GBK与Unicode的转换

一、GBK转换到Unicode编码

std::string Gbk2Unicode(std::string &strValue)
{
    std::string strReturn;
    unsigned char chTemp;
    int nLength = strValue.length()*+;
    WCHAR *pwchBuf = new WCHAR[nLength];
    memset(pwchBuf, , sizeof(WCHAR) * nLength);

    MultiByteToWideChar(CP_ACP, , strValue.c_str(), -, (LPWSTR)pwchBuf, nLength);

    for (size_t i = ; i < wcslen(pwchBuf); i++)
    {
        strReturn += "\\u";
        chTemp = *((unsigned char*)pwchBuf+i*+);
        if(chTemp)
        {
            strReturn += m_clsmyOpenssl.char_to_hex( (unsigned char)(chTemp >> ) );
            strReturn += m_clsmyOpenssl.char_to_hex( (unsigned char)(chTemp % ) );
        }
        chTemp = *((unsigned char*)pwchBuf+i*);
        strReturn += m_clsmyOpenssl.char_to_hex( (unsigned char)(chTemp >> ) );
        strReturn += m_clsmyOpenssl.char_to_hex( (unsigned char)(chTemp % ) );
    }
    delete[]pwchBuf;
    pwchBuf = NULL;
    return strReturn;
}

二、Unicode转换到GBK编码

std::string Unicode2GBK(std::string &strValue)
{
    std::vector<std::string> vcString;
    MyTools::SplitString(strValue, "\\u", vcString);

    wchar_t* pwBuf = new wchar_t[strValue.length() + ];
    memset(pwBuf, , (strValue.length() + )* sizeof(wchar_t));

    int j();

    for(std::vector<std::string>::iterator it = vcString.begin(); it != vcString.end(); ++it)
    {
        if (it->empty())
        {
            continue;
        }
        unsigned short wcTmp = ;
        unsigned char cTmp = ;

        //因为有中文字符混合ASSCII码情况,所以条件为k < it->length()
        for(size_t k = ; k < it->length(); ++k)
        {
            cTmp = (unsigned char)(*it)[k];

            if(cTmp <= '')//0x30~0x39 即0~9
            {
                wcTmp |= (cTmp & 0x0f) << (it->length() - k - ) * ;
            }
            else if(cTmp >= 'a')//0x61~7a 即a~z
            {
                wcTmp |= (cTmp - 0x57) << (it->length() - k - ) * ;
            }
            else//0x41~5a 即A~Z
            {
                wcTmp |= (cTmp - 0x37) << (it->length() - k - ) * ;
            }
        }
        pwBuf[j++] = (wchar_t)wcTmp;
    }
    char *pDst = new char[strValue.length() + ];
    memset(pDst, , (strValue.length() + ) * sizeof(char));

    WideCharToMultiByte(CP_ACP, , pwBuf, -, (char*)pDst, strValue.length() - , NULL, NULL);
    std::string strRet(pDst);

    delete[]pwBuf;
    pwBuf= NULL;

    delete[]pDst;
    pDst=NULL;

    return strRet;
}