progress

16 files changed, 1937 insertions, 0 deletions

diff --git a/ccan/list/LICENSE b/ccan/list/LICENSE
new file mode 120000
index 0000000..2354d12
--- /dev/null
+++ b/ccan/list/LICENSE
@@ -0,0 +1 @@
+../../licenses/BSD-MIT
\ No newline at end of file
diff --git a/ccan/list/_info b/ccan/list/_info
new file mode 100644
index 0000000..c4f3e2a
--- /dev/null
+++ b/ccan/list/_info
@@ -0,0 +1,72 @@
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+
+/**
+ * list - double linked list routines
+ *
+ * The list header contains routines for manipulating double linked lists.
+ * It defines two types: struct list_head used for anchoring lists, and
+ * struct list_node which is usually embedded in the structure which is placed
+ * in the list.
+ *
+ * Example:
+ *	#include <err.h>
+ *	#include <stdio.h>
+ *	#include <stdlib.h>
+ *	#include <ccan/list/list.h>
+ *
+ *	struct parent {
+ *		const char *name;
+ *		struct list_head children;
+ *		unsigned int num_children;
+ *	};
+ *
+ *	struct child {
+ *		const char *name;
+ *		struct list_node list;
+ *	};
+ *
+ *	int main(int argc, char *argv[])
+ *	{
+ *		struct parent p;
+ *		struct child *c;
+ *		int i;
+ *
+ *		if (argc < 2)
+ *			errx(1, "Usage: %s parent children...", argv[0]);
+ *
+ *		p.name = argv[1];
+ *		list_head_init(&p.children);
+ *		p.num_children = 0;
+ *		for (i = 2; i < argc; i++) {
+ *			c = malloc(sizeof(*c));
+ *			c->name = argv[i];
+ *			list_add(&p.children, &c->list);
+ *			p.num_children++;
+ *		}
+ *
+ *		printf("%s has %u children:", p.name, p.num_children);
+ *		list_for_each(&p.children, c, list)
+ *			printf("%s ", c->name);
+ *		printf("\n");
+ *		return 0;
+ *	}
+ *
+ * License: BSD-MIT
+ * Author: Rusty Russell <rusty@rustcorp.com.au>
+ */
+int main(int argc, char *argv[])
+{
+	if (argc != 2)
+		return 1;
+
+	if (strcmp(argv[1], "depends") == 0) {
+		printf("ccan/str\n");
+		printf("ccan/container_of\n");
+		printf("ccan/check_type\n");
+		return 0;
+	}
+
+	return 1;
+}
diff --git a/ccan/list/list.c b/ccan/list/list.c
new file mode 100644
index 0000000..2717fa3
--- /dev/null
+++ b/ccan/list/list.c
@@ -0,0 +1,43 @@
+/* Licensed under BSD-MIT - see LICENSE file for details */
+#include <stdio.h>
+#include <stdlib.h>
+#include "list.h"
+
+static void *corrupt(const char *abortstr,
+		     const struct list_node *head,
+		     const struct list_node *node,
+		     unsigned int count)
+{
+	if (abortstr) {
+		fprintf(stderr,
+			"%s: prev corrupt in node %p (%u) of %p\n",
+			abortstr, node, count, head);
+		abort();
+	}
+	return NULL;
+}
+
+struct list_node *list_check_node(const struct list_node *node,
+				  const char *abortstr)
+{
+	const struct list_node *p, *n;
+	int count = 0;
+
+	for (p = node, n = node->next; n != node; p = n, n = n->next) {
+		count++;
+		if (n->prev != p)
+			return corrupt(abortstr, node, n, count);
+	}
+	/* Check prev on head node. */
+	if (node->prev != p)
+		return corrupt(abortstr, node, node, 0);
+
+	return (struct list_node *)node;
+}
+
+struct list_head *list_check(const struct list_head *h, const char *abortstr)
+{
+	if (!list_check_node(&h->n, abortstr))
+		return NULL;
+	return (struct list_head *)h;
+}
diff --git a/ccan/list/list.h b/ccan/list/list.h
new file mode 100644
index 0000000..a6b0038
--- /dev/null
+++ b/ccan/list/list.h
@@ -0,0 +1,842 @@
+/* Licensed under BSD-MIT - see LICENSE file for details */
+#ifndef CCAN_LIST_H
+#define CCAN_LIST_H
+//#define CCAN_LIST_DEBUG 1
+#include <stdbool.h>
+#include <assert.h>
+#include <ccan/str/str.h>
+#include <ccan/container_of/container_of.h>
+#include <ccan/check_type/check_type.h>
+
+/**
+ * struct list_node - an entry in a doubly-linked list
+ * @next: next entry (self if empty)
+ * @prev: previous entry (self if empty)
+ *
+ * This is used as an entry in a linked list.
+ * Example:
+ *	struct child {
+ *		const char *name;
+ *		// Linked list of all us children.
+ *		struct list_node list;
+ *	};
+ */
+struct list_node
+{
+	struct list_node *next, *prev;
+};
+
+/**
+ * struct list_head - the head of a doubly-linked list
+ * @h: the list_head (containing next and prev pointers)
+ *
+ * This is used as the head of a linked list.
+ * Example:
+ *	struct parent {
+ *		const char *name;
+ *		struct list_head children;
+ *		unsigned int num_children;
+ *	};
+ */
+struct list_head
+{
+	struct list_node n;
+};
+
+/**
+ * list_check - check head of a list for consistency
+ * @h: the list_head
+ * @abortstr: the location to print on aborting, or NULL.
+ *
+ * Because list_nodes have redundant information, consistency checking between
+ * the back and forward links can be done.  This is useful as a debugging check.
+ * If @abortstr is non-NULL, that will be printed in a diagnostic if the list
+ * is inconsistent, and the function will abort.
+ *
+ * Returns the list head if the list is consistent, NULL if not (it
+ * can never return NULL if @abortstr is set).
+ *
+ * See also: list_check_node()
+ *
+ * Example:
+ *	static void dump_parent(struct parent *p)
+ *	{
+ *		struct child *c;
+ *
+ *		printf("%s (%u children):\n", p->name, p->num_children);
+ *		list_check(&p->children, "bad child list");
+ *		list_for_each(&p->children, c, list)
+ *			printf(" -> %s\n", c->name);
+ *	}
+ */
+struct list_head *list_check(const struct list_head *h, const char *abortstr);
+
+/**
+ * list_check_node - check node of a list for consistency
+ * @n: the list_node
+ * @abortstr: the location to print on aborting, or NULL.
+ *
+ * Check consistency of the list node is in (it must be in one).
+ *
+ * See also: list_check()
+ *
+ * Example:
+ *	static void dump_child(const struct child *c)
+ *	{
+ *		list_check_node(&c->list, "bad child list");
+ *		printf("%s\n", c->name);
+ *	}
+ */
+struct list_node *list_check_node(const struct list_node *n,
+				  const char *abortstr);
+
+#define LIST_LOC __FILE__  ":" stringify(__LINE__)
+#ifdef CCAN_LIST_DEBUG
+#define list_debug(h, loc) list_check((h), loc)
+#define list_debug_node(n, loc) list_check_node((n), loc)
+#else
+#define list_debug(h, loc) ((void)loc, h)
+#define list_debug_node(n, loc) ((void)loc, n)
+#endif
+
+/**
+ * LIST_HEAD_INIT - initializer for an empty list_head
+ * @name: the name of the list.
+ *
+ * Explicit initializer for an empty list.
+ *
+ * See also:
+ *	LIST_HEAD, list_head_init()
+ *
+ * Example:
+ *	static struct list_head my_list = LIST_HEAD_INIT(my_list);
+ */
+#define LIST_HEAD_INIT(name) { { &(name).n, &(name).n } }
+
+/**
+ * LIST_HEAD - define and initialize an empty list_head
+ * @name: the name of the list.
