ft_strnstr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strnstr.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tpouget <cassepipe@ymail.com>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/05/14 17:04:38 by tpouget           #+#    #+#             */
/*   Updated: 2020/05/14 17:06:13 by tpouget          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strnstr(const char *big, const char *little, size_t len)
{
	size_t	i;
	size_t	y;

	i = 0;
	y = 0;
	if (!*little)
		return (char *)big;
	while (i < len && big[i])
	{
		if (big[i] == little[y])
		{
			while (i + y < len && big[i + y] == little[y])
			{
				if (!little[y + 1])
					return ((char*)big + i);
				y++;
			}
			y = 0;
		}
		i++;
	}
	return (NULL);
}