/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strtrim.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/15 12:44:26 by thrieg            #+#    #+#             */
/*   Updated: 2025/02/16 19:05:20 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static size_t	ft_str_size(char const *s1, char usedchar[256])
{
	size_t	size;
	size_t	index;

	size = 0;
	index = 0;
	while (*s1)
	{
		while (usedchar[((int)*s1) + 128])
		{
			s1++;
			index++;
		}
		if (*s1)
		{
			s1++;
			index++;
			size = index;
		}
	}
	return (size);
}

//returns NULL if any argument is null or if an allocation fails
char	*ft_strtrim(char const *s1, char const *set)
{
	char	*ret;
	char	usedchar[256];
	int		start_index;
	size_t	size;

	if (!set || !s1)
		return (NULL);
	if (!*set)
		return (ft_strdup(s1));
	ft_bzero(usedchar, 256);
	while (*set)
		usedchar[((int)*set++) + 128] = 1;
	start_index = 0;
	while (usedchar[((int)s1[start_index]) + 128])
		start_index++;
	if (!s1[start_index])
		return (ft_strdup(""));
	size = ft_str_size(&s1[start_index], usedchar);
	ret = malloc(sizeof(char) * (size + 1));
	if (!ret)
		return (NULL);
	ft_strlcpy(ret, &s1[start_index], (size + 1));
	return (ret);
}