22 files changed, 1007 insertions, 138 deletions

diff --git a/src/fs/AllocatedPath.cxx b/src/fs/AllocatedPath.cxx
index 37b79a685..30ce7e3a9 100644
--- a/src/fs/AllocatedPath.cxx
+++ b/src/fs/AllocatedPath.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -24,29 +24,32 @@
 #include "util/Error.hxx"
 #include "Compiler.h"
 
+#ifdef HAVE_GLIB
 #include <glib.h>
+#endif
 
-#include <assert.h>
 #include <string.h>
 
+#ifdef HAVE_GLIB
+
 inline AllocatedPath::AllocatedPath(Donate, pointer _value)
 	:value(_value) {
 	g_free(_value);
 }
 
+#endif
+
 /* no inlining, please */
 AllocatedPath::~AllocatedPath() {}
 
 AllocatedPath
-AllocatedPath::Build(const_pointer a, const_pointer b)
-{
-	return AllocatedPath(Donate(), g_build_filename(a, b, nullptr));
-}
-
-AllocatedPath
 AllocatedPath::FromUTF8(const char *path_utf8)
 {
+#ifdef HAVE_GLIB
 	return AllocatedPath(Donate(), ::PathFromUTF8(path_utf8));
+#else
+	return FromFS(path_utf8);
+#endif
 }
 
 AllocatedPath
@@ -64,7 +67,7 @@ AllocatedPath::FromUTF8(const char *path_utf8, Error &error)
 AllocatedPath
 AllocatedPath::GetDirectoryName() const
 {
-	return AllocatedPath(Donate(), g_path_get_dirname(c_str()));
+	return FromFS(PathTraitsFS::GetParent(c_str()));
 }
 
 std::string
@@ -82,14 +85,14 @@ AllocatedPath::RelativeFS(const char *other_fs) const
 
 	other_fs += l;
 	if (*other_fs != 0) {
-		if (!PathTraits::IsSeparatorFS(*other_fs))
+		if (!PathTraitsFS::IsSeparator(*other_fs))
 			/* mismatch */
 			return nullptr;
 
 		/* skip remaining path separators */
 		do {
 			++other_fs;
-		} while (PathTraits::IsSeparatorFS(*other_fs));
+		} while (PathTraitsFS::IsSeparator(*other_fs));
 	}
 
 	return other_fs;
@@ -101,7 +104,7 @@ AllocatedPath::ChopSeparators()
 	size_t l = length();
 	const char *p = data();
 
-	while (l >= 2 && PathTraits::IsSeparatorFS(p[l - 1])) {
+	while (l >= 2 && PathTraitsFS::IsSeparator(p[l - 1])) {
 		--l;
 
 #if GCC_CHECK_VERSION(4,7) && !defined(__clang__)
diff --git a/src/fs/AllocatedPath.hxx b/src/fs/AllocatedPath.hxx
index 36d8a1598..4fb217547 100644
--- a/src/fs/AllocatedPath.hxx
+++ b/src/fs/AllocatedPath.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -28,8 +28,6 @@
 #include <utility>
 #include <string>
 
-#include <assert.h>
-
 class Error;
 
 /**
@@ -39,11 +37,10 @@ class Error;
  * stored.
  */
 class AllocatedPath {
-	typedef std::string string;
-
-	typedef PathTraits::value_type value_type;
-	typedef PathTraits::pointer pointer;
-	typedef PathTraits::const_pointer const_pointer;
+	typedef PathTraitsFS::string string;
+	typedef PathTraitsFS::value_type value_type;
+	typedef PathTraitsFS::pointer pointer;
+	typedef PathTraitsFS::const_pointer const_pointer;
 
 	string value;
 
@@ -56,6 +53,12 @@ class AllocatedPath {
 
 	AllocatedPath(const_pointer _value):value(_value) {}
 
+	AllocatedPath(string &&_value):value(std::move(_value)) {}
+
+	static AllocatedPath Build(const_pointer a, size_t a_size,
+				   const_pointer b, size_t b_size) {
+		return AllocatedPath(PathTraitsFS::Build(a, a_size, b, b_size));
+	}
 public:
 	/**
 	 * Copy a #AllocatedPath object.
@@ -67,6 +70,8 @@ public:
 	 */
 	AllocatedPath(AllocatedPath &&other):value(std::move(other.value)) {}
 
+	explicit AllocatedPath(Path other):value(other.c_str()) {}
+
 	~AllocatedPath();
 
 	/**
@@ -89,22 +94,38 @@ public:
 	 * Join two path components with the path separator.
 	 */
 	gcc_pure gcc_nonnull_all
-	static AllocatedPath Build(const_pointer a, const_pointer b);
+	static AllocatedPath Build(const_pointer a, const_pointer b) {
+		return Build(a, PathTraitsFS::GetLength(a),
+			     b, PathTraitsFS::GetLength(b));
+	}
 
 	gcc_pure gcc_nonnull_all
-	static AllocatedPath Build(const_pointer a, const AllocatedPath &b) {
+	static AllocatedPath Build(Path a, const_pointer b) {
+		return Build(a.c_str(), b);
+	}
+
+	gcc_pure gcc_nonnull_all
+	static AllocatedPath Build(Path a, Path b) {
 		return Build(a, b.c_str());
 	}
 
 	gcc_pure gcc_nonnull_all
+	static AllocatedPath Build(const_pointer a, const AllocatedPath &b) {
+		return Build(a, PathTraitsFS::GetLength(a),
+			     b.value.c_str(), b.value.size());
+	}
+
+	gcc_pure gcc_nonnull_all
 	static AllocatedPath Build(const AllocatedPath &a, const_pointer b) {
-		return Build(a.c_str(), b);
+		return Build(a.value.c_str(), a.value.size(),
+			     b, PathTraitsFS::GetLength(b));
 	}
 
 	gcc_pure
 	static AllocatedPath Build(const AllocatedPath &a,
 				   const AllocatedPath &b) {
-		return Build(a.c_str(), b.c_str());
+		return Build(a.value.c_str(), a.value.size(),
+			     b.value.c_str(), b.value.size());
 	}
 
