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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_DICT_H
#define SPA_DICT_H
#ifdef __cplusplus
extern "C" {
#endif
#include <string.h>
#include <spa/utils/defs.h>
#ifndef SPA_API_DICT
#ifdef SPA_API_IMPL
#define SPA_API_DICT SPA_API_IMPL
#else
#define SPA_API_DICT static inline
#endif
#endif
/**
* \defgroup spa_dict Dictionary
* Dictionary data structure
*/
/**
* \addtogroup spa_dict
* \{
*/
struct spa_dict_item {
const char *key;
const char *value;
};
#define SPA_DICT_ITEM(key,value) ((struct spa_dict_item) { (key), (value) })
#define SPA_DICT_ITEM_INIT(key,value) 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(items,n_items) ((struct spa_dict) { 0, (n_items), (items) })
#define SPA_DICT_ARRAY(items) SPA_DICT((items),SPA_N_ELEMENTS(items))
#define SPA_DICT_ITEMS(...) SPA_DICT_ARRAY(((struct spa_dict_item[]) { __VA_ARGS__}))
#define SPA_DICT_INIT(items,n_items) SPA_DICT(items,n_items)
#define SPA_DICT_INIT_ARRAY(items) SPA_DICT_ARRAY(items)
#define spa_dict_for_each(item, dict) \
for ((item) = (dict)->items; \
(item) < &(dict)->items[(dict)->n_items]; \
(item)++)
SPA_API_DICT 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);
}
SPA_API_DICT 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);
}
SPA_API_DICT 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;
}
SPA_API_DICT 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 */