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Minor: Introduce GenericOffset

This commit is contained in:
Behdad Esfahbod 2014-06-27 14:40:35 -04:00
parent 0d1b3419a7
commit 0394ec1bfb
1 changed files with 6 additions and 10 deletions
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16
src/hb-open-type-private.hh
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@ -630,21 +630,17 @@ struct Index : USHORT {
};
DEFINE_NULL_DATA (Index, "\xff\xff");
/* Offset to a table, same as uint16 (length = 16 bits), Null offset = 0x0000 */
struct Offset : USHORT
/* GenericOffset, Null offset = 0 */
template <typename Type>
struct GenericOffset : Type
{
inline bool is_null (void) const { return 0 == *this; }
public:
DEFINE_SIZE_STATIC (2);
DEFINE_SIZE_STATIC (sizeof(Type));
};
/* LongOffset to a table, same as uint32 (length = 32 bits), Null offset = 0x00000000 */
struct LongOffset : ULONG
{
inline bool is_null (void) const { return 0 == *this; }
public:
DEFINE_SIZE_STATIC (4);
};
typedef GenericOffset<USHORT> Offset;
typedef GenericOffset<ULONG> LongOffset;
/* CheckSum */