

#endif /* _TCLCLOCK_H */

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	Tcl_WrongNumArgs(interp, 1, objv, "dictionary");
	return TCL_ERROR;
    }
    result = Tcl_DictObjSize(interp, objv[1], &size);
    if (result == TCL_OK) {
	Tcl_SetObjResult(interp, Tcl_NewWideIntObj(size));
    }
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * TclDictObjSmartRef --
 *
 *	This function returns new tcl-object with the smart reference to
 *	dictionary object.
 *
 *	Object returned with this function is a smart reference (pointer),
 *	so new object of type tclDictType, that directly references given
 *	dictionary object (with internally increased refCount).
 *
 *	The usage of such pointer objects allows to hold more as one
 *	reference to the same real dictionary object, allows to make a pointer
 *	to part of another dictionary, allows to change the dictionary without
 *	regarding of the "shared" state of the dictionary object.
 *
 *	Prevents "called with shared object" exception if object is multiple
 *	referenced.
 *
 * Results:
 *	The newly create object (contains smart reference) is returned.
 *	The returned object has a ref count of 0.
 *
 * Side effects:
 *	Increases ref count of the referenced dictionary.
 *
 *----------------------------------------------------------------------
 */

Tcl_Obj *
TclDictObjSmartRef(
    Tcl_Interp *interp,
    Tcl_Obj    *dictPtr)
{
    Tcl_Obj *result;
    Dict    *dict;

    if (dictPtr->typePtr != &tclDictType
	    && SetDictFromAny(interp, dictPtr) != TCL_OK) {
	return NULL;
    }

    DictGetInternalRep(dictPtr, dict);

    result = Tcl_NewObj();
    DictSetInternalRep(result, dict);
    dict->refCount++;
    result->internalRep.twoPtrValue.ptr2 = NULL;
    result->typePtr = &tclDictType;

    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * DictExistsCmd --

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/*
 * tclGetDate.y --
 *
 *	Contains yacc grammar for parsing date and time strings. The output of
 *	this file should be the file tclDate.c which is used directly in the
 *	Tcl sources. Note that this file is largely obsolete in Tcl 8.5; it is
 *	only used when doing free-form date parsing, an ill-defined process
 *	anyway.
 *
 * Copyright (c) 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 * Copyright © 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright © 1995-1997 Sun Microsystems, Inc.
 * Copyright © 2015 Sergey G. Brester aka sebres.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

%parse-param {DateInfo* info}
%lex-param {DateInfo* info}
%define api.pure
 /* %error-verbose would be nice, but our token names are meaningless */
%locations

%{
/*
 * tclDate.c --
 *
 *	This file is generated from a yacc grammar defined in the file
 *	tclGetDate.y. It should not be edited directly.
 *
 * Copyright (c) 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 * Copyright © 1992-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright © 1995-1997 Sun Microsystems, Inc.
 * Copyright © 2015 Sergey G. Brester aka sebres.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 */
#include "tclInt.h"

/*
 * Bison generates several labels that happen to be unused. MS Visual C++
 * doesn't like that, and complains. Tell it to shut up.
 */

#ifdef _MSC_VER
#pragma warning( disable : 4102 )
#endif /* _MSC_VER */

/*
 * Meridian: am, pm, or 24-hour style.
 */

typedef enum _MERIDIAN {
#if 0
#define YYDEBUG 1
    MERam, MERpm, MER24
} MERIDIAN;
#endif

/*
 * yyparse will accept a 'struct DateInfo' as its parameter; that's where the
 * parsed fields will be returned.
 */

typedef struct DateInfo {

#include "tclDate.h"
    Tcl_Obj* messages;		/* Error messages */
    const char* separatrix;	/* String separating messages */

    time_t dateYear;
    time_t dateMonth;
    time_t dateDay;
    int dateHaveDate;

    time_t dateHour;
    time_t dateMinutes;
    time_t dateSeconds;
    MERIDIAN dateMeridian;
    int dateHaveTime;

    time_t dateTimezone;
    int dateDSTmode;
    int dateHaveZone;

    time_t dateRelMonth;
    time_t dateRelDay;
    time_t dateRelSeconds;
    int dateHaveRel;

    time_t dateMonthOrdinal;
    int dateHaveOrdinalMonth;

    time_t dateDayOrdinal;
    time_t dateDayNumber;
    int dateHaveDay;

    const char *dateStart;
    const char *dateInput;
    time_t *dateRelPointer;

    int dateDigitCount;
} DateInfo;

#define YYMALLOC	Tcl_Alloc
#define YYFREE(x)	(Tcl_Free((void*) (x)))

#define yyDSTmode	(info->dateDSTmode)
#define yyDayOrdinal	(info->dateDayOrdinal)
#define yyDayNumber	(info->dateDayNumber)
#define yyMonthOrdinal	(info->dateMonthOrdinal)
#define yyHaveDate	(info->dateHaveDate)
#define yyHaveDay	(info->dateHaveDay)
#define yyHaveOrdinalMonth (info->dateHaveOrdinalMonth)
#define yyHaveRel	(info->dateHaveRel)
#define yyHaveTime	(info->dateHaveTime)
#define yyHaveZone	(info->dateHaveZone)
#define yyTimezone	(info->dateTimezone)
#define yyDay		(info->dateDay)
#define yyMonth		(info->dateMonth)
#define yyYear		(info->dateYear)
#define yyHour		(info->dateHour)
#define yyMinutes	(info->dateMinutes)
#define yySeconds	(info->dateSeconds)
#define yyMeridian	(info->dateMeridian)
#define yyRelMonth	(info->dateRelMonth)
#define yyRelDay	(info->dateRelDay)
#define yyRelSeconds	(info->dateRelSeconds)
#define yyRelPointer	(info->dateRelPointer)
#define yyInput		(info->dateInput)
#define yyDigitCount	(info->dateDigitCount)

#define EPOCH		1970
#define START_OF_TIME	1902
#define END_OF_TIME	2037

/*
 * The offset of tm_year of struct tm returned by localtime, gmtime, etc.
 * Posix requires 1900.
 */

#define TM_YEAR_BASE	1900

#define HOUR(x)		((int) (60 * (x)))
#define HOUR(x)		((60 * (int)(x)))
#define SECSPERDAY	(24L * 60L * 60L)
#define IsLeapYear(x)	(((x) % 4 == 0) && ((x) % 100 != 0 || (x) % 400 == 0))

#define yyIncrFlags(f)				\
    do {					\
	info->errFlags |= (info->flags & (f));	\
	if (info->errFlags) { YYABORT; }	\
	info->flags |= (f);			\
    } while (0);

/*
 * An entry in the lexical lookup table.
 */

typedef struct _TABLE {
typedef struct {
    const char *name;
    int type;
    time_t value;
    int value;
} TABLE;

/*
 * Daylight-savings mode: on, off, or not yet known.
 */

typedef enum _DSTMODE {
    DSTon, DSToff, DSTmaybe
} DSTMODE;

%}

%union {
    time_t Number;
    Tcl_WideInt Number;
    enum _MERIDIAN Meridian;
}

%{

/*
 * Prototypes of internal functions.
 */

static int		LookupWord(YYSTYPE* yylvalPtr, char *buff);
 static void		TclDateerror(YYLTYPE* location,
static void		TclDateerror(YYLTYPE* location,
				     DateInfo* info, const char *s);
 static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
static int		TclDatelex(YYSTYPE* yylvalPtr, YYLTYPE* location,
				   DateInfo* info);
static time_t		ToSeconds(time_t Hours, time_t Minutes,
			    time_t Seconds, MERIDIAN Meridian);
MODULE_SCOPE int	yyparse(DateInfo*);

%}

%token	tAGO
%token	tDAY
%token	tDAYZONE
%token	tID
%token	tMERIDIAN
%token	tMONTH
%token	tMONTH_UNIT
%token	tSTARDATE
%token	tSEC_UNIT
%token	tSNUMBER
%token	tUNUMBER
%token	tZONE
%token	tUNUMBER
%token	tZONE
%token	tZONEwO4
%token	tZONEwO2
%token	tEPOCH
%token	tDST
%token	tISOBASE
%token	tISOBAS8
%token	tISOBAS6
%token	tISOBASL
%token	tDAY_UNIT
%token	tNEXT
%token	SP

%type	<Number>	tDAY
%type	<Number>	tDAYZONE
%type	<Number>	tMONTH
%type	<Number>	tMONTH_UNIT
%type	<Number>	tDST
%type	<Number>	tSEC_UNIT
%type	<Number>	tSNUMBER
%type	<Number>	tUNUMBER
%type	<Number>	tUNUMBER
%type	<Number>	INTNUM
%type	<Number>	tZONE
%type	<Number>	tZONEwO4
%type	<Number>	tZONEwO2
%type	<Number>	tISOBASE
%type	<Number>	tISOBAS8
%type	<Number>	tISOBAS6
%type	<Number>	tISOBASL
%type	<Number>	tDAY_UNIT
%type	<Number>	unit
%type	<Number>	sign
%type	<Number>	tNEXT
%type	<Number>	tSTARDATE
%type	<Meridian>	tMERIDIAN
%type	<Meridian>	o_merid

%%

spec	: /* NULL */
	| spec item
	/* | spec SP item */
	;

item	: time {
	    yyHaveTime++;
	    yyIncrFlags(CLF_TIME);
	}
	| zone {
	    yyHaveZone++;
	    yyIncrFlags(CLF_ZONE);
	}
	| date {
	    yyHaveDate++;
	    yyIncrFlags(CLF_HAVEDATE);
	}
	| ordMonth {
	    yyHaveOrdinalMonth++;
	    yyIncrFlags(CLF_ORDINALMONTH);
	}
	| day {
	    yyHaveDay++;
	    yyIncrFlags(CLF_DAYOFWEEK);
	}
	| relspec {
	    yyHaveRel++;
	    info->flags |= CLF_RELCONV;
	}
	| iso {
	    yyHaveTime++;
	    yyIncrFlags(CLF_TIME|CLF_HAVEDATE);
	    yyHaveDate++;
	}
	| trek {
	    yyIncrFlags(CLF_TIME|CLF_HAVEDATE);
	    yyHaveTime++;
	    info->flags |= CLF_RELCONV;
	    yyHaveDate++;
	    yyHaveRel++;
	}
	| number
	| numitem
	;

iextime : tUNUMBER ':' tUNUMBER ':' tUNUMBER {
	    yyHour = $1;
	    yyMinutes = $3;
	    yySeconds = $5;
	}
	| tUNUMBER ':' tUNUMBER {
	    yyHour = $1;
	    yyMinutes = $3;
	    yySeconds = 0;
	}
	;
time	: tUNUMBER tMERIDIAN {
	    yyHour = $1;
	    yyMinutes = 0;
	    yySeconds = 0;
	    yyMeridian = $2;
	}
	| tUNUMBER ':' tUNUMBER o_merid {
	| iextime o_merid {
	    yyHour = $1;
	    yyMinutes = $3;
	    yySeconds = 0;
	    yyMeridian = $4;
	    yyMeridian = $2;
	}
	| tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
	    yyHour = $1;
	    yyMinutes = $3;
	    yySeconds = $5;
	    yyMeridian = $6;
	}
	;

zone	: tZONE tDST {
	    yyTimezone = $1;
	    if (yyTimezone > HOUR( 12)) yyTimezone -= HOUR(100);
	    yyDSTmode = DSTon;
	}
	| tZONE {
	    yyTimezone = $1;
	    if (yyTimezone > HOUR( 12)) yyTimezone -= HOUR(100);
	    yyDSTmode = DSToff;
	}
	| tDAYZONE {
	    yyTimezone = $1;
	    yyDSTmode = DSTon;
	}
	| tZONEwO4 sign INTNUM { /* GMT+0100, GMT-1000, etc. */
	    yyTimezone = $1 - $2*($3 % 100 + ($3 / 100) * 60);
	    yyDSTmode = DSToff;
	}
	| tZONEwO2 sign INTNUM { /* GMT+1, GMT-10, etc. */
	    yyTimezone = $1 - $2*($3 * 60);
	    yyDSTmode = DSToff;
	}
	| sign tUNUMBER {
	| sign INTNUM { /* +0100, -0100 */
	    yyTimezone = -$1*($2 % 100 + ($2 / 100) * 60);
	    yyDSTmode = DSToff;
	}
	;

comma	: ','
	| ',' SP
	;

day	: tDAY {
	    yyDayOrdinal = 1;
	    yyDayNumber = $1;
	    yyDayOfWeek = $1;
	}
	| tDAY ',' {
	| tDAY comma {
	    yyDayOrdinal = 1;
	    yyDayNumber = $1;
	    yyDayOfWeek = $1;
	}
	| tUNUMBER tDAY {
	    yyDayOrdinal = $1;
	    yyDayNumber = $2;
	    yyDayOfWeek = $2;
	}
	| sign SP tUNUMBER tDAY {
	    yyDayOrdinal = $1 * $3;
	    yyDayOfWeek = $4;
	}
	| sign tUNUMBER tDAY {
	    yyDayOrdinal = $1 * $2;
	    yyDayNumber = $3;
	    yyDayOfWeek = $3;
	}
	| tNEXT tDAY {
	    yyDayOrdinal = 2;
	    yyDayNumber = $2;
	    yyDayOfWeek = $2;
	}
	;

iexdate	: tUNUMBER '-' tUNUMBER '-' tUNUMBER {
	    yyMonth = $3;
	    yyDay = $5;
	    yyYear = $1;
	}
	;
date	: tUNUMBER '/' tUNUMBER {
	    yyMonth = $1;
	    yyDay = $3;
	}
	| tUNUMBER '/' tUNUMBER '/' tUNUMBER {
	    yyMonth = $1;
	    yyDay = $3;
	    yyYear = $5;
	}
	| tISOBASE {
	| isodate
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	}
	| tUNUMBER '-' tMONTH '-' tUNUMBER {
	    yyDay = $1;
	    yyMonth = $3;
	    yyYear = $5;
	}
	| tUNUMBER '-' tUNUMBER '-' tUNUMBER {
	    yyMonth = $3;
	    yyDay = $5;
	    yyYear = $1;
	}
	| tMONTH tUNUMBER {
	    yyMonth = $1;
	    yyDay = $2;
	}
	| tMONTH tUNUMBER ',' tUNUMBER {
	| tMONTH tUNUMBER comma tUNUMBER {
	    yyMonth = $1;
	    yyDay = $2;
	    yyYear = $4;
	}
	| tUNUMBER tMONTH {
	    yyMonth = $2;
	    yyDay = $1;
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	    yyMonth = $2;
	    yyDay = $1;
	    yyYear = $3;
	}
	;

ordMonth: tNEXT tMONTH {
	    yyMonthOrdinal = 1;
	    yyMonth = $2;
	    yyMonthOrdinalIncr = 1;
	    yyMonthOrdinal = $2;
	}
	| tNEXT tUNUMBER tMONTH {
	    yyMonthOrdinal = $2;
	    yyMonth = $3;
	    yyMonthOrdinalIncr = $2;
	    yyMonthOrdinal = $3;
	}
	;

iso	: tUNUMBER '-' tUNUMBER '-' tUNUMBER tZONE
isosep	: 'T'|SP
		tUNUMBER ':' tUNUMBER ':' tUNUMBER {
	    if ($6 != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = $1;
	    yyMonth = $3;
	    yyDay = $5;
	;
isodate	: tISOBAS8 { /* YYYYMMDD */
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	    yyHour = $7;
	    yyMinutes = $9;
	    yySeconds = $11;
	}
	| tISOBASE tZONE tISOBASE {
	| tISOBAS6 { /* YYMMDD */
	    if ($2 != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	    yyHour = $3 / 10000;
	    yyMinutes = ($3 % 10000)/100;
	    yySeconds = $3 % 100;
	}
	| iexdate
	;
	| tISOBASE tZONE tUNUMBER ':' tUNUMBER ':' tUNUMBER {
isotime	: tISOBAS6 {
	    if ($2 != HOUR( 7) + HOUR(100)) YYABORT;
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	    yyHour = $3;
	    yyMinutes = $5;
	    yySeconds = $7;
	    yyHour = $1 / 10000;
	    yyMinutes = ($1 % 10000)/100;
	    yySeconds = $1 % 100;
	}
	| iextime
	;
iso	: isodate isosep isotime
	| tISOBASE tISOBASE {
	| tISOBASL tISOBAS6 { /* YYYYMMDDhhmmss */
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	    yyHour = $2 / 10000;
	    yyMinutes = ($2 % 10000)/100;
	    yySeconds = $2 % 100;
	}
	| tISOBASL tUNUMBER { /* YYYYMMDDhhmm */
	    if (yyDigitCount != 4) YYABORT; /* normally unreached */
	    yyYear = $1 / 10000;
	    yyMonth = ($1 % 10000)/100;
	    yyDay = $1 % 100;
	    yyHour = $2 / 100;
	    yyMinutes = ($2 % 100);
	    yySeconds = 0;
	}
	;

trek	: tSTARDATE tUNUMBER '.' tUNUMBER {
trek	: tSTARDATE INTNUM '.' tUNUMBER {
	    /*
	     * Offset computed year by -377 so that the returned years will be
	     * in a range accessible with a 32 bit clock seconds value.
	     */

	    yyYear = $2/1000 + 2323 - 377;
	    yyDay  = 1;
	    yyMonth = 1;
	    yyRelDay += (($2%1000)*(365 + IsLeapYear(yyYear)))/1000;
	    yyRelSeconds += $4 * 144 * 60;
	    yyRelSeconds += $4 * (144LL * 60LL);
	}
	;

relspec : relunits tAGO {
	    yyRelSeconds *= -1;
	    yyRelMonth *= -1;
	    yyRelDay *= -1;
	}
	| relunits
	;

relunits : sign tUNUMBER unit {
relunits : sign SP INTNUM unit {
	    *yyRelPointer += $1 * $3 * $4;
	}
	| sign INTNUM unit {
	    *yyRelPointer += $1 * $2 * $3;
	}
	| tUNUMBER unit {
	| INTNUM unit {
	    *yyRelPointer += $1 * $2;
	}
	| tNEXT unit {
	    *yyRelPointer += $2;
	}
	| tNEXT tUNUMBER unit {
	| tNEXT INTNUM unit {
	    *yyRelPointer += $2 * $3;
	}
	| unit {
	    *yyRelPointer += $1;
	}
	;

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	}
	| tMONTH_UNIT {
	    $$ = $1;
	    yyRelPointer = &yyRelMonth;
	}
	;

number	: tUNUMBER {
	    if (yyHaveTime && yyHaveDate && !yyHaveRel) {
INTNUM	: tUNUMBER {
	    $$ = $1;
	}
	| tISOBAS6 {
	    $$ = $1;
	}
	| tISOBAS8 {
	    $$ = $1;
	}
	;

numitem	: tUNUMBER {
	    if ((info->flags & (CLF_TIME|CLF_HAVEDATE|CLF_RELCONV)) == (CLF_TIME|CLF_HAVEDATE)) {
		yyYear = $1;
	    } else {
		yyHaveTime++;
		yyIncrFlags(CLF_TIME);
		if (yyDigitCount <= 2) {
		    yyHour = $1;
		    yyMinutes = 0;
		} else {
		    yyHour = $1 / 100;
		    yyMinutes = $1 % 100;
		}
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    { "tomorrow",	tDAY_UNIT,	1 },
    { "yesterday",	tDAY_UNIT,	-1 },
    { "today",		tDAY_UNIT,	0 },
    { "now",		tSEC_UNIT,	0 },
    { "last",		tUNUMBER,	-1 },
    { "this",		tSEC_UNIT,	0 },
    { "next",		tNEXT,		1 },
#if 0
    { "first",		tUNUMBER,	1 },
    { "second",		tUNUMBER,	2 },
    { "third",		tUNUMBER,	3 },
    { "fourth",		tUNUMBER,	4 },
    { "fifth",		tUNUMBER,	5 },
    { "sixth",		tUNUMBER,	6 },
    { "seventh",	tUNUMBER,	7 },
    { "eighth",		tUNUMBER,	8 },
    { "ninth",		tUNUMBER,	9 },
    { "tenth",		tUNUMBER,	10 },
    { "eleventh",	tUNUMBER,	11 },
    { "twelfth",	tUNUMBER,	12 },
#endif
    { "ago",		tAGO,		1 },
    { "epoch",		tEPOCH,		0 },
    { "stardate",	tSTARDATE,	0 },
    { NULL, 0, 0 }
};

/*
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677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703

