 	/**
@@ -117,6 +138,15 @@ public:
 	}
 
 	/**
+	 * Convert a C++ string that is already in the filesystem
+	 * character set to a #Path instance.
+	 */
+	gcc_pure
+	static AllocatedPath FromFS(string &&fs) {
+		return AllocatedPath(std::move(fs));
+	}
+
+	/**
 	 * Convert a UTF-8 C string to a #AllocatedPath instance.
 	 * Returns return a "nulled" instance on error.
 	 */
@@ -215,7 +245,7 @@ public:
 
 	gcc_pure
 	bool IsAbsolute() {
-		return PathTraits::IsAbsoluteFS(c_str());
+		return PathTraitsFS::IsAbsolute(c_str());
 	}
 };
 
diff --git a/src/fs/Charset.cxx b/src/fs/Charset.cxx
index dad5779f9..232a9a23c 100644
--- a/src/fs/Charset.cxx
+++ b/src/fs/Charset.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -22,11 +22,14 @@
 #include "Domain.hxx"
 #include "Limits.hxx"
 #include "system/FatalError.hxx"
-#include "util/Error.hxx"
-#include "util/Domain.hxx"
 #include "Log.hxx"
+#include "Traits.hxx"
 
+#ifdef HAVE_GLIB
 #include <glib.h>
+#endif
+
+#include <algorithm>
 
 #include <assert.h>
 #include <string.h>
@@ -41,6 +44,7 @@
  */
 static constexpr size_t MPD_PATH_MAX_UTF8 = (MPD_PATH_MAX - 1) * 4 + 1;
 
+#ifdef HAVE_GLIB
 static std::string fs_charset;
 
 gcc_pure
@@ -70,10 +74,29 @@ SetFSCharset(const char *charset)
 		    "SetFSCharset: fs charset is: %s", fs_charset.c_str());
 }
 
+#endif
+
 const char *
 GetFSCharset()
 {
+#ifdef HAVE_GLIB
 	return fs_charset.empty() ? "utf-8" : fs_charset.c_str();
+#else
+	return "utf-8";
+#endif
+}
+
+static inline void FixSeparators(std::string &s)
+{
+#ifdef WIN32
+	// For whatever reason GCC can't convert constexpr to value reference.
+	// This leads to link errors when passing separators directly.
+	auto from = PathTraitsFS::SEPARATOR;
+	auto to = PathTraitsUTF8::SEPARATOR;
+	std::replace(s.begin(), s.end(), from, to);
+#else
+	(void)s;
+#endif
 }
 
 std::string
@@ -81,8 +104,14 @@ PathToUTF8(const char *path_fs)
 {
 	assert(path_fs != nullptr);
 
-	if (fs_charset.empty())
-		return std::string(path_fs);
+#ifdef HAVE_GLIB
+	if (fs_charset.empty()) {
+#endif
+		auto result = std::string(path_fs);
+		FixSeparators(result);
+		return result;
+#ifdef HAVE_GLIB
+	}
 
 	GIConv conv = g_iconv_open("utf-8", fs_charset.c_str());
 	if (conv == reinterpret_cast<GIConv>(-1))
@@ -103,9 +132,14 @@ PathToUTF8(const char *path_fs)
 	if (ret == static_cast<size_t>(-1) || in_left > 0)
 		return std::string();
 
-	return std::string(path_utf8, sizeof(path_utf8) - out_left);
+	auto result_path = std::string(path_utf8, sizeof(path_utf8) - out_left);
+	FixSeparators(result_path);
+	return result_path;
+#endif
 }
 
+#ifdef HAVE_GLIB
+
 char *
 PathFromUTF8(const char *path_utf8)
 {
@@ -118,3 +152,5 @@ PathFromUTF8(const char *path_utf8)
 			 fs_charset.c_str(), "utf-8",
 			 nullptr, nullptr, nullptr);
 }
+
+#endif
diff --git a/src/fs/Charset.hxx b/src/fs/Charset.hxx
index a89cb0459..0a71d7c58 100644
--- a/src/fs/Charset.hxx
+++ b/src/fs/Charset.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/CheckFile.cxx b/src/fs/CheckFile.cxx
new file mode 100644
index 000000000..a35443674
--- /dev/null
+++ b/src/fs/CheckFile.cxx
@@ -0,0 +1,62 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "CheckFile.hxx"
+#include "Log.hxx"
+#include "config/ConfigError.hxx"
+#include "FileSystem.hxx"
+#include "Path.hxx"
+#include "AllocatedPath.hxx"
+#include "DirectoryReader.hxx"
+
+#include <errno.h>
+#include <sys/stat.h>
+
+void
+CheckDirectoryReadable(Path path_fs)
+{
+	struct stat st;
+	if (!StatFile(path_fs, st)) {
+		FormatErrno(config_domain,
+			    "Failed to stat directory \"%s\"",
+			    path_fs.c_str());
+		return;
+	}
+
+	if (!S_ISDIR(st.st_mode)) {
+		FormatError(config_domain,
+			    "Not a directory: %s", path_fs.c_str());
+		return;
+	}
+
+#ifndef WIN32
+	const auto x = AllocatedPath::Build(path_fs, ".");
+	if (!StatFile(x, st) && errno == EACCES)
+		FormatError(config_domain,
+			    "No permission to traverse (\"execute\") directory: %s",
+			    path_fs.c_str());
+#endif
+
+	const DirectoryReader reader(path_fs);
+	if (reader.HasFailed() && errno == EACCES)
+		FormatError(config_domain,
+			    "No permission to read directory: %s", path_fs.c_str());
+
+}
diff --git a/src/fs/CheckFile.hxx b/src/fs/CheckFile.hxx
new file mode 100644
index 000000000..00559647d
--- /dev/null
+++ b/src/fs/CheckFile.hxx
@@ -0,0 +1,34 @@
+/*
+ * 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_FS_CHECK_FILE_HXX
+#define MPD_FS_CHECK_FILE_HXX
+
+#include "check.h"
+
+class Path;
+
+/**
+ * Check whether the directory is readable and usable.  Logs a warning
+ * if there is a problem.
+ */
+void
+CheckDirectoryReadable(Path path_fs);
+
+#endif
diff --git a/src/fs/Config.cxx b/src/fs/Config.cxx
index 63e64ef99..6aa23005c 100644
--- a/src/fs/Config.cxx
+++ b/src/fs/Config.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -20,24 +20,19 @@
 #include "config.h"
 #include "Config.hxx"
 #include "Charset.hxx"
-#include "Domain.hxx"
-#include "ConfigGlobal.hxx"
-#include "Log.hxx"
-#include "Compiler.h"
-
-#include <glib.h>
-
-#include <assert.h>
-#include <string.h>
+#include "config/ConfigGlobal.hxx"
 
 #ifdef WIN32
 #include <windows.h> // for GetACP()
 #include <stdio.h> // for sprintf()
+#elif defined(HAVE_GLIB)
+#include <glib.h>
 #endif
 
 void
 ConfigureFS()
 {
+#if defined(HAVE_GLIB) || defined(WIN32)
 	const char *charset = nullptr;
 
 	charset = config_get_string(CONF_FS_CHARSET, nullptr);
@@ -62,4 +57,5 @@ ConfigureFS()
 
 	if (charset != nullptr)
 		SetFSCharset(charset);
+#endif
 }
diff --git a/src/fs/Config.hxx b/src/fs/Config.hxx
index 9d7035706..d4f1709f5 100644
--- a/src/fs/Config.hxx
+++ b/src/fs/Config.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/DirectoryReader.hxx b/src/fs/DirectoryReader.hxx
index c9d2c04b8..f77c0629f 100644
--- a/src/fs/DirectoryReader.hxx
+++ b/src/fs/DirectoryReader.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -21,7 +21,7 @@
 #define MPD_FS_DIRECTORY_READER_HXX
 
 #include "check.h"
-#include "AllocatedPath.hxx"
+#include "Path.hxx"
 
 #include <dirent.h>
 
@@ -78,9 +78,9 @@ public:
 	/**
 	 * Extracts directory entry that was previously read by #ReadEntry.
 	 */
-	AllocatedPath GetEntry() const {
+	Path GetEntry() const {
 		assert(HasEntry());
-		return AllocatedPath::FromFS(ent->d_name);
+		return Path::FromFS(ent->d_name);
 	}
 };
 
diff --git a/src/fs/Domain.cxx b/src/fs/Domain.cxx
index 0877bca4c..4f3129219 100644
--- a/src/fs/Domain.cxx
+++ b/src/fs/Domain.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/Domain.hxx b/src/fs/Domain.hxx
index b303570fc..1fd17b37f 100644
--- a/src/fs/Domain.hxx
+++ b/src/fs/Domain.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/FileSystem.cxx b/src/fs/FileSystem.cxx
index 4cd9f33b2..4e7c87415 100644
--- a/src/fs/FileSystem.cxx
+++ b/src/fs/FileSystem.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/FileSystem.hxx b/src/fs/FileSystem.hxx
index cb2f82d22..4dbb064cb 100644
--- a/src/fs/FileSystem.hxx
+++ b/src/fs/FileSystem.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -28,7 +28,6 @@
 
 #include <sys/stat.h>
 #include <unistd.h>
-#include <assert.h>
 #include <stdio.h>
 
 class AllocatedPath;
@@ -37,39 +36,39 @@ namespace FOpenMode {
 	/**
 	 * Open mode for reading text files.
 	 */
-	constexpr PathTraits::const_pointer ReadText = "r";
+	constexpr PathTraitsFS::const_pointer ReadText = "r";
 
 	/**
 	 * Open mode for reading binary files.
 	 */
-	constexpr PathTraits::const_pointer ReadBinary = "rb";
+	constexpr PathTraitsFS::const_pointer ReadBinary = "rb";
 
 	/**
 	 * Open mode for writing text files.
 	 */
-	constexpr PathTraits::const_pointer WriteText = "w";
+	constexpr PathTraitsFS::const_pointer WriteText = "w";
 
 	/**
 	 * Open mode for writing binary files.
 	 */
-	constexpr PathTraits::const_pointer WriteBinary = "wb";
+	constexpr PathTraitsFS::const_pointer WriteBinary = "wb";
 
 	/**
 	 * Open mode for appending text files.
 	 */
-	constexpr PathTraits::const_pointer AppendText = "a";
+	constexpr PathTraitsFS::const_pointer AppendText = "a";
 
