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