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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <numeric>
#include "common/file_util.h"
#include "common/logging/backend.h"
#include "core/file_sys/vfs.h"
namespace FileSys {
VfsFile::~VfsFile() = default;
std::string VfsFile::GetExtension() const {
return FileUtil::GetExtensionFromFilename(GetName());
}
VfsDirectory::~VfsDirectory() = default;
boost::optional<u8> VfsFile::ReadByte(size_t offset) const {
u8 out{};
size_t size = Read(&out, 1, offset);
if (size == 1)
return out;
return boost::none;
}
std::vector<u8> VfsFile::ReadBytes(size_t size, size_t offset) const {
std::vector<u8> out(size);
size_t read_size = Read(out.data(), size, offset);
out.resize(read_size);
return out;
}
std::vector<u8> VfsFile::ReadAllBytes() const {
return ReadBytes(GetSize());
}
bool VfsFile::WriteByte(u8 data, size_t offset) {
return Write(&data, 1, offset) == 1;
}
size_t VfsFile::WriteBytes(std::vector<u8> data, size_t offset) {
return Write(data.data(), data.size(), offset);
}
std::shared_ptr<VfsFile> VfsDirectory::GetFileRelative(const std::string& path) const {
auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end());
if (vec.empty())
return nullptr;
if (vec.size() == 1)
return GetFile(vec[0]);
auto dir = GetSubdirectory(vec[0]);
for (size_t component = 1; component < vec.size() - 1; ++component) {
if (dir == nullptr)
return nullptr;
dir = dir->GetSubdirectory(vec[component]);
}
if (dir == nullptr)
return nullptr;
return dir->GetFile(vec.back());
}
std::shared_ptr<VfsFile> VfsDirectory::GetFileAbsolute(const std::string& path) const {
if (IsRoot())
return GetFileRelative(path);
return GetParentDirectory()->GetFileAbsolute(path);
}
std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryRelative(const std::string& path) const {
auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end());
if (vec.empty())
// TODO(DarkLordZach): Return this directory if path is '/' or similar. Can't currently
// because of const-ness
return nullptr;
auto dir = GetSubdirectory(vec[0]);
for (size_t component = 1; component < vec.size(); ++component) {
if (dir == nullptr)
return nullptr;
dir = dir->GetSubdirectory(vec[component]);
}
return dir;
}
std::shared_ptr<VfsDirectory> VfsDirectory::GetDirectoryAbsolute(const std::string& path) const {
if (IsRoot())
return GetDirectoryRelative(path);
return GetParentDirectory()->GetDirectoryAbsolute(path);
}
std::shared_ptr<VfsFile> VfsDirectory::GetFile(const std::string& name) const {
const auto& files = GetFiles();
const auto iter = std::find_if(files.begin(), files.end(),
[&name](const auto& file1) { return name == file1->GetName(); });
return iter == files.end() ? nullptr : *iter;
}
std::shared_ptr<VfsDirectory> VfsDirectory::GetSubdirectory(const std::string& name) const {
const auto& subs = GetSubdirectories();
const auto iter = std::find_if(subs.begin(), subs.end(),
[&name](const auto& file1) { return name == file1->GetName(); });
return iter == subs.end() ? nullptr : *iter;
}
bool VfsDirectory::IsRoot() const {
return GetParentDirectory() == nullptr;
}
size_t VfsDirectory::GetSize() const {
const auto& files = GetFiles();
const auto sum_sizes = [](const auto& range) {
return std::accumulate(range.begin(), range.end(), 0ULL,
[](const auto& f1, const auto& f2) { return f1 + f2->GetSize(); });
};
const auto file_total = sum_sizes(files);
const auto& sub_dir = GetSubdirectories();
const auto subdir_total = sum_sizes(sub_dir);
return file_total + subdir_total;
}
std::shared_ptr<VfsFile> VfsDirectory::CreateFileRelative(const std::string& path) {
auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end());
if (vec.empty())
return nullptr;
if (vec.size() == 1)
return CreateFile(vec[0]);
auto dir = GetSubdirectory(vec[0]);
if (dir == nullptr) {
dir = CreateSubdirectory(vec[0]);
if (dir == nullptr)
return nullptr;
}
return dir->CreateFileRelative(FileUtil::GetPathWithoutTop(path));
}
std::shared_ptr<VfsFile> VfsDirectory::CreateFileAbsolute(const std::string& path) {
if (IsRoot())
return CreateFileRelative(path);
return GetParentDirectory()->CreateFileAbsolute(path);
}
std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryRelative(const std::string& path) {
auto vec = FileUtil::SplitPathComponents(path);
vec.erase(std::remove_if(vec.begin(), vec.end(), [](const auto& str) { return str.empty(); }),
vec.end());
if (vec.empty())
return nullptr;
if (vec.size() == 1)
return CreateSubdirectory(vec[0]);
auto dir = GetSubdirectory(vec[0]);
if (dir == nullptr) {
dir = CreateSubdirectory(vec[0]);
if (dir == nullptr)
return nullptr;
}
return dir->CreateDirectoryRelative(FileUtil::GetPathWithoutTop(path));
}
std::shared_ptr<VfsDirectory> VfsDirectory::CreateDirectoryAbsolute(const std::string& path) {
if (IsRoot())
return CreateDirectoryRelative(path);
return GetParentDirectory()->CreateDirectoryAbsolute(path);
}
bool VfsDirectory::DeleteSubdirectoryRecursive(const std::string& name) {
auto dir = GetSubdirectory(name);
if (dir == nullptr)
return false;
bool success = true;
for (const auto& file : dir->GetFiles()) {
if (!DeleteFile(file->GetName()))
success = false;
}
for (const auto& sdir : dir->GetSubdirectories()) {
if (!dir->DeleteSubdirectoryRecursive(sdir->GetName()))
success = false;
}
return success;
}
bool VfsDirectory::Copy(const std::string& src, const std::string& dest) {
const auto f1 = GetFile(src);
auto f2 = CreateFile(dest);
if (f1 == nullptr || f2 == nullptr)
return false;
if (!f2->Resize(f1->GetSize())) {
DeleteFile(dest);
return false;
}
return f2->WriteBytes(f1->ReadAllBytes()) == f1->GetSize();
}
bool ReadOnlyVfsDirectory::IsWritable() const {
return false;
}
bool ReadOnlyVfsDirectory::IsReadable() const {
return true;
}
std::shared_ptr<VfsDirectory> ReadOnlyVfsDirectory::CreateSubdirectory(const std::string& name) {
return nullptr;
}
std::shared_ptr<VfsFile> ReadOnlyVfsDirectory::CreateFile(const std::string& name) {
return nullptr;
}
bool ReadOnlyVfsDirectory::DeleteSubdirectory(const std::string& name) {
return false;
}
bool ReadOnlyVfsDirectory::DeleteFile(const std::string& name) {
return false;
}
bool ReadOnlyVfsDirectory::Rename(const std::string& name) {
return false;
}
} // namespace FileSys
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