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conf: add snd_config_is_empty() function

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2021-05-13 10:59:43 +02:00
parent da33eda632
commit 3050af4b90
2 changed files with 14 additions and 0 deletions
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1
include/conf.h
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@ -141,6 +141,7 @@ int snd_config_imake_pointer(snd_config_t **config, const char *key, const void
snd_config_type_t snd_config_get_type(const snd_config_t *config);
int snd_config_is_array(const snd_config_t *config);
int snd_config_is_empty(const snd_config_t *config);
int snd_config_set_id(snd_config_t *config, const char *id);
int snd_config_set_integer(snd_config_t *config, long value);

13
src/conf.c
View file

@ -1832,6 +1832,19 @@ int snd_config_is_array(const snd_config_t *config)
return 1;
}
/**
* \brief Returns if the compound has no fields (is empty).
* \param config Handle to the configuration node.
* \return A positive value when true, zero when false, otherwise a negative error code.
*/
int snd_config_is_empty(const snd_config_t *config)
{
assert(config);
if (config->type != SND_CONFIG_TYPE_COMPOUND)
return -EINVAL;
return list_empty(&config->u.compound.fields);
}
/**
* \brief Returns the id of a configuration node.
* \param[in] config Handle to the configuration node.