 	/**
 	 * Open mode for appending binary files.
 	 */
-	constexpr PathTraits::const_pointer AppendBinary = "ab";
+	constexpr PathTraitsFS::const_pointer AppendBinary = "ab";
 }
 
 /**
  * Wrapper for fopen() that uses #Path names.
  */
 static inline FILE *
-FOpen(Path file, PathTraits::const_pointer mode)
+FOpen(Path file, PathTraitsFS::const_pointer mode)
 {
 	return fopen(file.c_str(), mode);
 }
@@ -132,20 +131,28 @@ MakeFifo(Path path, mode_t mode)
 	return mkfifo(path.c_str(), mode) == 0;
 }
 
-#endif
-
 /**
  * Wrapper for access() that uses #Path names.
  */
 static inline bool
 CheckAccess(Path path, int mode)
 {
+	return access(path.c_str(), mode) == 0;
+}
+
+#endif
+
+/**
+ * Checks is specified path exists and accessible.
+ */
+static inline bool
+CheckAccess(Path path)
+{
 #ifdef WIN32
-	(void)path;
-	(void)mode;
-	return true;
+	struct stat buf;
+	return StatFile(path, buf);
 #else
-	return access(path.c_str(), mode) == 0;
+	return CheckAccess(path, F_OK);
 #endif
 }
 
diff --git a/src/fs/Limits.hxx b/src/fs/Limits.hxx
index 480b08851..432897a69 100644
--- a/src/fs/Limits.hxx
+++ b/src/fs/Limits.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
diff --git a/src/fs/Path.cxx b/src/fs/Path.cxx
index 0ff0591fb..8288a4fec 100644
--- a/src/fs/Path.cxx
+++ b/src/fs/Path.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -26,25 +26,3 @@ Path::ToUTF8() const
 {
 	return ::PathToUTF8(c_str());
 }
-
-const char *
-Path::RelativeFS(const char *other_fs) const
-{
-	const size_t l = length();
-	if (memcmp(data(), other_fs, l) != 0)
-		return nullptr;
-
-	other_fs += l;
-	if (*other_fs != 0) {
-		if (!PathTraits::IsSeparatorFS(*other_fs))
-			/* mismatch */
-			return nullptr;
-
-		/* skip remaining path separators */
-		do {
-			++other_fs;
-		} while (PathTraits::IsSeparatorFS(*other_fs));
-	}
-
-	return other_fs;
-}
diff --git a/src/fs/Path.hxx b/src/fs/Path.hxx
index 6ea954577..9e0fa5aeb 100644
--- a/src/fs/Path.hxx
+++ b/src/fs/Path.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -29,8 +29,6 @@
 #include <assert.h>
 #include <string.h>
 
-class Error;
-
 /**
  * A path name in the native file system character set.
  *
@@ -38,9 +36,9 @@ class Error;
  * instance lives, the string must not be invalidated.
  */
 class Path {
-	typedef PathTraits::value_type value_type;
-	typedef PathTraits::pointer pointer;
-	typedef PathTraits::const_pointer const_pointer;
+	typedef PathTraitsFS::value_type value_type;
+	typedef PathTraitsFS::pointer pointer;
+	typedef PathTraitsFS::const_pointer const_pointer;
 
 	const char *value;
 
@@ -137,11 +135,13 @@ public:
 	 * nullptr on mismatch.
 	 */
 	gcc_pure
-	const char *RelativeFS(const char *other_fs) const;
+	const char *RelativeFS(const char *other_fs) const {
+		return PathTraitsFS::Relative(value, other_fs);
+	}
 
 	gcc_pure
 	bool IsAbsolute() {
-		return PathTraits::IsAbsoluteFS(c_str());
+		return PathTraitsFS::IsAbsolute(c_str());
 	}
 };
 
