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authorhobbs <hobbs>2006-10-05 21:27:43 (GMT)
committerhobbs <hobbs>2006-10-05 21:27:43 (GMT)
commit5c25999ae1a7b55800fc818f52b730e61cd0e39d (patch)
tree55ed022544301bbbddf9f54cbe8e89afb660f0ee /unix
parent79e0492ccc5fa09d42f26d73e401e7d4ecc6a3dd (diff)
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* unix/tkUnixFont.c (Ucs2beToUtfProc, UtfToUcs2beProc):
(TkpFontPkgInit, encodingAliases): Correct alignment issues in encoding conversion. Call ucs-2be "unicode" on big-endian systems. [Bug 1122671]
Diffstat (limited to 'unix')
-rw-r--r--unix/tkUnixFont.c80
1 files changed, 45 insertions, 35 deletions
diff --git a/unix/tkUnixFont.c b/unix/tkUnixFont.c
index 9140023..9174f8e 100644
--- a/unix/tkUnixFont.c
+++ b/unix/tkUnixFont.c
@@ -9,7 +9,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUnixFont.c,v 1.28 2006/04/25 08:18:31 dkf Exp $
+ * RCS: @(#) $Id: tkUnixFont.c,v 1.29 2006/10/05 21:27:43 hobbs Exp $
*/
#include "tkUnixInt.h"
@@ -188,7 +188,14 @@ static EncodingAlias encodingAliases[] = {
{"tis620", "tis620*"},
{"ksc5601", "ksc5601*"},
{"dingbats", "*dingbats"},
+#ifdef WORDS_BIGENDIAN
+ {"unicode", "iso10646-1"},
+#else
+ /*
+ * ucs-2be is needed if native order isn't BE.
+ */
{"ucs-2be", "iso10646-1"},
+#endif
{NULL, NULL}
};
@@ -242,6 +249,7 @@ static unsigned int RankAttributes(FontAttributes *wantPtr,
static void ReleaseFont(UnixFont *fontPtr);
static void ReleaseSubFont(Display *display, SubFont *subFontPtr);
static int SeenName(CONST char *name, Tcl_DString *dsPtr);
+#ifndef WORDS_BIGENDIAN
static int Ucs2beToUtfProc(ClientData clientData,
CONST char *src, int srcLen, int flags,
Tcl_EncodingState *statePtr, char *dst, int dstLen,
@@ -252,6 +260,7 @@ static int UtfToUcs2beProc(ClientData clientData,
Tcl_EncodingState *statePtr, char *dst, int dstLen,
int *srcReadPtr, int *dstWrotePtr,
int *dstCharsPtr);
+#endif
/*
*-------------------------------------------------------------------------
@@ -339,9 +348,10 @@ TkpFontPkgInit(
FontMapInsert(&dummy, i + 0x80);
}
+#ifndef WORDS_BIGENDIAN
/*
- * UCS-2BE is unicode in big-endian format. It is used in iso10646
- * fonts.
+ * UCS-2BE is unicode (UCS-2) in big-endian format. Define this
+ * if native order isn't BE. It is used in iso10646 fonts.
*/
type.encodingName = "ucs-2be";
@@ -351,6 +361,7 @@ TkpFontPkgInit(
type.clientData = NULL;
type.nullSize = 2;
Tcl_CreateEncoding(&type);
+#endif
Tcl_CreateThreadExitHandler(FontPkgCleanup, NULL);
}
}
@@ -446,12 +457,14 @@ ControlUtfProc(
return result;
}
+#ifndef WORDS_BIGENDIAN
/*
*-------------------------------------------------------------------------
*
* Ucs2beToUtfProc --
*
* Convert from UCS-2BE (big-endian 16-bit Unicode) to UTF-8.
+ * This is only defined on LE machines.
*
* Results:
* Returns TCL_OK if conversion was successful.
