238 lines
7.4 KiB
C++
238 lines
7.4 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <cstring>
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#include <memory>
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "core/file_sys/disk_filesystem.h"
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#include "core/file_sys/errors.h"
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namespace FileSys {
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static std::string ModeFlagsToString(Mode mode) {
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std::string mode_str;
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u32 mode_flags = static_cast<u32>(mode);
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// Calculate the correct open mode for the file.
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if ((mode_flags & static_cast<u32>(Mode::Read)) &&
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(mode_flags & static_cast<u32>(Mode::Write))) {
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if (mode_flags & static_cast<u32>(Mode::Append))
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mode_str = "a+";
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else
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mode_str = "r+";
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} else {
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if (mode_flags & static_cast<u32>(Mode::Read))
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mode_str = "r";
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else if (mode_flags & static_cast<u32>(Mode::Append))
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mode_str = "a";
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else if (mode_flags & static_cast<u32>(Mode::Write))
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mode_str = "w";
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}
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mode_str += "b";
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return mode_str;
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}
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std::string Disk_FileSystem::GetName() const {
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return "Disk";
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}
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ResultVal<std::unique_ptr<StorageBackend>> Disk_FileSystem::OpenFile(const std::string& path,
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Mode mode) const {
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// Calculate the correct open mode for the file.
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std::string mode_str = ModeFlagsToString(mode);
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std::string full_path = base_directory + path;
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auto file = std::make_shared<FileUtil::IOFile>(full_path, mode_str.c_str());
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if (!file->IsOpen()) {
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return ERROR_PATH_NOT_FOUND;
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}
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return MakeResult<std::unique_ptr<StorageBackend>>(
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std::make_unique<Disk_Storage>(std::move(file)));
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}
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ResultCode Disk_FileSystem::DeleteFile(const std::string& path) const {
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if (!FileUtil::Exists(path)) {
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return ERROR_PATH_NOT_FOUND;
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}
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FileUtil::Delete(path);
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return RESULT_SUCCESS;
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}
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ResultCode Disk_FileSystem::RenameFile(const std::string& src_path,
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const std::string& dest_path) const {
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const std::string full_src_path = base_directory + src_path;
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const std::string full_dest_path = base_directory + dest_path;
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if (!FileUtil::Exists(full_src_path)) {
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return ERROR_PATH_NOT_FOUND;
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}
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// TODO(wwylele): Use correct error code
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return FileUtil::Rename(full_src_path, full_dest_path) ? RESULT_SUCCESS : ResultCode(-1);
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}
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ResultCode Disk_FileSystem::DeleteDirectory(const Path& path) const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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// TODO(wwylele): Use correct error code
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return ResultCode(-1);
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}
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ResultCode Disk_FileSystem::DeleteDirectoryRecursively(const Path& path) const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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// TODO(wwylele): Use correct error code
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return ResultCode(-1);
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}
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ResultCode Disk_FileSystem::CreateFile(const std::string& path, u64 size) const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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std::string full_path = base_directory + path;
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if (size == 0) {
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FileUtil::CreateEmptyFile(full_path);
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return RESULT_SUCCESS;
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}
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FileUtil::IOFile file(full_path, "wb");
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// Creates a sparse file (or a normal file on filesystems without the concept of sparse files)
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// We do this by seeking to the right size, then writing a single null byte.
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if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1) {
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return RESULT_SUCCESS;
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}
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LOG_ERROR(Service_FS, "Too large file");
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// TODO(Subv): Find out the correct error code
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return ResultCode(-1);
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}
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ResultCode Disk_FileSystem::CreateDirectory(const std::string& path) const {
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// TODO(Subv): Perform path validation to prevent escaping the emulator sandbox.
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std::string full_path = base_directory + path;
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if (FileUtil::CreateDir(full_path)) {
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return RESULT_SUCCESS;
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}
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LOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating {}", full_path);
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// TODO(wwylele): Use correct error code
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return ResultCode(-1);
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}
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ResultCode Disk_FileSystem::RenameDirectory(const Path& src_path, const Path& dest_path) const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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// TODO(wwylele): Use correct error code
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return ResultCode(-1);
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}
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ResultVal<std::unique_ptr<DirectoryBackend>> Disk_FileSystem::OpenDirectory(
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const std::string& path) const {
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std::string full_path = base_directory + path;
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if (!FileUtil::IsDirectory(full_path)) {
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// TODO(Subv): Find the correct error code for this.
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return ResultCode(-1);
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}
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auto directory = std::make_unique<Disk_Directory>(full_path);
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return MakeResult<std::unique_ptr<DirectoryBackend>>(std::move(directory));
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}
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u64 Disk_FileSystem::GetFreeSpaceSize() const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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return 0;
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}
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ResultVal<FileSys::EntryType> Disk_FileSystem::GetEntryType(const std::string& path) const {
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std::string full_path = base_directory + path;
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if (!FileUtil::Exists(full_path)) {
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return ERROR_PATH_NOT_FOUND;
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}
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if (FileUtil::IsDirectory(full_path))
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return MakeResult(EntryType::Directory);
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return MakeResult(EntryType::File);
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}
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ResultVal<size_t> Disk_Storage::Read(const u64 offset, const size_t length, u8* buffer) const {
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LOG_TRACE(Service_FS, "called offset={}, length={}", offset, length);
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file->Seek(offset, SEEK_SET);
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return MakeResult<size_t>(file->ReadBytes(buffer, length));
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}
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ResultVal<size_t> Disk_Storage::Write(const u64 offset, const size_t length, const bool flush,
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const u8* buffer) const {
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LOG_WARNING(Service_FS, "(STUBBED) called");
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file->Seek(offset, SEEK_SET);
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size_t written = file->WriteBytes(buffer, length);
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if (flush) {
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file->Flush();
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}
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return MakeResult<size_t>(written);
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}
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u64 Disk_Storage::GetSize() const {
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return file->GetSize();
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}
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bool Disk_Storage::SetSize(const u64 size) const {
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file->Resize(size);
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file->Flush();
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return true;
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}
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Disk_Directory::Disk_Directory(const std::string& path) {
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unsigned size = FileUtil::ScanDirectoryTree(path, directory);
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directory.size = size;
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directory.isDirectory = true;
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children_iterator = directory.children.begin();
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}
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u64 Disk_Directory::Read(const u64 count, Entry* entries) {
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u64 entries_read = 0;
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while (entries_read < count && children_iterator != directory.children.cend()) {
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const FileUtil::FSTEntry& file = *children_iterator;
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const std::string& filename = file.virtualName;
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Entry& entry = entries[entries_read];
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LOG_TRACE(Service_FS, "File {}: size={} dir={}", filename, file.size, file.isDirectory);
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// TODO(Link Mauve): use a proper conversion to UTF-16.
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for (size_t j = 0; j < FILENAME_LENGTH; ++j) {
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entry.filename[j] = filename[j];
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if (!filename[j])
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break;
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}
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if (file.isDirectory) {
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entry.file_size = 0;
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entry.type = EntryType::Directory;
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} else {
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entry.file_size = file.size;
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entry.type = EntryType::File;
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}
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++entries_read;
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++children_iterator;
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}
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return entries_read;
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}
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u64 Disk_Directory::GetEntryCount() const {
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// We convert the children iterator into a const_iterator to allow template argument deduction
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// in std::distance.
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std::vector<FileUtil::FSTEntry>::const_iterator current = children_iterator;
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return std::distance(current, directory.children.end());
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}
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} // namespace FileSys
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