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94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
/* Simple dictionary
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*
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* Copyright 2005 Juan Lang
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*
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* This is a pretty basic dictionary, or map if you prefer. It's not
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* thread-safe.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __DICTIONARY_H__
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#define __DICTIONARY_H__
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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struct dictionary;
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/* Returns whether key a is less than, equal to, or greater than key b, in
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* the same way (a - b) would for integers or strcmp(a, b) would for ANSI
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* strings.
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*/
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typedef int (*comparefunc)(const void *a, const void *b, void *extra);
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/* Called for every element removed from the dictionary. See
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* dictionary_destroy, dictionary_insert, and dictionary_remove.
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*/
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typedef void (*destroyfunc)(void *k, void *v, void *extra);
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/* Called for each element in the dictionary. Return FALSE if you don't want
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* to enumerate any more.
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*/
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typedef BOOL (*enumeratefunc)(const void *k, const void *v, void *extra,
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void *closure);
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/* Constructs a dictionary, using c as a comparison function for keys.
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* If d is not NULL, it will be called whenever an item is about to be removed
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* from the table, for example when dictionary_remove is called for a key, or
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* when dictionary_destroy is called.
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* extra is passed to c (and d, if it's provided).
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* Assumes c is not NULL.
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*/
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struct dictionary *dictionary_create(comparefunc c, destroyfunc d, void *extra);
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/* Assumes d is not NULL. */
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void dictionary_destroy(struct dictionary *d);
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/* Returns how many entries have been stored in the dictionary. If two values
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* with the same key are inserted, only one is counted.
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*/
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UINT dictionary_num_entries(struct dictionary *d);
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/* Sets an element with key k and value v to the dictionary. If a value
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* already exists with key k, its value is replaced, and the destroyfunc (if
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* set) is called for the previous item.
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* Assumes k and v can be bitwise-copied.
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* Both k and v are allowed to be NULL, in case you want to use integer
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* values for either the key or the value.
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* Assumes d is not NULL.
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*/
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void dictionary_insert(struct dictionary *d, const void *k, const void *v);
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/* If a value with key k has been inserted into the dictionary, *v is set
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* to its associated value. Returns FALSE if the key is not found, and TRUE
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* if it is. *v is undefined if it returns FALSE. (It is not set to NULL,
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* because this dictionary doesn't prevent you from using NULL as a value
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* value; see dictionary_insert.)
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* Assumes d and v are not NULL.
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*/
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BOOL dictionary_find(struct dictionary *d, const void *k, void **v);
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/* Removes the element with key k from the dictionary. Calls the destroyfunc
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* for the dictionary with the element if found (so you may destroy it if it's
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* dynamically allocated.)
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* Assumes d is not NULL.
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*/
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void dictionary_remove(struct dictionary *d, const void *k);
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void dictionary_enumerate(struct dictionary *d, enumeratefunc e, void *closure);
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#endif /* ndef __DICTIONARY_H__ */
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