svn commit: trunk/busybox/e2fsprogs/blkid

aldot at busybox.net aldot at busybox.net
Mon Sep 11 09:16:12 UTC 2006


Author: aldot
Date: 2006-09-11 02:16:12 -0700 (Mon, 11 Sep 2006)
New Revision: 16099

Log:
- Tito pointed out that Rob forgot to add e2fsprogs/blkid/list.c


Added:
   trunk/busybox/e2fsprogs/blkid/list.c


Changeset:
Added: trunk/busybox/e2fsprogs/blkid/list.c
===================================================================
--- trunk/busybox/e2fsprogs/blkid/list.c	2006-09-11 01:34:21 UTC (rev 16098)
+++ trunk/busybox/e2fsprogs/blkid/list.c	2006-09-11 09:16:12 UTC (rev 16099)
@@ -0,0 +1,110 @@
+/* vi: set sw=4 ts=4: */
+
+#include "list.h"
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+void __list_add(struct list_head * add,
+	struct list_head * prev,
+	struct list_head * next)
+{
+	next->prev = add;
+	add->next = next;
+	add->prev = prev;
+	prev->next = add;
+}
+
+/*
+ * list_add - add a new entry
+ * @add:	new entry to be added
+ * @head:	list head to add it after
+ *
+ * Insert a new entry after the specified head.
+ * This is good for implementing stacks.
+ */
+void list_add(struct list_head *add, struct list_head *head)
+{
+	__list_add(add, head, head->next);
+}
+
+/*
+ * list_add_tail - add a new entry
+ * @add:	new entry to be added
+ * @head:	list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+void list_add_tail(struct list_head *add, struct list_head *head)
+{
+	__list_add(add, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+void __list_del(struct list_head * prev, struct list_head * next)
+{
+	next->prev = prev;
+	prev->next = next;
+}
+
+/*
+ * list_del - deletes entry from list.
+ * @entry:	the element to delete from the list.
+ *
+ * list_empty() on @entry does not return true after this, @entry is
+ * in an undefined state.
+ */
+void list_del(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+}
+
+/*
+ * list_del_init - deletes entry from list and reinitialize it.
+ * @entry:	the element to delete from the list.
+ */
+void list_del_init(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	INIT_LIST_HEAD(entry);
+}
+
+/*
+ * list_empty - tests whether a list is empty
+ * @head:	the list to test.
+ */
+int list_empty(struct list_head *head)
+{
+	return head->next == head;
+}
+
+/*
+ * list_splice - join two lists
+ * @list:	the new list to add.
+ * @head:	the place to add it in the first list.
+ */
+void list_splice(struct list_head *list, struct list_head *head)
+{
+	struct list_head *first = list->next;
+
+	if (first != list) {
+		struct list_head *last = list->prev;
+		struct list_head *at = head->next;
+
+		first->prev = head;
+		head->next = first;
+
+		last->next = at;
+		at->prev = last;
+	}
+}




More information about the busybox-cvs mailing list