+ *
+ * The LIST_HEAD macro defines a list_head and initializes it to an empty
+ * list.  It can be prepended by "static" to define a static list_head.
+ *
+ * See also:
+ *	LIST_HEAD_INIT, list_head_init()
+ *
+ * Example:
+ *	static LIST_HEAD(my_global_list);
+ */
+#define LIST_HEAD(name) \
+	struct list_head name = LIST_HEAD_INIT(name)
+
+/**
+ * list_head_init - initialize a list_head
+ * @h: the list_head to set to the empty list
+ *
+ * Example:
+ *	...
+ *	struct parent *parent = malloc(sizeof(*parent));
+ *
+ *	list_head_init(&parent->children);
+ *	parent->num_children = 0;
+ */
+static inline void list_head_init(struct list_head *h)
+{
+	h->n.next = h->n.prev = &h->n;
+}
+
+/**
+ * list_node_init - initialize a list_node
+ * @n: the list_node to link to itself.
+ *
+ * You don't need to use this normally!  But it lets you list_del(@n)
+ * safely.
+ */
+static inline void list_node_init(struct list_node *n)
+{
+	n->next = n->prev = n;
+}
+
+/**
+ * list_add_after - add an entry after an existing node in a linked list
+ * @h: the list_head to add the node to (for debugging)
+ * @p: the existing list_node to add the node after
+ * @n: the new list_node to add to the list.
+ *
+ * The existing list_node must already be a member of the list.
+ * The new list_node does not need to be initialized; it will be overwritten.
+ *
+ * Example:
+ *	struct child c1, c2, c3;
+ *	LIST_HEAD(h);
+ *
+ *	list_add_tail(&h, &c1.list);
+ *	list_add_tail(&h, &c3.list);
+ *	list_add_after(&h, &c1.list, &c2.list);
+ */
+#define list_add_after(h, p, n) list_add_after_(h, p, n, LIST_LOC)
+static inline void list_add_after_(struct list_head *h,
+				   struct list_node *p,
+				   struct list_node *n,
+				   const char *abortstr)
+{
+	n->next = p->next;
+	n->prev = p;
+	p->next->prev = n;
+	p->next = n;
+	(void)list_debug(h, abortstr);
+}
+
+/**
+ * list_add - add an entry at the start of a linked list.
+ * @h: the list_head to add the node to
+ * @n: the list_node to add to the list.
+ *
+ * The list_node does not need to be initialized; it will be overwritten.
+ * Example:
+ *	struct child *child = malloc(sizeof(*child));
+ *
+ *	child->name = "marvin";
+ *	list_add(&parent->children, &child->list);
+ *	parent->num_children++;
+ */
+#define list_add(h, n) list_add_(h, n, LIST_LOC)
+static inline void list_add_(struct list_head *h,
+			     struct list_node *n,
+			     const char *abortstr)
+{
+	list_add_after_(h, &h->n, n, abortstr);
+}
+
+/**
+ * list_add_before - add an entry before an existing node in a linked list
+ * @h: the list_head to add the node to (for debugging)
+ * @p: the existing list_node to add the node before
+ * @n: the new list_node to add to the list.
+ *
+ * The existing list_node must already be a member of the list.
+ * The new list_node does not need to be initialized; it will be overwritten.
+ *
+ * Example:
+ *	list_head_init(&h);
+ *	list_add_tail(&h, &c1.list);
+ *	list_add_tail(&h, &c3.list);
+ *	list_add_before(&h, &c3.list, &c2.list);
+ */
+#define list_add_before(h, p, n) list_add_before_(h, p, n, LIST_LOC)
+static inline void list_add_before_(struct list_head *h,
+				    struct list_node *p,
+				    struct list_node *n,
+				    const char *abortstr)
+{
+	n->next = p;
+	n->prev = p->prev;
+	p->prev->next = n;
+	p->prev = n;
+	(void)list_debug(h, abortstr);
+}
+
+/**
+ * list_add_tail - add an entry at the end of a linked list.
+ * @h: the list_head to add the node to
+ * @n: the list_node to add to the list.
+ *
+ * The list_node does not need to be initialized; it will be overwritten.
+ * Example:
+ *	list_add_tail(&parent->children, &child->list);
+ *	parent->num_children++;
+ */
+#define list_add_tail(h, n) list_add_tail_(h, n, LIST_LOC)
+static inline void list_add_tail_(struct list_head *h,
+				  struct list_node *n,
+				  const char *abortstr)
+{
+	list_add_before_(h, &h->n, n, abortstr);
+}
+
+/**
+ * list_empty - is a list empty?
+ * @h: the list_head
+ *
+ * If the list is empty, returns true.
+ *
+ * Example:
+ *	assert(list_empty(&parent->children) == (parent->num_children == 0));
+ */
+#define list_empty(h) list_empty_(h, LIST_LOC)
+static inline bool list_empty_(const struct list_head *h, const char* abortstr)
+{
+	(void)list_debug(h, abortstr);
+	return h->n.next == &h->n;
+}
+
+/**
+ * list_empty_nodebug - is a list empty (and don't perform debug checks)?
+ * @h: the list_head
+ *
+ * If the list is empty, returns true.
+ * This differs from list_empty() in that if CCAN_LIST_DEBUG is set it
+ * will NOT perform debug checks. Only use this function if you REALLY
+ * know what you're doing.
+ *
+ * Example:
+ *	assert(list_empty_nodebug(&parent->children) == (parent->num_children == 0));
+ */
+#ifndef CCAN_LIST_DEBUG
+#define list_empty_nodebug(h) list_empty(h)
+#else
+static inline bool list_empty_nodebug(const struct list_head *h)
+{
+	return h->n.next == &h->n;
+}
+#endif
+
+/**
+ * list_empty_nocheck - is a list empty?
+ * @h: the list_head
+ *
+ * If the list is empty, returns true. This doesn't perform any
+ * debug check for list consistency, so it can be called without
+ * locks, racing with the list being modified. This is ok for
+ * checks where an incorrect result is not an issue (optimized
+ * bail out path for example).
+ */
+static inline bool list_empty_nocheck(const struct list_head *h)
+{
+	return h->n.next == &h->n;
+}
+
+/**
+ * list_del - delete an entry from an (unknown) linked list.
+ * @n: the list_node to delete from the list.
+ *
+ * Note that this leaves @n in an undefined state; it can be added to
+ * another list, but not deleted again.
+ *
+ * See also:
+ *	list_del_from(), list_del_init()
+ *
+ * Example:
+ *	list_del(&child->list);
+ *	parent->num_children--;
+ */
+#define list_del(n) list_del_(n, LIST_LOC)
+static inline void list_del_(struct list_node *n, const char* abortstr)
+{
+	(void)list_debug_node(n, abortstr);
+	n->next->prev = n->prev;
+	n->prev->next = n->next;
+#ifdef CCAN_LIST_DEBUG
+	/* Catch use-after-del. */
+	n->next = n->prev = NULL;
+#endif
+}
+
+/**
+ * list_del_init - delete a node, and reset it so it can be deleted again.
+ * @n: the list_node to be deleted.
+ *
+ * list_del(@n) or list_del_init() again after this will be safe,
+ * which can be useful in some cases.
+ *
+ * See also:
+ *	list_del_from(), list_del()
+ *
+ * Example:
+ *	list_del_init(&child->list);
+ *	parent->num_children--;
+ */
+#define list_del_init(n) list_del_init_(n, LIST_LOC)
+static inline void list_del_init_(struct list_node *n, const char *abortstr)
+{
+	list_del_(n, abortstr);
+	list_node_init(n);
+}
+
+/**
+ * list_del_from - delete an entry from a known linked list.
+ * @h: the list_head the node is in.
+ * @n: the list_node to delete from the list.
+ *
+ * This explicitly indicates which list a node is expected to be in,
+ * which is better documentation and can catch more bugs.
+ *
+ * See also: list_del()
+ *
+ * Example:
+ *	list_del_from(&parent->children, &child->list);
+ *	parent->num_children--;
+ */
+static inline void list_del_from(struct list_head *h, struct list_node *n)
+{
+#ifdef CCAN_LIST_DEBUG
+	{
+		/* Thorough check: make sure it was in list! */
+		struct list_node *i;
+		for (i = h->n.next; i != n; i = i->next)
+			assert(i != &h->n);
+	}
+#endif /* CCAN_LIST_DEBUG */
+
+	/* Quick test that catches a surprising number of bugs. */
+	assert(!list_empty(h));
+	list_del(n);
+}
+
+/**
+ * list_swap - swap out an entry from an (unknown) linked list for a new one.
+ * @o: the list_node to replace from the list.
+ * @n: the list_node to insert in place of the old one.
+ *
+ * Note that this leaves @o in an undefined state; it can be added to
+ * another list, but not deleted/swapped again.
+ *
+ * See also:
+ *	list_del()
+ *
+ * Example:
+ *	struct child x1, x2;
+ *	LIST_HEAD(xh);
+ *
+ *	list_add(&xh, &x1.list);
+ *	list_swap(&x1.list, &x2.list);
+ */
+#define list_swap(o, n) list_swap_(o, n, LIST_LOC)
+static inline void list_swap_(struct list_node *o,
+			      struct list_node *n,
+			      const char* abortstr)
+{
+	(void)list_debug_node(o, abortstr);
+	*n = *o;
+	n->next->prev = n;
+	n->prev->next = n;
+#ifdef CCAN_LIST_DEBUG
+	/* Catch use-after-del. */
+	o->next = o->prev = NULL;
+#endif
+}
+
+/**
+ * list_entry - convert a list_node back into the structure containing it.
+ * @n: the list_node
+ * @type: the type of the entry
+ * @member: the list_node member of the type
+ *
+ * Example:
+ *	// First list entry is children.next; convert back to child.
+ *	child = list_entry(parent->children.n.next, struct child, list);
+ *
+ * See Also:
+ *	list_top(), list_for_each()
+ */
+#define list_entry(n, type, member) container_of(n, type, member)
+
+/**
+ * list_top - get the first entry in a list
+ * @h: the list_head
+ * @type: the type of the entry
+ * @member: the list_node member of the type
+ *
+ * If the list is empty, returns NULL.
+ *
+ * Example:
+ *	struct child *first;
+ *	first = list_top(&parent->children, struct child, list);
+ *	if (!first)
+ *		printf("Empty list!\n");
+ */
+#define list_top(h, type, member)					\
+	((type *)list_top_((h), list_off_(type, member)))
+
+static inline const void *list_top_(const struct list_head *h, size_t off)
+{
+	if (list_empty(h))
+		return NULL;
+	return (const char *)h->n.next - off;
+}
+
+/**
+ * list_pop - remove the first entry in a list
+ * @h: the list_head
+ * @type: the type of the entry
+ * @member: the list_node member of the type
+ *
+ * If the list is empty, returns NULL.
+ *
+ * Example:
+ *	struct child *one;
+ *	one = list_pop(&parent->children, struct child, list);
+ *	if (!one)
+ *		printf("Empty list!\n");
+ */
+#define list_pop(h, type, member)					\
+	((type *)list_pop_((h), list_off_(type, member)))
+
+static inline const void *list_pop_(const struct list_head *h, size_t off)
+{
+	struct list_node *n;
+
+	if (list_empty(h))
+		return NULL;
+	n = h->n.next;
+	list_del(n);
+	return (const char *)n - off;
+}
+
+/**
+ * list_tail - get the last entry in a list
+ * @h: the list_head
+ * @type: the type of the entry
+ * @member: the list_node member of the type
+ *
+ * If the list is empty, returns NULL.
+ *
+ * Example:
+ *	struct child *last;
+ *	last = list_tail(&parent->children, struct child, list);
+ *	if (!last)
+ *		printf("Empty list!\n");
+ */
+#define list_tail(h, type, member) \
+	((type *)list_tail_((h), list_off_(type, member)))
+
+static inline const void *list_tail_(const struct list_head *h, size_t off)
+{
+	if (list_empty(h))
+		return NULL;
+	return (const char *)h->n.prev - off;
+}
+
+/**
+ * list_for_each - iterate through a list.
+ * @h: the list_head (warning: evaluated multiple times!)
+ * @i: the structure containing the list_node
+ * @member: the list_node member of the structure
+ *
+ * This is a convenient wrapper to iterate @i over the entire list.  It's
+ * a for loop, so you can break and continue as normal.
+ *
+ * Example:
+ *	list_for_each(&parent->children, child, list)
+ *		printf("Name: %s\n", child->name);
+ */
+#define list_for_each(h, i, member)					\
+	list_for_each_off(h, i, list_off_var_(i, member))
+
+/**
+ * list_for_each_rev - iterate through a list backwards.
+ * @h: the list_head
+ * @i: the structure containing the list_node
+ * @member: the list_node member of the structure
+ *
+ * This is a convenient wrapper to iterate @i over the entire list.  It's
+ * a for loop, so you can break and continue as normal.
+ *
+ * Example:
+ *	list_for_each_rev(&parent->children, child, list)
+ *		printf("Name: %s\n", child->name);
+ */
+#define list_for_each_rev(h, i, member)					\
+	list_for_each_rev_off(h, i, list_off_var_(i, member))
+
+/**
+ * list_for_each_rev_safe - iterate through a list backwards,
+ * maybe during deletion
+ * @h: the list_head
+ * @i: the structure containing the list_node
+ * @nxt: the structure containing the list_node
+ * @member: the list_node member of the structure
+ *
+ * This is a convenient wrapper to iterate @i over the entire list backwards.
+ * It's a for loop, so you can break and continue as normal.  The extra
+ * variable * @nxt is used to hold the next element, so you can delete @i
+ * from the list.
+ *
+ * Example:
+ *	struct child *next;
+ *	list_for_each_rev_safe(&parent->children, child, next, list) {
+ *		printf("Name: %s\n", child->name);
+ *	}
+ */
+#define list_for_each_rev_safe(h, i, nxt, member)			\
+	list_for_each_rev_safe_off(h, i, nxt, list_off_var_(i, member))
+
+/**
+ * list_for_each_safe - iterate through a list, maybe during deletion
+ * @h: the list_head
+ * @i: the structure containing the list_node
+ * @nxt: the structure containing the list_node
+ * @member: the list_node member of the structure
+ *
+ * This is a convenient wrapper to iterate @i over the entire list.  It's
+ * a for loop, so you can break and continue as normal.  The extra variable
+ * @nxt is used to hold the next element, so you can delete @i from the list.
+ *
+ * Example:
+ *	list_for_each_safe(&parent->children, child, next, list) {
+ *		list_del(&child->list);
+ *		parent->num_children--;
+ *	}
+ */
+#define list_for_each_safe(h, i, nxt, member)				\
+	list_for_each_safe_off(h, i, nxt, list_off_var_(i, member))
+
+/**
+ * list_next - get the next entry in a list
+ * @h: the list_head
+ * @i: a pointer to an entry in the list.
+ * @member: the list_node member of the structure
+ *
+ * If @i was the last entry in the list, returns NULL.
+ *
+ * Example:
+ *	struct child *second;
+ *	second = list_next(&parent->children, first, list);
+ *	if (!second)
+ *		printf("No second child!\n");
+ */
+#define list_next(h, i, member)						\
+	((list_typeof(i))list_entry_or_null(list_debug(h,		\
+					    __FILE__ ":" stringify(__LINE__)), \
+					    (i)->member.next,		\
+					    list_off_var_((i), member)))
+
+/**
+ * list_prev - get the previous entry in a list
+ * @h: the list_head
+ * @i: a pointer to an entry in the list.
+ * @member: the list_node member of the structure
+ *
+ * If @i was the first entry in the list, returns NULL.
