From: Jaroslav Kysela <perex@perex.cz>
Date: Mon, 11 Nov 2019 13:22:11 +0000 (+0100)
Subject: mixer: simple - add snd_mixer_selem_id_parse() from amixer
X-Git-Tag: v1.2.1~11
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=4ce38a5ff466d18039b2606938f866ea3a6c9f3c;p=alsa-lib.git

mixer: simple - add snd_mixer_selem_id_parse() from amixer

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

diff --git a/include/mixer.h b/include/mixer.h
index 9352894a..51b6f04a 100644
--- a/include/mixer.h
+++ b/include/mixer.h
@@ -304,6 +304,7 @@ const char *snd_mixer_selem_id_get_name(const snd_mixer_selem_id_t *obj);
 unsigned int snd_mixer_selem_id_get_index(const snd_mixer_selem_id_t *obj);
 void snd_mixer_selem_id_set_name(snd_mixer_selem_id_t *obj, const char *val);
 void snd_mixer_selem_id_set_index(snd_mixer_selem_id_t *obj, unsigned int val);
+int snd_mixer_selem_id_parse(snd_mixer_selem_id_t *dst, const char *str);
 
 /** \} */
 
diff --git a/src/mixer/simple.c b/src/mixer/simple.c
index 34d58ede..2861d97c 100644
--- a/src/mixer/simple.c
+++ b/src/mixer/simple.c
@@ -1052,3 +1052,56 @@ void snd_mixer_selem_id_set_index(snd_mixer_selem_id_t *obj, unsigned int val)
 	assert(obj);
 	obj->index = val;
 }
+
+/**
+ * \brief Parse ASCII simple mixer element identifier
+ * \param dst Parsed simple mixer element identifier
+ * \param str Mixer simple element ASCII representation
+ */
+int snd_mixer_selem_id_parse(snd_mixer_selem_id_t *dst, const char *str)
+{
+	int c, size;
+	char buf[128];
+	char *ptr = buf;
+
+	memset(dst, 0, sizeof(*dst));
+	while (*str == ' ' || *str == '\t')
+		str++;
+	if (!(*str))
+		return -EINVAL;
+	size = 1;	/* for '\0' */
+	if (*str != '"' && *str != '\'') {
+		while (*str && *str != ',') {
+			if (size < (int)sizeof(buf)) {
+				*ptr++ = *str;
+				size++;
+			}
+			str++;
+		}
+	} else {
+		c = *str++;
+		while (*str && *str != c) {
+			if (size < (int)sizeof(buf)) {
+				*ptr++ = *str;
+				size++;
+			}
+			str++;
+		}
+		if (*str == c)
+			str++;
+	}
+	if (*str == '\0') {
+		*ptr = 0;
+		goto _set;
+	}
+	if (*str != ',')
+		return -EINVAL;
+	*ptr = 0;	/* terminate the string */
+	str++;
+	if (str[0] < '0' || str[1] > '9')
+		return -EINVAL;
+	dst->index = atoi(str);
+       _set:
+	snd_strlcpy(dst->name, buf, sizeof(dst->name));
+	return 0;
+}