Tcl Source Code

(see below) unless quoted.
.IP "[2] \fBEvaluation.\fR"
A command is evaluated in two steps.
First, the Tcl interpreter breaks the command into \fIwords\fR
and performs substitutions as described below.
These substitutions are performed in the same way for all
commands.
Secondly, the first word is used to locate a command procedure to
carry out the command, then all of the words of the command are
passed to the command procedure.
The command procedure is free to interpret each of its words
in any way it likes, such as an integer, variable name, list,
or Tcl script.
Different commands interpret their words differently.
.IP "[3] \fBWords.\fR"
Words of a command are separated by white space (except for
newlines, which are command separators).
.IP "[4] \fBDouble quotes.\fR"

(see below) unless quoted.
.IP "[2] \fBEvaluation.\fR"
A command is evaluated in two steps.
First, the Tcl interpreter breaks the command into \fIwords\fR
and performs substitutions as described below.
These substitutions are performed in the same way for all
commands.
Secondly, the first word is used to locate a routine to
carry out the command, and the remaining words of the command are
passed to that routine.
The routine is free to interpret each of its words
in any way it likes, such as an integer, variable name, list,
or Tcl script.
Different commands interpret their words differently.
.IP "[3] \fBWords.\fR"
Words of a command are separated by white space (except for
newlines, which are command separators).
.IP "[4] \fBDouble quotes.\fR"

.AP int index in
The index of a character (not byte) in the UTF-8 string.
.AP int *readPtr out
If non-NULL, filled with the number of bytes in the backslash sequence,
including the backslash character.
.AP char *dst out
Buffer in which the bytes represented by the backslash sequence are stored.
At most \fBTCL_UTF_MAX\fR bytes are stored in the buffer.
.AP int nocase in
Specifies whether the match should be done case-sensitive (0) or
case-insensitive (1).
.BE

.SH DESCRIPTION
.PP
................................................................................
source buffer is long enough such that this routine does not run off the
end and dereference non-existent or random memory; if the source buffer
is known to be null-terminated, this will not happen.  If the input is
a byte in the range 0x80 - 0x9F, \fBTcl_UtfToUniChar\fR assumes the
cp1252 encoding, stores the corresponding Tcl_UniChar in \fI*chPtr\fR
and returns 1. If the input is otherwise
not in proper UTF-8 format, \fBTcl_UtfToUniChar\fR will store the first
byte of \fIsrc\fR in \fI*chPtr\fR as a Tcl_UniChar between 0x0000 and
0x00ff and return 1.
.PP
\fBTcl_UniCharToUtfDString\fR converts the given Unicode string
to UTF-8, storing the result in a previously initialized \fBTcl_DString\fR.
You must specify \fIuniLength\fR, the length of the given Unicode string.
The return value is a pointer to the UTF-8 representation of the
Unicode string.  Storage for the return value is appended to the
end of the \fBTcl_DString\fR.
................................................................................
contain at least \fIindex\fR characters.  This is equivalent to calling
\fBTcl_UtfNext\fR \fIindex\fR times.  If a negative \fIindex\fR is given,
the return pointer points to the first character in the source string.
.PP
\fBTcl_UtfBackslash\fR is a utility procedure used by several of the Tcl
commands.  It parses a backslash sequence and stores the properly formed
UTF-8 character represented by the backslash sequence in the output
buffer \fIdst\fR.  At most \fBTCL_UTF_MAX\fR bytes are stored in the buffer.
\fBTcl_UtfBackslash\fR modifies \fI*readPtr\fR to contain the number
of bytes in the backslash sequence, including the backslash character.
The return value is the number of bytes stored in the output buffer.
.PP
See the \fBTcl\fR manual entry for information on the valid backslash
sequences.  All of the sequences described in the Tcl manual entry are
supported by \fBTcl_UtfBackslash\fR.

.SH KEYWORDS
utf, unicode, backslash

.AP int index in
The index of a character (not byte) in the UTF-8 string.
.AP int *readPtr out
If non-NULL, filled with the number of bytes in the backslash sequence,
including the backslash character.
.AP char *dst out
Buffer in which the bytes represented by the backslash sequence are stored.
At most 4 bytes are stored in the buffer.
.AP int nocase in
Specifies whether the match should be done case-sensitive (0) or
case-insensitive (1).
.BE

.SH DESCRIPTION
.PP
................................................................................
source buffer is long enough such that this routine does not run off the
end and dereference non-existent or random memory; if the source buffer
is known to be null-terminated, this will not happen.  If the input is
a byte in the range 0x80 - 0x9F, \fBTcl_UtfToUniChar\fR assumes the
cp1252 encoding, stores the corresponding Tcl_UniChar in \fI*chPtr\fR
and returns 1. If the input is otherwise
not in proper UTF-8 format, \fBTcl_UtfToUniChar\fR will store the first
byte of \fIsrc\fR in \fI*chPtr\fR as a Tcl_UniChar between 0x00A0 and
0x00FF and return 1.
.PP
\fBTcl_UniCharToUtfDString\fR converts the given Unicode string
to UTF-8, storing the result in a previously initialized \fBTcl_DString\fR.
You must specify \fIuniLength\fR, the length of the given Unicode string.
The return value is a pointer to the UTF-8 representation of the
Unicode string.  Storage for the return value is appended to the
end of the \fBTcl_DString\fR.
................................................................................
contain at least \fIindex\fR characters.  This is equivalent to calling
\fBTcl_UtfNext\fR \fIindex\fR times.  If a negative \fIindex\fR is given,
the return pointer points to the first character in the source string.
.PP
\fBTcl_UtfBackslash\fR is a utility procedure used by several of the Tcl
commands.  It parses a backslash sequence and stores the properly formed
UTF-8 character represented by the backslash sequence in the output
buffer \fIdst\fR.  At most 4 bytes are stored in the buffer.
\fBTcl_UtfBackslash\fR modifies \fI*readPtr\fR to contain the number
of bytes in the backslash sequence, including the backslash character.
The return value is the number of bytes stored in the output buffer.
.PP
See the \fBTcl\fR manual entry for information on the valid backslash
sequences.  All of the sequences described in the Tcl manual entry are
supported by \fBTcl_UtfBackslash\fR.

.SH KEYWORDS
utf, unicode, backslash

\fBarray nextelement\fR will not indicate whether the search
has been completed.
.TP
\fBarray default \fIsubcommand arrayName args...\fR
.VS TIP508
Manages the default value of the array. Arrays initially have no default
value, but this command allows you to set one; the default value will be
returned when reading from an element of the array \farrayName\fR if the read
would otherwise result in an error. Note that this may cause the \fBappend\fR,
\fBdict\fR, \fBincr\fR and \fBlappend\fR commands to change their behavior in
relation to non-existing array elements.
.RS
.PP
The \fIsubcommand\fR argument controls what exact operation will be performed
on the default value of \fIarrayName\fR. Supported \fIsubcommand\fRs are:

\fBarray nextelement\fR will not indicate whether the search
has been completed.
.TP
\fBarray default \fIsubcommand arrayName args...\fR
.VS TIP508
Manages the default value of the array. Arrays initially have no default
value, but this command allows you to set one; the default value will be
returned when reading from an element of the array \fIarrayName\fR if the read
would otherwise result in an error. Note that this may cause the \fBappend\fR,
\fBdict\fR, \fBincr\fR and \fBlappend\fR commands to change their behavior in
relation to non-existing array elements.
.RS
.PP
The \fIsubcommand\fR argument controls what exact operation will be performed
on the default value of \fIarrayName\fR. Supported \fIsubcommand\fRs are:

\fB\-vacuumtrigger \fIdeletionCount\fR
.
A count of the number of persistent cookie deletions to go between vacuuming
the database.
.RE
.PP
Cookie jar instances may be made with any of the standard TclOO instance
creation methods (\fBcreate\fR or \fRnew\fR).
.TP
\fB::http::cookiejar new\fR ?\fIfilename\fR?
.
If a \fIfilename\fR argument is provided, it is the name of a file containing
an SQLite database that will contain the persistent cookies maintained by the
cookie jar; the database will be created if the file does not already
exist. If \fIfilename\fR is not supplied, the database will be held entirely within

\fB\-vacuumtrigger \fIdeletionCount\fR
.
A count of the number of persistent cookie deletions to go between vacuuming
the database.
.RE
.PP
Cookie jar instances may be made with any of the standard TclOO instance
creation methods (\fBcreate\fR or \fBnew\fR).
.TP
\fB::http::cookiejar new\fR ?\fIfilename\fR?
.
If a \fIfilename\fR argument is provided, it is the name of a file containing
an SQLite database that will contain the persistent cookies maintained by the
cookie jar; the database will be created if the file does not already
exist. If \fIfilename\fR is not supplied, the database will be held entirely within

This creates a class method, or (if \fIargList\fR and \fIbodyScript\fR are
omitted) promotes an existing method on the class object to be a class
method. The \fIname\fR, \fIargList\fR and \fIbodyScript\fR arguments are as in
the \fBmethod\fR definition, below.
.RS
.PP
Class methods can be called on either the class itself or on the instances of
that class. When they are called, the current object (see the \fBself\R and
\fBmy\fR commands) is the class on which they are called or the class of the
instance on which they are called, depending on whether they are called on the
class or an instance of the class, respectively. If called on a subclass or
instance of the subclass, the current object is the subclass.
.PP
In a private definition context, the methods as invoked on classes are
\fInot\fR private, but the methods as invoked on instances of classes are

This creates a class method, or (if \fIargList\fR and \fIbodyScript\fR are
omitted) promotes an existing method on the class object to be a class
method. The \fIname\fR, \fIargList\fR and \fIbodyScript\fR arguments are as in
the \fBmethod\fR definition, below.
.RS
.PP
Class methods can be called on either the class itself or on the instances of
that class. When they are called, the current object (see the \fBsel\fR and
\fBmy\fR commands) is the class on which they are called or the class of the
instance on which they are called, depending on whether they are called on the
class or an instance of the class, respectively. If called on a subclass or
instance of the subclass, the current object is the subclass.
.PP
In a private definition context, the methods as invoked on classes are
\fInot\fR private, but the methods as invoked on instances of classes are

'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH info n 8.4 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
info \- Return information about the state of the Tcl interpreter
.SH SYNOPSIS
\fBinfo \fIoption \fR?\fIarg arg ...\fR?
.BE
.SH DESCRIPTION
.PP
This command provides information about various internals of the Tcl
interpreter.
The legal \fIoption\fRs (which may be abbreviated) are:
.TP
\fBinfo args \fIprocname\fR
.
Returns a list containing the names of the arguments to procedure
\fIprocname\fR, in order.  \fIProcname\fR must be the name of a
Tcl command procedure.
.TP
\fBinfo body \fIprocname\fR
.
Returns the body of procedure \fIprocname\fR.  \fIProcname\fR must be
the name of a Tcl command procedure.
.TP
\fBinfo class\fI subcommand class\fR ?\fIarg ...\fR
.
Returns information about the class, \fIclass\fR. The \fIsubcommand\fRs are
described in \fBCLASS INTROSPECTION\fR below.
.TP
\fBinfo cmdcount\fR
.
Returns a count of the total number of commands that have been invoked
in this interpreter.
.TP
\fBinfo cmdtype \fIcommandName\fR
.VS TIP426
Returns a description of the kind of command named by \fIcommandName\fR.  The
supported types are:
.RS
.IP \fBalias\fR
Indicates that \fIcommandName\fR was created by \fBinterp alias\fR. Note that
safe interpreters can only see a subset of aliases (specifically those between
two commands within themselves).
.IP \fBcoroutine\fR
Indicates that \fIcommandName\fR was created by \fBcoroutine\fR.
.IP \fBensemble\fR
Indicates that \fIcommandName\fR was created by \fBnamespace ensemble\fR.
.IP \fBimport\fR
Indicates that \fIcommandName\fR was created by \fBnamespace import\fR.
.IP \fBnative\fR
Indicates that \fIcommandName\fR was created by the \fBTcl_CreateObjProc\fR
interface directly without further registration of the type of command.
.IP \fBobject\fR
Indicates that \fIcommandName\fR is the public command that represents an
instance of \fBoo::object\fR or one of its subclasses.
.IP \fBprivateObject\fR
Indicates that \fIcommandName\fR is the private command (\fBmy\fR by default)
that represents an instance of \fBoo::object\fR or one of its subclasses.
.IP \fBproc\fR
Indicates that \fIcommandName\fR was created by \fBproc\fR.
.IP \fBslave\fR
Indicates that \fIcommandName\fR was created by \fBinterp create\fR.
.IP \fBzlibStream\fR
Indicates that \fIcommandName\fR was created by \fBzlib stream\fR.
.PP
There may be other registered types as well; this is a set that is extensible
at the implementation level with \fBTcl_RegisterCommandTypeName\fR.
.RE
.VE TIP426
.TP
\fBinfo commands \fR?\fIpattern\fR?
.
If \fIpattern\fR is not specified,
returns a list of names of all the Tcl commands visible
(i.e. executable without using a qualified name) to the current namespace,
including both the built-in commands written in C and
the command procedures defined using the \fBproc\fR command.
If \fIpattern\fR is specified,
only those names matching \fIpattern\fR are returned.
Matching is determined using the same rules as for \fBstring match\fR.
\fIpattern\fR can be a qualified name like \fBFoo::print*\fR.
That is, it may specify a particular namespace
using a sequence of namespace names separated by double colons (\fB::\fR),
and may have pattern matching special characters
at the end to specify a set of commands in that namespace.
If \fIpattern\fR is a qualified name,
the resulting list of command names has each one qualified with the name
of the specified namespace, and only the commands defined in the named
namespace are returned.
.\" Technically, most of this hasn't changed; that's mostly just the
.\" way it always worked. Hardly anyone knew that though.


.TP
\fBinfo complete \fIcommand\fR
.
Returns 1 if \fIcommand\fR is a complete Tcl command in the sense of
having no unclosed quotes, braces, brackets or array element names.
If the command does not appear to be complete then 0 is returned.
This command is typically used in line-oriented input environments
to allow users to type in commands that span multiple lines;  if the
command is not complete, the script can delay evaluating it until additional
lines have been typed to complete the command.
.TP
\fBinfo coroutine\fR
.
Returns the name of the currently executing \fBcoroutine\fR, or the empty
string if either no coroutine is currently executing, or the current coroutine
has been deleted (but has not yet returned or yielded since deletion).
.TP
\fBinfo default \fIprocname arg varname\fR
.
\fIProcname\fR must be the name of a Tcl command procedure and \fIarg\fR
must be the name of an argument to that procedure.  If \fIarg\fR
does not have a default value then the command returns \fB0\fR.
Otherwise it returns \fB1\fR and places the default value of \fIarg\fR
into variable \fIvarname\fR.
.TP
\fBinfo errorstack \fR?\fIinterp\fR?
.
Returns, in a form that is programmatically easy to parse, the function names
and arguments at each level from the call stack of the last error in the given
\fIinterp\fR, or in the current one if not specified.
.RS
.PP
This form is an even-sized list alternating tokens and parameters. Tokens are
currently either \fBCALL\fR, \fBUP\fR, or \fBINNER\fR, but other values may be
introduced in the future. \fBCALL\fR indicates a procedure call, and its
parameter is the corresponding \fBinfo level\fR \fB0\fR. \fBUP\fR indicates a
shift in variable frames generated by \fBuplevel\fR or similar, and applies to
the previous \fBCALL\fR item. Its parameter is the level offset. \fBINNER\fR
identifies the
.QW "inner context" ,
which is the innermost atomic command or bytecode instruction that raised the
error, along with its arguments when available. While \fBCALL\fR and \fBUP\fR
allow to follow complex call paths, \fBINNER\fR homes in on the offending
operation in the innermost procedure call, even going to sub-expression
granularity.
.PP
This information is also present in the \fB\-errorstack\fR entry of the
options dictionary returned by 3-argument \fBcatch\fR; \fBinfo errorstack\fR
is a convenient way of retrieving it for uncaught errors at top-level in an
interactive \fBtclsh\fR.
.RE
.TP
\fBinfo exists \fIvarName\fR
.
Returns \fB1\fR if the variable named \fIvarName\fR exists in the
current context (either as a global or local variable) and has been
defined by being given a value, returns \fB0\fR otherwise.
.TP
\fBinfo frame\fR ?\fInumber\fR?
.

