mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2026-03-19 05:33:43 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

ucm: allow string with substitution for If.Condition block (Syntax 9)

Browse source 
When If.Condition is a string type instead of compound, parse it using
snd_config_load_string with variable substitution support for syntax v9+.
This allows more flexible condition definitions using variable references.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2026-02-06 18:41:30 +01:00
parent 30d1ae7221
commit c41f795f5c
1 changed files with 41 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

54
src/ucm/ucm_cond.c
View file

@ -452,7 +452,9 @@ static int if_eval_one(snd_use_case_mgr_t *uc_mgr,
snd_config_t **prepend,
snd_config_t **append)
{
snd_config_t *expr, *_true = NULL, *_false = NULL;
snd_config_t *expr, *expr_eval = NULL, *_true = NULL, *_false = NULL;
const char *s;
char *s1;
int err, has_condition;
*result = NULL;
@ -467,73 +469,99 @@ static int if_eval_one(snd_use_case_mgr_t *uc_mgr,
/* For syntax v8+, Condition is optional if Prepend or Append is present */
has_condition = snd_config_search(cond, "Condition", &expr) >= 0;
if (has_condition && uc_mgr->conf_format >= 9 &&
snd_config_get_type(expr) == SND_CONFIG_TYPE_STRING) {
err = snd_config_get_string(expr, &s);
if (err < 0) {
snd_error(UCM, "Condition string error (If)");
return -EINVAL;
}
err = uc_mgr_get_substituted_value(uc_mgr, &s1, s);
if (err >= 0) {
err = snd_config_load_string(&expr_eval, s1, 0);
free(s1);
}
if (err < 0) {
snd_error(UCM, "Condition string parse error (If)");
return err;
}
expr = expr_eval;
}
if (uc_mgr->conf_format >= 8) {
/* Check for Prepend block */
err = snd_config_search(cond, "Prepend", prepend);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "prepend block error (If)");
return -EINVAL;
goto __error;
}
/* Check for Append block */
err = snd_config_search(cond, "Append", append);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "append block error (If)");
return -EINVAL;
goto __error;
}
/* If Prepend or Append is present, Condition can be omitted */
if (!has_condition && (*prepend == NULL && *append == NULL)) {
snd_error(UCM, "condition block expected (If)");
return -EINVAL;
goto __error;
}
} else {
if (!has_condition) {
snd_error(UCM, "condition block expected (If)");
return -EINVAL;
goto __error;
}
}
err = snd_config_search(cond, "True", &_true);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "true block error (If)");
return -EINVAL;
goto __error;
}
err = snd_config_search(cond, "False", &_false);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "false block error (If)");
return -EINVAL;
goto __error;
}
err = snd_config_search(cond, "Before", before);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "before block identifier error");
return -EINVAL;
goto __error;
}
err = snd_config_search(cond, "After", after);
if (err < 0 && err != -ENOENT) {
snd_error(UCM, "before block identifier error");
return -EINVAL;
goto __error;
}
/* Evaluate condition if present */
if (has_condition) {
err = if_eval(uc_mgr, expr);
if (err < 0)
goto __error;
if (err > 0) {
*result = _true;
return 0;
goto __return;
} else if (err == 0) {
*result = _false;
return 0;
} else {
return err;
goto __return;
}
}
/* If no condition (v8+ with Prepend/Append only), no result block */
return 0;
__error:
err = -EINVAL;
__return:
if (expr_eval)
snd_config_delete(expr_eval);
return err;
}
#if 0