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): ______________________________________.
 *
 * $Revision: 26950 $
 * $Author: rjongbloed $
 * $Date: 2012-02-08 13:37:08 +1100 (Wed, 08 Feb 2012) $
 */

#ifndef PTLIB_PMEMFILE_H
#define PTLIB_PMEMFILE_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif


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

    PMemoryFile(
      const PBYTEArray & data  
    );

    ~PMemoryFile();


    Comparison Compare(
      const PObject & obj   
    ) const;


    virtual PBoolean Open(
      OpenMode mode = ReadWrite,  // Mode in which to open the file.
      int opts = ModeDefault      // Options for open operation.
    );

    virtual PBoolean Open(
      const PFilePath & name,    // Name of file to open.
      OpenMode mode = ReadWrite, // Mode in which to open the file.
      int opts = ModeDefault     // <code>OpenOptions</code> enum# for open operation.
    );
      
    virtual PBoolean Close();

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

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


    virtual off_t GetLength() const;
      
    virtual PBoolean SetLength(
      off_t len   
    );

    virtual PBoolean SetPosition(
      off_t pos,                         
      FilePositionOrigin origin = Start  
    );

    virtual off_t GetPosition() const;


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


  protected:
    PBYTEArray m_data;
    off_t      m_position;
};


#endif // PTLIB_PMEMFILE_H


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