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diff --git a/pdf/xpdf/Lexer.h b/pdf/xpdf/Lexer.h
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+//========================================================================
+//
+// Lexer.h
+//
+// Copyright 1996 Derek B. Noonburg
+//
+//========================================================================
+
+#ifndef LEXER_H
+#define LEXER_H
+
+#ifdef __GNUC__
+#pragma interface
+#endif
+
+#include "Object.h"
+#include "Stream.h"
+
+#define tokBufSize 128		// size of token buffer
+
+//------------------------------------------------------------------------
+// Lexer
+//------------------------------------------------------------------------
+
+class Lexer {
+public:
+
+  // Construct a lexer for a single stream.  Deletes the stream when
+  // lexer is deleted.
+  Lexer(Stream *str);
+
+  // Construct a lexer for a stream or array of streams (assumes obj
+  // is either a stream or array of streams).
+  Lexer(Object *obj);
+
+  // Destructor.
+  ~Lexer();
+
+  // Get the next object from the input stream.
+  Object *getObj(Object *obj);
+
+  // Skip to the beginning of the next line in the input stream.
+  void skipToNextLine();
+
+  // Skip over one character.
+  void skipChar() { getChar(); }
+
+  // Get stream.
+  Stream *getStream()
+    { return curStr.isNone() ? (Stream *)NULL : curStr.getStream(); }
+
+  // Get current position in file.
+  int getPos()
+    { return curStr.isNone() ? -1 : curStr.streamGetPos(); }
+
+  // Set position in file.
+  void setPos(int pos)
+    { if (!curStr.isNone()) curStr.streamSetPos(pos); }
+
+private:
+
+  int getChar();
+  int lookChar();
+
+  Array *streams;		// array of input streams
+  int strPtr;			// index of current stream
+  Object curStr;		// current stream
+  GBool freeArray;		// should lexer free the streams array?
+  char tokBuf[tokBufSize];	// temporary token buffer
+};
+
+#endif