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  • C++ 字节流 CByteBuffer

    
    
    CByteBuffer使用
    static void Main()
    {
        BYTE a;
        short b;
        int c;
        CByteBuffer buffer;
        buffer<<a<<b<<c;
    }
     

    class
    CByteBuffer { public: BYTE* m_lpBuf; int nCurrentIndex; int nCapacity; int nLen; CByteBuffer() { Init(128); } CByteBuffer(int nCapacityIn) { Init(nCapacityIn); } ~CByteBuffer() { delete [] m_lpBuf; m_lpBuf=NULL; } void GetMoreCapacity() { BYTE *pBytesMore=new BYTE[nCapacity*2]; //两倍 memcpy(pBytesMore,m_lpBuf,nCapacity*sizeof(BYTE)); memset(pBytesMore+nCapacity,0x00,nCapacity*sizeof(BYTE)); delete [] m_lpBuf; m_lpBuf=pBytesMore; nCapacity*=2; } template<typename T> CByteBuffer& operator <<(T dw) { int nSizeNew=nCurrentIndex + sizeof(T); while(nSizeNew>nCapacity) { GetMoreCapacity(); //缓冲区空间不够 } *(T*)(&m_lpBuf[nCurrentIndex])=dw; //添入缓冲区 nCurrentIndex += sizeof(T); //移动当前索引 nLen+=sizeof(T); return *this; } private: void Init(int nCapatityIn) { nCapacity=nCapatityIn; m_lpBuf=new BYTE[nCapatityIn]; memset(m_lpBuf,0x00,nCapacity); nCurrentIndex=0; nLen=0; } };
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  • 原文地址:https://www.cnblogs.com/JsonBlog/p/4153431.html
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