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diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-machinery-private.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-machinery-private.hh
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+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-machinery-private.hh
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+/*
+ * Copyright © 2007,2008,2009,2010 Red Hat, Inc.
+ * Copyright © 2012,2018 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_MACHINERY_PRIVATE_HH
+#define HB_MACHINERY_PRIVATE_HH
+
+#include "hb-private.hh"
+#include "hb-iter-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)
+
+
+/*
+ * 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
+#ifndef HB_SANITIZE_MAX_OPS_FACTOR
+#define HB_SANITIZE_MAX_OPS_FACTOR 8
+#endif
+#ifndef HB_SANITIZE_MAX_OPS_MIN
+#define HB_SANITIZE_MAX_OPS_MIN 16384
+#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), max_ops (0),
+ blob (nullptr),
+ num_glyphs (65536),
+ num_glyphs_set (false) {}
+
+ 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 set_num_glyphs (unsigned int num_glyphs_)
+ {
+ num_glyphs = num_glyphs_;
+ num_glyphs_set = true;
+ }
+ inline unsigned int get_num_glyphs (void) { return num_glyphs; }
+
+ inline void start_processing (void)
+ {
+ this->start = hb_blob_get_data (this->blob, nullptr);
+ this->end = this->start + this->blob->length;
+ assert (this->start <= this->end); /* Must not overflow. */
+ this->max_ops = MAX ((unsigned int) (this->end - this->start) * HB_SANITIZE_MAX_OPS_FACTOR,
+ (unsigned) HB_SANITIZE_MAX_OPS_MIN);
+ 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->max_ops-- > 0 &&
+ 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_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, unsigned int len)
+ {
+ 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;
+ }
+
+ template <typename Type>
+ inline hb_blob_t *sanitize_blob (hb_blob_t *blob)
+ {
+ bool sane;
+
+ init (blob);
+
+ retry:
+ DEBUG_MSG_FUNC (SANITIZE, start, "start");
+
+ start_processing ();
+
+ if (unlikely (!start))
+ {
+ end_processing ();
+ return blob;
+ }
+
+ Type *t = CastP<Type> (const_cast<char *> (start));
+
+ sane = t->sanitize (this);
+ if (sane)
+ {
+ if (edit_count)
+ {
+ DEBUG_MSG_FUNC (SANITIZE, start, "passed first round with %d edits; going for second round", edit_count);
+
+ /* sanitize again to ensure no toe-stepping */
+ edit_count = 0;
+ sane = t->sanitize (this);
+ if (edit_count) {
+ DEBUG_MSG_FUNC (SANITIZE, start, "requested %d edits in second round; FAILLING", edit_count);
+ sane = false;
+ }
+ }
+ }
+ else
+ {
+ if (edit_count && !writable) {
+ start = hb_blob_get_data_writable (blob, nullptr);
+ end = start + blob->length;
+
+ if (start)
+ {
+ writable = true;
+ /* ok, we made it writable by relocating. try again */
+ DEBUG_MSG_FUNC (SANITIZE, start, "retry");
+ goto retry;
+ }
+ }
+ }
+
+ end_processing ();
+
+ DEBUG_MSG_FUNC (SANITIZE, start, sane ? "PASSED" : "FAILED");
+ if (sane)
+ {
+ blob->lock ();
+ return blob;
+ }
+ else
+ {
+ hb_blob_destroy (blob);
+ return hb_blob_get_empty ();
+ }
+ }
+
+ template <typename Type>
+ inline hb_blob_t *reference_table (const hb_face_t *face, hb_tag_t tableTag = Type::tableTag)
+ {
+ if (!num_glyphs_set)
+ set_num_glyphs (face->get_num_glyphs ());
+ return sanitize_blob<Type> (face->reference_table (tableTag));
+ }
+
+ mutable unsigned int debug_depth;
+ const char *start, *end;
+ private:
+ bool writable;
+ unsigned int edit_count;
+ mutable int max_ops;
+ hb_blob_t *blob;
+ unsigned int num_glyphs;
+ bool num_glyphs_set;
+};
+
+
+/*
+ * 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);
+ }
+
+ unsigned int debug_depth;
+ char *start, *end, *head;
+ bool ran_out_of_room;
+};
+
+
+/*
+ * Supplier
+ */
+
+template <typename Type>
+struct Supplier
+{
+ inline Supplier (const Type *array, unsigned int len_, unsigned int stride_=sizeof(Type))
+ {
+ head = array;
+ len = len_;
+ stride = stride_;
+ }
+ inline const Type operator [] (unsigned int i) const
+ {
+ if (unlikely (i >= len)) return Type ();
+ return * (const Type *) (const void *) ((const char *) head + stride * i);
+ }
+
+ inline Supplier<Type> & operator += (unsigned int count)
+ {
+ if (unlikely (count > len))
+ count = len;
+ len -= count;
+ head = (const Type *) (const void *) ((const char *) head + stride * count);
+ return *this;
+ }
+
+ private:
+ inline Supplier (const Supplier<Type> &); /* Disallow copy */
+ inline Supplier<Type>& operator= (const Supplier<Type> &); /* Disallow copy */
+
+ unsigned int len;
+ unsigned int stride;
+ const Type *head;
+};
+
+
+/*
+ * Big-endian integers.
+ */
+
+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];
+};
+
+
+/*
+ * Lazy struct and blob loaders.
+ */
+
+/* Logic is shared between hb_lazy_loader_t and hb_table_lazy_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 != &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 *> (&Null(T));
+ else
+ p->init (face);
+ if (unlikely (!hb_atomic_ptr_cmpexch (const_cast<T **>(&instance), nullptr, p)))
+ {
+ if (p != &Null(T))
+ p->fini ();
+ goto retry;
+ }
+ }
+ return p;
+ }
+
+ inline const T* operator-> (void) const
+ {
+ return get ();
+ }
+
+ private:
+ hb_face_t *face;
+ mutable T *instance;
+};
+
+/* Logic is shared between hb_lazy_loader_t and hb_table_lazy_loader_t */
+template <typename T>
+struct hb_table_lazy_loader_t
+{
+ inline void init (hb_face_t *face_)
+ {
+ face = face_;
+ blob = nullptr;
+ }
+
+ inline void fini (void)
+ {
+ hb_blob_destroy (blob);
+ }
+
+ inline hb_blob_t* get_blob (void) const
+ {
+ retry:
+ hb_blob_t *b = (hb_blob_t *) hb_atomic_ptr_get (&blob);
+ if (unlikely (!b))
+ {
+ b = OT::hb_sanitize_context_t().reference_table<T> (face);
+ if (!hb_atomic_ptr_cmpexch (&blob, nullptr, b))
+ {
+ hb_blob_destroy (b);
+ goto retry;
+ }
+ blob = b;
+ }
+ return b;
+ }
+
+ inline const T* get (void) const
+ {
+ hb_blob_t *b = get_blob ();
+ return b->as<T> ();
+ }
+
+ inline const T* operator-> (void) const
+ {
+ return get();
+ }
+
+ private:
+ hb_face_t *face;
+ mutable hb_blob_t *blob;
+};
+
+
+} /* namespace OT */
+
+
+#endif /* HB_MACHINERY_PRIVATE_HH */