1 files changed, 85 insertions, 0 deletions
diff --git a/xpdf/Lexer.h b/xpdf/Lexer.h
new file mode 100644
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--- /dev/null
+++ b/xpdf/Lexer.h
@@ -0,0 +1,85 @@
+//========================================================================
+//
+// Lexer.h
+//
+// Copyright 1996-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+#ifndef LEXER_H
+#define LEXER_H
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma interface
+#endif
+
+#include "Object.h"
+#include "Stream.h"
+
+class XRef;
+
+#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(XRef *xref, Stream *str);
+
+  // Construct a lexer for a stream or array of streams (assumes obj
+  // is either a stream or array of streams).
+  Lexer(XRef *xref, 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 to the end of the input stream.
+  void skipToEOF();
+
+  // Skip over one character.
+  void skipChar() { getChar(); }
+
+  // Get stream index (for arrays of streams).
+  int getStreamIndex() { return strPtr; }
+
+  // Get stream.
+  Stream *getStream()
+    { return curStr.isNone() ? (Stream *)NULL : curStr.getStream(); }
+
+  // Get current position in file.
+  GFileOffset getPos()
+    { return curStr.isNone() ? -1 : curStr.streamGetPos(); }
+
+  // Set position in file.
+  void setPos(GFileOffset pos, int dir = 0)
+    { if (!curStr.isNone()) curStr.streamSetPos(pos, dir); }
+
+  // Returns true if <c> is a whitespace character.
+  static GBool isSpace(int c);
+
+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