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ucm: substitute define IDs and macro arguments (Syntax 9)

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It is useful to substitute the variable names and string
macro arguments. It may simplify the UCM configurations.

E.g.:

  Define."${var:Name} Suffix" "Value"
  Macro.a.DoIt "Channels=${var:PlaybackChannels}"

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2026-02-05 17:33:07 +01:00
parent 5414277612
commit e02e9dc6cf
2 changed files with 22 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

24
src/ucm/parser.c
View file

@ -391,7 +391,7 @@ static int evaluate_define(snd_use_case_mgr_t *uc_mgr,
snd_config_iterator_t i, next;
snd_config_t *d, *n;
const char *id;
char *var, *s;
char *var, *s, *sid;
int err;
err = snd_config_search(cfg, "Define", &d);
@ -427,8 +427,18 @@ static int evaluate_define(snd_use_case_mgr_t *uc_mgr,
snd_error(UCM, "value names starting with '@' are reserved for application variables");
return -EINVAL;
}
err = uc_mgr_set_variable(uc_mgr, id, s);
sid = (char *)id;
if (uc_mgr->conf_format >= 9) {
err = uc_mgr_get_substituted_value(uc_mgr, &sid, id);
if (err < 0) {
free(s);
return err;
}
}
err = uc_mgr_set_variable(uc_mgr, sid, s);
free(s);
if (id != sid)
free(sid);
if (err < 0)
return err;
}
@ -495,7 +505,15 @@ static int evaluate_macro1(snd_use_case_mgr_t *uc_mgr,
err = snd_config_get_string(args, &s);
if (err < 0)
return err;
err = snd_config_load_string(&a, s, 0);
if (uc_mgr->conf_format < 9) {
err = snd_config_load_string(&a, s, 0);
} else {
err = uc_mgr_get_substituted_value(uc_mgr, &var2, s);
if (err >= 0) {
err = snd_config_load_string(&a, var2, 0);
free(var2);
}
}
if (err < 0)
return err;
} else if (snd_config_get_type(args) != SND_CONFIG_TYPE_COMPOUND) {

2
src/ucm/ucm_local.h
View file

@ -35,7 +35,7 @@
#include <stdbool.h>
#include "use-case.h"
#define SYNTAX_VERSION_MAX 8
#define SYNTAX_VERSION_MAX 9
#define MAX_CARD_SHORT_NAME 32
#define MAX_CARD_LONG_NAME 80