This command provides access to all frames on the stack, even those
hidden from \fBinfo level\fR. If \fInumber\fR is not specified, this
command returns a number giving the frame level of the command. This
is 1 if the command is invoked at top-level. If \fInumber\fR is
specified, then the result is a dictionary containing the location
information for the command at the \fInumber\fRed level on the stack.
.RS
.PP
If \fInumber\fR is positive (> 0) then it selects a particular stack
level (1 refers to the outer-most active command, 2 to the command it
called, and so on, up to the current frame level which refers to
\fBinfo frame\fR itself); otherwise it gives a level relative to the
current command (0 refers to the current command, i.e., \fBinfo
frame\fR itself, -1 to its caller, and so on).


.PP
This is similar to how \fBinfo level\fR works, except that this
subcommand reports all frames, like \fBsource\fRd scripts,
\fBeval\fRs, \fBuplevel\fRs, etc.
.PP
Note that for nested commands, like

.QW "foo [bar [x]]" ,
only
.QW x
will be seen by an \fBinfo frame\fR invoked within
.QW x .
This is the same as for \fBinfo level\fR and error stack traces.
.PP
The result dictionary may contain the keys listed below, with the
specified meanings for their values:
.TP
\fBtype\fR
.
This entry is always present and describes the nature of the location
for the command. The recognized values are \fBsource\fR, \fBproc\fR,
\fBeval\fR, and \fBprecompiled\fR.
.RS
.TP
\fBsource\fR\0\0\0\0\0\0\0\0
.
means that the command is found in a script loaded by the \fBsource\fR
command.
.TP
\fBproc\fR\0\0\0\0\0\0\0\0
.
means that the command is found in dynamically created procedure body.

.TP
\fBeval\fR\0\0\0\0\0\0\0\0
.
means that the command is executed by \fBeval\fR or \fBuplevel\fR.
.TP
\fBprecompiled\fR\0\0\0\0\0\0\0\0
.
means that the command is found in a pre-compiled script (loadable by
the package \fBtbcload\fR), and no further information will be
available.
.RE
.TP
\fBline\fR
.
This entry provides the number of the line the command is at inside of
the script it is a part of. This information is not present for type
\fBprecompiled\fR. For type \fBsource\fR this information is counted
relative to the beginning of the file, whereas for the last two types
the line is counted relative to the start of the script.
.TP
\fBfile\fR
.
This entry is present only for type \fBsource\fR. It provides the
normalized path of the file the command is in.
.TP
\fBcmd\fR
.
This entry provides the string representation of the command. This is
usually the unsubstituted form, however for commands which are a
canonically-constructed list (e.g., as produced by the \fBlist\fR command)
executed by \fBeval\fR it is the substituted form as they have no other
string representation. Care is taken that the canonicality property of
the latter is not spoiled.
.TP
\fBproc\fR
.
This entry is present only if the command is found in the body of a
regular Tcl procedure. It then provides the name of that procedure.
.TP
\fBlambda\fR
.
This entry is present only if the command is found in the body of an
anonymous Tcl procedure, i.e. a lambda. It then provides the entire
definition of the lambda in question.
.TP
\fBlevel\fR
.
This entry is present only if the queried frame has a corresponding
frame returned by \fBinfo level\fR. It provides the index of this
frame, relative to the current level (0 and negative numbers).
.PP
A thing of note is that for procedures statically defined in files the
locations of commands in their bodies will be reported with type
\fBsource\fR and absolute line numbers, and not as type
\fBproc\fR. The same is true for procedures nested in statically
defined procedures, and literal eval scripts in files or statically
defined procedures.
.PP
In contrast, procedure definitions and \fBeval\fR within a dynamically
\fBeval\fRuated environment count line numbers relative to the start of
their script, even if they would be able to count relative to the
start of the outer dynamic script. That type of number usually makes
more sense.
.PP
A different way of describing this behaviour is that file based
locations are tracked as deeply as possible, and where this is not
possible the lines are counted based on the smallest possible
\fBeval\fR or procedure body, as that scope is usually easier to find
than any dynamic outer scope.
.PP
The syntactic form \fB{*}\fR is handled like \fBeval\fR. I.e. if it
is given a literal list argument the system tracks the line number
within the list words as well, and otherwise all line numbers are
counted relative to the start of each word (smallest scope)
.RE
.TP
\fBinfo functions \fR?\fIpattern\fR?
.
If \fIpattern\fR is not specified, returns a list of all the math
functions currently defined.
If \fIpattern\fR is specified, only those functions whose name matches
\fIpattern\fR are returned.  Matching is determined using the same
rules as for \fBstring match\fR.
.TP
\fBinfo globals \fR?\fIpattern\fR?
.
If \fIpattern\fR is not specified, returns a list of all the names
of currently-defined global variables.
Global variables are variables in the global namespace.
If \fIpattern\fR is specified, only those names matching \fIpattern\fR
are returned.  Matching is determined using the same rules as for
\fBstring match\fR.
.TP
\fBinfo hostname\fR
.
Returns the name of the computer on which this invocation is being
executed.

Note that this name is not guaranteed to be the fully qualified domain
name of the host.  Where machines have several different names (as is
common on systems with both TCP/IP (DNS) and NetBIOS-based networking
installed,) it is the name that is suitable for TCP/IP networking that
is returned.
.TP
\fBinfo level\fR ?\fInumber\fR?
.
If \fInumber\fR is not specified, this command returns a number
giving the stack level of the invoking procedure, or 0 if the
command is invoked at top-level.  If \fInumber\fR is specified,
then the result is a list consisting of the name and arguments for the
procedure call at level \fInumber\fR on the stack.  If \fInumber\fR
is positive then it selects a particular stack level (1 refers
to the top-most active procedure, 2 to the procedure it called, and
so on); otherwise it gives a level relative to the current level
(0 refers to the current procedure, -1 to its caller, and so on).
See the \fBuplevel\fR command for more information on what stack
levels mean.
.TP
\fBinfo library\fR
.
Returns the name of the library directory in which standard Tcl
scripts are stored.
This is actually the value of the \fBtcl_library\fR
variable and may be changed by setting \fBtcl_library\fR.
.TP
\fBinfo loaded \fR?\fIinterp\fR? ?\fIpackage\fR?
.
Returns the filename loaded as part of \fIpackage\fR. If \fIpackage\fR
is not specified, returns a list describing all of the packages
that have been loaded into \fIinterp\fR with the \fBload\fR command.
Each list element is a sub-list with two elements consisting of the
name of the file from which the package was loaded and the name of
the package.
For statically-loaded packages the file name will be an empty string.
If \fIinterp\fR is omitted then information is returned for all packages
loaded in any interpreter in the process.
To get a list of just the packages in the current interpreter, specify
an empty string for the \fIinterp\fR argument.
.TP
\fBinfo locals \fR?\fIpattern\fR?
.
If \fIpattern\fR is not specified, returns a list of all the names
of currently-defined local variables, including arguments to the
current procedure, if any.


