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diff --git a/pdf/xpdf/UnicodeMap.h b/pdf/xpdf/UnicodeMap.h
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+//========================================================================
+//
+// UnicodeMap.h
+//
+// Mapping from Unicode to an encoding.
+//
+// Copyright 2001-2002 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef UNICODEMAP_H
+#define UNICODEMAP_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "gtypes.h"
+#include "CharTypes.h"
+
+class GString;
+
+//------------------------------------------------------------------------
+
+enum UnicodeMapKind {
+  unicodeMapUser,		// read from a file
+  unicodeMapResident,		// static list of ranges
+  unicodeMapFunc		// function pointer
+};
+
+typedef int (*UnicodeMapFunc)(Unicode u, char *buf, int bufSize);
+
+struct UnicodeMapRange {
+  Unicode start, end;		// range of Unicode chars
+  Guint code, nBytes;		// first output code
+};
+
+struct UnicodeMapExt;
+
+//------------------------------------------------------------------------
+
+class UnicodeMap {
+public:
+
+  // Create the UnicodeMap specified by <encodingName>.  Sets the
+  // initial reference count to 1.  Returns NULL on failure.
+  static UnicodeMap *parse(GString *encodingNameA);
+
+  // Create a resident UnicodeMap.
+  UnicodeMap(char *encodingNameA,
+	     UnicodeMapRange *rangesA, int lenA);
+
+  // Create a resident UnicodeMap that uses a function instead of a
+  // list of ranges.
+  UnicodeMap(char *encodingNameA, UnicodeMapFunc funcA);
+
+  ~UnicodeMap();
+
+  void incRefCnt();
+  void decRefCnt();
+
+  GString *getEncodingName() { return encodingName; }
+
+  // Return true if this UnicodeMap matches the specified
+  // <encodingNameA>.
+  GBool match(GString *encodingNameA);
+
+  // Map Unicode to the target encoding.  Fills in <buf> with the
+  // output and returns the number of bytes used.  Output will be
+  // truncated at <bufSize> bytes.  No string terminator is written.
+  // Returns 0 if no mapping is found.
+  int mapUnicode(Unicode u, char *buf, int bufSize);
+
+private:
+
+  UnicodeMap(GString *encodingNameA);
+
+  GString *encodingName;
+  UnicodeMapKind kind;
+  union {
+    UnicodeMapRange *ranges;	// (user, resident)
+    UnicodeMapFunc func;	// (func)
+  };
+  int len;			// (user, resident)
+  UnicodeMapExt *eMaps;		// (user)
+  int eMapsLen;			// (user)
+  int refCnt;
+};
+
+//------------------------------------------------------------------------
+
+#define unicodeMapCacheSize 4
+
+class UnicodeMapCache {
+public:
+
+  UnicodeMapCache();
+  ~UnicodeMapCache();
+
+  // Get the UnicodeMap for <encodingName>.  Increments its reference
+  // count; there will be one reference for the cache plus one for the
+  // caller of this function.  Returns NULL on failure.
+  UnicodeMap *getUnicodeMap(GString *encodingName);
+
+private:
+
+  UnicodeMap *cache[unicodeMapCacheSize];
+};
+
+#endif