Refactor list, add attaching functional

src/list/comparison.c

@@ -0,0 +1,36 @@
+/* This software is licensed by the MIT License, see LICENSE file */
+/*                                Copyright © 2022 Gregory Lirent */
+
+#include "include.h"
+
+int list_compare(const list_t* s0, const list_t* s1) {
+    lnode_t *c0, *c1;
+    int c;
+
+    if (s0 == s1) return 0;
+
+    c0 = s0->first;
+    c1 = s1->first;
+
+    for (;;) {
+        if (is_null(c0) || is_null(c1)) {
+            return (c0 == c1) ? 0 : (ssize_t)c0 - (ssize_t)c1;
+        }
+
+        c = lnode_compare(c0, c1);
+
+        if (c != 0) break;
+
+        c0 = c0->next;
+        c1 = c1->next;
+    }
+
+    for (;;) {
+        c0 = c0->next;
+        c1 = c1->next;
+
+        if (is_null(c0) || is_null(c1)) {
+            return (c0 == c1) ? 0 : (ssize_t)c0 - (ssize_t)c1;
+        }
+    }
+}