Variables defined with the \fBglobal\fR, \fBupvar\fR  and
\fBvariable\fR commands will not be returned.
If \fIpattern\fR is specified, only those names matching \fIpattern\fR
are returned.  Matching is determined using the same rules as for
\fBstring match\fR.

.TP
\fBinfo nameofexecutable\fR
.
Returns the full path name of the binary file from which the application
was invoked.  If Tcl was unable to identify the file, then an empty
string is returned.
.TP
\fBinfo object\fI subcommand object\fR ?\fIarg ...\fR
.
Returns information about the object, \fIobject\fR. The \fIsubcommand\fRs are
described in \fBOBJECT INTROSPECTION\fR below.
.TP
\fBinfo patchlevel\fR
.
Returns the value of the global variable \fBtcl_patchLevel\fR, which holds
the exact version of the Tcl library by default.
.TP
\fBinfo procs \fR?\fIpattern\fR?
.
If \fIpattern\fR is not specified, returns a list of all the
names of Tcl command procedures in the current namespace.
If \fIpattern\fR is specified,
only those procedure names in the current namespace
matching \fIpattern\fR are returned.
Matching is determined using the same rules as for
\fBstring match\fR.
If \fIpattern\fR contains any namespace separators, they are used to
select a namespace relative to the current namespace (or relative to
the global namespace if \fIpattern\fR starts with \fB::\fR) to match
within; the matching pattern is taken to be the part after the last
namespace separator.
.TP
\fBinfo script\fR ?\fIfilename\fR?
.
If a Tcl script file is currently being evaluated (i.e. there is a
call to \fBTcl_EvalFile\fR active or there is an active invocation
of the \fBsource\fR command), then this command returns the name
of the innermost file being processed.  If \fIfilename\fR is specified,
then the return value of this command will be modified for the
duration of the active invocation to return that name.  This is



useful in virtual file system applications.
Otherwise the command returns an empty string.

.TP
\fBinfo sharedlibextension\fR
.
Returns the extension used on this platform for the names of files
containing shared libraries (for example, \fB.so\fR under Solaris).
If shared libraries are not supported on this platform then an empty
string is returned.
.TP
\fBinfo tclversion\fR
.
Returns the value of the global variable \fBtcl_version\fR, which holds the
major and minor version of the Tcl library by default.
.TP
\fBinfo vars\fR ?\fIpattern\fR?
.
If \fIpattern\fR is not specified,
returns a list of all the names of currently-visible variables.
This includes locals and currently-visible globals.
If \fIpattern\fR is specified, only those names matching \fIpattern\fR
are returned.  Matching is determined using the same rules as for
\fBstring match\fR.
\fIpattern\fR can be a qualified name like \fBFoo::option*\fR.
That is, it may specify a particular namespace
using a sequence of namespace names separated by double colons (\fB::\fR),
and may have pattern matching special characters
at the end to specify a set of variables in that namespace.

If \fIpattern\fR is a qualified name,
the resulting list of variable names
has each matching namespace variable qualified with the name
of its namespace.
Note that a currently-visible variable may not yet
.QW exist
if it has not
been set (e.g. a variable declared but not set by \fBvariable\fR).



.SS "CLASS INTROSPECTION"
.PP
The following \fIsubcommand\fR values are supported by \fBinfo class\fR:
.TP
\fBinfo class call\fI class method\fR
.
Returns a description of the method implementations that are used to provide a
................................................................................
\fIclass\fR, not \fIclass\fR itself. The \fIkind\fR can be either
\fB\-class\fR to return the definition namespace used for \fBoo::define\fR, or
\fB\-instance\fR to return the definition namespace used for
\fBoo::objdefine\fR; the \fB\-class\fR kind is default (though this is only
actually useful on classes that are subclasses of \fBoo::class\fR).
.RS
.PP
If \fIclass\fR does not provide a definition namespace of the specified kind,
this command returns the empty string. In those circumstances, the
\fBoo::define\fR and \fBoo::objdefine\fR commands look up which definition
namespace to use using the class inheritance hierarchy.
.RE
.VE TIP524
.TP
\fBinfo class destructor\fI class\fR
................................................................................
optional \fIpattern\fR argument is present, it constrains the list of returned
instances to those that match it according to the rules of \fBstring match\fR.
.TP
\fBinfo class methods\fI class\fR ?\fIoptions...\fR?
.
This subcommand returns a list of all public (i.e. exported) methods of the
class called \fIclass\fR. Any of the following \fIoption\fRs may be
specified, controlling exactly which method names are returned:
.RS
.TP
\fB\-all\fR
.
If the \fB\-all\fR flag is given,
.VS TIP500
and the \fB\-scope\fR flag is not given,
................................................................................
.TP
\fBinfo class variables\fI class\fR ?\fB\-private\fR?
.
This subcommand returns a list of all variables that have been declared for
the class named \fIclass\fR (i.e. that are automatically present in the
class's methods, constructor and destructor).
.VS TIP500
If the \fB\-private\fR option is specified, this lists the private variables
declared instead.
.VE TIP500
.SS "OBJECT INTROSPECTION"
.PP
The following \fIsubcommand\fR values are supported by \fBinfo object\fR:
.TP
\fBinfo object call\fI object method\fR
................................................................................
and the call chains that this command files do not actually contain private
methods.
.VE TIP500
.RE
.TP
\fBinfo object class\fI object\fR ?\fIclassName\fR?
.
If \fIclassName\fR is unspecified, this subcommand returns class of the
\fIobject\fR object. If \fIclassName\fR is present, this subcommand returns a
boolean value indicating whether the \fIobject\fR is of that class.
.TP
\fBinfo object creationid\fI object\fR
.VS TIP500
Returns the unique creation identifier for the \fIobject\fR object. This
creation identifier is unique to the object (within a Tcl interpreter) and
................................................................................
direct or indirect).
.RE
.TP
\fBinfo object methods\fI object\fR ?\fIoption...\fR?
.
This subcommand returns a list of all public (i.e. exported) methods of the
object called \fIobject\fR. Any of the following \fIoption\fRs may be
specified, controlling exactly which method names are returned:
.RS
.TP
\fB\-all\fR
.
If the \fB\-all\fR flag is given,
.VS TIP500
and the \fB\-scope\fR flag is not given,
................................................................................
.TP
\fBinfo object variables\fI object\fRR ?\fB\-private\fR?
.
This subcommand returns a list of all variables that have been declared for
the object named \fIobject\fR (i.e. that are automatically present in the
object's methods).
.VS TIP500
If the \fB\-private\fR option is specified, this lists the private variables
declared instead.
.VE TIP500
.TP
\fBinfo object vars\fI object\fR ?\fIpattern\fR?
.
This subcommand returns a list of all variables in the private namespace of
the object named \fIobject\fR. If the optional \fIpattern\fR argument is

'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH info n 8.4 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
info \- Information about the state of the Tcl interpreter
.SH SYNOPSIS
\fBinfo \fIoption \fR?\fIarg arg ...\fR?
.BE
.SH DESCRIPTION
.PP
Available commands:


.TP
\fBinfo args \fIprocname\fR
.
Returns the names of the parameters to the procedure named \fIprocname\fR.


