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json: add and use spa_json_str_object_find()

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Parse a string as a json object and copy the value with key as a string.
This commit is contained in:
Wim Taymans 2024-09-16 13:12:05 +02:00
parent 1fb13fd0be
commit b5cccdb382
6 changed files with 68 additions and 86 deletions
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26
spa/include/spa/utils/json.h
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@ -145,6 +145,32 @@ static inline int spa_json_object_next(struct spa_json *iter, char *key, int max
}
}
static inline int spa_json_object_find(struct spa_json *iter, const char *key, const char **value)
{
struct spa_json obj = SPA_JSON_SAVE(iter);
int res, len = strlen(key) + 3;
char k[len];
while ((res = spa_json_object_next(&obj, k, len, value)) > 0)
if (spa_streq(k, key))
return res;
return -ENOENT;
}
static inline int spa_json_str_object_find(const char *obj, size_t obj_len,
const char *key, char *value, size_t maxlen)
{
struct spa_json iter;
int l;
const char *v;
if (spa_json_begin_object(&iter, obj, obj_len) <= 0)
return -EINVAL;
if ((l = spa_json_object_find(&iter, key, &v)) <= 0)
return l;
return spa_json_parse_stringn(v, l, value, maxlen);
}
/* array */
static inline int spa_json_enter_array(struct spa_json *iter, struct spa_json *sub)
{