Function cmdline_parse_num

dpdk/lib/cmdline/cmdline_parse_num.c:95–312

parse an int */

/* parse an int */
int
cmdline_parse_num(cmdline_parse_token_hdr_t *tk, const char *srcbuf, void *res,
	unsigned ressize)
{
	struct cmdline_token_num_data nd;
	enum num_parse_state_t st = START;
	const char * buf;
	char c;
	uint64_t res1 = 0;

	if (!tk)
		return -1;

	if (!srcbuf || !*srcbuf)
		return -1;

	buf = srcbuf;
	c = *buf;

	memcpy(&nd, &((struct cmdline_token_num *)tk)->num_data, sizeof(nd));

	/* check that we have enough room in res */
	if (res) {
		if (check_res_size(&nd, ressize) < 0)
			return -1;
	}

	while (st != ERROR && c && !cmdline_isendoftoken(c)) {
		debug_printf("%c %x -> ", c, c);
		switch (st) {
		case START:
			if (c == '-') {
				st = DEC_NEG;
			}
			else if (c == '0') {
				st = ZERO_OK;
			}
			else if (c >= '1' && c <= '9') {
				if (add_to_res(c - '0', &res1, 10) < 0)
					st = ERROR;
				else
					st = DEC_POS_OK;
			}
			else  {
				st = ERROR;
			}
			break;

		case ZERO_OK:
			if (c == 'x') {
				st = HEX;
			}
			else if (c == 'b') {
				st = BIN;
			}
			else if (c >= '0' && c <= '7') {
				if (add_to_res(c - '0', &res1, 10) < 0)
					st = ERROR;