base struct

lib/libft/srcs/str/ft_strtrim.c

@@ -0,0 +1,77 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strtrim.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: nalebrun <nalebrun@student.s19.be>         +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/14 17:42:56 by nalebrun          #+#    #+#             */
+/*   Updated: 2024/11/25 16:16:44 by nalebrun         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../../libft.h"
+
+static int	ft_instr(int c, char *str)
+{
+	int	i;
+
+	i = -1;
+	while (str[++i])
+		if (str[i] == c)
+			return (1);
+	return (0);
+}
+
+static int	ft_gettrimstart(const char *str, const char *set)
+{
+	int	i;
+
+	i = 0;
+	while (ft_instr(str[i], (char *)set) && str[i])
+		i++;
+	return (i);
+}
+
+static int	ft_gettrimend(const char *str, const char *set)
+{
+	int	i;
+
+	i = 0;
+	while (ft_instr(str[ft_strlen(str) - i - 1], (char *)set))
+		i++;
+	return (i);
+}
+
+static void	trloop(char *cpy, const char *s1, size_t trimstart, size_t trimend)
+{
+	size_t	i;
+
+	i = 0;
+	while (i < ft_strlen(s1) - (trimstart + trimend))
+	{
+		cpy[i] = s1[trimstart + i];
+		i++;
+	}
+	cpy[i] = 0;
+}
+
+char	*ft_strtrim(const char *s1, const char *set)
+{
+	char	*cpy;
+	size_t	trimstart;
+	size_t	trimend;
+
+	if (!s1 || !set)
+		return (NULL);
+	cpy = (char *)s1;
+	trimstart = ft_gettrimstart(s1, set);
+	if (trimstart == ft_strlen(s1))
+		return (ft_strdup(""));
+	trimend = ft_gettrimend(s1, set);
+	cpy = ft_calloc(ft_strlen(s1) - (trimstart + trimend) + 1, sizeof(char));
+	if (!cpy)
+		return (NULL);
+	trloop(cpy, s1, trimstart, trimend);
+	return (cpy);
+}