Implement a priority based sink order assignment

This is handsome when using udev based device discovery.

1 files changed, 93 insertions, 0 deletions

diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..e24ece0
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,93 @@
+#include <glib.h>
+#include <string.h>
+
+#include "pa-sink-ctl.h"
+#include "config.h"
+
+static int
+parse_priorities(struct config *cfg)
+{
+	gchar **groups;
+	struct priority p;
+	int i;
+	gsize length;
+	GError *error = NULL;
+
+	groups = g_key_file_get_groups(cfg->keyfile, &length);
+
+	for (i = 0; i < length; ++i) {
+		if (strncmp(groups[i], "priority", 8) != 0)
+			continue;
+
+		memset(&p, 0, sizeof p);
+
+		p.match = g_key_file_get_value(cfg->keyfile, groups[i],
+					       "match", &error);
+		if (error)
+			goto error;
+		p.value = g_key_file_get_value(cfg->keyfile, groups[i],
+					       "value", &error);
+		if (error)
+			goto error;
+		p.priority = g_key_file_get_integer(cfg->keyfile, groups[i],
+						    "priority", &error);
+		if (error)
+			goto error;
+
+		list_append_struct(cfg->priorities, p);
+	}
+
+	return 0;
+
+error:
+	if (p.value)
+		g_free(p.value);
+	if (p.match)
+		g_free(p.match);
+
+	g_printerr("Failed to read property in prioritiy group '%s': %s\n",
+		   groups[i], error->message);
+
+	return -1;
+}
+
+static void
+destroy_priority(gpointer data)
+{
+	struct priority *p = data;
+
+	g_free(p->value);
+	g_free(p->match);
+	g_free(p);
+}
+
+int
+config_init(struct config *cfg)
+{
+	GError *error = NULL;
+
+	memset(cfg, 0, sizeof *cfg);
+	cfg->keyfile = g_key_file_new();
+	cfg->priorities = NULL;
+
+	if (!g_key_file_load_from_data_dirs(cfg->keyfile,
+					    "pa-sink-ctl/config.ini",
+					    NULL, G_KEY_FILE_NONE, &error)
+	    && error) {
+		g_printerr("Failed to open config file: %s\n", error->message);
+		return -1;
+	}
+
+	if (parse_priorities(cfg) < 0)
+		return -1;
+
+	return 0;
+}
+
+void
+config_uninit(struct config *cfg)
+{
+	g_list_free_full(cfg->priorities, destroy_priority);
+
+	g_key_file_free(cfg->keyfile);
+}