dlist: insert sort [not finished]

src/utils/dlist.c

@@ -19,6 +19,62 @@ dlist_t *_dlist_init(void *el_ptr, int el_siz) {
   return dlist;
 }
 
+void _dlist_insert(dlist_t *dlist, dlist_el_t *new_el, dlist_el_t *prev_el) {
+  if (prev_el != NULL) {
+    new_el->next = prev_el->next;
+    prev_el->next->previous = new_el;
+    new_el->previous = prev_el;
+    prev_el->next = new_el;
+    if (new_el->next == NULL) {
+      dlist->current = new_el;
+      dlist->pointer = new_el;
+    }
+  } else {
+    new_el->next = dlist->current;
+    new_el->previous = NULL;
+    dlist->start = new_el;
+    dlist->current->previous = new_el;
+  }
+  dlist->len++;
+}
+
+void _dlist_insert_end(dlist_t *dlist, dlist_el_t *new_el) {
+  dlist->current->next = new_el;
+  new_el->previous = dlist->current;
+  new_el->next = NULL;
+  dlist->current = new_el;
+  dlist->pointer = new_el;
+  dlist->len++;
+}
+
+void _dlist_insert_sort(dlist_t *dlist, void *el_ptr, int el_siz,
+                        dblist_cb_t *cb) {
+  dlist_el_t *d_el = malloc(sizeof(dlist_el_t));
+  d_el->el_ptr = malloc(el_siz);
+  memcpy(d_el->el_ptr, el_ptr, el_siz);
+
+  dlist_el_t *dlist_item = dlist->start;
+  bool res = true;
+  if (dlist->start == NULL) {
+    dlist->start = d_el;
+    dlist->current = d_el;
+    d_el->next = NULL;
+    d_el->previous = NULL;
+    dlist->pointer = d_el;
+    dlist->len++;
+    return;
+  }
+  for (int i = 0; i < dlist->len; i++) {
+    res = cb(el_ptr, dlist_item->el_ptr);
+    if (!res) {
+      dlist_item = dlist_item->previous;
+      _dlist_insert(dlist, d_el, dlist_item);
+      break;
+    }
+  }
+  if (res) _dlist_insert_end(dlist, d_el);
+}
+
 void _dlist_add(dlist_t *dlist, void *el_ptr, int el_siz, bool prepend) {
   dlist_el_t *d_el = malloc(sizeof(dlist_el_t));
   d_el->el_ptr = malloc(el_siz);
@@ -58,7 +114,7 @@ void *dlist_it_next(dlist_t *dlist) {
   if (dlist->pointer->next != NULL) {
     dlist->pointer = dlist->pointer->next;
     return dlist->pointer->el_ptr;
-  } else  {
+  } else {
     return NULL;
   }
 }