fix: Fix memory leaks if ft_lst* function args are NULL

Author: itislu

libraries/libft/src/lists/singly_linked/ft_lstadd_back_tail.c

@@ -6,7 +6,7 @@
 /*   By: ldulling <ldulling@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/02/11 00:35:15 by ldulling          #+#    #+#             */
-/*   Updated: 2025/05/28 19:29:42 by ldulling         ###   ########.fr       */
+/*   Updated: 2025/05/28 21:34:35 by ldulling         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,15 +20,22 @@
  *
  * @param lst     The address of the pointer to the first node of the list.
  * @param tail    The address of the pointer to the last node of the list.
+ *                If tail (not *tail) is NULL, it is ignored.
  * @param new     The new node to be added to the list.
+ *                If new is NULL, the function does nothing.
  *
  * @return        No return value.
  *
  */
 void	ft_lstadd_back_tail(t_list **lst, t_list **tail, t_list *new)
 {
-	if (*lst == NULL)
-		*lst = new;
+	if (lst == NULL || tail == NULL || new == NULL)
+	{
+		ft_lstadd_back(lst, new);
+		return ;
+	}
+	if (*lst == NULL || *tail == NULL)
+		ft_lstadd_back(lst, new);
 	else
 		(*tail)->next = new;
 	*tail = new;

libraries/libft/src/lists/singly_linked/ft_lstnew_back.c

@@ -6,7 +6,7 @@
 /*   By: ldulling <ldulling@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/01/06 20:30:19 by ldulling          #+#    #+#             */
-/*   Updated: 2024/01/17 11:42:57 by ldulling         ###   ########.fr       */
+/*   Updated: 2025/05/28 20:14:28 by ldulling         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,13 +20,15 @@
  * @param content    The content to be added to the new node.
  *
  * @return           Returns true if the new node was successfully added, false
- *                   if malloc failed.
+ *                   if malloc failed or lst (not *lst) is NULL.
  *
  */
 bool	ft_lstnew_back(t_list **lst, void *content)
 {
 	t_list	*new_node;
 
+	if (lst == NULL)
+		return (false);
 	new_node = ft_lstnew(content);
 	if (new_node == NULL)
 		return (false);

libraries/libft/src/lists/singly_linked/ft_lstnew_back_tail.c

@@ -6,7 +6,7 @@
 /*   By: ldulling <ldulling@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/07 19:11:17 by ldulling          #+#    #+#             */
-/*   Updated: 2025/05/28 19:26:46 by ldulling         ###   ########.fr       */
+/*   Updated: 2025/05/28 20:24:43 by ldulling         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,16 +20,19 @@
  *
  * @param lst        The address of the list to add the new node to.
  * @param tail       The address of the pointer to the last node of the list.
+ *                   If tail (not *tail) is NULL, it is ignored.
  * @param content    The content to be added to the new node.
  *
  * @return           Returns true if the new node was successfully added, false
- *                   if malloc failed.
+ *                   if malloc failed or lst (not *lst) is NULL.
  *
  */
 bool	ft_lstnew_back_tail(t_list **lst, t_list **tail, void *content)
 {
 	t_list	*new_node;
 
+	if (lst == NULL || tail == NULL)
+		return (ft_lstnew_back(lst, content));
 	new_node = ft_lstnew(content);
 	if (new_node == NULL)
 		return (false);

libraries/libft/src/lists/singly_linked/ft_lstnew_front.c

@@ -6,7 +6,7 @@
 /*   By: ldulling <ldulling@student.42.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/01/25 16:09:14 by ldulling          #+#    #+#             */
-/*   Updated: 2024/01/25 16:09:17 by ldulling         ###   ########.fr       */
+/*   Updated: 2025/05/28 20:14:18 by ldulling         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,13 +20,15 @@
  * @param content The content to be added to the new node.
  *
  * @return        Returns true if the new node was successfully added, false if
- *                malloc failed.
+ *                malloc failed or lst (not *lst) is NULL.
  *
  */
 bool	ft_lstnew_front(t_list **lst, void *content)
 {
 	t_list	*new_node;
 
+	if (lst == NULL)
+		return (false);
 	new_node = ft_lstnew(content);
 	if (new_node == NULL)
 		return (false);