704
705










706
707
708
709
710
711
712
713
714
715
716
717



718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734

735
736
737
738



739
740
741
742
743
744
745
746
747
748
749

750
751
752
753
754

755
756
757
758
759

760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780

781
782
783
784

785
786
787
788
789
790
791
635
636
637
638
639
640
641

























642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709

710
711



712
713
714
715
716
717
718
719
720
721
722
723
724

725
726
727
728
729

730
731
732
733
734

735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755

756
757
758
759

760
761
762
763
764
765
766
767







-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+


+
+
+
+
+
+
+
+
+
+












+
+
+
















-
+

-
-
-
+
+
+










-
+




-
+




-
+




















-
+



-
+







};

/*
 * Military timezone table.
 */

static const TABLE MilitaryTable[] = {
    { "a",	tZONE,	-HOUR( 1) + HOUR(100) },
    { "b",	tZONE,	-HOUR( 2) + HOUR(100) },
    { "c",	tZONE,	-HOUR( 3) + HOUR(100) },
    { "d",	tZONE,	-HOUR( 4) + HOUR(100) },
    { "e",	tZONE,	-HOUR( 5) + HOUR(100) },
    { "f",	tZONE,	-HOUR( 6) + HOUR(100) },
    { "g",	tZONE,	-HOUR( 7) + HOUR(100) },
    { "h",	tZONE,	-HOUR( 8) + HOUR(100) },
    { "i",	tZONE,	-HOUR( 9) + HOUR(100) },
    { "k",	tZONE,	-HOUR(10) + HOUR(100) },
    { "l",	tZONE,	-HOUR(11) + HOUR(100) },
    { "m",	tZONE,	-HOUR(12) + HOUR(100) },
    { "n",	tZONE,	HOUR(  1) + HOUR(100) },
    { "o",	tZONE,	HOUR(  2) + HOUR(100) },
    { "p",	tZONE,	HOUR(  3) + HOUR(100) },
    { "q",	tZONE,	HOUR(  4) + HOUR(100) },
    { "r",	tZONE,	HOUR(  5) + HOUR(100) },
    { "s",	tZONE,	HOUR(  6) + HOUR(100) },
    { "t",	tZONE,	HOUR(  7) + HOUR(100) },
    { "u",	tZONE,	HOUR(  8) + HOUR(100) },
    { "v",	tZONE,	HOUR(  9) + HOUR(100) },
    { "w",	tZONE,	HOUR( 10) + HOUR(100) },
    { "x",	tZONE,	HOUR( 11) + HOUR(100) },
    { "y",	tZONE,	HOUR( 12) + HOUR(100) },
    { "z",	tZONE,	HOUR( 0)  + HOUR(100) },
    { "a",	tZONE,	-HOUR( 1) },
    { "b",	tZONE,	-HOUR( 2) },
    { "c",	tZONE,	-HOUR( 3) },
    { "d",	tZONE,	-HOUR( 4) },
    { "e",	tZONE,	-HOUR( 5) },
    { "f",	tZONE,	-HOUR( 6) },
    { "g",	tZONE,	-HOUR( 7) },
    { "h",	tZONE,	-HOUR( 8) },
    { "i",	tZONE,	-HOUR( 9) },
    { "k",	tZONE,	-HOUR(10) },
    { "l",	tZONE,	-HOUR(11) },
    { "m",	tZONE,	-HOUR(12) },
    { "n",	tZONE,	HOUR(  1) },
    { "o",	tZONE,	HOUR(  2) },
    { "p",	tZONE,	HOUR(  3) },
    { "q",	tZONE,	HOUR(  4) },
    { "r",	tZONE,	HOUR(  5) },
    { "s",	tZONE,	HOUR(  6) },
    { "t",	tZONE,	HOUR(  7) },
    { "u",	tZONE,	HOUR(  8) },
    { "v",	tZONE,	HOUR(  9) },
    { "w",	tZONE,	HOUR( 10) },
    { "x",	tZONE,	HOUR( 11) },
    { "y",	tZONE,	HOUR( 12) },
    { "z",	tZONE,	HOUR( 0) },
    { NULL, 0, 0 }
};

static inline const char *
bypassSpaces(
    const char *s)
{
    while (TclIsSpaceProc(*s)) {
	s++;
    }
    return s;
}

/*
 * Dump error messages in the bit bucket.
 */

static void
TclDateerror(
    YYLTYPE* location,
    DateInfo* infoPtr,
    const char *s)
{
    Tcl_Obj* t;
    if (!infoPtr->messages) {
	TclNewObj(infoPtr->messages);
    }
    Tcl_AppendToObj(infoPtr->messages, infoPtr->separatrix, -1);
    Tcl_AppendToObj(infoPtr->messages, s, -1);
    Tcl_AppendToObj(infoPtr->messages, " (characters ", -1);
    TclNewIntObj(t, location->first_column);
    Tcl_IncrRefCount(t);
    Tcl_AppendObjToObj(infoPtr->messages, t);
    Tcl_DecrRefCount(t);
    Tcl_AppendToObj(infoPtr->messages, "-", -1);
    TclNewIntObj(t, location->last_column);
    Tcl_IncrRefCount(t);
    Tcl_AppendObjToObj(infoPtr->messages, t);
    Tcl_DecrRefCount(t);
    Tcl_AppendToObj(infoPtr->messages, ")", -1);
    infoPtr->separatrix = "\n";
}

static time_t
int
ToSeconds(
    time_t Hours,
    time_t Minutes,
    time_t Seconds,
    int Hours,
    int Minutes,
    int Seconds,
    MERIDIAN Meridian)
{
    if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) {
	return -1;
    }
    switch (Meridian) {
    case MER24:
	if (Hours < 0 || Hours > 23) {
	    return -1;
	}
	return (Hours * 60L + Minutes) * 60L + Seconds;
	return (Hours * 60 + Minutes) * 60 + Seconds;
    case MERam:
	if (Hours < 1 || Hours > 12) {
	    return -1;
	}
	return ((Hours % 12) * 60L + Minutes) * 60L + Seconds;
	return ((Hours % 12) * 60 + Minutes) * 60 + Seconds;
    case MERpm:
	if (Hours < 1 || Hours > 12) {
	    return -1;
	}
	return (((Hours % 12) + 12) * 60L + Minutes) * 60L + Seconds;
	return (((Hours % 12) + 12) * 60 + Minutes) * 60 + Seconds;
    }
    return -1;			/* Should never be reached */
}

static int
LookupWord(
    YYSTYPE* yylvalPtr,
    char *buff)
{
    char *p;
    char *q;
    const TABLE *tp;
    int i, abbrev;

    /*
     * Make it lowercase.
     */

    Tcl_UtfToLower(buff);

    if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) {
    if (*buff == 'a' && (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0)) {
	yylvalPtr->Meridian = MERam;
	return tMERIDIAN;
    }
    if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) {
    if (*buff == 'p' && (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0)) {
	yylvalPtr->Meridian = MERpm;
	return tMERIDIAN;
    }

    /*
     * See if we have an abbreviation for a month.
     */
891
892
893
894
895
896
897

898
899
900
901
902
903
904











905

906
907

908
909
910
911
912
913












914
915
916
917
918














919
920
921
922
923
924
925




926
927
928
929
930









931

932
933
934

935
936
937
938
939
940
941































942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961

962
963

964
965
966

967
968
969
970
971
972
973
974
975
976
977
978
979
980
981







982
983
984


985
986
987
988
989
990
991

992
993
994
995
996

997
998
999

1000
1001

1002
1003

1004

1005
1006
1007
1008
1009
1010
1011


1012
















1013
1014
1015
1016






1017
1018
1019
1020
1021

1022
1023
1024
1025
1026
1027
1028
1029

1030

1031
1032


1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123

1124
1125
1126
1127
1128
1129
1130
1131
1132
867
868
869
870
871
872
873
874
875
876
877




878
879
880
881
882
883
884
885
886
887
888
889
890
891

892
893





894
895
896
897
898
899
900
901
902
903
904
905





906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922




923
924
925
926





927
928
929
930
931
932
933
934
935
936
937
938
939

940
941
942
943
944
945
946

947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996

997
998

999

1000

1001

1002




1003
1004







1005
1006
1007
1008
1009
1010
1011



1012
1013







1014


1015


1016
1017


1018
1019

1020

1021
1022

1023

1024





1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043




1044
1045
1046
1047
1048
1049
1050
1051

1052

1053
1054
1055
1056
1057
1058

1059

1060
1061
1062


1063
1064



























































































1065
1066
1067
1068
1069
1070
1071
1072
1073
1074







+



-
-
-
-
+
+
+
+
+
+
+
+
+
+
+

+

-
+

-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+



-
-
-
-
+
+
+
+
-
-
-
-
-
+
+
+
+
+
+
+
+
+

+


-
+






-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+



















-
+

-
+
-

-
+
-

-
-
-
-


-
-
-
-
-
-
-
+
+
+
+
+
+
+
-
-
-
+
+
-
-
-
-
-
-
-
+
-
-

-
-
+

-
-
+

-
+
-

+
-
+
-

-
-
-
-
-
+
+

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
-
-
+
+
+
+
+
+


-

-
+





-

-
+

+
-
-
+
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+









    YYLTYPE* location,
    DateInfo *info)
{
    char c;
    char *p;
    char buff[20];
    int Count;
    const char *tokStart;

    location->first_column = yyInput - info->dateStart;
    for ( ; ; ) {
	while (TclIsSpaceProcM(*yyInput)) {
	    yyInput++;
	}


	if (isspace(UCHAR(*yyInput))) {
	    yyInput = bypassSpaces(yyInput);
	    /* ignore space at end of text and before some words */
	    c = *yyInput;
	    if (c != '\0' && !isalpha(UCHAR(c))) {
		return SP;
	    }
	}
	tokStart = yyInput;

	if (isdigit(UCHAR(c = *yyInput))) { /* INTL: digit */

	    /*
	     * Convert the string into a number; count the number of digits.
	     * Count the number of digits.
	     */

	    Count = 0;
	    for (yylvalPtr->Number = 0;
		    isdigit(UCHAR(c = *yyInput++)); ) {	  /* INTL: digit */
		yylvalPtr->Number = 10 * yylvalPtr->Number + c - '0';
	    p = (char *)yyInput;
	    while (isdigit(UCHAR(*++p))) {};
	    yyDigitCount = p - yyInput;
	    /*
	     * A number with 12 or 14 digits is considered an ISO 8601 date.
	     */
	    if (yyDigitCount == 14 || yyDigitCount == 12) {
		/* long form of ISO 8601 (without separator), either
		 * YYYYMMDDhhmmss or YYYYMMDDhhmm, so reduce to date
		 * (8 chars is isodate) */
		p = (char *)yyInput+8;
		if (TclAtoWIe(&yylvalPtr->Number, yyInput, p, 1) != TCL_OK) {
		Count++;
	    }
	    yyInput--;
	    yyDigitCount = Count;

		    return tID; /* overflow*/
		}
		yyDigitCount = 8;
		yyInput = p;
		location->last_column = yyInput - info->dateStart - 1;
		return tISOBASL;
	    }
	    /*
	     * Convert the string into a number
	     */
	    if (TclAtoWIe(&yylvalPtr->Number, yyInput, p, 1) != TCL_OK) {
		return tID; /* overflow*/
	    }
	    yyInput = p;
	    /*
	     * A number with 6 or more digits is considered an ISO 8601 base.
	     */

	    if (Count >= 6) {
		location->last_column = yyInput - info->dateStart - 1;
		return tISOBASE;
	    location->last_column = yyInput - info->dateStart - 1;
	    if (yyDigitCount >= 6) {
		if (yyDigitCount == 8) {
		    return tISOBAS8;
	    } else {
		location->last_column = yyInput - info->dateStart - 1;
		return tUNUMBER;
	    }
	}
		}
		if (yyDigitCount == 6) {
		    return tISOBAS6;
		}
	    }
	    /* ignore spaces after digits (optional) */
	    yyInput = bypassSpaces(yyInput);
	    return tUNUMBER;
	}
	if (!(c & 0x80) && isalpha(UCHAR(c))) {		  /* INTL: ISO only. */
	    int ret;
	    for (p = buff; isalpha(UCHAR(c = *yyInput++)) /* INTL: ISO only. */
		     || c == '.'; ) {
		if (p < &buff[sizeof buff - 1]) {
		if (p < &buff[sizeof(buff) - 1]) {
		    *p++ = c;
		}
	    }
	    *p = '\0';
	    yyInput--;
	    location->last_column = yyInput - info->dateStart - 1;
	    return LookupWord(yylvalPtr, buff);
	    ret = LookupWord(yylvalPtr, buff);
	    /*
	     * lookahead:
	     *	for spaces to consider word boundaries (for instance
	     *	literal T in isodateTisotimeZ is not a TZ, but Z is UTC);
	     *	for +/- digit, to differentiate between "GMT+1000 day" and "GMT +1000 day";
	     * bypass spaces after token (but ignore by TZ+OFFS), because should
	     * recognize next SP token, if TZ only.
	     */
	    if (ret == tZONE || ret == tDAYZONE) {
		c = *yyInput;
		if (isdigit(UCHAR(c))) { /* literal not a TZ  */
		    yyInput = tokStart;
		    return *yyInput++;
		}
		if ((c == '+' || c == '-') && isdigit(UCHAR(*(yyInput+1)))) {
		    if ( !isdigit(UCHAR(*(yyInput+2)))
		      || !isdigit(UCHAR(*(yyInput+3)))) {
			/* GMT+1, GMT-10, etc. */
			return tZONEwO2;
		    }
		    if ( isdigit(UCHAR(*(yyInput+4)))
		      && !isdigit(UCHAR(*(yyInput+5)))) {
			/* GMT+1000, etc. */
			return tZONEwO4;
		    }
		}
	    }
	    yyInput = bypassSpaces(yyInput);
	    return ret;

	}
	if (c != '(') {
	    location->last_column = yyInput - info->dateStart;
	    return *yyInput++;
	}
	Count = 0;
	do {
	    c = *yyInput++;
	    if (c == '\0') {
		location->last_column = yyInput - info->dateStart - 1;
		return c;
	    } else if (c == '(') {
		Count++;
	    } else if (c == ')') {
		Count--;
	    }
	} while (Count > 0);
    }
}


int
TclClockOldscanObjCmd(
TclClockFreeScan(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Tcl interpreter */
    int objc,			/* Count of parameters */
    DateInfo *info)		/* Input and result parameters */
    Tcl_Obj *const *objv)	/* Parameters */
{
    Tcl_Obj *result, *resultElement;
    int yr, mo, da;
    DateInfo dateInfo;
    DateInfo* info = &dateInfo;
    int status;

    if (objc != 5) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"stringToParse baseYear baseMonth baseDay" );
	return TCL_ERROR;
    }

    yyInput = TclGetString(objv[1]);
  #if YYDEBUG
    /* enable debugging if compiled with YYDEBUG */
    yydebug = 1;
  #endif

    /*
     * yyInput = stringToParse;
    dateInfo.dateStart = yyInput;

    yyHaveDate = 0;
     *
     * ClockInitDateInfo(info) should be executed to pre-init info;
    if (Tcl_GetIntFromObj(interp, objv[2], &yr) != TCL_OK
	    || Tcl_GetIntFromObj(interp, objv[3], &mo) != TCL_OK
	    || Tcl_GetIntFromObj(interp, objv[4], &da) != TCL_OK) {
	return TCL_ERROR;
    }
    yyYear = yr; yyMonth = mo; yyDay = da;

     */
    yyHaveTime = 0;
    yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24;

    yyHaveZone = 0;
    yyTimezone = 0; yyDSTmode = DSTmaybe;
    yyDSTmode = DSTmaybe;

    yyHaveOrdinalMonth = 0;
    yyMonthOrdinal = 0;
    info->separatrix = "";

    yyHaveDay = 0;
    info->dateStart = yyInput;
    yyDayOrdinal = 0; yyDayNumber = 0;

    /* ignore spaces at begin */
    yyHaveRel = 0;
    yyInput = bypassSpaces(yyInput);
    yyRelMonth = 0; yyRelDay = 0; yyRelSeconds = 0; yyRelPointer = NULL;

    TclNewObj(dateInfo.messages);
    dateInfo.separatrix = "";
    Tcl_IncrRefCount(dateInfo.messages);

    status = yyparse(&dateInfo);
    /* parse */
    status = yyparse(info);
    if (status == 1) {
    	const char *msg = NULL;
	if (info->errFlags & CLF_HAVEDATE) {
	    msg = "more than one date in string";
	} else if (info->errFlags & CLF_TIME) {
	    msg = "more than one time of day in string";
	} else if (info->errFlags & CLF_ZONE) {
	    msg = "more than one time zone in string";
	} else if (info->errFlags & CLF_DAYOFWEEK) {
	    msg = "more than one weekday in string";
	} else if (info->errFlags & CLF_ORDINALMONTH) {
	    msg = "more than one ordinal month in string";
	}
	if (msg) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(msg, -1));
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	} else {
	Tcl_SetObjResult(interp, dateInfo.messages);
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", (char *)NULL);
	return TCL_ERROR;
	    Tcl_SetObjResult(interp,
		info->messages ? info->messages : Tcl_NewObj());
	    info->messages = NULL;
	    Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "PARSE", (char *)NULL);
	}
	status = TCL_ERROR;
    } else if (status == 2) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("memory exhausted", -1));
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "MEMORY", (char *)NULL);
	return TCL_ERROR;
	status = TCL_ERROR;
    } else if (status != 0) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj("Unknown status returned "
						  "from date parser. Please "
						  "report this error as a "
						  "bug in Tcl.", -1));
	Tcl_DecrRefCount(dateInfo.messages);
	Tcl_SetErrorCode(interp, "TCL", "BUG", (char *)NULL);
	return TCL_ERROR;
	status = TCL_ERROR;
    }
    if (info->messages) {
    Tcl_DecrRefCount(dateInfo.messages);

	Tcl_DecrRefCount(info->messages);
    }
    if (yyHaveDate > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one date in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveTime > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one time of day in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveZone > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one time zone in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveDay > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one weekday in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }
    if (yyHaveOrdinalMonth > 1) {
	Tcl_SetObjResult(interp,
		Tcl_NewStringObj("more than one ordinal month in string", -1));
	Tcl_SetErrorCode(interp, "TCL", "VALUE", "DATE", "MULTIPLE", (char *)NULL);
	return TCL_ERROR;
    }

    TclNewObj(result);
    TclNewObj(resultElement);
    if (yyHaveDate) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyYear));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonth));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDay));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    if (yyHaveTime) {
	Tcl_ListObjAppendElement(interp, result, Tcl_NewIntObj(
		ToSeconds(yyHour, yyMinutes, yySeconds, (MERIDIAN)yyMeridian)));
    } else {
	TclNewObj(resultElement);
	Tcl_ListObjAppendElement(interp, result, resultElement);
    }

    TclNewObj(resultElement);
    if (yyHaveZone) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(-yyTimezone));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(1 - yyDSTmode));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveRel) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelMonth));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelDay));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyRelSeconds));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveDay && !yyHaveDate) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDayOrdinal));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyDayNumber));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    TclNewObj(resultElement);
    if (yyHaveOrdinalMonth) {
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonthOrdinal));
	Tcl_ListObjAppendElement(interp, resultElement,
		Tcl_NewIntObj(yyMonth));
    }
    Tcl_ListObjAppendElement(interp, result, resultElement);

    Tcl_SetObjResult(interp, result);
    return TCL_OK;
    return status;
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

Changes to generic/tclInt.h.

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+







MODULE_SCOPE void	TclDeleteNamespaceVars(Namespace *nsPtr);
MODULE_SCOPE void	TclDeleteNamespaceChildren(Namespace *nsPtr);
MODULE_SCOPE Tcl_Size	TclDictGetSize(Tcl_Obj *dictPtr);
MODULE_SCOPE int	TclFindDictElement(Tcl_Interp *interp,
			    const char *dict, Tcl_Size dictLength,
			    const char **elementPtr, const char **nextPtr,
			    Tcl_Size *sizePtr, int *literalPtr);
MODULE_SCOPE Tcl_Obj *	TclDictObjSmartRef(Tcl_Interp *interp, Tcl_Obj *);
/* TIP #280 - Modified token based evaluation, with line information. */
MODULE_SCOPE int	TclEvalEx(Tcl_Interp *interp, const char *script,
			    Tcl_Size numBytes, int flags, Tcl_Size line,
			    Tcl_Size *clNextOuter, const char *outerScript);
MODULE_SCOPE Tcl_ObjCmdProc TclFileAttrsCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclFileCopyCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclFileDeleteCmd;

Added generic/tclStrIdxTree.c.

















































































































































































































































































































































































































































































































































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/*
 * tclStrIdxTree.c --
 *
 *	Contains the routines for managing string index tries in Tcl.
 *
 *	This code is back-ported from the tclSE engine, by Serg G. Brester.
 *
 * Copyright (c) 2016 by Sergey G. Brester aka sebres. All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * -----------------------------------------------------------------------
 *
 * String index tries are prepaired structures used for fast greedy search of the string
 * (index) by unique string prefix as key.
 *
 * Index tree build for two lists together can be explained in the following datagram
 *
 * Lists:
 *
 *	{Januar Februar Maerz April Mai Juni Juli August September Oktober November Dezember}
 *	{Jnr Fbr Mrz Apr Mai Jni Jli Agt Spt Okt Nvb Dzb}
 *
 * Index-Tree:
 *
 *	j		 0	 *	...
 *	 anuar		 1	 *
 *	 u		 0	 *	a		 0
 *	  ni		 6	 *	 pril		 4
 *	  li		 7	 *	 ugust		 8
 *	 n		 0	 *	 gt		 8
 *	  r		 1	 *	s		 9
 *	  i		 6	 *	 eptember	 9
 *	 li		 7	 *	 pt		 9
 *	f		 2	 *	oktober		10
 *	 ebruar		 2	 *	n		11
 *	 br		 2	 *	 ovember	11
 *	m		 0	 *	 vb		11
 *	 a		 0	 *	d		12
 *	  erz		 3	 *	 ezember	12
 *	  i		 5	 *	 zb		12
 *	 rz		 3	 *
 *	...
 *
 * Thereby value 0 shows pure group items (corresponding ambigous matches).
 * But the group may have a value if it contains only same values
 * (see for example group "f" above).
 *
 * StrIdxTree's are very fast, so:
 *    build of above-mentioned tree takes about 10 microseconds.
 *    search of string index in this tree takes fewer as 0.1 microseconds.
 *
 */

#include "tclInt.h"
#include "tclStrIdxTree.h"


/*
 *----------------------------------------------------------------------
 *
 * TclStrIdxTreeSearch --
 *
 *  Find largest part of string "start" in indexed tree (case sensitive).
 *
 *  Also used for building of string index tree.
 *
 * Results:
 *  Return position of UTF character in start after last equal character
 *  and found item (with parent).
 *
 * Side effects:
 *  None.
 *
 *----------------------------------------------------------------------
 */

const char*
TclStrIdxTreeSearch(
    TclStrIdxTree **foundParent, /* Return value of found sub tree (used for tree build) */
    TclStrIdx	  **foundItem,	 /* Return value of found item */
    TclStrIdxTree  *tree,	 /* Index tree will be browsed */
    const char	*start,		 /* UTF string to find in tree */
    const char	*end)		 /* End of string */
{
    TclStrIdxTree *parent = tree, *prevParent = tree;
    TclStrIdx  *item = tree->firstPtr, *prevItem = NULL;
    const char *s = start, *f, *cin, *cinf, *prevf = NULL;
    Tcl_Size offs = 0;

    if (item == NULL) {
	goto done;
    }

    /* search in tree */
    do {
	cinf = cin = TclGetString(item->key) + offs;
	f = TclUtfFindEqualNCInLwr(s, end, cin, cin + item->length - offs, &cinf);
	/* if something was found */
	if (f > s) {
	    /* if whole string was found */
	    if (f >= end) {
		start = f;
		goto done;
	    };
	    /* set new offset and shift start string */
	    offs += cinf - cin;
	    s = f;
	    /* if match item, go deeper as long as possible */
	    if (offs >= item->length && item->childTree.firstPtr) {
		/* save previuosly found item (if not ambigous) for
		 * possible fallback (few greedy match) */
		if (item->value != NULL) {
		    prevf = f;
		    prevItem = item;
		    prevParent = parent;
		}
		parent = &item->childTree;
		item = item->childTree.firstPtr;
		continue;
	    }
	    /* no children - return this item and current chars found */
	    start = f;
	    goto done;
	}

	item = item->nextPtr;

    } while (item != NULL);

    /* fallback (few greedy match) not ambigous (has a value) */
    if (prevItem != NULL) {
	item = prevItem;
	parent = prevParent;
	start = prevf;
    }

done:

    if (foundParent)
	*foundParent = parent;
    if (foundItem)
	*foundItem = item;
    return start;
}

void
TclStrIdxTreeFree(
    TclStrIdx *tree)
{
    while (tree != NULL) {
	TclStrIdx *t;
	Tcl_DecrRefCount(tree->key);
	if (tree->childTree.firstPtr != NULL) {
	    TclStrIdxTreeFree(tree->childTree.firstPtr);
	}
	t = tree, tree = tree->nextPtr;
	Tcl_Free(t);
    }
}

/*
 * Several bidirectional list primitives
 */
static inline void
TclStrIdxTreeInsertBranch(
    TclStrIdxTree *parent,
    TclStrIdx *item,
    TclStrIdx *child)
{
    if (parent->firstPtr == child)
	parent->firstPtr = item;
    if (parent->lastPtr == child)
	parent->lastPtr = item;
    if ( (item->nextPtr = child->nextPtr) ) {
	item->nextPtr->prevPtr = item;
	child->nextPtr = NULL;
    }
    if ( (item->prevPtr = child->prevPtr) ) {
	item->prevPtr->nextPtr = item;
	child->prevPtr = NULL;
    }
    item->childTree.firstPtr = child;
    item->childTree.lastPtr = child;
}

static inline void
TclStrIdxTreeAppend(
    TclStrIdxTree *parent,
    TclStrIdx	   *item)
{
    if (parent->lastPtr != NULL) {
	parent->lastPtr->nextPtr = item;
    }
    item->prevPtr = parent->lastPtr;
    item->nextPtr = NULL;
    parent->lastPtr = item;
    if (parent->firstPtr == NULL) {
	parent->firstPtr = item;
    }
}


/*
 *----------------------------------------------------------------------
 *
 * TclStrIdxTreeBuildFromList --
 *
 * Build or extend string indexed tree from tcl list.
 * If the values not given the values of built list are indices starts with 1.
 * Value of 0 is thereby reserved to the ambigous values.
 *
 * Important: by multiple lists, optimal tree can be created only if list with
 * larger strings used firstly.
 *
 * Results:
 *  Returns a standard Tcl result.
 *
 * Side effects:
 *  None.
 *
 *----------------------------------------------------------------------
 */

int
TclStrIdxTreeBuildFromList(
    TclStrIdxTree *idxTree,
    Tcl_Size lstc,
    Tcl_Obj  **lstv,
    void **values)
{
    Tcl_Obj  **lwrv;
    Tcl_Size i;
    int ret = TCL_ERROR;
    void *val;
    const char *s, *e, *f;
    TclStrIdx	*item;

    /* create lowercase reflection of the list keys */

    lwrv = (Tcl_Obj **)Tcl_Alloc(sizeof(Tcl_Obj*) * lstc);
    if (lwrv == NULL) {
	return TCL_ERROR;
    }
    for (i = 0; i < lstc; i++) {
	lwrv[i] = Tcl_DuplicateObj(lstv[i]);
	if (lwrv[i] == NULL) {
	    return TCL_ERROR;
	}
	Tcl_IncrRefCount(lwrv[i]);
	lwrv[i]->length = Tcl_UtfToLower(TclGetString(lwrv[i]));
    }

    /* build index tree of the list keys */
    for (i = 0; i < lstc; i++) {
	TclStrIdxTree *foundParent = idxTree;
	e = s = TclGetString(lwrv[i]);
	e += lwrv[i]->length;
	val = values ? values[i] : INT2PTR(i+1);

	/* ignore empty keys (impossible to index it) */
	if (lwrv[i]->length == 0) continue;

	item = NULL;
	if (idxTree->firstPtr != NULL) {
	    TclStrIdx  *foundItem;
	    f = TclStrIdxTreeSearch(&foundParent, &foundItem,
		idxTree, s, e);
	    /* if common prefix was found */
	    if (f > s) {
		/* ignore element if fulfilled or ambigous */
		if (f == e) {
		    continue;
		}
		/* if shortest key was found with the same value,
		 * just replace its current key with longest key */
		if ( foundItem->value == val
		  && foundItem->length <= lwrv[i]->length
		  && foundItem->length <= (f - s) /* only if found item is covered in full */
		  && foundItem->childTree.firstPtr == NULL
		) {
		    TclSetObjRef(foundItem->key, lwrv[i]);
		    foundItem->length = lwrv[i]->length;
		    continue;
		}
		/* split tree (e. g. j->(jan,jun) + jul == j->(jan,ju->(jun,jul)) )
		 * but don't split by fulfilled child of found item ( ii->iii->iiii ) */
		if (foundItem->length != (f - s)) {
		    /* first split found item (insert one between parent and found + new one) */
		    item = (TclStrIdx *)Tcl_Alloc(sizeof(TclStrIdx));
		    if (item == NULL) {
			goto done;
		    }
		    TclInitObjRef(item->key, foundItem->key);
		    item->length = f - s;
		    /* set value or mark as ambigous if not the same value of both */
		    item->value = (foundItem->value == val) ? val : NULL;
		    /* insert group item between foundParent and foundItem */
		    TclStrIdxTreeInsertBranch(foundParent, item, foundItem);
		    foundParent = &item->childTree;
		} else {
		    /* the new item should be added as child of found item */
		    foundParent = &foundItem->childTree;
		}
	    }
	}
	/* append item at end of found parent */
	item = (TclStrIdx *)Tcl_Alloc(sizeof(TclStrIdx));
	if (item == NULL) {
	    goto done;
	}
	item->childTree.lastPtr = item->childTree.firstPtr = NULL;
	TclInitObjRef(item->key, lwrv[i]);
	item->length = lwrv[i]->length;
	item->value = val;
	TclStrIdxTreeAppend(foundParent, item);
    };

    ret = TCL_OK;

done:

    if (lwrv != NULL) {
	for (i = 0; i < lstc; i++) {
	    Tcl_DecrRefCount(lwrv[i]);
	}
	Tcl_Free(lwrv);
    }

    if (ret != TCL_OK) {
	if (idxTree->firstPtr != NULL) {
	    TclStrIdxTreeFree(idxTree->firstPtr);
	}
    }

    return ret;
}


static void
StrIdxTreeObj_DupIntRepProc(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr);
static void
StrIdxTreeObj_FreeIntRepProc(Tcl_Obj *objPtr);
static void
StrIdxTreeObj_UpdateStringProc(Tcl_Obj *objPtr);

Tcl_ObjType StrIdxTreeObjType = {
    "str-idx-tree",		    /* name */
    StrIdxTreeObj_FreeIntRepProc,   /* freeIntRepProc */
    StrIdxTreeObj_DupIntRepProc,    /* dupIntRepProc */
    StrIdxTreeObj_UpdateStringProc, /* updateStringProc */
    NULL,			    /* setFromAnyProc */
    TCL_OBJTYPE_V0
};

Tcl_Obj*
TclStrIdxTreeNewObj()
{
    Tcl_Obj *objPtr = Tcl_NewObj();
    objPtr->internalRep.twoPtrValue.ptr1 = NULL;
    objPtr->internalRep.twoPtrValue.ptr2 = NULL;
    objPtr->typePtr = &StrIdxTreeObjType;
    /* return tree root in internal representation */
    return objPtr;
}

static void
StrIdxTreeObj_DupIntRepProc(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr)
{
    /* follow links (smart pointers) */
    if ( srcPtr->internalRep.twoPtrValue.ptr1 != NULL
      && srcPtr->internalRep.twoPtrValue.ptr2 == NULL
    ) {
	srcPtr = (Tcl_Obj*)srcPtr->internalRep.twoPtrValue.ptr1;
    }
    /* create smart pointer to it (ptr1 != NULL, ptr2 = NULL) */
    TclInitObjRef(*((Tcl_Obj **)&copyPtr->internalRep.twoPtrValue.ptr1),
	srcPtr);
    copyPtr->internalRep.twoPtrValue.ptr2 = NULL;
    copyPtr->typePtr = &StrIdxTreeObjType;
}

static void
StrIdxTreeObj_FreeIntRepProc(Tcl_Obj *objPtr)
{
    /* follow links (smart pointers) */
    if ( objPtr->internalRep.twoPtrValue.ptr1 != NULL
      && objPtr->internalRep.twoPtrValue.ptr2 == NULL
    ) {
	/* is a link */
	TclUnsetObjRef(*((Tcl_Obj **)&objPtr->internalRep.twoPtrValue.ptr1));
    } else {
	/* is a tree */
	TclStrIdxTree *tree = (TclStrIdxTree*)&objPtr->internalRep.twoPtrValue.ptr1;
	if (tree->firstPtr != NULL) {
	    TclStrIdxTreeFree(tree->firstPtr);
	}
	objPtr->internalRep.twoPtrValue.ptr1 = NULL;
	objPtr->internalRep.twoPtrValue.ptr2 = NULL;
    }
    objPtr->typePtr = NULL;
};

static void
StrIdxTreeObj_UpdateStringProc(Tcl_Obj *objPtr)
{
    /* currently only dummy empty string possible */
    objPtr->length = 0;
    objPtr->bytes = &tclEmptyString;
};

TclStrIdxTree *
TclStrIdxTreeGetFromObj(Tcl_Obj *objPtr) {
    /* follow links (smart pointers) */
    if (objPtr->typePtr != &StrIdxTreeObjType) {
	return NULL;
    }
    if ( objPtr->internalRep.twoPtrValue.ptr1 != NULL
      && objPtr->internalRep.twoPtrValue.ptr2 == NULL
    ) {
	objPtr = (Tcl_Obj*)objPtr->internalRep.twoPtrValue.ptr1;
    }
    /* return tree root in internal representation */
    return (TclStrIdxTree*)&objPtr->internalRep.twoPtrValue.ptr1;
}

/*
 * Several debug primitives
 */
#if 0
/* currently unused, debug resp. test purposes only */

static void
TclStrIdxTreePrint(
    Tcl_Interp *interp,
    TclStrIdx  *tree,
    int offs)
{
    Tcl_Obj *obj[2];
    const char *s;
    TclInitObjRef(obj[0], Tcl_NewStringObj("::puts", -1));
    while (tree != NULL) {
	s = TclGetString(tree->key) + offs;
	TclInitObjRef(obj[1], Tcl_ObjPrintf("%*s%.*s\t:%d",
		offs, "", tree->length - offs, s, tree->value));
	Tcl_PutsObjCmd(NULL, interp, 2, obj);
	TclUnsetObjRef(obj[1]);
	if (tree->childTree.firstPtr != NULL) {
	    TclStrIdxTreePrint(interp, tree->childTree.firstPtr, tree->length);
	}
	tree = tree->nextPtr;
    }
    TclUnsetObjRef(obj[0]);
}


int
TclStrIdxTreeTestObjCmd(
    ClientData clientData, Tcl_Interp *interp,
    int objc, Tcl_Obj *const objv[])
{
    const char *cs, *cin, *ret;

    static const char *const options[] = {
	"index", "puts-index", "findequal",
	NULL
    };
    enum optionInd {
	O_INDEX,  O_PUTS_INDEX, O_FINDEQUAL
    };
    int optionIndex;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "");
	return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], options,
	"option", 0, &optionIndex) != TCL_OK) {
	Tcl_SetErrorCode(interp, "CLOCK", "badOption",
		Tcl_GetString(objv[1]), (char *)NULL);
	return TCL_ERROR;
    }
    switch (optionIndex) {
    case O_FINDEQUAL:
	if (objc < 4) {
	    Tcl_WrongNumArgs(interp, 1, objv, "");
	    return TCL_ERROR;
	}
	cs = TclGetString(objv[2]);
	cin = TclGetString(objv[3]);
	ret = TclUtfFindEqual(
	    cs, cs + objv[1]->length, cin, cin + objv[2]->length);
	Tcl_SetObjResult(interp, Tcl_NewIntObj(ret - cs));
    break;
    case O_INDEX:
    case O_PUTS_INDEX: {
	Tcl_Obj **lstv;
	int i, lstc;
	TclStrIdxTree idxTree = {NULL, NULL};
	i = 1;
	while (++i < objc) {
	    if (TclListObjGetElements(interp, objv[i],
		    &lstc, &lstv) != TCL_OK) {
		return TCL_ERROR;
	    };
	    TclStrIdxTreeBuildFromList(&idxTree, lstc, lstv, NULL);
	}
	if (optionIndex == O_PUTS_INDEX) {
	    TclStrIdxTreePrint(interp, idxTree.firstPtr, 0);
	}
	TclStrIdxTreeFree(idxTree.firstPtr);
    }
    break;
    }

    return TCL_OK;
}

#endif

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

Added generic/tclStrIdxTree.h.








































































































































































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/*
 * tclStrIdxTree.h --
 *
 *	Declarations of string index tries and other primitives currently
 *  back-ported from tclSE.
 *
 * Copyright (c) 2016 Serg G. Brester (aka sebres)
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#ifndef _TCLSTRIDXTREE_H
#define _TCLSTRIDXTREE_H


/*
 * Main structures declarations of index tree and entry
 */

typedef struct TclStrIdxTree {
    struct TclStrIdx *firstPtr;
    struct TclStrIdx *lastPtr;
} TclStrIdxTree;

typedef struct TclStrIdx {
    struct TclStrIdxTree childTree;
    struct TclStrIdx *nextPtr;
    struct TclStrIdx *prevPtr;
    Tcl_Obj	*key;
    Tcl_Size length;
    void	*value;
} TclStrIdx;


/*
 *----------------------------------------------------------------------
 *
 * TclUtfFindEqual, TclUtfFindEqualNC --
 *
 *  Find largest part of string cs in string cin (case sensitive and not).
 *
 * Results:
 *  Return position of UTF character in cs after last equal character.
 *
 * Side effects:
 *  None.
 *
 *----------------------------------------------------------------------
 */

static inline const char *
TclUtfFindEqual(
    const char *cs,	/* UTF string to find in cin. */
    const char *cse,	/* End of cs */
    const char *cin,	/* UTF string will be browsed. */
    const char *cine)	/* End of cin */
{
    const char *ret = cs;
    Tcl_UniChar ch1, ch2;
    do {
	cs += TclUtfToUniChar(cs, &ch1);
	cin += TclUtfToUniChar(cin, &ch2);
	if (ch1 != ch2) break;
    } while ((ret = cs) < cse && cin < cine);
    return ret;
}

static inline const char *
TclUtfFindEqualNC(
    const char *cs,	/* UTF string to find in cin. */
    const char *cse,	/* End of cs */
    const char *cin,	/* UTF string will be browsed. */
    const char *cine,	/* End of cin */
    const char	     **cinfnd)	/* Return position in cin */
{
    const char *ret = cs;
    Tcl_UniChar ch1, ch2;
    do {
	cs += TclUtfToUniChar(cs, &ch1);
	cin += TclUtfToUniChar(cin, &ch2);
	if (ch1 != ch2) {
	    ch1 = Tcl_UniCharToLower(ch1);
	    ch2 = Tcl_UniCharToLower(ch2);
	    if (ch1 != ch2) break;
	}
	*cinfnd = cin;
    } while ((ret = cs) < cse && cin < cine);
    return ret;
}

static inline const char *
TclUtfFindEqualNCInLwr(
    const char *cs,	/* UTF string (in anycase) to find in cin. */
    const char *cse,	/* End of cs */
    const char *cin,	/* UTF string (in lowercase) will be browsed. */
    const char *cine,	/* End of cin */
    const char	     **cinfnd)	/* Return position in cin */
{
    const char *ret = cs;
    Tcl_UniChar ch1, ch2;
    do {
	cs += TclUtfToUniChar(cs, &ch1);
	cin += TclUtfToUniChar(cin, &ch2);
	if (ch1 != ch2) {
	    ch1 = Tcl_UniCharToLower(ch1);
	    if (ch1 != ch2) break;
	}
	*cinfnd = cin;
    } while ((ret = cs) < cse && cin < cine);
    return ret;
}

/*
 * Primitives to safe set, reset and free references.
 */

#define TclUnsetObjRef(obj) \
    do { \
	if (obj != NULL) { \
	    Tcl_DecrRefCount(obj); \
	    obj = NULL; \
	} \
    } while (0)
#define TclInitObjRef(obj, val) \
    do { \
	obj = val; \
	if (obj) { \
	    Tcl_IncrRefCount(obj); \
	} \
    } while (0)
#define TclSetObjRef(obj, val) \
    do { \
	Tcl_Obj *nval = val; \
	if (obj != nval) { \
	    Tcl_Obj *prev = obj; \
	    TclInitObjRef(obj, nval); \
	    if (prev != NULL) { \
		Tcl_DecrRefCount(prev); \
	    }; \
	} \
    } while (0)

/*
 * Prototypes of module functions.
 */

MODULE_SCOPE const char*
		    TclStrIdxTreeSearch(TclStrIdxTree **foundParent,
			TclStrIdx **foundItem, TclStrIdxTree *tree,
			const char *start, const char *end);

MODULE_SCOPE int    TclStrIdxTreeBuildFromList(TclStrIdxTree *idxTree,
			Tcl_Size lstc, Tcl_Obj **lstv, void **values);

MODULE_SCOPE Tcl_Obj*
		    TclStrIdxTreeNewObj();

MODULE_SCOPE TclStrIdxTree*
		    TclStrIdxTreeGetFromObj(Tcl_Obj *objPtr);

#if 0
/* currently unused, debug resp. test purposes only */
MODULE_SCOPE Tcl_ObjCmdProc TclStrIdxTreeTestObjCmd;
#endif

#endif /* _TCLSTRIDXTREE_H */

Changes to library/clock.tcl.

