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Diffstat (limited to 'kpdf/xpdf/xpdf/Lexer.h')
-rw-r--r-- | kpdf/xpdf/xpdf/Lexer.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/kpdf/xpdf/xpdf/Lexer.h b/kpdf/xpdf/xpdf/Lexer.h new file mode 100644 index 00000000..3333be9f --- /dev/null +++ b/kpdf/xpdf/xpdf/Lexer.h @@ -0,0 +1,82 @@ +//======================================================================== +// +// 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 *xrefA, Stream *str); + + // Construct a lexer for a stream or array of streams (assumes obj + // is either a stream or array of streams). + Lexer(XRef *xrefA, Object *obj); + + // Destructor. + ~Lexer(); + + // Get the next object from the input stream. + Object *getObj(Object *obj, int objNum = -1); + + // 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 + + XRef *xref; +}; + +#endif |