Move some code from hb-open-type-private.hh to hb-machinery-private.hh

src/Makefile.sources

@@ -16,6 +16,7 @@ HB_BASE_sources = \
 	hb-font.cc \
 	hb-map-private.hh \
 	hb-map.cc \
+	hb-machinery-private.hh \
 	hb-mutex-private.hh \
 	hb-object-private.hh \
 	hb-open-file-private.hh \

src/hb-machinery-private.hh

+/*
+ * 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"
+
+
+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);
+  }
+
+  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;
+};
+
+
+/*
+ * 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 */

src/hb-open-type-private.hh

@@ -32,492 +32,12 @@
 #include "hb-private.hh"
 #include "hb-blob-private.hh"
 #include "hb-face-private.hh"
+#include "hb-machinery-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);
-  }
-
-  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_, 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;
-};
-
-
 /*
  *
  * The OpenType Font File: Data Types
@@ -531,78 +51,6 @@ struct Supplier
  * 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
@@ -773,7 +221,6 @@ struct FixedVersion
 };
 
 
-
 /*
  * Template subclasses of Offset that do the dereferencing.
  * Use: (base+offset)
@@ -839,7 +286,6 @@ static inline Type& operator + (Base &base, OffsetTo<Type, OffsetType> &offset)
  * Array Types
  */
 
-
 /* TODO Use it in ArrayOf, HeadlessArrayOf, and other places around the code base?? */
 template <typename Type>
 struct UnsizedArrayOf
@@ -921,7 +367,6 @@ struct UnsizedOffsetListOf : UnsizedOffsetArrayOf<Type, OffsetType>
   }
 };
 
-
 /* An array with a number of elements. */
 template <typename Type, typename LenType=HBUINT16>
 struct ArrayOf
@@ -1074,7 +519,6 @@ struct OffsetListOf : OffsetArrayOf<Type>
   }
 };
 
-
 /* An array starting at second element. */
 template <typename Type, typename LenType=HBUINT16>
 struct HeadlessArrayOf
@@ -1139,10 +583,7 @@ struct HeadlessArrayOf
   DEFINE_SIZE_ARRAY (sizeof (LenType), arrayZ);
 };
 
-
-/*
- * An array with sorted elements.  Supports binary searching.
- */
+/* An array with sorted elements.  Supports binary searching. */
 template <typename Type, typename LenType=HBUINT16>
 struct SortedArrayOf : ArrayOf<Type, LenType>
 {
@@ -1167,10 +608,7 @@ struct SortedArrayOf : ArrayOf<Type, LenType>
   }
 };
 
-/*
- * Binary-search arrays
- */
-
+/* Binary-search arrays */
 struct BinSearchHeader
 {
   inline operator uint32_t (void) const { return len; }
@@ -1206,107 +644,6 @@ template <typename Type>
 struct BinSearchArrayOf : SortedArrayOf<Type, BinSearchHeader> {};
 
 
-/* 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 */