MyGUI_DataMemoryStream.cpp

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */
 
#include "MyGUI_Precompiled.h"
#include "MyGUI_DataMemoryStream.h"
 
namespace MyGUI
{
 
    DataMemoryStream::DataMemoryStream() :
        mData(nullptr),
        mSize(0),
        mStream(nullptr)
    {
    }
 
    DataMemoryStream::DataMemoryStream(unsigned char* _data, size_t _size) :
        mData(_data),
        mSize(_size),
        mStream(nullptr)
    {
    }
 
    DataMemoryStream::~DataMemoryStream()
    {
        delete mStream;
    }
 
    size_t DataMemoryStream::size()
    {
        return mSize;
    }
 
    bool DataMemoryStream::eof()
    {
        if (mStream == nullptr)
            prepareStream();
 
        return mStream->eof();
    }
 
    void DataMemoryStream::readline(std::string& _source, Char _delim)
    {
        if (mStream == nullptr)
            prepareStream();
 
        std::getline(*mStream, _source, (char)_delim);
    }
 
    size_t DataMemoryStream::read(void* _buf, size_t _count)
    {
        if (mData == nullptr)
            return 0;
 
        size_t count = (std::min)(size(), _count);
        ::memcpy(_buf, mData, count);
        return count;
    }
 
    void DataMemoryStream::prepareStream()
    {
        if (mData == nullptr)
            return;
 
        mStream = new std::stringstream((const char*)mData);
    }
 
} // namespace MyGUI