fs/Path: rename to AllocatedPath

The new class Path only holds a string pointer without being
responsible for allocation/deallocation.  The FileSystem.hxx library
accepts Path arguments instead of AllocatedPath, to avoid forcing
callers to allocate another string object.

src/Mapper.cxx

@@ -25,7 +25,7 @@
 #include "Mapper.hxx"
 #include "Directory.hxx"
 #include "Song.hxx"
-#include "fs/Path.hxx"
+#include "fs/AllocatedPath.hxx"
 #include "fs/Traits.hxx"
 #include "fs/Charset.hxx"
 #include "fs/FileSystem.hxx"
@@ -52,16 +52,16 @@ static size_t music_dir_utf8_length;
  * The absolute path of the music directory encoded in the filesystem
  * character set.
  */
-static Path music_dir_fs = Path::Null();
+static AllocatedPath music_dir_fs = AllocatedPath::Null();
 
 /**
  * The absolute path of the playlist directory encoded in the
  * filesystem character set.
  */
-static Path playlist_dir_fs = Path::Null();
+static AllocatedPath playlist_dir_fs = AllocatedPath::Null();
 
 static void
-check_directory(const char *path_utf8, const Path &path_fs)
+check_directory(const char *path_utf8, const AllocatedPath &path_fs)
 {
 	struct stat st;
 	if (!StatFile(path_fs, st)) {
@@ -78,7 +78,7 @@ check_directory(const char *path_utf8, const Path &path_fs)
 	}
 
 #ifndef WIN32
-	const Path x = Path::Build(path_fs, ".");
+	const auto x = AllocatedPath::Build(path_fs, ".");
 	if (!StatFile(x, st) && errno == EACCES)
 		FormatError(mapper_domain,
 			    "No permission to traverse (\"execute\") directory: %s",
@@ -92,7 +92,7 @@ check_directory(const char *path_utf8, const Path &path_fs)
 }
 
 static void
-mapper_set_music_dir(Path &&path)
+mapper_set_music_dir(AllocatedPath &&path)
 {
 	assert(!path.IsNull());
 
@@ -106,7 +106,7 @@ mapper_set_music_dir(Path &&path)
 }
 
 static void
-mapper_set_playlist_dir(Path &&path)
+mapper_set_playlist_dir(AllocatedPath &&path)
 {
 	assert(!path.IsNull());
 
@@ -117,7 +117,7 @@ mapper_set_playlist_dir(Path &&path)
 }
 
 void
-mapper_init(Path &&_music_dir, Path &&_playlist_dir)
+mapper_init(AllocatedPath &&_music_dir, AllocatedPath &&_playlist_dir)
 {
 	if (!_music_dir.IsNull())
 		mapper_set_music_dir(std::move(_music_dir));
@@ -136,7 +136,7 @@ mapper_get_music_directory_utf8(void)
 	return music_dir_utf8.c_str();
 }
 
-const Path &
+const AllocatedPath &
 mapper_get_music_directory_fs(void)
 {
 	return music_dir_fs;
@@ -153,23 +153,23 @@ map_to_relative_path(const char *path_utf8)
 		: path_utf8;
 }
 
-Path
+AllocatedPath
 map_uri_fs(const char *uri)
 {
 	assert(uri != NULL);
 	assert(*uri != '/');
 
 	if (music_dir_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	const Path uri_fs = Path::FromUTF8(uri);
+	const auto uri_fs = AllocatedPath::FromUTF8(uri);
 	if (uri_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	return Path::Build(music_dir_fs, uri_fs);
+	return AllocatedPath::Build(music_dir_fs, uri_fs);
 }
 
-Path
+AllocatedPath
 map_directory_fs(const Directory *directory)
 {
 	assert(!music_dir_fs.IsNull());
@@ -180,7 +180,7 @@ map_directory_fs(const Directory *directory)
 	return map_uri_fs(directory->GetPath());
 }
 
-Path
+AllocatedPath
 map_directory_child_fs(const Directory *directory, const char *name)
 {
 	assert(!music_dir_fs.IsNull());
@@ -188,17 +188,17 @@ map_directory_child_fs(const Directory *directory, const char *name)
 	/* check for invalid or unauthorized base names */
 	if (*name == 0 || strchr(name, '/') != NULL ||
 	    strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	const Path parent_fs = map_directory_fs(directory);
+	const auto parent_fs = map_directory_fs(directory);
 	if (parent_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	const Path name_fs = Path::FromUTF8(name);
+	const auto name_fs = AllocatedPath::FromUTF8(name);
 	if (name_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	return Path::Build(parent_fs, name_fs);
+	return AllocatedPath::Build(parent_fs, name_fs);
 }
 
 /**
@@ -206,17 +206,17 @@ map_directory_child_fs(const Directory *directory, const char *name)
  * not have a real parent directory, only the dummy object
  * #detached_root.
  */
-static Path
+static AllocatedPath
 map_detached_song_fs(const char *uri_utf8)
 {
-	Path uri_fs = Path::FromUTF8(uri_utf8);
+	auto uri_fs = AllocatedPath::FromUTF8(uri_utf8);
 	if (uri_fs.IsNull())
-		return Path::Null();
+		return uri_fs;
 
-	return Path::Build(music_dir_fs, uri_fs);
+	return AllocatedPath::Build(music_dir_fs, uri_fs);
 }
 
-Path
+AllocatedPath
 map_song_fs(const Song *song)
 {
 	assert(song->IsFile());
@@ -226,7 +226,7 @@ map_song_fs(const Song *song)
 			? map_detached_song_fs(song->uri)
 			: map_directory_child_fs(song->parent, song->uri);
 	else
-		return Path::FromUTF8(song->uri);
+		return AllocatedPath::FromUTF8(song->uri);
 }
 
 std::string
@@ -241,24 +241,25 @@ map_fs_to_utf8(const char *path_fs)
 	return PathToUTF8(path_fs);
 }
 
-const Path &
+const AllocatedPath &
 map_spl_path(void)
 {
 	return playlist_dir_fs;
 }
 
-Path
+AllocatedPath
 map_spl_utf8_to_fs(const char *name)
 {
 	if (playlist_dir_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
 	std::string filename_utf8 = name;
 	filename_utf8.append(PLAYLIST_FILE_SUFFIX);
 
-	const Path filename_fs = Path::FromUTF8(filename_utf8.c_str());
+	const auto filename_fs =
+		AllocatedPath::FromUTF8(filename_utf8.c_str());
 	if (filename_fs.IsNull())
-		return Path::Null();
+		return AllocatedPath::Null();
 
-	return Path::Build(playlist_dir_fs, filename_fs);
+	return AllocatedPath::Build(playlist_dir_fs, filename_fs);
 }