diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/3rdparty/harfbuzz/src/harfbuzz-thai.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c b/src/3rdparty/harfbuzz/src/harfbuzz-thai.c index bf6c35b..3c0ffe8 100644 --- a/src/3rdparty/harfbuzz/src/harfbuzz-thai.c +++ b/src/3rdparty/harfbuzz/src/harfbuzz-thai.c @@ -263,8 +263,13 @@ static HB_Bool HB_ThaiConvertStringToGlyphIndices (HB_ShaperItem *item) // The only glyphs that should be passed to this function that cannot be mapped to // tis620 are the ones of type Inherited class. Pass these glyphs untouched. glyphString[slen++] = string[i]; - if (string[i] == 0x200D || string[i] == 0x200C) - item->attributes[slen-1].dontPrint = true; // Hide ZWJ and ZWNJ characters + if (string[i] == 0x200D || string[i] == 0x200C) { + // Check that we do not run out of bounds when setting item->attributes. If we do + // run out of bounds then this function will return false, the necessary amount of + // memory is reallocated, and this function will then be called again. + if (slen <= item->num_glyphs) + item->attributes[slen-1].dontPrint = true; // Hide ZWJ and ZWNJ characters + } } else { glyphString[slen++] = (HB_UChar16) thai_get_glyph_index (font_type, rglyphs[lgi]); } |