db/Directory: move isRootDirectory() to Uri.hxx

Decouple command/OtherCommands.cxx from the "simple" database plugin.

Makefile.am

@@ -103,6 +103,7 @@ src_mpd_SOURCES = \
 	src/decoder/DecoderPlugin.hxx \
 	src/decoder/DecoderInternal.cxx src/decoder/DecoderInternal.hxx \
 	src/decoder/DecoderPrint.cxx src/decoder/DecoderPrint.hxx \
+	src/db/Uri.hxx \
 	src/db/Directory.cxx src/db/Directory.hxx \
 	src/db/DirectorySave.cxx src/db/DirectorySave.hxx \
 	src/db/DatabaseSimple.hxx \

src/command/OtherCommands.cxx

@@ -22,7 +22,7 @@
 #include "DatabaseCommands.hxx"
 #include "db/update/UpdateGlue.hxx"
 #include "CommandError.hxx"
-#include "db/Directory.hxx"
+#include "db/Uri.hxx"
 #include "DetachedSong.hxx"
 #include "SongPrint.hxx"
 #include "TagPrint.hxx"

src/db/Directory.cxx

@@ -20,6 +20,7 @@
 #include "config.h"
 #include "Directory.hxx"
 #include "LightDirectory.hxx"
+#include "Uri.hxx"
 #include "SongFilter.hxx"
 #include "PlaylistVector.hxx"
 #include "db/DatabaseLock.hxx"

src/db/Directory.hxx

@@ -239,10 +239,4 @@ public:
 	LightDirectory Export() const;
 };
 
-static inline bool
-isRootDirectory(const char *name)
-{
-	return name[0] == 0 || (name[0] == '/' && name[1] == 0);
-}
-
 #endif

src/db/Uri.hxx

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2003-2014 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 MPD_DB_URI_HXX
+#define MPD_DB_URI_HXX
+
+static inline bool
+isRootDirectory(const char *name)
+{
+	return name[0] == 0 || (name[0] == '/' && name[1] == 0);
+}
+
+#endif

src/db/update/UpdateWalk.cxx

@@ -29,6 +29,7 @@
 #include "db/Directory.hxx"
 #include "db/Song.hxx"
 #include "db/PlaylistVector.hxx"
+#include "db/Uri.hxx"
 #include "playlist/PlaylistRegistry.hxx"
 #include "Mapper.hxx"
 #include "ExcludeList.hxx"