wine/list.h: Add list_count function. Make some parameters const.

This commit is contained in:
Alexandre Julliard 2007-01-22 12:16:17 +01:00
parent 4ae5b9fd33
commit 4dc61069a6
1 changed files with 14 additions and 5 deletions

View File

@ -100,7 +100,7 @@ inline static void list_remove( struct list *elem )
} }
/* get the next element */ /* get the next element */
inline static struct list *list_next( struct list *list, struct list *elem ) inline static struct list *list_next( const struct list *list, const struct list *elem )
{ {
struct list *ret = elem->next; struct list *ret = elem->next;
if (elem->next == list) ret = NULL; if (elem->next == list) ret = NULL;
@ -108,7 +108,7 @@ inline static struct list *list_next( struct list *list, struct list *elem )
} }
/* get the previous element */ /* get the previous element */
inline static struct list *list_prev( struct list *list, struct list *elem ) inline static struct list *list_prev( const struct list *list, const struct list *elem )
{ {
struct list *ret = elem->prev; struct list *ret = elem->prev;
if (elem->prev == list) ret = NULL; if (elem->prev == list) ret = NULL;
@ -116,19 +116,19 @@ inline static struct list *list_prev( struct list *list, struct list *elem )
} }
/* get the first element */ /* get the first element */
inline static struct list *list_head( struct list *list ) inline static struct list *list_head( const struct list *list )
{ {
return list_next( list, list ); return list_next( list, list );
} }
/* get the last element */ /* get the last element */
inline static struct list *list_tail( struct list *list ) inline static struct list *list_tail( const struct list *list )
{ {
return list_prev( list, list ); return list_prev( list, list );
} }
/* check if a list is empty */ /* check if a list is empty */
inline static int list_empty( struct list *list ) inline static int list_empty( const struct list *list )
{ {
return list->next == list; return list->next == list;
} }
@ -139,6 +139,15 @@ inline static void list_init( struct list *list )
list->next = list->prev = list; list->next = list->prev = list;
} }
/* count the elements of a list */
inline static unsigned int list_count( const struct list *list )
{
unsigned count = 0;
const struct list *ptr;
for (ptr = list->next; ptr != list; ptr = ptr->next) count++;
return count;
}
/* move all elements from src to the tail of dst */ /* move all elements from src to the tail of dst */
inline static void list_move_tail( struct list *dst, struct list *src ) inline static void list_move_tail( struct list *dst, struct list *src )
{ {