list.c File Reference

#include "sys/list.h"
#include "string.h"
#include "stdint.h"
#include "panic.h"

Functions
struct list_head *	list_init_head (struct list_head *head)
	Initializes head as an empty list.
struct list_node *	list_init_node (struct list_node *node)
	Initializes node.
bool	list_is_empty (const struct list_head *head)
struct list_node *	list_insert_after (struct list_node *after, struct list_node *node)
	Inserts node after after in the list of after.
struct list_node *	list_insert_before (struct list_node *before, struct list_node *node)
	Inserts node before before in the list of before.
struct list_node *	list_append (struct list_head *head, struct list_node *node)
	Inserts node at the end of head's list (aka stack push).
struct list_head *	list_extend (struct list_head *head1, struct list_head *head2)
	Merges head2 unto head1 at the end of head1 and returns head1.
struct list_node *	list_first (struct list_head *head)
struct list_node *	list_last (struct list_head *head)
struct list_node *	list_remove (struct list_node *node)
	Removes node from head's list.
struct list_node *	list_pop_first (struct list_head *head)
	Removes the first node of head's list (aka deque with respect to list_append).
struct list_node *	list_pop_last (struct list_head *head)
	Removes the last node of head's list (aka stack pop with respect to list_append).
struct list_node *	list_next (struct list_head *head, struct list_node *node)
struct list_node *	list_prev (struct list_head *head, struct list_node *node)
size_t	list_length (struct list_head *head)

Function Documentation

list_append()

struct list_node * list_append	(	struct list_head *	head,
		struct list_node *	node
	)

Inserts node at the end of head's list (aka stack push).

Returns

node

list_extend()

struct list_head * list_extend	(	struct list_head *	head1,
		struct list_head *	head2
	)

Merges head2 unto head1 at the end of head1 and returns head1.

Warning

This will modify head2, so head2 should be discarded or reinitialized afterwards.

Returns

head1

list_first()

struct list_node * list_first

(

struct list_head *

head

)

Returns

The first node of head's list, otherwise NULL.

list_init_head()

struct list_head * list_init_head

(

struct list_head *

head

)

Initializes head as an empty list.

list_init_node()

struct list_node * list_init_node

(

struct list_node *

node

)

Initializes node.

list_insert_after()

struct list_node * list_insert_after	(	struct list_node *	after,
		struct list_node *	node
	)

Inserts node after after in the list of after.

Returns

node

list_insert_before()

struct list_node * list_insert_before	(	struct list_node *	before,
		struct list_node *	node
	)

Inserts node before before in the list of before.

Returns

node

list_is_empty()

bool list_is_empty

(

const struct list_head *

head

)

Returns

true if head's list is empty, otherwise false.

list_last()

struct list_node * list_last

(

struct list_head *

head

)

Returns

The last node of head's list, otherwise NULL.

list_length()

size_t list_length

(

struct list_head *

head

)

Returns

The length of head's list.

list_next()

struct list_node * list_next	(	struct list_head *	head,
		struct list_node *	node
	)

Returns

The node right after node in the head's list, otherwise NULL.

list_pop_first()

struct list_node * list_pop_first

(

struct list_head *

head

)

Removes the first node of head's list (aka deque with respect to list_append).

Note

The node returned is not modified.

Returns

The removed node if the list of head is not empty, otherwise NULL.

list_pop_last()

struct list_node * list_pop_last

(

struct list_head *

head

)

Removes the last node of head's list (aka stack pop with respect to list_append).

Note

The node returned is not modified.

Returns

The removed node if the list of head is not empty, otherwise NULL.

list_prev()

struct list_node * list_prev	(	struct list_head *	head,
		struct list_node *	node
	)

Returns

The node right before node in the head's list, otherwise NULL.

list_remove()

struct list_node * list_remove

(

struct list_node *

node

)

Removes node from head's list.

Note

node is not modified.

Warning

node must already be in a list, otherwise there might be unintended consequences.

Returns

node