+ *
+ * Example:
+ *	first = list_prev(&parent->children, second, list);
+ *	if (!first)
+ *		printf("Can't go back to first child?!\n");
+ */
+#define list_prev(h, i, member)						\
+	((list_typeof(i))list_entry_or_null(list_debug(h,		\
+					    __FILE__ ":" stringify(__LINE__)), \
+					    (i)->member.prev,		\
+					    list_off_var_((i), member)))
+
+/**
+ * list_append_list - empty one list onto the end of another.
+ * @to: the list to append into
+ * @from: the list to empty.
+ *
+ * This takes the entire contents of @from and moves it to the end of
+ * @to.  After this @from will be empty.
+ *
+ * Example:
+ *	struct list_head adopter;
+ *
+ *	list_append_list(&adopter, &parent->children);
+ *	assert(list_empty(&parent->children));
+ *	parent->num_children = 0;
+ */
+#define list_append_list(t, f) list_append_list_(t, f,			\
+				   __FILE__ ":" stringify(__LINE__))
+static inline void list_append_list_(struct list_head *to,
+				     struct list_head *from,
+				     const char *abortstr)
+{
+	struct list_node *from_tail = list_debug(from, abortstr)->n.prev;
+	struct list_node *to_tail = list_debug(to, abortstr)->n.prev;
+
+	/* Sew in head and entire list. */
+	to->n.prev = from_tail;
+	from_tail->next = &to->n;
+	to_tail->next = &from->n;
+	from->n.prev = to_tail;
+
+	/* Now remove head. */
+	list_del(&from->n);
+	list_head_init(from);
+}
+
+/**
+ * list_prepend_list - empty one list into the start of another.
+ * @to: the list to prepend into
+ * @from: the list to empty.
+ *
+ * This takes the entire contents of @from and moves it to the start
+ * of @to.  After this @from will be empty.
+ *
+ * Example:
+ *	list_prepend_list(&adopter, &parent->children);
+ *	assert(list_empty(&parent->children));
+ *	parent->num_children = 0;
+ */
+#define list_prepend_list(t, f) list_prepend_list_(t, f, LIST_LOC)
+static inline void list_prepend_list_(struct list_head *to,
+				      struct list_head *from,
+				      const char *abortstr)
+{
+	struct list_node *from_tail = list_debug(from, abortstr)->n.prev;
+	struct list_node *to_head = list_debug(to, abortstr)->n.next;
+
+	/* Sew in head and entire list. */
+	to->n.next = &from->n;
+	from->n.prev = &to->n;
+	to_head->prev = from_tail;
+	from_tail->next = to_head;
+
+	/* Now remove head. */
+	list_del(&from->n);
+	list_head_init(from);
+}
+
+/* internal macros, do not use directly */
+#define list_for_each_off_dir_(h, i, off, dir)				\
+	for (i = list_node_to_off_(list_debug(h, LIST_LOC)->n.dir,	\
+				   (off));				\
+	list_node_from_off_((void *)i, (off)) != &(h)->n;		\
+	i = list_node_to_off_(list_node_from_off_((void *)i, (off))->dir, \
+			      (off)))
+
+#define list_for_each_safe_off_dir_(h, i, nxt, off, dir)		\
+	for (i = list_node_to_off_(list_debug(h, LIST_LOC)->n.dir,	\
+				   (off)),				\
+	nxt = list_node_to_off_(list_node_from_off_(i, (off))->dir,	\
+				(off));					\
+	list_node_from_off_(i, (off)) != &(h)->n;			\
+	i = nxt,							\
+	nxt = list_node_to_off_(list_node_from_off_(i, (off))->dir,	\
+				(off)))
+
+/**
+ * list_for_each_off - iterate through a list of memory regions.
+ * @h: the list_head
+ * @i: the pointer to a memory region wich contains list node data.
+ * @off: offset(relative to @i) at which list node data resides.
+ *
+ * This is a low-level wrapper to iterate @i over the entire list, used to
+ * implement all oher, more high-level, for-each constructs. It's a for loop,
+ * so you can break and continue as normal.
+ *
+ * WARNING! Being the low-level macro that it is, this wrapper doesn't know
+ * nor care about the type of @i. The only assumption made is that @i points
+ * to a chunk of memory that at some @offset, relative to @i, contains a
+ * properly filled `struct list_node' which in turn contains pointers to
+ * memory chunks and it's turtles all the way down. With all that in mind
+ * remember that given the wrong pointer/offset couple this macro will
+ * happily churn all you memory until SEGFAULT stops it, in other words
+ * caveat emptor.
+ *
+ * It is worth mentioning that one of legitimate use-cases for that wrapper
+ * is operation on opaque types with known offset for `struct list_node'
+ * member(preferably 0), because it allows you not to disclose the type of
+ * @i.
+ *
+ * Example:
+ *	list_for_each_off(&parent->children, child,
+ *				offsetof(struct child, list))
+ *		printf("Name: %s\n", child->name);
+ */
+#define list_for_each_off(h, i, off)                                    \
+	list_for_each_off_dir_((h),(i),(off),next)
+
+/**
+ * list_for_each_rev_off - iterate through a list of memory regions backwards
+ * @h: the list_head
+ * @i: the pointer to a memory region wich contains list node data.
+ * @off: offset(relative to @i) at which list node data resides.
+ *
+ * See list_for_each_off for details
+ */
+#define list_for_each_rev_off(h, i, off)                                    \
+	list_for_each_off_dir_((h),(i),(off),prev)
+
+/**
+ * list_for_each_safe_off - iterate through a list of memory regions, maybe
+ * during deletion
+ * @h: the list_head
+ * @i: the pointer to a memory region wich contains list node data.
+ * @nxt: the structure containing the list_node
+ * @off: offset(relative to @i) at which list node data resides.
+ *
+ * For details see `list_for_each_off' and `list_for_each_safe'
+ * descriptions.
+ *
+ * Example:
+ *	list_for_each_safe_off(&parent->children, child,
+ *		next, offsetof(struct child, list))
+ *		printf("Name: %s\n", child->name);
+ */
+#define list_for_each_safe_off(h, i, nxt, off)                          \
+	list_for_each_safe_off_dir_((h),(i),(nxt),(off),next)
+
+/**
+ * list_for_each_rev_safe_off - iterate backwards through a list of
+ * memory regions, maybe during deletion
+ * @h: the list_head
+ * @i: the pointer to a memory region wich contains list node data.
+ * @nxt: the structure containing the list_node
+ * @off: offset(relative to @i) at which list node data resides.
+ *
+ * For details see `list_for_each_rev_off' and `list_for_each_rev_safe'
+ * descriptions.
