walkero
/
harfbuzz
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Make all code NULL-free and assert-free

This commit is contained in:
Behdad Esfahbod 2008-01-23 04:36:40 -05:00
parent 600e5eb80f
commit 1f437e6f47
3 changed files with 226 additions and 216 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

125
src/harfbuzz-gdef-private.h
View File

@ -10,22 +10,34 @@ struct GlyphClassDef : ClassDef {
static const uint16_t ComponentGlyph = 0x0004u; static const uint16_t ComponentGlyph = 0x0004u;
}; };
struct AttachPoint; /*
* Attachment List Table
*/
struct AttachPoint {
/* countour point indices, in increasing numerical order */
DEFINE_ARRAY_TYPE (USHORT, pointIndex, pointCount);
private:
USHORT pointCount; /* Number of attachment points on
* this glyph */
USHORT pointIndex[]; /* Array of contour point indices--in
* increasing numerical order */
};
DEFINE_NULL_ASSERT_SIZE (AttachPoint, 2);
struct AttachList { struct AttachList {
/* AttachPoint tables, in Coverage Index order */
/* TODO get attach lists */
/* DEFINE_INDIRECT_OFFSET_ARRAY_TYPE (AttachPoint, attachPoint, glyphCount, get_coverage);
// get_coverage inline const AttachPoint* get_attach_points (uint16_t glyph_id) {
const Coverage &c = get_coverage ();
inline Coverage* get_default_language_system (void) { int c_index = c.get_coverage (glyph_id);
if (!defaultLangSys) return &(*this)[c_index];
return NULL;
return (LangSys *)((char*)this + defaultLangSys);
} }
*/ private:
/* AttachPoint tables, in Coverage Index order */
DEFINE_OFFSET_ARRAY_TYPE (AttachPoint, attachPoint, glyphCount);
DEFINE_ACCESSOR (Coverage, get_coverage, coverage);
private: private:
Offset coverage; /* Offset to Coverage table -- from Offset coverage; /* Offset to Coverage table -- from
@ -36,18 +48,7 @@ struct AttachList {
* tables--from beginning of AttachList * tables--from beginning of AttachList
* table--in Coverage Index order */ * table--in Coverage Index order */
}; };
ASSERT_SIZE (AttachList, 4); DEFINE_NULL_ASSERT_SIZE (AttachList, 4);
struct AttachPoint {
/* TODO */
private:
USHORT pointCount; /* Number of attachment points on
* this glyph */
USHORT pointIndex[]; /* Array of contour point indices--in
* increasing numerical order */
};
ASSERT_SIZE (AttachPoint, 2);
/* /*
* Ligature Caret Table * Ligature Caret Table
@ -67,22 +68,7 @@ struct LigCaretList {
* LigCaretList table--in Coverage * LigCaretList table--in Coverage
* Index order */ * Index order */
}; };
ASSERT_SIZE (LigCaretList, 4); DEFINE_NULL_ASSERT_SIZE (LigCaretList, 4);
struct LigGlyph {
/* Caret value tables, in increasing coordinate order */
DEFINE_OFFSET_ARRAY_TYPE (CaretValue, caretValue, caretCount);
/* TODO */
private:
USHORT caretCount; /* Number of CaretValues for this
* ligature (components - 1) */
Offset caretValue[]; /* Array of offsets to CaretValue
* tables--from beginning of LigGlyph
* table--in increasing coordinate
* order */
};
ASSERT_SIZE (LigGlyph, 2);
struct CaretValueFormat1 { struct CaretValueFormat1 {
@ -94,7 +80,7 @@ struct CaretValueFormat1 {
USHORT caretValueFormat; /* Format identifier--format = 1 */ USHORT caretValueFormat; /* Format identifier--format = 1 */
SHORT coordinate; /* X or Y value, in design units */ SHORT coordinate; /* X or Y value, in design units */
}; };
ASSERT_SIZE (CaretValueFormat1, 4); DEFINE_NULL_ASSERT_SIZE (CaretValueFormat1, 4);
struct CaretValueFormat2 { struct CaretValueFormat2 {
@ -106,16 +92,17 @@ struct CaretValueFormat2 {
USHORT caretValueFormat; /* Format identifier--format = 2 */ USHORT caretValueFormat; /* Format identifier--format = 2 */
USHORT caretValuePoint; /* Contour point index on glyph */ USHORT caretValuePoint; /* Contour point index on glyph */
}; };
ASSERT_SIZE (CaretValueFormat2, 4); DEFINE_NULL_ASSERT_SIZE (CaretValueFormat2, 4);
struct CaretValueFormat3 { struct CaretValueFormat3 {
inline const Device* get_device (void) const { inline const Device& get_device (void) const {
return (const Device*)((const char*)this + deviceTable); if (!deviceTable) return NullDevice;
return *(const Device*)((const char*)this + deviceTable);
} }
