hex2bin

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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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