.TP
\fBinfo body \fIprocname\fR
.
Returns the body of the procedure named \fIprocname\fR.

.TP
\fBinfo class\fI subcommand class\fR ?\fIarg ...\fR
.
Returns information about the class named \fIclass\fR.
See \fBCLASS INTROSPECTION\fR below.
.TP
\fBinfo cmdcount\fR
.

Returns the total number of commands evaluated in this interpreter.
.TP
\fBinfo cmdtype \fIcommandName\fR
.VS TIP426
Returns a the type of the command named \fIcommandName\fR.
Built-in types are:
.RS
.IP \fBalias\fR
\fIcommandName\fR was created by \fBinterp alias\fR.
In a safe interpreter an alias is only visible if both the alias and the
target are visible.
.IP \fBcoroutine\fR
\fIcommandName\fR was created by \fBcoroutine\fR.
.IP \fBensemble\fR
\fIcommandName\fR was created by \fBnamespace ensemble\fR.
.IP \fBimport\fR
\fIcommandName\fR was created by \fBnamespace import\fR.
.IP \fBnative\fR
\fIcommandName\fR was created by the \fBTcl_CreateObjProc\fR
interface directly without further registration of the type of command.
.IP \fBobject\fR
\fIcommandName\fR is the public command that represents an
instance of \fBoo::object\fR or one of its subclasses.
.IP \fBprivateObject\fR
\fIcommandName\fR is the private command, \fBmy\fR by default,
that represents an instance of \fBoo::object\fR or one of its subclasses.
.IP \fBproc\fR
\fIcommandName\fR was created by \fBproc\fR.
.IP \fBslave\fR
\fIcommandName\fR was created by \fBinterp create\fR.
.IP \fBzlibStream\fR
\fIcommandName\fR was created by \fBzlib stream\fR.
.PP

Other types may be also registered as well.  See \fBTcl_RegisterCommandTypeName\fR.
.RE
.VE TIP426
.TP
\fBinfo commands \fR?\fIpattern\fR?
.
Returns the names of all commands visible in the current namespace.  If
\fIpattern\fR is given, returns only those names that match according to











\fBstring match\fR.  Only the last component of \fIpattern\fR is a pattern.





Other components identify a namespace.  See \fBNAMESPACE RESOLUTION\fR in the
\fBnamespace\fR(n) documentation.
.TP
\fBinfo complete \fIcommand\fR
.
Returns 1 if \fIcommand\fR is a complete command, and \fB0\fR otherwise.


Typically used in line-oriented input environments
to allow users to type in commands that span multiple lines.


.TP
\fBinfo coroutine\fR
.
Returns the name of the current \fBcoroutine\fR, or the empty
string if there is no current coroutine or the current coroutine
has been deleted.
.TP
\fBinfo default \fIprocname parameter varname\fR
.
If the parameter \fIparameter\fR for the procedure named \fIprocname\fR has a
default value, stores that value in \fIvarname\fR and returns \fB1\fR.
Otherwise, returns \fB0\fR.


.TP
\fBinfo errorstack \fR?\fIinterp\fR?
.
Returns a description of the active command at each level for the
last error in the current interpreter, or in the interpreter named
\fIinterp\fR if given.
.RS
.PP
The description is a dictionary of tokens and parameters. Tokens are
currently either \fBCALL\fR, \fBUP\fR, or \fBINNER\fR, but other values may be
introduced in the future. \fBCALL\fR indicates a command call, and its
parameter is the corresponding \fBinfo level\fR \fB0\fR. \fBUP\fR indicates a
shift in variable frames generated by \fBuplevel\fR or similar, and applies to
the previous \fBCALL\fR item. Its parameter is the level offset. \fBINNER\fR
identifies the
.QW "inner context" ,
which is the innermost atomic command or bytecode instruction that raised the
error, along with its arguments when available. While \fBCALL\fR and \fBUP\fR
provide a trail of the call path, \fBINNER\fR provides details of the offending
operation in the innermost procedure call, even to sub-expression
granularity.
.PP
This information is also present in the \fB\-errorstack\fR entry of the
options dictionary returned by 3-argument \fBcatch\fR; \fBinfo errorstack\fR
is a convenient way of retrieving it for uncaught errors at top-level in an
interactive \fBinterpreter\fR.
.RE
.TP
\fBinfo exists \fIvarName\fR
.
Returns \fB1\fR if a variable named \fIvarName\fR is visible and has been

defined, and \fB0\fR otherwise.
.TP
\fBinfo frame\fR ?\fIdepth\fR?
.
Returns the depth of the call to \fBinfo frame\fR itself.  Otherwise, returns a
dictionary describing the active command at the \fIdepth\fR, which counts all
commands visible to \fBinfo level\fR, plus commands that don't create a new
level, such as \fBeval\fR, \fBsource\fR, or \fIuplevel\fR. The frame depth is
always greater than the current level.


.RS
.PP






If \fIdepth\fR is greater than \fB0\fR it is the frame at that depth.  Otherwise
it is the number of frames up from the current frame.
.PP





As with \fBinfo level\fR and error traces, for nested commands like
.QW "foo [bar [x]]" ,
only
.QW x
is seen by \fBinfo frame\fR invoked within
.QW x .

.PP
The dictionary may contain the following keys:

.TP
\fBtype\fR
.

Always present.  Possible values are \fBsource\fR, \fBproc\fR,
\fBeval\fR, and \fBprecompiled\fR.
.RS
.TP
\fBsource\fR\0\0\0\0\0\0\0\0
.
A script loaded via the \fBsource\fR
command.
.TP
\fBproc\fR\0\0\0\0\0\0\0\0
.
The body of a procedure that could not be traced back to a
line in a particular script.
.TP
\fBeval\fR\0\0\0\0\0\0\0\0
.
The body of a script provided to \fBeval\fR or \fBuplevel\fR.
.TP
\fBprecompiled\fR\0\0\0\0\0\0\0\0
.
A pre-compiled script (loadable by the package
\fBtbcload\fR), and no further information is available.

.RE
.TP
\fBline\fR
.
The line number of of the command inside its script.  Not available for
\fBprecompiled\fR commands.  When the type is \fBsource\fR, the line number is

relative to the beginning of the file, whereas for the last two types it is
relative to the start of the script.
.TP
\fBfile\fR
.
For type \fBsource\fR, provides the normalized path of the file that contains
the command.
.TP
\fBcmd\fR
.
The command before substitutions were performed.





.TP
\fBproc\fR
.
For type \fBprod\fR, the name of the procedure containing the command.

.TP
\fBlambda\fR
.
For a command in a script evaluated as the body of an unnamed routine via the

\fBapply\fR command, the definition of that routine.
.TP
\fBlevel\fR
.
For a frame that corresponds to a level, (to be determined).
.PP
When a command can be traced to its literal definition in some script, e.g.
procedures nested in statically defined procedures, and literal eval scripts in
files or statically defined procedures, its type is \fBsource\fR and its
location is the absolute line number in the script.  Otherwise, its type is
\fBproc\fR and its location is its line number within the body of the
procedure. 


