urho3d/Engine/Common/VectorBuffer.h

//
// Urho3D Engine
// Copyright (c) 2008-2011 Lasse Öörni
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#ifndef COMMON_VECTORBUFFER_H
#define COMMON_VECTORBUFFER_H

#include "Deserializer.h"
#include "Serializer.h"

#include <cstdio>
#include <vector>

//! A dynamically sized buffer that can be read and written to as a stream
class VectorBuffer : public Deserializer, public Serializer
{
public:
    //! Construct an empty buffer
    VectorBuffer();
    //! Construct from another buffer
    VectorBuffer(const std::vector<unsigned char>& data);
    //! Construct from a memory area
    VectorBuffer(const void* data, unsigned size);
    //! Construct from a stream
    VectorBuffer(Deserializer& source, unsigned size);
    
    //! Read bytes from the buffer
    virtual void read(void* dest, unsigned size);
    //! Set position from the beginning of the buffer
    virtual unsigned seek(unsigned position);
    //! Write bytes to the buffer
    virtual void write(const void* data, unsigned size);
    
    //! Set data from another buffer
    void setData(const std::vector<unsigned char>& data);
    //! Set data from a memory area
    void setData(const void* data, unsigned size);
    //! Set data from a stream
    void setData(Deserializer& source, unsigned size);
    //! Reset to zero size
    void clear();
    //! Set size
    void resize(unsigned size);
    
    //! Return data
    const unsigned char* getData() const { return mSize ? &mBuffer[0] : 0; }
    //! Return non-const data
    unsigned char* getModifiableData() { return mSize ? &mBuffer[0] : 0; }
    //! Return the buffer
    const std::vector<unsigned char>& getBuffer() const { return mBuffer; }
    
private:
    //! Dynamic sized buffer
    std::vector<unsigned char> mBuffer;
};

#endif // COMMON_VECTORBUFFER_H