libft/ft_strtrim.c at main · andrelucca99/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: alucas-e <alucas-e@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/22 14:38:25 by alucas-e          #+#    #+#             */
/*   Updated: 2024/10/22 15:20:12 by alucas-e         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strtrim(char const *s1, char const *set)
{
	size_t	start;
	size_t	end;
	size_t	len;

	if (!s1 || !set)
		return (0);
	start = 0;
	while (s1[start] && ft_strchr(set, s1[start]))
		start++;
	end = ft_strlen(s1) - 1;
	while (end && ft_strchr(set, s1[end]))
		end--;
	if (end < start)
		return (ft_substr(s1, 0, 0));
	len = end - start + 1;
	return (ft_substr(s1, start, len));
}