hex2bin

typedef BYTE unsigned char;

</pre><pre code_snippet_id="1639451" snippet_file_name="blog_20160408_3_9633505" name="code" class="cpp">BYTE  HexChar[256]={0};

void  InitHexBuff()

{

    HexChar[0] = '0';

    HexChar[1] = '1';

    HexChar[2] = '2';

    HexChar[3] = '3';

    HexChar[4] = '4';

    HexChar[5] = '5';

    HexChar[6] = '6';

    HexChar[7] = '7';

    HexChar[8] = '8';

    HexChar[9] = '9';

    HexChar[0xA] ='A';

    HexChar[0xB] = 'B';

    HexChar[0xC] = 'C';

    HexChar[0xD] = 'D';

    HexChar[0xE] = 'E';

    HexChar[0xF] = 'F';

    HexChar['0'] = 0;

    HexChar['1'] = 1;

    HexChar['2'] = 2;

    HexChar['3'] = 3;

    HexChar['4'] = 4;

    HexChar['5'] = 5;

    HexChar['6'] = 6;

    HexChar['7'] = 7;

    HexChar['8'] = 8;

    HexChar['9'] = 9;

    HexChar['A'] = 0xA;

    HexChar['B'] = 0xB;

    HexChar['C'] = 0xC;

    HexChar['D'] = 0xD;

    HexChar['E'] = 0xE;

    HexChar['F'] = 0xF;

}

void  Hex2Bin(char* hex,int len,BYTE* Outbuff)

{

    for (int i = 0;i<len;i+=2)

    {

        BYTE a = hex[i];

        BYTE b = hex[i+1];

        Outbuff[i/2] = (HexChar[a] << 4)+HexChar[b];

    }

}

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hex2bin

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