192 lines
4.5 KiB
C++
192 lines
4.5 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "LocalStorage.hxx"
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#include "storage/StoragePlugin.hxx"
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#include "storage/StorageInterface.hxx"
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#include "storage/FileInfo.hxx"
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#include "fs/FileInfo.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "fs/DirectoryReader.hxx"
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#include "util/StringCompare.hxx"
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#include <string>
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class LocalDirectoryReader final : public StorageDirectoryReader {
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AllocatedPath base_fs;
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DirectoryReader reader;
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std::string name_utf8;
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public:
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LocalDirectoryReader(AllocatedPath &&_base_fs)
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:base_fs(std::move(_base_fs)), reader(base_fs) {}
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/* virtual methods from class StorageDirectoryReader */
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const char *Read() noexcept override;
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StorageFileInfo GetInfo(bool follow) override;
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};
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class LocalStorage final : public Storage {
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const AllocatedPath base_fs;
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const std::string base_utf8;
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public:
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explicit LocalStorage(Path _base_fs)
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:base_fs(_base_fs), base_utf8(base_fs.ToUTF8()) {
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assert(!base_fs.IsNull());
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assert(!base_utf8.empty());
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}
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/* virtual methods from class Storage */
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StorageFileInfo GetInfo(const char *uri_utf8, bool follow) override;
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StorageDirectoryReader *OpenDirectory(const char *uri_utf8) override;
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std::string MapUTF8(const char *uri_utf8) const noexcept override;
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AllocatedPath MapFS(const char *uri_utf8) const noexcept override;
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const char *MapToRelativeUTF8(const char *uri_utf8) const noexcept override;
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private:
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AllocatedPath MapFSOrThrow(const char *uri_utf8) const;
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};
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static StorageFileInfo
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Stat(Path path, bool follow)
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{
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const FileInfo src(path, follow);
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StorageFileInfo info;
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if (src.IsRegular())
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info.type = StorageFileInfo::Type::REGULAR;
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else if (src.IsDirectory())
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info.type = StorageFileInfo::Type::DIRECTORY;
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else
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info.type = StorageFileInfo::Type::OTHER;
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info.size = src.GetSize();
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info.mtime = src.GetModificationTime();
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#ifdef _WIN32
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info.device = info.inode = 0;
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#else
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info.device = src.GetDevice();
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info.inode = src.GetInode();
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#endif
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return info;
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}
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std::string
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LocalStorage::MapUTF8(const char *uri_utf8) const noexcept
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{
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assert(uri_utf8 != nullptr);
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if (StringIsEmpty(uri_utf8))
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return base_utf8;
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return PathTraitsUTF8::Build(base_utf8.c_str(), uri_utf8);
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}
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AllocatedPath
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LocalStorage::MapFSOrThrow(const char *uri_utf8) const
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{
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assert(uri_utf8 != nullptr);
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if (StringIsEmpty(uri_utf8))
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return base_fs;
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return AllocatedPath::Build(base_fs,
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AllocatedPath::FromUTF8Throw(uri_utf8));
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}
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AllocatedPath
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LocalStorage::MapFS(const char *uri_utf8) const noexcept
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{
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try {
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return MapFSOrThrow(uri_utf8);
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} catch (...) {
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return nullptr;
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}
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}
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const char *
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LocalStorage::MapToRelativeUTF8(const char *uri_utf8) const noexcept
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{
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return PathTraitsUTF8::Relative(base_utf8.c_str(), uri_utf8);
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}
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StorageFileInfo
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LocalStorage::GetInfo(const char *uri_utf8, bool follow)
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{
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return Stat(MapFSOrThrow(uri_utf8), follow);
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}
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StorageDirectoryReader *
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LocalStorage::OpenDirectory(const char *uri_utf8)
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{
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return new LocalDirectoryReader(MapFSOrThrow(uri_utf8));
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}
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gcc_pure
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static bool
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SkipNameFS(PathTraitsFS::const_pointer_type name_fs) noexcept
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{
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return name_fs[0] == '.' &&
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(name_fs[1] == 0 ||
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(name_fs[1] == '.' && name_fs[2] == 0));
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}
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const char *
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LocalDirectoryReader::Read() noexcept
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{
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while (reader.ReadEntry()) {
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const Path name_fs = reader.GetEntry();
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if (SkipNameFS(name_fs.c_str()))
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continue;
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name_utf8 = name_fs.ToUTF8();
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if (name_utf8.empty())
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continue;
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return name_utf8.c_str();
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}
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return nullptr;
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}
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StorageFileInfo
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LocalDirectoryReader::GetInfo(bool follow)
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{
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return Stat(AllocatedPath::Build(base_fs, reader.GetEntry()), follow);
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}
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std::unique_ptr<Storage>
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CreateLocalStorage(Path base_fs)
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{
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return std::make_unique<LocalStorage>(base_fs);
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}
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const StoragePlugin local_storage_plugin = {
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"local",
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nullptr,
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};
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