1 files changed, 83 insertions, 0 deletions
diff --git a/rushs/tinyprintf/dlist/dlist-3.c b/rushs/tinyprintf/dlist/dlist-3.c
new file mode 100644
index 0000000..22b4b52
--- /dev/null
+++ b/rushs/tinyprintf/dlist/dlist-3.c
@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "dlist.h"
+
+void dlist_map_square(struct dlist *list)
+{
+    for (struct dlist_item *i = list->head; i; i = i->next)
+    {
+        i->data *= i->data;
+    }
+}
+
+void dlist_reverse(struct dlist *list)
+{
+    struct dlist_item *tmp;
+    for (struct dlist_item *i = list->head; i; i = i->prev)
+    {
+        tmp = i->next;
+        i->next = i->prev;
+        i->prev = tmp;
+    }
+    tmp = list->tail;
+    list->tail = list->head;
+    list->head = tmp;
+}
+
+struct dlist *dlist_split_at(struct dlist *list, size_t index)
+{
+    if (list->size == 0)
+        return dlist_init();
+    if (index >= list->size)
+    {
+        return NULL;
+    }
+
+    struct dlist *new = dlist_init();
+    if (new == NULL)
+        return NULL;
+    new->size = list->size - index;
+    list->size = index;
+
+    struct dlist_item *i;
+    for (i = list->head; index; index--, i = i->next)
+    {
+        continue;
+    }
+
+    new->head = i;
+    new->tail = list->tail;
+    list->tail = i->prev;
+    if (i->prev)
+    {
+        i->prev->next = NULL;
+    }
+    else
+    {
+        list->head = NULL;
+    }
+    i->prev = NULL;
+    return new;
+}
+
+void dlist_concat(struct dlist *list1, struct dlist *list2)
+{
+    if (list2->head == NULL)
+        return;
+    if (list1->tail == NULL)
+    {
+        list1->head = list2->head;
+        list1->tail = list2->tail;
+        list1->size = list2->size;
+        return;
+    }
+
+    list1->tail->next = list2->head;
+    list2->head->prev = list1->tail;
+    list1->tail = list2->tail;
+    list1->size += list2->size;
+    list2->size = 0;
+    list2->head = NULL;
+    list2->tail = NULL;
+}