+ *
+ * Example:
+ *	list_for_each_rev_safe_off(&parent->children, child,
+ *		next, offsetof(struct child, list))
+ *		printf("Name: %s\n", child->name);
+ */
+#define list_for_each_rev_safe_off(h, i, nxt, off)                      \
+	list_for_each_safe_off_dir_((h),(i),(nxt),(off),prev)
+
+/* Other -off variants. */
+#define list_entry_off(n, type, off)		\
+	((type *)list_node_from_off_((n), (off)))
+
+#define list_head_off(h, type, off)		\
+	((type *)list_head_off((h), (off)))
+
+#define list_tail_off(h, type, off)		\
+	((type *)list_tail_((h), (off)))
+
+#define list_add_off(h, n, off)                 \
+	list_add((h), list_node_from_off_((n), (off)))
+
+#define list_del_off(n, off)                    \
+	list_del(list_node_from_off_((n), (off)))
+
+#define list_del_from_off(h, n, off)			\
+	list_del_from(h, list_node_from_off_((n), (off)))
+
+/* Offset helper functions so we only single-evaluate. */
+static inline void *list_node_to_off_(struct list_node *node, size_t off)
+{
+	return (void *)((char *)node - off);
+}
+static inline struct list_node *list_node_from_off_(void *ptr, size_t off)
+{
+	return (struct list_node *)((char *)ptr + off);
+}
+
+/* Get the offset of the member, but make sure it's a list_node. */
+#define list_off_(type, member)					\
+	(container_off(type, member) +				\
+	 check_type(((type *)0)->member, struct list_node))
+
+#define list_off_var_(var, member)			\
+	(container_off_var(var, member) +		\
+	 check_type(var->member, struct list_node))
+
+#if HAVE_TYPEOF
+#define list_typeof(var) typeof(var)
+#else
+#define list_typeof(var) void *
+#endif
+
+/* Returns member, or NULL if at end of list. */
+static inline void *list_entry_or_null(const struct list_head *h,
+				       const struct list_node *n,
+				       size_t off)
+{
+	if (n == &h->n)
+		return NULL;
+	return (char *)n - off;
+}
+#endif /* CCAN_LIST_H */
diff --git a/ccan/list/test/compile_ok-constant.c b/ccan/list/test/compile_ok-constant.c
new file mode 100644
index 0000000..c57cdad
--- /dev/null
+++ b/ccan/list/test/compile_ok-constant.c
@@ -0,0 +1,49 @@
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include <stdbool.h>
+#include <stdio.h>
+
+struct child {
+	const char *name;
+	struct list_node list;
+};
+
+static bool children(const struct list_head *list)
+{
+	return !list_empty(list);
+}
+
+static const struct child *first_child(const struct list_head *list)
+{
+	return list_top(list, struct child, list);
+}
+
+static const struct child *last_child(const struct list_head *list)
+{
+	return list_tail(list, struct child, list);
+}
+
+static void check_children(const struct list_head *list)
+{
+	list_check(list, "bad child list");
+}
+
+static void print_children(const struct list_head *list)
+{
+	const struct child *c;
+	list_for_each(list, c, list)
+		printf("%s\n", c->name);
+}
+
+int main(void)
+{
+	LIST_HEAD(h);
+
+	children(&h);
+	first_child(&h);
+	last_child(&h);
+	check_children(&h);
+	print_children(&h);
+	return 0;
+}
diff --git a/ccan/list/test/helper.c b/ccan/list/test/helper.c
new file mode 100644
index 0000000..4fb1c5a
--- /dev/null
+++ b/ccan/list/test/helper.c
@@ -0,0 +1,56 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include <time.h>
+
+#include <ccan/list/list.h>
+#include "helper.h"
+
+#define ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING \
+  (42)
+
+struct opaque {
+  struct list_node list;
+  size_t secret_offset;
+  char   secret_drawer[42];
+};
+
+static bool not_randomized = true;
+
+struct opaque *create_opaque_blob(void)
+{
+  struct opaque *blob = calloc(1, sizeof(struct opaque));
+
+  if (not_randomized) {
+    srandom((int)time(NULL));
+    not_randomized = false;
+  }
+
+  blob->secret_offset = random() % (sizeof(blob->secret_drawer));
+  blob->secret_drawer[blob->secret_offset] =
+    ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING;
+
+  return blob;
+}
+
+bool if_blobs_know_the_secret(struct opaque *blob)
+{
+  bool answer = true;
+  int i;
+  for (i = 0; i < sizeof(blob->secret_drawer) /
+               sizeof(blob->secret_drawer[0]); i++)
+          if (i != blob->secret_offset)
+                  answer = answer && (blob->secret_drawer[i] == 0);
+          else
+                  answer = answer &&
+                          (blob->secret_drawer[blob->secret_offset] ==
+           ANSWER_TO_THE_ULTIMATE_QUESTION_OF_LIFE_THE_UNIVERSE_AND_EVERYTHING);
+
+  return answer;
+}
+
+void destroy_opaque_blob(struct opaque *blob)
+{
+  free(blob);
+}
+
+
diff --git a/ccan/list/test/helper.h b/ccan/list/test/helper.h
new file mode 100644
index 0000000..4b64a7d
--- /dev/null
+++ b/ccan/list/test/helper.h
@@ -0,0 +1,9 @@
+/* These are in a separate C file so we can test undefined structures. */
+struct opaque;
+typedef struct opaque opaque_t;
+
+opaque_t *create_opaque_blob(void);
+bool if_blobs_know_the_secret(opaque_t *blob);
+void destroy_opaque_blob(opaque_t *blob);
+
+
diff --git a/ccan/list/test/run-CCAN_LIST_DEBUG.c b/ccan/list/test/run-CCAN_LIST_DEBUG.c
new file mode 100644
index 0000000..b8e5165
--- /dev/null
+++ b/ccan/list/test/run-CCAN_LIST_DEBUG.c
@@ -0,0 +1,60 @@
+/* Check that CCAN_LIST_DEBUG works */
+#include <setjmp.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <err.h>
+
+/* We don't actually want it to exit... */
+static jmp_buf aborted;
+#define abort() longjmp(aborted, 1)
+
+#define fprintf my_fprintf
+static char printf_buffer[1000];
+
+static int my_fprintf(FILE *stream, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+	(void)stream;
+	va_start(ap, format);
+	ret = vsprintf(printf_buffer, format, ap);
+	va_end(ap);
+	return ret;
+}
+
+#define CCAN_LIST_DEBUG 1
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+
+int main(void)
+{
+	struct list_head list;
+	struct list_node n1;
+	char expect[100];
+
+	plan_tests(2);
+	/* Empty list. */
+	list.n.next = &list.n;
+	list.n.prev = &list.n;
+	ok1(list_check(&list, NULL) == &list);
+
+	/* Bad back ptr */
+	list.n.prev = &n1;
+
+	/* Aborting version. */
+	sprintf(expect, "run-CCAN_LIST_DEBUG.c:51: prev corrupt in node %p (0) of %p\n",
+		&list, &list);
+	if (setjmp(aborted) == 0) {
+		assert(list_empty(&list));
+		fail("list_empty on empty with bad back ptr didn't fail!");
+	} else {
+		/* __FILE__ might give full path. */
+		int prep = strlen(printf_buffer) - strlen(expect);
+		ok1(prep >= 0 && strcmp(printf_buffer + prep, expect) == 0);
+	}
+
+	return exit_status();
+}
diff --git a/ccan/list/test/run-check-corrupt.c b/ccan/list/test/run-check-corrupt.c
new file mode 100644
index 0000000..94c2e67
--- /dev/null
+++ b/ccan/list/test/run-check-corrupt.c
@@ -0,0 +1,90 @@
+#include <setjmp.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <err.h>
+
+/* We don't actually want it to exit... */
+static jmp_buf aborted;
+#define abort() longjmp(aborted, 1)
+
+#define fprintf my_fprintf
+static char printf_buffer[1000];
+
+static int my_fprintf(FILE *stream, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+	(void)stream;
+	va_start(ap, format);
+	ret = vsprintf(printf_buffer, format, ap);
+	va_end(ap);
+	return ret;
+}
+
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+
+int main(void)
+{
+	struct list_head list;
+	struct list_node n1;
+	char expect[100];
+
+	plan_tests(9);
+	/* Empty list. */
+	list.n.next = &list.n;
+	list.n.prev = &list.n;
+	ok1(list_check(&list, NULL) == &list);
+
+	/* Bad back ptr */
+	list.n.prev = &n1;
+	/* Non-aborting version. */
+	ok1(list_check(&list, NULL) == NULL);
+
+	/* Aborting version. */
+	sprintf(expect, "test message: prev corrupt in node %p (0) of %p\n",
+		&list, &list);
+	if (setjmp(aborted) == 0) {
+		list_check(&list, "test message");
+		fail("list_check on empty with bad back ptr didn't fail!");
+	} else {
+		ok1(strcmp(printf_buffer, expect) == 0);
+	}
+
+	/* n1 in list. */
+	list.n.next = &n1;
+	list.n.prev = &n1;
+	n1.prev = &list.n;
+	n1.next = &list.n;
+	ok1(list_check(&list, NULL) == &list);
+	ok1(list_check_node(&n1, NULL) == &n1);
+
+	/* Bad back ptr */
+	n1.prev = &n1;
+	ok1(list_check(&list, NULL) == NULL);
+	ok1(list_check_node(&n1, NULL) == NULL);
+
+	/* Aborting version. */
+	sprintf(expect, "test message: prev corrupt in node %p (1) of %p\n",
+		&n1, &list);
+	if (setjmp(aborted) == 0) {
+		list_check(&list, "test message");
+		fail("list_check on n1 bad back ptr didn't fail!");
+	} else {
+		ok1(strcmp(printf_buffer, expect) == 0);
+	}
+
+	sprintf(expect, "test message: prev corrupt in node %p (0) of %p\n",
+		&n1, &n1);
+	if (setjmp(aborted) == 0) {
+		list_check_node(&n1, "test message");
+		fail("list_check_node on n1 bad back ptr didn't fail!");
+	} else {
+		ok1(strcmp(printf_buffer, expect) == 0);
+	}
+
+	return exit_status();
+}
diff --git a/ccan/list/test/run-check-nonconst.c b/ccan/list/test/run-check-nonconst.c
new file mode 100644
index 0000000..d3cb652
--- /dev/null
+++ b/ccan/list/test/run-check-nonconst.c
@@ -0,0 +1,27 @@
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include "helper.h"
+
+struct child {
+	const char *name;
+	struct list_node list;
+};
+
+int main(void)
+{
+	struct child c1, c2;
+	struct list_head list = LIST_HEAD_INIT(list);
+
+	plan_tests(1);
+
+	list_add(&list, &c1.list);
+	list_add_tail(list_check(&list, "Bad list!"), &c2.list);
+	list_del_from(list_check(&list, "Bad list!"),
+		      list_check_node(&c2.list, "Bad node!"));
+	list_del_from(list_check(&list, "Bad list!"),
+		      list_check_node(&c1.list, "Bad node!"));
+	ok1(list_empty(list_check(&list, "Bad emptied list")));
+
+	return exit_status();
+}
diff --git a/ccan/list/test/run-list_del_from-assert.c b/ccan/list/test/run-list_del_from-assert.c
new file mode 100644
index 0000000..9404b71
--- /dev/null
+++ b/ccan/list/test/run-list_del_from-assert.c
@@ -0,0 +1,36 @@
+#define CCAN_LIST_DEBUG 1
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <signal.h>
+
+int main(void)
+{
+	struct list_head list1, list2;
+	struct list_node n1, n2, n3;
+	pid_t child;
+	int status;
+
+	plan_tests(1);
+	list_head_init(&list1);
+	list_head_init(&list2);
+	list_add(&list1, &n1);
+	list_add(&list2, &n2);
+	list_add_tail(&list2, &n3);
+
+	child = fork();
+	if (child) {
+		wait(&status);
+	} else {
+		/* This should abort. */
+		list_del_from(&list1, &n3);
+		exit(0);
+	}
+
+	ok1(WIFSIGNALED(status) && WTERMSIG(status) == SIGABRT);
+	list_del_from(&list2, &n3);
+	return exit_status();
+}
diff --git a/ccan/list/test/run-list_prev-list_next.c b/ccan/list/test/run-list_prev-list_next.c
new file mode 100644
index 0000000..cc61e03
--- /dev/null
+++ b/ccan/list/test/run-list_prev-list_next.c
@@ -0,0 +1,65 @@
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include "helper.h"
+
+struct parent {
+	const char *name;
+	unsigned int num_children;
+	struct list_head children;
+};
+
+struct child {
+	const char *name;
+	struct list_node list;
+};
+
+int main(void)
+{
+	struct parent parent;
+	struct child c1, c2, c3;
+	const struct parent *p;
+	const struct child *c;
+
+	plan_tests(20);
+	parent.num_children = 0;
+	list_head_init(&parent.children);
+
+	c1.name = "c1";
+	list_add(&parent.children, &c1.list);
+
+	ok1(list_next(&parent.children, &c1, list) == NULL);
+	ok1(list_prev(&parent.children, &c1, list) == NULL);
+
+	c2.name = "c2";
+	list_add_tail(&parent.children, &c2.list);
+
+	ok1(list_next(&parent.children, &c1, list) == &c2);
+	ok1(list_prev(&parent.children, &c1, list) == NULL);
+	ok1(list_next(&parent.children, &c2, list) == NULL);
+	ok1(list_prev(&parent.children, &c2, list) == &c1);
+
+	c3.name = "c3";
+	list_add_tail(&parent.children, &c3.list);
+
+	ok1(list_next(&parent.children, &c1, list) == &c2);
+	ok1(list_prev(&parent.children, &c1, list) == NULL);
+	ok1(list_next(&parent.children, &c2, list) == &c3);
+	ok1(list_prev(&parent.children, &c2, list) == &c1);
+	ok1(list_next(&parent.children, &c3, list) == NULL);
+	ok1(list_prev(&parent.children, &c3, list) == &c2);
+
+	/* Const variants */
+	p = &parent;
+	c = &c2;
+	ok1(list_next(&p->children, &c1, list) == &c2);
+	ok1(list_prev(&p->children, &c1, list) == NULL);
+	ok1(list_next(&p->children, c, list) == &c3);
+	ok1(list_prev(&p->children, c, list) == &c1);
+	ok1(list_next(&parent.children, c, list) == &c3);
+	ok1(list_prev(&parent.children, c, list) == &c1);
+	ok1(list_next(&p->children, &c3, list) == NULL);
+	ok1(list_prev(&p->children, &c3, list) == &c2);
+
+	return exit_status();
+}
diff --git a/ccan/list/test/run-prepend_list.c b/ccan/list/test/run-prepend_list.c
new file mode 100644
index 0000000..fecd419
--- /dev/null
+++ b/ccan/list/test/run-prepend_list.c
@@ -0,0 +1,111 @@
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include <stdarg.h>
+
+static bool list_expect(struct list_head *h, ...)
