sticker: added song sticker library

This is a wrapper for the backend sticker library.  It provides
several glue functions which take a song object instead of type/uri.

src/Makefile.am

@@ -97,6 +97,7 @@ mpd_headers = \
 	song.h \
 	song_print.h \
 	song_save.h \
+	song_sticker.h \
 	songvec.h \
 	state_file.h \
 	stats.h \
@@ -194,7 +195,7 @@ mpd_SOURCES = \
 	timer.c
 
 if ENABLE_SQLITE
-mpd_SOURCES += sticker.c
+mpd_SOURCES += sticker.c song_sticker.c
 endif
 
 if HAVE_LIBSAMPLERATE

src/song_sticker.c

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2003-2009 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "song_sticker.h"
+#include "song.h"
+#include "sticker.h"
+
+#include <glib.h>
+
+#include <assert.h>
+
+char *
+sticker_song_get_value(const struct song *song, const char *name)
+{
+	char *uri, *value;
+
+	assert(song != NULL);
+	assert(song_in_database(song));
+
+	uri = song_get_uri(song);
+	value = sticker_load_value("song", uri, name);
+	g_free(uri);
+
+	return value;
+}
+
+bool
+sticker_song_set_value(const struct song *song,
+		       const char *name, const char *value)
+{
+	char *uri;
+	bool ret;
+
+	assert(song != NULL);
+	assert(song_in_database(song));
+
+	uri = song_get_uri(song);
+	ret = sticker_store_value("song", uri, name, value);
+	g_free(uri);
+
+	return ret;
+}
+
+bool
+sticker_song_delete(const struct song *song)
+{
+	char *uri;
+	bool ret;
+
+	assert(song != NULL);
+	assert(song_in_database(song));
+
+	uri = song_get_uri(song);
+	ret = sticker_delete("song", uri);
+	g_free(uri);
+
+	return ret;
+}

src/song_sticker.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2003-2009 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef SONG_STICKER_H
+#define SONG_STICKER_H
+
+#include <stdbool.h>
+
+struct song;
+
+/**
+ * Returns one value from a song's sticker record.  The caller must
+ * free the return value with g_free().
+ */
+char *
+sticker_song_get_value(const struct song *song, const char *name);
+
+/**
+ * Sets a sticker value in the specified song.  Overwrites existing
+ * values.
+ */
+bool
+sticker_song_set_value(const struct song *song,
+		       const char *name, const char *value);
+
+/**
+ * Deletes a sticker from the database.  All values are deleted.
+ */
+bool
+sticker_song_delete(const struct song *song);
+
+#endif