inline int get_caret_value (int ppem) const { inline int get_caret_value (int ppem) const {
return /* TODO garbage */ (coordinate + get_device()->get_delta (ppem)) / ppem; return /* TODO garbage */ (coordinate + get_device().get_delta (ppem)) / ppem;
} }
private: private:
@ -125,7 +112,7 @@ struct CaretValueFormat3 {
* value--from beginning of CaretValue * value--from beginning of CaretValue
* table */ * table */
}; };
ASSERT_SIZE (CaretValueFormat3, 6); DEFINE_NULL_ASSERT_SIZE (CaretValueFormat3, 6);
struct CaretValue { struct CaretValue {
DEFINE_NON_INSTANTIABLE(CaretValue); DEFINE_NON_INSTANTIABLE(CaretValue);
@ -158,16 +145,26 @@ struct CaretValue {
/* FIXME old HarfBuzz code has a format 4 here! */ /* FIXME old HarfBuzz code has a format 4 here! */
} u; } u;
}; };
DEFINE_NULL (CaretValue, 2);
struct LigGlyph {
/* Caret value tables, in increasing coordinate order */
DEFINE_OFFSET_ARRAY_TYPE (CaretValue, caretValue, caretCount);
/* TODO */
#define DEFINE_ACCESSOR0(const, Type, name, Name) \ private:
inline const Type* name (void) const { \ USHORT caretCount; /* Number of CaretValues for this
if (!Name) return NULL; \ * ligature (components - 1) */
return (const Type *)((const char*)this + Name); \ Offset caretValue[]; /* Array of offsets to CaretValue
} * tables--from beginning of LigGlyph
#define DEFINE_ACCESSOR(Type, name, Name) \ * table--in increasing coordinate
DEFINE_ACCESSOR0(const, Type, name, Name) \ * order */
DEFINE_ACCESSOR0( , Type, name, Name) };
DEFINE_NULL_ASSERT_SIZE (LigGlyph, 2);
/*
* GDEF Header
*/
struct GDEFHeader { struct GDEFHeader {
static const hb_tag_t GDEFTag = HB_TAG ('G','D','E','F'); static const hb_tag_t GDEFTag = HB_TAG ('G','D','E','F');
@ -181,18 +178,18 @@ struct GDEFHeader {
/* Returns 0 if not found. */ /* Returns 0 if not found. */
inline int get_glyph_class (uint16_t glyph_id) const { inline int get_glyph_class (uint16_t glyph_id) const {
const ClassDef *class_def = get_glyph_class_def (); const ClassDef &class_def = get_glyph_class_def ();
if (!class_def) return 0; return class_def.get_class (glyph_id);
return class_def->get_class (glyph_id);
} }
/* Returns 0 if not found. */ /* Returns 0 if not found. */
inline int get_mark_attachment_type (uint16_t glyph_id) const { inline int get_mark_attachment_type (uint16_t glyph_id) const {
const ClassDef *class_def = get_mark_attach_class_def (); const ClassDef &class_def = get_mark_attach_class_def ();
if (!class_def) return 0; return class_def.get_class (glyph_id);
return class_def->get_class (glyph_id);
} }
/* TODO get_glyph_property */
/* TODO get_attach and get_lig_caret */ /* TODO get_attach and get_lig_caret */
private: private:
@ -200,17 +197,17 @@ struct GDEFHeader {
* 0x00010000 */ * 0x00010000 */
Offset glyphClassDef; /* Offset to class definition table Offset glyphClassDef; /* Offset to class definition table
* for glyph type--from beginning of * for glyph type--from beginning of
* GDEF header (may be NULL) */ * GDEF header (may be Null) */
Offset attachList; /* Offset to list of glyphs with Offset attachList; /* Offset to list of glyphs with
* attachment points--from beginning * attachment points--from beginning
* of GDEF header (may be NULL) */ * of GDEF header (may be Null) */
Offset ligCaretList; /* Offset to list of positioning points Offset ligCaretList; /* Offset to list of positioning points
* for ligature carets--from beginning * for ligature carets--from beginning
* of GDEF header (may be NULL) */ * of GDEF header (may be Null) */
Offset markAttachClassDef; /* Offset to class definition table for Offset markAttachClassDef; /* Offset to class definition table for
* mark attachment type--from beginning * mark attachment type--from beginning
* of GDEF header (may be NULL) */ * of GDEF header (may be Null) */
}; };
ASSERT_SIZE (GDEFHeader, 12); DEFINE_NULL_ASSERT_SIZE (GDEFHeader, 12);
#endif /* HARFBUZZ_GDEF_PRIVATE_H */ #endif /* HARFBUZZ_GDEF_PRIVATE_H */

309
src/harfbuzz-open-private.h
View File

@ -53,12 +53,11 @@
* as its last item. An array object is extended with len() and size() * as its last item. An array object is extended with len() and size()
