mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-15 11:07:24 +07:00
91 lines
4.7 KiB
C
91 lines
4.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
|
|
|
|
#ifndef foolisthfoo
|
|
#define foolisthfoo
|
|
|
|
/* The head of the linked list. Use this in the structure that shall
|
|
* contain the head of the linked list */
|
|
#define LIST_HEAD(t,name) \
|
|
t *name
|
|
|
|
/* The pointers in the linked list's items. Use this in the item structure */
|
|
#define LIST_FIELDS(t) \
|
|
t *next, *prev
|
|
|
|
/* Initialize the list's head */
|
|
#define LIST_HEAD_INIT(t,item) \
|
|
do { \
|
|
(item) = (t*) NULL; } \
|
|
while(false)
|
|
|
|
/* Initialize a list item */
|
|
#define LIST_INIT(t,item) \
|
|
do { \
|
|
t *_item = (item); \
|
|
assert(_item); \
|
|
_item->prev = _item->next = NULL; \
|
|
} while(false)
|
|
|
|
/* Prepend an item to the list */
|
|
#define LIST_PREPEND(t,head,item) \
|
|
do { \
|
|
t **_head = &(head), *_item = (item); \
|
|
assert(_item); \
|
|
if ((_item->next = *_head)) \
|
|
_item->next->prev = _item; \
|
|
_item->prev = NULL; \
|
|
*_head = _item; \
|
|
} while(false)
|
|
|
|
/* Remove an item from the list */
|
|
#define LIST_REMOVE(t,head,item) \
|
|
do { \
|
|
t **_head = &(head), *_item = (item); \
|
|
assert(_item); \
|
|
if (_item->next) \
|
|
_item->next->prev = _item->prev; \
|
|
if (_item->prev) \
|
|
_item->prev->next = _item->next; \
|
|
else { \
|
|
assert(*_head == _item); \
|
|
*_head = _item->next; \
|
|
} \
|
|
_item->next = _item->prev = NULL; \
|
|
} while(false)
|
|
|
|
/* Find the head of the list */
|
|
#define LIST_FIND_HEAD(t,item,head) \
|
|
do { \
|
|
t **_head = (head), *_item = (item); \
|
|
*_head = _item; \
|
|
assert(_head); \
|
|
while ((*_head)->prev) \
|
|
*_head = (*_head)->prev; \
|
|
} while (false)
|
|
|
|
/* Insert an item after another one (a = where, b = what) */
|
|
#define LIST_INSERT_AFTER(t,head,a,b) \
|
|
do { \
|
|
t **_head = &(head), *_a = (a), *_b = (b); \
|
|
assert(_b); \
|
|
if (!_a) { \
|
|
if ((_b->next = *_head)) \
|
|
_b->next->prev = _b; \
|
|
_b->prev = NULL; \
|
|
*_head = _b; \
|
|
} else { \
|
|
if ((_b->next = _a->next)) \
|
|
_b->next->prev = _b; \
|
|
_b->prev = _a; \
|
|
_a->next = _b; \
|
|
} \
|
|
} while(false)
|
|
|
|
#define LIST_FOREACH(i,head) \
|
|
for (i = (head); i; i = i->next)
|
|
|
|
#define LIST_FOREACH_SAFE(i,n,head) \
|
|
for (i = (head); i && ((n = i->next), 1); i = n)
|
|
|
|
#endif
|