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#----------------------------------------------------------------------
#
# clock.tcl --
#
#	This file implements the portions of the [clock] ensemble that are
#	coded in Tcl.  Refer to the users' manual to see the description of
#	the [clock] command and its subcommands.
#
#
#----------------------------------------------------------------------
#
# Copyright © 2004-2007 Kevin B. Kenny
# Copyright © 2015 Sergey G. Brester aka sebres.
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
#----------------------------------------------------------------------

# msgcat 1.7 features are used. We need access to the Registry on Windows
# msgcat 1.7 features are used.
# systems.

uplevel \#0 {
    package require msgcat 1.7
package require msgcat 1.7
    if { $::tcl_platform(platform) eq {windows} } {
	if { [catch { package require registry 1.1 }] } {
	    namespace eval ::tcl::clock [list variable NoRegistry {}]
	}
    }
}

# Put the library directory into the namespace for the ensemble so that the
# library code can find message catalogs and time zone definition files.

namespace eval ::tcl::clock \
    [list variable LibDir [info library]]

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    namespace export milliseconds
    namespace export scan
    namespace export seconds
    namespace export add

    # Import the message catalog commands that we use.

    namespace import ::msgcat::mcload
    namespace import ::msgcat::mclocale
    proc mc {args} { tailcall ::msgcat::mcn [namespace current] {*}$args }
    namespace import ::msgcat::mcpackagelocale

}

#----------------------------------------------------------------------
#
# ::tcl::clock::Initialize --
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    variable MINWIDE -9223372036854775808
    variable MAXWIDE 9223372036854775807

    # Day before Leap Day

    variable FEB_28	       58

    # Default configuration

    ::tcl::unsupported::clock::configure -current-locale  [mclocale]
    #::tcl::unsupported::clock::configure -default-locale  C
    #::tcl::unsupported::clock::configure -year-century    2000 \
    #          -century-switch  38

    # Translation table to map Windows TZI onto cities, so that the Olson
    # rules can apply.  In some cases the mapping is ambiguous, so it's wise
    # to specify $::env(TCL_TZ) rather than simply depending on the system
    # time zone.

    # The keys are long lists of values obtained from the time zone
    # information in the Registry.  In order, the list elements are:
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	{36000 0 3600 0 3 0 5 3 0 0 0 0 10 0 5 2 0 0 0}  :Australia/Sydney
	{39600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}   :Pacific/Noumea
	{43200 0 3600 0 3 0 3 3 0 0 0 0 10 0 1 2 0 0 0}  :Pacific/Auckland
	{43200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}   :Pacific/Fiji
	{46800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}   :Pacific/Tongatapu
    }]

    # Groups of fields that specify the date, priorities, and code bursts that
    # determine Julian Day Number given those groups.  The code in [clock
    # scan] will choose the highest priority (lowest numbered) set of fields
    # that determines the date.

    variable DateParseActions {

	{ seconds } 0 {}

	{ julianDay } 1 {}

	{ era century yearOfCentury month dayOfMonth } 2 {
	    dict set date year [expr { 100 * [dict get $date century]
				       + [dict get $date yearOfCentury] }]
	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
			  $changeover]
	}
	{ era century yearOfCentury dayOfYear } 2 {
	    dict set date year [expr { 100 * [dict get $date century]
				       + [dict get $date yearOfCentury] }]
	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
			  $changeover]
	}

	{ century yearOfCentury month dayOfMonth } 3 {
	    dict set date era CE
	    dict set date year [expr { 100 * [dict get $date century]
				       + [dict get $date yearOfCentury] }]
	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
			  $changeover]
	}
	{ century yearOfCentury dayOfYear } 3 {
	    dict set date era CE
	    dict set date year [expr { 100 * [dict get $date century]
				       + [dict get $date yearOfCentury] }]
	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
			  $changeover]
	}
	{ iso8601Century iso8601YearOfCentury iso8601Week dayOfWeek } 3 {
	    dict set date era CE
	    dict set date iso8601Year \
		[expr { 100 * [dict get $date iso8601Century]
			+ [dict get $date iso8601YearOfCentury] }]
	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
			 $changeover]
	}

	{ yearOfCentury month dayOfMonth } 4 {
	    set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
	    dict set date era CE
	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
			  $changeover]
	}
	{ yearOfCentury dayOfYear } 4 {
	    set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
	    dict set date era CE
	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
			  $changeover]
	}
	{ iso8601YearOfCentury iso8601Week dayOfWeek } 4 {
	    set date [InterpretTwoDigitYear \
			  $date[set date {}] $baseTime \
			  iso8601YearOfCentury iso8601Year]
	    dict set date era CE
	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
			 $changeover]
	}

	{ month dayOfMonth } 5 {
	    set date [AssignBaseYear $date[set date {}] \
			  $baseTime $timeZone $changeover]
	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
			  $changeover]
	}
	{ dayOfYear } 5 {
	    set date [AssignBaseYear $date[set date {}] \
			  $baseTime $timeZone $changeover]
	    set date [GetJulianDayFromEraYearDay $date[set date {}] \
			 $changeover]
	}
	{ iso8601Week dayOfWeek } 5 {
	    set date [AssignBaseIso8601Year $date[set date {}] \
			  $baseTime $timeZone $changeover]
	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
			 $changeover]
	}

	{ dayOfMonth } 6 {
	    set date [AssignBaseMonth $date[set date {}] \
			  $baseTime $timeZone $changeover]
	    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
			  $changeover]
	}

	{ dayOfWeek } 7 {
	    set date [AssignBaseWeek $date[set date {}] \
			  $baseTime $timeZone $changeover]
	    set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
			 $changeover]
	}

	{} 8 {
	    set date [AssignBaseJulianDay $date[set date {}] \
			  $baseTime $timeZone $changeover]
	}
    }

    # Groups of fields that specify time of day, priorities, and code that
    # processes them

    variable TimeParseActions {

	seconds 1 {}

	{ hourAMPM minute second amPmIndicator } 2 {
	    dict set date secondOfDay [InterpretHMSP $date]
	}
	{ hour minute second } 2 {
	    dict set date secondOfDay [InterpretHMS $date]
	}

	{ hourAMPM minute amPmIndicator } 3 {
	    dict set date second 0
	    dict set date secondOfDay [InterpretHMSP $date]
	}
	{ hour minute } 3 {
	    dict set date second 0
	    dict set date secondOfDay [InterpretHMS $date]
	}

	{ hourAMPM amPmIndicator } 4 {
	    dict set date minute 0
	    dict set date second 0
	    dict set date secondOfDay [InterpretHMSP $date]
	}
	{ hour } 4 {
	    dict set date minute 0
	    dict set date second 0
	    dict set date secondOfDay [InterpretHMS $date]
	}

	{ } 5 {
	    dict set date secondOfDay 0
	}
    }

    # Legacy time zones, used primarily for parsing RFC822 dates.

    variable LegacyTimeZone [dict create \
	gmt	+0000 \
	ut	+0000 \
	utc	+0000 \
	bst	+0100 \
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	x	-1100 \
	y	-1200 \
	z	+0000 \
    ]

    # Caches

    variable LocaleNumeralCache {};	# Dictionary whose keys are locale
					# names and whose values are pairs
    variable LocFmtMap [dict create];	# Dictionary with localized format maps

					# comprising regexes matching numerals
					# in the given locales and dictionaries
					# mapping the numerals to their numeric
					# values.
    # variable CachedSystemTimeZone;    # If 'CachedSystemTimeZone' exists,
					# it contains the value of the
					# system time zone, as determined from
					# the environment.
    variable TimeZoneBad {};	        # Dictionary whose keys are time zone
    variable TimeZoneBad [dict create]; # Dictionary whose keys are time zone
    					# names and whose values are 1 if
					# the time zone is unknown and 0
    					# if it is known.
    variable TZData;			# Array whose keys are time zone names
					# and whose values are lists of quads
					# comprising start time, UTC offset,
					# Daylight Saving Time indicator, and
					# time zone abbreviation.
    variable FormatProc;		# Array mapping format group
					# and locale to the name of a procedure
					# that renders the given format

    variable mcLocales	 [dict create];	# Dictionary with loaded locales
    variable mcMergedCat [dict create];	# Dictionary with merged locale catalogs
}
::tcl::clock::Initialize

#----------------------------------------------------------------------
#
# clock format --
#
#	Formats a count of seconds since the Posix Epoch as a time of day.
#
# The 'clock format' command formats times of day for output.  Refer to the
# user documentation to see what it does.
#
#----------------------------------------------------------------------

proc ::tcl::clock::format { args } {

    variable FormatProc
    variable TZData

    lassign [ParseFormatArgs {*}$args] format locale timezone
    set locale [string tolower $locale]
    set clockval [lindex $args 0]

    # Get the data for time changes in the given zone

    if {$timezone eq ""} {
	set timezone [GetSystemTimeZone]
    }
    if {![info exists TZData($timezone)]} {
	if {[catch {SetupTimeZone $timezone} retval opts]} {
	    dict unset opts -errorinfo
	    return -options $opts $retval
	}
    }

    # Build a procedure to format the result. Cache the built procedure's name
    # in the 'FormatProc' array to avoid losing its internal representation,
    # which contains the name resolution.

    set procName formatproc'$format'$locale
    set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
    if {[info exists FormatProc($procName)]} {
	set procName $FormatProc($procName)
    } else {
	set FormatProc($procName) \
	    [ParseClockFormatFormat $procName $format $locale]
    }

    return [$procName $clockval $timezone]

}

#----------------------------------------------------------------------
#
# ParseClockFormatFormat --
#
#	Builds and caches a procedure that formats a time value.
#
# Parameters:
#	format -- Format string to use
#	locale -- Locale in which the format string is to be interpreted
#
# Results:
#	Returns the name of the newly-built procedure.
#
#----------------------------------------------------------------------

proc ::tcl::clock::ParseClockFormatFormat {procName format locale} {

    if {[namespace which $procName] ne {}} {
	return $procName
    }

    # Map away the locale-dependent composite format groups

    EnterLocale $locale

    # Change locale if a fresh locale has been given on the command line.

    try {
	return [ParseClockFormatFormat2 $format $locale $procName]
    } trap CLOCK {result opts} {
	dict unset opts -errorinfo
	return -options $opts $result
    }
}

proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
    set didLocaleEra 0
    set didLocaleNumerals 0
    set preFormatCode \
	[string map [list @GREGORIAN_CHANGE_DATE@ \
				       [mc GREGORIAN_CHANGE_DATE]] \
	     {
		 variable TZData
		 set date [GetDateFields $clockval \
			       $TZData($timezone) \
			       @GREGORIAN_CHANGE_DATE@]
	     }]
    set formatString {}
    set substituents {}
    set state {}

    set format [LocalizeFormat $locale $format]

    foreach char [split $format {}] {
	switch -exact -- $state {
	    {} {
		if { [string equal % $char] } {
		    set state percent
		} else {
		    append formatString $char
		}
	    }
	    percent {			# Character following a '%' character
		set state {}
		switch -exact -- $char {
		    % {			# A literal character, '%'
			append formatString %%
		    }
		    a {			# Day of week, abbreviated
			append formatString %s
			append substituents \
			    [string map \
				 [list @DAYS_OF_WEEK_ABBREV@ \
				      [list [mc DAYS_OF_WEEK_ABBREV]]] \
				 { [lindex @DAYS_OF_WEEK_ABBREV@ \
					[expr {[dict get $date dayOfWeek] \
						   % 7}]]}]
		    }
		    A {			# Day of week, spelt out.
			append formatString %s
			append substituents \
			    [string map \
				 [list @DAYS_OF_WEEK_FULL@ \
				      [list [mc DAYS_OF_WEEK_FULL]]] \
				 { [lindex @DAYS_OF_WEEK_FULL@ \
					[expr {[dict get $date dayOfWeek] \
						   % 7}]]}]
		    }
		    b - h {		# Name of month, abbreviated.
			append formatString %s
			append substituents \
			    [string map \
				 [list @MONTHS_ABBREV@ \
				      [list [mc MONTHS_ABBREV]]] \
				 { [lindex @MONTHS_ABBREV@ \
					[expr {[dict get $date month]-1}]]}]
		    }
		    B {			# Name of month, spelt out
			append formatString %s
			append substituents \
			    [string map \
				 [list @MONTHS_FULL@ \
				      [list [mc MONTHS_FULL]]] \
				 { [lindex @MONTHS_FULL@ \
					[expr {[dict get $date month]-1}]]}]
		    }
		    C {			# Century number
			append formatString %02d
			append substituents \
			    { [expr {[dict get $date year] / 100}]}
		    }
		    d {			# Day of month, with leading zero
			append formatString %02d
			append substituents { [dict get $date dayOfMonth]}
		    }
		    e {			# Day of month, without leading zero
			append formatString %2d
			append substituents { [dict get $date dayOfMonth]}
		    }
		    E {			# Format group in a locale-dependent
					# alternative era
			set state percentE
			if {!$didLocaleEra} {
			    append preFormatCode \
				[string map \
				     [list @LOCALE_ERAS@ \
					  [list [mc LOCALE_ERAS]]] \
				     {
					 set date [GetLocaleEra \
						       $date[set date {}] \
						       @LOCALE_ERAS@]}] \n
			    set didLocaleEra 1
			}

			if {!$didLocaleNumerals} {
			    append preFormatCode \
				[list set localeNumerals \
				     [mc LOCALE_NUMERALS]] \n
			    set didLocaleNumerals 1
# mcget --
			}
		    }
		    g {			# Two-digit year relative to ISO8601
					# week number
			append formatString %02d
			append substituents \
			    { [expr { [dict get $date iso8601Year] % 100 }]}
		    }
		    G {			# Four-digit year relative to ISO8601
					# week number
			append formatString %02d
			append substituents { [dict get $date iso8601Year]}
		    }
		    H {			# Hour in the 24-hour day, leading zero
			append formatString %02d
			append substituents \
#
#	Return the merged translation catalog for the ::tcl::clock namespace
#	Searching of catalog is similar to "msgcat::mc".
#
#	Contrary to "msgcat::mc" may additionally load a package catalog
#	on demand.
			    { [expr { [dict get $date localSeconds] \
					  / 3600 % 24}]}
		    }
		    I {			# Hour AM/PM, with leading zero
			append formatString %02d
			append substituents \
#
# Arguments:
			    { [expr { ( ( ( [dict get $date localSeconds] \
					    % 86400 ) \
					  + 86400 \
					  - 3600 ) \
					/ 3600 ) \
				      % 12 + 1 }] }
		    }
		    j {			# Day of year (001-366)
			append formatString %03d
			append substituents { [dict get $date dayOfYear]}
		    }
		    J {			# Julian Day Number
			append formatString %07ld
			append substituents { [dict get $date julianDay]}
		    }
		    k {			# Hour (0-23), no leading zero
			append formatString %2d
			append substituents \
			    { [expr { [dict get $date localSeconds]
				      / 3600
				      % 24 }]}
		    }
		    l {			# Hour (12-11), no leading zero
			append formatString %2d
			append substituents \
			    { [expr { ( ( ( [dict get $date localSeconds]
					   % 86400 )
					 + 86400
					 - 3600 )
				       / 3600 )
				     % 12 + 1 }]}
		    }
		    m {			# Month number, leading zero
			append formatString %02d
			append substituents { [dict get $date month]}
		    }
		    M {			# Minute of the hour, leading zero
			append formatString %02d
			append substituents \
			    { [expr { [dict get $date localSeconds]
				      / 60
				      % 60 }]}
		    }
		    n {			# A literal newline
			append formatString \n
		    }
		    N {			# Month number, no leading zero
			append formatString %2d
			append substituents { [dict get $date month]}
		    }
		    O {			# A format group in the locale's
					# alternative numerals
			set state percentO
			if {!$didLocaleNumerals} {
			    append preFormatCode \
				[list set localeNumerals \
				     [mc LOCALE_NUMERALS]] \n
			    set didLocaleNumerals 1
			}
		    }
		    p {			# Localized 'AM' or 'PM' indicator
					# converted to uppercase
			append formatString %s
			append preFormatCode \
			    [list set AM [string toupper [mc AM]]] \n \
			    [list set PM [string toupper [mc PM]]] \n
			append substituents \
			    { [expr {(([dict get $date localSeconds]
#	loc	The locale used for translation.
				       % 86400) < 43200) ?
				     $AM : $PM}]}
		    }
		    P {			# Localized 'AM' or 'PM' indicator
			append formatString %s
			append preFormatCode \
			    [list set am [mc AM]] \n \
			    [list set pm [mc PM]] \n
			append substituents \
			    { [expr {(([dict get $date localSeconds]
				       % 86400) < 43200) ?
				     $am : $pm}]}

#
		    }
		    Q {			# Hi, Jeff!
# Results:
			append formatString %s
			append substituents { [FormatStarDate $date]}
		    }
		    s {			# Seconds from the Posix Epoch
			append formatString %s
			append substituents { [dict get $date seconds]}
#	Returns the dictionary object as whole catalog of the package/locale.
#
proc ::tcl::clock::mcget {loc} {
		    }
		    S {			# Second of the minute, with
			# leading zero
    variable mcMergedCat
    switch -- $loc system {
	set loc [GetSystemLocale]
			append formatString %02d
			append substituents \
			    { [expr { [dict get $date localSeconds]
    } current {
	set loc [mclocale]
				      % 60 }]}
		    }
    }
		    t {			# A literal tab character
			append formatString \t
		    }
    if {$loc ne {}} {
		    u {			# Day of the week (1-Monday, 7-Sunday)
			append formatString %1d
    	set loc [string tolower $loc]
			append substituents { [dict get $date dayOfWeek]}
		    }
    }
		    U {			# Week of the year (00-53). The
					# first Sunday of the year is the
					# first day of week 01
			append formatString %02d
			append preFormatCode {
			    set dow [dict get $date dayOfWeek]
			    if { $dow == 7 } {
				set dow 0
			    }
			    incr dow
			    set UweekNumber \
				[expr { ( [dict get $date dayOfYear]
					  - $dow + 7 )
					/ 7 }]
			}
			append substituents { $UweekNumber}
		    }
		    V {			# The ISO8601 week number
			append formatString %02d
			append substituents { [dict get $date iso8601Week]}
		    }
		    w {			# Day of the week (0-Sunday,
					# 6-Saturday)
			append formatString %1d
			append substituents \
			    { [expr { [dict get $date dayOfWeek] % 7 }]}
		    }
		    W {			# Week of the year (00-53). The first
					# Monday of the year is the first day
					# of week 01.
			append preFormatCode {
			    set WweekNumber \
				[expr { ( [dict get $date dayOfYear]
					  - [dict get $date dayOfWeek]
					  + 7 )
					/ 7 }]
			}
			append formatString %02d
			append substituents { $WweekNumber}
		    }
		    y {			# The two-digit year of the century
			append formatString %02d
			append substituents \
			    { [expr { [dict get $date year] % 100 }]}
		    }