+{
+	va_list ap;
+	struct list_node *n = &h->n, *expected;
+
+	va_start(ap, h);
+	while ((expected = va_arg(ap, struct list_node *)) != NULL) {
+		n = n->next;
+		if (n != expected)
+			return false;
+	}
+	return (n->next == &h->n);
+}
+
+int main(void)
+{
+	struct list_head h1, h2;
+	struct list_node n[4];
+
+	plan_tests(40);
+
+	list_head_init(&h1);
+	list_head_init(&h2);
+
+	/* Append an empty list to an empty list. */
+	list_append_list(&h1, &h2);
+	ok1(list_empty(&h1));
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+
+	/* Prepend an empty list to an empty list. */
+	list_prepend_list(&h1, &h2);
+	ok1(list_empty(&h1));
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+
+	/* Append an empty list to a non-empty list */
+	list_add(&h1, &n[0]);
+	list_append_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[0], NULL));
+
+	/* Prepend an empty list to a non-empty list */
+	list_prepend_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[0], NULL));
+
+	/* Append a non-empty list to an empty list. */
+	list_append_list(&h2, &h1);
+	ok1(list_empty(&h1));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h2, &n[0], NULL));
+
+	/* Prepend a non-empty list to an empty list. */
+	list_prepend_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[0], NULL));
+
+	/* Prepend a non-empty list to non-empty list. */
+	list_add(&h2, &n[1]);
+	list_prepend_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[1], &n[0], NULL));
+
+	/* Append a non-empty list to non-empty list. */
+	list_add(&h2, &n[2]);
+	list_append_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[1], &n[0], &n[2], NULL));
+
+	/* Prepend a 2-entry list to a 2-entry list. */
+	list_del_from(&h1, &n[2]);
+	list_add(&h2, &n[2]);
+	list_add_tail(&h2, &n[3]);
+	list_prepend_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[2], &n[3], &n[1], &n[0], NULL));
+
+	/* Append a 2-entry list to a 2-entry list. */
+	list_del_from(&h1, &n[2]);
+	list_del_from(&h1, &n[3]);
+	list_add(&h2, &n[2]);
+	list_add_tail(&h2, &n[3]);
+	list_append_list(&h1, &h2);
+	ok1(list_empty(&h2));
+	ok1(list_check(&h1, NULL));
+	ok1(list_check(&h2, NULL));
+	ok1(list_expect(&h1, &n[1], &n[0], &n[2], &n[3], NULL));
+
+	return exit_status();
+}
diff --git a/ccan/list/test/run-single-eval.c b/ccan/list/test/run-single-eval.c
new file mode 100644
index 0000000..db0bffd
--- /dev/null
+++ b/ccan/list/test/run-single-eval.c
@@ -0,0 +1,168 @@
+/* Make sure macros only evaluate their args once. */
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+
+struct parent {
+	const char *name;
+	struct list_head children;
+	unsigned int num_children;
+	int eval_count;
+};
+
+struct child {
+	const char *name;
+	struct list_node list;
+};
+
+static LIST_HEAD(static_list);
+
+#define ref(obj, counter) ((counter)++, (obj))
+
+int main(void)
+{
+	struct parent parent;
+	struct child c1, c2, c3, *c, *n;
+	unsigned int i;
+	unsigned int static_count = 0, parent_count = 0, list_count = 0,
+		node_count = 0;
+	struct list_head list = LIST_HEAD_INIT(list);
+
+	plan_tests(74);
+	/* Test LIST_HEAD, LIST_HEAD_INIT, list_empty and check_list */
+	ok1(list_empty(ref(&static_list, static_count)));
+	ok1(static_count == 1);
+	ok1(list_check(ref(&static_list, static_count), NULL));
+	ok1(static_count == 2);
+	ok1(list_empty(ref(&list, list_count)));
+	ok1(list_count == 1);
+	ok1(list_check(ref(&list, list_count), NULL));
+	ok1(list_count == 2);
+
+	parent.num_children = 0;
+	list_head_init(ref(&parent.children, parent_count));
+	ok1(parent_count == 1);
+	/* Test list_head_init */
+	ok1(list_empty(ref(&parent.children, parent_count)));
+	ok1(parent_count == 2);
+	ok1(list_check(ref(&parent.children, parent_count), NULL));
+	ok1(parent_count == 3);
+
+	c2.name = "c2";
+	list_add(ref(&parent.children, parent_count), &c2.list);
+	ok1(parent_count == 4);
+	/* Test list_add and !list_empty. */
+	ok1(!list_empty(ref(&parent.children, parent_count)));
+	ok1(parent_count == 5);
+	ok1(c2.list.next == &parent.children.n);
+	ok1(c2.list.prev == &parent.children.n);
+	ok1(parent.children.n.next == &c2.list);
+	ok1(parent.children.n.prev == &c2.list);
+	/* Test list_check */
+	ok1(list_check(ref(&parent.children, parent_count), NULL));
+	ok1(parent_count == 6);
+
+	c1.name = "c1";
+	list_add(ref(&parent.children, parent_count), &c1.list);
+	ok1(parent_count == 7);
+	/* Test list_add and !list_empty. */
+	ok1(!list_empty(ref(&parent.children, parent_count)));
+	ok1(parent_count == 8);
+	ok1(c2.list.next == &parent.children.n);
+	ok1(c2.list.prev == &c1.list);
+	ok1(parent.children.n.next == &c1.list);
+	ok1(parent.children.n.prev == &c2.list);
+	ok1(c1.list.next == &c2.list);
+	ok1(c1.list.prev == &parent.children.n);
+	/* Test list_check */
+	ok1(list_check(ref(&parent.children, parent_count), NULL));
+	ok1(parent_count == 9);
+
+	c3.name = "c3";
+	list_add_tail(ref(&parent.children, parent_count), &c3.list);
+	ok1(parent_count == 10);
+	/* Test list_add_tail and !list_empty. */
+	ok1(!list_empty(ref(&parent.children, parent_count)));
+	ok1(parent_count == 11);
+	ok1(parent.children.n.next == &c1.list);
+	ok1(parent.children.n.prev == &c3.list);
+	ok1(c1.list.next == &c2.list);
+	ok1(c1.list.prev == &parent.children.n);
+	ok1(c2.list.next == &c3.list);
+	ok1(c2.list.prev == &c1.list);
+	ok1(c3.list.next == &parent.children.n);
+	ok1(c3.list.prev == &c2.list);
+	/* Test list_check */
+	ok1(list_check(ref(&parent.children, parent_count), NULL));
+	ok1(parent_count == 12);
+
+	/* Test list_check_node */
+	ok1(list_check_node(&c1.list, NULL));
+	ok1(list_check_node(&c2.list, NULL));
+	ok1(list_check_node(&c3.list, NULL));
+
+	/* Test list_top */
+	ok1(list_top(ref(&parent.children, parent_count), struct child, list) == &c1);
+	ok1(parent_count == 13);
+
+	/* Test list_tail */
+	ok1(list_tail(ref(&parent.children, parent_count), struct child, list) == &c3);
+	ok1(parent_count == 14);
+
+	/* Test list_for_each. */
+	i = 0;
+	list_for_each(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			break;
+		case 1:
+			ok1(c == &c2);
+			break;
+		case 2:
+			ok1(c == &c3);
+			break;
+		}
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+
+	/* Test list_for_each_safe, list_del and list_del_from. */
+	i = 0;
+	list_for_each_safe(&parent.children, c, n, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			list_del(ref(&c->list, node_count));
+			ok1(node_count == 1);
+			break;
+		case 1:
+			ok1(c == &c2);
+			list_del_from(ref(&parent.children, parent_count),
+				      ref(&c->list, node_count));
+			ok1(node_count == 2);
+			break;
+		case 2:
+			ok1(c == &c3);
+			list_del_from(ref(&parent.children, parent_count),
+				      ref(&c->list, node_count));
+			ok1(node_count == 3);
+			break;
+		}
+		ok1(list_check(ref(&parent.children, parent_count), NULL));
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+	ok1(parent_count == 19);
+	ok1(list_empty(ref(&parent.children, parent_count)));
+	ok1(parent_count == 20);
+
+	/* Test list_top/list_tail on empty list. */
+	ok1(list_top(ref(&parent.children, parent_count), struct child, list) == NULL);
+	ok1(parent_count == 21);
+	ok1(list_tail(ref(&parent.children, parent_count), struct child, list) == NULL);
+	ok1(parent_count == 22);
+	return exit_status();
+}
diff --git a/ccan/list/test/run-with-debug.c b/ccan/list/test/run-with-debug.c
new file mode 100644
index 0000000..d090242
--- /dev/null