* methods, as well as overloaded [] operator. */ * methods, as well as overloaded [] operator. */
#define DEFINE_ARRAY_TYPE(Type, array, num) \ #define DEFINE_ARRAY_TYPE(Type, array, num) \
DEFINE_INDEX_OPERATOR(const, Type, array, num) \ DEFINE_INDEX_OPERATOR(Type, array, num) \
DEFINE_INDEX_OPERATOR( , Type, array, num) \
DEFINE_LEN_AND_SIZE(Type, array, num) DEFINE_LEN_AND_SIZE(Type, array, num)
#define DEFINE_INDEX_OPERATOR(const, Type, array, num) \ #define DEFINE_INDEX_OPERATOR(Type, array, num) \
inline const Type& operator[] (unsigned int i) const { \ inline const Type& operator[] (unsigned int i) const { \
assert (i < num); \ if (i >= num) return Null##Type; \
return array[i]; \ return array[i]; \
} }
@ -66,34 +65,42 @@
* of offsets to the objects, relative to the beginning of the current * of offsets to the objects, relative to the beginning of the current
* object. */ * object. */
#define DEFINE_OFFSET_ARRAY_TYPE(Type, array, num) \ #define DEFINE_OFFSET_ARRAY_TYPE(Type, array, num) \
DEFINE_OFFSET_INDEX_OPERATOR(const, Type, array, num) \ DEFINE_OFFSET_INDEX_OPERATOR(Type, array, num) \
DEFINE_OFFSET_INDEX_OPERATOR( , Type, array, num) \
DEFINE_LEN_AND_SIZE(Offset, array, num) DEFINE_LEN_AND_SIZE(Offset, array, num)
#define DEFINE_OFFSET_INDEX_OPERATOR(const, Type, array, num) \ #define DEFINE_OFFSET_INDEX_OPERATOR(Type, array, num) \
inline const Type& operator[] (unsigned int i) const { \ inline const Type& operator[] (unsigned int i) const { \
assert (i < num); \ if (i >= num) return Null##Type; \
assert (array[i]); /* TODO: should just skip them */ \ if (!array[i]) return Null##Type; \
return *(const Type *)((const char*)this + array[i]); \ return *(const Type *)((const char*)this + array[i]); \
} }
#define DEFINE_RECORD_ARRAY_TYPE(Type, array, num) \ #define DEFINE_RECORD_ARRAY_TYPE(Type, array, num) \
DEFINE_RECORD_ACCESSOR(const, Type, array, num) \ DEFINE_RECORD_ACCESSOR(Type, array, num) \
DEFINE_RECORD_ACCESSOR( , Type, array, num) \
DEFINE_LEN_AND_SIZE(Record, array, num) DEFINE_LEN_AND_SIZE(Record, array, num)
#define DEFINE_RECORD_ACCESSOR(const, Type, array, num) \ #define DEFINE_RECORD_ACCESSOR(Type, array, num) \
inline const Type& operator[] (unsigned int i) const { \ inline const Type& operator[] (unsigned int i) const { \
assert (i < num); \ if (i >= num) return Null##Type; \
assert (array[i].offset); /* TODO: should just skip them */ \ if (!array[i].offset) return Null##Type; \
return *(const Type *)((const char*)this + array[i].offset); \ return *(const Type *)((const char*)this + array[i].offset); \
} \ } \
inline const Tag& get_tag (unsigned int i) const { \ inline const Tag& get_tag (unsigned int i) const { \
assert (i < num); \ if (i >= num) return NullTag; \
return array[i].tag; \ return array[i].tag; \
} \ } \
/* TODO: implement find_tag() */ /* TODO: implement find_tag() */
/*
* List types
*/
#define DEFINE_LIST_ACCESSOR(Type, name) \
inline const Type##List& get_##name##_list (void) const { \
if (!name##List) return Null##Type##List; \
return *(const Type##List *)((const char*)this + name##List); \
} \
inline const Type& get_##name (unsigned int i) const { \
return get_##name##_list()[i]; \
}
/* /*
* Class features * Class features
@ -105,6 +112,20 @@
private: inline Type() {} /* cannot be instantiated */ \ private: inline Type() {} /* cannot be instantiated */ \
public: public:
/* defines Null##Type as a safe nil instance of Type */
#define DEFINE_NULL_DATA(Type, size, data) \
static const unsigned char Null##Type##Data[size] = data; \
DEFINE_NULL_ALIAS (Type, Type)
#define DEFINE_NULL(Type, size) \
DEFINE_NULL_DATA(Type, size, "")
#define DEFINE_NULL_ASSERT_SIZE(Type, size) \
DEFINE_NULL_ASSERT_SIZE_DATA(Type, size, "")
#define DEFINE_NULL_ASSERT_SIZE_DATA(Type, size, data) \
ASSERT_SIZE (Type, size); \
DEFINE_NULL_DATA (Type, size, data)
#define DEFINE_NULL_ALIAS(NewType, OldType) \
static const NewType &Null##NewType = *(NewType *)Null##OldType##Data
/* get_for_data() is a static class method returning a reference to an /* get_for_data() is a static class method returning a reference to an
