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-rw-r--r--src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh1184
1 files changed, 0 insertions, 1184 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh
deleted file mode 100644
index 2f4e1b9e9e..0000000000
--- a/src/3rdparty/harfbuzz-ng/src/hb-open-type-private.hh
+++ /dev/null
@@ -1,1184 +0,0 @@
-/*
- * Copyright © 2007,2008,2009,2010 Red Hat, Inc.
- * Copyright © 2012 Google, Inc.
- *
- * This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Red Hat Author(s): Behdad Esfahbod
- * Google Author(s): Behdad Esfahbod
- */
-
-#ifndef HB_OPEN_TYPE_PRIVATE_HH
-#define HB_OPEN_TYPE_PRIVATE_HH
-
-#include "hb-private.hh"
-#include "hb-debug.hh"
-#include "hb-face-private.hh"
-
-
-namespace OT {
-
-
-
-/*
- * Casts
- */
-
-/* Cast to struct T, reference to reference */
-template<typename Type, typename TObject>
-static inline const Type& CastR(const TObject &X)
-{ return reinterpret_cast<const Type&> (X); }
-template<typename Type, typename TObject>
-static inline Type& CastR(TObject &X)
-{ return reinterpret_cast<Type&> (X); }
-
-/* Cast to struct T, pointer to pointer */
-template<typename Type, typename TObject>
-static inline const Type* CastP(const TObject *X)
-{ return reinterpret_cast<const Type*> (X); }
-template<typename Type, typename TObject>
-static inline Type* CastP(TObject *X)
-{ return reinterpret_cast<Type*> (X); }
-
-/* StructAtOffset<T>(P,Ofs) returns the struct T& that is placed at memory
- * location pointed to by P plus Ofs bytes. */
-template<typename Type>
-static inline const Type& StructAtOffset(const void *P, unsigned int offset)
-{ return * reinterpret_cast<const Type*> ((const char *) P + offset); }
-template<typename Type>
-static inline Type& StructAtOffset(void *P, unsigned int offset)
-{ return * reinterpret_cast<Type*> ((char *) P + offset); }
-
-/* StructAfter<T>(X) returns the struct T& that is placed after X.
- * Works with X of variable size also. X must implement get_size() */
-template<typename Type, typename TObject>
-static inline const Type& StructAfter(const TObject &X)
-{ return StructAtOffset<Type>(&X, X.get_size()); }
-template<typename Type, typename TObject>
-static inline Type& StructAfter(TObject &X)
-{ return StructAtOffset<Type>(&X, X.get_size()); }
-
-
-
-/*
- * Size checking
- */
-
-/* Check _assertion in a method environment */
-#define _DEFINE_INSTANCE_ASSERTION1(_line, _assertion) \
- inline void _instance_assertion_on_line_##_line (void) const \
- { \
- static_assert ((_assertion), ""); \
- ASSERT_INSTANCE_POD (*this); /* Make sure it's POD. */ \
- }
-# define _DEFINE_INSTANCE_ASSERTION0(_line, _assertion) _DEFINE_INSTANCE_ASSERTION1 (_line, _assertion)
-# define DEFINE_INSTANCE_ASSERTION(_assertion) _DEFINE_INSTANCE_ASSERTION0 (__LINE__, _assertion)
-
-/* Check that _code compiles in a method environment */
-#define _DEFINE_COMPILES_ASSERTION1(_line, _code) \
- inline void _compiles_assertion_on_line_##_line (void) const \
- { _code; }
-# define _DEFINE_COMPILES_ASSERTION0(_line, _code) _DEFINE_COMPILES_ASSERTION1 (_line, _code)
-# define DEFINE_COMPILES_ASSERTION(_code) _DEFINE_COMPILES_ASSERTION0 (__LINE__, _code)
-
-
-#define DEFINE_SIZE_STATIC(size) \
- DEFINE_INSTANCE_ASSERTION (sizeof (*this) == (size)); \
- static const unsigned int static_size = (size); \
- static const unsigned int min_size = (size); \
- inline unsigned int get_size (void) const { return (size); }
-
-#define DEFINE_SIZE_UNION(size, _member) \
- DEFINE_INSTANCE_ASSERTION (0*sizeof(this->u._member.static_size) + sizeof(this->u._member) == (size)); \
- static const unsigned int min_size = (size)
-
-#define DEFINE_SIZE_MIN(size) \
- DEFINE_INSTANCE_ASSERTION (sizeof (*this) >= (size)); \