.PP
In contrast, procedure definitions and \fBeval\fR within a dynamically
\fBeval\fRuated environment count line numbers relative to the start of
their script, even if they would be able to count relative to the
start of the outer dynamic script. That type of number usually makes
more sense.
.PP
A different way of describing this behaviour is that file-based
locations are tracked as deeply as possible, and where this is not
possible the lines are counted based on the smallest possible
\fBeval\fR or procedure body, as that scope is usually easier to find
than any dynamic outer scope.
.PP
The syntactic form \fB{*}\fR is handled like \fBeval\fR. I.e. if it
is given a literal list argument the system tracks the line number
within the list words as well, and otherwise all line numbers are
counted relative to the start of each word (smallest scope)
.RE
.TP
\fBinfo functions \fR?\fIpattern\fR?
.
If \fIpattern\fR is not given, returns a list of all the math
functions currently defined.
If \fIpattern\fR is given, returns only those names that match

\fIpattern\fR according to \fBstring match\fR.
.TP
\fBinfo globals \fR?\fIpattern\fR?
.
If \fIpattern\fR is not given, returns a list of all the names
of currently-defined global variables.
Global variables are variables in the global namespace.
If \fIpattern\fR is given, only those names matching \fIpattern\fR
are returned.  Matching is determined using the same rules as for
\fBstring match\fR.
.TP
\fBinfo hostname\fR
.
Returns the name of the current host.


This name is not guaranteed to be the fully-qualified domain
name of the host.  Where machines have several different names, as is
common on systems with both TCP/IP (DNS) and NetBIOS-based networking
installed, it is the name that is suitable for TCP/IP networking that
is returned.
.TP
\fBinfo level\fR ?\fIlevel\fR?
.
If \fInumber\fR is not given, the level this routine was called from.
Otherwise returns the complete command active at the given level.  If
\fInumber\fR is greater than \fB0\fR, it is the desired level.  Otherwise, it
is \fInumber\fR levels up from the current level.  A complete command is the
words in the command, with all subsitutions performed, meaning that it is a




list.  See \fBuplevel\fR for more information on levels.

.TP
\fBinfo library\fR
.
Returns the value of \fBtcl_library\fR, which is the name of the library
directory in which the scripts distributed with Tcl scripts are stored.


.TP
\fBinfo loaded \fR?\fIinterp\fR? ?\fIpackage\fR?
.
Returns the name of each file loaded in \fIinterp\fR va \fBload\fR as part of
\fIpackage\fR .  If \fIpackage\fR is not given, returns a list where each item
is the name of the loaded file and the name of the package for which the file
was loaded.  For a statically-loaded package the name of the file is the empty
string.  For \fInterp\fR, the empty string is the current interpreter.






.TP
\fBinfo locals \fR?\fIpattern\fR?
.



If \fIpattern\fR is given, returns the name of each local variable matching
\fIpattern\fR according to \fBstring match\fR.  Otherwise, returns the name of
each local variable.  A variables defined with the \fBglobal\fR, \fBupvar\fR or
\fBvariable\fR is not local.




.TP
\fBinfo nameofexecutable\fR
.
Returns the absolute pathname of the program for the current interpreter.  If

such a file can not be identified an empty string is returned.
.TP
\fBinfo object\fI subcommand object\fR ?\fIarg ...\fR
.
Returns information about the object named \fIobject\fR. \fIsubcommand\fR is
described \fBOBJECT INTROSPECTION\fR below.
.TP
\fBinfo patchlevel\fR
.
Returns the value of the global variable \fBtcl_patchLevel\fR, in which the 
exact version of the Tcl library initially stored.
.TP
\fBinfo procs \fR?\fIpattern\fR?
.
Returns the names of all visible procedures. If \fIpattern\fR is given, returns
only those names that match according to \fBstring match\fR.  Only the final
component in \fIpattern\fR is actually considered a pattern.  Any qualifying
components simply select a namespace.  See \fBNAMESPACE RESOLUTION\fR in the
\fBnamespace\fR(n) documentation.







.TP
\fBinfo script\fR ?\fIfilename\fR?
.






Returns the pathname of the innermost script currently being evaluated, or the
empty string if no pathname can be determined.  If \fIfilename\fR is given,
sets the return value of any future calls to \fBinfo script\fR for the duration
of the innermost active script.  This is useful in virtual file system

applications.
.TP
\fBinfo sharedlibextension\fR
.
Returns the extension used on this platform for names of shared libraries, e.g.
\fB.so\fR under Solaris.  Returns the empty string if shared libraries are not
supported on this platform.

.TP
\fBinfo tclversion\fR
.
Returns the value of the global variable \fBtcl_version\fR, in which the
major and minor version of the Tcl library are stored.
.TP
\fBinfo vars\fR ?\fIpattern\fR?
.
If \fIpattern\fR is not given, returns the names of all visible variables.  If
\fIpattern\fR is given, returns only those names that match according to



\fBstring match\fR.  Only the last component of \fIpattern\fR is a pattern.





Other components identify a namespace.  See \fBNAMESPACE RESOLUTION\fR in the
\fBnamespace\fR(n) documentation.  When \fIpattern\fR is a qualified name,







results are fully qualified.

A variable that has declared but not yet defined is included in the results.
.SS "CLASS INTROSPECTION"
.PP
The following \fIsubcommand\fR values are supported by \fBinfo class\fR:
.TP
\fBinfo class call\fI class method\fR
.
Returns a description of the method implementations that are used to provide a
................................................................................
\fIclass\fR, not \fIclass\fR itself. The \fIkind\fR can be either
\fB\-class\fR to return the definition namespace used for \fBoo::define\fR, or
\fB\-instance\fR to return the definition namespace used for
\fBoo::objdefine\fR; the \fB\-class\fR kind is default (though this is only
actually useful on classes that are subclasses of \fBoo::class\fR).
.RS
.PP
If \fIclass\fR does not provide a definition namespace of the given kind,
this command returns the empty string. In those circumstances, the
\fBoo::define\fR and \fBoo::objdefine\fR commands look up which definition
namespace to use using the class inheritance hierarchy.
.RE
.VE TIP524
.TP
\fBinfo class destructor\fI class\fR
................................................................................
optional \fIpattern\fR argument is present, it constrains the list of returned
instances to those that match it according to the rules of \fBstring match\fR.
.TP
\fBinfo class methods\fI class\fR ?\fIoptions...\fR?
.
This subcommand returns a list of all public (i.e. exported) methods of the
class called \fIclass\fR. Any of the following \fIoption\fRs may be
given, controlling exactly which method names are returned:
.RS
.TP
\fB\-all\fR
.
If the \fB\-all\fR flag is given,
.VS TIP500
and the \fB\-scope\fR flag is not given,
................................................................................
.TP
\fBinfo class variables\fI class\fR ?\fB\-private\fR?
.
This subcommand returns a list of all variables that have been declared for
the class named \fIclass\fR (i.e. that are automatically present in the
class's methods, constructor and destructor).
.VS TIP500
If the \fB\-private\fR option is given, this lists the private variables
declared instead.
.VE TIP500
.SS "OBJECT INTROSPECTION"
.PP
The following \fIsubcommand\fR values are supported by \fBinfo object\fR:
.TP
\fBinfo object call\fI object method\fR
................................................................................
and the call chains that this command files do not actually contain private
methods.
.VE TIP500
.RE
.TP
\fBinfo object class\fI object\fR ?\fIclassName\fR?
.
If \fIclassName\fR is not given, this subcommand returns class of the
\fIobject\fR object. If \fIclassName\fR is present, this subcommand returns a
boolean value indicating whether the \fIobject\fR is of that class.
.TP
\fBinfo object creationid\fI object\fR
.VS TIP500
Returns the unique creation identifier for the \fIobject\fR object. This
creation identifier is unique to the object (within a Tcl interpreter) and
................................................................................
direct or indirect).
.RE
.TP
\fBinfo object methods\fI object\fR ?\fIoption...\fR?
.
This subcommand returns a list of all public (i.e. exported) methods of the
object called \fIobject\fR. Any of the following \fIoption\fRs may be
given, controlling exactly which method names are returned:
.RS
.TP
\fB\-all\fR
.
If the \fB\-all\fR flag is given,
.VS TIP500
and the \fB\-scope\fR flag is not given,
................................................................................
.TP
\fBinfo object variables\fI object\fRR ?\fB\-private\fR?
.
This subcommand returns a list of all variables that have been declared for
the object named \fIobject\fR (i.e. that are automatically present in the
object's methods).
.VS TIP500
If the \fB\-private\fR option is given, this lists the private variables
declared instead.
.VE TIP500
.TP
\fBinfo object vars\fI object\fR ?\fIpattern\fR?
.
This subcommand returns a list of all variables in the private namespace of
the object named \fIobject\fR. If the optional \fIpattern\fR argument is

