From 7166fdc49072d987d04e681de4d9e1558ba75c63 Mon Sep 17 00:00:00 2001 From: wwylele Date: Mon, 17 Oct 2016 14:54:48 +0800 Subject: FileSys: add SaveDataArchive The error checking of SaveDataArchive is completely different from DiskArchive, so it has to be a new class instead of a subclass of DiskArchive. --- src/core/file_sys/savedata_archive.cpp | 283 +++++++++++++++++++++++++++++++++ 1 file changed, 283 insertions(+) create mode 100644 src/core/file_sys/savedata_archive.cpp (limited to 'src/core/file_sys/savedata_archive.cpp') diff --git a/src/core/file_sys/savedata_archive.cpp b/src/core/file_sys/savedata_archive.cpp new file mode 100644 index 000000000..f2e6a06bc --- /dev/null +++ b/src/core/file_sys/savedata_archive.cpp @@ -0,0 +1,283 @@ +// Copyright 2016 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include "common/file_util.h" +#include "core/file_sys/disk_archive.h" +#include "core/file_sys/errors.h" +#include "core/file_sys/path_parser.h" +#include "core/file_sys/savedata_archive.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// FileSys namespace + +namespace FileSys { + +ResultVal> SaveDataArchive::OpenFile(const Path& path, + const Mode& mode) const { + LOG_DEBUG(Service_FS, "called path=%s mode=%01X", path.DebugStr().c_str(), mode.hex); + + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + if (mode.hex == 0) { + LOG_ERROR(Service_FS, "Empty open mode"); + return ERROR_UNSUPPORTED_OPEN_FLAGS; + } + + if (mode.create_flag && !mode.write_flag) { + LOG_ERROR(Service_FS, "Create flag set but write flag not set"); + return ERROR_UNSUPPORTED_OPEN_FLAGS; + } + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_FILE_NOT_FOUND; + case PathParser::PathNotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + case PathParser::DirectoryFound: + LOG_ERROR(Service_FS, "Unexpected file or directory in %s", full_path.c_str()); + return ERROR_UNEXPECTED_FILE_OR_DIRECTORY; + case PathParser::NotFound: + if (!mode.create_flag) { + LOG_ERROR(Service_FS, "Non-existing file %s can't be open without mode create.", + full_path.c_str()); + return ERROR_FILE_NOT_FOUND; + } else { + // Create the file + FileUtil::CreateEmptyFile(full_path); + } + break; + } + + FileUtil::IOFile file(full_path, mode.write_flag ? "r+b" : "rb"); + if (!file.IsOpen()) { + LOG_CRITICAL(Service_FS, "(unreachable) Unknown error opening %s", full_path.c_str()); + return ERROR_FILE_NOT_FOUND; + } + + auto disk_file = std::make_unique(std::move(file), mode); + return MakeResult>(std::move(disk_file)); +} + +ResultCode SaveDataArchive::DeleteFile(const Path& path) const { + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_FILE_NOT_FOUND; + case PathParser::PathNotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + case PathParser::DirectoryFound: + case PathParser::NotFound: + LOG_ERROR(Service_FS, "File not found %s", full_path.c_str()); + return ERROR_FILE_NOT_FOUND; + } + + if (FileUtil::Delete(full_path)) { + return RESULT_SUCCESS; + } + + LOG_CRITICAL(Service_FS, "(unreachable) Unknown error deleting %s", full_path.c_str()); + return ERROR_FILE_NOT_FOUND; +} + +ResultCode SaveDataArchive::RenameFile(const Path& src_path, const Path& dest_path) const { + if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString())) { + return RESULT_SUCCESS; + } + + // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't + // exist or similar. Verify. + return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description + ErrorSummary::NothingHappened, ErrorLevel::Status); +} + +template +static ResultCode DeleteDirectoryHelper(const Path& path, const std::string& mount_point, + T deleter) { + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + if (path_parser.IsRootDirectory()) + return ERROR_DIRECTORY_NOT_EMPTY; + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::PathNotFound: + case PathParser::NotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + case PathParser::FileFound: + LOG_ERROR(Service_FS, "Unexpected file or directory %s", full_path.c_str()); + return ERROR_UNEXPECTED_FILE_OR_DIRECTORY; + } + + if (deleter(full_path)) { + return RESULT_SUCCESS; + } + + LOG_ERROR(Service_FS, "Directory not empty %s", full_path.c_str()); + return ERROR_DIRECTORY_NOT_EMPTY; +} + +ResultCode SaveDataArchive::DeleteDirectory(const Path& path) const { + return DeleteDirectoryHelper(path, mount_point, FileUtil::DeleteDir); +} + +ResultCode SaveDataArchive::DeleteDirectoryRecursively(const Path& path) const { + return DeleteDirectoryHelper( + path, mount_point, [](const std::string& p) { return FileUtil::DeleteDirRecursively(p); }); +} + +ResultCode SaveDataArchive::CreateFile(const FileSys::Path& path, u64 size) const { + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_FILE_NOT_FOUND; + case PathParser::PathNotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str()); + return ERROR_UNEXPECTED_FILE_OR_DIRECTORY; + case PathParser::DirectoryFound: + case PathParser::FileFound: + LOG_ERROR(Service_FS, "%s already exists", full_path.c_str()); + return ERROR_FILE_ALREADY_EXISTS; + } + + if (size == 0) { + FileUtil::CreateEmptyFile(full_path); + return RESULT_SUCCESS; + } + + FileUtil::IOFile file(full_path, "wb"); + // Creates a sparse file (or a normal file on filesystems without the concept of sparse files) + // We do this by seeking to the right size, then writing a single null byte. + if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1) { + return RESULT_SUCCESS; + } + + LOG_ERROR(Service_FS, "Too large file"); + return ResultCode(ErrorDescription::TooLarge, ErrorModule::FS, ErrorSummary::OutOfResource, + ErrorLevel::Info); +} + +ResultCode SaveDataArchive::CreateDirectory(const Path& path) const { + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_FILE_NOT_FOUND; + case PathParser::PathNotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str()); + return ERROR_UNEXPECTED_FILE_OR_DIRECTORY; + case PathParser::DirectoryFound: + case PathParser::FileFound: + LOG_ERROR(Service_FS, "%s already exists", full_path.c_str()); + return ERROR_DIRECTORY_ALREADY_EXISTS; + } + + if (FileUtil::CreateDir(mount_point + path.AsString())) { + return RESULT_SUCCESS; + } + + LOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating %s", mount_point.c_str()); + return ResultCode(ErrorDescription::NoData, ErrorModule::FS, ErrorSummary::Canceled, + ErrorLevel::Status); +} + +ResultCode SaveDataArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const { + if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString())) + return RESULT_SUCCESS; + + // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't + // exist or similar. Verify. + return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description + ErrorSummary::NothingHappened, ErrorLevel::Status); +} + +ResultVal> SaveDataArchive::OpenDirectory( + const Path& path) const { + const PathParser path_parser(path); + + if (!path_parser.IsValid()) { + LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str()); + return ERROR_INVALID_PATH; + } + + const auto full_path = path_parser.BuildHostPath(mount_point); + + switch (path_parser.GetHostStatus(mount_point)) { + case PathParser::InvalidMountPoint: + LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str()); + return ERROR_FILE_NOT_FOUND; + case PathParser::PathNotFound: + case PathParser::NotFound: + LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str()); + return ERROR_PATH_NOT_FOUND; + case PathParser::FileInPath: + case PathParser::FileFound: + LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str()); + return ERROR_UNEXPECTED_FILE_OR_DIRECTORY; + } + + auto directory = std::make_unique(full_path); + return MakeResult>(std::move(directory)); +} + +u64 SaveDataArchive::GetFreeBytes() const { + // TODO: Stubbed to return 1GiB + return 1024 * 1024 * 1024; +} + +} // namespace FileSys -- cgit v1.2.3