diff options
Diffstat (limited to 'pango/opentype/hb-open-types-private.hh')
| -rw-r--r-- | pango/opentype/hb-open-types-private.hh | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/pango/opentype/hb-open-types-private.hh b/pango/opentype/hb-open-types-private.hh index 9d7894c7..8429179e 100644 --- a/pango/opentype/hb-open-types-private.hh +++ b/pango/opentype/hb-open-types-private.hh @@ -59,9 +59,36 @@ typedef struct _hb_sanitize_context_t hb_sanitize_context_t; struct _hb_sanitize_context_t { const char *start, *end; + int edit_count; hb_blob_t *blob; }; +static HB_GNUC_UNUSED void +hb_sanitize_init (hb_sanitize_context_t *context, + hb_blob_t *blob) +{ + context->blob = blob; + context->start = hb_blob_lock (blob); + context->end = context->start + hb_blob_get_length (blob); + context->edit_count = 0; +} + +static HB_GNUC_UNUSED void +hb_sanitize_fini (hb_sanitize_context_t *context, bool unlock) +{ + if (unlock) + hb_blob_unlock (context->blob); +} + +static HB_GNUC_UNUSED bool +hb_sanitize_edit (hb_sanitize_context_t *context) +{ + bool perm = hb_blob_try_writeable_inplace (context->blob); + if (perm) + context->edit_count++; + return perm; +} + #define SANITIZE_ARG_DEF \ hb_sanitize_context_t *context #define SANITIZE_ARG \ @@ -83,7 +110,7 @@ struct _hb_sanitize_context_t #define SANITIZE_MEM(B,L) HB_LIKELY (context->start <= CONST_CHARP(B) && CONST_CHARP(B) + (L) <= context->end) /* XXX overflow */ -#define NEUTER(Var, Val) (SANITIZE_OBJ (Var) && hb_blob_try_writeable_inplace (context->blob) && ((Var) = (Val), true)) +#define NEUTER(Var, Val) (SANITIZE_OBJ (Var) && hb_sanitize_edit (context) && ((Var) = (Val), true)) /* |