- static const unsigned int min_size = (size)
-
-#define DEFINE_SIZE_ARRAY(size, array) \
- DEFINE_INSTANCE_ASSERTION (sizeof (*this) == (size) + sizeof (array[0])); \
- DEFINE_COMPILES_ASSERTION ((void) array[0].static_size) \
- static const unsigned int min_size = (size)
-
-#define DEFINE_SIZE_ARRAY2(size, array1, array2) \
- DEFINE_INSTANCE_ASSERTION (sizeof (*this) == (size) + sizeof (this->array1[0]) + sizeof (this->array2[0])); \
- DEFINE_COMPILES_ASSERTION ((void) array1[0].static_size; (void) array2[0].static_size) \
- static const unsigned int min_size = (size)
-
-
-
-/*
- * Null objects
- */
-
-/* Global nul-content Null pool. Enlarge as necessary. */
-
-#define HB_NULL_POOL_SIZE 264
-static_assert (HB_NULL_POOL_SIZE % sizeof (void *) == 0, "Align HB_NULL_POOL_SIZE.");
-extern HB_INTERNAL const void * const _hb_NullPool[HB_NULL_POOL_SIZE / sizeof (void *)];
-
-/* Generic nul-content Null objects. */
-template <typename Type>
-static inline const Type& Null (void) {
- static_assert (sizeof (Type) <= HB_NULL_POOL_SIZE, "Increase HB_NULL_POOL_SIZE.");
- return *CastP<Type> (_hb_NullPool);
-}
-
-/* Specializaiton for arbitrary-content arbitrary-sized Null objects. */
-#define DEFINE_NULL_DATA(Type, data) \
-static const char _Null##Type[sizeof (Type) + 1] = data; /* +1 is for nul-termination in data */ \
-template <> \
-/*static*/ inline const Type& Null<Type> (void) { \
- return *CastP<Type> (_Null##Type); \
-} /* The following line really exists such that we end in a place needing semicolon */ \
-static_assert (Type::min_size + 1 <= sizeof (_Null##Type), "Null pool too small. Enlarge.")
-
-/* Accessor macro. */
-#define Null(Type) Null<Type>()
-
-
-/*
- * Dispatch
- */
-
-template <typename Context, typename Return, unsigned int MaxDebugDepth>
-struct hb_dispatch_context_t
-{
- static const unsigned int max_debug_depth = MaxDebugDepth;
- typedef Return return_t;
- template <typename T, typename F>
- inline bool may_dispatch (const T *obj, const F *format) { return true; }
- static return_t no_dispatch_return_value (void) { return Context::default_return_value (); }
-};
-
-
-/*
- * Sanitize
- */
-
-/* This limits sanitizing time on really broken fonts. */
-#ifndef HB_SANITIZE_MAX_EDITS
-#define HB_SANITIZE_MAX_EDITS 32
-#endif
-
-struct hb_sanitize_context_t :
- hb_dispatch_context_t<hb_sanitize_context_t, bool, HB_DEBUG_SANITIZE>
-{
- inline hb_sanitize_context_t (void) :
- debug_depth (0),
- start (nullptr), end (nullptr),
- writable (false), edit_count (0),
- blob (nullptr) {}
-
- inline const char *get_name (void) { return "SANITIZE"; }
- template <typename T, typename F>
- inline bool may_dispatch (const T *obj, const F *format)
- { return format->sanitize (this); }
- template <typename T>
- inline return_t dispatch (const T &obj) { return obj.sanitize (this); }
- static return_t default_return_value (void) { return true; }
- static return_t no_dispatch_return_value (void) { return false; }
- bool stop_sublookup_iteration (const return_t r) const { return !r; }
-
- inline void init (hb_blob_t *b)
- {
- this->blob = hb_blob_reference (b);
- this->writable = false;
- }
-
- inline void start_processing (void)
- {
- this->start = hb_blob_get_data (this->blob, nullptr);
- this->end = this->start + hb_blob_get_length (this->blob);
- assert (this->start <= this->end); /* Must not overflow. */
- this->edit_count = 0;
- this->debug_depth = 0;
-
- DEBUG_MSG_LEVEL (SANITIZE, start, 0, +1,
- "start [%p..%p] (%lu bytes)",
- this->start, this->end,
- (unsigned long) (this->end - this->start));
- }
-
- inline void end_processing (void)
- {
- DEBUG_MSG_LEVEL (SANITIZE, this->start, 0, -1,
- "end [%p..%p] %u edit requests",
