diff -r 6a86ad3d8c03 -r d7ca126eab7f src/linked_list.c
--- a/src/linked_list.c	Mon Dec 27 17:16:32 2021 +0100
+++ b/src/linked_list.c	Tue Dec 28 14:16:04 2021 +0100
@@ -396,6 +396,28 @@
     }
 }
 
+int cx_linked_list_compare(
+        void *begin_left,
+        void *begin_right,
+        ptrdiff_t loc_advance,
+        ptrdiff_t loc_data,
+        int follow_ptr,
+        CxListComparator cmp_func
+) {
+    void *left = begin_left, *right = begin_right;
+
+    while (left != NULL && right != NULL) {
+        int result = cmp_func(ll_data(left), ll_data(right));
+        if (result != 0) return result;
+        left = ll_advance(left);
+        right = ll_advance(right);
+    }
+
+    if (left != NULL) { return 1; }
+    else if (right != NULL) { return -1; }
+    else { return 0; }
+}
+
 void cx_linked_list_reverse(
         void **begin,
         void **end,