/usr/include/podofo/base/PdfXRefStreamParserObject.h is in libpodofo-dev 0.9.3-4.
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* Copyright (C) 2009 by Dominik Seichter *
* domseichter@web.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* In addition, as a special exception, the copyright holders give *
* permission to link the code of portions of this program with the *
* OpenSSL library under certain conditions as described in each *
* individual source file, and distribute linked combinations *
* including the two. *
* You must obey the GNU General Public License in all respects *
* for all of the code used other than OpenSSL. If you modify *
* file(s) with this exception, you may extend this exception to your *
* version of the file(s), but you are not obligated to do so. If you *
* do not wish to do so, delete this exception statement from your *
* version. If you delete this exception statement from all source *
* files in the program, then also delete it here. *
***************************************************************************/
#ifndef _PDF_XREF_STREAM_PARSER_OBJECT_H_
#define _PDF_XREF_STREAM_PARSER_OBJECT_H_
#include "PdfDefines.h"
#include "PdfParserObject.h"
#define W_ARRAY_SIZE 3
#define W_MAX_BYTES 4
namespace PoDoFo {
/**
* A utility class for PdfParser that can parse
* an XRef stream object.
*
* It is mainly here to make PdfParser more modular.
*/
class PdfXRefStreamParserObject : public PdfParserObject {
public:
/** Parse the object data from the given file handle starting at
* the current position.
* \param pCreator pointer to a PdfVecObjects to resolve object references
* \param rDevice an open reference counted input device which is positioned in
* front of the object which is going to be parsed.
* \param rBuffer buffer to use for parsing to avoid reallocations
* \param pOffsets XRef entries are stored into this array
*/
PdfXRefStreamParserObject(PdfVecObjects* pCreator, const PdfRefCountedInputDevice & rDevice,
const PdfRefCountedBuffer & rBuffer, PdfParser::TVecOffsets* pOffsets );
~PdfXRefStreamParserObject();
void Parse();
void ReadXRefTable();
/**
* \returns true if there is a previous XRefStream
*/
inline bool HasPrevious();
/**
* \returns the offset of the previous XRef table
*/
inline pdf_long GetPreviousOffset();
private:
/**
* Read the /Index key from the current dictionary
* and write uit to a vector.
*
* \param rvecIndeces store the indeces hare
* \param size default value from /Size key
*/
void GetIndeces( std::vector<pdf_int64> & rvecIndeces, pdf_int64 size );
/**
* Parse the stream contents
*
* \param nW /W key
* \param rvecIndeces indeces as filled by GetIndeces
*
* \see GetIndeces
*/
void ParseStream( const pdf_int64 nW[W_ARRAY_SIZE], const std::vector<pdf_int64> & rvecIndeces );
void ReadXRefStreamEntry( char* pBuffer, pdf_long, const pdf_int64 lW[W_ARRAY_SIZE], int nObjNo );
private:
pdf_long m_lNextOffset;
PdfParser::TVecOffsets* m_pOffsets;
};
// -----------------------------------------------------
//
// -----------------------------------------------------
inline bool PdfXRefStreamParserObject::HasPrevious()
{
return (m_lNextOffset != -1);
}
// -----------------------------------------------------
//
// -----------------------------------------------------
inline pdf_long PdfXRefStreamParserObject::GetPreviousOffset()
{
return m_lNextOffset;
}
};
#endif // _PDF_XREF_STREAM_PARSER_OBJECT_H_
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