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Unified Diff: third_party/harfbuzz/src/harfbuzz-thai.c

Issue 7595001: Update (old) harfbuzz to ToT (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 9 years, 4 months ago
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Index: third_party/harfbuzz/src/harfbuzz-thai.c
diff --git a/third_party/harfbuzz/src/harfbuzz-thai.c b/third_party/harfbuzz/src/harfbuzz-thai.c
index 1d1aa2fcfc0f2bd10aa134d2633d7f43226d7686..e80e2c588018d03e2e95b28002d446d878f84e2a 100644
--- a/third_party/harfbuzz/src/harfbuzz-thai.c
+++ b/third_party/harfbuzz/src/harfbuzz-thai.c
@@ -27,57 +27,81 @@
#include "harfbuzz-external.h"
#include <assert.h>
+#include <stdio.h>
+
+typedef int (*th_brk_def)(const char*, int[], int);
+static th_brk_def th_brk = 0;
+static int libthai_resolved = 0;
+
+static void resolve_libthai()
+{
+ if (!th_brk)
+ th_brk = (th_brk_def)HB_Library_Resolve("thai", 0, "th_brk");
+ libthai_resolved = 1;
+}
+
+static void to_tis620(const HB_UChar16 *string, hb_uint32 len, const char *cstr)
+{
+ hb_uint32 i;
+ unsigned char *result = (unsigned char *)cstr;
+
+ for (i = 0; i < len; ++i) {
+ if (string[i] <= 0xa0)
+ result[i] = (unsigned char)string[i];
+ if (string[i] >= 0xe01 && string[i] <= 0xe5b)
+ result[i] = (unsigned char)(string[i] - 0xe00 + 0xa0);
+ else
+ result[i] = '?';
+ }
+
+ result[len] = 0;
+}
static void thaiWordBreaks(const HB_UChar16 *string, hb_uint32 len, HB_CharAttributes *attributes)
{
- typedef int (*th_brk_def)(const char*, int[], int);
- static void *thaiCodec = 0;
- static th_brk_def th_brk = 0;
- char *cstr = 0;
+ char s[128];
+ char *cstr = s;
int brp[128];
int *break_positions = brp;
hb_uint32 numbreaks;
hb_uint32 i;
- if (!thaiCodec)
- thaiCodec = HB_TextCodecForMib(2259);
-
- /* load libthai dynamically */
- if (!th_brk && thaiCodec) {
- th_brk = (th_brk_def)HB_Library_Resolve("thai", "th_brk");
- if (!th_brk)
- thaiCodec = 0;
- }
+ if (!libthai_resolved)
+ resolve_libthai();
if (!th_brk)
return;
- cstr = HB_TextCodec_ConvertFromUnicode(thaiCodec, string, len, 0);
- if (!cstr)
- return;
+ if (len >= 128)
+ cstr = (char *)malloc(len*sizeof(char) + 1);
+
+ to_tis620(string, len, cstr);
- break_positions = brp;
numbreaks = th_brk(cstr, break_positions, 128);
if (numbreaks > 128) {
break_positions = (int *)malloc(numbreaks * sizeof(int));
numbreaks = th_brk(cstr, break_positions, numbreaks);
}
- for (i = 0; i < len; ++i)
+ for (i = 0; i < len; ++i) {
attributes[i].lineBreakType = HB_NoBreak;
+ attributes[i].wordBoundary = FALSE;
+ }
for (i = 0; i < numbreaks; ++i) {
- if (break_positions[i] > 0)
+ if (break_positions[i] > 0) {
attributes[break_positions[i]-1].lineBreakType = HB_Break;
+ attributes[break_positions[i]-1].wordBoundary = TRUE;
+ }
}
if (break_positions != brp)
free(break_positions);
- HB_TextCodec_FreeResult(cstr);
+ if (len >= 128)
+ free(cstr);
}
-
void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *text, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes)
{
assert(script == HB_Script_Thai);
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