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+//========================================================================
+//
+// CharCodeToUnicode.h
+//
+// Mapping from character codes to Unicode.
+//
+// Copyright 2001-2002 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef CHARCODETOUNICODE_H
+#define CHARCODETOUNICODE_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "CharTypes.h"
+
+struct CharCodeToUnicodeString;
+
+//------------------------------------------------------------------------
+
+class CharCodeToUnicode {
+public:
+
+  // Create the CID-to-Unicode mapping specified by <collection>.
+  // This reads a .cidToUnicode file from disk.  Sets the initial
+  // reference count to 1.  Returns NULL on failure.
+  static CharCodeToUnicode *parseCIDToUnicode(GString *collectionA);
+
+  // Create the CharCode-to-Unicode mapping for an 8-bit font.
+  // <toUnicode> is an array of 256 Unicode indexes.  Sets the initial
+  // reference count to 1.
+  static CharCodeToUnicode *make8BitToUnicode(Unicode *toUnicode);
+
+  // Parse a ToUnicode CMap for an 8- or 16-bit font.
+  static CharCodeToUnicode *parseCMap(GString *buf, int nBits);
+
+  ~CharCodeToUnicode();
+
+  void incRefCnt();
+  void decRefCnt();
+
+  // Return true if this mapping matches the specified <collectionA>.
+  GBool match(GString *collectionA);
+
+  // Map a CharCode to Unicode.
+  int mapToUnicode(CharCode c, Unicode *u, int size);
+
+private:
+
+  void parseCMap1(int (*getCharFunc)(void *), void *data, int nBits);
+  CharCodeToUnicode(GString *collectionA);
+  CharCodeToUnicode(GString *collectionA, Unicode *mapA,
+		    CharCode mapLenA, GBool copyMap,
+		    CharCodeToUnicodeString *sMapA, int sMapLenA);
+
+  GString *collection;
+  Unicode *map;
+  CharCode mapLen;
+  CharCodeToUnicodeString *sMap;
+  int sMapLen, sMapSize;
+  int refCnt;
+};
+
+//------------------------------------------------------------------------
+
+#define cidToUnicodeCacheSize 4
+
+class CIDToUnicodeCache {
+public:
+
+  CIDToUnicodeCache();
+  ~CIDToUnicodeCache();
+
+  // Get the CharCodeToUnicode object for <collection>.  Increments
+  // its reference count; there will be one reference for the cache
+  // plus one for the caller of this function.  Returns NULL on
+  // failure.
+  CharCodeToUnicode *getCIDToUnicode(GString *collection);
+
+private:
+
+  CharCodeToUnicode *cache[cidToUnicodeCacheSize];
+};
+
+#endif