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[cff-common] Optimize INDEX::operator[]

This commit is contained in:
Behdad Esfahbod 2022-05-10 14:25:08 -06:00
parent 52d59bf150
commit 9edb03ac7a
1 changed files with 9 additions and 9 deletions
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18
src/hb-ot-cff-common.hh
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@ -212,14 +212,6 @@ struct CFFIndex
return offset;
}
unsigned int length_at (unsigned int index) const
{
if (unlikely ((offset_at (index + 1) < offset_at (index)) ||
(offset_at (index + 1) > offset_at (count))))
return 0;
return offset_at (index + 1) - offset_at (index);
}
const unsigned char *data_base () const
{ return (const unsigned char *) this + min_size + offSize.static_size + offset_array_size (); }
public:
@ -227,7 +219,15 @@ struct CFFIndex
hb_ubytes_t operator [] (unsigned int index) const
{
if (unlikely (index >= count)) return hb_ubytes_t ();
return hb_ubytes_t (data_base () + offset_at (index) - 1, length_at (index));
unsigned offset1 = offset_at (index);
unsigned offset2 = offset_at (index + 1);
unsigned offsetn = offset_at (count);
if (unlikely (offset2 < offset1 || offset2 > offsetn))
return hb_ubytes_t ();
return hb_ubytes_t (data_base () + offset1 - 1, offset2 - offset1);
}
unsigned int get_size () const