diff --git a/src/fs/StandardDirectory.cxx b/src/fs/StandardDirectory.cxx
new file mode 100644
index 000000000..4f0958995
--- /dev/null
+++ b/src/fs/StandardDirectory.cxx
@@ -0,0 +1,294 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+
+// Use X Desktop guidelines where applicable
+#if !defined(__APPLE__) && !defined(WIN32)
+#define USE_XDG
+#endif
+
+#include "StandardDirectory.hxx"
+#include "FileSystem.hxx"
+
+#include <array>
+
+#ifdef WIN32
+#include <windows.h>
+#include <shlobj.h>
+#else
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <pwd.h>
+#endif
+
+#ifdef USE_XDG
+#include "util/CharUtil.hxx"
+#include "util/StringUtil.hxx"
+#include "TextFile.hxx"
+#include <string.h>
+#include <utility>
+#endif
+
+#ifndef WIN32
+class PasswdEntry
+{
+#if defined(HAVE_GETPWNAM_R) || defined(HAVE_GETPWUID_R)
+	std::array<char, 16 * 1024> buf;
+	passwd pw;
+#endif
+
+	passwd *result;
+public:
+	PasswdEntry() : result(nullptr) { }
+
+	bool ReadByName(const char *name) {
+#ifdef HAVE_GETPWNAM_R
+		getpwnam_r(name, &pw, buf.data(), buf.size(), &result);
+#else
+		result = getpwnam(name);
+#endif
+		return result != nullptr;
+	}
+
+	bool ReadByUid(uid_t uid) {
+#ifdef HAVE_GETPWUID_R
+		getpwuid_r(uid, &pw, buf.data(), buf.size(), &result);
+#else
+		result = getpwuid(uid);
+#endif
+		return result != nullptr;
+	}
+
+	const passwd *operator->() {
+		assert(result != nullptr);
+		return result;
+	}
+};
+#endif
+
+static inline bool IsValidPathString(PathTraitsFS::const_pointer path)
+{
+	return path != nullptr && *path != '\0';
+}
+
+static inline bool IsValidDir(PathTraitsFS::const_pointer dir)
+{
+	return PathTraitsFS::IsAbsolute(dir) &&
+	       DirectoryExists(Path::FromFS(dir));
+}
+
+static inline AllocatedPath SafePathFromFS(PathTraitsFS::const_pointer dir)
+{
+	if (IsValidPathString(dir) && IsValidDir(dir))
+		return AllocatedPath::FromFS(dir);
+	return AllocatedPath::Null();
+}
+
+#ifdef WIN32
+static AllocatedPath GetStandardDir(int folder_id)
+{
+	std::array<char, MAX_PATH> dir;
+	auto ret = SHGetFolderPath(nullptr, folder_id | CSIDL_FLAG_DONT_VERIFY,
+				   nullptr, SHGFP_TYPE_CURRENT, dir.data());
+	if (FAILED(ret))
+		return AllocatedPath::Null();
+	return SafePathFromFS(dir.data());
+}
+#endif
+
+#ifdef USE_XDG
+
+static const char home_prefix[] = "$HOME/";
+
+static bool ParseConfigLine(const char *line, const char *dir_name,
+			    AllocatedPath &result_dir)
+{
+	// strip leading white space
+	line = strchug_fast(line);
+
+	// check for end-of-line or comment
+	if (*line == '\0' || *line == '#')
+		return false;
+
+	// check if current setting is for requested dir
+	if (!StringStartsWith(line, dir_name))
+		return false;
+	line += strlen(dir_name);
+
+	// strip equals sign and spaces around it
+	line = strchug_fast(line);
+	if (*line != '=')
+		return false;
+	++line;
+	line = strchug_fast(line);
+
+	// check if path is quoted
+	bool quoted = false;
+	if (*line == '"') {
+		++line;
+		quoted = true;
+	}
+
+	// check if path is relative to $HOME
+	bool home_relative = false;
+	if (StringStartsWith(line, home_prefix)) {
+		line += strlen(home_prefix);
+		home_relative = true;
+	}
+
+
+	const char *line_end;
+	// find end of the string
+	if (quoted) {
+		line_end = strrchr(line, '"');
+		if (line_end == nullptr)
+			return true;
+	} else {
+		line_end = line + strlen(line);
+		while (line < line_end && IsWhitespaceNotNull(line_end[-1]))
+			--line_end;
+	}
+
+	// check for empty result
+	if (line == line_end)
+		return true;
+
+	// build the result path	
+	std::string path(line, line_end);
+
+	auto result = AllocatedPath::Null();
+	if (home_relative) {
+		auto home = GetHomeDir();
+		if (home.IsNull())
+			return true;
+		result = AllocatedPath::Build(home, path.c_str());
+	} else {
+		result = AllocatedPath::FromFS(std::move(path));
+	}
+
+	if (IsValidDir(result.c_str())) {
+		result_dir = std::move(result);
+		return true;
+	}
+	return true;
+}
+
+static AllocatedPath GetUserDir(const char *name)
+{
+	auto result = AllocatedPath::Null();
+	auto config_dir = GetUserConfigDir();
+	if (config_dir.IsNull())
+		return result;
+	auto dirs_file = AllocatedPath::Build(config_dir, "user-dirs.dirs");
+	TextFile input(dirs_file);
+	if (input.HasFailed())
+		return result;
+	const char *line;
+	while ((line = input.ReadLine()) != nullptr)
+		if (ParseConfigLine(line, name, result))
+			return result;
+	return result;
+}
+
+#endif
+
+AllocatedPath GetUserConfigDir()
+{
+#if defined(WIN32)
+	return GetStandardDir(CSIDL_LOCAL_APPDATA);
+#elif defined(USE_XDG)
+	// Check for $XDG_CONFIG_HOME
+	auto config_home = getenv("XDG_CONFIG_HOME");
+	if (IsValidPathString(config_home) && IsValidDir(config_home))
+		return AllocatedPath::FromFS(config_home);
+
+	// Check for $HOME/.config
+	auto home = GetHomeDir();
+	if (!home.IsNull()) {
+		AllocatedPath fallback = AllocatedPath::Build(home, ".config");
+		if (IsValidDir(fallback.c_str()))
+			return fallback;
+	}
+
+	return AllocatedPath::Null();
+#else
+	return AllocatedPath::Null();
+#endif
+}
+
