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/********************************************************************************
* *
* I / O B u f f e r C l a s s *
* *
*********************************************************************************
* Copyright (C) 2005,2022 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 FXIOBUFFER_H
#define FXIOBUFFER_H
#ifndef FXIO_H
#include "FXIO.h"
#endif
namespace FX {
/**
* IOBuffer provides a file-interface to a memory-buffer of a given size.
*/
class FXAPI FXIOBuffer : public FXIO {
protected:
FXuchar *buffer; // Memory buffer
FXuval pointer; // Stream pointer
FXuval space; // Space in buffer
private:
FXIOBuffer(const FXIOBuffer&);
FXIOBuffer &operator=(const FXIOBuffer&);
public:
/// Construct
FXIOBuffer();
/// Construct and open
FXIOBuffer(FXuchar* ptr,FXuval sz);
/// Open buffer
virtual FXbool open(FXuchar* ptr,FXuval sz);
/// Obtain pointer to buffer
FXuchar* data() const { return buffer; }
/// Return true if open
virtual FXbool isOpen() const;
/// Return true if serial access only
virtual FXbool isSerial() const;
/// Get current buffer position
virtual FXlong position() const;
/// Change buffer position, returning new position from start
virtual FXlong position(FXlong offset,FXuint from=FXIO::Begin);
/// Read block of bytes, returning number of bytes read
virtual FXival readBlock(void* ptr,FXival count);
/// Write block of bytes, returning number of bytes written
virtual FXival writeBlock(const void* ptr,FXival count);
/// Truncate size of the buffer
virtual FXlong truncate(FXlong sz);
/// Flush to disk
virtual FXbool flush();
/// Test if we're at the end; -1 if error
virtual FXint eof();
/// Return size of the buffer
virtual FXlong size();
/// Close handle
virtual FXbool close();
/// Destroy and close
virtual ~FXIOBuffer();
};
}
#endif
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