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Add internal API for buffer var allocation

This commit is contained in:
Behdad Esfahbod 2011-07-25 16:20:16 -04:00
parent 651e8dd79e
commit f4a579bc42
2 changed files with 45 additions and 2 deletions
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25
src/hb-buffer-private.hh
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@ -66,13 +66,15 @@ struct _hb_buffer_t {
unsigned int len; /* Length of ->info and ->pos arrays */
unsigned int out_len; /* Length of ->out array if have_output */
unsigned int serial;
unsigned int allocated; /* Length of allocated arrays */
hb_glyph_info_t *info;
hb_glyph_info_t *out_info;
hb_glyph_position_t *pos;
unsigned int serial;
uint8_t allocated_var_bytes[8];
const char *allocated_var_owner[8];
/* Methods */
@ -82,6 +84,25 @@ struct _hb_buffer_t {
{ return have_output? out_len : idx; }
inline unsigned int next_serial (void) { return serial++; }
HB_INTERNAL void allocate_var (unsigned int byte_i, unsigned int count, const char *owner);
HB_INTERNAL void deallocate_var (unsigned int byte_i, unsigned int count, const char *owner);
inline void allocate_var_8 (unsigned int var_num, unsigned int i, const char *owner)
{ assert (var_num < 2 && i < 4); allocate_var (var_num * 4 + i, 1, owner); }
inline void allocate_var_16 (unsigned int var_num, unsigned int i, const char *owner)
{ assert (var_num < 2 && i < 2); allocate_var (var_num * 4 + i * 2, 2, owner); }
inline void allocate_var_32 (unsigned int var_num, const char *owner)
{ assert (var_num < 2); allocate_var (var_num * 4, 4, owner); }
inline void deallocate_var_8 (unsigned int var_num, unsigned int i, const char *owner)
{ assert (var_num < 2 && i < 4); deallocate_var (var_num * 4 + i, 1, owner); }
inline void deallocate_var_16 (unsigned int var_num, unsigned int i, const char *owner)
{ assert (var_num < 2 && i < 2); deallocate_var (var_num * 4 + i * 2, 2, owner); }
inline void deallocate_var_32 (unsigned int var_num, const char *owner)
{ assert (var_num < 2); deallocate_var (var_num * 4, 4, owner); }
HB_INTERNAL void add (hb_codepoint_t codepoint,
hb_mask_t mask,
unsigned int cluster);

22
src/hb-buffer.cc
View File

@ -153,6 +153,8 @@ hb_buffer_t::reset (void)
out_len = 0;
serial = 0;
memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
memset (allocated_var_owner, 0, sizeof allocated_var_owner);
out_info = info;
}
@ -387,6 +389,26 @@ hb_buffer_t::reverse_clusters (void)
}
void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
{
assert (byte_i < 8 && byte_i + count < 8);
for (unsigned int i = byte_i; i < byte_i + count; i++) {
assert (!allocated_var_bytes[i]);
allocated_var_bytes[i]++;
allocated_var_owner[i] = owner;
}
}
void hb_buffer_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
{
assert (byte_i < 8 && byte_i + count < 8);
for (unsigned int i = byte_i; i < byte_i + count; i++) {
assert (allocated_var_bytes[i] && allocated_var_owner[i] == owner);
allocated_var_bytes[i]--;
}
}
/* Public API */
hb_buffer_t *