\fBzipfs root\fR
.
Returns a constant string which indicates the mount point for zipfs volumes
for the current platform. On Windows, this value is
.QW \fBzipfs:/\fR .
On Unix, this value is
.QW \fB//zipfs:/\fR .
.RE
.TP
\fBzipfs unmount \fImountpoint\fR
.
Unmounts a previously mounted ZIP archive mounted to \fImountpoint\fR.
.SS "ZIP CREATION COMMANDS"
This package also provides several commands to aid the creation of ZIP
archives as Tcl applications.
................................................................................
.SH "EXAMPLES"
.PP
Mounting an ZIP archive as an application directory and running code out of it
before unmounting it again:
.PP
.CS
set zip myApp.zip
set base [file join [\fbzipfs root\fR] myApp]

\fBzipfs mount\fR $base $zip
# $base now has the contents of myApp.zip

source [file join $base app.tcl]
# use the contents, load libraries from it, etc...

................................................................................
Encryption can be applied to ZIP archives by providing a password when
building the ZIP and when mounting it.
.PP
.CS
set zip myApp.zip
set sourceDir [file normalize myApp]
set password "hunter2"
set base [file join [\fbzipfs root\fR] myApp]

# Create with password
\fBzipfs mkzip\fR $targetZip $sourceDir $sourceDir $password

# Mount with password
\fBzipfs mount\fR $base $zip $password
.CE

\fBzipfs root\fR
.
Returns a constant string which indicates the mount point for zipfs volumes
for the current platform. On Windows, this value is
.QW \fBzipfs:/\fR .
On Unix, this value is
.QW \fB//zipfs:/\fR .

.TP
\fBzipfs unmount \fImountpoint\fR
.
Unmounts a previously mounted ZIP archive mounted to \fImountpoint\fR.
.SS "ZIP CREATION COMMANDS"
This package also provides several commands to aid the creation of ZIP
archives as Tcl applications.
................................................................................
.SH "EXAMPLES"
.PP
Mounting an ZIP archive as an application directory and running code out of it
before unmounting it again:
.PP
.CS
set zip myApp.zip
set base [file join [\fBzipfs root\fR] myApp]

\fBzipfs mount\fR $base $zip
# $base now has the contents of myApp.zip

source [file join $base app.tcl]
# use the contents, load libraries from it, etc...

................................................................................
Encryption can be applied to ZIP archives by providing a password when
building the ZIP and when mounting it.
.PP
.CS
set zip myApp.zip
set sourceDir [file normalize myApp]
set password "hunter2"
set base [file join [\fBzipfs root\fR] myApp]

# Create with password
\fBzipfs mkzip\fR $targetZip $sourceDir $sourceDir $password

# Mount with password
\fBzipfs mount\fR $base $zip $password
.CE

 *
 * Tcl_UtfBackslash --
 *
 *	Figure out how to handle a backslash sequence.
 *
 * Results:
 *	Stores the bytes represented by the backslash sequence in dst and
 *	returns the number of bytes written to dst. At most TCL_UTF_MAX bytes
 *	are written to dst; dst must have been large enough to accept those
 *	bytes. If readPtr isn't NULL then it is filled in with a count of the
 *	number of bytes in the backslash sequence.
 *
 * Side effects:
 *	The maximum number of bytes it takes to represent a Unicode character
 *	in UTF-8 is guaranteed to be less than the number of bytes used to

 *
 * Tcl_UtfBackslash --
 *
 *	Figure out how to handle a backslash sequence.
 *
 * Results:
 *	Stores the bytes represented by the backslash sequence in dst and
 *	returns the number of bytes written to dst. At most 4 bytes
 *	are written to dst; dst must have been large enough to accept those
 *	bytes. If readPtr isn't NULL then it is filled in with a count of the
 *	number of bytes in the backslash sequence.
 *
 * Side effects:
 *	The maximum number of bytes it takes to represent a Unicode character
 *	in UTF-8 is guaranteed to be less than the number of bytes used to

    expr {"\u4e21" eq [testbytestring "\xe4\xb8\xa1"]}
} 1
test utf-10.4 {Tcl_UtfBackslash: stops at first non-hex} testbytestring {
    expr {"\u4e2k" eq "[testbytestring \xd3\xa2]k"}
} 1
test utf-10.5 {Tcl_UtfBackslash: stops after 4 hex chars} testbytestring {
    expr {"\u4e216" eq "[testbytestring \xe4\xb8\xa1]6"}






} 1
proc bsCheck {char num} {
    global errNum
    test utf-10.$errNum {backslash substitution} {
	scan $char %c value
	set value
    } $num

    expr {"\u4e21" eq [testbytestring "\xe4\xb8\xa1"]}
} 1
test utf-10.4 {Tcl_UtfBackslash: stops at first non-hex} testbytestring {
    expr {"\u4e2k" eq "[testbytestring \xd3\xa2]k"}
} 1
test utf-10.5 {Tcl_UtfBackslash: stops after 4 hex chars} testbytestring {
    expr {"\u4e216" eq "[testbytestring \xe4\xb8\xa1]6"}
} 1
test utf-10.6 {Tcl_UtfBackslash: stops after 5 hex chars} testbytestring {
    expr {"\U1e2165" eq "[testbytestring \xf0\x9e\x88\x96]5"}
} 1
test utf-10.6 {Tcl_UtfBackslash: stops after 6 hex chars} testbytestring {
    expr {"\U10e2165" eq "[testbytestring \xf4\x8e\x88\x96]5"}
} 1
proc bsCheck {char num} {
    global errNum
    test utf-10.$errNum {backslash substitution} {
	scan $char %c value
	set value
    } $num

    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # get 1 UTF-8 character
    Wrapper_Tcl_StringMatch "a\[a\u4e4fc]c" "a\u4e4fc"
} 1
test util-5.18 {Tcl_StringMatch: UTF-8} testbytestring {
    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # proper advance: wrong answer would match on UTF trail byte of \u4e4f
    Wrapper_Tcl_StringMatch {a[a\u4e4fc]c} [testbytestring a\u008fc]
} 0
test util-5.19 {Tcl_StringMatch: UTF-8} {
    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # proper advance.
    Wrapper_Tcl_StringMatch {a[a\u4e4fc]c} "acc"
} 1
test util-5.20 {Tcl_StringMatch} {

    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # get 1 UTF-8 character
    Wrapper_Tcl_StringMatch "a\[a\u4e4fc]c" "a\u4e4fc"
} 1
test util-5.18 {Tcl_StringMatch: UTF-8} testbytestring {
    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # proper advance: wrong answer would match on UTF trail byte of \u4e4f
    Wrapper_Tcl_StringMatch {a[a\u4e4fc]c} [testbytestring a\x8fc]
} 0
test util-5.19 {Tcl_StringMatch: UTF-8} {
    # pattern += Tcl_UtfToUniChar(pattern, &endChar);
    # proper advance.
    Wrapper_Tcl_StringMatch {a[a\u4e4fc]c} "acc"
} 1
test util-5.20 {Tcl_StringMatch} {