- this->start, this->end, this->edit_count);
-
- hb_blob_destroy (this->blob);
- this->blob = nullptr;
- this->start = this->end = nullptr;
- }
-
- inline bool check_range (const void *base, unsigned int len) const
- {
- const char *p = (const char *) base;
- bool ok = this->start <= p && p <= this->end && (unsigned int) (this->end - p) >= len;
-
- DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0,
- "check_range [%p..%p] (%d bytes) in [%p..%p] -> %s",
- p, p + len, len,
- this->start, this->end,
- ok ? "OK" : "OUT-OF-RANGE");
-
- return likely (ok);
- }
-
- inline bool check_array (const void *base, unsigned int record_size, unsigned int len) const
- {
- const char *p = (const char *) base;
- bool overflows = _hb_unsigned_int_mul_overflows (len, record_size);
- unsigned int array_size = record_size * len;
- bool ok = !overflows && this->check_range (base, array_size);
-
- DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0,
- "check_array [%p..%p] (%d*%d=%d bytes) in [%p..%p] -> %s",
- p, p + (record_size * len), record_size, len, (unsigned int) array_size,
- this->start, this->end,
- overflows ? "OVERFLOWS" : ok ? "OK" : "OUT-OF-RANGE");
-
- return likely (ok);
- }
-
- template <typename Type>
- inline bool check_struct (const Type *obj) const
- {
- return likely (this->check_range (obj, obj->min_size));
- }
-
- inline bool may_edit (const void *base HB_UNUSED, unsigned int len HB_UNUSED)
- {
- if (this->edit_count >= HB_SANITIZE_MAX_EDITS)
- return false;
-
- const char *p = (const char *) base;
- this->edit_count++;
-
- DEBUG_MSG_LEVEL (SANITIZE, p, this->debug_depth+1, 0,
- "may_edit(%u) [%p..%p] (%d bytes) in [%p..%p] -> %s",
- this->edit_count,
- p, p + len, len,
- this->start, this->end,
- this->writable ? "GRANTED" : "DENIED");
-
- return this->writable;
- }
-
- template <typename Type, typename ValueType>
- inline bool try_set (const Type *obj, const ValueType &v) {
- if (this->may_edit (obj, obj->static_size)) {
- const_cast<Type *> (obj)->set (v);
- return true;
- }
- return false;
- }
-
- mutable unsigned int debug_depth;
- const char *start, *end;
- bool writable;
- unsigned int edit_count;
- hb_blob_t *blob;
-};
-
-
-
-/* Template to sanitize an object. */
-template <typename Type>
-struct Sanitizer
-{
- static hb_blob_t *sanitize (hb_blob_t *blob) {
- hb_sanitize_context_t c[1];
- bool sane;
-
- /* TODO is_sane() stuff */
-
- c->init (blob);
-
- retry:
- DEBUG_MSG_FUNC (SANITIZE, c->start, "start");
-
- c->start_processing ();
-
- if (unlikely (!c->start)) {
- c->end_processing ();
- return blob;
- }
-
- Type *t = CastP<Type> (const_cast<char *> (c->start));
-
- sane = t->sanitize (c);
- if (sane) {
- if (c->edit_count) {
- DEBUG_MSG_FUNC (SANITIZE, c->start, "passed first round with %d edits; going for second round", c->edit_count);
-
- /* sanitize again to ensure no toe-stepping */
- c->edit_count = 0;
- sane = t->sanitize (c);
- if (c->edit_count) {
- DEBUG_MSG_FUNC (SANITIZE, c->start, "requested %d edits in second round; FAILLING", c->edit_count);
- sane = false;
- }
- }
- } else {
- unsigned int edit_count = c->edit_count;
- if (edit_count && !c->writable) {
- c->start = hb_blob_get_data_writable (blob, nullptr);
- c->end = c->start + hb_blob_get_length (blob);
-
- if (c->start) {
- c->writable = true;
- /* ok, we made it writable by relocating. try again */
- DEBUG_MSG_FUNC (SANITIZE, c->start, "retry");
- goto retry;
- }
- }
- }
-
- c->end_processing ();
-
- DEBUG_MSG_FUNC (SANITIZE, c->start, sane ? "PASSED" : "FAILED");
- if (sane)
- return blob;
- else {
- hb_blob_destroy (blob);
- return hb_blob_get_empty ();
- }
- }
-
- static const Type* lock_instance (hb_blob_t *blob) {
- hb_blob_make_immutable (blob);
- const char *base = hb_blob_get_data (blob, nullptr);