* instance of Type located at the input data location. It's just a * instance of Type located at the input data location. It's just a
* fancy cast! */ * fancy cast! */
@ -117,6 +138,13 @@
STATIC_DEFINE_GET_FOR_DATA0( , Type) STATIC_DEFINE_GET_FOR_DATA0( , Type)
#define DEFINE_ACCESSOR(Type, name, Name) \
inline const Type& name (void) const { \
if (!Name) return Null##Type; \
return *(const Type*)((const char*)this + Name); \
}
/* /*
* *
@ -136,17 +164,17 @@
DEFINE_INT_TYPE_STRUCT (BYTE, u, 8); /* 8-bit unsigned integer. */ DEFINE_INT_TYPE_STRUCT (BYTE, u, 8); /* 8-bit unsigned integer. */
ASSERT_SIZE (BYTE, 1); DEFINE_NULL_ASSERT_SIZE (BYTE, 1);
DEFINE_INT_TYPE_STRUCT (CHAR, , 8); /* 8-bit signed integer. */ DEFINE_INT_TYPE_STRUCT (CHAR, , 8); /* 8-bit signed integer. */
ASSERT_SIZE (CHAR, 1); DEFINE_NULL_ASSERT_SIZE (CHAR, 1);
DEFINE_INT_TYPE_STRUCT (USHORT, u, 16); /* 16-bit unsigned integer. */ DEFINE_INT_TYPE_STRUCT (USHORT, u, 16); /* 16-bit unsigned integer. */
ASSERT_SIZE (USHORT, 2); DEFINE_NULL_ASSERT_SIZE (USHORT, 2);
DEFINE_INT_TYPE_STRUCT (SHORT, , 16); /* 16-bit signed integer. */ DEFINE_INT_TYPE_STRUCT (SHORT, , 16); /* 16-bit signed integer. */
ASSERT_SIZE (SHORT, 2); DEFINE_NULL_ASSERT_SIZE (SHORT, 2);
DEFINE_INT_TYPE_STRUCT (ULONG, u, 32); /* 32-bit unsigned integer. */ DEFINE_INT_TYPE_STRUCT (ULONG, u, 32); /* 32-bit unsigned integer. */
ASSERT_SIZE (ULONG, 4); DEFINE_NULL_ASSERT_SIZE (ULONG, 4);
DEFINE_INT_TYPE_STRUCT (LONG, , 32); /* 32-bit signed integer. */ DEFINE_INT_TYPE_STRUCT (LONG, , 32); /* 32-bit signed integer. */
ASSERT_SIZE (LONG, 4); DEFINE_NULL_ASSERT_SIZE (LONG, 4);
/* Date represented in number of seconds since 12:00 midnight, January 1, /* Date represented in number of seconds since 12:00 midnight, January 1,
* 1904. The value is represented as a signed 64-bit integer. */ * 1904. The value is represented as a signed 64-bit integer. */
@ -166,7 +194,7 @@ struct Fixed {
SHORT i; SHORT i;
USHORT f; USHORT f;
}; };
ASSERT_SIZE (Fixed, 4); DEFINE_NULL_ASSERT_SIZE (Fixed, 4);
/* Smallest measurable distance in the em space. */ /* Smallest measurable distance in the em space. */
struct FUNIT; struct FUNIT;
@ -174,18 +202,18 @@ struct FUNIT;
/* 16-bit signed integer (SHORT) that describes a quantity in FUnits. */ /* 16-bit signed integer (SHORT) that describes a quantity in FUnits. */
struct FWORD : SHORT { struct FWORD : SHORT {
}; };
ASSERT_SIZE (FWORD, 2); DEFINE_NULL_ASSERT_SIZE (FWORD, 2);
/* 16-bit unsigned integer (USHORT) that describes a quantity in FUnits. */ /* 16-bit unsigned integer (USHORT) that describes a quantity in FUnits. */
struct UFWORD : USHORT { struct UFWORD : USHORT {
}; };
ASSERT_SIZE (UFWORD, 2); DEFINE_NULL_ASSERT_SIZE (UFWORD, 2);
/* 16-bit signed fixed number with the low 14 bits of fraction (2.14). */ /* 16-bit signed fixed number with the low 14 bits of fraction (2.14). */
struct F2DOT14 : SHORT { struct F2DOT14 : SHORT {
inline operator double() const { return (uint32_t) this / 16384.; } inline operator double() const { return (uint32_t) this / 16384.; }
}; };
ASSERT_SIZE (F2DOT14, 2); DEFINE_NULL_ASSERT_SIZE (F2DOT14, 2);
/* Array of four uint8s (length = 32 bits) used to identify a script, language /* Array of four uint8s (length = 32 bits) used to identify a script, language
* system, feature, or baseline */ * system, feature, or baseline */
@ -205,14 +233,15 @@ struct Tag {
char v[4]; char v[4];
}; };
ASSERT_SIZE (Tag, 4); ASSERT_SIZE (Tag, 4);
DEFINE_NULL_DATA (Tag, 5, " ");
/* Glyph index number, same as uint16 (length = 16 bits) */ /* Glyph index number, same as uint16 (length = 16 bits) */
DEFINE_INT_TYPE_STRUCT (GlyphID, u, 16); DEFINE_INT_TYPE_STRUCT (GlyphID, u, 16);
ASSERT_SIZE (GlyphID, 2); DEFINE_NULL_ASSERT_SIZE (GlyphID, 2);
/* Offset to a table, same as uint16 (length = 16 bits), NULL offset = 0x0000 */ /* Offset to a table, same as uint16 (length = 16 bits), Null offset = 0x0000 */
DEFINE_INT_TYPE_STRUCT (Offset, u, 16); DEFINE_INT_TYPE_STRUCT (Offset, u, 16);
ASSERT_SIZE (Offset, 2); DEFINE_NULL_ASSERT_SIZE (Offset, 2);
/* CheckSum */ /* CheckSum */
