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systemd/set.h
2010-01-26 04:18:44 +01:00

47 lines
1.4 KiB
C

/*-*- Mode: C; c-basic-offset: 8 -*-*/
#ifndef foosethfoo
#define foosethfoo
/* Pretty straightforward set implementation. Internally based on the
* hashmap. That means that as a minor optimization a NULL set
* object will be treated as empty set for all read
* operations. That way it is not necessary to instantiate an object
* for each set use. */
#include "hashmap.h"
typedef struct Set Set;
Set *set_new(hash_func_t hash_func, compare_func_t compare_func);
void set_free(Set* s);
Set* set_copy(Set *s);
int set_ensure_allocated(Set **s, hash_func_t hash_func, compare_func_t compare_func);
int set_put(Set *s, void *value);
int set_replace(Set *s, void *value);
void *set_get(Set *s, void *value);
void *set_remove(Set *s, void *value);
int set_merge(Set *s, Set *other);
unsigned set_size(Set *s);
bool set_isempty(Set *s);
void *set_iterate(Set *s, Iterator *i);
void *set_iterate_backwards(Set *s, Iterator *i);
void *set_iterate_skip(Set *s, void *value, Iterator *i);
void set_clear(Set *s);
void *set_steal_first(Set *s);
void* set_first(Set *s);
void* set_last(Set *s);
#define SET_FOREACH(e, s, i) \
for ((i) = ITERATOR_FIRST, (e) = set_iterate((s), &(i)); (e); (e) = set_iterate((s), &(i)))
#define SET_FOREACH_BACKWARDS(e, s, i) \
for ((i) = ITERATOR_LAST, (e) = set_iterate_backwards((s), &(i)); (e); (e) = set_iterate_backwards((s), &(i)))
#endif