ft_strtrim.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tairribe <tairribe@student.42sp.org.br>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/06/10 18:57:33 by tairribe          #+#    #+#             */
/*   Updated: 2022/06/10 23:38:57 by tairribe         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

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