316 lines
8.7 KiB
C++
316 lines
8.7 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 <numeric>
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#include "common/file_util.h"
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#include "common/logging/backend.h"
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#include "core/file_sys/vfs.h"
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namespace FileSys {
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VfsFile::~VfsFile() = default;
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std::string VfsFile::GetExtension() const {
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return std::string(FileUtil::GetExtensionFromFilename(GetName()));
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}
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VfsDirectory::~VfsDirectory() = default;
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boost::optional<u8> VfsFile::ReadByte(size_t offset) const {
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u8 out{};
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size_t size = Read(&out, 1, offset);
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if (size == 1)
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return out;
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return boost::none;
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}
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std::vector<u8> VfsFile::ReadBytes(size_t size, size_t offset) const {
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std::vector<u8> out(size);
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size_t read_size = Read(out.data(), size, offset);
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out.resize(read_size);
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return out;
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}
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std::vector<u8> VfsFile::ReadAllBytes() const {
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return ReadBytes(GetSize());
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}
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bool VfsFile::WriteByte(u8 data, size_t offset) {
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return Write(&data, 1, offset) == 1;
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}
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size_t VfsFile::WriteBytes(const std::vector<u8>& data, size_t offset) {
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return Write(data.data(), data.size(), offset);
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}
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std::string VfsFile::GetFullPath() const {
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if (GetContainingDirectory() == nullptr)
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return "/" + GetName();
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return GetContainingDirectory()->GetFullPath() + "/" + GetName();
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}
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std::shared_ptr<VfsFile> VfsDirectory::GetFileRelative(std::string_view path) const {
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auto vec = FileUtil::SplitPathComponents(path);
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vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
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vec.end());
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if (vec.empty()) {
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return nullptr;
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}
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if (vec.size() == 1) {
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return GetFile(vec[0]);
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}
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auto dir = GetSubdirectory(vec[0]);
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for (size_t component = 1; component < vec.size() - 1; ++component) {
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if (dir == nullptr) {
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return nullptr;
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}
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dir = dir->GetSubdirectory(vec[component]);
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}
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if (dir == nullptr) {
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return nullptr;
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}
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return dir->GetFile(vec.back());
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}
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std::shared_ptr<VfsFile> VfsDirectory::GetFileAbsolute(std::string_view path) const {
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if (IsRoot()) {
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return GetFileRelative(path);
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}
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return GetParentDirectory()->GetFileAbsolute(path);
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}
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std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryRelative(std::string_view path) const {
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auto vec = FileUtil::SplitPathComponents(path);
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vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
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vec.end());
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if (vec.empty()) {
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// TODO(DarkLordZach): Return this directory if path is '/' or similar. Can't currently
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// because of const-ness
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return nullptr;
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}
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auto dir = GetSubdirectory(vec[0]);
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for (size_t component = 1; component < vec.size(); ++component) {
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if (dir == nullptr) {
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return nullptr;
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}
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dir = dir->GetSubdirectory(vec[component]);
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}
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return dir;
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}
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std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryAbsolute(std::string_view path) const {
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if (IsRoot()) {
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return GetDirectoryRelative(path);
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}
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return GetParentDirectory()->GetDirectoryAbsolute(path);
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}
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std::shared_ptr<VfsFile> VfsDirectory::GetFile(std::string_view name) const {
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const auto& files = GetFiles();
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const auto iter = std::find_if(files.begin(), files.end(),
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[&name](const auto& file1) { return name == file1->GetName(); });
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return iter == files.end() ? nullptr : *iter;
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}
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std::shared_ptr<VfsDirectory> VfsDirectory::GetSubdirectory(std::string_view name) const {
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const auto& subs = GetSubdirectories();
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const auto iter = std::find_if(subs.begin(), subs.end(),
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[&name](const auto& file1) { return name == file1->GetName(); });
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return iter == subs.end() ? nullptr : *iter;
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}
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bool VfsDirectory::IsRoot() const {
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return GetParentDirectory() == nullptr;
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}
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size_t VfsDirectory::GetSize() const {
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const auto& files = GetFiles();
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const auto sum_sizes = [](const auto& range) {
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return std::accumulate(range.begin(), range.end(), 0ULL,
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[](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
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};
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const auto file_total = sum_sizes(files);
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const auto& sub_dir = GetSubdirectories();
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const auto subdir_total = sum_sizes(sub_dir);
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return file_total + subdir_total;
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}
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std::shared_ptr<VfsFile> VfsDirectory::CreateFileRelative(std::string_view path) {
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auto vec = FileUtil::SplitPathComponents(path);
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vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
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vec.end());