struct CheckSum : ULONG { struct CheckSum : ULONG {
@ -225,7 +254,7 @@ struct CheckSum : ULONG {
return Sum; return Sum;
} }
}; };
ASSERT_SIZE (CheckSum, 4); DEFINE_NULL_ASSERT_SIZE (CheckSum, 4);
/* /*
@ -234,13 +263,13 @@ ASSERT_SIZE (CheckSum, 4);
struct USHORT_Version : USHORT { struct USHORT_Version : USHORT {
}; };
ASSERT_SIZE (USHORT_Version, 2); DEFINE_NULL_ASSERT_SIZE (USHORT_Version, 2);
struct Fixed_Version : Fixed { struct Fixed_Version : Fixed {
inline int16_t major (void) const { return this->int_part(); } inline int16_t major (void) const { return this->int_part(); }
inline int16_t minor (void) const { return this->frac_part(); } inline int16_t minor (void) const { return this->frac_part(); }
}; };
ASSERT_SIZE (Fixed_Version, 4); DEFINE_NULL_ASSERT_SIZE (Fixed_Version, 4);
/* /*
@ -267,7 +296,7 @@ typedef struct TableDirectory {
* file. */ * file. */
ULONG length; /* Length of this table. */ ULONG length; /* Length of this table. */
} OpenTypeTable; } OpenTypeTable;
ASSERT_SIZE (TableDirectory, 16); DEFINE_NULL_ASSERT_SIZE (TableDirectory, 16);
typedef struct OffsetTable { typedef struct OffsetTable {
/* OpenTypeTables, in no particular order */ /* OpenTypeTables, in no particular order */
@ -282,7 +311,8 @@ typedef struct OffsetTable {
USHORT rangeShift; /* NumTables x 16-searchRange. */ USHORT rangeShift; /* NumTables x 16-searchRange. */
TableDirectory tableDir[]; /* TableDirectory entries. numTables items */ TableDirectory tableDir[]; /* TableDirectory entries. numTables items */
} OpenTypeFontFace; } OpenTypeFontFace;
ASSERT_SIZE (OffsetTable, 12); DEFINE_NULL_ASSERT_SIZE (OffsetTable, 12);
DEFINE_NULL_ALIAS (OpenTypeFontFace, OffsetTable);
/* /*
* TrueType Collections * TrueType Collections
@ -300,7 +330,7 @@ struct TTCHeader {
ULONG offsetTable[]; /* Array of offsets to the OffsetTable for each font ULONG offsetTable[]; /* Array of offsets to the OffsetTable for each font
* from the beginning of the file */ * from the beginning of the file */
}; };
ASSERT_SIZE (TTCHeader, 12); DEFINE_NULL_ASSERT_SIZE (TTCHeader, 12);
/* /*
@ -338,25 +368,18 @@ struct OpenTypeFontFile {
} }
} }
inline const OpenTypeFontFace& operator[] (unsigned int i) const { inline const OpenTypeFontFace& operator[] (unsigned int i) const {
assert (i < get_len ()); if (i >= get_len ()) return NullOpenTypeFontFace;
switch (tag) { switch (tag) {
default: case TrueTypeTag: case CFFTag: return (const OffsetTable&)*this; default: case TrueTypeTag: case CFFTag: return (const OffsetTable&)*this;
case TTCTag: return ((const TTCHeader&)*this)[i]; case TTCTag: return ((const TTCHeader&)*this)[i];
} }
} }
inline OpenTypeFontFace& operator[] (unsigned int i) {
assert (i < get_len ());
switch (tag) {
default: case TrueTypeTag: case CFFTag: return (OffsetTable&)*this;
case TTCTag: return ((TTCHeader&)*this)[i];
}
}
inline const Tag& get_tag (void) const { return tag; } inline const Tag& get_tag (void) const { return tag; }
private: private:
Tag tag; /* 4-byte identifier. */ Tag tag; /* 4-byte identifier. */
}; };
ASSERT_SIZE (OpenTypeFontFile, 4); DEFINE_NULL_ASSERT_SIZE (OpenTypeFontFile, 4);
@ -370,59 +393,12 @@ ASSERT_SIZE (OpenTypeFontFile, 4);
* Script, ScriptList, LangSys, Feature, FeatureList, Lookup, LookupList * Script, ScriptList, LangSys, Feature, FeatureList, Lookup, LookupList
*/ */
struct Script;
struct ScriptList;
struct LangSys;
struct Feature;
struct FeatureList;
struct Lookup;
struct LookupList;
typedef struct Record { typedef struct Record {
Tag tag; /* 4-byte Tag identifier */ Tag tag; /* 4-byte Tag identifier */
Offset offset; /* Offset from beginning of object holding Offset offset; /* Offset from beginning of object holding
* the Record */ * the Record */
} ScriptRecord, LangSysRecord, FeatureRecord; } ScriptRecord, LangSysRecord, FeatureRecord;
ASSERT_SIZE (Record, 6); DEFINE_NULL_ASSERT_SIZE (Record, 6);
struct ScriptList {
/* Scripts, in sorted alphabetical tag order */
DEFINE_RECORD_ARRAY_TYPE (Script, scriptRecord, scriptCount);
private:
USHORT scriptCount; /* Number of ScriptRecords */
ScriptRecord scriptRecord[]; /* Array of ScriptRecords--listed alphabetically
