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[aat] Simplify (or not?) SubtableGlyphCoverage.sanitize()

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This commit is contained in:
Behdad Esfahbod 2024-04-11 08:58:49 -06:00
parent d137d55799
commit c053e8f292
1 changed files with 5 additions and 5 deletions
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10
src/hb-aat-layout-common.hh
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@ -709,24 +709,24 @@ struct SubtableGlyphCoverage
{
TRACE_SANITIZE (this);
if (unlikely (!subtableOffsets.sanitize (c, subtable_count)))
if (unlikely (!c->check_array (&subtableOffsets, subtable_count)))
return_trace (false);
unsigned bytes = (c->get_num_glyphs () + CHAR_BIT - 1) / CHAR_BIT;
for (unsigned i = 0; i < subtable_count; i++)
{
uint32_t offset = subtableOffsets[i];
uint32_t offset = (uint32_t) subtableOffsets[i];
if (offset == 0 || offset == 0xFFFFFFFF)
continue;
if (unlikely (!c->check_range (this, offset) ||
!c->check_range (this, offset + bytes)))
if (unlikely (!subtableOffsets[i].sanitize (c, this, bytes)))
return_trace (false);
}
return_trace (true);
}
protected:
UnsizedArrayOf<HBUINT32> subtableOffsets; /* Array of offsets from the beginning of the
UnsizedArrayOf<NNOffset32To<UnsizedArrayOf<HBUINT8>>> subtableOffsets;
/* Array of offsets from the beginning of the
* subtable glyph coverage table to the glyph
* coverage bitfield for a given subtable; there
* is one offset for each subtable in the chain */