parse_hex_address.c

static int parse_hex_address(const char *addr_str, int8_t *addr_bin, int maxlen)
{
        int i;
        int len = strlen(addr_str) / 2;
        char hexstr[3];

        for (i = 0; i < len && i < maxlen; i++) {
                sscanf(&addr_str[i*2], "%2s", hexstr);
                sscanf(hexstr, "%hhx", &addr_bin[i]);
        }

        return i;
}