FXMappedFile.h

/********************************************************************************
*                                                                               *
*                      M a p p e d   F i l e   C l a s s                        *
*                                                                               *
*********************************************************************************
* Copyright (C) 2023,2024 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXMAPPEDFILE_H
#define FXMAPPEDFILE_H

#ifndef FXFILE_H
#include "FXFile.h"
#endif


namespace FX {


class FXAPI FXMappedFile : public FXIODevice {
private:
  FXInputHandle memhandle;      // Handle for the map
  FXptr         mempointer;     // Memory base where it is mapped
  FXlong        memlength;      // Length of the map
  FXlong        memoffset;      // Offset of the map
private:
  FXMappedFile(const FXMappedFile&);
  FXMappedFile &operator=(const FXMappedFile&);
public:

  FXMappedFile();

  FXptr open(const FXString& filename,FXuint m=FXIO::Reading,FXuint perm=FXIO::AllReadWrite,FXlong len=0,FXlong off=0);

  virtual FXbool isSerial() const;

  FXptr data() const { return mempointer; }

  FXival length() const { return (FXival)memlength; }

  FXlong offset() const { return memoffset; }

  virtual FXlong size();

  virtual FXbool flush();

  virtual FXbool close();

  static FXival granularity();

  virtual ~FXMappedFile();
  };

}

#endif