/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018 Gaëtan Rivet
 */

#include "rte_ethdev.h"
#include "ethdev_private.h"

struct rte_eth_dev *
eth_find_device(const struct rte_eth_dev *start, rte_eth_cmp_t cmp,
		const void *data)
{
	struct rte_eth_dev *edev;
	ptrdiff_t idx;

	/* Avoid Undefined Behaviour */
	if (start != NULL &&
	    (start < &rte_eth_devices[0] ||
	     start > &rte_eth_devices[RTE_MAX_ETHPORTS]))
		return NULL;
	if (start != NULL)
		idx = start - &rte_eth_devices[0] + 1;
	else
		idx = 0;
	for (; idx < RTE_MAX_ETHPORTS; idx++) {
		edev = &rte_eth_devices[idx];
		if (cmp(edev, data) == 0)
			return edev;
	}
	return NULL;
}