correction memcpy pour le cas ou dst et src sont nuls

srcd/part1/ft_strdup.c

@@ -0,0 +1,32 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strdup.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/25 13:56:54 by hulamy            #+#    #+#             */
+/*   Updated: 2019/11/25 13:56:55 by hulamy           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+/*
+** save a copy of string src by allocating memory and return pointer to copy
+*/
+
+#include "libft.h"
+
+char	*ft_strdup(const char *src)
+{
+	int		i;
+	char	*str;
+
+	i = 0;
+	while (src[i] != '\0')
+		i++;
+	if (!(str = (char*)malloc(sizeof(*str) * (i + 1))))
+		return (NULL);
+	while (i-- >= 0)
+		str[i + 1] = src[i + 1];
+	return (str);
+}