		    Y {			# The four-digit year
			append formatString %04d
			append substituents { [dict get $date year]}
		    }
		    z {			# The time zone as hours and minutes
					# east (+) or west (-) of Greenwich
			append formatString %s
			append substituents { [FormatNumericTimeZone \
						   [dict get $date tzOffset]]}
		    }
		    Z {			# The name of the time zone
			append formatString %s
			append substituents { [dict get $date tzName]}
		    }
		    % {			# A literal percent character
			append formatString %%
		    }
		    default {		# An unknown escape sequence
			append formatString %% $char
		    }
		}
	    }
	    percentE {			# Character following %E
		set state {}
		switch -exact -- $char {
		    E {
			append formatString %s
			append substituents { } \
			    [string map \
				 [list @BCE@ [list [mc BCE]] \
				      @CE@ [list [mc CE]]] \
				      {[dict get {BCE @BCE@ CE @CE@} \
					    [dict get $date era]]}]
		    }
    # try to retrieve now if already available:
    if {[dict exists $mcMergedCat $loc]} {
	return [dict get $mcMergedCat $loc]
    }
		    C {			# Locale-dependent era
			append formatString %s
			append substituents { [dict get $date localeEra]}
		    }
		    y {			# Locale-dependent year of the era
			append preFormatCode {
			    set y [dict get $date localeYear]
			    if { $y >= 0 && $y < 100 } {
				set Eyear [lindex $localeNumerals $y]
			    } else {
				set Eyear $y
			    }
			}
			append formatString %s
			append substituents { $Eyear}
		    }
		    default {		# Unknown %E format group
			append formatString %%E $char
		    }
		}
	    }
	    percentO {			# Character following %O
		set state {}
		switch -exact -- $char {
		    d - e {		# Day of the month in alternative
			# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [dict get $date dayOfMonth]]}
		    }
		    H - k {		# Hour of the day in alternative
					# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { [dict get $date localSeconds]
					   / 3600
					   % 24 }]]}
		    }
		    I - l {		# Hour (12-11) AM/PM in alternative
					# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { ( ( ( [dict get $date localSeconds]
						 % 86400 )
					       + 86400
					       - 3600 )
					     / 3600 )
					   % 12 + 1 }]]}
		    }

		    m {			# Month number in alternative numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals [dict get $date month]]}
		    }
		    M {			# Minute of the hour in alternative
					# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { [dict get $date localSeconds]
					   / 60
					   % 60 }]]}
		    }
		    S {			# Second of the minute in alternative
					# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { [dict get $date localSeconds]
					   % 60 }]]}
		    }
		    u {			# Day of the week (Monday=1,Sunday=7)
					# in alternative numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [dict get $date dayOfWeek]]}
			}
		    w {			# Day of the week (Sunday=0,Saturday=6)
					# in alternative numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { [dict get $date dayOfWeek] % 7 }]]}
		    }
		    y {			# Year of the century in alternative
					# numerals
			append formatString %s
			append substituents \
			    { [lindex $localeNumerals \
				   [expr { [dict get $date year] % 100 }]]}
		    }
		    default {	# Unknown format group
			append formatString %%O $char
		    }
		}
	    }
	}
    }

    # get locales list for given locale (de_de -> {de_de de {}})
    # Clean up any improperly terminated groups

    variable mcLocales
    switch -exact -- $state {
	percent {
	    append formatString %%
	}
	percentE {
	    append retval %%E
	}
	percentO {
	    append retval %%O
	}
    }

    if {[dict exists $mcLocales $loc]} {
    proc $procName {clockval timezone} "
	$preFormatCode
	return \[::format [list $formatString] $substituents\]
    "

	set loclist [dict get $mcLocales $loc]
    #    puts [list $procName [info args $procName] [info body $procName]]

    } else {
    return $procName
}

	# save current locale:
#----------------------------------------------------------------------
#
# clock scan --
#
#	Inputs a count of seconds since the Posix Epoch as a time of day.
#
# The 'clock scan' command scans times of day on input.  Refer to the user
# documentation to see what it does.
#
#----------------------------------------------------------------------

proc ::tcl::clock::scan { args } {

    set format {}

	set prevloc [mclocale]
    # Check the count of args

	# lazy load catalog on demand (set it will load the catalog)
    if { [llength $args] < 1 || [llength $args] % 2 != 1 } {
	set cmdName "clock scan"
	return -code error \
	    -errorcode [list CLOCK wrongNumArgs] \
	    "wrong \# args: should be\
	     \"$cmdName string\
	     ?-base seconds?\
	     ?-format string? ?-gmt boolean?\
	     ?-locale LOCALE? ?-timezone ZONE?\""
    }

    # Set defaults

    set base [clock seconds]
    set string [lindex $args 0]
    set format {}
    set gmt 0
    set locale c
	mcpackagelocale set $loc
    set timezone [GetSystemTimeZone]

	set loclist [msgcat::mcutil::getpreferences $loc]
    # Pick up command line options.

	dict set $mcLocales $loc $loclist
    foreach { flag value } [lreplace $args 0 0] {
	switch -exact -- $flag {
	    -b - -ba - -bas - -base {
		set base $value
	    }
	    -f - -fo - -for - -form - -forma - -format {
		set saw(-format) {}
		set format $value
	    }
	    -g - -gm - -gmt {
		set saw(-gmt) {}
		set gmt $value
	    }
	    -l - -lo - -loc - -loca - -local - -locale {
		set saw(-locale) {}
		set locale [string tolower $value]
	    }
	    -t - -ti - -tim - -time - -timez - -timezo - -timezon - -timezone {
		set saw(-timezone) {}
		set timezone $value
	    }
	    default {
		return -code error \
		    -errorcode [list CLOCK badOption $flag] \
		    "bad option \"$flag\":\
		     must be -base, -format, -gmt, -locale, or -timezone"
	    }
	}
    }

	# restore:
    # Check options for validity

	if {$prevloc ne $loc} {
    if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
	return -code error \
	    -errorcode [list CLOCK gmtWithTimezone] \
	    "cannot use -gmt and -timezone in same call"
    }
    if { [catch { expr { wide($base) } } result] } {
	return -code error "expected integer but got \"$base\""
    }
    if { ![string is boolean -strict $gmt] } {
	return -code error "expected boolean value but got \"$gmt\""
    } elseif { $gmt } {
	set timezone :GMT
    }

    if { ![info exists saw(-format)] } {
	# Perhaps someday we'll localize the legacy code. Right now, it's not
	# localized.
	if { [info exists saw(-locale)] } {
	    return -code error \
		-errorcode [list CLOCK flagWithLegacyFormat] \
		"legacy \[clock scan\] does not support -locale"

	}
	return [FreeScan $string $base $timezone $locale]
    }

    # Change locale if a fresh locale has been given on the command line.

    EnterLocale $locale

    try {
	# Map away the locale-dependent composite format groups

	   mcpackagelocale set $prevloc
	set scanner [ParseClockScanFormat $format $locale]
	return [$scanner $string $base $timezone]
    } trap CLOCK {result opts} {
	# Conceal location of generation of expected errors
	dict unset opts -errorinfo
	return -options $opts $result
    }
}

	}
    }
    # get whole catalog:
#----------------------------------------------------------------------
#
# FreeScan --
#
#	Scans a time in free format
#
# Parameters:
#	string - String containing the time to scan
#	base - Base time, expressed in seconds from the Epoch
#	timezone - Default time zone in which the time will be expressed
#	locale - (Unused) Name of the locale where the time will be scanned.
#
# Results:
#	Returns the date and time extracted from the string in seconds from
#	the epoch
#
#----------------------------------------------------------------------

    mcMerge $loclist
proc ::tcl::clock::FreeScan { string base timezone locale } {

}
    variable TZData

    # Get the data for time changes in the given zone

    try {
	SetupTimeZone $timezone
    } on error {retval opts} {
	dict unset opts -errorinfo
	return -options $opts $retval
    }

    # Extract year, month and day from the base time for the parser to use as
    # defaults

    set date [GetDateFields $base $TZData($timezone) 2361222]
    dict set date secondOfDay [expr {
	[dict get $date localSeconds] % 86400
    }]

    # Parse the date.  The parser will return a list comprising date, time,
    # time zone, relative month/day/seconds, relative weekday, ordinal month.

    try {
	set scanned [Oldscan $string \
		     [dict get $date year] \
		     [dict get $date month] \
		     [dict get $date dayOfMonth]]
	lassign $scanned \
	    parseDate parseTime parseZone parseRel \
	    parseWeekday parseOrdinalMonth
    } on error message {
	return -code error \
	    "unable to convert date-time string \"$string\": $message"
    }

    # If the caller supplied a date in the string, update the 'date' dict with
    # the value. If the caller didn't specify a time with the date, default to
    # midnight.

    if { [llength $parseDate] > 0 } {
	lassign $parseDate y m d
	if { $y < 100 } {
	    if { $y >= 39 } {
		incr y 1900
	    } else {
		incr y 2000
	    }
	}
	dict set date era CE
	dict set date year $y
	dict set date month $m
	dict set date dayOfMonth $d
	if { $parseTime eq {} } {
	    set parseTime 0
	}
    }

    # If the caller supplied a time zone in the string, it comes back as a
    # two-element list; the first element is the number of minutes east of
    # Greenwich, and the second is a Daylight Saving Time indicator (1 == yes,
    # 0 == no, -1 == unknown). We make it into a time zone indicator of
    # +-hhmm.

    if { [llength $parseZone] > 0 } {
	lassign $parseZone minEast dstFlag
	set timezone [FormatNumericTimeZone \
			  [expr { 60 * $minEast + 3600 * $dstFlag }]]
	SetupTimeZone $timezone
    }
    dict set date tzName $timezone

    # Assemble date, time, zone into seconds-from-epoch

    set date [GetJulianDayFromEraYearMonthDay $date[set date {}] 2361222]
    if { $parseTime ne {} } {
	dict set date secondOfDay $parseTime
    } elseif { [llength $parseWeekday] != 0
	       || [llength $parseOrdinalMonth] != 0
	       || ( [llength $parseRel] != 0
		    && ( [lindex $parseRel 0] != 0
			 || [lindex $parseRel 1] != 0 ) ) } {
	dict set date secondOfDay 0
    }

    dict set date localSeconds [expr {
	-210866803200
	+ ( 86400 * wide([dict get $date julianDay]) )
	+ [dict get $date secondOfDay]
    }]
    dict set date tzName $timezone
    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) 2361222]
    set seconds [dict get $date seconds]

    # Do relative times

    if { [llength $parseRel] > 0 } {
	lassign $parseRel relMonth relDay relSecond
	set seconds [add $seconds \
			 $relMonth months $relDay days $relSecond seconds \
			 -timezone $timezone -locale $locale]
    }

    # Do relative weekday

    if { [llength $parseWeekday] > 0 } {
	lassign $parseWeekday dayOrdinal dayOfWeek
	set date2 [GetDateFields $seconds $TZData($timezone) 2361222]
	dict set date2 era CE
	set jdwkday [WeekdayOnOrBefore $dayOfWeek [expr {
	    [dict get $date2 julianDay] + 6
	}]]
	incr jdwkday [expr { 7 * $dayOrdinal }]
	if { $dayOrdinal > 0 } {
	    incr jdwkday -7
	}
	dict set date2 secondOfDay \
	    [expr { [dict get $date2 localSeconds] % 86400 }]
	dict set date2 julianDay $jdwkday
	dict set date2 localSeconds [expr {
	    -210866803200
	    + ( 86400 * wide([dict get $date2 julianDay]) )
	    + [dict get $date secondOfDay]
	}]
	dict set date2 tzName $timezone
	set date2 [ConvertLocalToUTC $date2[set date2 {}] $TZData($timezone) \
		       2361222]
	set seconds [dict get $date2 seconds]

    }

    # Do relative month

    if { [llength $parseOrdinalMonth] > 0 } {
	lassign $parseOrdinalMonth monthOrdinal monthNumber
	if { $monthOrdinal > 0 } {
	    set monthDiff [expr { $monthNumber - [dict get $date month] }]
	    if { $monthDiff <= 0 } {
		incr monthDiff 12
	    }
	    incr monthOrdinal -1
	} else {
	    set monthDiff [expr { [dict get $date month] - $monthNumber }]
	    if { $monthDiff >= 0 } {
		incr monthDiff -12
	    }
	    incr monthOrdinal
	}

	set seconds [add $seconds $monthOrdinal years $monthDiff months \
			 -timezone $timezone -locale $locale]
    }

# mcMerge --
    return $seconds
}


#
#	Merge message catalog dictionaries to one dictionary.
#----------------------------------------------------------------------
#
# ParseClockScanFormat --
#
# Arguments:
#	Parses a format string given to [clock scan -format]
#
# Parameters:
#	formatString - The format being parsed
#	locale - The current locale
#	locales		List of locales to merge.
#
# Results:
#	Constructs and returns a procedure that accepts the string being
#	scanned, the base time, and the time zone.  The procedure will either
#	return the scanned time or else throw an error that should be rethrown
#	to the caller of [clock scan]
#
# Side effects:
#	The given procedure is defined in the ::tcl::clock namespace.  Scan
#	procedures are not deleted once installed.
#
# Why do we parse dates by defining a procedure to parse them?  The reason is
# that by doing so, we have one convenient place to cache all the information:
# the regular expressions that match the patterns (which will be compiled),
# the code that assembles the date information, everything lands in one place.
# In this way, when a given format is reused at run time, all the information
# of how to apply it is available in a single place.
#
#----------------------------------------------------------------------

#	Returns the (weak pointer) to merged dictionary of message catalog.
proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
    # Check whether the format has been parsed previously, and return the
    # existing recognizer if it has.

#
    set procName scanproc'$formatString'$locale
    set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
    if { [namespace which $procName] != {} } {
	return $procName
    }

proc ::tcl::clock::mcMerge {locales} {
    variable DateParseActions
    variable TimeParseActions

    # Localize the %x, %X, etc. groups

    set formatString [LocalizeFormat $locale $formatString]

    # Condense whitespace

    regsub -all {[[:space:]]+} $formatString { } formatString

    # Walk through the groups of the format string.  In this loop, we
    # accumulate:
    #	- a regular expression that matches the string,
    #   - the count of capturing brackets in the regexp
    #   - a set of code that post-processes the fields captured by the regexp,
    #   - a dictionary whose keys are the names of fields that are present
    #     in the format string.

    set re {^[[:space:]]*}
    set captureCount 0
    set postcode {}
    set fieldSet [dict create]
    set fieldCount 0
    set postSep {}
    set state {}

    foreach c [split $formatString {}] {
	switch -exact -- $state {
	    {} {
		if { $c eq "%" } {
		    set state %
		} elseif { $c eq " " } {
		    append re {[[:space:]]+}
		} else {
		    if { ! [string is alnum $c] } {
			append re "\\"
		    }
		    append re $c
		}
	    }
	    % {
		set state {}
		switch -exact -- $c {
		    % {
			append re %
    variable mcMergedCat
		    }
		    { } {
			append re "\[\[:space:\]\]*"
		    }
		    a - A { 		# Day of week, in words
			set l {}
    if {[dict exists $mcMergedCat [set loc [lindex $locales 0]]]} {
			foreach \
			    i {7 1 2 3 4 5 6} \
			    abr [mc DAYS_OF_WEEK_ABBREV] \
			    full [mc DAYS_OF_WEEK_FULL] {
				dict set l [string tolower $abr] $i
				dict set l [string tolower $full] $i
				incr i
			    }
			lassign [UniquePrefixRegexp $l] regex lookup
			append re ( $regex )
			dict set fieldSet dayOfWeek [incr fieldCount]
			append postcode "dict set date dayOfWeek \[" \
			    "dict get " [list $lookup] " " \
	return [dict get $mcMergedCat $loc]
			    \[ {string tolower $field} [incr captureCount] \] \
			    "\]\n"
		    }
    }
		    b - B - h {		# Name of month
			set i 0
			set l {}
			foreach \
			    abr [mc MONTHS_ABBREV] \
			    full [mc MONTHS_FULL] {
				incr i
    # package msgcat currently does not provide possibility to get whole catalog:
    upvar ::msgcat::Msgs Msgs
				dict set l [string tolower $abr] $i
				dict set l [string tolower $full] $i
			    }
			lassign [UniquePrefixRegexp $l] regex lookup
			append re ( $regex )
			dict set fieldSet month [incr fieldCount]
			append postcode "dict set date month \[" \
			    "dict get " [list $lookup] \
			    " " \[ {string tolower $field} \
			    [incr captureCount] \] \
			    "\]\n"
		    }
		    C {			# Gregorian century
			append re \\s*(\\d\\d?)
			dict set fieldSet century [incr fieldCount]
			append postcode "dict set date century \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    d - e {		# Day of month
			append re \\s*(\\d\\d?)
			dict set fieldSet dayOfMonth [incr fieldCount]
			append postcode "dict set date dayOfMonth \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    E {			# Prefix for locale-specific codes
			set state %E
		    }
		    g {			# ISO8601 2-digit year
			append re \\s*(\\d\\d)
			dict set fieldSet iso8601YearOfCentury \
			    [incr fieldCount]
			append postcode \
			    "dict set date iso8601YearOfCentury \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    G {			# ISO8601 4-digit year
			append re \\s*(\\d\\d)(\\d\\d)
			dict set fieldSet iso8601Century [incr fieldCount]
			dict set fieldSet iso8601YearOfCentury \
			    [incr fieldCount]
			append postcode \
			    "dict set date iso8601Century \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n" \
			    "dict set date iso8601YearOfCentury \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    H - k {		# Hour of day
			append re \\s*(\\d\\d?)
			dict set fieldSet hour [incr fieldCount]
			append postcode "dict set date hour \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    I - l {		# Hour, AM/PM
			append re \\s*(\\d\\d?)
			dict set fieldSet hourAMPM [incr fieldCount]
    set ns ::tcl::clock
			append postcode "dict set date hourAMPM \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    j {			# Day of year
			append re \\s*(\\d\\d?\\d?)
			dict set fieldSet dayOfYear [incr fieldCount]
			append postcode "dict set date dayOfYear \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    J {			# Julian Day Number
			append re \\s*(\\d+)
			dict set fieldSet julianDay [incr fieldCount]
			append postcode "dict set date julianDay \[" \
			    "::scan \$field" [incr captureCount] " %ld" \
			    "\]\n"
		    }
		    m - N {		# Month number
			append re \\s*(\\d\\d?)
			dict set fieldSet month [incr fieldCount]
			append postcode "dict set date month \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    M {			# Minute
			append re \\s*(\\d\\d?)
			dict set fieldSet minute [incr fieldCount]
			append postcode "dict set date minute \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    n {			# Literal newline
			append re \\n
		    }
		    O {			# Prefix for locale numerics
			set state %O
    # Merge sequential locales (in reverse order, e. g. {} -> en -> en_en):
    if {[llength $locales] > 1} {
	set mrgcat [mcMerge [lrange $locales 1 end]]
		    }
		    p - P { 		# AM/PM indicator
			set l [list [string tolower [mc AM]] 0 \
				   [string tolower [mc PM]] 1]
			lassign [UniquePrefixRegexp $l] regex lookup
			append re ( $regex )
			dict set fieldSet amPmIndicator [incr fieldCount]
	if {[dict exists $Msgs $ns $loc]} {
			append postcode "dict set date amPmIndicator \[" \
			    "dict get " [list $lookup] " \[string tolower " \
	    set mrgcat [dict merge $mrgcat [dict get $Msgs $ns $loc]]
			    "\$field" \
			    [incr captureCount] \
			    "\]\]\n"
		    }
		    Q {			# Hi, Jeff!
			append re {Stardate\s+([-+]?\d+)(\d\d\d)[.](\d)}
			incr captureCount
			dict set fieldSet seconds [incr fieldCount]
	    dict set mrgcat L $loc
			append postcode {dict set date seconds } \[ \
			    {ParseStarDate $field} [incr captureCount] \
			    { $field} [incr captureCount] \
			    { $field} [incr captureCount] \
			    \] \n
		    }
		    s {			# Seconds from Posix Epoch
			# This next case is insanely difficult, because it's
			# problematic to determine whether the field is
			# actually within the range of a wide integer.
			append re {\s*([-+]?\d+)}
			dict set fieldSet seconds [incr fieldCount]
			append postcode {dict set date seconds } \[ \
			    {ScanWide $field} [incr captureCount] \] \n
		    }
		    S {			# Second
			append re \\s*(\\d\\d?)
			dict set fieldSet second [incr fieldCount]
			append postcode "dict set date second \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    t {			# Literal tab character
			append re \\t
		    }
		    u - w {		# Day number within week, 0 or 7 == Sun
					# 1=Mon, 6=Sat
			append re \\s*(\\d)
			dict set fieldSet dayOfWeek [incr fieldCount]
			append postcode {::scan $field} [incr captureCount] \
			    { %d dow} \n \
			    {
				if { $dow == 0 } {
				    set dow 7
				} elseif { $dow > 7 } {
	} else {
				    return -code error \
					-errorcode [list CLOCK badDayOfWeek] \
					"day of week is greater than 7"
				}
				dict set date dayOfWeek $dow
			    }
		    }
		    U {			# Week of year. The first Sunday of
					# the year is the first day of week
					# 01. No scan rule uses this group.
			append re \\s*\\d\\d?
		    }
		    V {			# Week of ISO8601 year

