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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 <cstddef>
#include <iterator>
#include <utility>
#include "common/common_paths.h"
#include "common/logging/log.h"
#include "core/file_sys/vfs_real.h"
namespace FileSys {
static std::string ModeFlagsToString(Mode mode) {
std::string mode_str;
// Calculate the correct open mode for the file.
if (mode & Mode::Read && mode & Mode::Write) {
if (mode & Mode::Append)
mode_str = "a+";
else
mode_str = "r+";
} else {
if (mode & Mode::Read)
mode_str = "r";
else if (mode & Mode::Append)
mode_str = "a";
else if (mode & Mode::Write)
mode_str = "w";
}
mode_str += "b";
return mode_str;
}
RealVfsFile::RealVfsFile(const std::string& path_, Mode perms_)
: backing(path_, ModeFlagsToString(perms_).c_str()), path(path_),
parent_path(FileUtil::GetParentPath(path_)),
path_components(FileUtil::SplitPathComponents(path_)),
parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
perms(perms_) {}
std::string RealVfsFile::GetName() const {
return path_components.back();
}
size_t RealVfsFile::GetSize() const {
return backing.GetSize();
}
bool RealVfsFile::Resize(size_t new_size) {
return backing.Resize(new_size);
}
std::shared_ptr<VfsDirectory> RealVfsFile::GetContainingDirectory() const {
return std::make_shared<RealVfsDirectory>(parent_path, perms);
}
bool RealVfsFile::IsWritable() const {
return (perms & Mode::WriteAppend) != 0;
}
bool RealVfsFile::IsReadable() const {
return (perms & Mode::ReadWrite) != 0;
}
size_t RealVfsFile::Read(u8* data, size_t length, size_t offset) const {
if (!backing.Seek(offset, SEEK_SET))
return 0;
return backing.ReadBytes(data, length);
}
size_t RealVfsFile::Write(const u8* data, size_t length, size_t offset) {
if (!backing.Seek(offset, SEEK_SET))
return 0;
return backing.WriteBytes(data, length);
}
bool RealVfsFile::Rename(std::string_view name) {
std::string name_str(name.begin(), name.end());
const auto out = FileUtil::Rename(GetName(), name_str);
path = (parent_path + DIR_SEP).append(name);
path_components = parent_components;
path_components.push_back(std::move(name_str));
backing = FileUtil::IOFile(path, ModeFlagsToString(perms).c_str());
return out;
}
bool RealVfsFile::Close() {
return backing.Close();
}
RealVfsDirectory::RealVfsDirectory(const std::string& path_, Mode perms_)
: path(FileUtil::RemoveTrailingSlash(path_)), parent_path(FileUtil::GetParentPath(path)),
path_components(FileUtil::SplitPathComponents(path)),
parent_components(FileUtil::SliceVector(path_components, 0, path_components.size() - 1)),
perms(perms_) {
if (!FileUtil::Exists(path) && perms & Mode::WriteAppend)
FileUtil::CreateDir(path);
if (perms == Mode::Append)
return;
FileUtil::ForeachDirectoryEntry(
nullptr, path,
[this](u64* entries_out, const std::string& directory, const std::string& filename) {
std::string full_path = directory + DIR_SEP + filename;
if (FileUtil::IsDirectory(full_path))
subdirectories.emplace_back(std::make_shared<RealVfsDirectory>(full_path, perms));
else
files.emplace_back(std::make_shared<RealVfsFile>(full_path, perms));
return true;
});
}
std::vector<std::shared_ptr<VfsFile>> RealVfsDirectory::GetFiles() const {
return files;
}
std::vector<std::shared_ptr<VfsDirectory>> RealVfsDirectory::GetSubdirectories() const {
return subdirectories;
}
bool RealVfsDirectory::IsWritable() const {
return (perms & Mode::WriteAppend) != 0;
}
bool RealVfsDirectory::IsReadable() const {
return (perms & Mode::ReadWrite) != 0;
}
std::string RealVfsDirectory::GetName() const {
return path_components.back();
}
std::shared_ptr<VfsDirectory> RealVfsDirectory::GetParentDirectory() const {
if (path_components.size() <= 1)
return nullptr;
return std::make_shared<RealVfsDirectory>(parent_path, perms);
}
std::shared_ptr<VfsDirectory> RealVfsDirectory::CreateSubdirectory(std::string_view name) {
const std::string subdir_path = (path + DIR_SEP).append(name);
if (!FileUtil::CreateDir(subdir_path)) {
return nullptr;
}
subdirectories.emplace_back(std::make_shared<RealVfsDirectory>(subdir_path, perms));
return subdirectories.back();
}
std::shared_ptr<VfsFile> RealVfsDirectory::CreateFile(std::string_view name) {
const std::string file_path = (path + DIR_SEP).append(name);
if (!FileUtil::CreateEmptyFile(file_path)) {
return nullptr;
}
files.emplace_back(std::make_shared<RealVfsFile>(file_path, perms));
return files.back();
}
bool RealVfsDirectory::DeleteSubdirectory(std::string_view name) {
const std::string subdir_path = (path + DIR_SEP).append(name);
return FileUtil::DeleteDirRecursively(subdir_path);
}
bool RealVfsDirectory::DeleteFile(std::string_view name) {
const auto file = GetFile(name);
if (file == nullptr) {
return false;
}
files.erase(std::find(files.begin(), files.end(), file));
auto real_file = std::static_pointer_cast<RealVfsFile>(file);
real_file->Close();
const std::string file_path = (path + DIR_SEP).append(name);
return FileUtil::Delete(file_path);
}
bool RealVfsDirectory::Rename(std::string_view name) {
const std::string new_name = (parent_path + DIR_SEP).append(name);
return FileUtil::Rename(path, new_name);
}
std::string RealVfsDirectory::GetFullPath() const {
auto out = path;
std::replace(out.begin(), out.end(), '\\', '/');
return out;
}
bool RealVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
const auto iter = std::find(files.begin(), files.end(), file);
if (iter == files.end())
return false;
const std::ptrdiff_t offset = std::distance(files.begin(), iter);
files[offset] = files.back();
files.pop_back();
subdirectories.emplace_back(std::move(dir));
return true;
}
} // namespace FileSys
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