@@ -489,42 +502,38 @@ Ucs2beToUtfProc(
* correspond to the bytes stored in the
* output buffer. */
{
- CONST Tcl_UniChar *wSrc, *wSrcStart, *wSrcEnd;
+ CONST char *srcStart, *srcEnd;
char *dstEnd, *dstStart;
int result, numChars;
result = TCL_OK;
- if ((srcLen % sizeof(Tcl_UniChar)) != 0) {
+
+ /* check alignment with ucs-2 (2 == sizeof(UCS-2)) */
+ if ((srcLen % 2) != 0) {
result = TCL_CONVERT_MULTIBYTE;
- srcLen /= sizeof(Tcl_UniChar);
- srcLen *= sizeof(Tcl_UniChar);
+ srcLen--;
}
- wSrc = (Tcl_UniChar *) src;
-
- wSrcStart = (Tcl_UniChar *) src;
- wSrcEnd = (Tcl_UniChar *) (src + srcLen);
+ srcStart = src;
+ srcEnd = src + srcLen;
dstStart = dst;
dstEnd = dst + dstLen - TCL_UTF_MAX;
- for (numChars = 0; wSrc < wSrcEnd; numChars++) {
+ for (numChars = 0; src < srcEnd; numChars++) {
if (dst > dstEnd) {
result = TCL_CONVERT_NOSPACE;
break;
}
-
/*
- * On a little-endian machine (Intel) the UCS-2BE is in the wrong
- * byte-order in comparison to "unicode", which is in native host
- * order.
+ * Need to swap byte-order on little-endian machines (x86) for
+ * UCS-2BE. We know this is an LE->BE swap.
*/
-
- dst += Tcl_UniCharToUtf(htons(*wSrc), dst);
- wSrc++;
+ dst += Tcl_UniCharToUtf(htons(*((short *)src)), dst);
+ src += 2 /* sizeof(UCS-2) */;
}
- *srcReadPtr = (char *) wSrc - (char *) wSrcStart;
+ *srcReadPtr = src - srcStart;
*dstWrotePtr = dst - dstStart;
*dstCharsPtr = numChars;
return result;
@@ -535,7 +544,7 @@ Ucs2beToUtfProc(
*
* UtfToUcs2beProc --
*
- * Convert from UTF-8 to UCS-2BE.
+ * Convert from UTF-8 to UCS-2BE (fixed 2-byte encoding).
*
* Results:
* Returns TCL_OK if conversion was successful.
@@ -574,9 +583,9 @@ UtfToUcs2beProc(
* correspond to the bytes stored in the
* output buffer. */
{
- CONST char *srcStart, *srcEnd, *srcClose;
- Tcl_UniChar *wDst, *wDstStart, *wDstEnd;
+ CONST char *srcStart, *srcEnd, *srcClose, *dstStart, *dstEnd;
int result, numChars;
+ Tcl_UniChar ch;
srcStart = src;
srcEnd = src + srcLen;
@@ -585,9 +594,8 @@ UtfToUcs2beProc(
srcClose -= TCL_UTF_MAX;
}
- wDst = (Tcl_UniChar *) dst;
- wDstStart = (Tcl_UniChar *) dst;
- wDstEnd = (Tcl_UniChar *) (dst + dstLen - sizeof(Tcl_UniChar));
+ dstStart = dst;
+ dstEnd = dst + dstLen - 2 /* sizeof(UCS-2) */;
result = TCL_OK;
for (numChars = 0; src < srcEnd; numChars++) {
@@ -600,24 +608,26 @@ UtfToUcs2beProc(
result = TCL_CONVERT_MULTIBYTE;
break;
}
- if (wDst > wDstEnd) {
+ if (dst > dstEnd) {
result = TCL_CONVERT_NOSPACE;
break;
- }
- src += Tcl_UtfToUniChar(src, wDst);
-
+ }
+ src += Tcl_UtfToUniChar(src, &ch);
/*
- * Byte swap for little-endian machines.
+ * Ensure big-endianness (store big bits first).
+ * XXX: This hard-codes the assumed size of Tcl_UniChar as 2.
+ * Make sure to work in char* for Tcl_UtfToUniChar alignment.
+ * [Bug 1122671]
*/
-
- *wDst = htons(*wDst);
- wDst++;
+ *dst++ = (ch >> 8);
+ *dst++ = (ch & 0xFF);
}
*srcReadPtr = src - srcStart;
- *dstWrotePtr = (char *) wDst - (char *) wDstStart;
+ *dstWrotePtr = dst - dstStart;
*dstCharsPtr = numChars;
return result;
}
+#endif /* WORDS_BIGENDIAN */
/*
*---------------------------------------------------------------------------