+AllocatedPath GetUserMusicDir()
+{
+#if defined(WIN32)
+	return GetStandardDir(CSIDL_MYMUSIC);	
+#elif defined(USE_XDG)
+	return GetUserDir("XDG_MUSIC_DIR");
+#else
+	return AllocatedPath::Null();
+#endif
+}
+
+#ifdef WIN32
+
+AllocatedPath GetSystemConfigDir()
+{
+	return GetStandardDir(CSIDL_COMMON_APPDATA);
+}
+
+AllocatedPath GetAppBaseDir()
+{
+	std::array<char, MAX_PATH> app;
+	auto ret = GetModuleFileName(nullptr, app.data(), app.size());
+
+	// Check for error
+	if (ret == 0)
+		return AllocatedPath::Null();
+
+	// Check for truncation
+	if (ret == app.size() && GetLastError() == ERROR_INSUFFICIENT_BUFFER)
+		return AllocatedPath::Null();
+
+	auto app_path = AllocatedPath::FromFS(app.data());
+	return app_path.GetDirectoryName().GetDirectoryName();
+}
+
+#else
+
+AllocatedPath GetHomeDir()
+{
+	auto home = getenv("HOME");
+	if (IsValidPathString(home) && IsValidDir(home))
+		return AllocatedPath::FromFS(home);
+	PasswdEntry pw;
+	if (pw.ReadByUid(getuid()))
+		return SafePathFromFS(pw->pw_dir);
+	return AllocatedPath::Null();
+}
+
+AllocatedPath GetHomeDir(const char *user_name)
+{
+	assert(user_name != nullptr);
+	PasswdEntry pw;
+	if (pw.ReadByName(user_name))
+		return SafePathFromFS(pw->pw_dir);
+	return AllocatedPath::Null();
+}
+
+#endif
diff --git a/src/fs/StandardDirectory.hxx b/src/fs/StandardDirectory.hxx
new file mode 100644
index 000000000..dca35b486
--- /dev/null
+++ b/src/fs/StandardDirectory.hxx
@@ -0,0 +1,64 @@
+/*
+ * 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_FS_STANDARD_DIRECTORY_HXX
+#define MPD_FS_STANDARD_DIRECTORY_HXX
+
+#include "check.h"
+#include "AllocatedPath.hxx"
+
+/**
+ * Obtains configuration directory for the current user.
+ */
+AllocatedPath GetUserConfigDir();
+
+/**
+ * Obtains music directory for the current user.
+ */
+AllocatedPath GetUserMusicDir();
+
+#ifdef WIN32
+
+/**
+ * Obtains system configuration directory.
+ */
+AllocatedPath GetSystemConfigDir();
+
+/**
+ * Obtains application application base directory.
+ * Application base directory is a directory that contains 'bin' folder
+ * for current executable.
+ */
+AllocatedPath GetAppBaseDir();
+
+#else
+
+/**
+ * Obtains home directory for the current user.
+ */
+AllocatedPath GetHomeDir();
+
+/**
+ * Obtains home directory for the specified user.
+ */
+AllocatedPath GetHomeDir(const char *user_name);
+
+#endif
+
+#endif
diff --git a/src/fs/TextFile.cxx b/src/fs/TextFile.cxx
new file mode 100644
index 000000000..b1a92b9cc
--- /dev/null
+++ b/src/fs/TextFile.cxx
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "TextFile.hxx"
+#include "util/Alloc.hxx"
+#include "fs/Path.hxx"
+#include "fs/FileSystem.hxx"
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+TextFile::TextFile(Path path_fs)
+	:file(FOpen(path_fs, FOpenMode::ReadText)),
+	 buffer((char *)xalloc(step)), capacity(step), length(0) {}
+
+TextFile::~TextFile()
+{
+	free(buffer);
+
+	if (file != nullptr)
+		fclose(file);
+}
+
+char *
+TextFile::ReadLine()
+{
+	assert(file != nullptr);
+
+	while (true) {
+		if (length >= capacity) {
+			if (capacity >= max_length)
+				/* too large already - bail out */
+				return nullptr;
+
+			capacity <<= 1;
+			char *new_buffer = (char *)realloc(buffer, capacity);
+			if (new_buffer == nullptr)
+				/* out of memory - bail out */
+				return nullptr;
+		}
+
+		char *p = fgets(buffer + length, capacity - length, file);
+		if (p == nullptr) {
+			if (length == 0 || ferror(file))
+				return nullptr;
+			break;
+		}
+
+		length += strlen(buffer + length);
+		if (buffer[length - 1] == '\n')
+			break;
+	}
+
+	/* remove the newline characters */
+	if (buffer[length - 1] == '\n')
+		--length;
+	if (buffer[length - 1] == '\r')
+		--length;
+
+	buffer[length] = 0;
+	length = 0;
+	return buffer;
+}
diff --git a/src/fs/TextFile.hxx b/src/fs/TextFile.hxx
new file mode 100644
index 000000000..e3a712a88
--- /dev/null
+++ b/src/fs/TextFile.hxx
@@ -0,0 +1,62 @@
+/*
+ * 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_TEXT_FILE_HXX
+#define MPD_TEXT_FILE_HXX
+
+#include "Compiler.h"
+
+#include <stdio.h>
+#include <stddef.h>
+
+class Path;
+
+class TextFile {
+	static constexpr size_t max_length = 512 * 1024;
+	static constexpr size_t step = 1024;
+
+	FILE *const file;
+
+	char *buffer;
+	size_t capacity, length;
+
+public:
+	TextFile(Path path_fs);
+
+	TextFile(const TextFile &other) = delete;
+
+	~TextFile();
+
+	bool HasFailed() const {
+		return gcc_unlikely(file == nullptr);
+	}
+
+	/**
+	 * Reads a line from the input file, and strips trailing
+	 * space.  There is a reasonable maximum line length, only to
+	 * prevent denial of service.
+	 *
+	 * @param file the source file, opened in text mode
+	 * @param buffer an allocator for the buffer
+	 * @return a pointer to the line, or nullptr on end-of-file or error
+	 */
+	char *ReadLine();
+};
+
+#endif
diff --git a/src/fs/Traits.cxx b/src/fs/Traits.cxx
index 2c3ce075b..d62987087 100644
--- a/src/fs/Traits.cxx
+++ b/src/fs/Traits.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -22,24 +22,136 @@
 
