Tcl Source Code

			    int *srcReadPtr, int *dstWrotePtr,
			    int *dstCharsPtr);
static int		TableToUtfProc(ClientData clientData, const char *src,
			    int srcLen, int flags, Tcl_EncodingState *statePtr,
			    char *dst, int dstLen, int *srcReadPtr,
			    int *dstWrotePtr, int *dstCharsPtr);
static size_t		unilen(const char *src);
static int		Utf16ToUtfProc(ClientData clientData,
			    const char *src, int srcLen, int flags,
			    Tcl_EncodingState *statePtr, char *dst, int dstLen,
			    int *srcReadPtr, int *dstWrotePtr,
			    int *dstCharsPtr);
static int		UtfToUtf16Proc(ClientData clientData,
			    const char *src, int srcLen, int flags,
			    Tcl_EncodingState *statePtr, char *dst, int dstLen,
			    int *srcReadPtr, int *dstWrotePtr,
			    int *dstCharsPtr);
static int		UtfToUcs2Proc(ClientData clientData,
			    const char *src, int srcLen, int flags,
			    Tcl_EncodingState *statePtr, char *dst, int dstLen,
			    int *srcReadPtr, int *dstWrotePtr,
			    int *dstCharsPtr);
static int		UtfToUtfProc(ClientData clientData,
			    const char *src, int srcLen, int flags,
			    Tcl_EncodingState *statePtr, char *dst, int dstLen,

void
TclInitEncodingSubsystem(void)
{
    Tcl_EncodingType type;
    TableEncodingData *dataPtr;
    unsigned size;
    unsigned short i;
    union {
        char c;
        short s;
    } isLe;

    if (encodingsInitialized) {
	return;
    }

    isLe.s = 1;
    Tcl_MutexLock(&encodingMutex);
    Tcl_InitHashTable(&encodingTable, TCL_STRING_KEYS);
    Tcl_MutexUnlock(&encodingMutex);

    /*
     * Create a few initial encodings. Note that the UTF-8 to UTF-8
     * translation is not a no-op, because it will turn a stream of improperly

    type.toUtfProc	= UtfExtToUtfIntProc;
    type.fromUtfProc	= UtfIntToUtfExtProc;
    type.freeProc	= NULL;
    type.nullSize	= 1;
    type.clientData	= NULL;
    Tcl_CreateEncoding(&type);

    type.toUtfProc	= Utf16ToUtfProc;
    type.fromUtfProc    = UtfToUcs2Proc;
    type.freeProc	= NULL;
    type.nullSize	= 2;
    type.encodingName   = "ucs-2le";
    type.clientData	= INT2PTR(1);
    Tcl_CreateEncoding(&type);
    type.encodingName   = "ucs-2be";
    type.clientData	= INT2PTR(0);
    Tcl_CreateEncoding(&type);
    type.encodingName   = "ucs-2";
    type.clientData	= INT2PTR(isLe.c);
    Tcl_CreateEncoding(&type);

    type.toUtfProc	= Utf16ToUtfProc;
    type.fromUtfProc    = UtfToUtf16Proc;
    type.freeProc	= NULL;
    type.nullSize	= 2;
    type.encodingName   = "utf-16le";
    type.clientData	= INT2PTR(1);;
    Tcl_CreateEncoding(&type);
    type.encodingName   = "utf-16be";
    type.clientData	= INT2PTR(0);
    Tcl_CreateEncoding(&type);
    type.encodingName   = "utf-16";
    type.clientData	= INT2PTR(isLe.c);;
    Tcl_CreateEncoding(&type);

#ifndef TCL_NO_DEPRECATED
    type.encodingName   = "unicode";
    Tcl_CreateEncoding(&type);
#endif

