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[HB] Cleanup format unions

This commit is contained in:
Behdad Esfahbod 2009-05-17 19:47:54 -04:00
parent da1097bc3b
commit f8dc67b3c2
4 changed files with 77 additions and 85 deletions
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18
src/hb-ot-layout-gdef-private.h
View File

@ -129,23 +129,23 @@ ASSERT_SIZE (CaretValueFormat3, 6);
struct CaretValue {
/* XXX we need access to a load-contour-point vfunc here */
int get_caret_value (int ppem) const {
switch (u.caretValueFormat) {
case 1: return u.format1.get_caret_value(ppem);
case 2: return u.format2.get_caret_value(ppem);
case 3: return u.format3.get_caret_value(ppem);
switch (u.format) {
case 1: return u.format1->get_caret_value(ppem);
case 2: return u.format2->get_caret_value(ppem);
case 3: return u.format3->get_caret_value(ppem);
default:return 0;
}
}
private:
union {
USHORT caretValueFormat; /* Format identifier */
CaretValueFormat1 format1;
CaretValueFormat2 format2;
CaretValueFormat3 format3;
USHORT format; /* Format identifier */
CaretValueFormat1 format1[];
CaretValueFormat2 format2[];
CaretValueFormat3 format3[];
} u;
};
DEFINE_NULL (CaretValue, 2);
ASSERT_SIZE (CaretValue, 2);
struct LigGlyph {