 #include <string.h>
 
-const char *
-PathTraits::GetBaseUTF8(const char *p)
+template<typename Traits>
+typename Traits::string
+BuildPathImpl(typename Traits::const_pointer a, size_t a_size,
+	      typename Traits::const_pointer b, size_t b_size)
+{
+	assert(a != nullptr);
+	assert(b != nullptr);
+
+	if (a_size == 0)
+		return typename Traits::string(b, b_size);
+	if (b_size == 0)
+		return typename Traits::string(a, a_size);
+
+	typename Traits::string result(a, a_size);
+
+	if (!Traits::IsSeparator(a[a_size - 1]))
+		result.push_back(Traits::SEPARATOR);
+
+	if (Traits::IsSeparator(b[0]))
+		result.append(b + 1, b_size - 1);
+	else
+		result.append(b, b_size);
+
+	return result;
+}
+
+template<typename Traits>
+typename Traits::const_pointer
+GetBasePathImpl(typename Traits::const_pointer p)
 {
 	assert(p != nullptr);
 
-	const char *slash = strrchr(p, SEPARATOR_UTF8);
-	return slash != nullptr
-		? slash + 1
+	typename Traits::const_pointer sep = Traits::FindLastSeparator(p);
+	return sep != nullptr
+		? sep + 1
 		: p;
 }
 
-std::string
-PathTraits::GetParentUTF8(const char *p)
+template<typename Traits>
+typename Traits::string
+GetParentPathImpl(typename Traits::const_pointer p)
 {
 	assert(p != nullptr);
 
-	const char *slash = strrchr(p, SEPARATOR_UTF8);
-	return slash != nullptr
-		? std::string(p, slash)
-		: std::string(".");
+	typename Traits::const_pointer sep = Traits::FindLastSeparator(p);
+	if (sep == nullptr)
+		return typename Traits::string(".");
+	if (sep == p)
+		return typename Traits::string(p, p + 1);
+#ifdef WIN32
+	if (Traits::IsDrive(p) && sep == p + 2)
+		return typename Traits::string(p, p + 3);
+#endif
+	return typename Traits::string(p, sep);
+}
+
+template<typename Traits>
+typename Traits::const_pointer
+RelativePathImpl(typename Traits::const_pointer base,
+		 typename Traits::const_pointer other)
+{
+	assert(base != nullptr);
+	assert(other != nullptr);
+
+	const auto base_length = Traits::GetLength(base);
+	if (memcmp(base, other, base_length * sizeof(*base)) != 0)
+		/* mismatch */
+		return nullptr;
+
+	other += base_length;
+	if (other != 0) {
+		if (!Traits::IsSeparator(*other))
+			/* mismatch */
+			return nullptr;
+
+		/* skip remaining path separators */
+		do {
+			++other;
+		} while (Traits::IsSeparator(*other));
+	}
+
+	return other;
+}
+
+PathTraitsFS::string
+PathTraitsFS::Build(PathTraitsFS::const_pointer a, size_t a_size,
+		    PathTraitsFS::const_pointer b, size_t b_size)
+{
+	return BuildPathImpl<PathTraitsFS>(a, a_size, b, b_size);
+}
+
+PathTraitsFS::const_pointer
+PathTraitsFS::GetBase(PathTraitsFS::const_pointer p)
+{
+	return GetBasePathImpl<PathTraitsFS>(p);
+}
+
+PathTraitsFS::string
+PathTraitsFS::GetParent(PathTraitsFS::const_pointer p)
+{
+	return GetParentPathImpl<PathTraitsFS>(p);
+}
+
+PathTraitsFS::const_pointer
+PathTraitsFS::Relative(const_pointer base, const_pointer other)
+{
+	return RelativePathImpl<PathTraitsFS>(base, other);
+}
+
+PathTraitsUTF8::string
+PathTraitsUTF8::Build(PathTraitsUTF8::const_pointer a, size_t a_size,
+		      PathTraitsUTF8::const_pointer b, size_t b_size)
+{
+	return BuildPathImpl<PathTraitsUTF8>(a, a_size, b, b_size);
+}
+
+PathTraitsUTF8::const_pointer
+PathTraitsUTF8::GetBase(PathTraitsUTF8::const_pointer p)
+{
+	return GetBasePathImpl<PathTraitsUTF8>(p);
+}
+
+PathTraitsUTF8::string
+PathTraitsUTF8::GetParent(PathTraitsUTF8::const_pointer p)
+{
+	return GetParentPathImpl<PathTraitsUTF8>(p);
+}
+
+PathTraitsUTF8::const_pointer
+PathTraitsUTF8::Relative(const_pointer base, const_pointer other)
+{
+	return RelativePathImpl<PathTraitsUTF8>(base, other);
 }
diff --git a/src/fs/Traits.hxx b/src/fs/Traits.hxx
index 244ab8b5c..88715c3e8 100644
--- a/src/fs/Traits.hxx
+++ b/src/fs/Traits.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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
@@ -24,67 +24,153 @@
 #include "Compiler.h"
 
 #ifdef WIN32
-#include <glib.h>
+#include "util/CharUtil.hxx"
 #endif
 
 #include <string>
 
+#include <string.h>
 #include <assert.h>
 
-class Error;
-
 /**
- * This class describes the nature of a filesystem path.
+ * This class describes the nature of a native filesystem path.
  */
-struct PathTraits {
+struct PathTraitsFS {
+	typedef std::string string;
 	typedef char value_type;
 	typedef char *pointer;
 	typedef const char *const_pointer;
 
 #ifdef WIN32
-	static constexpr value_type SEPARATOR_FS = '\\';
-	static constexpr char SEPARATOR_UTF8 = '/';
+	static constexpr value_type SEPARATOR = '\\';
 #else
-	static constexpr value_type SEPARATOR_FS = '/';
-	static constexpr char SEPARATOR_UTF8 = '/';
+	static constexpr value_type SEPARATOR = '/';
 #endif
 
