437 lines
16 KiB
C++
437 lines
16 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 <algorithm>
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#include <cstddef>
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#include <iterator>
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#include <utility>
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#include "common/assert.h"
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#include "common/common_paths.h"
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#include "common/file_util.h"
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#include "common/logging/log.h"
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#include "core/file_sys/vfs_real.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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// Calculate the correct open mode for the file.
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if (mode & Mode::Read && mode & Mode::Write) {
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if (mode & 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 & Mode::Read)
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mode_str = "r";
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else if (mode & Mode::Append)
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mode_str = "a";
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else if (mode & Mode::Write)
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mode_str = "w";
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else
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UNREACHABLE_MSG("Invalid file open mode: {:02X}", static_cast<u8>(mode));
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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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RealVfsFilesystem::RealVfsFilesystem() : VfsFilesystem(nullptr) {}
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RealVfsFilesystem::~RealVfsFilesystem() = default;
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std::string RealVfsFilesystem::GetName() const {
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return "Real";
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}
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bool RealVfsFilesystem::IsReadable() const {
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return true;
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}
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bool RealVfsFilesystem::IsWritable() const {
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return true;
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}
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VfsEntryType RealVfsFilesystem::GetEntryType(std::string_view path_) const {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (!FileUtil::Exists(path))
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return VfsEntryType::None;
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if (FileUtil::IsDirectory(path))
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return VfsEntryType::Directory;
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return VfsEntryType::File;
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}
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VirtualFile RealVfsFilesystem::OpenFile(std::string_view path_, Mode perms) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (cache.find(path) != cache.end()) {
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auto weak = cache[path];
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if (!weak.expired()) {
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return std::shared_ptr<RealVfsFile>(new RealVfsFile(*this, weak.lock(), path, perms));
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}
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}
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if (!FileUtil::Exists(path) && (perms & Mode::WriteAppend) != 0)
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FileUtil::CreateEmptyFile(path);
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auto backing = std::make_shared<FileUtil::IOFile>(path, ModeFlagsToString(perms).c_str());
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cache[path] = backing;
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// Cannot use make_shared as RealVfsFile constructor is private
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return std::shared_ptr<RealVfsFile>(new RealVfsFile(*this, backing, path, perms));
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}
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VirtualFile RealVfsFilesystem::CreateFile(std::string_view path_, Mode perms) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto path_fwd = FileUtil::SanitizePath(path, FileUtil::DirectorySeparator::ForwardSlash);
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if (!FileUtil::Exists(path)) {
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FileUtil::CreateFullPath(path_fwd);
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if (!FileUtil::CreateEmptyFile(path))
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return nullptr;
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}
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return OpenFile(path, perms);
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}
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VirtualFile RealVfsFilesystem::CopyFile(std::string_view old_path_, std::string_view new_path_) {
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const auto old_path =
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FileUtil::SanitizePath(old_path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto new_path =
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FileUtil::SanitizePath(new_path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (!FileUtil::Exists(old_path) || FileUtil::Exists(new_path) ||
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FileUtil::IsDirectory(old_path) || !FileUtil::Copy(old_path, new_path))
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return nullptr;
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return OpenFile(new_path, Mode::ReadWrite);
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}
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VirtualFile RealVfsFilesystem::MoveFile(std::string_view old_path_, std::string_view new_path_) {
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const auto old_path =
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FileUtil::SanitizePath(old_path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto new_path =
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FileUtil::SanitizePath(new_path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (!FileUtil::Exists(old_path) || FileUtil::Exists(new_path) ||
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FileUtil::IsDirectory(old_path) || !FileUtil::Rename(old_path, new_path))
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return nullptr;
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if (cache.find(old_path) != cache.end()) {
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auto cached = cache[old_path];
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if (!cached.expired()) {
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auto file = cached.lock();
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file->Open(new_path, "r+b");
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cache.erase(old_path);
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cache[new_path] = file;
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}
