stock hexstr(string[])
{
        new ret, val, i;
        if(string[0] == '0' && (string[1] == 'x' || string[1] == 'X')) i = 2;
        while(string[i])
        {
                ret <<= 4;
                val = string[i++] - '0';
                if(val > 0x09) val -= 0x07;
                if(val > 0x0F) val -= 0x20;
                if(val < 0x01) continue;
                if(val < 0x10) ret += val;
        }
        return ret;
}