using linked lists instead of arrays

[libradsec.git] / list.h

diff --git a/list.h b/list.h
new file mode 100644 (file)
index 0000000..876d345
--- /dev/null
+++ b/list.h
@@ -0,0 +1,23 @@
+struct list_node {
+    struct list_node *next;
+    void *data;
+};
+
+struct list {
+    struct list_node *first, *last;
+};
+
+/* allocates and initialises list structure; returns NULL if malloc fails */
+struct list *list_create();
+
+/* frees all memory associated with the list */
+void list_destroy(struct list *list);
+
+/* appends entry to list; returns 1 if ok, 0 if malloc fails */
+int list_add(struct list *list, void *data);
+
+/* returns first node */
+struct list_node *list_first(struct list *list);
+
+/* returns the next node after the argument */
+struct list_node *list_next(struct list_node *node);