- return unlikely (!base) ? &Null(Type) : CastP<Type> (base);
- }
-};
-
-
-
-/*
- * Serialize
- */
-
-
-struct hb_serialize_context_t
-{
- inline hb_serialize_context_t (void *start_, unsigned int size)
- {
- this->start = (char *) start_;
- this->end = this->start + size;
-
- this->ran_out_of_room = false;
- this->head = this->start;
- this->debug_depth = 0;
- }
-
- template <typename Type>
- inline Type *start_serialize (void)
- {
- DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, +1,
- "start [%p..%p] (%lu bytes)",
- this->start, this->end,
- (unsigned long) (this->end - this->start));
-
- return start_embed<Type> ();
- }
-
- inline void end_serialize (void)
- {
- DEBUG_MSG_LEVEL (SERIALIZE, this->start, 0, -1,
- "end [%p..%p] serialized %d bytes; %s",
- this->start, this->end,
- (int) (this->head - this->start),
- this->ran_out_of_room ? "RAN OUT OF ROOM" : "did not ran out of room");
-
- }
-
- template <typename Type>
- inline Type *copy (void)
- {
- assert (!this->ran_out_of_room);
- unsigned int len = this->head - this->start;
- void *p = malloc (len);
- if (p)
- memcpy (p, this->start, len);
- return reinterpret_cast<Type *> (p);
- }
-
- template <typename Type>
- inline Type *allocate_size (unsigned int size)
- {
- if (unlikely (this->ran_out_of_room || this->end - this->head < ptrdiff_t (size))) {
- this->ran_out_of_room = true;
- return nullptr;
- }
- memset (this->head, 0, size);
- char *ret = this->head;
- this->head += size;
- return reinterpret_cast<Type *> (ret);
- }
-
- template <typename Type>
- inline Type *allocate_min (void)
- {
- return this->allocate_size<Type> (Type::min_size);
- }
-
- template <typename Type>
- inline Type *start_embed (void)
- {
- Type *ret = reinterpret_cast<Type *> (this->head);
- return ret;
- }
-
- template <typename Type>
- inline Type *embed (const Type &obj)
- {
- unsigned int size = obj.get_size ();
- Type *ret = this->allocate_size<Type> (size);
- if (unlikely (!ret)) return nullptr;
- memcpy (ret, obj, size);
- return ret;
- }
-
- template <typename Type>
- inline Type *extend_min (Type &obj)
- {
- unsigned int size = obj.min_size;
- assert (this->start <= (char *) &obj && (char *) &obj <= this->head && (char *) &obj + size >= this->head);
- if (unlikely (!this->allocate_size<Type> (((char *) &obj) + size - this->head))) return nullptr;
- return reinterpret_cast<Type *> (&obj);
- }
-
- template <typename Type>
- inline Type *extend (Type &obj)
- {
- unsigned int size = obj.get_size ();
- assert (this->start < (char *) &obj && (char *) &obj <= this->head && (char *) &obj + size >= this->head);
- if (unlikely (!this->allocate_size<Type> (((char *) &obj) + size - this->head))) return nullptr;
- return reinterpret_cast<Type *> (&obj);
- }
-
- inline void truncate (void *new_head)
- {
- assert (this->start < new_head && new_head <= this->head);
- this->head = (char *) new_head;
- }
-
- unsigned int debug_depth;
- char *start, *end, *head;
- bool ran_out_of_room;
-};
-
-template <typename Type>
-struct Supplier
-{
- inline Supplier (const Type *array, unsigned int len_)
- {
- head = array;
- len = len_;
- }
- inline const Type operator [] (unsigned int i) const
- {
- if (unlikely (i >= len)) return Type ();
- return head[i];
- }
-
- inline void advance (unsigned int count)
- {
- if (unlikely (count > len))
- count = len;
- len -= count;
- head += count;
- }
-
- private:
- inline Supplier (const Supplier<Type> &); /* Disallow copy */
- inline Supplier<Type>& operator= (const Supplier<Type> &); /* Disallow copy */
-
- unsigned int len;
- const Type *head;
-};
-
-
-
-
-/*
- *
- * The OpenType Font File: Data Types
- */
-
-
-/* "The following data types are used in the OpenType font file.
