harfbuzz: check in harfbuzz-ng, add gyp define to use it

third_party/harfbuzz-ng/src/hb-open-file-private.hh

+/*
+ * Copyright (C) 2007,2008,2009  Red Hat, 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
+ */
+
+#ifndef HB_OPEN_FILE_PRIVATE_HH
+#define HB_OPEN_FILE_PRIVATE_HH
+
+#include "hb-open-type-private.hh"
+
+HB_BEGIN_DECLS
+
+
+/*
+ *
+ * The OpenType Font File
+ *
+ */
+
+
+/*
+ * Organization of an OpenType Font
+ */
+
+struct OpenTypeFontFile;
+struct OffsetTable;
+struct TTCHeader;
+
+
+typedef struct TableRecord
+{
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    return c->check_struct (this);
+  }
+
+  Tag           tag;            /* 4-byte identifier. */
+  CheckSum      checkSum;       /* CheckSum for this table. */
+  ULONG         offset;         /* Offset from beginning of TrueType font
+                                 * file. */
+  ULONG         length;         /* Length of this table. */
+  public:
+  DEFINE_SIZE_STATIC (16);
+} OpenTypeTable;
+
+typedef struct OffsetTable
+{
+  friend struct OpenTypeFontFile;
+
+  inline unsigned int get_table_count (void) const
+  { return numTables; }
+  inline const TableRecord& get_table (unsigned int i) const
+  {
+    if (unlikely (i >= numTables)) return Null(TableRecord);
+    return tables[i];
+  }
+  inline bool find_table_index (hb_tag_t tag, unsigned int *table_index) const
+  {
+    Tag t;
+    t.set (tag);
+    unsigned int count = numTables;
+    for (unsigned int i = 0; i < count; i++)
+    {
+      if (t == tables[i].tag)
+      {
+        if (table_index) *table_index = i;
+        return true;
+      }
+    }
+    if (table_index) *table_index = Index::NOT_FOUND_INDEX;
+    return false;
+  }
+  inline const TableRecord& get_table_by_tag (hb_tag_t tag) const
+  {
+    unsigned int table_index;
+    find_table_index (tag, &table_index);
+    return get_table (table_index);
+  }
+
+  public:
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    return c->check_struct (this)
+        && c->check_array (tables, TableRecord::static_size, numTables);
+  }
+
+  private:
+  Tag           sfnt_version;   /* '\0\001\0\00' if TrueType / 'OTTO' if CFF */
+  USHORT        numTables;      /* Number of tables. */
+  USHORT        searchRange;    /* (Maximum power of 2 <= numTables) x 16 */
+  USHORT        entrySelector;  /* Log2(maximum power of 2 <= numTables). */
+  USHORT        rangeShift;     /* NumTables x 16-searchRange. */
+  TableRecord   tables[VAR];    /* TableRecord entries. numTables items */
+  public:
+  DEFINE_SIZE_ARRAY (12, tables);
+} OpenTypeFontFace;
+
+
+/*
+ * TrueType Collections
+ */
+
+struct TTCHeaderVersion1
+{
+  friend struct TTCHeader;
+
+  inline unsigned int get_face_count (void) const { return table.len; }
+  inline const OpenTypeFontFace& get_face (unsigned int i) const { return this+table[i]; }
+
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    return table.sanitize (c, this);
+  }
+
+  private:
+  Tag           ttcTag;         /* TrueType Collection ID string: 'ttcf' */
+  FixedVersion  version;        /* Version of the TTC Header (1.0),
+                                 * 0x00010000 */
+  LongOffsetLongArrayOf<OffsetTable>
+                table;          /* Array of offsets to the OffsetTable for each font
+                                 * from the beginning of the file */
+  public:
+  DEFINE_SIZE_ARRAY (12, table);
+};
+
+struct TTCHeader
+{
+  friend struct OpenTypeFontFile;
+
+  private:
+
+  inline unsigned int get_face_count (void) const
+  {
+    switch (u.header.version) {
+    case 2: /* version 2 is compatible with version 1 */
+    case 1: return u.version1.get_face_count ();
+    default:return 0;
+    }
+  }
+  inline const OpenTypeFontFace& get_face (unsigned int i) const
+  {
+    switch (u.header.version) {
+    case 2: /* version 2 is compatible with version 1 */
+    case 1: return u.version1.get_face (i);
+    default:return Null(OpenTypeFontFace);
+    }
+  }
+
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    if (unlikely (!u.header.version.sanitize (c))) return false;
+    switch (u.header.version) {
+    case 2: /* version 2 is compatible with version 1 */
+    case 1: return u.version1.sanitize (c);
+    default:return true;
+    }
+  }
+
+  private:
+  union {
+  struct {
+  Tag           ttcTag;         /* TrueType Collection ID string: 'ttcf' */
+  FixedVersion  version;        /* Version of the TTC Header (1.0 or 2.0),
+                                 * 0x00010000 or 0x00020000 */
+  }                     header;
+  TTCHeaderVersion1     version1;
+  } u;
+};
+
+
+/*
+ * OpenType Font File
+ */
+
+struct OpenTypeFontFile
+{
+  static const hb_tag_t CFFTag          = HB_TAG ('O','T','T','O'); /* OpenType with Postscript outlines */
+  static const hb_tag_t TrueTypeTag     = HB_TAG ( 0 , 1 , 0 , 0 ); /* OpenType with TrueType outlines */
+  static const hb_tag_t TTCTag          = HB_TAG ('t','t','c','f'); /* TrueType Collection */
+  static const hb_tag_t TrueTag         = HB_TAG ('t','r','u','e'); /* Obsolete Apple TrueType */
+  static const hb_tag_t Typ1Tag         = HB_TAG ('t','y','p','1'); /* Obsolete Apple Type1 font in SFNT container */
+
+  inline hb_tag_t get_tag (void) const { return u.tag; }
+
+  inline unsigned int get_face_count (void) const
+  {
+    switch (u.tag) {
+    case CFFTag:        /* All the non-collection tags */
+    case TrueTag:
+    case Typ1Tag:
+    case TrueTypeTag:   return 1;
+    case TTCTag:        return u.ttcHeader.get_face_count ();
+    default:            return 0;
+    }
+  }
+  inline const OpenTypeFontFace& get_face (unsigned int i) const
+  {
+    switch (u.tag) {
+    /* Note: for non-collection SFNT data we ignore index.  This is because
+     * Apple dfont container is a container of SFNT's.  So each SFNT is a
+     * non-TTC, but the index is more than zero. */
+    case CFFTag:        /* All the non-collection tags */
+    case TrueTag:
+    case Typ1Tag:
+    case TrueTypeTag:   return u.fontFace;
+    case TTCTag:        return u.ttcHeader.get_face (i);
+    default:            return Null(OpenTypeFontFace);
+    }
+  }
+
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    if (unlikely (!u.tag.sanitize (c))) return false;
+    switch (u.tag) {
+    case CFFTag:        /* All the non-collection tags */
+    case TrueTag:
+    case Typ1Tag:
+    case TrueTypeTag:   return u.fontFace.sanitize (c);
+    case TTCTag:        return u.ttcHeader.sanitize (c);
+    default:            return true;
+    }
+  }
+
+  private:
+  union {
+  Tag                   tag;            /* 4-byte identifier. */
+  OpenTypeFontFace      fontFace;
+  TTCHeader             ttcHeader;
+  } u;
+  public:
+  DEFINE_SIZE_UNION (4, tag);
+};
+
+
+HB_END_DECLS
+
+#endif /* HB_OPEN_FILE_PRIVATE_HH */