IoBuffer.h

/*
-----------------------------------------------------------------------------
This source file is part of "esnetwork" library.
It is licensed under the terms of the BSD license.
For the latest info, see http://esnetwork.sourceforge.net

Copyright (c) 2012-2013 Lin Jia Jun (Joe Lam)
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/

#ifndef _ESN_IOBUFFER_H_
#define _ESN_IOBUFFER_H_

#include <deque>

#include "Buffer.h"
#include "Session.h"

#ifndef ESN_MAX_IOBUF_SIZE
#define ESN_MAX_IOBUF_SIZE     1024 * 1024 * 256
#endif

#ifndef ESN_DEFAULT_IOBUF_SIZE
#define ESN_DEFAULT_IOBUF_SIZE 2048
#endif

namespace esnlib
{

class IoBuffer : public Buffer
{
public:

    IoBuffer();

    IoBuffer(const char* buf, int bufsize);

    explicit IoBuffer(int size);

    explicit IoBuffer(const IoBuffer& src);

    virtual ~IoBuffer();

    const char* data() const;

    char* data();

    int size() const;

    int size(int value);

    int flag() const;

    void flag(int value);

    int code() const;

    void code(int value);

    int type() const;

    void type(int value);

    int state() const;

    void state(int value);

    bool anysize() const;

    SessionPtr session();

    void session(SessionPtr value);

    int GetReadPos();

    void SetReadPos(int pos);

    int GetWritePos();

    void SetWritePos(int pos);

    char GetByte();

    short GetShort();

    int GetInt();

    double GetDouble();

    int GetBuf(char* buf, int len);

    std::string GetStr(int len);

    void PutByte(char value);

    void PutShort(int value);

    void PutInt(int value);

    void PutDouble(double value);

    void PutBuf(char* buf, int len);

    void PutStr(const std::string& value);

protected:

private:
    char* m_data;

    int m_size;
    int m_max;

    int m_code;
    int m_flag;
    int m_type;
    int m_state;

    int m_default;

    int m_readpos;
    int m_writepos;

    SessionRef m_session;

};

typedef boost::shared_ptr<IoBuffer> IoBufferPtr;

typedef std::deque<IoBufferPtr> IoBufferQueue;

}

#endif // _ESN_IOBUFFER_H_