	    # be sure a duplicate is created, don't overwrite {} (common) locale:
			append re \\s*(\\d\\d?)
			dict set fieldSet iso8601Week [incr fieldCount]
			append postcode "dict set date iso8601Week \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    W {			# Week of the year (00-53). The first
					# Monday of the year is the first day
					# of week 01. No scan rule uses this
					# group.
			append re \\s*\\d\\d?
		    }
		    y {			# Two-digit Gregorian year
			append re \\s*(\\d\\d?)
			dict set fieldSet yearOfCentury [incr fieldCount]
			append postcode "dict set date yearOfCentury \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
		    Y {			# 4-digit Gregorian year
			append re \\s*(\\d\\d)(\\d\\d)
			dict set fieldSet century [incr fieldCount]
			dict set fieldSet yearOfCentury [incr fieldCount]
			append postcode \
			    "dict set date century \[" \
	    set mrgcat [dict merge $mrgcat [dict create L $loc]]
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n" \
			    "dict set date yearOfCentury \[" \
			    "::scan \$field" [incr captureCount] " %d" \
			    "\]\n"
		    }
	}
		    z - Z {			# Time zone name
			append re {(?:([-+]\d\d(?::?\d\d(?::?\d\d)?)?)|([[:alnum:]]{1,4}))}
			dict set fieldSet tzName [incr fieldCount]
			append postcode \
			    {if } \{ { $field} [incr captureCount] \
			    { ne "" } \} { } \{ \n \
			    {dict set date tzName $field} \
			    $captureCount \n \
			    \} { else } \{ \n \
			    {dict set date tzName } \[ \
    } else {
	if {[dict exists $Msgs $ns $loc]} {
			    {ConvertLegacyTimeZone $field} \
			    [incr captureCount] \] \n \
			    \} \n \
		    }
		    % {			# Literal percent character
			append re %
		    }
		    default {
			append re %
			if { ! [string is alnum $c] } {
			    append re \\
			    }
			append re $c
		    }
		}
	    }
	    %E {
		switch -exact -- $c {
		    C {			# Locale-dependent era
			set d {}
	    set mrgcat [dict get $Msgs $ns $loc]
			foreach triple [mc LOCALE_ERAS] {
			    lassign $triple t symbol year
			    dict set d [string tolower $symbol] $year
	    dict set mrgcat L $loc
			}
			lassign [UniquePrefixRegexp $d] regex lookup
			append re (?: $regex )
		    }
		    E {
			set l {}
	} else {
			dict set l [string tolower [mc BCE]] BCE
			dict set l [string tolower [mc CE]] CE
			dict set l b.c.e. BCE
			dict set l c.e. CE
	    # be sure a duplicate is created, don't overwrite {} (common) locale:
	    set mrgcat [dict create L $loc]
			dict set l b.c. BCE
			dict set l a.d. CE
			lassign [UniquePrefixRegexp $l] regex lookup
			append re ( $regex )
			dict set fieldSet era [incr fieldCount]
			append postcode "dict set date era \["\
			    "dict get " [list $lookup] \
			    { } \[ {string tolower $field} \
			    [incr captureCount] \] \
			    "\]\n"
		    }
	}
		    y {			# Locale-dependent year of the era
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			incr captureCount
		    }
    }
		    default {
			append re %E
			if { ! [string is alnum $c] } {
			    append re \\
			    }
			append re $c
		    }
		}
		set state {}
    dict set mcMergedCat $loc $mrgcat
	    }
	    %O {
		switch -exact -- $c {
    # return smart reference (shared dict as object with exact one ref-counter)
		    d - e {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet dayOfMonth [incr fieldCount]
			append postcode "dict set date dayOfMonth \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
    return $mrgcat
			    "\]\n"
		    }
}
		    H - k {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet hour [incr fieldCount]
			append postcode "dict set date hour \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
			    "\]\n"
		    }
		    I - l {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet hourAMPM [incr fieldCount]
			append postcode "dict set date hourAMPM \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
			    "\]\n"
		    }
		    m {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet month [incr fieldCount]
			append postcode "dict set date month \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
			    "\]\n"
		    }
		    M {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet minute [incr fieldCount]
			append postcode "dict set date minute \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
			    "\]\n"
		    }
		    S {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet second [incr fieldCount]
			append postcode "dict set date second \[" \
			    "dict get " [list $lookup] " \$field" \
			    [incr captureCount] \
			    "\]\n"
		    }
		    u - w {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet dayOfWeek [incr fieldCount]
			append postcode "set dow \[dict get " [list $lookup] \
			    { $field} [incr captureCount] \] \n \
			    {
				if { $dow == 0 } {
				    set dow 7
				} elseif { $dow > 7 } {
				    return -code error \
					-errorcode [list CLOCK badDayOfWeek] \
					"day of week is greater than 7"
				}
				dict set date dayOfWeek $dow
			    }
		    }
		    y {
			lassign [LocaleNumeralMatcher $locale] regex lookup
			append re $regex
			dict set fieldSet yearOfCentury [incr fieldCount]
			append postcode {dict set date yearOfCentury } \[ \
			    {dict get } [list $lookup] { $field} \
			    [incr captureCount] \] \n
		    }
		    default {
			append re %O
			if { ! [string is alnum $c] } {
			    append re \\
			    }
			append re $c
		    }
		}
		set state {}
	    }
	}
    }

    # Clean up any unfinished format groups

    append re $state \\s*\$

    # Build the procedure

    set procBody {}
    append procBody "variable ::tcl::clock::TZData" \n
    append procBody "if \{ !\[ regexp -nocase [list $re] \$string ->"
    for { set i 1 } { $i <= $captureCount } { incr i } {
	append procBody " " field $i
    }
    append procBody "\] \} \{" \n
    append procBody {
	return -code error -errorcode [list CLOCK badInputString] \
	    {input string does not match supplied format}
    }
    append procBody \}\n
    append procBody "set date \[dict create\]" \n
    append procBody {dict set date tzName $timeZone} \n
    append procBody $postcode
    append procBody [list set changeover [mc GREGORIAN_CHANGE_DATE]] \n

    # Set up the time zone before doing anything with a default base date
    # that might need a timezone to interpret it.

    if { ![dict exists $fieldSet seconds]
	    && ![dict exists $fieldSet starDate] } {
	if { [dict exists $fieldSet tzName] } {
	    append procBody {
		set timeZone [dict get $date tzName]
	    }
	}
	append procBody {
	    ::tcl::clock::SetupTimeZone $timeZone
	}
    }

    # Add code that gets Julian Day Number from the fields.

    append procBody [MakeParseCodeFromFields $fieldSet $DateParseActions]

    # Get time of day

    append procBody [MakeParseCodeFromFields $fieldSet $TimeParseActions]

    # Assemble seconds from the Julian day and second of the day.
    # Convert to local time unless epoch seconds or stardate are
    # being processed - they're always absolute

    if { ![dict exists $fieldSet seconds]
	 && ![dict exists $fieldSet starDate] } {
	append procBody {
	    if { [dict get $date julianDay] > 5373484 } {
		return -code error -errorcode [list CLOCK dateTooLarge] \
		    "requested date too large to represent"
	    }

	    dict set date localSeconds [expr {
		-210866803200
		+ ( 86400 * wide([dict get $date julianDay]) )
		+ [dict get $date secondOfDay]
	    }]
	}

	# Finally, convert the date to local time

	append procBody {
	    set date [::tcl::clock::ConvertLocalToUTC $date[set date {}] \
			  $TZData($timeZone) $changeover]
	}
    }

    # Return result

    append procBody {return [dict get $date seconds]} \n

    proc $procName { string baseTime timeZone } $procBody

    # puts [list proc $procName [list string baseTime timeZone] $procBody]

    return $procName
}

#----------------------------------------------------------------------
#
# LocaleNumeralMatcher --
#
#	Composes a regexp that captures the numerals in the given locale, and
#	a dictionary to map them to conventional numerals.
#
# Parameters:
#	locale - Name of the current locale
#
# Results:
#	Returns a two-element list comprising the regexp and the dictionary.
#
# Side effects:
#	Caches the result.
#
#----------------------------------------------------------------------

# GetSystemLocale --
proc ::tcl::clock::LocaleNumeralMatcher {l} {
    variable LocaleNumeralCache

#
    if { ![dict exists $LocaleNumeralCache $l] } {
	set d {}
	set i 0
	set sep \(
	foreach n [mc LOCALE_NUMERALS] {
	    dict set d $n $i
	    regsub -all {[^[:alnum:]]} $n \\\\& subex
	    append re $sep $subex
	    set sep |
	    incr i
	}
	append re \)
	dict set LocaleNumeralCache $l [list $re $d]
    }
    return [dict get $LocaleNumeralCache $l]
}



#	Determines the system locale, which corresponds to "system"
#	keyword for locale parameter of 'clock' command.
#
#----------------------------------------------------------------------
#
# UniquePrefixRegexp --
#
#	Composes a regexp that performs unique-prefix matching.  The RE
#	matches one of a supplied set of strings, or any unique prefix
#	thereof.
#
# Parameters:
#	data - List of alternating match-strings and values.
#	       Match-strings with distinct values are considered
#	       distinct.
#	None.
#
# Results:
#	Returns a two-element list.  The first is a regexp that matches any
#	Returns the system locale.
#	unique prefix of any of the strings.  The second is a dictionary whose
#	keys are match values from the regexp and whose values are the
#	corresponding values from 'data'.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::UniquePrefixRegexp { data } {
proc ::tcl::clock::GetSystemLocale {} {
    # The 'successors' dictionary will contain, for each string that is a
    # prefix of any key, all characters that may follow that prefix.  The
    # 'prefixMapping' dictionary will have keys that are prefixes of keys and
    # values that correspond to the keys.

    if { $::tcl_platform(platform) ne {windows} } {
    set prefixMapping [dict create]
    set successors [dict create {} {}]

	# On a non-windows platform, the 'system' locale is the same as
    # Walk the key-value pairs

	# the 'current' locale
    foreach { key value } $data {
	# Construct all prefixes of the key;

	set prefix {}
	foreach char [split $key {}] {
	    set oldPrefix $prefix
	    dict set successors $oldPrefix $char {}
	    append prefix $char

	    # Put the prefixes in the 'prefixMapping' and 'successors'
	    # dictionaries

	    dict lappend prefixMapping $prefix $value
	    if { ![dict exists $successors $prefix] } {
		dict set successors $prefix {}
	    }
	}
    }

    # Identify those prefixes that designate unique values, and those that are
    # the full keys

    set uniquePrefixMapping {}
    dict for { key valueList } $prefixMapping {
	if { [llength $valueList] == 1 } {
	    dict set uniquePrefixMapping $key [lindex $valueList 0]
	}
    }
    foreach { key value } $data {
	dict set uniquePrefixMapping $key $value
    }

    # Construct the re.

    return [list \
	return [mclocale]
		[MakeUniquePrefixRegexp $successors $uniquePrefixMapping {}] \
		$uniquePrefixMapping]
}
    }

#----------------------------------------------------------------------
#
# MakeUniquePrefixRegexp --
#

#	Service procedure for 'UniquePrefixRegexp' that constructs a regular
#	expresison that matches the unique prefixes.
#
# Parameters:
#	successors - Dictionary whose keys are all prefixes
#		     of keys passed to 'UniquePrefixRegexp' and whose
#		     values are dictionaries whose keys are the characters
#		     that may follow those prefixes.
#	uniquePrefixMapping - Dictionary whose keys are the unique
#			      prefixes and whose values are not examined.
#	prefixString - Current prefix being processed.
#
# Results:
#	Returns a constructed regular expression that matches the set of
#	unique prefixes beginning with the 'prefixString'.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

    # On a windows platform, the 'system' locale is adapted from the
proc ::tcl::clock::MakeUniquePrefixRegexp { successors
					  uniquePrefixMapping
					  prefixString } {

    # 'current' locale by applying the date and time formats from the
    # Get the characters that may follow the current prefix string

    # Control Panel.  First, load the 'current' locale if it's not yet
    set schars [lsort -ascii [dict keys [dict get $successors $prefixString]]]
    if { [llength $schars] == 0 } {
	return {}
    }

    # loaded
    # If there is more than one successor character, or if the current prefix
    # is a unique prefix, surround the generated re with non-capturing
    # parentheses.

    set re {}
    if {
	[dict exists $uniquePrefixMapping $prefixString]
	|| [llength $schars] > 1
    } then {
	append re "(?:"
    }

    # Generate a regexp that matches the successors.

    set sep ""
    foreach { c } $schars {
	set nextPrefix $prefixString$c
	regsub -all {[^[:alnum:]]} $c \\\\& rechar
	append re $sep $rechar \
	    [MakeUniquePrefixRegexp \
		 $successors $uniquePrefixMapping $nextPrefix]
	set sep |
    }


    mcpackagelocale set [mclocale]
    # If the current prefix is a unique prefix, make all following text
    # optional. Otherwise, if there is more than one successor character,
    # close the non-capturing parentheses.

    if { [dict exists $uniquePrefixMapping $prefixString] } {
	append re ")?"
    } elseif { [llength $schars] > 1 } {
	append re ")"
    }

    # Make a new locale string for the system locale, and get the
    return $re
}

    # Control Panel information
#----------------------------------------------------------------------
#
# MakeParseCodeFromFields --
#
#	Composes Tcl code to extract the Julian Day Number from a dictionary
#	containing date fields.
#
# Parameters:
#	dateFields -- Dictionary whose keys are fields of the date,
#	              and whose values are the rightmost positions
#		      at which those fields appear.
#	parseActions -- List of triples: field set, priority, and
#			code to emit.  Smaller priorities are better, and
#			the list must be in ascending order by priority
#
# Results:
#	Returns a burst of code that extracts the day number from the given
#	date.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {

    set currPrio 999
    set currFieldPos [list]
    set currCodeBurst {
	error "in ::tcl::clock::MakeParseCodeFromFields: can't happen"
    }

    foreach { fieldSet prio parseAction } $parseActions {
	# If we've found an answer that's better than any that follow, quit
	# now.

	if { $prio > $currPrio } {
	    break
	}


    set locale [mclocale]_windows
	# Accumulate the field positions that are used in the current field
	# grouping.

    if { ! [mcpackagelocale present $locale] } {
	set fieldPos [list]
	set ok true
	foreach field $fieldSet {
	    if { ! [dict exists $dateFields $field] } {
		set ok 0
		break
	    }
	    lappend fieldPos [dict get $dateFields $field]
	}

	LoadWindowsDateTimeFormats $locale
	# Quit if we don't have a complete set of fields
	if { !$ok } {
	    continue
	}
    }

	# Determine whether the current answer is better than the last.

	set fPos [lsort -integer -decreasing $fieldPos]

	if { $prio ==  $currPrio } {
	    foreach currPos $currFieldPos newPos $fPos {
		if {
		    ![string is integer $newPos]
		    || ![string is integer $currPos]
		    || $newPos > $currPos
		} then {
		    break
		}
		if { $newPos < $currPos } {
		    set ok 0
		    break
		}
	    }
	}
	if { !$ok } {
	    continue
	}

	# Remember the best possibility for extracting date information

	set currPrio $prio
	set currFieldPos $fPos
	set currCodeBurst $parseAction
    }

    return $currCodeBurst
    return $locale
}

#----------------------------------------------------------------------
#
# EnterLocale --
#
#	Switch [mclocale] to a given locale if necessary
#
# Parameters:
#	locale -- Desired locale
#
# Results:
#	Returns the locale that was previously current.
#
# Side effects:
#	Does [mclocale].  If necessary, loads the designated locale's files.
#	Does [mclocale].  If necessary, loades the designated locale's files.
#
#----------------------------------------------------------------------

proc ::tcl::clock::EnterLocale { locale } {
    if { $locale eq {system} } {
    switch -- $locale system {
	if { $::tcl_platform(platform) ne {windows} } {
	    # On a non-windows platform, the 'system' locale is the same as
	    # the 'current' locale
    	set locale [GetSystemLocale]
    } current {

	    set locale current
	set locale [mclocale]
	} else {
	    # On a windows platform, the 'system' locale is adapted from the
	    # 'current' locale by applying the date and time formats from the
	    # Control Panel.  First, load the 'current' locale if it's not yet
	    # loaded

	    mcpackagelocale set [mclocale]

	    # Make a new locale string for the system locale, and get the
	    # Control Panel information

	    set locale [mclocale]_windows
	    if { ! [mcpackagelocale present $locale] } {
		LoadWindowsDateTimeFormats $locale
	    }
    }
    # Select the locale, eventually load it
    mcpackagelocale set $locale
    return $locale
}

#----------------------------------------------------------------------
#
# _hasRegistry --
#
#	Helper that checks whether registry module is available (Windows only)
#	and loads it on demand.
#
#----------------------------------------------------------------------
proc ::tcl::clock::_hasRegistry {} {
    set res 0
    if { $::tcl_platform(platform) eq {windows} } {
	if { [catch { package require registry 1.1 }] } {
	    # try to load registry directly from root (if uninstalled / development env):
	    if {[regexp {[/\\]library$} [info library]]} {catch {
		load [lindex \
			[glob -tails -directory [file dirname [info nameofexecutable]] \
			    tclreg*[expr {[::tcl::pkgconfig get debug] ? {g} : {}}].dll] 0 \
		] registry
	    }}
	}
	if { [namespace which -command ::registry] ne "" } {
	    set res 1
    }
	}
    if { $locale eq {current}} {
	set locale [mclocale]
    }
    proc ::tcl::clock::_hasRegistry {} [list return $res]
    # Eventually load the locale
    return $res
    mcpackagelocale set $locale
}

#----------------------------------------------------------------------
#
# LoadWindowsDateTimeFormats --
#
#	Load the date/time formats from the Control Panel in Windows and
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# default strings can be obtained if the Registry query fails.
#
#----------------------------------------------------------------------

proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
    # Bail out if we can't find the Registry

    variable NoRegistry
    if { [info exists NoRegistry] } return
    if { ![_hasRegistry] } return

    if { ![catch {
	registry get "HKEY_CURRENT_USER\\Control Panel\\International" \
	    sShortDate
    } string] } {
	set quote {}
	set datefmt {}
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#
#	Map away locale-dependent format groups in a clock format.
#
# Parameters:
#	locale -- Current [mclocale] locale, supplied to avoid
#		  an extra call
#	format -- Format supplied to [clock scan] or [clock format]
#	mcd    -- Message catalog dictionary for current locale (read-only,
#		  don't store it to avoid shared references).
#
# Results:
#	Returns the string with locale-dependent composite format groups
#	substituted out.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::LocalizeFormat { locale format } {
proc ::tcl::clock::LocalizeFormat { locale format mcd } {
    variable LocFmtMap

    # message catalog key to cache this format
    # get map list cached or build it:
    set key FORMAT_$format

    if { [::msgcat::mcexists -exactlocale -exactnamespace $key] } {
    if {[dict exists $LocFmtMap $locale]} {
	set mlst [dict get $LocFmtMap $locale]
	return [mc $key]
    }
    # Handle locale-dependent format groups by mapping them out of the format
    # string.  Note that the order of the [string map] operations is
    # significant because later formats can refer to later ones; for example
    # %c can refer to %X, which in turn can refer to %T.
    } else {
	# Handle locale-dependent format groups by mapping them out of the format
	# string.  Note that the order of the [string map] operations is
	# significant because later formats can refer to later ones; for example
	# %c can refer to %X, which in turn can refer to %T.