    /*
     * Need the iso8859-1 encoding in order to process binary data, so force
     * it to always be embedded. Note that this encoding *must* be a proper
     * table encoding or some of the escape encodings crash! Hence the ugly
     * code to duplicate the structure of a table encoding here.
     */

	result = encodingPtr->toUtfProc(encodingPtr->clientData, src, srcLen,
		flags, statePtr, dst, dstLen, srcReadPtr, dstWrotePtr,
		dstCharsPtr);
	if (*dstCharsPtr <= maxChars) {
	    break;
	}
	dstLen = Tcl_UtfAtIndex(dst, maxChars) - dst + (TCL_UTF_MAX - 1);
	flags = savedFlags;
	*statePtr = savedState;
    } while (1);
    if (!noTerminate) {
	/* ...and then append it */

	dst[*dstWrotePtr] = '\0';

    *dstCharsPtr = numChars;
    return result;
}

/*
 *-------------------------------------------------------------------------
 *
 * Utf16ToUtfProc --
 *
 *	Convert from UTF-16 to UTF-8.
 *
 * Results:
 *	Returns TCL_OK if conversion was successful.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------------
 */

static int
Utf16ToUtfProc(
    ClientData clientData,	/* != NULL means LE, == NUL means BE */
    const char *src,		/* Source string in Unicode. */
    int srcLen,			/* Source string length in bytes. */
    int flags,			/* Conversion control flags. */
    Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
				 * information used during a piecewise
				 * conversion. Contents of statePtr are
				 * initialized and/or reset by conversion

    for (numChars = 0; src < srcEnd && numChars <= charLimit; numChars++) {
	if (dst > dstEnd) {
	    result = TCL_CONVERT_NOSPACE;
	    break;
	}

	if (clientData) {
	    ch = (src[1] & 0xFF) << 8 | (src[0] & 0xFF);
	} else {
	    ch = (src[0] & 0xFF) << 8 | (src[1] & 0xFF);
	}
	/*
	 * Special case for 1-byte utf chars for speed. Make sure we work with
	 * unsigned short-size data.
	 */


	if (ch && ch < 0x80) {
	    *dst++ = (ch & 0xFF);
	} else {
	    dst += Tcl_UniCharToUtf(ch, dst);
	}
	src += sizeof(unsigned short);
    }

    *srcReadPtr = src - srcStart;
    *dstWrotePtr = dst - dstStart;
    *dstCharsPtr = numChars;
    return result;
}

/*
 *-------------------------------------------------------------------------
 *
 * UtfToUtf16Proc --
 *
 *	Convert from UTF-8 to UTF-16.
 *
 * Results:
 *	Returns TCL_OK if conversion was successful.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------------
 */

static int
UtfToUtf16Proc(
    ClientData clientData,	/* != NULL means LE, == NUL means BE */

    const char *src,		/* Source string in UTF-8. */
    int srcLen,			/* Source string length in bytes. */
    int flags,			/* Conversion control flags. */
    Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
				 * information used during a piecewise
				 * conversion. Contents of statePtr are
				 * initialized and/or reset by conversion

	src += TclUtfToUniChar(src, chPtr);

	/*
	 * Need to handle this in a way that won't cause misalignment by
	 * casting dst to a Tcl_UniChar. [Bug 1122671]
	 */

	if (clientData) {
#if TCL_UTF_MAX > 4
	    if (*chPtr <= 0xFFFF) {
		*dst++ = (*chPtr & 0xFF);
		*dst++ = (*chPtr >> 8);
	    } else {


		*dst++ = (((*chPtr - 0x10000) >> 10) & 0xFF);
		*dst++ = (((*chPtr - 0x10000) >> 18) & 0x3) | 0xD8;
		*dst++ = (*chPtr & 0xFF);
		*dst++ = ((*chPtr & 0x3) >> 8) | 0xDC;
	    }
#else
	    *dst++ = (*chPtr & 0xFF);
	    *dst++ = (*chPtr >> 8);
#endif
	} else {
#if TCL_UTF_MAX > 4
	    if (*chPtr <= 0xFFFF) {
		*dst++ = (*chPtr >> 8);
		*dst++ = (*chPtr & 0xFF);
	    } else {
		*dst++ = ((*chPtr & 0x3) >> 8) | 0xDC;
		*dst++ = (*chPtr & 0xFF);
		*dst++ = (((*chPtr - 0x10000) >> 18) & 0x3) | 0xD8;
		*dst++ = (((*chPtr - 0x10000) >> 10) & 0xFF);


