input validation

libft/ft_strdup.c

@@ -0,0 +1,31 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strdup.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dgaillet <dgaillet@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/11/05 19:31:29 by dgaillet          #+#    #+#             */
+/*   Updated: 2025/11/12 13:54:36 by dgaillet         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+char	*ft_strdup(const char *s)
+{
+	char	*dest;
+	int		i;
+
+	dest = malloc(sizeof(char) *(ft_strlen(s) + 1));
+	if (!dest)
+		return (NULL);
+	i = 0;
+	while (s[i])
+	{
+		dest[i] = s[i];
+		i++;
+	}
+	dest[i] = '\0';
+	return (dest);
+}