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[dfon]t Sanitize OpenTypeFontFace

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This commit is contained in:
Behdad Esfahbod 2018-09-13 19:05:59 +02:00
parent 3fba41906f
commit 4479d3a2ed
2 changed files with 9 additions and 18 deletions
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6
src/hb-dsalgs.hh
View File

@ -537,12 +537,6 @@ struct hb_bytes_t
inline void free (void) { ::free ((void *) arrayZ); arrayZ = nullptr; len = 0; }
template <typename Type>
inline const Type* as (void) const
{
return unlikely (!arrayZ) ? &Null(Type) : reinterpret_cast<const Type *> (arrayZ);
}
inline int cmp (const hb_bytes_t &a) const
{
if (len != a.len)

21
src/hb-open-file.hh
View File

@ -293,15 +293,16 @@ struct TTCHeader
struct ResourceRecord
{
inline const hb_bytes_t get_data (const void *data_base) const
{ return hb_bytes_t (data_base+offset); }
inline const OpenTypeFontFace & get_face (const void *data_base) const
{ return CastR<OpenTypeFontFace> ((data_base+offset).arrayZ); }
inline bool sanitize (hb_sanitize_context_t *c,
const void *data_base) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
offset.sanitize (c, data_base));
offset.sanitize (c, data_base) &&
get_face (data_base).sanitize (c));
}
protected:
@ -317,11 +318,13 @@ struct ResourceRecord
DEFINE_SIZE_STATIC (12);
};
#define HB_TAG_sfnt HB_TAG ('s','f','n','t')
struct ResourceTypeRecord
{
inline unsigned int get_resource_count () const { return resCountM1 + 1; }
inline unsigned int get_resource_count () const { return tag == HB_TAG_sfnt ? resCountM1 + 1 : 0; }
inline bool is_sfnt () const { return tag == HB_TAG ('s','f','n','t'); }
inline bool is_sfnt () const { return tag == HB_TAG_sfnt; }
inline const ResourceRecord& get_resource_record (unsigned int i,
const void *type_base) const
@ -409,10 +412,6 @@ struct ResourceForkHeader
return 0;
}
inline const hb_bytes_t get_data (const ResourceTypeRecord& type,
unsigned int idx) const
{ return (this+map).get_resource_record (type, idx).get_data (&(this+data)); }
inline const OpenTypeFontFace& get_face (unsigned int idx,
unsigned int *base_offset = nullptr) const
{
@ -423,7 +422,7 @@ struct ResourceForkHeader
const ResourceTypeRecord& type = resource_map.get_type_record (i);
if (type.is_sfnt () && idx < type.get_resource_count ())
{
const OpenTypeFontFace &face = *get_data (type, idx).as<OpenTypeFontFace> ();
const OpenTypeFontFace &face = resource_map.get_resource_record (type, idx).get_face (&(this+data));
if (base_offset)
*base_offset = (const char *) &face - (const char *) this;
return face;
@ -437,8 +436,6 @@ struct ResourceForkHeader
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
map.sanitize (c, this, &(this+data)));
// XXX Sanitize OpenTypeFontFace's
}
protected: