1  /* ************************************************************************** */
 2  /*                                                                            */
 3  /*                                                        :::      ::::::::   */
 4  /*   ft_strtrim.c                                       :+:      :+:    :+:   */
 5  /*                                                    +:+ +:+         +:+     */
 6  /*   By: abonnard <abonnard@student.42nice.fr>      +#+  +:+       +#+        */
 7  /*                                                +#+#+#+#+#+   +#+           */
 8  /*   Created: 2024/11/05 13:31:24 by abonnard          #+#    #+#             */
 9  /*   Updated: 2024/11/05 17:38:50 by abonnard         ###   ########.fr       */
10  /*                                                                            */
11  /* ************************************************************************** */
12  
13  #include <stdlib.h>
14  #include "../include/libft.h"
15  
16  static int	ft_is_in_set(char c, const char *set)
17  {
18  	int	j;
19  
20  	j = 0;
21  	while (set[j])
22  	{
23  		if (c == set[j])
24  			return (1);
25  		j++;
26  	}
27  	return (0);
28  }
29  
30  static int	ft_trim_start(const char *s1, const char *set)
31  {
32  	int	i;
33  
34  	i = 0;
35  	while (s1[i] && ft_is_in_set(s1[i], set))
36  		i++;
37  	return (i);
38  }
39  
40  static int	ft_trim_end(const char *s1, const char *set)
41  {
42  	int	len;
43  
44  	len = 0;
45  	while (s1[len])
46  		len++;
47  	len--;
48  	while (len >= 0 && ft_is_in_set(s1[len], set))
49  		len--;
50  	return (len + 1);
51  }
52  
53  char	*ft_strtrim(char const *s1, char const *set)
54  {
55  	char	*str;
56  	int		start;
57  	int		end;
58  	int		i;
59  
60  	if (!s1 || !set)
61  		return (NULL);
62  	start = ft_trim_start(s1, set);
63  	end = ft_trim_end(s1, set);
64  	if (start >= end)
65  		 str = malloc(sizeof(char));
66          if (!str)
67              return (NULL);
68          str[0] = '\0';
69          return (str);
70  	str = malloc(sizeof(char) * (end - start + 1));
71  	if (!str)
72  		return (NULL);
73  	i = 0;
74  	while (start < end)
75  		str[i++] = s1[start++];
76  	str[i] = '\0';
77  	return (str);
78  }