db_save, state_file: convert to C++

1 files changed, 94 insertions, 0 deletions

diff --git a/src/OutputState.cxx b/src/OutputState.cxx
new file mode 100644
index 000000000..95aeacbca
--- /dev/null
+++ b/src/OutputState.cxx
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Saving and loading the audio output states to/from the state file.
+ *
+ */
+
+#include "config.h"
+#include "OutputState.hxx"
+#include "output_internal.h"
+
+extern "C" {
+#include "output_all.h"
+}
+
+#include <glib.h>
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define AUDIO_DEVICE_STATE "audio_device_state:"
+
+unsigned audio_output_state_version;
+
+void
+audio_output_state_save(FILE *fp)
+{
+	unsigned n = audio_output_count();
+
+	assert(n > 0);
+
+	for (unsigned i = 0; i < n; ++i) {
+		const struct audio_output *ao = audio_output_get(i);
+
+		fprintf(fp, AUDIO_DEVICE_STATE "%d:%s\n",
+			ao->enabled, ao->name);
+	}
+}
+
+bool
+audio_output_state_read(const char *line)
+{
+	long value;
+	char *endptr;
+	const char *name;
+	struct audio_output *ao;
+
+	if (!g_str_has_prefix(line, AUDIO_DEVICE_STATE))
+		return false;
+
+	line += sizeof(AUDIO_DEVICE_STATE) - 1;
+
+	value = strtol(line, &endptr, 10);
+	if (*endptr != ':' || (value != 0 && value != 1))
+		return false;
+
+	if (value != 0)
+		/* state is "enabled": no-op */
+		return true;
+
+	name = endptr + 1;
+	ao = audio_output_find(name);
+	if (ao == NULL) {
+		g_debug("Ignoring device state for '%s'", name);
+		return true;
+	}
+
+	ao->enabled = false;
+	return true;
+}
+
+unsigned
+audio_output_state_get_version(void)
+{
+	return audio_output_state_version;
+}