- * All OpenType fonts use Motorola-style byte ordering (Big Endian):" */
-
-/*
- * Int types
- */
-
-
-template <typename Type, int Bytes> struct BEInt;
-
-template <typename Type>
-struct BEInt<Type, 1>
-{
- public:
- inline void set (Type V)
- {
- v = V;
- }
- inline operator Type (void) const
- {
- return v;
- }
- private: uint8_t v;
-};
-template <typename Type>
-struct BEInt<Type, 2>
-{
- public:
- inline void set (Type V)
- {
- v[0] = (V >> 8) & 0xFF;
- v[1] = (V ) & 0xFF;
- }
- inline operator Type (void) const
- {
- return (v[0] << 8)
- + (v[1] );
- }
- private: uint8_t v[2];
-};
-template <typename Type>
-struct BEInt<Type, 3>
-{
- public:
- inline void set (Type V)
- {
- v[0] = (V >> 16) & 0xFF;
- v[1] = (V >> 8) & 0xFF;
- v[2] = (V ) & 0xFF;
- }
- inline operator Type (void) const
- {
- return (v[0] << 16)
- + (v[1] << 8)
- + (v[2] );
- }
- private: uint8_t v[3];
-};
-template <typename Type>
-struct BEInt<Type, 4>
-{
- public:
- inline void set (Type V)
- {
- v[0] = (V >> 24) & 0xFF;
- v[1] = (V >> 16) & 0xFF;
- v[2] = (V >> 8) & 0xFF;
- v[3] = (V ) & 0xFF;
- }
- inline operator Type (void) const
- {
- return (v[0] << 24)
- + (v[1] << 16)
- + (v[2] << 8)
- + (v[3] );
- }
- private: uint8_t v[4];
-};
-
-/* Integer types in big-endian order and no alignment requirement */
-template <typename Type, unsigned int Size>
-struct IntType
-{
- inline void set (Type i) { v.set (i); }
- inline operator Type(void) const { return v; }
- inline bool operator == (const IntType<Type,Size> &o) const { return (Type) v == (Type) o.v; }
- inline bool operator != (const IntType<Type,Size> &o) const { return !(*this == o); }
- static inline int cmp (const IntType<Type,Size> *a, const IntType<Type,Size> *b) { return b->cmp (*a); }
- template <typename Type2>
- inline int cmp (Type2 a) const
- {
- Type b = v;
- if (sizeof (Type) < sizeof (int) && sizeof (Type2) < sizeof (int))
- return (int) a - (int) b;
- else
- return a < b ? -1 : a == b ? 0 : +1;
- }
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (likely (c->check_struct (this)));
- }
- protected:
- BEInt<Type, Size> v;
- public:
- DEFINE_SIZE_STATIC (Size);
-};
-
-typedef IntType<uint8_t, 1> UINT8; /* 8-bit unsigned integer. */
-typedef IntType<int8_t, 1> INT8; /* 8-bit signed integer. */
-typedef IntType<uint16_t, 2> UINT16; /* 16-bit unsigned integer. */
-typedef IntType<int16_t, 2> INT16; /* 16-bit signed integer. */
-typedef IntType<uint32_t, 4> UINT32; /* 32-bit unsigned integer. */
-typedef IntType<int32_t, 4> INT32; /* 32-bit signed integer. */
-typedef IntType<uint32_t, 3> UINT24; /* 24-bit unsigned integer. */
-
-/* 16-bit signed integer (INT16) that describes a quantity in FUnits. */
-typedef INT16 FWORD;
-
-/* 16-bit unsigned integer (UINT16) that describes a quantity in FUnits. */
-typedef UINT16 UFWORD;
-
-/* 16-bit signed fixed number with the low 14 bits of fraction (2.14). */
-struct F2DOT14 : INT16
-{
- //inline float to_float (void) const { return ???; }
- //inline void set_float (float f) { v.set (f * ???); }
- public:
- DEFINE_SIZE_STATIC (2);
-};
-
-/* 32-bit signed fixed-point number (16.16). */
-struct Fixed: INT32
-{
- //inline float to_float (void) const { return ???; }
- //inline void set_float (float f) { v.set (f * ???); }
- public:
- DEFINE_SIZE_STATIC (4);
-};
-
-/* Date represented in number of seconds since 12:00 midnight, January 1,
- * 1904. The value is represented as a signed 64-bit integer. */
-struct LONGDATETIME
-{
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (likely (c->check_struct (this)));
- }
- protected:
- INT32 major;
- UINT32 minor;
- public:
- DEFINE_SIZE_STATIC (8);
-};
-
-/* Array of four uint8s (length = 32 bits) used to identify a script, language
- * system, feature, or baseline */
-struct Tag : UINT32
-{
- /* What the char* converters return is NOT nul-terminated. Print using "%.4s" */
- inline operator const char* (void) const { return reinterpret_cast<const char *> (&this->v); }
- inline operator char* (void) { return reinterpret_cast<char *> (&this->v); }
- public:
- DEFINE_SIZE_STATIC (4);
-};
-DEFINE_NULL_DATA (Tag, " ");
-
-/* Glyph index number, same as uint16 (length = 16 bits) */
-typedef UINT16 GlyphID;
-
-/* Script/language-system/feature index */
