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dict.h
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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>
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)
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 */
defs.h
spa/utils/defs.h
SPA_DICT_ITEM_INIT
#define SPA_DICT_ITEM_INIT(key, value)
Definition dict.h:37
spa_dict_qsort
static void spa_dict_qsort(struct spa_dict *dict)
Definition dict.h:64
spa_dict_item_compare
static int spa_dict_item_compare(const void *i1, const void *i2)
Definition dict.h:57
spa_dict_lookup_item
static const struct spa_dict_item * spa_dict_lookup_item(const struct spa_dict *dict, const char *key)
Definition dict.h:72
spa_dict_lookup
static const char * spa_dict_lookup(const struct spa_dict *dict, const char *key)
Definition dict.h:95
SPA_DICT_FLAG_SORTED
#define SPA_DICT_FLAG_SORTED
items are sorted
Definition dict.h:41
spa_dict_for_each
#define spa_dict_for_each(item, dict)
Definition dict.h:52
SPA_FLAG_SET
#define SPA_FLAG_SET(field, flag)
Definition defs.h:79
SPA_FLAG_IS_SET
#define SPA_FLAG_IS_SET(field, flag)
Definition defs.h:76
string.h
spa/utils/string.h
spa_dict_item
Definition dict.h:31
spa_dict_item::key
const char * key
Definition dict.h:32
spa_dict_item::value
const char * value
Definition dict.h:33
spa_dict
Definition dict.h:39
spa_dict::items
const struct spa_dict_item * items
Definition dict.h:44
spa_dict::n_items
uint32_t n_items
Definition dict.h:43
spa_dict::flags
uint32_t flags
Definition dict.h:42