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fixed bugs with empty CFFIndex, fullset FDMap

This commit is contained in:
Michiharu Ariza 2018-08-20 14:04:46 -07:00
parent 5cde2f55cd
commit 811a651bbd
1 changed files with 18 additions and 3 deletions
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21
src/hb-ot-cff-common-private.hh
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@ -59,9 +59,10 @@ struct CFFIndex
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) && offSize >= 1 && offSize <= 4 &&
c->check_array (offsets, offSize, count + 1) &&
c->check_array (data_base (), 1, max_offset () - 1)));
return_trace (likely ((count.sanitize (c) && count == 0) || /* empty INDEX */
(c->check_struct (this) && offSize >= 1 && offSize <= 4 &&
c->check_array (offsets, offSize, count + 1) &&
c->check_array (data_base (), 1, max_offset () - 1))));
}
inline static unsigned int calculate_offset_array_size (unsigned int offSize, unsigned int count)
@ -350,6 +351,20 @@ struct FDMap : hb_vector_t<hb_codepoint_t>
inline bool excludes (hb_codepoint_t fd) const
{ return (fd < len) && ((*this)[fd] == HB_SET_VALUE_INVALID); }
inline hb_codepoint_t operator[] (hb_codepoint_t i) const
{
if (fullset ())
return i;
else
return hb_vector_t<hb_codepoint_t>::operator[] (i);
}
inline hb_codepoint_t &operator[] (hb_codepoint_t i)
{
assert (i < len);
return hb_vector_t<hb_codepoint_t>::operator[] (i);
}
};
template <typename COUNT>