ft_strnstr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strnstr.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: msaliuta <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2018/10/27 20:02:38 by msaliuta          #+#    #+#             */
/*   Updated: 2018/11/04 16:20:27 by msaliuta         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strnstr(const char *haystack, const char *needle, size_t len)
{
	size_t	i;
	size_t	j;

	if (!*needle)
		return ((char*)haystack);
	i = -1;
	while (haystack[++i])
	{
		j = 0;
		while (needle[j] == haystack[i + j])
		{
			if (needle[j + 1] == '\0' && (i + j) < len)
				return ((char*)(haystack + i));
			j++;
		}
	}
	return (NULL);
}