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ucm: substitute the merged tree completely

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We need to define the common shared configuration like for multiple
HDMI devices or so. Substitute the whole merged configuration tree
including identifiers.

Fixes: https://github.com/alsa-project/alsa-lib/issues/67
Fixes: dcef48f13d
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2020-07-06 16:34:33 +02:00
parent 30d12e930c
commit 32addac948
4 changed files with 66 additions and 4 deletions
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53
src/ucm/ucm_subs.c
View file

@ -395,3 +395,56 @@ __error:
free(r);
return err;
}
static inline int uc_mgr_substitute_check(const char *s)
{
return s && strstr(s, "${") != NULL;
}
int uc_mgr_substitute_tree(snd_use_case_mgr_t *uc_mgr, snd_config_t *node)
{
snd_config_iterator_t i, next;
snd_config_t *n;
const char *id, *s2;
char *s;
int err;
err = snd_config_get_id(node, &id);
if (err < 0)
return err;
if (uc_mgr_substitute_check(id)) {
err = uc_mgr_get_substituted_value(uc_mgr, &s, id);
if (err < 0)
return err;
err = snd_config_set_id(node, s);
free(s);
if (err < 0) {
uc_error("unable to set substituted id '%s' (old id '%s')", s, id);
return err;
}
}
if (snd_config_get_type(node) != SND_CONFIG_TYPE_COMPOUND) {
if (snd_config_get_type(node) == SND_CONFIG_TYPE_STRING) {
err = snd_config_get_string(node, &s2);
if (err < 0)
return err;
if (!uc_mgr_substitute_check(s2))
return 0;
err = uc_mgr_get_substituted_value(uc_mgr, &s, s2);
if (err < 0)
return err;
err = snd_config_set_string(node, s);
free(s);
if (err < 0)
return err;
}
return 0;
}
snd_config_for_each(i, next, node) {
n = snd_config_iterator_entry(i);
err = uc_mgr_substitute_tree(uc_mgr, n);
if (err < 0)
return err;
}
return 0;
}