	    }
#else
	    *dst++ = (*chPtr >> 8);
	    *dst++ = (*chPtr & 0xFF);
#endif

	}
    }
    *srcReadPtr = src - srcStart;
    *dstWrotePtr = dst - dstStart;
    *dstCharsPtr = numChars;
    return result;
}

/*
 *-------------------------------------------------------------------------
 *
 * UtfToUcs2Proc --
 *
 *	Convert from UTF-8 to UCS-2.
 *
 * Results:
 *	Returns TCL_OK if conversion was successful.
 *
 * Side effects:
 *	None.
 *
 *-------------------------------------------------------------------------
 */

static int
UtfToUcs2Proc(
    ClientData clientData,	/* != NULL means LE, == NUL means BE */
    const char *src,		/* Source string in UTF-8. */
    int srcLen,			/* Source string length in bytes. */
    int flags,			/* Conversion control flags. */
    Tcl_EncodingState *statePtr,/* Place for conversion routine to store state
				 * information used during a piecewise
				 * conversion. Contents of statePtr are
				 * initialized and/or reset by conversion
				 * routine under control of flags argument. */
    char *dst,			/* Output buffer in which converted string is
				 * stored. */
    int dstLen,			/* The maximum length of output buffer in
				 * bytes. */
    int *srcReadPtr,		/* Filled with the number of bytes from the
				 * source string that were converted. This may
				 * be less than the original source length if
				 * there was a problem converting some source
				 * characters. */
    int *dstWrotePtr,		/* Filled with the number of bytes that were
				 * stored in the output buffer as a result of
				 * the conversion. */
    int *dstCharsPtr)		/* Filled with the number of characters that
				 * correspond to the bytes stored in the
				 * output buffer. */
{
    const char *srcStart, *srcEnd, *srcClose, *dstStart, *dstEnd;
    int result, numChars;
#if TCL_UTF_MAX <= 4
    int len;
#endif
    Tcl_UniChar ch = 0;

    srcStart = src;
    srcEnd = src + srcLen;
    srcClose = srcEnd;
    if ((flags & TCL_ENCODING_END) == 0) {
	srcClose -= TCL_UTF_MAX;
    }

    dstStart = dst;
    dstEnd   = dst + dstLen - sizeof(Tcl_UniChar);

    result = TCL_OK;
    for (numChars = 0; src < srcEnd; numChars++) {
	if ((src > srcClose) && (!Tcl_UtfCharComplete(src, srcEnd - src))) {
	    /*
	     * If there is more string to follow, this will ensure that the
	     * last UTF-8 character in the source buffer hasn't been cut off.
	     */

	    result = TCL_CONVERT_MULTIBYTE;
	    break;
	}
	if (dst > dstEnd) {
	    result = TCL_CONVERT_NOSPACE;
	    break;
	}
#if TCL_UTF_MAX <= 4
	src += (len = TclUtfToUniChar(src, &ch));
	if ((ch >= 0xD800) && (len < 3)) {
	    src += TclUtfToUniChar(src, &ch);
	    ch = 0xFFFD;
	}
#else
	src += TclUtfToUniChar(src, &ch);
	if (ch > 0xFFFF) {
	    ch = 0xFFFD;
	}
#endif

