aboutsummaryrefslogtreecommitdiffstats
path: root/src/storage/LocalStorage.cxx
diff options
context:
space:
mode:
authorMax Kellermann <max@duempel.org>2014-01-29 18:14:57 +0100
committerMax Kellermann <max@duempel.org>2014-02-05 10:04:03 +0100
commit9ae7f186bc43749383594807b1d751b5389161e7 (patch)
tree0cafbfde8316c4b1a9ded19060d3020977a604dd /src/storage/LocalStorage.cxx
parentf8d114be42663006d162311c1ecaf4306e0b72e4 (diff)
downloadmpd-9ae7f186bc43749383594807b1d751b5389161e7.tar.gz
mpd-9ae7f186bc43749383594807b1d751b5389161e7.tar.xz
mpd-9ae7f186bc43749383594807b1d751b5389161e7.zip
LocalStorage: new API abstracting filesystem walk
Prepare to make this a new plugin API, for example to use a SMB share for the music_directory.
Diffstat (limited to 'src/storage/LocalStorage.cxx')
-rw-r--r--src/storage/LocalStorage.cxx154
1 files changed, 154 insertions, 0 deletions
diff --git a/src/storage/LocalStorage.cxx b/src/storage/LocalStorage.cxx
new file mode 100644
index 000000000..a229b3fe7
--- /dev/null
+++ b/src/storage/LocalStorage.cxx
@@ -0,0 +1,154 @@
+/*
+ * 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 "LocalStorage.hxx"
+#include "FileInfo.hxx"
+#include "util/Error.hxx"
+#include "fs/FileSystem.hxx"
+
+static bool
+Stat(Path path, bool follow, FileInfo &info, Error &error)
+{
+ struct stat st;
+ if (!StatFile(path, st, follow)) {
+ error.SetErrno();
+
+ const auto path_utf8 = path.ToUTF8();
+ error.FormatPrefix("Failed to stat %s: ", path_utf8.c_str());
+ return false;
+ }
+
+ if (S_ISREG(st.st_mode))
+ info.type = FileInfo::Type::REGULAR;
+ else if (S_ISDIR(st.st_mode))
+ info.type = FileInfo::Type::DIRECTORY;
+ else
+ info.type = FileInfo::Type::OTHER;
+
+ info.size = st.st_size;
+ info.mtime = st.st_mtime;
+ info.device = st.st_dev;
+ info.inode = st.st_ino;
+ return true;
+}
+
+std::string
+LocalStorage::MapUTF8(const char *uri_utf8) const
+{
+ assert(uri_utf8 != nullptr);
+
+ if (*uri_utf8 == 0)
+ return base_utf8;
+
+ return PathTraitsUTF8::Build(base_utf8.c_str(), uri_utf8);
+}
+
+AllocatedPath
+LocalStorage::MapFS(const char *uri_utf8, Error &error) const
+{
+ assert(uri_utf8 != nullptr);
+
+ if (*uri_utf8 == 0)
+ return base_fs;
+
+ AllocatedPath path_fs = AllocatedPath::FromUTF8(uri_utf8, error);
+ if (!path_fs.IsNull())
+ path_fs = AllocatedPath::Build(base_fs, path_fs);
+
+ return path_fs;
+}
+
+AllocatedPath
+LocalStorage::MapFS(const char *uri_utf8) const
+{
+ return MapFS(uri_utf8, IgnoreError());
+}
+
+AllocatedPath
+LocalStorage::MapChildFS(const char *uri_utf8,
+ const char *child_utf8) const
+{
+ const auto uri2 = PathTraitsUTF8::Build(uri_utf8, child_utf8);
+ return MapFS(uri2.c_str());
+}
+
+bool
+LocalStorage::GetInfo(const char *uri_utf8, bool follow, FileInfo &info,
+ Error &error)
+{
+ AllocatedPath path_fs = MapFS(uri_utf8, error);
+ if (path_fs.IsNull())
+ return false;
+
+ return Stat(path_fs, follow, info, error);
+}
+
+LocalDirectoryReader *
+LocalStorage::OpenDirectory(const char *uri_utf8, Error &error)
+{
+ AllocatedPath path_fs = MapFS(uri_utf8, error);
+ if (path_fs.IsNull())
+ return nullptr;
+
+ LocalDirectoryReader *reader =
+ new LocalDirectoryReader(std::move(path_fs));
+ if (reader->HasFailed()) {
+ error.FormatErrno("Failed to open '%s'", uri_utf8);
+ delete reader;
+ return nullptr;
+ }
+
+ return reader;
+}
+
+gcc_pure
+static bool
+SkipNameFS(const char *name_fs)
+{
+ return name_fs[0] == '.' &&
+ (name_fs[1] == 0 ||
+ (name_fs[1] == '.' && name_fs[2] == 0));
+}
+
+const char *
+LocalDirectoryReader::Read()
+{
+ while (reader.ReadEntry()) {
+ const Path name_fs = reader.GetEntry();
+ if (SkipNameFS(name_fs.c_str()))
+ continue;
+
+ name_utf8 = name_fs.ToUTF8();
+ if (name_utf8.empty())
+ continue;
+
+ return name_utf8.c_str();
+ }
+
+ return nullptr;
+}
+
+bool
+LocalDirectoryReader::GetInfo(bool follow, FileInfo &info, Error &error)
+{
+ const AllocatedPath path_fs =
+ AllocatedPath::Build(base_fs, reader.GetEntry());
+ return Stat(path_fs, follow, info, error);
+}