modules/openthread/openthread_utils.c

/*
 * Copyright (c) 2025 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 *   This file provides utility functions for the OpenThread module.
 *
 */

#include <stddef.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>

#include <openthread_utils.h>

int bytes_from_str(uint8_t *buf, int buf_len, const char *src)
{
	if (!buf || !src) {
		return -EINVAL;
	}

	size_t i;
	size_t src_len = strlen(src);
	char *endptr;

	for (i = 0U; i < src_len; i++) {
		if (!isxdigit((unsigned char)src[i]) && src[i] != ':') {
			return -EINVAL;
		}
	}

	(void)memset(buf, 0, buf_len);

	for (i = 0U; i < (size_t)buf_len; i++) {
		buf[i] = (uint8_t)strtol(src, &endptr, 16);
		src = ++endptr;
	}

	return 0;
}