add list for zonefile parsing (untested)

2 files changed, 75 insertions, 0 deletions

diff --git a/src/list.c b/src/list.c
new file mode 100644
index 0000000..6a0085f
--- /dev/null
+++ b/src/list.c
@@ -0,0 +1,50 @@
+/*
+ * src/list.c
+ * (c) 2021 Jonas Gunz <himself@jonasgunz.de>
+ * License: MIT
+ */
+
+#include "list.h"
+
+int list_add( list_element_t** _root, void* _data ) {
+	list_element_t** iter = _root;
+	list_element_t* new_element = malloc( sizeof(list_element_t) );
+
+	new_element->data = _data;
+	new_element->next = NULL;
+
+	if( !new_element )
+		return 1;
+
+	while(*iter)
+		iter = & (*iter)->next;
+
+	*iter = new_element;
+
+	return 0;
+}
+
+int list_sort ( list_element_t** _root ) {
+	return -1;
+}
+
+int list_length ( list_element_t* _root ) {
+	return -1;
+}
+
+void* list_pop_front ( list_element_t** _root ) {
+	list_element_t* old = NULL;
+	void* old_data = NULL;
+
+	if( !*_root )
+		return NULL;
+
+	old = *_root;
+	old_data = old->data;
+
+	*_root = (*_root)->next;
+
+	free ( old );
+
+	return old_data;
+}
diff --git a/src/list.h b/src/list.h
new file mode 100644
index 0000000..71594ad
--- /dev/null
+++ b/src/list.h
@@ -0,0 +1,25 @@
+/*
+ * src/list.h
+ * (c) 2021 Jonas Gunz <himself@jonasgunz.de>
+ * License: MIT
+ */
+
+#pragma once
+
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct list_element list_element_t;
+
+struct list_element {
+	void* data;
+	list_element_t* next;
+};
+
+int list_add( list_element_t** _root, void* _data );
+
+int list_sort ( list_element_t** _root );
+
+int list_length ( list_element_t* _root );
+
+void* list_pop_front ( list_element_t** _root );