-	static constexpr bool IsSeparatorFS(value_type ch) {
+	static constexpr bool IsSeparator(value_type ch) {
 		return
 #ifdef WIN32
 			ch == '/' ||
 #endif
-			ch == SEPARATOR_FS;
+			ch == SEPARATOR;
 	}
 
-	static constexpr bool IsSeparatorUTF8(char ch) {
-		return
+	gcc_pure gcc_nonnull_all
+	static const_pointer FindLastSeparator(const_pointer p) {
+		assert(p != nullptr);
 #ifdef WIN32
-			ch == '/' ||
+		const_pointer pos = p + GetLength(p);
+		while (p != pos && !IsSeparator(*pos))
+			--pos;
+		return IsSeparator(*pos) ? pos : nullptr;
+#else
+		return strrchr(p, SEPARATOR);
 #endif
-			ch == SEPARATOR_UTF8;
 	}
 
-	gcc_pure
-	static bool IsAbsoluteFS(const_pointer p) {
-		assert(p != nullptr);
+#ifdef WIN32
+	gcc_pure gcc_nonnull_all
+	static constexpr bool IsDrive(const_pointer p) {
+		return IsAlphaASCII(p[0]) && p[1] == ':';
+	}
+#endif
 
+	gcc_pure gcc_nonnull_all
+	static bool IsAbsolute(const_pointer p) {
+		assert(p != nullptr);
 #ifdef WIN32
-		return g_path_is_absolute(p);
-#else
-		return IsSeparatorFS(*p);
+		if (IsDrive(p) && IsSeparator(p[2]))
+			return true;
 #endif
+		return IsSeparator(*p);
 	}
 
-	gcc_pure
-	static bool IsAbsoluteUTF8(const char *p) {
+	gcc_pure gcc_nonnull_all
+	static size_t GetLength(const_pointer p) {
+		return strlen(p);
+	}
+
+	/**
+	 * Determine the "base" file name of the given native path.
+	 * The return value points inside the given string.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer GetBase(const_pointer p);
+
+	/**
+	 * Determine the "parent" file name of the given native path.
+	 * As a special case, returns the string "." if there is no
+	 * separator in the given input string.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string GetParent(const_pointer p);
+
+	/**
+	 * Determine the relative part of the given path to this
+	 * object, not including the directory separator.  Returns an
+	 * empty string if the given path equals this object or
+	 * nullptr on mismatch.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer Relative(const_pointer base, const_pointer other);
+
+	/**
+	 * Constructs the path from the given components.
+	 * If either of the components is empty string,
+	 * remaining component is returned unchanged.
+	 * If both components are empty strings, empty string is returned.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, size_t a_size,
+			    const_pointer b, size_t b_size);
+
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, const_pointer b) {
+		return Build(a, GetLength(a), b, GetLength(b));
+	}
+};
+
+/**
+ * This class describes the nature of a MPD internal filesystem path.
+ */
+struct PathTraitsUTF8 {
+	typedef std::string string;
+	typedef char value_type;
+	typedef char *pointer;
+	typedef const char *const_pointer;
+
+	static constexpr value_type SEPARATOR = '/';
+
+	static constexpr bool IsSeparator(value_type ch) {
+		return ch == SEPARATOR;
+	}
+
+	gcc_pure gcc_nonnull_all
+	static const_pointer FindLastSeparator(const_pointer p) {
 		assert(p != nullptr);
+		return strrchr(p, SEPARATOR);
+	}
 
 #ifdef WIN32
-		return g_path_is_absolute(p);
-#else
-		return IsSeparatorUTF8(*p);
+	gcc_pure gcc_nonnull_all
+	static constexpr bool IsDrive(const_pointer p) {
+		return IsAlphaASCII(p[0]) && p[1] == ':';
+	}
+#endif
+
+	gcc_pure gcc_nonnull_all
+	static bool IsAbsolute(const_pointer p) {
+		assert(p != nullptr);
+#ifdef WIN32
+		if (IsDrive(p) && IsSeparator(p[2]))
+			return true;
 #endif
+		return IsSeparator(*p);
+	}
+
+	gcc_pure gcc_nonnull_all
+	static size_t GetLength(const_pointer p) {
+		return strlen(p);
 	}
 
 	/**
@@ -92,7 +178,7 @@ struct PathTraits {
 	 * The return value points inside the given string.
 	 */
 	gcc_pure gcc_nonnull_all
-	static const char *GetBaseUTF8(const char *p);
+	static const_pointer GetBase(const_pointer p);
 
 	/**
 	 * Determine the "parent" file name of the given UTF-8 path.
@@ -100,7 +186,31 @@ struct PathTraits {
 	 * separator in the given input string.
 	 */
 	gcc_pure gcc_nonnull_all
-	static std::string GetParentUTF8(const char *p);
+	static string GetParent(const_pointer p);
+
+	/**
+	 * Determine the relative part of the given path to this
+	 * object, not including the directory separator.  Returns an
+	 * empty string if the given path equals this object or
+	 * nullptr on mismatch.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer Relative(const_pointer base, const_pointer other);
+
+	/**
+	 * Constructs the path from the given components.
+	 * If either of the components is empty string,
+	 * remaining component is returned unchanged.
+	 * If both components are empty strings, empty string is returned.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, size_t a_size,
+			    const_pointer b, size_t b_size);
+
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, const_pointer b) {
+		return Build(a, GetLength(a), b, GetLength(b));
+	}
 };
 
 #endif