	/*
	 * Need to handle this in a way that won't cause misalignment by
	 * casting dst to a Tcl_UniChar. [Bug 1122671]
	 */

	if (clientData) {
	    *dst++ = (ch & 0xFF);
	    *dst++ = (ch >> 8);
	} else {
	    *dst++ = (ch >> 8);
	    *dst++ = (ch & 0xFF);
	}
    }
    *srcReadPtr = src - srcStart;
    *dstWrotePtr = dst - dstStart;
    *dstCharsPtr = numChars;
    return result;
}

/*
 *-------------------------------------------------------------------------
 *
 * TableToUtfProc --
 *
 *	Convert from the encoding specified by the TableEncodingData into
 *	UTF-8.

    apply {{a b} {
	set one [binary format H* $a]
	return $one[binary format H* $b]
    }} ab cd
} [binary format H* abcd]

test binary-78.1 {unicode (out of BMP) to byte-array conversion, bug-[bd94500678]} -body {
    # just test for BO-segfault (high surrogate w/o advance source pointer for out of BMP char if TCL_UTF_MAX == 3):
    binary encode hex \U0001f415
    binary scan \U0001f415 a* v; set v
    set str {}
} -result {}

# ----------------------------------------------------------------------
# cleanup

} -result {bbbbbbbbbbbbbbb 15 123456789abcdef 1 4 abcd 0 3 efg}
test chan-io-6.45 {Tcl_GetsObj: input saw cr, skip right number of bytes} -setup {
    set x ""
} -constraints {stdio testchannel openpipe fileevent} -body {
    # Tcl_ExternalToUtf()
    set f [openpipe w+ $path(cat)]
    chan configure $f -translation {auto lf} -buffering none
    chan configure $f -encoding utf-16
    chan puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
    chan configure $f -buffersize 16
    chan gets $f
    chan configure $f -blocking 0
    lappend x [chan gets $f line] $line [testchannel queuedcr $f]
    chan configure $f -blocking 1
    chan puts -nonewline $f "\nabcd\refg"

    # not (bufPtr->nextPtr == NULL)
    set f [openpipe w+ $path(cat)]
    chan configure $f -translation lf -encoding ascii -buffering none
    chan puts -nonewline $f "123456789012345\r\nbcdefghijklmnopqrstuvwxyz"
    chan event $f read [namespace code {
	lappend x [chan gets $f line] $line [testchannel inputbuffered $f]
    }]
    chan configure $f -encoding utf-16 -buffersize 16 -blocking 0
    vwait [namespace which -variable x]
    chan configure $f -translation auto -encoding ascii -blocking 1
    # here
    vwait [namespace which -variable x]
    return $x
} -cleanup {
    chan close $f

} 00
test encoding-15.3 {UtfToUtfProc null character input} teststringbytes {
    set y [encoding convertfrom utf-8 [encoding convertto utf-8 \u0000]]
    binary scan [teststringbytes $y] H* z
    set z
} c080

test encoding-16.1 {Utf16ToUtfProc} -body {
    set val [encoding convertfrom utf-16 NN]
    list $val [format %x [scan $val %c]]
} -result "\u4e4e 4e4e"
test encoding-16.2 {Utf16ToUtfProc} -body {
    set val [encoding convertfrom utf-16 "\xd8\xd8\xdc\xdc"]
    list $val [format %x [scan $val %c]]
} -result "\U460dc 460dc"
test encoding-16.3 {Ucs2ToUtfProc} -body {
    set val [encoding convertfrom ucs-2 NN]
    list $val [format %x [scan $val %c]]
} -result "\u4e4e 4e4e"
test encoding-16.4 {Ucs2ToUtfProc} -body {
    set val [encoding convertfrom ucs-2 "\xd8\xd8\xdc\xdc"]
    list $val [format %x [scan $val %c]]
} -result "\U460dc 460dc"

test encoding-17.1 {UtfToUtf16Proc} -body {
    encoding convertto utf-16 "\U460dc"
} -result "\xd8\xd8\xdc\xdc"
test encoding-17.2 {UtfToUcs2Proc} -body {
    encoding convertfrom utf-16 [encoding convertto ucs-2 "\U460dc"]
} -result "\ufffd"