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}
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return OpenFile(new_path, Mode::ReadWrite);
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}
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bool RealVfsFilesystem::DeleteFile(std::string_view path_) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (cache.find(path) != cache.end()) {
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if (!cache[path].expired())
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cache[path].lock()->Close();
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cache.erase(path);
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}
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return FileUtil::Delete(path);
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}
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VirtualDir RealVfsFilesystem::OpenDirectory(std::string_view path_, Mode perms) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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// Cannot use make_shared as RealVfsDirectory constructor is private
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return std::shared_ptr<RealVfsDirectory>(new RealVfsDirectory(*this, path, perms));
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}
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VirtualDir RealVfsFilesystem::CreateDirectory(std::string_view path_, Mode perms) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto path_fwd = FileUtil::SanitizePath(path, FileUtil::DirectorySeparator::ForwardSlash);
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if (!FileUtil::Exists(path)) {
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FileUtil::CreateFullPath(path_fwd);
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if (!FileUtil::CreateDir(path))
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return nullptr;
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}
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// Cannot use make_shared as RealVfsDirectory constructor is private
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return std::shared_ptr<RealVfsDirectory>(new RealVfsDirectory(*this, path, perms));
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}
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VirtualDir RealVfsFilesystem::CopyDirectory(std::string_view old_path_,
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std::string_view new_path_) {
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const auto old_path =
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FileUtil::SanitizePath(old_path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto new_path =
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FileUtil::SanitizePath(new_path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (!FileUtil::Exists(old_path) || FileUtil::Exists(new_path) ||
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!FileUtil::IsDirectory(old_path))
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return nullptr;
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FileUtil::CopyDir(old_path, new_path);
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return OpenDirectory(new_path, Mode::ReadWrite);
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}
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VirtualDir RealVfsFilesystem::MoveDirectory(std::string_view old_path_,
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std::string_view new_path_) {
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const auto old_path =
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FileUtil::SanitizePath(old_path_, FileUtil::DirectorySeparator::PlatformDefault);
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const auto new_path =
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FileUtil::SanitizePath(new_path_, FileUtil::DirectorySeparator::PlatformDefault);
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if (!FileUtil::Exists(old_path) || FileUtil::Exists(new_path) ||
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FileUtil::IsDirectory(old_path) || !FileUtil::Rename(old_path, new_path))
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return nullptr;
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for (auto& kv : cache) {
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// Path in cache starts with old_path
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if (kv.first.rfind(old_path, 0) == 0) {
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const auto file_old_path =
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FileUtil::SanitizePath(kv.first, FileUtil::DirectorySeparator::PlatformDefault);
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const auto file_new_path =
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FileUtil::SanitizePath(new_path + DIR_SEP + kv.first.substr(old_path.size()),
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FileUtil::DirectorySeparator::PlatformDefault);
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auto cached = cache[file_old_path];
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if (!cached.expired()) {
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auto file = cached.lock();
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file->Open(file_new_path, "r+b");
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cache.erase(file_old_path);
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cache[file_new_path] = file;
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}
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}
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}
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return OpenDirectory(new_path, Mode::ReadWrite);
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}
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bool RealVfsFilesystem::DeleteDirectory(std::string_view path_) {
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const auto path = FileUtil::SanitizePath(path_, FileUtil::DirectorySeparator::PlatformDefault);
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for (auto& kv : cache) {
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// Path in cache starts with old_path
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if (kv.first.rfind(path, 0) == 0) {
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if (!cache[kv.first].expired())
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cache[kv.first].lock()->Close();
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cache.erase(kv.first);
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}
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}
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return FileUtil::DeleteDirRecursively(path);
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}
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RealVfsFile::RealVfsFile(RealVfsFilesystem& base_, std::shared_ptr<FileUtil::IOFile> backing_,
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const std::string& path_, Mode perms_)
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: base(base_), backing(std::move(backing_)), path(path_),
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parent_path(FileUtil::GetParentPath(path_)),
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path_components(FileUtil::SplitPathComponents(path_)),
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parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
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perms(perms_) {}
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RealVfsFile::~RealVfsFile() = default;