* by ScriptTag */
};
ASSERT_SIZE (ScriptList, 2);
struct Script {
/* LangSys', in sorted alphabetical tag order */
DEFINE_RECORD_ARRAY_TYPE (LangSys, langSysRecord, langSysCount);
/* Return NULL if none */
inline const LangSys* get_default_language_system (void) const {
if (!defaultLangSys)
return NULL;
return (const LangSys *)((const char*)this + defaultLangSys);
}
inline LangSys* get_default_language_system (void) {
if (!defaultLangSys)
return NULL;
return (LangSys *)((char*)this + defaultLangSys);
}
/* TODO implement find_language_system based on find_tag */
private:
Offset defaultLangSys; /* Offset to DefaultLangSys table--from
* beginning of Script table--may be NULL */
USHORT langSysCount; /* Number of LangSysRecords for this script--
* excluding the DefaultLangSys */
LangSysRecord langSysRecord[];/* Array of LangSysRecords--listed
* alphabetically by LangSysTag */
};
ASSERT_SIZE (Script, 4);
struct LangSys { struct LangSys {
/* Feature indices, in no particular order */ /* Feature indices, in no particular order */
@ -438,7 +414,7 @@ struct LangSys {
/* TODO implement find_feature */ /* TODO implement find_feature */
private: private:
Offset lookupOrder; /* = NULL (reserved for an offset to a Offset lookupOrder; /* = Null (reserved for an offset to a
* reordering table) */ * reordering table) */
USHORT reqFeatureIndex;/* Index of a feature required for this USHORT reqFeatureIndex;/* Index of a feature required for this
* language system--if no required features * language system--if no required features
@ -449,7 +425,60 @@ struct LangSys {
USHORT featureIndex[]; /* Array of indices into the FeatureList--in USHORT featureIndex[]; /* Array of indices into the FeatureList--in
* arbitrary order. featureCount entires long */ * arbitrary order. featureCount entires long */
}; };
ASSERT_SIZE (LangSys, 6); DEFINE_NULL_ASSERT_SIZE_DATA (LangSys, 6, "\0\0\xFF\xFF");
struct Script {
/* LangSys', in sorted alphabetical tag order */
DEFINE_RECORD_ARRAY_TYPE (LangSys, langSysRecord, langSysCount);
inline const bool has_default_language_system (void) const {
return defaultLangSys != 0;
}
inline const LangSys& get_default_language_system (void) const {
if (!defaultLangSys)
return NullLangSys;
return *(LangSys*)((const char*)this + defaultLangSys);
}
/* TODO implement find_language_system based on find_tag */
private:
Offset defaultLangSys; /* Offset to DefaultLangSys table--from
* beginning of Script table--may be Null */
USHORT langSysCount; /* Number of LangSysRecords for this script--
* excluding the DefaultLangSys */
LangSysRecord langSysRecord[];/* Array of LangSysRecords--listed
* alphabetically by LangSysTag */
};
DEFINE_NULL_ASSERT_SIZE (Script, 4);
struct ScriptList {
/* Scripts, in sorted alphabetical tag order */
DEFINE_RECORD_ARRAY_TYPE (Script, scriptRecord, scriptCount);
private:
USHORT scriptCount; /* Number of ScriptRecords */
ScriptRecord scriptRecord[]; /* Array of ScriptRecords--listed alphabetically
* by ScriptTag */
};
DEFINE_NULL_ASSERT_SIZE (ScriptList, 2);
struct Feature {
/* LookupList indices, in no particular order */
DEFINE_ARRAY_TYPE (USHORT, lookupIndex, lookupCount);
private:
Offset featureParams; /* Offset to Feature Parameters table (if one
* has been defined for the feature), relative
* to the beginning of the Feature Table; = Null
* if not required */
USHORT lookupCount; /* Number of LookupList indices for this
* feature */
USHORT lookupIndex[]; /* Array of LookupList indices for this
* feature--zero-based (first lookup is
* LookupListIndex = 0) */
};
DEFINE_NULL_ASSERT_SIZE (Feature, 4);
struct FeatureList { struct FeatureList {
/* Feature indices, in sorted alphabetical tag order */ /* Feature indices, in sorted alphabetical tag order */
@ -461,38 +490,7 @@ struct FeatureList {
* feature has FeatureIndex = 0)--listed * feature has FeatureIndex = 0)--listed
* alphabetically by FeatureTag */ * alphabetically by FeatureTag */
}; };
ASSERT_SIZE (FeatureList, 2); DEFINE_NULL_ASSERT_SIZE (FeatureList, 2);
struct Feature {
/* LookupList indices, in no particular order */
