+link_t* list_concat(link_t* first, link_t* second) {
+ link_t* head_first = first;
+
+ while (first->next != NULL) {
+ first = first->next;
+ }
+ first->next = second;
+ return head_first;
+}
+
+link_t* list_sort(link_t* head) {
+ int tmp;
+ bool isswaped;
+ link_t* head_first = head;
+
+ do {
+ isswaped = false;
+ while (head->next != NULL) {
+ if (head->value > head->next->value) {
+ tmp = head->value;
+ head->value = head->next->value;
+ head->next->value = tmp;
+ isswaped = true;
+ }
+ head = head->next;
+ }
+ /* Reloop at the beginning of the list until there's values swaped */
+ head = head_first;
+ } while (isswaped);
+ return head_first;
+}
+