libft/ft_strnstr.c at master · sconstab/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strnstr.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sconstab <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/05/27 14:12:51 by sconstab          #+#    #+#             */
/*   Updated: 2019/06/08 10:56:45 by sconstab         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strnstr(const char *h, const char *n, size_t len)
{
	size_t	i;
	size_t	j;

	i = 0;
	if (n[0] == '\0')
		return ((char *)h);
	while (h[i] && i < len)
	{
		j = 0;
		while (h[i + j] == n[j])
		{
			if (i + j >= len)
				break ;
			if (n[j + 1] == '\0')
				return ((char *)&h[i]);
			j++;
		}
		i++;
	}
	return (NULL);
}