    set list {
	%% %%
	%D %m/%d/%Y
	%+ {%a %b %e %H:%M:%S %Z %Y}
    }
	set mlst {
	    %% %%
	    %D %m/%d/%Y
	    %+ {%a %b %e %H:%M:%S %Z %Y}
	}
    lappend list %EY [string map $list [mc LOCALE_YEAR_FORMAT]]
    lappend list %T  [string map $list [mc TIME_FORMAT_24_SECS]]
    lappend list %R  [string map $list [mc TIME_FORMAT_24]]
    lappend list %r  [string map $list [mc TIME_FORMAT_12]]
    lappend list %X  [string map $list [mc TIME_FORMAT]]
    lappend list %EX [string map $list [mc LOCALE_TIME_FORMAT]]
    lappend list %x  [string map $list [mc DATE_FORMAT]]
    lappend list %Ex [string map $list [mc LOCALE_DATE_FORMAT]]
    lappend list %c  [string map $list [mc DATE_TIME_FORMAT]]
    lappend list %Ec [string map $list [mc LOCALE_DATE_TIME_FORMAT]]
    set format [string map $list $format]

	lappend mlst %EY [string map $mlst [dict get $mcd LOCALE_YEAR_FORMAT]]
    ::msgcat::mcset $locale $key $format
    return $format
}

	lappend mlst %T  [string map $mlst [dict get $mcd TIME_FORMAT_24_SECS]]
#----------------------------------------------------------------------
#
# FormatNumericTimeZone --
#
#	Formats a time zone as +hhmmss
#
# Parameters:
#	z - Time zone in seconds east of Greenwich
#
# Results:
#	Returns the time zone formatted in a numeric form
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::FormatNumericTimeZone { z } {
    if { $z < 0 } {
	set z [expr { - $z }]
	set retval -
    } else {
	set retval +
    }
    append retval [::format %02d [expr { $z / 3600 }]]
    set z [expr { $z % 3600 }]
    append retval [::format %02d [expr { $z / 60 }]]
    set z [expr { $z % 60 }]
    if { $z != 0 } {
	append retval [::format %02d $z]
    }
    return $retval
}

#----------------------------------------------------------------------
#
# FormatStarDate --
#
#	Formats a date as a StarDate.
#
# Parameters:
#	date - Dictionary containing 'year', 'dayOfYear', and
#	       'localSeconds' fields.
#
# Results:
#	Returns the given date formatted as a StarDate.
#
# Side effects:
#	None.
#
# Jeff Hobbs put this in to support an atrocious pun about Tcl being
# "Enterprise ready."  Now we're stuck with it.
#
#----------------------------------------------------------------------

proc ::tcl::clock::FormatStarDate { date } {
    variable Roddenberry

    # Get day of year, zero based

    set doy [expr { [dict get $date dayOfYear] - 1 }]

    # Determine whether the year is a leap year

    set lp [IsGregorianLeapYear $date]

    # Convert day of year to a fractional year

    if { $lp } {
	set fractYear [expr { 1000 * $doy / 366 }]
    } else {
	set fractYear [expr { 1000 * $doy / 365 }]
    }

    # Put together the StarDate

    return [::format "Stardate %02d%03d.%1d" \
		[expr { [dict get $date year] - $Roddenberry }] \
		$fractYear \
		[expr { [dict get $date localSeconds] % 86400
			/ ( 86400 / 10 ) }]]
}

#----------------------------------------------------------------------
#
# ParseStarDate --
#
#	Parses a StarDate
#
# Parameters:
#	year - Year from the Roddenberry epoch
#	fractYear - Fraction of a year specifying the day of year.
#	fractDay - Fraction of a day
#
# Results:
#	Returns a count of seconds from the Posix epoch.
#
# Side effects:
#	None.
#
# Jeff Hobbs put this in to support an atrocious pun about Tcl being
# "Enterprise ready."  Now we're stuck with it.
#
#----------------------------------------------------------------------

	lappend mlst %R  [string map $mlst [dict get $mcd TIME_FORMAT_24]]
proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
    variable Roddenberry

	lappend mlst %r  [string map $mlst [dict get $mcd TIME_FORMAT_12]]
    # Build a tentative date from year and fraction.

	lappend mlst %X  [string map $mlst [dict get $mcd TIME_FORMAT]]
    set date [dict create \
		  gregorian 1 \
		  era CE \
		  year [expr { $year + $Roddenberry }] \
		  dayOfYear [expr { $fractYear * 365 / 1000 + 1 }]]
    set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]

	lappend mlst %EX [string map $mlst [dict get $mcd LOCALE_TIME_FORMAT]]
    # Determine whether the given year is a leap year

	lappend mlst %x  [string map $mlst [dict get $mcd DATE_FORMAT]]
    set lp [IsGregorianLeapYear $date]

	lappend mlst %Ex [string map $mlst [dict get $mcd LOCALE_DATE_FORMAT]]
    # Reconvert the fractional year according to whether the given year is a
    # leap year

	lappend mlst %c  [string map $mlst [dict get $mcd DATE_TIME_FORMAT]]
    if { $lp } {
	dict set date dayOfYear \
	    [expr { $fractYear * 366 / 1000 + 1 }]
    } else {
	dict set date dayOfYear \
	    [expr { $fractYear * 365 / 1000 + 1 }]
    }
    dict unset date julianDay
    dict unset date gregorian
    set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]

	lappend mlst %Ec [string map $mlst [dict get $mcd LOCALE_DATE_TIME_FORMAT]]
    return [expr {
	86400 * [dict get $date julianDay]
	- 210866803200
	+ ( 86400 / 10 ) * $fractDay
    }]
}

#----------------------------------------------------------------------
#
# ScanWide --
#
#	Scans a wide integer from an input
#
# Parameters:
#	str - String containing a decimal wide integer
#
# Results:
#	Returns the string as a pure wide integer.  Throws an error if the
#	string is misformatted or out of range.
#
#----------------------------------------------------------------------

proc ::tcl::clock::ScanWide { str } {
    set count [::scan $str {%ld %c} result junk]
    if { $count != 1 } {
	return -code error -errorcode [list CLOCK notAnInteger $str] \
	    "\"$str\" is not an integer"
    }
    if { [incr result 0] != $str } {
	return -code error -errorcode [list CLOCK dateTooLarge] \
	    "integer value too large to represent"
    }
    return $result
}

#----------------------------------------------------------------------
#
# InterpretTwoDigitYear --
#
#	Given a date that contains only the year of the century, determines
#	the target value of a two-digit year.
#
# Parameters:
#	date - Dictionary containing fields of the date.
#	baseTime - Base time relative to which the date is expressed.
#	twoDigitField - Name of the field that stores the two-digit year.
#			Default is 'yearOfCentury'
#	fourDigitField - Name of the field that will receive the four-digit
#	                 year.  Default is 'year'
#
# Results:
#	Returns the dictionary augmented with the four-digit year, stored in
#	the given key.
#
# Side effects:
#	None.
#
# The current rule for interpreting a two-digit year is that the year shall be
# between 1937 and 2037, thus staying within the range of a 32-bit signed
# value for time.  This rule may change to a sliding window in future
# versions, so the 'baseTime' parameter (which is currently ignored) is
# provided in the procedure signature.
#
#----------------------------------------------------------------------

proc ::tcl::clock::InterpretTwoDigitYear { date baseTime
					   { twoDigitField yearOfCentury }
					   { fourDigitField year } } {
    set yr [dict get $date $twoDigitField]
    if { $yr <= 37 } {
	dict set date $fourDigitField [expr { $yr + 2000 }]
    } else {
	dict set date $fourDigitField [expr { $yr + 1900 }]
    }
    return $date
}

#----------------------------------------------------------------------
#

# AssignBaseYear --
#
#	Places the number of the current year into a dictionary.
#
# Parameters:
#	date - Dictionary value to update
#	baseTime - Base time from which to extract the year, expressed
#		   in seconds from the Posix epoch
#	timezone - the time zone in which the date is being scanned
#	changeover - the Julian Day on which the Gregorian calendar
#		     was adopted in the target locale.
#
# Results:
#	Returns the dictionary with the current year assigned.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
    variable TZData

    # Find the Julian Day Number corresponding to the base time, and
    # find the Gregorian year corresponding to that Julian Day.

    set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]

    # Store the converted year

    dict set date era [dict get $date2 era]
    dict set date year [dict get $date2 year]

    return $date
}

#----------------------------------------------------------------------
#
# AssignBaseIso8601Year --
#
#	Determines the base year in the ISO8601 fiscal calendar.
#
# Parameters:
#	date - Dictionary containing the fields of the date that
#	       is to be augmented with the base year.
#	baseTime - Base time expressed in seconds from the Posix epoch.
#	timeZone - Target time zone
#	changeover - Julian Day of adoption of the Gregorian calendar in
#		     the target locale.
#
# Results:
#	Returns the given date with "iso8601Year" set to the
#	base year.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
    variable TZData

    # Find the Julian Day Number corresponding to the base time

    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]

    # Calculate the ISO8601 date and transfer the year

    dict set date era CE
	dict set LocFmtMap $locale $mlst
    dict set date iso8601Year [dict get $date2 iso8601Year]
    return $date
}
    }

#----------------------------------------------------------------------
#
# AssignBaseMonth --
#
#	Places the number of the current year and month into a
#	dictionary.
#
# Parameters:
#	date - Dictionary value to update
#	baseTime - Time from which the year and month are to be
#	           obtained, expressed in seconds from the Posix epoch.
#	timezone - Name of the desired time zone
#	changeover - Julian Day on which the Gregorian calendar was adopted.
#
# Results:
#	Returns the dictionary with the base year and month assigned.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

    # translate copy of format (don't use format object here, because otherwise
proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
    variable TZData

    # it can lose its internal representation (string map - convert to unicode)
    # Find the year and month corresponding to the base time

    set locfmt [string map $mlst [string range " $format" 1 end]]
    set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]
    dict set date era [dict get $date2 era]
    dict set date year [dict get $date2 year]
    dict set date month [dict get $date2 month]
    return $date
}

#----------------------------------------------------------------------
#
# AssignBaseWeek --
#
#	Determines the base year and week in the ISO8601 fiscal calendar.
#
# Parameters:
#	date - Dictionary containing the fields of the date that
#	       is to be augmented with the base year and week.
#	baseTime - Base time expressed in seconds from the Posix epoch.
#	changeover - Julian Day on which the Gregorian calendar was adopted
#		     in the target locale.
#

# Results:
#	Returns the given date with "iso8601Year" set to the
#	base year and "iso8601Week" to the week number.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

    # Save original format as long as possible, because of internal
proc ::tcl::clock::AssignBaseWeek {date baseTime timeZone changeover} {
    variable TZData

    # representation (performance).
    # Find the Julian Day Number corresponding to the base time

    # Note that in this case such format will be never localized (also
    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]

    # using another locales). To prevent this return a duplicate (but
    # Calculate the ISO8601 date and transfer the year

    # it may be slower).
    dict set date era CE
    dict set date iso8601Year [dict get $date2 iso8601Year]
    dict set date iso8601Week [dict get $date2 iso8601Week]
    return $date
}

    if {$locfmt eq $format} {
#----------------------------------------------------------------------
#
# AssignBaseJulianDay --
#
#	Determines the base day for a time-of-day conversion.
#
# Parameters:
#	date - Dictionary that is to get the base day
#	baseTime - Base time expressed in seconds from the Posix epoch
#	changeover - Julian day on which the Gregorian calendar was
#		     adpoted in the target locale.
#
# Results:
#	Returns the given dictionary augmented with a 'julianDay' field
#	that contains the base day.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

	set locfmt $format
proc ::tcl::clock::AssignBaseJulianDay { date baseTime timeZone changeover } {
    variable TZData

    # Find the Julian Day Number corresponding to the base time

    set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
    dict set date julianDay [dict get $date2 julianDay]

    }
    return $date
}


#----------------------------------------------------------------------
#
# InterpretHMSP --
#
#	Interprets a time in the form "hh:mm:ss am".
#
# Parameters:
#	date -- Dictionary containing "hourAMPM", "minute", "second"
#	        and "amPmIndicator" fields.
#
# Results:
#	Returns the number of seconds from local midnight.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::InterpretHMSP { date } {
    set hr [dict get $date hourAMPM]
    if { $hr == 12 } {
	set hr 0
    }
    if { [dict get $date amPmIndicator] } {
	incr hr 12
    }
    dict set date hour $hr
    return [InterpretHMS $date[set date {}]]
}

#----------------------------------------------------------------------
#
# InterpretHMS --
#
#	Interprets a 24-hour time "hh:mm:ss"
#
# Parameters:
#	date -- Dictionary containing the "hour", "minute" and "second"
#	        fields.
#
# Results:
#	Returns the given dictionary augmented with a "secondOfDay"
#	field containing the number of seconds from local midnight.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::InterpretHMS { date } {
    return [expr {
    return $locfmt
	( [dict get $date hour] * 60
	  + [dict get $date minute] ) * 60
	+ [dict get $date second]
    }]
}

#----------------------------------------------------------------------
#
# GetSystemTimeZone --
#
#	Determines the system time zone, which is the default for the
#	'clock' command if no other zone is supplied.
#
# Parameters:
#	None.
#
# Results:
#	Returns the system time zone.
#
# Side effects:
#	Stores the system time zone in the 'CachedSystemTimeZone'
#	variable, since determining it may be an expensive process.
#	Stores the system time zone in engine configuration, since
#	determining it may be an expensive process.
#
#----------------------------------------------------------------------

proc ::tcl::clock::GetSystemTimeZone {} {
    variable CachedSystemTimeZone
    variable TimeZoneBad

    if {[set result [getenv TCL_TZ]] ne {}} {
	set timezone $result
    } elseif {[set result [getenv TZ]] ne {}} {
	set timezone $result
    } else {
	# Cache the time zone only if it was detected by one of the
	# expensive methods.
	if { [info exists CachedSystemTimeZone] } {
	    set timezone $CachedSystemTimeZone
	} elseif { $::tcl_platform(platform) eq {windows} } {
	# ask engine for the cached timezone:
	set timezone [::tcl::unsupported::clock::configure -system-tz]
	if { $timezone ne "" } {
	    return $timezone
	}
	if { $::tcl_platform(platform) eq {windows} } {
	    set timezone [GuessWindowsTimeZone]
	} elseif { [file exists /etc/localtime]
		   && ![catch {ReadZoneinfoFile \
				   Tcl/Localtime /etc/localtime}] } {
	    set timezone :Tcl/Localtime
	} else {
	    set timezone :localtime
	}
	set CachedSystemTimeZone $timezone
    }
    if { ![dict exists $TimeZoneBad $timezone] } {
	dict set TimeZoneBad $timezone [catch {SetupTimeZone $timezone}]
	catch {set timezone [SetupTimeZone $timezone]}
    }

    if { [dict get $TimeZoneBad $timezone] } {
	return :localtime
    if { [dict exists $TimeZoneBad $timezone] } {
	set timezone :localtime
    } else {
	return $timezone
    }
}


    # tell backend - current system timezone:
#----------------------------------------------------------------------
#
# ConvertLegacyTimeZone --
#
#	Given an alphanumeric time zone identifier and the system time zone,
#	convert the alphanumeric identifier to an unambiguous time zone.
#
# Parameters:
#	tzname - Name of the time zone to convert
#
# Results:
#	Returns a time zone name corresponding to tzname, but in an
#	unambiguous form, generally +hhmm.
#
# This procedure is implemented primarily to allow the parsing of RFC822
# date/time strings.  Processing a time zone name on input is not recommended
# practice, because there is considerable room for ambiguity; for instance, is
# BST Brazilian Standard Time, or British Summer Time?
#
#----------------------------------------------------------------------

    ::tcl::unsupported::clock::configure -system-tz $timezone
proc ::tcl::clock::ConvertLegacyTimeZone { tzname } {
    variable LegacyTimeZone

    set tzname [string tolower $tzname]
    if { ![dict exists $LegacyTimeZone $tzname] } {
	return -code error -errorcode [list CLOCK badTZName $tzname] \
	    "time zone \"$tzname\" not found"
    }
    return [dict get $LegacyTimeZone $tzname]
    return $timezone
}

#----------------------------------------------------------------------
#
# SetupTimeZone --
#
#	Given the name or specification of a time zone, sets up its in-memory
#	data.
#
# Parameters:
#	tzname - Name of a time zone
#
# Results:
#	Unless the time zone is ':localtime', sets the TZData array to contain
#	the lookup table for local<->UTC conversion.  Returns an error if the
#	time zone cannot be parsed.
#
#----------------------------------------------------------------------

proc ::tcl::clock::SetupTimeZone { timezone } {
proc ::tcl::clock::SetupTimeZone { timezone {alias {}} } {
    variable TZData

    if {! [info exists TZData($timezone)] } {

	variable MINWIDE
	if { $timezone eq {:localtime} } {
	    # Nothing to do, we'll convert using the localtime function

	} elseif {
	variable TimeZoneBad
	if { [dict exists $TimeZoneBad $timezone] } {
	    return -code error \
		-errorcode [list CLOCK badTimeZone $timezone] \
		"time zone \"$timezone\" not found"
	}
	variable MINWIDE
	if {
	    [regexp {^([-+])(\d\d)(?::?(\d\d)(?::?(\d\d))?)?} $timezone \
		    -> s hh mm ss]
	} then {
	    # Make a fixed offset

	    ::scan $hh %d hh
	    if { $mm eq {} } {
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+











+






+
+
+





+
+
+
+
+
+
+
+
+
+
+
+

+






-
+
+







	    if {
		[catch {
		    LoadTimeZoneFile [string range $timezone 1 end]
		}] && [catch {
		    LoadZoneinfoFile [string range $timezone 1 end]
		}]
	    } then {
	    	dict set TimeZoneBad $timezone 1
		return -code error \
		    -errorcode [list CLOCK badTimeZone $timezone] \
		    "time zone \"$timezone\" not found"
	    }
	} elseif { ![catch {ParsePosixTimeZone $timezone} tzfields] } {
	    # This looks like a POSIX time zone - try to process it

	    if { [catch {ProcessPosixTimeZone $tzfields} data opts] } {
		if { [lindex [dict get $opts -errorcode] 0] eq {CLOCK} } {
		    dict unset opts -errorinfo
		}
		dict set TimeZoneBad $timezone 1
		return -options $opts $data
	    } else {
		set TZData($timezone) $data
	    }

	} else {

	    variable LegacyTimeZone

	    # We couldn't parse this as a POSIX time zone.  Try again with a
	    # time zone file - this time without a colon

	    if { [catch { LoadTimeZoneFile $timezone }]
		 && [catch { LoadZoneinfoFile $timezone } - opts] } {

		# Check may be a legacy zone:

		if { $alias eq {} && ![catch {
		    set tzname [dict get $LegacyTimeZone [string tolower $timezone]]
		}] } {
		    set tzname [::tcl::clock::SetupTimeZone $tzname $timezone]
		    set TZData($timezone) $TZData($tzname)
		    # tell backend - timezone is initialized and return shared timezone object:
		    return [::tcl::unsupported::clock::configure -setup-tz $timezone]
		}

		dict unset opts -errorinfo
		dict set TimeZoneBad $timezone 1
		return -options $opts "time zone $timezone not found"
	    }
	    set TZData($timezone) $TZData(:$timezone)
	}
    }

    return
    # tell backend - timezone is initialized and return shared timezone object:
    ::tcl::unsupported::clock::configure -setup-tz $timezone
}

#----------------------------------------------------------------------
#
# GuessWindowsTimeZone --
#
#	Determines the system time zone on windows.
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-


-
+







# zone that uses the same rules.  If it finds one, it returns it; otherwise,
# it constructs a Posix-style time zone string and returns that.
#
#----------------------------------------------------------------------

proc ::tcl::clock::GuessWindowsTimeZone {} {
    variable WinZoneInfo
    variable NoRegistry
    variable TimeZoneBad

    if { [info exists NoRegistry] } {
    if { ![_hasRegistry] } {
	return :localtime
    }

    # Dredge time zone information out of the registry

    if { [catch {
	set rpath HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\TimeZoneInformation
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-
+




-
+







    # Make up a Posix time zone specifier if we can't find one.  Check here
    # that the tzdata file exists, in case we're running in an environment
    # (e.g. starpack) where tzdata is incomplete.  (Bug 1237907)

    if { [dict exists $WinZoneInfo $data] } {
	set tzname [dict get $WinZoneInfo $data]
	if { ! [dict exists $TimeZoneBad $tzname] } {
	    dict set TimeZoneBad $tzname [catch {SetupTimeZone $tzname}]
	    catch {set tzname [SetupTimeZone $tzname]}
	}
    } else {
	set tzname {}
    }
    if { $tzname eq {} || [dict get $TimeZoneBad $tzname] } {
    if { $tzname eq {} || [dict exists $TimeZoneBad $tzname] } {
	lassign $data \
	    bias stdBias dstBias \
	    stdYear stdMonth stdDayOfWeek stdDayOfMonth \
	    stdHour stdMinute stdSecond stdMillisec \
	    dstYear dstMonth dstDayOfWeek dstDayOfMonth \
	    dstHour dstMinute dstSecond dstMillisec
	set stdDelta [expr { $bias + $stdBias }]
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-
+






