//========================================================================

//

// Parser.h

//

// Copyright 1996-2003 Glyph & Cog, LLC

//

//========================================================================

#ifndef PARSER_H

#define PARSER_H

#include <aconf.h>

#include "Lexer.h"

//------------------------------------------------------------------------

// Max number of nested objects.  This is used to catch infinite loops

// in the object structure.

#define objectRecursionLimit 500

//------------------------------------------------------------------------

// Parser

//------------------------------------------------------------------------

class Parser {

public:

  // Constructor.

  Parser(XRef *xrefA, Lexer *lexerA, GBool allowStreamsA);

  // Destructor.

  ~Parser();

  // Get the next object from the input stream.  If <simpleOnly> is

  // true, do not parse compound objects (arrays, dictionaries, or

  // streams).

  Object *getObj(Object *obj, GBool simpleOnly = gFalse,

     Guchar *fileKey = NULL,

     CryptAlgorithm encAlgorithm = cryptRC4, int keyLength = 0,

     int objNum = 0, int objGen = 0, int recursion = 0);

  // Get stream index (for arrays of streams).

  int getStreamIndex() { return lexer->getStreamIndex(); }

  // Get stream.

  Stream *getStream() { return lexer->getStream(); }

  // Get current position in file.

  GFileOffset getPos() { return lexer->getPos(); }

private:

  XRef *xref;     // the xref table for this PDF file

  Lexer *lexer;     // input stream

  GBool allowStreams;   // parse stream objects?

  Object buf1, buf2;    // next two tokens

  int inlineImg;    // set when inline image data is encountered

  Stream *makeStream(Object *dict, Guchar *fileKey,

         CryptAlgorithm encAlgorithm, int keyLength,

         int objNum, int objGen, int recursion);

  void shift();

};

#endif