87
src/hb-ot-layout-gsub-private.h
View File

@ -91,9 +91,9 @@ struct SingleSubst {
private:
inline bool single_substitute (hb_codepoint_t &glyph_id) const {
switch (u.substFormat) {
case 1: return u.format1.single_substitute (glyph_id);
case 2: return u.format2.single_substitute (glyph_id);
switch (u.format) {
case 1: return u.format1->single_substitute (glyph_id);
case 2: return u.format2->single_substitute (glyph_id);
default:return false;
}
}
@ -118,12 +118,12 @@ struct SingleSubst {
private:
union {
USHORT substFormat; /* Format identifier */
SingleSubstFormat1 format1;
SingleSubstFormat2 format2;
USHORT format; /* Format identifier */
SingleSubstFormat1 format1[];
SingleSubstFormat2 format2[];
} u;
};
DEFINE_NULL (SingleSubst, 2);
ASSERT_SIZE (SingleSubst, 2);
struct Sequence {
@ -197,19 +197,19 @@ struct MultipleSubst {
private:
inline bool substitute (LOOKUP_ARGS_DEF) const {
switch (u.substFormat) {
case 1: return u.format1.substitute (LOOKUP_ARGS);
switch (u.format) {
case 1: return u.format1->substitute (LOOKUP_ARGS);
default:return false;
}
}
private:
union {
USHORT substFormat; /* Format identifier */
MultipleSubstFormat1 format1;
USHORT format; /* Format identifier */
MultipleSubstFormat1 format1[];
} u;
};
DEFINE_NULL (MultipleSubst, 2);
ASSERT_SIZE (MultipleSubst, 2);
typedef ArrayOf<GlyphID> AlternateSet; /* Array of alternate GlyphIDs--in
@ -275,19 +275,19 @@ struct AlternateSubst {
private:
inline bool substitute (LOOKUP_ARGS_DEF) const {
switch (u.substFormat) {
case 1: return u.format1.substitute (LOOKUP_ARGS);
switch (u.format) {
case 1: return u.format1->substitute (LOOKUP_ARGS);
default:return false;
}
}
private:
union {
USHORT substFormat; /* Format identifier */
AlternateSubstFormat1 format1;
USHORT format; /* Format identifier */
AlternateSubstFormat1 format1[];
} u;
};
DEFINE_NULL (AlternateSubst, 2);
ASSERT_SIZE (AlternateSubst, 2);
struct Ligature {
@ -432,19 +432,19 @@ struct LigatureSubst {
private:
inline bool substitute (LOOKUP_ARGS_DEF) const {
switch (u.substFormat) {
case 1: return u.format1.substitute (LOOKUP_ARGS);
switch (u.format) {
case 1: return u.format1->substitute (LOOKUP_ARGS);
default:return false;
}
}
private:
union {
USHORT substFormat; /* Format identifier */
LigatureSubstFormat1 format1;
USHORT format; /* Format identifier */
LigatureSubstFormat1 format1[];
} u;
};
DEFINE_NULL (LigatureSubst, 2);
ASSERT_SIZE (LigatureSubst, 2);
@ -456,7 +456,7 @@ struct ContextSubst : Context {
return this->apply (LOOKUP_ARGS, substitute_lookup);
}
};
DEFINE_NULL (ContextSubst, 2);
ASSERT_SIZE (ContextSubst, 2);
struct ChainSubRule {
@ -622,23 +622,23 @@ struct ChainContextSubst {
private:
inline bool substitute (LOOKUP_ARGS_DEF) const {
switch (u.substFormat) {
case 1: return u.format1.substitute (LOOKUP_ARGS);
case 2: return u.format2.substitute (LOOKUP_ARGS);
case 3: return u.format3.substitute (LOOKUP_ARGS);
switch (u.format) {
case 1: return u.format1->substitute (LOOKUP_ARGS);
case 2: return u.format2->substitute (LOOKUP_ARGS);
case 3: return u.format3->substitute (LOOKUP_ARGS);
default:return false;
}
}
private:
union {
USHORT substFormat; /* Format identifier */
ChainContextSubstFormat1 format1;
ChainContextSubstFormat2 format2;
ChainContextSubstFormat3 format3;
USHORT format; /* Format identifier */
ChainContextSubstFormat1 format1[];
ChainContextSubstFormat2 format2[];
ChainContextSubstFormat3 format3[];
} u;
};
DEFINE_NULL (ChainContextSubst, 2);
ASSERT_SIZE (ChainContextSubst, 2);
struct ExtensionSubstFormat1 {
@ -647,6 +647,7 @@ struct ExtensionSubstFormat1 {
private:
inline unsigned int get_type (void) const { return extensionLookupType; }
inline unsigned int get_offset (void) const { return (extensionOffset[0] << 16) + extensionOffset[1]; }
inline bool substitute (LOOKUP_ARGS_DEF) const;
private:
@ -654,8 +655,10 @@ struct ExtensionSubstFormat1 {
USHORT extensionLookupType; /* Lookup type of subtable referenced
* by ExtensionOffset (i.e. the
* extension subtable). */
ULONG extensionOffset; /* Offset to the extension subtable,
* of lookup type subtable. */
USHORT extensionOffset[2]; /* Offset to the extension subtable,
* of lookup type subtable.
* Defined as two shorts to avoid
* alignment requirements. */
};
ASSERT_SIZE (ExtensionSubstFormat1, 8);
@ -667,26 +670,26 @@ struct ExtensionSubst {
private:
inline unsigned int get_type (void) const {
switch (u.substFormat) {
case 1: return u.format1.get_type ();
switch (u.format) {
case 1: return u.format1->get_type ();
default:return 0;
}
}
inline bool substitute (LOOKUP_ARGS_DEF) const {
switch (u.substFormat) {
case 1: return u.format1.substitute (LOOKUP_ARGS);
switch (u.format) {
case 1: return u.format1->substitute (LOOKUP_ARGS);
default:return false;
}
}
private:
union {
USHORT substFormat; /* Format identifier */
ExtensionSubstFormat1 format1;
USHORT format; /* Format identifier */
ExtensionSubstFormat1 format1[];
} u;
};
DEFINE_NULL (ExtensionSubst, 2);
ASSERT_SIZE (ExtensionSubst, 2);
@ -905,7 +908,7 @@ struct GSUB : GSUBGPOS {
inline bool ExtensionSubstFormat1::substitute (LOOKUP_ARGS_DEF) const {
/* XXX either check in sanitize or here that the lookuptype is not 7 again,
* or we can loop indefinitely. */
return (*(SubstLookupSubTable *)(((char *) this) + extensionOffset)).substitute (LOOKUP_ARGS,
return (*(SubstLookupSubTable *)(((char *) this) + get_offset ())).substitute (LOOKUP_ARGS,
get_type ());
}

