Function rte_lpm_is_rule_present

dpdk/lib/lpm/rte_lpm.c:849–875

* Look for a rule in the high-level rules table */

 * Look for a rule in the high-level rules table
 */
int
rte_lpm_is_rule_present(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
uint32_t *next_hop)
{
	struct __rte_lpm *i_lpm;
	uint32_t ip_masked;
	int32_t rule_index;

	/* Check user arguments. */
	if ((lpm == NULL) ||
		(next_hop == NULL) ||
		(depth < 1) || (depth > RTE_LPM_MAX_DEPTH))
		return -EINVAL;

	/* Look for the rule using rule_find. */
	i_lpm = container_of(lpm, struct __rte_lpm, lpm);
	ip_masked = ip & depth_to_mask(depth);
	rule_index = rule_find(i_lpm, ip_masked, depth);

	if (rule_index >= 0) {
		*next_hop = i_lpm->rules_tbl[rule_index].next_hop;
		return 1;
	}

	/* If rule is not found return 0. */
	return 0;
}

static int32_t
find_previous_rule(struct __rte_lpm *i_lpm, uint32_t ip, uint8_t depth,