-
+








proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {

    variable FEB_28

    # Determine the start or end day of DST

    set date [dict create era CE year $y]
    set date [dict create era CE year $y gregorian 1]
    set doy [dict get $z ${bound}DayOfYear]
    if { $doy ne {} } {

	# Time was specified as a day of the year

	if { [dict get $z ${bound}J] ne {}
	     && [IsGregorianLeapYear $y]
	     && [IsGregorianLeapYear $date]
	     && ( $doy > $FEB_28 ) } {
	    incr doy
	}
	dict set date dayOfYear $doy
	set date [GetJulianDayFromEraYearDay $date[set date {}] 2361222]
    } else {
	# Time was specified as a day of the week within a month
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-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-







    } else {
	set s [lindex [::scan $s %d] 0]
    }
    set tod [expr { ( $h * 60 + $m ) * 60 + $s }]
    return [expr { $seconds + $tod }]
}

#----------------------------------------------------------------------
#
# GetLocaleEra --
#
#	Given local time expressed in seconds from the Posix epoch,
#	determine localized era and year within the era.
#
# Parameters:
#	date - Dictionary that must contain the keys, 'localSeconds',
#	       whose value is expressed as the appropriate local time;
#	       and 'year', whose value is the Gregorian year.
#	etable - Value of the LOCALE_ERAS key in the message catalogue
#	         for the target locale.
#
# Results:
#	Returns the dictionary, augmented with the keys, 'localeEra' and
#	'localeYear'.
#
#----------------------------------------------------------------------

proc ::tcl::clock::GetLocaleEra { date etable } {
    set index [BSearch $etable [dict get $date localSeconds]]
    if { $index < 0} {
	dict set date localeEra \
	    [::format %02d [expr { [dict get $date year] / 100 }]]
	dict set date localeYear [expr {
	    [dict get $date year] % 100
	}]
    } else {
	dict set date localeEra [lindex $etable $index 1]
	dict set date localeYear [expr {
	    [dict get $date year] - [lindex $etable $index 2]
	}]
    }
    return $date
}

#----------------------------------------------------------------------
#
# GetJulianDayFromEraYearDay --
#
#	Given a year, month and day on the Gregorian calendar, determines
#	the Julian Day Number beginning at noon on that date.
#
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proc ::tcl::clock::WeekdayOnOrBefore { weekday j } {
    set k [expr { ( $weekday + 6 )  % 7 }]
    return [expr { $j - ( $j - $k ) % 7 }]
}

#----------------------------------------------------------------------
#
# BSearch --
#
#	Service procedure that does binary search in several places inside the
#	'clock' command.
#
# Parameters:
#	list - List of lists, sorted in ascending order by the
#	       first elements
#	key - Value to search for
#
# Results:
#	Returns the index of the greatest element in $list that is less than
#	or equal to $key.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::BSearch { list key } {
    if {[llength $list] == 0} {
	return -1
    }
    if { $key < [lindex $list 0 0] } {
	return -1
    }

    set l 0
    set u [expr { [llength $list] - 1 }]

    while { $l < $u } {
	# At this point, we know that
	#   $k >= [lindex $list $l 0]
	#   Either $u == [llength $list] or else $k < [lindex $list $u+1 0]
	# We find the midpoint of the interval {l,u} rounded UP, compare
	# against it, and set l or u to maintain the invariant.  Note that the
	# interval shrinks at each step, guaranteeing convergence.

	set m [expr { ( $l + $u + 1 ) / 2 }]
	if { $key >= [lindex $list $m 0] } {
	    set l $m
	} else {
	    set u [expr { $m - 1 }]
	}
    }

    return $l
}

#----------------------------------------------------------------------
#
# clock add --
#
#	Adds an offset to a given time.
#
# Syntax:
#	clock add clockval ?count unit?... ?-option value?
#
# Parameters:
#	clockval -- Starting time value
#	count -- Amount of a unit of time to add
#	unit -- Unit of time to add, must be one of:
#			years year months month weeks week
#			days day hours hour minutes minute
#			seconds second
#
# Options:
#	-gmt BOOLEAN
#		(Deprecated) Flag synonymous with '-timezone :GMT'
#	-timezone ZONE
#		Name of the time zone in which calculations are to be done.
#	-locale NAME
#		Name of the locale in which calculations are to be done.
#		Used to determine the Gregorian change date.
#
# Results:
#	Returns the given time adjusted by the given offset(s) in
#	order.
#
# Notes:
#	It is possible that adding a number of months or years will adjust the
#	day of the month as well.  For instance, the time at one month after
#	31 January is either 28 or 29 February, because February has fewer
#	than 31 days.
#
#----------------------------------------------------------------------

proc ::tcl::clock::add { clockval args } {
    if { [llength $args] % 2 != 0 } {
	set cmdName "clock add"
	return -code error \
	    -errorcode [list CLOCK wrongNumArgs] \
	    "wrong \# args: should be\
	     \"$cmdName clockval ?number units?...\
	     ?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?\""
    }
    if { [catch { expr {wide($clockval)} } result] } {
	return -code error $result
    }

    set offsets {}
    set gmt 0
    set locale c
    set timezone [GetSystemTimeZone]

    foreach { a b } $args {
	if { [string is integer -strict $a] } {
	    lappend offsets $a $b
	} else {
	    switch -exact -- $a {
		-g - -gm - -gmt {
		    set saw(-gmt) {}
		    set gmt $b
		}
		-l - -lo - -loc - -loca - -local - -locale {
		    set locale [string tolower $b]
		}
		-t - -ti - -tim - -time - -timez - -timezo - -timezon -
		-timezone {
		    set saw(-timezone) {}
		    set timezone $b
		}
		default {
		    throw [list CLOCK badOption $a] \
			"bad option \"$a\":\
			 must be -gmt, -locale or -timezone"
		}
	    }
	}
    }

    # Check options for validity

    if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
	return -code error \
	    -errorcode [list CLOCK gmtWithTimezone] \
	    "cannot use -gmt and -timezone in same call"
    }
    if { [catch { expr { wide($clockval) } } result] } {
	return -code error "expected integer but got \"$clockval\""
    }
    if { ![string is boolean -strict $gmt] } {
	return -code error "expected boolean value but got \"$gmt\""
    } elseif { $gmt } {
	set timezone :GMT
    }

    EnterLocale $locale

    set changeover [mc GREGORIAN_CHANGE_DATE]

    if {[catch {SetupTimeZone $timezone} retval opts]} {
	dict unset opts -errorinfo
	return -options $opts $retval
    }

    try {
	foreach { quantity unit } $offsets {
	    switch -exact -- $unit {
		years - year {
		    set clockval [AddMonths [expr { 12 * $quantity }] \
			    $clockval $timezone $changeover]
		}
		months - month {
		    set clockval [AddMonths $quantity $clockval $timezone \
			    $changeover]
		}

		weeks - week {
		    set clockval [AddDays [expr { 7 * $quantity }] \
			    $clockval $timezone $changeover]
		}
		days - day {
		    set clockval [AddDays $quantity $clockval $timezone \
			    $changeover]
		}

		hours - hour {
		    set clockval [expr { 3600 * $quantity + $clockval }]
		}
		minutes - minute {
		    set clockval [expr { 60 * $quantity + $clockval }]
		}
		seconds - second {
		    set clockval [expr { $quantity + $clockval }]
		}

		default {
		    throw [list CLOCK badUnit $unit] \
			"unknown unit \"$unit\", must be \
			years, months, weeks, days, hours, minutes or seconds"
		}
	    }
	}
	return $clockval
    } trap CLOCK {result opts} {
	# Conceal the innards of [clock] when it's an expected error
	dict unset opts -errorinfo
	return -options $opts $result
    }
}

#----------------------------------------------------------------------
#
# AddMonths --
#
#	Add a given number of months to a given clock value in a given
#	time zone.
#
# Parameters:
#	months - Number of months to add (may be negative)
#	clockval - Seconds since the epoch before the operation
#	timezone - Time zone in which the operation is to be performed
#
# Results:
#	Returns the new clock value as a number of seconds since
#	the epoch.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
    variable DaysInRomanMonthInCommonYear
    variable DaysInRomanMonthInLeapYear
    variable TZData

    # Convert the time to year, month, day, and fraction of day.

    set date [GetDateFields $clockval $TZData($timezone) $changeover]
    dict set date secondOfDay [expr {
	[dict get $date localSeconds] % 86400
    }]
    dict set date tzName $timezone

    # Add the requisite number of months

    set m [dict get $date month]
    incr m $months
    incr m -1
    set delta [expr { $m / 12 }]
    set mm [expr { $m % 12 }]
    dict set date month [expr { $mm + 1 }]
    dict incr date year $delta

    # If the date doesn't exist in the current month, repair it

    if { [IsGregorianLeapYear $date] } {
	set hath [lindex $DaysInRomanMonthInLeapYear $mm]
    } else {
	set hath [lindex $DaysInRomanMonthInCommonYear $mm]
    }
    if { [dict get $date dayOfMonth] > $hath } {
	dict set date dayOfMonth $hath
    }

    # Reconvert to a number of seconds

    set date [GetJulianDayFromEraYearMonthDay \
		  $date[set date {}]\
		  $changeover]
    dict set date localSeconds [expr {
	-210866803200
	+ ( 86400 * wide([dict get $date julianDay]) )
	+ [dict get $date secondOfDay]
    }]
    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
		 $changeover]

    return [dict get $date seconds]

}

#----------------------------------------------------------------------
#
# AddDays --
#
#	Add a given number of days to a given clock value in a given time
#	zone.
#
# Parameters:
#	days - Number of days to add (may be negative)
#	clockval - Seconds since the epoch before the operation
#	timezone - Time zone in which the operation is to be performed
#	changeover - Julian Day on which the Gregorian calendar was adopted
#		     in the target locale.
#
# Results:
#	Returns the new clock value as a number of seconds since the epoch.
#
# Side effects:
#	None.
#
#----------------------------------------------------------------------

proc ::tcl::clock::AddDays { days clockval timezone changeover } {
    variable TZData

    # Convert the time to Julian Day

    set date [GetDateFields $clockval $TZData($timezone) $changeover]
    dict set date secondOfDay [expr {
	[dict get $date localSeconds] % 86400
    }]
    dict set date tzName $timezone

    # Add the requisite number of days

    dict incr date julianDay $days

    # Reconvert to a number of seconds

    dict set date localSeconds [expr {
	-210866803200
	+ ( 86400 * wide([dict get $date julianDay]) )
	+ [dict get $date secondOfDay]
    }]
    set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
		  $changeover]

    return [dict get $date seconds]

}

#----------------------------------------------------------------------
#
# ChangeCurrentLocale --
#
#        The global locale was changed within msgcat.
#        Clears the buffered parse functions of the current locale.
#
# Parameters:
#        loclist (ignored)
#
# Results:
#        None.
#
# Side effects:
#        Buffered parse functions are cleared.
#
#----------------------------------------------------------------------

proc ::tcl::clock::ChangeCurrentLocale {args} {
    variable FormatProc
    variable LocaleNumeralCache
    variable CachedSystemTimeZone
    variable TimeZoneBad

    ::tcl::unsupported::clock::configure -current-locale [lindex $args 0]
    foreach p [info procs [namespace current]::scanproc'*'current] {
	rename $p {}
    }
    foreach p [info procs [namespace current]::formatproc'*'current] {
	rename $p {}
    }

    catch {array unset FormatProc *'current}
    set LocaleNumeralCache {}
}

#----------------------------------------------------------------------
#
# ClearCaches --
#
#	Clears all caches to reclaim the memory used in [clock]
#
# Parameters:
#	None.
#
# Results:
#	None.
#
# Side effects:
#	Caches are cleared.
#
#----------------------------------------------------------------------

proc ::tcl::clock::ClearCaches {} {
    variable FormatProc
    variable LocaleNumeralCache
    variable CachedSystemTimeZone
    variable LocFmtMap
    variable mcMergedCat
    variable TimeZoneBad

    # tell backend - should invalidate:
    foreach p [info procs [namespace current]::scanproc'*] {
    ::tcl::unsupported::clock::configure -clear
	rename $p {}
    }

    foreach p [info procs [namespace current]::formatproc'*] {
	rename $p {}
    }
    # clear msgcat cache:
    set mcMergedCat [dict create]


    catch {unset FormatProc}
    set LocaleNumeralCache {}
    set LocFmtMap {}
    catch {unset CachedSystemTimeZone}
    set TimeZoneBad {}
    InitTZData
}

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		{::tcl::MacOSXPkgUnknown ::tclPkgUnknown}}
    } else {
	package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
    }

    # Set up the 'clock' ensemble

    namespace eval ::tcl::clock [list variable TclLibDir $::tcl_library]

    proc clock args {
    proc ::tcl::initClock {} {
	# Auto-loading stubs for 'clock.tcl'

	foreach cmd {add format scan} {
	    proc ::tcl::clock::$cmd args {
	set cmdmap [dict create]
	foreach cmd {add clicks format microseconds milliseconds scan seconds} {
	    dict set cmdmap $cmd ::tcl::clock::$cmd
		variable TclLibDir
		source [file join $TclLibDir clock.tcl]
		return [uplevel 1 [info level 0]]
	    }
	}
	}

	rename ::tcl::initClock {}
	namespace inscope ::tcl::clock [list namespace ensemble create -command \
	    [uplevel 1 [list ::namespace origin [::lindex [info level 0] 0]]] \
	    -map $cmdmap]
	::tcl::unsupported::clock::configure -init-complete
	uplevel 1 [info level 0]
    }
    ::tcl::initClock
}

# Conditionalize for presence of exec.

if {[namespace which -command exec] eq ""} {

    # Some machines do not have exec. Also, on all

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set auto_index(::auto_mkindex_parser::mkindex) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::hook) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::childhook) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::command) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::commandInit) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::fullname) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::auto_mkindex_parser::indexEntry) [list ::tcl::Pkg::source [file join $dir auto.tcl]]
set auto_index(::tcl::clock::Initialize) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::mcget) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::mcMerge) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::GetSystemLocale) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::EnterLocale) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::_hasRegistry) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::LoadWindowsDateTimeFormats) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::LocalizeFormat) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::GetSystemTimeZone) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::SetupTimeZone) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::GuessWindowsTimeZone) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::LoadTimeZoneFile) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::LoadZoneinfoFile) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::ReadZoneinfoFile) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::ParsePosixTimeZone) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::ProcessPosixTimeZone) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::DeterminePosixDSTTime) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::GetJulianDayFromEraYearDay) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::GetJulianDayFromEraYearMonthWeekDay) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::IsGregorianLeapYear) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::WeekdayOnOrBefore) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::ChangeCurrentLocale) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(::tcl::clock::ClearCaches) [list ::tcl::Pkg::source [file join $dir clock.tcl]]
set auto_index(foreachLine) [list ::tcl::Pkg::source [file join $dir foreachline.tcl]]
set auto_index(::tcl::history) [list ::tcl::Pkg::source [file join $dir history.tcl]]
set auto_index(history) [list ::tcl::Pkg::source [file join $dir history.tcl]]
set auto_index(::tcl::HistAdd) [list ::tcl::Pkg::source [file join $dir history.tcl]]
set auto_index(::tcl::HistKeep) [list ::tcl::Pkg::source [file join $dir history.tcl]]
set auto_index(::tcl::HistClear) [list ::tcl::Pkg::source [file join $dir history.tcl]]
set auto_index(::tcl::HistInfo) [list ::tcl::Pkg::source [file join $dir history.tcl]]

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proc test-other {{reptime 1000}} {
  _test_run $reptime {
    # Bad zone
    {catch {clock scan "1 day" -timezone BAD_ZONE -locale en}}

    # Scan : julian day (overflow)
    {catch {clock scan 5373485 -format %J}}

    setup {set _(org-reptime) $_(reptime); lset _(reptime) 1 50}

    # Scan : test rotate of GC objects (format is dynamic, so tcl-obj removed with last reference)
    setup {set i -1}
    {set i 0; time { clock scan "[incr i] - 25.11.2015" -format "$i - %d.%m.%Y" -base 0 -gmt 1 } 50}
    {clock scan "[incr i] - 25.11.2015" -format "$i - %d.%m.%Y" -base 0 -gmt 1}
    # Scan : test reusability of GC objects (format is dynamic, so tcl-obj removed with last reference)
    setup {incr i; set j $i}
    {set i 50; time { clock scan "[incr i -1] - 25.11.2015" -format "$i - %d.%m.%Y" -base 0 -gmt 1 } 50}
    {clock scan "[incr j -1] - 25.11.2015" -format "$j - %d.%m.%Y" -base 0 -gmt 1}
    setup {set _(reptime) $_(org-reptime); set j $i}
    {clock scan "[incr j -1] - 25.11.2015" -format "$j - %d.%m.%Y" -base 0 -gmt 1; if {!$j} {set j $i}}
  }
}

proc test-ensemble-perf {{reptime 1000}} {
  _test_run $reptime {
    # Clock clicks (ensemble)
    {clock clicks}

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# clock-ivm.test --
#
# This test file covers the 'clock' command using inverted validity mode.
#
# See the file "clock.test" for more information.

::tcl::unsupported::clock::configure -valid [expr {![::tcl::unsupported::clock::configure -valid]}]
source [file join [file dirname [info script]] clock.test]

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# clock.test --
#
#	This test file covers the 'clock' command that manipulates time.
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands. Sourcing this file into Tcl runs the tests and
# generates output for errors.  No output means no errors were found.
#
# Copyright © 2004 Kevin B. Kenny.  All rights reserved.
# Copyright © 2015 Sergey G. Brester aka sebres.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

if {"::tcltest" ni [namespace children]} {
    package require tcltest 2.5
    namespace import -force ::tcltest::*
}

if {[testConstraint win]} {
    if {[catch {
	    ::tcltest::loadTestedCommands
	    package require registry
	}]} {
	namespace eval ::tcl::clock {variable NoRegistry {}}
	# nothing to be done (registry loaded on demand)
    }
}

package require msgcat 1.4

testConstraint detroit \
    [expr {![catch {clock format 0 -timezone :America/Detroit -format %z}]}]
testConstraint y2038 \
    [expr {[clock format 2158894800 -format %z -timezone :America/Detroit] eq {-0400}}]

# Test with both validity modes - validate on / off:

set valid_mode [::tcl::unsupported::clock::configure -valid]

# Wrapper to show validity mode in the test-case name (for possible errors):
proc test {args} {
  variable valid_mode
  lset args 0 [lindex $args 0].vm:$valid_mode
  tailcall ::tcltest::test {*}$args
}

puts [outputChannel] "  Validity default mode: [expr {$valid_mode ? "on": "off"}]"
testConstraint valid_off [expr {![::tcl::unsupported::clock::configure -valid]}]

if {[namespace which -command ::tcl::unsupported::timerate] ne ""} {
    namespace import ::tcl::unsupported::timerate
}

# TEST PLAN

# clock-0:
#	several base test-cases
#
# clock-1:
#	[clock format] - tests of bad and empty arguments
#
# clock-2
#	formatting of year, month and day of month
#
# clock-3
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    }
    if { ![dict exists $reg $path $key] } {
	return -code error "test case attempts to read unknown registry entry $path $key"
    }
    return [dict get $reg $path $key]
}

# Base test cases:

test clock-0.1 "initial: auto-loading of ensemble and stubs on demand" -setup {
    set i [interp create]; # because clock can be used somewhere, test it in new interp:
} -body {
    $i eval {
	lappend ret ens:[namespace ensemble exists ::clock]
	clock seconds; # init ensemble (but not yet stubs, loading of clock.tcl retarded)
	lappend ret ens:[namespace ensemble exists ::clock]
	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
	clock format -now; # clock.tcl stubs expected
	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
    }
} -cleanup {
    interp delete $i
} -result {ens:0 ens:1 stubs:0 stubs:1}
test clock-0.1a "initial: safe interpreter shares clock command with parent" -setup {
    set i [interp create]
    $i eval {set sci [interp create -safe]}
} -body {
    $i eval {
	lappend ret ens:[namespace ensemble exists ::clock]
	$sci eval { clock seconds }; # init ensemble (but not yet stubs, loading of clock.tcl retarded)
	lappend ret ens:[namespace ensemble exists ::clock]
	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
	$sci eval { clock format -now }; # clock.tcl stubs expected
	lappend ret stubs:[expr {[namespace which -command ::tcl::clock::GetSystemTimeZone] ne ""}]
    }
} -cleanup {
    interp delete $i
} -result {ens:0 ens