//__二进制转十六进制

std::string BinToHex(const std::string &strBin, bool bIsUpper/* = false*/)

{

 std::string strHex;

 strHex.resize(strBin.size() * );

 for (size_t i = ; i < strBin.size(); i++)

 {

     uint8_t cTemp = strBin[i];

     for (size_t j = ; j < ; j++)

     {

         uint8_t cCur = (cTemp & 0x0f);

         if (cCur < )

         {

             cCur += '';

         }

         else

         {

             cCur += ((bIsUpper ? 'A' : 'a') - );

         }

         strHex[ * i +  - j] = cCur;

         cTemp >>= ;

     }

 }

 return strHex;

}

//十六进制转二进制

std::string HexToBin(const std::string &strHex)

{

    if (strHex.size() %  != )

    {

        return "";

    }

    std::string strBin;

    strBin.resize(strHex.size() / );

    for (size_t i = ; i < strBin.size(); i++)

    {

        uint8_t cTemp = ;

        for (size_t j = ; j < ; j++)

        {

            char cCur = strHex[ * i + j];

            if (cCur >= '' && cCur <= '')

            {

                cTemp = (cTemp << ) + (cCur - '');

            }

            else if (cCur >= 'a' && cCur <= 'f')

            {

                cTemp = (cTemp << ) + (cCur - 'a' + );

            }

            else if (cCur >= 'A' && cCur <= 'F')

            {

                cTemp = (cTemp << ) + (cCur - 'A' + );

            }

            else

            {

                return "";

            }

        }

        strBin[i] = cTemp;

    }

    return strBin;

}