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src/llist.c: Add llist_next_filter()

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This convenience function can be used to return the successor of a list
item if it is matched by a filter callback and return NULL otherwise.

We will use this for an improved version of the LLIST_FIND_FOREACH macro
that can be used whenever results are known to be continuous.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
This commit is contained in:
Lukas Fleischer
2011-10-04 09:34:06 +02:00
parent a0afb7ded2
commit 1fa9564916
3 changed files with 18 additions and 0 deletions
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src/llist.h
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@@ -65,6 +65,7 @@ void llist_free_inner (llist_t *, llist_fn_free_t);
llist_item_t *llist_first (llist_t *);
llist_item_t *llist_nth (llist_t *, int);
llist_item_t *llist_next (llist_item_t *);
llist_item_t *llist_next_filter (llist_item_t *, long, llist_fn_match_t);
llist_item_t *llist_find_first (llist_t *, long, llist_fn_match_t);
llist_item_t *llist_find_next (llist_item_t *, long, llist_fn_match_t);
llist_item_t *llist_find_nth (llist_t *, int, long, llist_fn_match_t);
@@ -72,6 +73,8 @@ llist_item_t *llist_find_nth (llist_t *, int, long, llist_fn_match_t);
#define LLIST_FIRST(l) llist_first(l)
#define LLIST_NTH(l, n) llist_nth(l, n)
#define LLIST_NEXT(i) llist_next(i)
#define LLIST_NEXT_FILTER(i, data, fn_match) \
llist_next_filter(i, data, (llist_fn_match_t)fn_match)
#define LLIST_FIND_FIRST(l, data, fn_match) \
llist_find_first(l, data, (llist_fn_match_t)fn_match)
#define LLIST_FIND_NEXT(i, data, fn_match) \