/* Abstract ordered set data type.
- Copyright (C) 2006 Free Software Foundation, Inc.
+ Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2006.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef _GL_OSET_H
#define _GL_OSET_H
Operation ARRAY TREE
gl_oset_size O(1) O(1)
- gl_oset_add
- gl_oset_remove
- gl_oset_search
+ gl_oset_add O(n) O(log n)
+ gl_oset_remove O(n) O(log n)
+ gl_oset_search O(log n) O(log n)
+ gl_oset_search_atleast O(log n) O(log n)
gl_oset_iterator O(1) O(log n)
gl_oset_iterator_next O(1) O(log n)
*/
NULL denotes pointer comparison. */
typedef int (*gl_setelement_compar_fn) (const void *elt1, const void *elt2);
+/* Type of function used to dispose an element once it's removed from a set.
+ NULL denotes a no-op. */
+typedef void (*gl_setelement_dispose_fn) (const void *elt);
+
+/* Type of function used to compare an element with a threshold.
+ Return true if the element is greater or equal than the threshold. */
+typedef bool (*gl_setelement_threshold_fn) (const void *elt, const void *threshold);
+
struct gl_oset_impl;
/* Type representing an entire ordered set. */
typedef struct gl_oset_impl * gl_oset_t;
/* Create an empty set.
IMPLEMENTATION is one of GL_ARRAY_OSET, GL_AVLTREE_OSET, GL_RBTREE_OSET.
- COMPAR_FN is an element comparison function or NULL. */
+ COMPAR_FN is an element comparison function or NULL.
+ DISPOSE_FN is an element disposal function or NULL. */
+#if 0 /* declared in gl_xoset.h */
extern gl_oset_t gl_oset_create_empty (gl_oset_implementation_t implementation,
- gl_setelement_compar_fn compar_fn);
+ gl_setelement_compar_fn compar_fn,
+ gl_setelement_dispose_fn dispose_fn);
+#endif
+/* Likewise. Return NULL upon out-of-memory. */
+extern gl_oset_t gl_oset_nx_create_empty (gl_oset_implementation_t implementation,
+ gl_setelement_compar_fn compar_fn,
+ gl_setelement_dispose_fn dispose_fn);
/* Return the current number of elements in an ordered set. */
extern size_t gl_oset_size (gl_oset_t set);
Return true if found, or false if not present in the set. */
extern bool gl_oset_search (gl_oset_t set, const void *elt);
+/* Search the least element in the ordered set that compares greater or equal
+ to the given THRESHOLD. The representation of the THRESHOLD is defined
+ by the THRESHOLD_FN.
+ Return true and store the found element in *ELTP if found, otherwise return
+ false. */
+extern bool gl_oset_search_atleast (gl_oset_t set,
+ gl_setelement_threshold_fn threshold_fn,
+ const void *threshold,
+ const void **eltp);
+
/* Add an element to an ordered set.
- Return true if it was not already in the set and added. */
+ Return true if it was not already in the set and added, false otherwise. */
+#if 0 /* declared in gl_xoset.h */
extern bool gl_oset_add (gl_oset_t set, const void *elt);
+#endif
+/* Likewise. Return -1 upon out-of-memory. */
+extern int gl_oset_nx_add (gl_oset_t set, const void *elt)
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
+ __attribute__ ((__warn_unused_result__))
+#endif
+ ;
/* Remove an element from an ordered set.
Return true if it was found and removed. */
/* If there is a next element, store the next element in *ELTP, advance the
iterator and return true. Otherwise, return false. */
extern bool gl_oset_iterator_next (gl_oset_iterator_t *iterator,
- const void **eltp);
+ const void **eltp);
/* Free an iterator. */
extern void gl_oset_iterator_free (gl_oset_iterator_t *iterator);
struct gl_oset_implementation
{
- // gl_oset_t functions.
- gl_oset_t (*create_empty) (gl_oset_implementation_t implementation,
- gl_setelement_compar_fn compar_fn);
+ /* gl_oset_t functions. */
+ gl_oset_t (*nx_create_empty) (gl_oset_implementation_t implementation,
+ gl_setelement_compar_fn compar_fn,
+ gl_setelement_dispose_fn dispose_fn);
size_t (*size) (gl_oset_t set);
bool (*search) (gl_oset_t set, const void *elt);
- bool (*add) (gl_oset_t set, const void *elt);
- bool (*remove) (gl_oset_t set, const void *elt);
+ bool (*search_atleast) (gl_oset_t set,
+ gl_setelement_threshold_fn threshold_fn,
+ const void *threshold, const void **eltp);
+ int (*nx_add) (gl_oset_t set, const void *elt);
+ bool (*remove_elt) (gl_oset_t set, const void *elt);
void (*oset_free) (gl_oset_t set);
- // gl_oset_iterator_t functions.
+ /* gl_oset_iterator_t functions. */
gl_oset_iterator_t (*iterator) (gl_oset_t set);
bool (*iterator_next) (gl_oset_iterator_t *iterator, const void **eltp);
void (*iterator_free) (gl_oset_iterator_t *iterator);
{
const struct gl_oset_implementation *vtable;
gl_setelement_compar_fn compar_fn;
+ gl_setelement_dispose_fn dispose_fn;
};
#if HAVE_INLINE
struct gl_oset_implementation.
Use #define to avoid a warning because of extern vs. static. */
-# define gl_oset_create_empty gl_oset_create_empty_inline
+# define gl_oset_nx_create_empty gl_oset_nx_create_empty_inline
static inline gl_oset_t
-gl_oset_create_empty (gl_oset_implementation_t implementation,
- gl_setelement_compar_fn compar_fn)
+gl_oset_nx_create_empty (gl_oset_implementation_t implementation,
+ gl_setelement_compar_fn compar_fn,
+ gl_setelement_dispose_fn dispose_fn)
{
- return implementation->create_empty (implementation, compar_fn);
+ return implementation->nx_create_empty (implementation, compar_fn,
+ dispose_fn);
}
# define gl_oset_size gl_oset_size_inline
return ((const struct gl_oset_impl_base *) set)->vtable->search (set, elt);
}
-# define gl_oset_add gl_oset_add_inline
+# define gl_oset_search_atleast gl_oset_search_atleast_inline
static inline bool
-gl_oset_add (gl_oset_t set, const void *elt)
+gl_oset_search_atleast (gl_oset_t set,
+ gl_setelement_threshold_fn threshold_fn,
+ const void *threshold, const void **eltp)
+{
+ return ((const struct gl_oset_impl_base *) set)->vtable
+ ->search_atleast (set, threshold_fn, threshold, eltp);
+}
+
+# define gl_oset_nx_add gl_oset_nx_add_inline
+static inline int
+gl_oset_nx_add (gl_oset_t set, const void *elt)
{
- return ((const struct gl_oset_impl_base *) set)->vtable->add (set, elt);
+ return ((const struct gl_oset_impl_base *) set)->vtable->nx_add (set, elt);
}
# define gl_oset_remove gl_oset_remove_inline
static inline bool
gl_oset_remove (gl_oset_t set, const void *elt)
{
- return ((const struct gl_oset_impl_base *) set)->vtable->remove (set, elt);
+ return ((const struct gl_oset_impl_base *) set)->vtable
+ ->remove_elt (set, elt);
}
# define gl_oset_free gl_oset_free_inline
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