-struct Index : UINT16 {
- static const unsigned int NOT_FOUND_INDEX = 0xFFFFu;
-};
-DEFINE_NULL_DATA (Index, "\xff\xff");
-
-/* Offset, Null offset = 0 */
-template <typename Type>
-struct Offset : Type
-{
- inline bool is_null (void) const { return 0 == *this; }
- public:
- DEFINE_SIZE_STATIC (sizeof(Type));
-};
-
-typedef Offset<UINT16> Offset16;
-typedef Offset<UINT32> Offset32;
-
-
-/* CheckSum */
-struct CheckSum : UINT32
-{
- /* This is reference implementation from the spec. */
- static inline uint32_t CalcTableChecksum (const UINT32 *Table, uint32_t Length)
- {
- uint32_t Sum = 0L;
- const UINT32 *EndPtr = Table+((Length+3) & ~3) / UINT32::static_size;
-
- while (Table < EndPtr)
- Sum += *Table++;
- return Sum;
- }
-
- /* Note: data should be 4byte aligned and have 4byte padding at the end. */
- inline void set_for_data (const void *data, unsigned int length)
- { set (CalcTableChecksum ((const UINT32 *) data, length)); }
-
- public:
- DEFINE_SIZE_STATIC (4);
-};
-
-
-/*
- * Version Numbers
- */
-
-template <typename FixedType=UINT16>
-struct FixedVersion
-{
- inline uint32_t to_int (void) const { return (major << (sizeof(FixedType) * 8)) + minor; }
-
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this));
- }
-
- FixedType major;
- FixedType minor;
- public:
- DEFINE_SIZE_STATIC (2 * sizeof(FixedType));
-};
-
-
-
-/*
- * Template subclasses of Offset that do the dereferencing.
- * Use: (base+offset)
- */
-
-template <typename Type, typename OffsetType=UINT16>
-struct OffsetTo : Offset<OffsetType>
-{
- inline const Type& operator () (const void *base) const
- {
- unsigned int offset = *this;
- if (unlikely (!offset)) return Null(Type);
- return StructAtOffset<Type> (base, offset);
- }
-
- inline Type& serialize (hb_serialize_context_t *c, const void *base)
- {
- Type *t = c->start_embed<Type> ();
- this->set ((char *) t - (char *) base); /* TODO(serialize) Overflow? */
- return *t;
- }
-
- inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!c->check_struct (this))) return_trace (false);
- unsigned int offset = *this;
- if (unlikely (!offset)) return_trace (true);
- if (unlikely (!c->check_range (base, offset))) return_trace (false);
- const Type &obj = StructAtOffset<Type> (base, offset);
- return_trace (likely (obj.sanitize (c)) || neuter (c));
- }
- template <typename T>
- inline bool sanitize (hb_sanitize_context_t *c, const void *base, T user_data) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!c->check_struct (this))) return_trace (false);
- unsigned int offset = *this;
- if (unlikely (!offset)) return_trace (true);
- if (unlikely (!c->check_range (base, offset))) return_trace (false);
- const Type &obj = StructAtOffset<Type> (base, offset);
- return_trace (likely (obj.sanitize (c, user_data)) || neuter (c));
- }
-
- /* Set the offset to Null */
- inline bool neuter (hb_sanitize_context_t *c) const {
- return c->try_set (this, 0);
- }
- DEFINE_SIZE_STATIC (sizeof(OffsetType));
-};
-template <typename Type> struct LOffsetTo : OffsetTo<Type, UINT32> {};
-template <typename Base, typename OffsetType, typename Type>
-static inline const Type& operator + (const Base &base, const OffsetTo<Type, OffsetType> &offset) { return offset (base); }
-template <typename Base, typename OffsetType, typename Type>
-static inline Type& operator + (Base &base, OffsetTo<Type, OffsetType> &offset) { return offset (base); }
-
-
-/*
- * Array Types
- */
-
-/* An array with a number of elements. */
-template <typename Type, typename LenType=UINT16>
-struct ArrayOf
-{
- const Type *sub_array (unsigned int start_offset, unsigned int *pcount /* IN/OUT */) const
- {
- unsigned int count = len;
- if (unlikely (start_offset > count))
- count = 0;
- else
- count -= start_offset;
- count = MIN (count, *pcount);
- *pcount = count;
- return array + start_offset;
- }
-
- inline const Type& operator [] (unsigned int i) const
- {
- if (unlikely (i >= len)) return Null(Type);
- return array[i];
- }
- inline Type& operator [] (unsigned int i)
- {
- return array[i];
- }
- inline unsigned int get_size (void) const
- { return len.static_size + len * Type::static_size; }
-
- inline bool serialize (hb_serialize_context_t *c,
- unsigned int items_len)
- {
- TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return_trace (false);
