зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.1 KiB
C
105 строки
3.1 KiB
C
/* Simple Plugin API
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef SPA_DICT_H
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#define SPA_DICT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <string.h>
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#include <spa/utils/defs.h>
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struct spa_dict_item {
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const char *key;
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const char *value;
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};
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#define SPA_DICT_ITEM_INIT(key,value) (struct spa_dict_item) { key, value }
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struct spa_dict {
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#define SPA_DICT_FLAG_SORTED (1<<0) /**< items are sorted */
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uint32_t flags;
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uint32_t n_items;
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const struct spa_dict_item *items;
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};
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#define SPA_DICT_INIT(items,n_items) (struct spa_dict) { 0, n_items, items }
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#define SPA_DICT_INIT_ARRAY(items) (struct spa_dict) { 0, SPA_N_ELEMENTS(items), items }
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#define spa_dict_for_each(item, dict) \
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for ((item) = (dict)->items; \
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(item) < &(dict)->items[(dict)->n_items]; \
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(item)++)
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static inline int spa_dict_item_compare(const void *i1, const void *i2)
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{
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const struct spa_dict_item *it1 = (const struct spa_dict_item *)i1,
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*it2 = (const struct spa_dict_item *)i2;
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return strcmp(it1->key, it2->key);
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}
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static inline void spa_dict_qsort(struct spa_dict *dict)
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{
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qsort((void*)dict->items, dict->n_items, sizeof(struct spa_dict_item),
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spa_dict_item_compare);
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SPA_FLAG_SET(dict->flags, SPA_DICT_FLAG_SORTED);
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}
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static inline const struct spa_dict_item *spa_dict_lookup_item(const struct spa_dict *dict,
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const char *key)
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{
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const struct spa_dict_item *item;
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if (SPA_FLAG_IS_SET(dict->flags, SPA_DICT_FLAG_SORTED)) {
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struct spa_dict_item k = SPA_DICT_ITEM_INIT(key, NULL);
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item = (const struct spa_dict_item *)bsearch(&k,
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(const void *) dict->items, dict->n_items,
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sizeof(struct spa_dict_item),
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spa_dict_item_compare);
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if (item != NULL)
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return item;
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} else {
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spa_dict_for_each(item, dict) {
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if (!strcmp(item->key, key))
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return item;
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}
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}
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return NULL;
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}
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static inline const char *spa_dict_lookup(const struct spa_dict *dict, const char *key)
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{
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const struct spa_dict_item *item = spa_dict_lookup_item(dict, key);
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return item ? item->value : NULL;
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}
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_DICT_H */
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