ucm: add If.Condition.RegexMatch

If.1 {
	Condition {
		Type RegexMatch
		String "something to match"
		Regex ".*(thing)"
	}
	...
}

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/ucm/ucm_cond.c b/src/ucm/ucm_cond.c
index 3df83bd2ef091aca349cd275af2010b51cd273f6..3ec534c0eb0e9428b04390ad159647e5b89e3965 100644 (file)
--- a/src/ucm/ucm_cond.c
+++ b/src/ucm/ucm_cond.c
@@ -25,6 +25,7 @@
  */
 
 #include "ucm_local.h"
+#include <regex.h>
 
 static int get_string(snd_config_t *compound, const char *key, const char **str)
 {
@@ -117,6 +118,48 @@ static int if_eval_string(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
        return -EINVAL;
 }
 
+static int if_eval_regex_match(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
+{
+       const char *string, *regex_string;
+       char *s;
+       regex_t re;
+       int options = REG_EXTENDED | REG_ICASE;
+       regmatch_t match[1];
+       int err;
+
+       err = get_string(eval, "String", &string);
+       if (err < 0) {
+               uc_error("RegexMatch error (If.Condition.String)");
+               return -EINVAL;
+       }
+
+       err = get_string(eval, "Regex", &regex_string);
+       if (err < 0) {
+               uc_error("RegexMatch error (If.Condition.Regex)");
+               return -EINVAL;
+       }
+
+       err = uc_mgr_get_substituted_value(uc_mgr, &s, regex_string);
+       if (err < 0)
+               return err;
+       err = regcomp(&re, s, options);
+       free(s);
+       if (err) {
+               uc_error("Regex '%s' compilation failed (code %d)", err);
+               return -EINVAL;
+       }
+
+       err = uc_mgr_get_substituted_value(uc_mgr, &s, string);
+       if (err < 0) {
+               regfree(&re);
+               return err;
+       }
+       err = regexec(&re, s, ARRAY_SIZE(match), match, 0);
+       free(s);
+       regfree(&re);
+       return err == 0;
+}
+
 static int if_eval_control_exists(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
 {
        snd_ctl_t *ctl;
@@ -198,6 +241,9 @@ static int if_eval(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
        if (strcmp(type, "String") == 0)
                return if_eval_string(uc_mgr, eval);
 
+       if (strcmp(type, "RegexMatch") == 0)
+               return if_eval_regex_match(uc_mgr, eval);
+
        uc_error("unknown If.Condition.Type");
        return -EINVAL;
 }