memfile.h

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/*
 * memfile.h
 *
 * WAV file I/O channel class.
 *
 * Portable Windows Library
 *
 * Copyright (c) 2002 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is
 * Equivalence Pty Ltd
 *
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: memfile.h,v $
 * Revision 1.7  2007/04/18 23:49:50  csoutheren
 * Add usage of precompiled headers
 *
 * Revision 1.6  2005/11/30 12:47:37  csoutheren
 * Removed tabs, reformatted some code, and changed tags for Doxygen
 *
 * Revision 1.5  2004/11/11 07:34:50  csoutheren
 * Added #include <ptlib.h>
 *
 * Revision 1.4  2002/09/16 01:08:59  robertj
 * Added #define so can select if #pragma interface/implementation is used on
 *   platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan.
 *
 * Revision 1.3  2002/08/05 05:40:45  robertj
 * Fixed missing pragma interface/implementation
 *
 * Revision 1.2  2002/06/27 03:53:35  robertj
 * Cleaned up documentation and added Compare() function.
 *
 * Revision 1.1  2002/06/26 09:01:19  craigs
 * Initial version
 *
 */

#ifndef _PMEMFILE
#define _PMEMFILE

#ifdef P_USE_PRAGMA
#pragma interface
#endif

#ifndef _PTLIB_H
#include <ptlib.h>
#endif

class PMemoryFile : public PFile
{
  PCLASSINFO(PMemoryFile, PFile);
  public:
    PMemoryFile();

    PMemoryFile(
      const PBYTEArray & data  
    );


    Comparison Compare(
      const PObject & obj   
    ) const;


    virtual BOOL Read(
      void * buf,   
      PINDEX len    
    );

    virtual BOOL Write(
      const void * buf, 
      PINDEX len        
    );


    off_t GetLength() const;
      
    BOOL SetLength(
      off_t len   
    );

    BOOL SetPosition(
      off_t pos,                         
      FilePositionOrigin origin = Start  
    );

    off_t GetPosition() const;


    const PBYTEArray & GetData() const { return data; }


  protected:
    PBYTEArray data;
    off_t position;
};


#endif // _PMEMFILE


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