/usr/include/podofo/base/PdfFileStream.h is in libpodofo-dev 0.9.4-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2007 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_FILE_STREAM_H_
#define _PDF_FILE_STREAM_H_
#include "PdfDefines.h"
#include "PdfStream.h"
namespace PoDoFo {
class PdfOutputStream;
/** A PDF stream can be appended to any PdfObject
* and can contain arbitrary data.
*
* Most of the time it will contain either drawing commands
* to draw onto a page or binary data like a font or an image.
*
* A PdfFileStream writes all data directly to an output device
* without keeping it in memory.
* PdfFileStream is used automatically when creating PDF files
* using PdfImmediateWriter.
*
* \see PdfVecObjects
* \see PdfStream
* \see PdfMemoryStream
* \see PdfFileStream
*/
class PODOFO_API PdfFileStream : public PdfStream {
public:
/** Create a new PdfFileStream object which has a parent PdfObject.
* The stream will be deleted along with the parent.
* This constructor will be called by PdfObject::Stream() for you.
*
* \param pParent parent object
* \param pDevice output device
*/
PdfFileStream( PdfObject* pParent, PdfOutputDevice* pDevice );
virtual ~PdfFileStream();
/** Set an encryption object which is used to encrypt
* all data written to this stream.
*
* \param pEncrypt an encryption object or NULL if no encryption should be done
*/
void SetEncrypted( PdfEncrypt* pEncrypt );
/** Write the stream to an output device
* \param pDevice write to this outputdevice.
* \param pEncrypt encrypt stream data using this object
*/
virtual void Write( PdfOutputDevice* pDevice, PdfEncrypt* pEncrypt = NULL );
/** Get a malloced buffer of the current stream.
* No filters will be applied to the buffer, so
* if the stream is Flate compressed the compressed copy
* will be returned.
*
* The caller has to podofo_free() the buffer.
*
* This is currently not implemented for PdfFileStreams
* and will raise an ePdfError_InternalLogic exception
*
* \param pBuffer pointer to the buffer address (output parameter)
* \param lLen pointer to the buffer length (output parameter)
*/
virtual void GetCopy( char** pBuffer, pdf_long* lLen ) const;
/** Get a copy of a the stream and write it to a PdfOutputStream
*
* \param pStream data is written to this stream.
*/
virtual void GetCopy( PdfOutputStream* pStream ) const;
/** Get the streams length with all filters applied (eg the compressed
* length of a Flate compressed stream).
*
* \returns the length of the stream with all filters applied
*/
inline virtual pdf_long GetLength() const;
protected:
/** Required for the GetFilteredCopy implementation
* \returns a handle to the internal buffer
*/
inline virtual const char* GetInternalBuffer() const;
/** Required for the GetFilteredCopy implementation
* \returns the size of the internal buffer
*/
inline virtual pdf_long GetInternalBufferSize() const;
/** Begin appending data to this stream.
* Clears the current stream contents.
*
* \param vecFilters use this filters to encode any data written to the stream.
*/
virtual void BeginAppendImpl( const TVecFilters & vecFilters );
/** Append a binary buffer to the current stream contents.
*
* \param pszString a buffer
* \param lLen length of the buffer
*
* \see BeginAppend
* \see Append
* \see EndAppend
*/
virtual void AppendImpl( const char* pszString, size_t lLen );
/** Finish appending data to the stream
*/
virtual void EndAppendImpl();
private:
PdfOutputDevice* m_pDevice;
PdfOutputStream* m_pStream;
PdfOutputStream* m_pDeviceStream;
PdfOutputStream* m_pEncryptStream;
pdf_long m_lLenInitial;
pdf_long m_lLength;
PdfObject* m_pLength;
PdfEncrypt* m_pCurEncrypt;
};
// -----------------------------------------------------
//
// -----------------------------------------------------
pdf_long PdfFileStream::GetLength() const
{
return m_lLength;
}
// -----------------------------------------------------
//
// -----------------------------------------------------
const char* PdfFileStream::GetInternalBuffer() const
{
return NULL;
}
// -----------------------------------------------------
//
// -----------------------------------------------------
pdf_long PdfFileStream::GetInternalBufferSize() const
{
return 0;
}
};
#endif // _PDF_FILE_STREAM_H_
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