DEFINE_ARRAY_TYPE (USHORT, lookupIndex, lookupCount);
// TODO: implement get_feature_params()
private:
Offset featureParams; /* Offset to Feature Parameters table (if one
* has been defined for the feature), relative
* to the beginning of the Feature Table; = NULL
* if not required */
USHORT lookupCount; /* Number of LookupList indices for this
* feature */
USHORT lookupIndex[]; /* Array of LookupList indices for this
* feature--zero-based (first lookup is
* LookupListIndex = 0) */
};
ASSERT_SIZE (Feature, 4);
struct LookupList {
/* Lookup indices, in sorted alphabetical tag order */
DEFINE_OFFSET_ARRAY_TYPE (Lookup, lookupOffset, lookupCount);
private:
USHORT lookupCount; /* Number of lookups in this table */
Offset lookupOffset[]; /* Array of offsets to Lookup tables--from
* beginning of LookupList--zero based (first
* lookup is Lookup index = 0) */
};
ASSERT_SIZE (LookupList, 2);
struct LookupFlag : USHORT { struct LookupFlag : USHORT {
static const uint16_t RightToLeft = 0x0001u; static const uint16_t RightToLeft = 0x0001u;
@ -502,11 +500,20 @@ struct LookupFlag : USHORT {
static const uint16_t Reserved = 0x00F0u; static const uint16_t Reserved = 0x00F0u;
static const uint16_t MarkAttachmentType = 0xFF00u; static const uint16_t MarkAttachmentType = 0xFF00u;
}; };
ASSERT_SIZE (LookupFlag, 2); DEFINE_NULL_ASSERT_SIZE (LookupFlag, 2);
struct LookupSubTable {
DEFINE_NON_INSTANTIABLE(LookupSubTable);
private:
USHORT format; /* Subtable format. Different for GSUB and GPOS */
};
DEFINE_NULL_ASSERT_SIZE (LookupSubTable, 2);
struct Lookup { struct Lookup {
/* SubTables, in the desired order */ /* SubTables, in the desired order */
DEFINE_OFFSET_ARRAY_TYPE (char*, subTableOffset, subTableCount); DEFINE_OFFSET_ARRAY_TYPE (LookupSubTable, subTableOffset, subTableCount);
inline bool is_right_to_left (void) const { return lookupFlag & LookupFlag::RightToLeft; } inline bool is_right_to_left (void) const { return lookupFlag & LookupFlag::RightToLeft; }
inline bool ignore_base_glyphs(void) const { return lookupFlag & LookupFlag::IgnoreBaseGlyphs; } inline bool ignore_base_glyphs(void) const { return lookupFlag & LookupFlag::IgnoreBaseGlyphs; }
@ -524,7 +531,19 @@ struct Lookup {
Offset subTableOffset[];/* Array of offsets to SubTables-from Offset subTableOffset[];/* Array of offsets to SubTables-from
* beginning of Lookup table */ * beginning of Lookup table */
}; };
ASSERT_SIZE (Lookup, 6); DEFINE_NULL_ASSERT_SIZE (Lookup, 6);
struct LookupList {
/* Lookup indices, in sorted alphabetical tag order */
DEFINE_OFFSET_ARRAY_TYPE (Lookup, lookupOffset, lookupCount);
private:
USHORT lookupCount; /* Number of lookups in this table */
Offset lookupOffset[]; /* Array of offsets to Lookup tables--from
* beginning of LookupList--zero based (first
* lookup is Lookup index = 0) */
};
DEFINE_NULL_ASSERT_SIZE (LookupList, 2);
/* /*
* Coverage Table * Coverage Table
@ -565,7 +584,7 @@ struct CoverageRangeRecord {
USHORT startCoverageIndex; /* Coverage Index of first GlyphID in USHORT startCoverageIndex; /* Coverage Index of first GlyphID in
* range */ * range */
}; };
ASSERT_SIZE (CoverageRangeRecord, 6); DEFINE_NULL_ASSERT_SIZE_DATA (CoverageRangeRecord, 6, "\001");
struct CoverageFormat2 { struct CoverageFormat2 {
/* CoverageRangeRecords, in sorted numerical start order */ /* CoverageRangeRecords, in sorted numerical start order */
@ -617,6 +636,7 @@ struct Coverage {
CoverageFormat2 format2; CoverageFormat2 format2;
} u; } u;
}; };
DEFINE_NULL (Coverage, 2);
/* /*
* Class Definition Table * Class Definition Table
@ -653,7 +673,7 @@ struct ClassRangeRecord {
GlyphID end; /* Last GlyphID in the range */ GlyphID end; /* Last GlyphID in the range */
USHORT classValue; /* Applied to all glyphs in the range */ USHORT classValue; /* Applied to all glyphs in the range */
}; };
ASSERT_SIZE (ClassRangeRecord, 6); DEFINE_NULL_ASSERT_SIZE_DATA (ClassRangeRecord, 6, "\001");
struct ClassDefFormat2 { struct ClassDefFormat2 {
/* ClassRangeRecords, in sorted numerical start order */ /* ClassRangeRecords, in sorted numerical start order */
@ -704,6 +724,7 @@ struct ClassDef {
