From db78a3bd5620aa575e2944fe4d5fc132e767a7c6 Mon Sep 17 00:00:00 2001
From: Alessandro Iezzi <aiezzi@alessandroiezzi.it>
Date: Wed, 30 Nov 2022 22:01:24 +0100
Subject: Move list.c

---
 list.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 list.c

(limited to 'list.c')

diff --git a/list.c b/list.c
new file mode 100644
index 0000000..f73348c
--- /dev/null
+++ b/list.c
@@ -0,0 +1,85 @@
+#include <stdlib.h>
+#include <string.h> /* memcpy */
+#include "list.h"
+
+list_t clist_create()
+{
+  list_t list;
+
+  list.first = NULL;
+  list.last  = NULL;
+  list.size  = 0;
+
+  return list;
+}
+
+void clist_add(list_t *list,
+               void   *data,
+               int     size_of)
+{
+  struct list_item_t *item = malloc(sizeof(struct list_item_t));
+
+  void *dest = malloc(size_of); /* allocates memory like data parameter */
+  memcpy(dest, data, size_of);  /* copies data inside dest              */
+  item->data = dest;
+  item->next = NULL;
+
+  if (list->first == NULL)
+    list->first = item;
+
+  if (list->last != NULL)
+    list->last->next = item;
+
+  list->last = item;
+  list->size ++;
+}
+
+void clist_add_all(list_t *dest,
+                   list_t *other)
+{
+  dest->last->next = other->first;
+  dest->size += other->size;
+}
+
+void clist_remove(list_t *list,
+                  list_item_t *item)
+{
+  list_item_t *curr = list->first->next;
+  list_item_t *prev = list->first;
+
+  if (list->first == item) {
+    free(list->first);
+    list->first = curr;
+  } else {
+    while (curr != NULL) {
+      if (curr == item) {
+	prev->next = curr->next;
+	free(curr);
+	return;
+      }
+      prev = curr;
+      curr = curr->next;
+    }
+  }
+}
+
+iterator_t clist_iterator(list_t *list)
+{
+  struct iterator_t *iterator = malloc(sizeof(struct iterator_t));
+  iterator->current = list->first;
+
+  return *iterator;
+}
+
+int iterator_has_next(iterator_t *iterator)
+{
+  return iterator->current != NULL;
+}
+
+list_item_t *iterator_next(iterator_t *iterator)
+{
+  struct list_item_t *current = iterator->current;
+  iterator->current = iterator->current->next;
+
+  return current;
+}
-- 
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