From 7a34b3d412f5022d4ce25d84ec7fb4002b1fb5db Mon Sep 17 00:00:00 2001
From: Thomas Vanbesien <tvanbesi@proton.me>
Date: Sat, 21 Feb 2026 17:33:28 +0100
Subject: Implement libft Part 3 (linked lists) with tests

Add t_list struct and 9 linked list functions: ft_lstnew,
ft_lstadd_front, ft_lstsize, ft_lstlast, ft_lstadd_back,
ft_lstdelone, ft_lstclear, ft_lstiter, ft_lstmap.
---
 src/ft_lstadd_back.c  | 15 +++++++++++++++
 src/ft_lstadd_front.c |  8 ++++++++
 src/ft_lstclear.c     | 19 +++++++++++++++++++
 src/ft_lstdelone.c    |  9 +++++++++
 src/ft_lstiter.c      | 11 +++++++++++
 src/ft_lstlast.c      | 11 +++++++++++
 src/ft_lstmap.c       | 26 ++++++++++++++++++++++++++
 src/ft_lstnew.c       | 15 +++++++++++++++
 src/ft_lstsize.c      | 15 +++++++++++++++
 src/ft_split.c        |  1 +
 10 files changed, 130 insertions(+)
 create mode 100644 src/ft_lstadd_back.c
 create mode 100644 src/ft_lstadd_front.c
 create mode 100644 src/ft_lstclear.c
 create mode 100644 src/ft_lstdelone.c
 create mode 100644 src/ft_lstiter.c
 create mode 100644 src/ft_lstlast.c
 create mode 100644 src/ft_lstmap.c
 create mode 100644 src/ft_lstnew.c
 create mode 100644 src/ft_lstsize.c

(limited to 'src')

diff --git a/src/ft_lstadd_back.c b/src/ft_lstadd_back.c
new file mode 100644
index 0000000..076cae9
--- /dev/null
+++ b/src/ft_lstadd_back.c
@@ -0,0 +1,15 @@
+#include "libft.h"
+
+void
+ft_lstadd_back (t_list **lst, t_list *new)
+{
+  t_list *last;
+
+  if (!*lst)
+    {
+      *lst = new;
+      return;
+    }
+  last = ft_lstlast (*lst);
+  last->next = new;
+}
diff --git a/src/ft_lstadd_front.c b/src/ft_lstadd_front.c
new file mode 100644
index 0000000..e689412
--- /dev/null
+++ b/src/ft_lstadd_front.c
@@ -0,0 +1,8 @@
+#include "libft.h"
+
+void
+ft_lstadd_front (t_list **lst, t_list *new)
+{
+  new->next = *lst;
+  *lst = new;
+}
diff --git a/src/ft_lstclear.c b/src/ft_lstclear.c
new file mode 100644
index 0000000..4c738b7
--- /dev/null
+++ b/src/ft_lstclear.c
@@ -0,0 +1,19 @@
+#include "libft.h"
+#include <stdlib.h>
+
+void
+ft_lstclear (t_list **lst, void (*del) (void *))
+{
+  t_list *cur;
+  t_list *next;
+
+  cur = *lst;
+  while (cur)
+    {
+      next = cur->next;
+      del (cur->content);
+      free (cur);
+      cur = next;
+    }
+  *lst = NULL;
+}
diff --git a/src/ft_lstdelone.c b/src/ft_lstdelone.c
new file mode 100644
index 0000000..1fe570f
--- /dev/null
+++ b/src/ft_lstdelone.c
@@ -0,0 +1,9 @@
+#include "libft.h"
+#include <stdlib.h>
+
+void
+ft_lstdelone (t_list *lst, void (*del) (void *))
+{
+  del (lst->content);
+  free (lst);
+}
diff --git a/src/ft_lstiter.c b/src/ft_lstiter.c
new file mode 100644
index 0000000..84fc000
--- /dev/null
+++ b/src/ft_lstiter.c
@@ -0,0 +1,11 @@
+#include "libft.h"
+
+void
+ft_lstiter (t_list *lst, void (*f) (void *))
+{
+  while (lst)
+    {
+      f (lst->content);
+      lst = lst->next;
+    }
+}
diff --git a/src/ft_lstlast.c b/src/ft_lstlast.c
new file mode 100644
index 0000000..68b6337
--- /dev/null
+++ b/src/ft_lstlast.c
@@ -0,0 +1,11 @@
+#include "libft.h"
+
+t_list *
+ft_lstlast (t_list *lst)
+{
+  if (!lst)
+    return (NULL);
+  while (lst->next)
+    lst = lst->next;
+  return (lst);
+}
diff --git a/src/ft_lstmap.c b/src/ft_lstmap.c
new file mode 100644
index 0000000..c001a2d
--- /dev/null
+++ b/src/ft_lstmap.c
@@ -0,0 +1,26 @@
+#include "libft.h"
+#include <stdlib.h>
+
+t_list *
+ft_lstmap (t_list *lst, void *(*f) (void *), void (*del) (void *))
+{
+  t_list *new_list;
+  t_list *node;
+  void *content;
+
+  new_list = NULL;
+  while (lst)
+    {
+      content = f (lst->content);
+      node = ft_lstnew (content);
+      if (!node)
+        {
+          del (content);
+          ft_lstclear (&new_list, del);
+          return (NULL);
+        }
+      ft_lstadd_back (&new_list, node);
+      lst = lst->next;
+    }
+  return (new_list);
+}
diff --git a/src/ft_lstnew.c b/src/ft_lstnew.c
new file mode 100644
index 0000000..37412b4
--- /dev/null
+++ b/src/ft_lstnew.c
@@ -0,0 +1,15 @@
+#include "libft.h"
+#include <stdlib.h>
+
+t_list *
+ft_lstnew (void *content)
+{
+  t_list *node;
+
+  node = malloc (sizeof (t_list));
+  if (!node)
+    return (NULL);
+  node->content = content;
+  node->next = NULL;
+  return (node);
+}
diff --git a/src/ft_lstsize.c b/src/ft_lstsize.c
new file mode 100644
index 0000000..2986498
--- /dev/null
+++ b/src/ft_lstsize.c
@@ -0,0 +1,15 @@
+#include "libft.h"
+
+int
+ft_lstsize (t_list *lst)
+{
+  int count;
+
+  count = 0;
+  while (lst)
+    {
+      count++;
+      lst = lst->next;
+    }
+  return (count);
+}
diff --git a/src/ft_split.c b/src/ft_split.c
index bb51c85..966ce5f 100644
--- a/src/ft_split.c
+++ b/src/ft_split.c
@@ -21,6 +21,7 @@ _s_count_words (char const *s, char c)
   return (count);
 }
 
+/** Free the first @p n elements of @p arr, then @p arr itself. */
 static void
 _s_free_all (char **arr, size_t n)
 {
-- 
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