output/recorder: dynamic file name

src/util/format.h

@@ -0,0 +1,51 @@
+/*
+ * music player command (mpc)
+ * Copyright (C) 2003-2015 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.
+ */
+
+#ifndef MPC_FORMAT_H
+#define MPC_FORMAT_H
+
+#include "Compiler.h"
+
+struct mpd_song;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Pretty-print an object into a string using the given format
+ * specification.
+ *
+ * @param format the format string
+ * @param object the object
+ * @param getter a getter function that extracts a value from the object
+ * @return the resulting string to be freed by free(); NULL if
+ * no format string group produced any output
+ */
+gcc_malloc
+char *
+format_object(const char *format, const void *object,
+	      const char *(*getter)(const void *object, const char *name));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif