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Make max context-length and max nesting level configurable 

...at compile time.
This commit is contained in:
Behdad Esfahbod 2015-11-02 15:43:08 -08:00
parent 67f8821fb2
commit 5ba450407b
3 changed files with 20 additions and 14 deletions
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10
src/hb-ot-layout-common-private.hh
View File

@ -34,6 +34,14 @@
#include "hb-set-private.hh"
#ifndef HB_MAX_NESTING_LEVEL
#define HB_MAX_NESTING_LEVEL 6
#endif
#ifndef HB_MAX_CONTEXT_LENGTH
#define HB_MAX_CONTEXT_LENGTH 64
#endif
namespace OT {
@ -44,8 +52,6 @@ namespace OT {
#define NOT_COVERED ((unsigned int) -1)
#define MAX_NESTING_LEVEL 6
#define MAX_CONTEXT_LENGTH 64

4
src/hb-ot-layout-gsub-table.hh
View File

@ -630,7 +630,7 @@ struct Ligature
unsigned int total_component_count = 0;
unsigned int match_length = 0;
unsigned int match_positions[MAX_CONTEXT_LENGTH];
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH];
if (likely (!match_input (c, count,
&component[1],
@ -970,7 +970,7 @@ struct ReverseChainSingleSubstFormat1
inline bool apply (hb_apply_context_t *c) const
{
TRACE_APPLY (this);
if (unlikely (c->nesting_level_left != MAX_NESTING_LEVEL))
if (unlikely (c->nesting_level_left != HB_MAX_NESTING_LEVEL))
return_trace (false); /* No chaining to this type */
unsigned int index = (this+coverage).get_coverage (c->buffer->cur().codepoint);

20
src/hb-ot-layout-gsubgpos-private.hh
View File

@ -74,7 +74,7 @@ struct hb_closure_context_t :
hb_closure_context_t (hb_face_t *face_,
hb_set_t *glyphs_,
unsigned int nesting_level_left_ = MAX_NESTING_LEVEL) :
unsigned int nesting_level_left_ = HB_MAX_NESTING_LEVEL) :
face (face_),
glyphs (glyphs_),
recurse_func (NULL),
@ -196,7 +196,7 @@ struct hb_collect_glyphs_context_t :
hb_set_t *glyphs_input, /* OUT. May be NULL */
hb_set_t *glyphs_after, /* OUT. May be NULL */
hb_set_t *glyphs_output, /* OUT. May be NULL */
unsigned int nesting_level_left_ = MAX_NESTING_LEVEL) :
unsigned int nesting_level_left_ = HB_MAX_NESTING_LEVEL) :
face (face_),
before (glyphs_before ? glyphs_before : hb_set_get_empty ()),
input (glyphs_input ? glyphs_input : hb_set_get_empty ()),
@ -483,7 +483,7 @@ struct hb_apply_context_t :
lookup_mask (1),
auto_zwj (true),
recurse_func (NULL),
nesting_level_left (MAX_NESTING_LEVEL),
nesting_level_left (HB_MAX_NESTING_LEVEL),
lookup_props (0),
gdef (*hb_ot_layout_from_face (face)->gdef),
has_glyph_classes (gdef.has_glyph_classes ()),
@ -704,13 +704,13 @@ static inline bool match_input (hb_apply_context_t *c,
match_func_t match_func,
const void *match_data,
unsigned int *end_offset,
unsigned int match_positions[MAX_CONTEXT_LENGTH],
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH],
bool *p_is_mark_ligature = NULL,
unsigned int *p_total_component_count = NULL)
{
TRACE_APPLY (NULL);
if (unlikely (count > MAX_CONTEXT_LENGTH)) return_trace (false);
if (unlikely (count > HB_MAX_CONTEXT_LENGTH)) return_trace (false);
hb_buffer_t *buffer = c->buffer;
@ -784,7 +784,7 @@ static inline bool match_input (hb_apply_context_t *c,
}
static inline bool ligate_input (hb_apply_context_t *c,
unsigned int count, /* Including the first glyph */
unsigned int match_positions[MAX_CONTEXT_LENGTH], /* Including the first glyph */
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH], /* Including the first glyph */
unsigned int match_length,
hb_codepoint_t lig_glyph,
bool is_mark_ligature,
@ -944,7 +944,7 @@ static inline void recurse_lookups (context_t *c,
static inline bool apply_lookup (hb_apply_context_t *c,
unsigned int count, /* Including the first glyph */
unsigned int match_positions[MAX_CONTEXT_LENGTH], /* Including the first glyph */
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH], /* Including the first glyph */
unsigned int lookupCount,
const LookupRecord lookupRecord[], /* Array of LookupRecords--in design order */
unsigned int match_length)
@ -995,7 +995,7 @@ static inline bool apply_lookup (hb_apply_context_t *c,
if (delta > 0)
{
if (unlikely (delta + count > MAX_CONTEXT_LENGTH))
if (unlikely (delta + count > HB_MAX_CONTEXT_LENGTH))
break;
}
else
@ -1094,7 +1094,7 @@ static inline bool context_apply_lookup (hb_apply_context_t *c,
ContextApplyLookupContext &lookup_context)
{
unsigned int match_length = 0;
unsigned int match_positions[MAX_CONTEXT_LENGTH];
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH];
return match_input (c,
inputCount, input,
lookup_context.funcs.match, lookup_context.match_data,
@ -1621,7 +1621,7 @@ static inline bool chain_context_apply_lookup (hb_apply_context_t *c,
ChainContextApplyLookupContext &lookup_context)
{
unsigned int match_length = 0;
unsigned int match_positions[MAX_CONTEXT_LENGTH];
unsigned int match_positions[HB_MAX_CONTEXT_LENGTH];
return match_input (c,
inputCount, input,
lookup_context.funcs.match, lookup_context.match_data[1],