ClassDefFormat2 format2; ClassDefFormat2 format2;
} u; } u;
}; };
DEFINE_NULL (ClassDef, 2);
/* /*
* Device Tables * Device Tables
@ -748,23 +769,13 @@ struct Device {
USHORT deltaFormat; /* Format of DeltaValue array data: 1, 2, or 3 */ USHORT deltaFormat; /* Format of DeltaValue array data: 1, 2, or 3 */
USHORT deltaValue[]; /* Array of compressed data */ USHORT deltaValue[]; /* Array of compressed data */
}; };
ASSERT_SIZE (Device, 6); DEFINE_NULL_ASSERT_SIZE (Device, 6);
/*
* GSUB/GPOS Header
*/
typedef struct GSUBGPOSHeader {
#define DEFINE_LIST_ACCESSOR0(const, Type, name) \
inline const Type##List* get_##name##_list (void) const { \
assert (name##List); \
return (const Type##List *)((const char*)this + name##List); \
} \
inline const Type& get_##name (unsigned int i) const { \
return (*get_##name##_list())[i]; \
}
#define DEFINE_LIST_ACCESSOR(Type, name) \
DEFINE_LIST_ACCESSOR0(const, Type, name) \
DEFINE_LIST_ACCESSOR0( , Type, name)
struct GSUBGPOSHeader {
static const hb_tag_t GSUBTag = HB_TAG ('G','S','U','B'); static const hb_tag_t GSUBTag = HB_TAG ('G','S','U','B');
static const hb_tag_t GPOSTag = HB_TAG ('G','P','O','S'); static const hb_tag_t GPOSTag = HB_TAG ('G','P','O','S');
@ -785,7 +796,9 @@ struct GSUBGPOSHeader {
* GSUB/GPOS table */ * GSUB/GPOS table */
Offset lookupList; /* Offset to LookupList table--from beginning of Offset lookupList; /* Offset to LookupList table--from beginning of
* GSUB/GPOS table */ * GSUB/GPOS table */
}; } GSUBHeader, GPOSHeader;
ASSERT_SIZE (GSUBGPOSHeader, 10); DEFINE_NULL_ASSERT_SIZE (GSUBGPOSHeader, 10);
DEFINE_NULL_ALIAS (GSUBHeader, GSUBGPOSHeader);
DEFINE_NULL_ALIAS (GPOSHeader, GSUBGPOSHeader);
#endif /* HARFBUZZ_OPEN_PRIVATE_H */ #endif /* HARFBUZZ_OPEN_PRIVATE_H */

8
src/main.cc
View File

@ -51,7 +51,7 @@ main (int argc, char **argv)
if (table.get_tag() == "GSUB" || table.get_tag() == "GPOS") { if (table.get_tag() == "GSUB" || table.get_tag() == "GPOS") {
const GSUBGPOSHeader &g = GSUBGPOSHeader::get_for_data (ot[table]); const GSUBGPOSHeader &g = GSUBGPOSHeader::get_for_data (ot[table]);
const ScriptList &scripts = *g.get_script_list(); const ScriptList &scripts = g.get_script_list();
int num_scripts = scripts.get_len (); int num_scripts = scripts.get_len ();
printf (" %d script(s) found in table\n", num_scripts); printf (" %d script(s) found in table\n", num_scripts);
for (int n_script = 0; n_script < num_scripts; n_script++) { for (int n_script = 0; n_script < num_scripts; n_script++) {
@ -59,7 +59,7 @@ main (int argc, char **argv)
printf (" Script %2d of %2d: %.4s\n", n_script+1, num_scripts, printf (" Script %2d of %2d: %.4s\n", n_script+1, num_scripts,
(const char *)scripts.get_tag(n_script)); (const char *)scripts.get_tag(n_script));
if (script.get_default_language_system () == NULL) if (!script.has_default_language_system())
printf (" No default language system\n"); printf (" No default language system\n");
int num_langsys = script.get_len (); int num_langsys = script.get_len ();
printf (" %d language system(s) found in script\n", num_langsys); printf (" %d language system(s) found in script\n", num_langsys);
@ -73,7 +73,7 @@ main (int argc, char **argv)
} }
} }
const FeatureList &features = *g.get_feature_list(); const FeatureList &features = g.get_feature_list();
int num_features = features.get_len (); int num_features = features.get_len ();
printf (" %d feature(s) found in table\n", num_features); printf (" %d feature(s) found in table\n", num_features);
for (int n_feature = 0; n_feature < num_features; n_feature++) { for (int n_feature = 0; n_feature < num_features; n_feature++) {
@ -83,7 +83,7 @@ main (int argc, char **argv)
feature.get_len()); feature.get_len());
} }
const LookupList &lookups = *g.get_lookup_list(); const LookupList &lookups = g.get_lookup_list();
int num_lookups = lookups.get_len (); int num_lookups = lookups.get_len ();
printf (" %d lookup(s) found in table\n", num_lookups); printf (" %d lookup(s) found in table\n", num_lookups);
for (int n_lookup = 0; n_lookup < num_lookups; n_lookup++) { for (int n_lookup = 0; n_lookup < num_lookups; n_lookup++) {