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std::string RealVfsFile::GetName() const {
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return path_components.back();
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}
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std::size_t RealVfsFile::GetSize() const {
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return backing->GetSize();
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}
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bool RealVfsFile::Resize(std::size_t new_size) {
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return backing->Resize(new_size);
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}
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std::shared_ptr<VfsDirectory> RealVfsFile::GetContainingDirectory() const {
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return base.OpenDirectory(parent_path, perms);
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}
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bool RealVfsFile::IsWritable() const {
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return (perms & Mode::WriteAppend) != 0;
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}
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bool RealVfsFile::IsReadable() const {
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return (perms & Mode::ReadWrite) != 0;
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}
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std::size_t RealVfsFile::Read(u8* data, std::size_t length, std::size_t offset) const {
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if (!backing->Seek(offset, SEEK_SET))
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return 0;
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return backing->ReadBytes(data, length);
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}
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std::size_t RealVfsFile::Write(const u8* data, std::size_t length, std::size_t offset) {
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if (!backing->Seek(offset, SEEK_SET))
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return 0;
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return backing->WriteBytes(data, length);
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}
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bool RealVfsFile::Rename(std::string_view name) {
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return base.MoveFile(path, parent_path + DIR_SEP + std::string(name)) != nullptr;
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}
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bool RealVfsFile::Close() {
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return backing->Close();
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}
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// TODO(DarkLordZach): MSVC would not let me combine the following two functions using 'if
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// constexpr' because there is a compile error in the branch not used.
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template <>
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std::vector<VirtualFile> RealVfsDirectory::IterateEntries<RealVfsFile, VfsFile>() const {
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if (perms == Mode::Append)
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return {};
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std::vector<VirtualFile> out;
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FileUtil::ForeachDirectoryEntry(
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nullptr, path,
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[&out, this](u64* entries_out, const std::string& directory, const std::string& filename) {
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const std::string full_path = directory + DIR_SEP + filename;
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if (!FileUtil::IsDirectory(full_path))
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out.emplace_back(base.OpenFile(full_path, perms));
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return true;
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});
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return out;
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}
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template <>
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std::vector<VirtualDir> RealVfsDirectory::IterateEntries<RealVfsDirectory, VfsDirectory>() const {
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if (perms == Mode::Append)
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return {};
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std::vector<VirtualDir> out;
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FileUtil::ForeachDirectoryEntry(
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nullptr, path,
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[&out, this](u64* entries_out, const std::string& directory, const std::string& filename) {
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const std::string full_path = directory + DIR_SEP + filename;
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if (FileUtil::IsDirectory(full_path))
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out.emplace_back(base.OpenDirectory(full_path, perms));
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return true;
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});
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return out;
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}
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RealVfsDirectory::RealVfsDirectory(RealVfsFilesystem& base_, const std::string& path_, Mode perms_)
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: base(base_), path(FileUtil::RemoveTrailingSlash(path_)),
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parent_path(FileUtil::GetParentPath(path)),
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path_components(FileUtil::SplitPathComponents(path)),
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parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
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perms(perms_) {
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if (!FileUtil::Exists(path) && perms & Mode::WriteAppend)
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FileUtil::CreateDir(path);
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}
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RealVfsDirectory::~RealVfsDirectory() = default;
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std::shared_ptr<VfsFile> RealVfsDirectory::GetFileRelative(std::string_view path) const {
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const auto full_path = FileUtil::SanitizePath(this->path + DIR_SEP + std::string(path));
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if (!FileUtil::Exists(full_path) || FileUtil::IsDirectory(full_path))
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return nullptr;
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return base.OpenFile(full_path, perms);
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}
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std::shared_ptr<VfsDirectory> RealVfsDirectory::GetDirectoryRelative(std::string_view path) const {
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const auto full_path = FileUtil::SanitizePath(this->path + DIR_SEP + std::string(path));
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if (!FileUtil::Exists(full_path) || !FileUtil::IsDirectory(full_path))
