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ucm: add If.Condition.String to match strings and substrings

Browse source 
Case insensitive string match:

If.1 {
	Condition {
		Type String
		String1 "aa"
		String2 "bb"
	}
	True {
		...
	}
}

Substring is present (case sensitive):

If.1 {
	Condition {
		Type String
		Haystack "White Horse"
		Needle "Horse"
	}
	True {
		...
	}
}

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2019-11-06 09:51:47 +01:00
parent cd4b07ffbd
commit b7d74c6977
1 changed files with 86 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

88
src/ucm/ucm_cond.c
View file

@ -37,6 +37,86 @@ static int get_string(snd_config_t *compound, const char *key, const char **str)
return snd_config_get_string(node, str);
}
static int if_eval_string(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
{
const char *string1 = NULL, *string2 = NULL;
char *s1, *s2;
int err;
err = get_string(eval, "String1", &string1);
if (err < 0 && err != -ENOENT) {
uc_error("String error (If.Condition.String1)");
return -EINVAL;
}
err = get_string(eval, "String2", &string2);
if (err < 0 && err != -ENOENT) {
uc_error("String error (If.Condition.String2)");
return -EINVAL;
}
if (string1 || string2) {
if (string1 == NULL) {
uc_error("If.Condition.String1 not defined");
return -EINVAL;
}
if (string2 == NULL) {
uc_error("If.Condition.String2 not defined");
return -EINVAL;
}
err = uc_mgr_get_substituted_value(uc_mgr, &s1, string1);
if (err < 0)
return err;
err = uc_mgr_get_substituted_value(uc_mgr, &s2, string2);
if (err < 0) {
free(s1);
return err;
}
err = strcasecmp(string1, string2) == 0;
free(s2);
free(s1);
return err;
}
err = get_string(eval, "Haystack", &string1);
if (err < 0 && err != -ENOENT) {
uc_error("String error (If.Condition.Haystack)");
return -EINVAL;
}
err = get_string(eval, "Needle", &string2);
if (err < 0 && err != -ENOENT) {
uc_error("String error (If.Condition.Needle)");
return -EINVAL;
}
if (string1 || string2) {
if (string1 == NULL) {
uc_error("If.Condition.Haystack not defined");
return -EINVAL;
}
if (string2 == NULL) {
uc_error("If.Condition.Needle not defined");
return -EINVAL;
}
err = uc_mgr_get_substituted_value(uc_mgr, &s1, string1);
if (err < 0)
return err;
err = uc_mgr_get_substituted_value(uc_mgr, &s2, string2);
if (err < 0) {
free(s1);
return err;
}
err = strstr(string1, string2) == 0;
free(s2);
free(s1);
return err;
}
uc_error("Unknown String condition arguments");
return -EINVAL;
}
static int if_eval_control_exists(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
{
snd_ctl_t *ctl;
@ -46,18 +126,19 @@ static int if_eval_control_exists(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval
char *s;
int err;
snd_ctl_elem_id_alloca(&elem_id);
snd_ctl_elem_info_alloca(&elem_info);
err = get_string(eval, "Device", &device);
if (err < 0 && err != -ENOENT) {
uc_error("control device error (If.Condition.Device)");
uc_error("ControlExists error (If.Condition.Device)");
return -EINVAL;
}
err = get_string(eval, "Control", &ctldef);
if (err < 0) {
uc_error("control device error (If.Condition.Control)");
uc_error("ControlExists error (If.Condition.Control)");
return -EINVAL;
}
@ -114,6 +195,9 @@ static int if_eval(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
if (strcmp(type, "ControlExists") == 0)
return if_eval_control_exists(uc_mgr, eval);
if (strcmp(type, "String") == 0)
return if_eval_string(uc_mgr, eval);
uc_error("unknown If.Condition.Type");
return -EINVAL;
}