moved ../../pdf2swf/xpdf to .

[swftools.git] / lib / xpdf / Lexer.h

diff --git a/lib/xpdf/Lexer.h b/lib/xpdf/Lexer.h
new file mode 100644 (file)
index 0000000..f6ad9ce
--- /dev/null
+++ b/lib/xpdf/Lexer.h
@@ -0,0 +1,80 @@
+//========================================================================
+//
+// 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 over one character.
+  void skipChar() { getChar(); }
+
+  // Get stream.
+  Stream *getStream()
+    { return curStr.isNone() ? (Stream *)NULL : curStr.getStream(); }
+
+  // Get current position in file.  This is only used for error
+  // messages, so it returns an int instead of a Guint.
+  int getPos()
+    { return curStr.isNone() ? -1 : (int)curStr.streamGetPos(); }
+
+  // Set position in file.
+  void setPos(Guint 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