16
src/hb-ot-layout-gsubgpos-private.h
View File

@ -315,22 +315,22 @@ struct Context {
protected:
bool apply (LOOKUP_ARGS_DEF, apply_lookup_func_t apply_func) const {
switch (u.format) {
case 1: return u.format1.apply (LOOKUP_ARGS, apply_func);
case 2: return u.format2.apply (LOOKUP_ARGS, apply_func);
case 3: return u.format3.apply (LOOKUP_ARGS, apply_func);
case 1: return u.format1->apply (LOOKUP_ARGS, apply_func);
case 2: return u.format2->apply (LOOKUP_ARGS, apply_func);
case 3: return u.format3->apply (LOOKUP_ARGS, apply_func);
default:return false;
}
}
private:
union {
USHORT format; /* Format identifier */
ContextFormat1 format1;
ContextFormat2 format2;
ContextFormat3 format3;
USHORT format; /* Format identifier */
ContextFormat1 format1[];
ContextFormat2 format2[];
ContextFormat3 format3[];
} u;
};
DEFINE_NULL (Context, 2);
ASSERT_SIZE (Context, 2);
#endif /* HB_OT_LAYOUT_GSUBGPOS_PRIVATE_H */

41
src/hb-ot-layout-open-private.h
View File

@ -167,22 +167,11 @@ static const char NullPool[16] = "";
/* Generic template for nul-content sizeof-sized Null objects. */
template <typename Type>
struct NullSize {
char bytes[sizeof (Type)];
};
template <typename Type>
struct Null {
ASSERT_STATIC (sizeof (NullSize<Type>) <= sizeof (NullPool));
ASSERT_STATIC (sizeof (Type) <= sizeof (NullPool));
static inline const Type &get () { return (const Type&) *(const Type*) NullPool; }
};
/* Specializaiton for nul-content arbitrary-sized Null objects. */
#define DEFINE_NULL(Type, size) \
template <> \
struct NullSize <Type> { \
char bytes[size]; \
}
/* Specializaiton for arbitrary-content arbitrary-sized Null objects. */
#define DEFINE_NULL_DATA(Type, size, data) \
template <> \
@ -785,9 +774,9 @@ ASSERT_SIZE (CoverageFormat2, 4);
struct Coverage {
unsigned int get_coverage (hb_codepoint_t glyph_id) const {
switch (u.coverageFormat) {
case 1: return u.format1.get_coverage(glyph_id);
case 2: return u.format2.get_coverage(glyph_id);
switch (u.format) {
case 1: return u.format1->get_coverage(glyph_id);
case 2: return u.format2->get_coverage(glyph_id);
default:return NOT_COVERED;
}
}
@ -798,12 +787,12 @@ struct Coverage {
private:
union {
USHORT coverageFormat; /* Format identifier */
CoverageFormat1 format1;
CoverageFormat2 format2;
USHORT format; /* Format identifier */
CoverageFormat1 format1[];
CoverageFormat2 format2[];
} u;
};
DEFINE_NULL (Coverage, 2);
ASSERT_SIZE (Coverage, 2);
/*
* Class Definition Table
@ -870,21 +859,21 @@ ASSERT_SIZE (ClassDefFormat2, 4);
struct ClassDef {
hb_ot_layout_class_t get_class (hb_codepoint_t glyph_id) const {
switch (u.classFormat) {
case 1: return u.format1.get_class(glyph_id);
case 2: return u.format2.get_class(glyph_id);
switch (u.format) {
case 1: return u.format1->get_class(glyph_id);
case 2: return u.format2->get_class(glyph_id);
default:return 0;
}
}
private:
union {
USHORT classFormat; /* Format identifier */
ClassDefFormat1 format1;
ClassDefFormat2 format2;
USHORT format; /* Format identifier */
ClassDefFormat1 format1[];
ClassDefFormat2 format2[];
} u;
};
DEFINE_NULL (ClassDef, 2);
ASSERT_SIZE (ClassDef, 2);
/*
* Device Tables