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if (vec.empty()) {
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return nullptr;
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}
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if (vec.size() == 1) {
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return CreateFile(vec[0]);
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}
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auto dir = GetSubdirectory(vec[0]);
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if (dir == nullptr) {
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dir = CreateSubdirectory(vec[0]);
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if (dir == nullptr) {
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return nullptr;
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}
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}
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return dir->CreateFileRelative(FileUtil::GetPathWithoutTop(path));
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}
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std::shared_ptr<VfsFile> VfsDirectory::CreateFileAbsolute(std::string_view path) {
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if (IsRoot()) {
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return CreateFileRelative(path);
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}
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return GetParentDirectory()->CreateFileAbsolute(path);
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}
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std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryRelative(std::string_view path) {
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auto vec = FileUtil::SplitPathComponents(path);
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vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
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vec.end());
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if (vec.empty()) {
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return nullptr;
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}
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if (vec.size() == 1) {
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return CreateSubdirectory(vec[0]);
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}
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auto dir = GetSubdirectory(vec[0]);
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if (dir == nullptr) {
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dir = CreateSubdirectory(vec[0]);
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if (dir == nullptr) {
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return nullptr;
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}
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}
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return dir->CreateDirectoryRelative(FileUtil::GetPathWithoutTop(path));
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}
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std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryAbsolute(std::string_view path) {
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if (IsRoot()) {
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return CreateDirectoryRelative(path);
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}
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return GetParentDirectory()->CreateDirectoryAbsolute(path);
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}
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bool VfsDirectory::DeleteSubdirectoryRecursive(std::string_view name) {
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auto dir = GetSubdirectory(name);
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if (dir == nullptr) {
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return false;
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}
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bool success = true;
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for (const auto& file : dir->GetFiles()) {
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if (!DeleteFile(file->GetName())) {
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success = false;
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}
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}
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for (const auto& sdir : dir->GetSubdirectories()) {
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if (!dir->DeleteSubdirectoryRecursive(sdir->GetName())) {
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success = false;
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}
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}
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return success;
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}
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bool VfsDirectory::Copy(std::string_view src, std::string_view dest) {
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const auto f1 = GetFile(src);
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auto f2 = CreateFile(dest);
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if (f1 == nullptr || f2 == nullptr) {
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return false;
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}
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if (!f2->Resize(f1->GetSize())) {
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DeleteFile(dest);
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return false;
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}
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return f2->WriteBytes(f1->ReadAllBytes()) == f1->GetSize();
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}
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std::string VfsDirectory::GetFullPath() const {
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if (IsRoot())
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return GetName();
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return GetParentDirectory()->GetFullPath() + "/" + GetName();
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}
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bool ReadOnlyVfsDirectory::IsWritable() const {
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return false;
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}
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bool ReadOnlyVfsDirectory::IsReadable() const {
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return true;
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}
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std::shared_ptr<VfsDirectory> ReadOnlyVfsDirectory::CreateSubdirectory(std::string_view name) {
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return nullptr;
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}
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std::shared_ptr<VfsFile> ReadOnlyVfsDirectory::CreateFile(std::string_view name) {
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return nullptr;
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}
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bool ReadOnlyVfsDirectory::DeleteSubdirectory(std::string_view name) {
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return false;
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}
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bool ReadOnlyVfsDirectory::DeleteFile(std::string_view name) {
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return false;
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}
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bool ReadOnlyVfsDirectory::Rename(std::string_view name) {
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return false;
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}
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bool DeepEquals(const VirtualFile& file1, const VirtualFile& file2, size_t block_size) {
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if (file1->GetSize() != file2->GetSize())
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return false;
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std::vector<u8> f1_v(block_size);
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std::vector<u8> f2_v(block_size);
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for (size_t i = 0; i < file1->GetSize(); i += block_size) {
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auto f1_vs = file1->Read(f1_v.data(), block_size, i);
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auto f2_vs = file2->Read(f2_v.data(), block_size, i);
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if (f1_vs != f2_vs)
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return false;
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auto iters = std::mismatch(f1_v.begin(), f1_v.end(), f2_v.begin(), f2_v.end());
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if (iters.first != f1_v.end() && iters.second != f2_v.end())
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return false;
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}
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return true;
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}
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bool VfsRawCopy(VirtualFile src, VirtualFile dest) {
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if (src == nullptr || dest == nullptr)
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return false;
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if (!dest->Resize(src->GetSize()))
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return false;
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std::vector<u8> data = src->ReadAllBytes();
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return dest->WriteBytes(data, 0) == data.size();
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}
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} // namespace FileSys
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