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return nullptr;
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return base.OpenDirectory(full_path, perms);
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}
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std::shared_ptr<VfsFile> RealVfsDirectory::GetFile(std::string_view name) const {
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return GetFileRelative(name);
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}
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std::shared_ptr<VfsDirectory> RealVfsDirectory::GetSubdirectory(std::string_view name) const {
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return GetDirectoryRelative(name);
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}
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std::shared_ptr<VfsFile> RealVfsDirectory::CreateFileRelative(std::string_view path) {
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const auto full_path = FileUtil::SanitizePath(this->path + DIR_SEP + std::string(path));
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return base.CreateFile(full_path, perms);
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}
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std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateDirectoryRelative(std::string_view path) {
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const auto full_path = FileUtil::SanitizePath(this->path + DIR_SEP + std::string(path));
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return base.CreateDirectory(full_path, perms);
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}
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bool RealVfsDirectory::DeleteSubdirectoryRecursive(std::string_view name) {
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auto full_path = FileUtil::SanitizePath(this->path + DIR_SEP + std::string(name));
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return base.DeleteDirectory(full_path);
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}
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std::vector<std::shared_ptr<VfsFile>> RealVfsDirectory::GetFiles() const {
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return IterateEntries<RealVfsFile, VfsFile>();
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}
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std::vector<std::shared_ptr<VfsDirectory>> RealVfsDirectory::GetSubdirectories() const {
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return IterateEntries<RealVfsDirectory, VfsDirectory>();
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}
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bool RealVfsDirectory::IsWritable() const {
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return (perms & Mode::WriteAppend) != 0;
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}
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bool RealVfsDirectory::IsReadable() const {
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return (perms & Mode::ReadWrite) != 0;
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}
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std::string RealVfsDirectory::GetName() const {
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return path_components.back();
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}
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std::shared_ptr<VfsDirectory> RealVfsDirectory::GetParentDirectory() const {
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if (path_components.size() <= 1)
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return nullptr;
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return base.OpenDirectory(parent_path, perms);
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}
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std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateSubdirectory(std::string_view name) {
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const std::string subdir_path = (path + DIR_SEP).append(name);
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return base.CreateDirectory(subdir_path, perms);
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}
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std::shared_ptr<VfsFile> RealVfsDirectory::CreateFile(std::string_view name) {
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const std::string file_path = (path + DIR_SEP).append(name);
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return base.CreateFile(file_path, perms);
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}
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bool RealVfsDirectory::DeleteSubdirectory(std::string_view name) {
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const std::string subdir_path = (path + DIR_SEP).append(name);
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return base.DeleteDirectory(subdir_path);
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}
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bool RealVfsDirectory::DeleteFile(std::string_view name) {
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const std::string file_path = (path + DIR_SEP).append(name);
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return base.DeleteFile(file_path);
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}
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bool RealVfsDirectory::Rename(std::string_view name) {
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const std::string new_name = (parent_path + DIR_SEP).append(name);
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return base.MoveFile(path, new_name) != nullptr;
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}
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std::string RealVfsDirectory::GetFullPath() const {
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auto out = path;
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std::replace(out.begin(), out.end(), '\\', '/');
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return out;
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}
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std::map<std::string, VfsEntryType> RealVfsDirectory::GetEntries() const {
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if (perms == Mode::Append)
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return {};
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std::map<std::string, VfsEntryType> out;
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FileUtil::ForeachDirectoryEntry(
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nullptr, path,
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[&out](u64* entries_out, const std::string& directory, const std::string& filename) {
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const std::string full_path = directory + DIR_SEP + filename;
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out.emplace(filename, FileUtil::IsDirectory(full_path) ? VfsEntryType::Directory
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: VfsEntryType::File);
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return true;
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});
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return out;
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}
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bool RealVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
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return false;
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}
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} // namespace FileSys
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