From 913896cbd99e414c325c9d47a987376ed6d9fffd Mon Sep 17 00:00:00 2001 From: bunnei Date: Sat, 7 Jul 2018 20:24:51 -0700 Subject: Revert "Virtual Filesystem (#597)" This reverts commit 77c684c1140f6bf3fb7d4560d06d2efb1a2ee5e2. --- src/core/file_sys/disk_filesystem.cpp | 237 ++++++++++++++++++++++++++++++++++ 1 file changed, 237 insertions(+) create mode 100644 src/core/file_sys/disk_filesystem.cpp (limited to 'src/core/file_sys/disk_filesystem.cpp') diff --git a/src/core/file_sys/disk_filesystem.cpp b/src/core/file_sys/disk_filesystem.cpp new file mode 100644 index 000000000..8c6f15bb5 --- /dev/null +++ b/src/core/file_sys/disk_filesystem.cpp @@ -0,0 +1,237 @@ +// Copyright 2018 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include +#include +#include "common/common_types.h" +#include "common/logging/log.h" +#include "core/file_sys/disk_filesystem.h" +#include "core/file_sys/errors.h" + +namespace FileSys { + +static std::string ModeFlagsToString(Mode mode) { + std::string mode_str; + u32 mode_flags = static_cast(mode); + + // Calculate the correct open mode for the file. + if ((mode_flags & static_cast(Mode::Read)) && + (mode_flags & static_cast(Mode::Write))) { + if (mode_flags & static_cast(Mode::Append)) + mode_str = "a+"; + else + mode_str = "r+"; + } else { + if (mode_flags & static_cast(Mode::Read)) + mode_str = "r"; + else if (mode_flags & static_cast(Mode::Append)) + mode_str = "a"; + else if (mode_flags & static_cast(Mode::Write)) + mode_str = "w"; + } + + mode_str += "b"; + + return mode_str; +} + +std::string Disk_FileSystem::GetName() const { + return "Disk"; +} + +ResultVal> Disk_FileSystem::OpenFile(const std::string& path, + Mode mode) const { + + // Calculate the correct open mode for the file. + std::string mode_str = ModeFlagsToString(mode); + + std::string full_path = base_directory + path; + auto file = std::make_shared(full_path, mode_str.c_str()); + + if (!file->IsOpen()) { + return ERROR_PATH_NOT_FOUND; + } + + return MakeResult>( + std::make_unique(std::move(file))); +} + +ResultCode Disk_FileSystem::DeleteFile(const std::string& path) const { + if (!FileUtil::Exists(path)) { + return ERROR_PATH_NOT_FOUND; + } + + FileUtil::Delete(path); + + return RESULT_SUCCESS; +} + +ResultCode Disk_FileSystem::RenameFile(const std::string& src_path, + const std::string& dest_path) const { + const std::string full_src_path = base_directory + src_path; + const std::string full_dest_path = base_directory + dest_path; + + if (!FileUtil::Exists(full_src_path)) { + return ERROR_PATH_NOT_FOUND; + } + // TODO(wwylele): Use correct error code + return FileUtil::Rename(full_src_path, full_dest_path) ? RESULT_SUCCESS : ResultCode(-1); +} + +ResultCode Disk_FileSystem::DeleteDirectory(const Path& path) const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + // TODO(wwylele): Use correct error code + return ResultCode(-1); +} + +ResultCode Disk_FileSystem::DeleteDirectoryRecursively(const Path& path) const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + // TODO(wwylele): Use correct error code + return ResultCode(-1); +} + +ResultCode Disk_FileSystem::CreateFile(const std::string& path, u64 size) const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + + std::string full_path = base_directory + path; + 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"); + // TODO(Subv): Find out the correct error code + return ResultCode(-1); +} + +ResultCode Disk_FileSystem::CreateDirectory(const std::string& path) const { + // TODO(Subv): Perform path validation to prevent escaping the emulator sandbox. + std::string full_path = base_directory + path; + + if (FileUtil::CreateDir(full_path)) { + return RESULT_SUCCESS; + } + + LOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating {}", full_path); + // TODO(wwylele): Use correct error code + return ResultCode(-1); +} + +ResultCode Disk_FileSystem::RenameDirectory(const Path& src_path, const Path& dest_path) const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + // TODO(wwylele): Use correct error code + return ResultCode(-1); +} + +ResultVal> Disk_FileSystem::OpenDirectory( + const std::string& path) const { + + std::string full_path = base_directory + path; + + if (!FileUtil::IsDirectory(full_path)) { + // TODO(Subv): Find the correct error code for this. + return ResultCode(-1); + } + + auto directory = std::make_unique(full_path); + return MakeResult>(std::move(directory)); +} + +u64 Disk_FileSystem::GetFreeSpaceSize() const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + return 0; +} + +ResultVal Disk_FileSystem::GetEntryType(const std::string& path) const { + std::string full_path = base_directory + path; + if (!FileUtil::Exists(full_path)) { + return ERROR_PATH_NOT_FOUND; + } + + if (FileUtil::IsDirectory(full_path)) + return MakeResult(EntryType::Directory); + + return MakeResult(EntryType::File); +} + +ResultVal Disk_Storage::Read(const u64 offset, const size_t length, u8* buffer) const { + LOG_TRACE(Service_FS, "called offset={}, length={}", offset, length); + file->Seek(offset, SEEK_SET); + return MakeResult(file->ReadBytes(buffer, length)); +} + +ResultVal Disk_Storage::Write(const u64 offset, const size_t length, const bool flush, + const u8* buffer) const { + LOG_WARNING(Service_FS, "(STUBBED) called"); + file->Seek(offset, SEEK_SET); + size_t written = file->WriteBytes(buffer, length); + if (flush) { + file->Flush(); + } + return MakeResult(written); +} + +u64 Disk_Storage::GetSize() const { + return file->GetSize(); +} + +bool Disk_Storage::SetSize(const u64 size) const { + file->Resize(size); + file->Flush(); + return true; +} + +Disk_Directory::Disk_Directory(const std::string& path) { + unsigned size = FileUtil::ScanDirectoryTree(path, directory); + directory.size = size; + directory.isDirectory = true; + children_iterator = directory.children.begin(); +} + +u64 Disk_Directory::Read(const u64 count, Entry* entries) { + u64 entries_read = 0; + + while (entries_read < count && children_iterator != directory.children.cend()) { + const FileUtil::FSTEntry& file = *children_iterator; + const std::string& filename = file.virtualName; + Entry& entry = entries[entries_read]; + + LOG_TRACE(Service_FS, "File {}: size={} dir={}", filename, file.size, file.isDirectory); + + // TODO(Link Mauve): use a proper conversion to UTF-16. + for (size_t j = 0; j < FILENAME_LENGTH; ++j) { + entry.filename[j] = filename[j]; + if (!filename[j]) + break; + } + + if (file.isDirectory) { + entry.file_size = 0; + entry.type = EntryType::Directory; + } else { + entry.file_size = file.size; + entry.type = EntryType::File; + } + + ++entries_read; + ++children_iterator; + } + return entries_read; +} + +u64 Disk_Directory::GetEntryCount() const { + // We convert the children iterator into a const_iterator to allow template argument deduction + // in std::distance. + std::vector::const_iterator current = children_iterator; + return std::distance(current, directory.children.end()); +} + +} // namespace FileSys -- cgit v1.2.3