ft_strtrim.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: gpuscedd <gpuscedd@student.42roma.it>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/01/18 18:32:48 by gpuscedd          #+#    #+#             */
/*   Updated: 2024/01/19 21:40:39 by gpuscedd         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!s1)
		return (NULL);
	if (!*s1)
		return (ft_strdup(""));
	start = 0;
	end = ft_strlen(s1) - 1;
	while (start <= end && ft_strchr(set, s1[start]))
		start++;
	while (end >= start && ft_strchr(set, s1[end]))
		end--;
	new_len = end - start + 2;
	trimmed = malloc((new_len) * sizeof(char));
	if (!trimmed)
		return (NULL);
	ft_strlcpy(trimmed, s1 + start, new_len);
	return (trimmed);
}