IOBuffer.h

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/*
 * Copyright (C) 2015 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __LIB_LIBFS_IOBUFFER_H
#define __LIB_LIBFS_IOBUFFER_H
 
#include <Types.h>
#include <Macros.h>
#include <Memory.h>
#include "FileSystemMessage.h"
 
class IOBuffer
{
  public:
 
    IOBuffer();
 
    IOBuffer(const FileSystemMessage *msg);
 
    virtual ~IOBuffer();
 
    Size getCount() const;
 
    void addCount(const Size bytes);
 
    void setMessage(const FileSystemMessage *msg);
 
    const FileSystemMessage * getMessage() const;
 
    u8 * getBuffer();
 
    FileSystem::Result read(void *buffer,
                            const Size size,
                            const Size offset = ZERO);
 
    FileSystem::Result write(const void *buffer,
                             const Size size,
                             const Size offset = ZERO);
 
    FileSystem::Result bufferedRead();
 
    FileSystem::Result bufferedWrite(const void *buffer,
                                     const Size size);
 
    FileSystem::Result flushWrite();
 
    u8 operator[] (Size index) const;
 
  private:
 
    const FileSystemMessage *m_message;
 
    bool m_directMapped;
 
    Memory::Range m_directMapRange;
 
    u8 *m_buffer;
 
    Size m_size;
 
    Size m_count;
};
 
#endif /* __LIB_LIBFS_IOBUFFER_H */