From 13293d178731bba7d77123e57bc08925d285d522 Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Tue, 21 Sep 2021 21:57:26 +0200
Subject: list: add length and tests

---
 src/list.c | 15 +++++++++++++--
 src/list.h |  2 +-
 2 files changed, 14 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/list.c b/src/list.c
index 133637b..226985e 100644
--- a/src/list.c
+++ b/src/list.c
@@ -28,8 +28,19 @@ int list_sort ( list_element_t** _root ) {
 	return -1;
 }
 
-int list_length ( list_element_t* _root ) {
-	return -1;
+int list_length ( list_element_t** _root ) {
+	list_element_t** iter = _root;
+	int ret = 0;
+
+	if( !_root )
+		return -1;
+
+	while(*iter) {
+		ret ++;
+		iter = & (*iter)->next;
+	}
+
+	return ret;
 }
 
 void* list_pop_front ( list_element_t** _root ) {
diff --git a/src/list.h b/src/list.h
index 71594ad..1359955 100644
--- a/src/list.h
+++ b/src/list.h
@@ -20,6 +20,6 @@ int list_add( list_element_t** _root, void* _data );
 
 int list_sort ( list_element_t** _root );
 
-int list_length ( list_element_t* _root );
+int list_length ( list_element_t** _root );
 
 void* list_pop_front ( list_element_t** _root );
-- 
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