1 files changed, 121 insertions, 0 deletions
diff --git a/lib/lwres/include/lwres/list.h b/lib/lwres/include/lwres/list.h
new file mode 100644
index 0000000..c6ab096
--- /dev/null
+++ b/lib/lwres/include/lwres/list.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1997-2001  Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: list.h,v 1.14 2007/06/19 23:47:23 tbox Exp $ */
+
+#ifndef LWRES_LIST_H
+#define LWRES_LIST_H 1
+
+/*! \file lwres/list.h */
+
+#define LWRES_LIST(type) struct { type *head, *tail; }
+#define LWRES_LIST_INIT(list) \
+	do { (list).head = NULL; (list).tail = NULL; } while (0)
+
+#define LWRES_LINK(type) struct { type *prev, *next; }
+#define LWRES_LINK_INIT(elt, link) \
+	do { \
+		(elt)->link.prev = (void *)(-1); \
+		(elt)->link.next = (void *)(-1); \
+	} while (0)
+#define LWRES_LINK_LINKED(elt, link) \
+	((void *)((elt)->link.prev) != (void *)(-1))
+
+#define LWRES_LIST_HEAD(list) ((list).head)
+#define LWRES_LIST_TAIL(list) ((list).tail)
+#define LWRES_LIST_EMPTY(list) LWRES_TF((list).head == NULL)
+
+#define LWRES_LIST_PREPEND(list, elt, link) \
+	do { \
+		if ((list).head != NULL) \
+			(list).head->link.prev = (elt); \
+		else \
+			(list).tail = (elt); \
+		(elt)->link.prev = NULL; \
+		(elt)->link.next = (list).head; \
+		(list).head = (elt); \
+	} while (0)
+
+#define LWRES_LIST_APPEND(list, elt, link) \
+	do { \
+		if ((list).tail != NULL) \
+			(list).tail->link.next = (elt); \
+		else \
+			(list).head = (elt); \
+		(elt)->link.prev = (list).tail; \
+		(elt)->link.next = NULL; \
+		(list).tail = (elt); \
+	} while (0)
+
+#define LWRES_LIST_UNLINK(list, elt, link) \
+	do { \
+		if ((elt)->link.next != NULL) \
+			(elt)->link.next->link.prev = (elt)->link.prev; \
+		else \
+			(list).tail = (elt)->link.prev; \
+		if ((elt)->link.prev != NULL) \
+			(elt)->link.prev->link.next = (elt)->link.next; \
+		else \
+			(list).head = (elt)->link.next; \
+		(elt)->link.prev = (void *)(-1); \
+		(elt)->link.next = (void *)(-1); \
+	} while (0)
+
+#define LWRES_LIST_PREV(elt, link) ((elt)->link.prev)
+#define LWRES_LIST_NEXT(elt, link) ((elt)->link.next)
+
+#define LWRES_LIST_INSERTBEFORE(list, before, elt, link) \
+	do { \
+		if ((before)->link.prev == NULL) \
+			LWRES_LIST_PREPEND(list, elt, link); \
+		else { \
+			(elt)->link.prev = (before)->link.prev; \
+			(before)->link.prev = (elt); \
+			(elt)->link.prev->link.next = (elt); \
+			(elt)->link.next = (before); \
+		} \
+	} while (0)
+
+#define LWRES_LIST_INSERTAFTER(list, after, elt, link) \
+	do { \
+		if ((after)->link.next == NULL) \
+			LWRES_LIST_APPEND(list, elt, link); \
+		else { \
+			(elt)->link.next = (after)->link.next; \
+			(after)->link.next = (elt); \
+			(elt)->link.next->link.prev = (elt); \
+			(elt)->link.prev = (after); \
+		} \
+	} while (0)
+
+#define LWRES_LIST_APPENDLIST(list1, list2, link) \
+	do { \
+		if (LWRES_LIST_EMPTY(list1)) \
+			(list1) = (list2); \
+		else if (!LWRES_LIST_EMPTY(list2)) { \
+			(list1).tail->link.next = (list2).head; \
+			(list2).head->link.prev = (list1).tail; \
+			(list1).tail = (list2).tail; \
+		} \
+		(list2).head = NULL; \
+		(list2).tail = NULL; \
+	} while (0)
+
+#define LWRES_LIST_ENQUEUE(list, elt, link) LWRES_LIST_APPEND(list, elt, link)
+#define LWRES_LIST_DEQUEUE(list, elt, link) LWRES_LIST_UNLINK(list, elt, link)
+
+#endif /* LWRES_LIST_H */