##
## Source the utility functions that provide most of the
## implementation of the transformation from nroff to html.
##
source [file join [file dirname [info script]] tcltk-man2html-utils.tcl]
 
































proc parse_command_line {} {
    global argv Version

    # These variables determine where the man pages come from and where
    # the converted pages go to.
    global tcltkdir tkdir tcldir webdir build_tcl build_tk verbose

    # Set defaults based on original code.
    set tcltkdir ../..
    set tkdir {}
    set tcldir {}
    set webdir ../html
    set build_tcl 0

    set build_tk 0

    set verbose 0
    # Default search version is a glob pattern
    set useversion {{,[8-9].[0-9]{,[.ab][0-9]{,[0-9]}}}}

    # Handle arguments a la GNU:
    #   --version
    #   --useversion=<version>
................................................................................
	    --useversion=* {
		# length of "--useversion=" is 13
		set useversion [string range $option 13 end]
	    }

	    --tcl {
		set build_tcl 1

	    }

	    --tk {
		set build_tk 1

	    }

	    --verbose=* {
		set verbose [string range $option \
				 [string length --verbose=] end]
	    }
	    default {
................................................................................
    if {!$build_tcl && !$build_tk} {
	set build_tcl 1;
	set build_tk 1
    }

    if {$build_tcl} {
	# Find Tcl.
	set tcldir [lindex [lsort [glob -nocomplain -tails -type d \
		-directory $tcltkdir tcl$useversion]] end]
	if {$tcldir eq ""} {
	    puts stderr "tcltk-man-html: couldn't find Tcl below $tcltkdir"
	    exit 1
	}
	puts "using Tcl source directory $tcldir"
    }


    if {$build_tk} {
	# Find Tk.
	set tkdir [lindex [lsort [glob -nocomplain -tails -type d \
		-directory $tcltkdir tk$useversion]] end]
	if {$tkdir eq ""} {
	    puts stderr "tcltk-man-html: couldn't find Tk below $tcltkdir"
	    exit 1
	}
	puts "using Tk source directory $tkdir"
    }

    puts "verbose messages are [expr {$verbose ? {on} : {off}}]"

    # the title for the man pages overall
    global overall_title
    set overall_title ""
    if {$build_tcl} {
	append overall_title "[capitalize $tcldir]"
    }
    if {$build_tcl && $build_tk} {
	append overall_title "/"
    }
    if {$build_tk} {
	append overall_title "[capitalize $tkdir]"
    }

##
## Source the utility functions that provide most of the
## implementation of the transformation from nroff to html.
##
source [file join [file dirname [info script]] tcltk-man2html-utils.tcl]
 
proc findversion {top name useversion} {
    set upper [string toupper $name]
    foreach top1 [list $top $top/..] sub {{} generic} {
	foreach dirname [
	    glob -nocomplain -tails -type d -directory $top1 *] {

	    set tclh [join [list $top1 $dirname {*}$sub $name.h] /]
	    if {[file exists $tclh]} {
		set chan [open $tclh]
		set data [read $chan]
		close $chan
		# backslash isn't required in front of quote, but it keeps syntax
		# highlighting straight in some editors
		if {[regexp -lineanchor \
		    [string map [list @[email protected] $upper] \
			{^#define\[email protected]@_VERSION\s+\"([^.])+\.([^.\"]+)}] \
		    $data -> major minor]} {
			# to do
			#     use glob matching instead of string matching or add
			#     brace handling to [string matcch]
			if {$useversion eq {} || [string match $useversion $major.$minor]} {
			    set top [file dirname [file dirname $tclh]]
			    set prefix [file dirname $top]
			    return [list $prefix [file tail $top] $major $minor]
			}
		}
	    }
	}
    }
    return
}

proc parse_command_line {} {
    global argv Version

    # These variables determine where the man pages come from and where
    # the converted pages go to.
    global tcltkdir tkdir tcldir webdir build_tcl build_tk verbose

    # Set defaults based on original code.
    set tcltkdir ../..
    set tkdir {}
    set tcldir {}
    set webdir ../html
    set build_tcl 0
    set opt_build_tcl 0
    set build_tk 0
    set opt_build_tk 0
    set verbose 0
    # Default search version is a glob pattern
    set useversion {{,[8-9].[0-9]{,[.ab][0-9]{,[0-9]}}}}

    # Handle arguments a la GNU:
    #   --version
    #   --useversion=<version>
................................................................................
	    --useversion=* {
		# length of "--useversion=" is 13
		set useversion [string range $option 13 end]
	    }

	    --tcl {
		set build_tcl 1
		set opt_build_tcl 1
	    }

	    --tk {
		set build_tk 1
		set opt_build_tk 1
	    }

	    --verbose=* {
		set verbose [string range $option \
				 [string length --verbose=] end]
	    }
	    default {
................................................................................
    if {!$build_tcl && !$build_tk} {
	set build_tcl 1;
	set build_tk 1
    }

    if {$build_tcl} {
	# Find Tcl.
	lassign [findversion $tcltkdir tcl $useversion] tcltkdir tcldir major minor

	if {$tcldir eq {} && $opt_build_tcl} {
	    puts stderr "tcltk-man-html: couldn't find Tcl below $tcltkdir"
	    exit 1
	}
	puts "using Tcl source directory $tcltkdir $tcldir"
    }


    if {$build_tk} {
	# Find Tk.
	lassign [findversion $tcltkdir tk $useversion] tcltkdir tkdir major minor

	if {$tkdir eq {} && $opt_build_tk} {
	    puts stderr "tcltk-man-html: couldn't find Tk below $tcltkdir"
	    exit 1
	}
	puts "using Tk source directory $tkdir"
    }

    puts "verbose messages are [expr {$verbose ? {on} : {off}}]"

    # the title for the man pages overall
    global overall_title
    set overall_title ""
    if {$build_tcl} {
	append overall_title "Tcl $major.$minor"
    }
    if {$build_tcl && $build_tk} {
	append overall_title "/"
    }
    if {$build_tk} {
	append overall_title "[capitalize $tkdir]"
    }

	$(BUILD_HTML) --tcl
	@[email protected]

html-tk: ${NATIVE_TCLSH}
	$(BUILD_HTML) --tk
	@[email protected]

# You'd better have these programs or you will have problems creating Makefile
# from Makefile.in in the first place...
HTML_VERSION = `basename $(TOP_DIR) | sed s/tcl//`
BUILD_HTML = \
	@${NATIVE_TCLSH} $(TOOL_DIR)/tcltk-man2html.tcl \
		--useversion=$(HTML_VERSION) --htmldir="$(HTML_INSTALL_DIR)" \
		--srcdir=$(TOP_DIR)/.. $(BUILD_HTML_FLAGS)

#--------------------------------------------------------------------------
# The list of all the targets that do not correspond to real files. This stops
# 'make' from getting confused when someone makes an error in a rule.
#--------------------------------------------------------------------------

.PHONY: all binaries libraries objs doc html html-tcl html-tk test runtest

	$(BUILD_HTML) --tcl
	@[email protected]

html-tk: ${NATIVE_TCLSH}
	$(BUILD_HTML) --tk
	@[email protected]




BUILD_HTML = \
	@${NATIVE_TCLSH} $(TOOL_DIR)/tcltk-man2html.tcl \
		--tcl --useversion=$(MAJOR_VERSION).$(MINOR_VERSION) --htmldir="$(HTML_INSTALL_DIR)" \
		--srcdir=$(TOP_DIR) $(BUILD_HTML_FLAGS)

#--------------------------------------------------------------------------
# The list of all the targets that do not correspond to real files. This stops
# 'make' from getting confused when someone makes an error in a rule.
#--------------------------------------------------------------------------

.PHONY: all binaries libraries objs doc html html-tcl html-tk test runtest