- len.set (items_len); /* TODO(serialize) Overflow? */
- if (unlikely (!c->extend (*this))) return_trace (false);
- return_trace (true);
- }
-
- inline bool serialize (hb_serialize_context_t *c,
- Supplier<Type> &items,
- unsigned int items_len)
- {
- TRACE_SERIALIZE (this);
- if (unlikely (!serialize (c, items_len))) return_trace (false);
- for (unsigned int i = 0; i < items_len; i++)
- array[i] = items[i];
- items.advance (items_len);
- return_trace (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!sanitize_shallow (c))) return_trace (false);
-
- /* Note: for structs that do not reference other structs,
- * we do not need to call their sanitize() as we already did
- * a bound check on the aggregate array size. We just include
- * a small unreachable expression to make sure the structs
- * pointed to do have a simple sanitize(), ie. they do not
- * reference other structs via offsets.
- */
- (void) (false && array[0].sanitize (c));
-
- return_trace (true);
- }
- inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!sanitize_shallow (c))) return_trace (false);
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- if (unlikely (!array[i].sanitize (c, base)))
- return_trace (false);
- return_trace (true);
- }
- template <typename T>
- inline bool sanitize (hb_sanitize_context_t *c, const void *base, T user_data) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!sanitize_shallow (c))) return_trace (false);
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- if (unlikely (!array[i].sanitize (c, base, user_data)))
- return_trace (false);
- return_trace (true);
- }
-
- template <typename SearchType>
- inline int lsearch (const SearchType &x) const
- {
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- if (!this->array[i].cmp (x))
- return i;
- return -1;
- }
-
- private:
- inline bool sanitize_shallow (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (len.sanitize (c) && c->check_array (array, Type::static_size, len));
- }
-
- public:
- LenType len;
- Type array[VAR];
- public:
- DEFINE_SIZE_ARRAY (sizeof (LenType), array);
-};
-template <typename Type> struct LArrayOf : ArrayOf<Type, UINT32> {};
-
-/* Array of Offset's */
-template <typename Type, typename OffsetType=UINT16>
-struct OffsetArrayOf : ArrayOf<OffsetTo<Type, OffsetType> > {};
-
-/* Array of offsets relative to the beginning of the array itself. */
-template <typename Type>
-struct OffsetListOf : OffsetArrayOf<Type>
-{
- inline const Type& operator [] (unsigned int i) const
- {
- if (unlikely (i >= this->len)) return Null(Type);
- return this+this->array[i];
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (OffsetArrayOf<Type>::sanitize (c, this));
- }
- template <typename T>
- inline bool sanitize (hb_sanitize_context_t *c, T user_data) const
- {
- TRACE_SANITIZE (this);
- return_trace (OffsetArrayOf<Type>::sanitize (c, this, user_data));
- }
-};
-
-
-/* An array starting at second element. */
-template <typename Type, typename LenType=UINT16>
-struct HeadlessArrayOf
-{
- inline const Type& operator [] (unsigned int i) const
- {
- if (unlikely (i >= len || !i)) return Null(Type);
- return array[i-1];
- }
- inline unsigned int get_size (void) const
- { return len.static_size + (len ? len - 1 : 0) * Type::static_size; }
-
- inline bool serialize (hb_serialize_context_t *c,
- Supplier<Type> &items,
- unsigned int items_len)
- {
- TRACE_SERIALIZE (this);
- if (unlikely (!c->extend_min (*this))) return_trace (false);
- len.set (items_len); /* TODO(serialize) Overflow? */
- if (unlikely (!items_len)) return_trace (true);
- if (unlikely (!c->extend (*this))) return_trace (false);
- for (unsigned int i = 0; i < items_len - 1; i++)
- array[i] = items[i];
- items.advance (items_len - 1);
- return_trace (true);
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- if (unlikely (!sanitize_shallow (c))) return_trace (false);
-
- /* Note: for structs that do not reference other structs,
- * we do not need to call their sanitize() as we already did
- * a bound check on the aggregate array size. We just include
- * a small unreachable expression to make sure the structs
- * pointed to do have a simple sanitize(), ie. they do not
- * reference other structs via offsets.