test encoding-18.1 {TableToUtfProc} {
} {}

test encoding-19.1 {TableFromUtfProc} {
} {}

    set x
} [list "bbbbbbbbbbbbbbb" 15 "123456789abcdef" 1 4 "abcd" 0 3 "efg"]
test io-6.45 {Tcl_GetsObj: input saw cr, skip right number of bytes} {stdio testchannel openpipe fileevent} {
    # Tcl_ExternalToUtf()

    set f [open "|[list [interpreter] $path(cat)]" w+]
    fconfigure $f -translation {auto lf} -buffering none
    fconfigure $f -encoding utf-16
    puts -nonewline $f "bbbbbbbbbbbbbbb\n123456789abcdef\r"
    fconfigure $f -buffersize 16
    gets $f
    fconfigure $f -blocking 0
    set x [list [gets $f line] $line [testchannel queuedcr $f]]
    fconfigure $f -blocking 1
    puts -nonewline $f "\nabcd\refg"

    puts -nonewline $f "123456789012345\r\nbcdefghijklmnopqrstuvwxyz"
    variable x {}
    fileevent $f read [namespace code "ready $f"]
    proc ready {f} {
	variable x
	lappend x [gets $f line] $line [testchannel inputbuffered $f]
    }
    fconfigure $f -encoding utf-16 -buffersize 16 -blocking 0
    vwait [namespace which -variable x]
    fconfigure $f -translation auto -encoding ascii -blocking 1
    # here
    vwait [namespace which -variable x]
    close $f
    set x
} [list -1 "" 42 15 "123456789012345" 25]

test iocmd-8.6 {fconfigure command} -returnCodes error -body {
    fconfigure stdin -translation froboz
} -result {bad value for -translation: must be one of auto, binary, cr, lf, crlf, or platform}
test iocmd-8.7 {fconfigure command} -setup {
    file delete $path(test1)
} -body {
    set f1 [open $path(test1) w]
    fconfigure $f1 -translation lf -eofchar {} -encoding utf-16
    fconfigure $f1
} -cleanup {
    catch {close $f1}
} -result {-blocking 1 -buffering full -buffersize 4096 -encoding utf-16 -eofchar {} -translation lf}
test iocmd-8.8 {fconfigure command} -setup {
    file delete $path(test1)
    set x {}
} -body {
    set f1 [open $path(test1) w]
    fconfigure $f1 -translation lf -buffering line -buffersize 3030 \
		-eofchar {} -encoding utf-16
    lappend x [fconfigure $f1 -buffering]
    lappend x [fconfigure $f1]
} -cleanup {
    catch {close $f1}
} -result {line {-blocking 1 -buffering line -buffersize 3030 -encoding utf-16 -eofchar {} -translation lf}}
test iocmd-8.9 {fconfigure command} -setup {
    file delete $path(test1)
} -body {
    set f1 [open $path(test1) w]
    fconfigure $f1 -translation binary -buffering none -buffersize 4040 \
		-eofchar {} -encoding binary
    fconfigure $f1

    # and use of the Control-Z character (\u001A) as a cross-platform
    # EOF character by [source].  Here we write out and the [source] a
    # file that contains the byte \x1A, although not the character \u001A in
    # the indicated encoding.
    set sourcefile [makeFile {} source.file]
    file delete $sourcefile
    set f [open $sourcefile w]
    fconfigure $f -encoding utf-16
    puts $f "set symbol(square-root) \u221A; set x correct"
    close $f
} -body {
    set x unset
    source -encoding utf-16 $sourcefile
    set x
} -cleanup {
    removeFile source.file
} -result correct
test source-7.3 {source -encoding: syntax} -body {
    # Have to spell out the -encoding option
    source -e utf-8 no_file