+++ b/ccan/list/test/run-with-debug.c
@@ -0,0 +1,3 @@
+/* Just like run.c, but with all debug checks enabled. */
+#define CCAN_LIST_DEBUG 1
+#include <ccan/list/test/run.c>
diff --git a/ccan/list/test/run.c b/ccan/list/test/run.c
new file mode 100644
index 0000000..5787e45
--- /dev/null
+++ b/ccan/list/test/run.c
@@ -0,0 +1,305 @@
+#include <ccan/list/list.h>
+#include <ccan/tap/tap.h>
+#include <ccan/list/list.c>
+#include "helper.h"
+
+struct parent {
+	const char *name;
+	struct list_head children;
+	unsigned int num_children;
+};
+
+struct child {
+	const char *name;
+	struct list_node list;
+};
+
+static LIST_HEAD(static_list);
+
+int main(void)
+{
+	struct parent parent;
+	struct child c1, c2, c3, x1, *c, *n;
+	unsigned int i;
+	struct list_head list = LIST_HEAD_INIT(list);
+	opaque_t *q, *nq;
+	struct list_head opaque_list = LIST_HEAD_INIT(opaque_list);
+	LIST_HEAD(rev);
+
+	plan_tests(92);
+	/* Test LIST_HEAD, LIST_HEAD_INIT, list_empty and check_list */
+	ok1(list_empty(&static_list));
+	ok1(list_check(&static_list, NULL));
+	ok1(list_empty(&list));
+	ok1(list_check(&list, NULL));
+
+	parent.num_children = 0;
+	list_head_init(&parent.children);
+	/* Test list_head_init */
+	ok1(list_empty(&parent.children));
+	ok1(list_check(&parent.children, NULL));
+
+	c2.name = "c2";
+	list_add(&parent.children, &c2.list);
+	/* Test list_add and !list_empty. */
+	ok1(!list_empty(&parent.children));
+	ok1(c2.list.next == &parent.children.n);
+	ok1(c2.list.prev == &parent.children.n);
+	ok1(parent.children.n.next == &c2.list);
+	ok1(parent.children.n.prev == &c2.list);
+	/* Test list_check */
+	ok1(list_check(&parent.children, NULL));
+
+	c1.name = "c1";
+	list_add(&parent.children, &c1.list);
+	/* Test list_add and !list_empty. */
+	ok1(!list_empty(&parent.children));
+	ok1(c2.list.next == &parent.children.n);
+	ok1(c2.list.prev == &c1.list);
+	ok1(parent.children.n.next == &c1.list);
+	ok1(parent.children.n.prev == &c2.list);
+	ok1(c1.list.next == &c2.list);
+	ok1(c1.list.prev == &parent.children.n);
+	/* Test list_check */
+	ok1(list_check(&parent.children, NULL));
+
+	c3.name = "c3";
+	list_add_tail(&parent.children, &c3.list);
+	/* Test list_add_tail and !list_empty. */
+	ok1(!list_empty(&parent.children));
+	ok1(parent.children.n.next == &c1.list);
+	ok1(parent.children.n.prev == &c3.list);
+	ok1(c1.list.next == &c2.list);
+	ok1(c1.list.prev == &parent.children.n);
+	ok1(c2.list.next == &c3.list);
+	ok1(c2.list.prev == &c1.list);
+	ok1(c3.list.next == &parent.children.n);
+	ok1(c3.list.prev == &c2.list);
+	/* Test list_check */
+	ok1(list_check(&parent.children, NULL));
+
+	/* Test list_check_node */
+	ok1(list_check_node(&c1.list, NULL));
+	ok1(list_check_node(&c2.list, NULL));
+	ok1(list_check_node(&c3.list, NULL));
+
+	/* Test list_top */
+	ok1(list_top(&parent.children, struct child, list) == &c1);
+
+	/* Test list_pop */
+	ok1(list_pop(&parent.children, struct child, list) == &c1);
+	ok1(list_top(&parent.children, struct child, list) == &c2);
+	list_add(&parent.children, &c1.list);
+
+	/* Test list_tail */
+	ok1(list_tail(&parent.children, struct child, list) == &c3);
+
+	/* Test list_for_each. */
+	i = 0;
+	list_for_each(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			break;
+		case 1:
+			ok1(c == &c2);
+			break;
+		case 2:
+			ok1(c == &c3);
+			break;
+		}
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+
+	/* Test list_for_each_rev. */
+	i = 0;
+	list_for_each_rev(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c3);
+			break;
+		case 1:
+			ok1(c == &c2);
+			break;
+		case 2:
+			ok1(c == &c1);
+			break;
+		}
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+
+	/* Test list_for_each_safe, list_del and list_del_from. */
+	i = 0;
+	list_for_each_safe(&parent.children, c, n, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);	
+			list_del(&c->list);
+			break;
+		case 1:
+			ok1(c == &c2);
+			list_del_from(&parent.children, &c->list);
+			break;
+		case 2:
+			ok1(c == &c3);
+			list_del_from(&parent.children, &c->list);
+			break;
+		}
+
+		/* prepare for list_for_each_rev_safe test */
+		list_add(&rev, &c->list);
+
+		ok1(list_check(&parent.children, NULL));
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+	ok1(list_empty(&parent.children));
+
+	/* Test list_for_each_rev_safe, list_del and list_del_from. */
+	i = 0;
+	list_for_each_rev_safe(&rev, c, n, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			list_del(&c->list);
+			break;
+		case 1:
+			ok1(c == &c2);
+			list_del_from(&rev, &c->list);
+			break;
+		case 2:
+			ok1(c == &c3);
+			list_del_from(&rev, &c->list);
+			break;
+		}
+		ok1(list_check(&rev, NULL));
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+	ok1(list_empty(&rev));
+
+	/* Test list_node_init: safe to list_del after this. */
+	list_node_init(&c->list);
+	list_del(&c->list);
+
+	/* Test list_del_init */
+	list_add(&parent.children, &c->list);
+	ok1(!list_empty(&parent.children));
+	list_del_init(&c->list);
+	ok1(list_empty(&parent.children));
+	/* We can call this as many times as we like. */
+	list_del_init(&c->list);
+	list_del_init(&c->list);
+
+	/* Test list_for_each_off. */
+	list_add_tail(&opaque_list,
+		      (struct list_node *)create_opaque_blob());
+	list_add_tail(&opaque_list,
+		      (struct list_node *)create_opaque_blob());
+	list_add_tail(&opaque_list,
+		      (struct list_node *)create_opaque_blob());
+
+	i = 0;
+
+	list_for_each_off(&opaque_list, q, 0) {
+	  i++;
+	  ok1(if_blobs_know_the_secret(q));
+	}
+	ok1(i == 3);
+
+	/* Test list_for_each_safe_off, list_del_off and list_del_from_off. */
+	i = 0;
+	list_for_each_safe_off(&opaque_list, q, nq, 0) {
+		switch (i++) {
+		case 0:
+			ok1(if_blobs_know_the_secret(q));
+			list_del_off(q, 0);
+			destroy_opaque_blob(q);
+			break;
+		case 1:
+			ok1(if_blobs_know_the_secret(q));
+			list_del_from_off(&opaque_list, q, 0);
+			destroy_opaque_blob(q);
+			break;
+		case 2:
+			ok1(c == &c3);
+			list_del_from_off(&opaque_list, q, 0);
+			destroy_opaque_blob(q);
+			break;
+		}
+		ok1(list_check(&opaque_list, NULL));
+		if (i > 2)
+			break;
+	}
+	ok1(i == 3);
+	ok1(list_empty(&opaque_list));
+
+	/* Test list_top/list_tail/list_pop on empty list. */
+	ok1(list_top(&parent.children, struct child, list) == NULL);
+	ok1(list_tail(&parent.children, struct child, list) == NULL);
+	ok1(list_pop(&parent.children, struct child, list) == NULL);
+
+	/* Test list_add_before and list_add_after */
+	list_add(&parent.children, &c1.list);
+	list_add_after(&parent.children, &c1.list, &c2.list);
+	ok1(list_check(&parent.children, "list_add_after"));
+
+	i = 0;
+	list_for_each(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			break;
+		case 1:
+			ok1(c == &c2);
+			break;
+		}
+	}
+	ok1(i == 2);
+
+	list_add_before(&parent.children, &c2.list, &c3.list);
+	ok1(list_check(&parent.children, "list_add_before"));
+
+	i = 0;
+	list_for_each(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			break;
+		case 1:
+			ok1(c == &c3);
+			break;
+		case 2:
+			ok1(c == &c2);
+			break;
+		}
+	}
+	ok1(i == 3);
+
+	/* test list_swap */
+	list_swap(&c3.list, &x1.list);
+	ok1(list_check(&parent.children, "list_swap"));
+	i = 0;
+	list_for_each(&parent.children, c, list) {
+		switch (i++) {
+		case 0:
+			ok1(c == &c1);
+			break;
+		case 1:
+			ok1(c == &x1);
+			break;
+		case 2:
+			ok1(c == &c2);
+			break;
+		}
+	}
+	ok1(i == 3);
+
+	return exit_status();
+}