- */
- (void) (false && array[0].sanitize (c));
-
- return_trace (true);
- }
-
- private:
- inline bool sanitize_shallow (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (len.sanitize (c) &&
- (!len || c->check_array (array, Type::static_size, len - 1)));
- }
-
- public:
- LenType len;
- Type array[VAR];
- public:
- DEFINE_SIZE_ARRAY (sizeof (LenType), array);
-};
-
-
-/*
- * An array with sorted elements. Supports binary searching.
- */
-template <typename Type, typename LenType=UINT16>
-struct SortedArrayOf : ArrayOf<Type, LenType>
-{
- template <typename SearchType>
- inline int bsearch (const SearchType &x) const
- {
- /* Hand-coded bsearch here since this is in the hot inner loop. */
- const Type *array = this->array;
- int min = 0, max = (int) this->len - 1;
- while (min <= max)
- {
- int mid = (min + max) / 2;
- int c = array[mid].cmp (x);
- if (c < 0)
- max = mid - 1;
- else if (c > 0)
- min = mid + 1;
- else
- return mid;
- }
- return -1;
- }
-};
-
-/*
- * Binary-search arrays
- */
-
-struct BinSearchHeader
-{
- inline operator uint32_t (void) const { return len; }
-
- inline bool sanitize (hb_sanitize_context_t *c) const
- {
- TRACE_SANITIZE (this);
- return_trace (c->check_struct (this));
- }
-
- protected:
- UINT16 len;
- UINT16 searchRangeZ;
- UINT16 entrySelectorZ;
- UINT16 rangeShiftZ;
-
- public:
- DEFINE_SIZE_STATIC (8);
-};
-
-template <typename Type>
-struct BinSearchArrayOf : SortedArrayOf<Type, BinSearchHeader> {};
-
-
-/* Lazy struct and blob loaders. */
-
-/* Logic is shared between hb_lazy_loader_t and hb_lazy_table_loader_t */
-template <typename T>
-struct hb_lazy_loader_t
-{
- inline void init (hb_face_t *face_)
- {
- face = face_;
- instance = nullptr;
- }
-
- inline void fini (void)
- {
- if (instance && instance != &OT::Null(T))
- {
- instance->fini();
- free (instance);
- }
- }
-
- inline const T* get (void) const
- {
- retry:
- T *p = (T *) hb_atomic_ptr_get (&instance);
- if (unlikely (!p))
- {
- p = (T *) calloc (1, sizeof (T));
- if (unlikely (!p))
- p = const_cast<T *> (&OT::Null(T));
- else
- p->init (face);
- if (unlikely (!hb_atomic_ptr_cmpexch (const_cast<T **>(&instance), nullptr, p)))
- {
- if (p != &OT::Null(T))
- p->fini ();
- goto retry;
- }
- }
- return p;
- }
-
- inline const T* operator-> (void) const
- {
- return get ();
- }
-
- private:
- hb_face_t *face;
- T *instance;
-};
-
-/* Logic is shared between hb_lazy_loader_t and hb_lazy_table_loader_t */
-template <typename T>
-struct hb_lazy_table_loader_t
-{
- inline void init (hb_face_t *face_)
- {
- face = face_;
- instance = nullptr;
- blob = nullptr;
- }
-
- inline void fini (void)
- {
- hb_blob_destroy (blob);
- }
-
- inline const T* get (void) const
- {
- retry:
- T *p = (T *) hb_atomic_ptr_get (&instance);
- if (unlikely (!p))
- {
- hb_blob_t *blob_ = OT::Sanitizer<T>::sanitize (face->reference_table (T::tableTag));
- p = const_cast<T *>(OT::Sanitizer<T>::lock_instance (blob_));
- if (!hb_atomic_ptr_cmpexch (const_cast<T **>(&instance), nullptr, p))
- {
- hb_blob_destroy (blob_);
- goto retry;
- }
- blob = blob_;
- }
- return p;
- }
-
- inline const T* operator-> (void) const
- {
- return get();
- }
-
- private:
- hb_face_t *face;
- T *instance;
- mutable hb_blob_t *blob;
-};
-
-
-} /* namespace OT */
-
-
-#endif /* HB_OPEN_TYPE_PRIVATE_HH */