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// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "common/common_types.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/fs_directory.h"
#include "core/file_sys/fs_file.h"
#include "core/file_sys/fs_filesystem.h"
#include "core/file_sys/savedata_factory.h"
#include "core/file_sys/vfs/vfs.h"
#include "core/hle/result.h"
namespace FileSys::Fsa {
class IDirectory {
public:
IDirectory(VirtualDir backend_, OpenDirectoryMode mode) : backend(std::move(backend_)) {
// TODO(DarkLordZach): Verify that this is the correct behavior.
// Build entry index now to save time later.
if (True(mode & OpenDirectoryMode::Directory)) {
BuildEntryIndex(entries, backend->GetSubdirectories(), DirectoryEntryType::Directory);
}
if (True(mode & OpenDirectoryMode::File)) {
BuildEntryIndex(entries, backend->GetFiles(), DirectoryEntryType::File);
}
}
virtual ~IDirectory() {}
Result Read(s64* out_count, DirectoryEntry* out_entries, s64 max_entries) {
R_UNLESS(out_count != nullptr, ResultNullptrArgument);
if (max_entries == 0) {
*out_count = 0;
R_SUCCEED();
}
R_UNLESS(out_entries != nullptr, ResultNullptrArgument);
R_UNLESS(max_entries > 0, ResultInvalidArgument);
R_RETURN(this->DoRead(out_count, out_entries, max_entries));
}
Result GetEntryCount(s64* out) {
R_UNLESS(out != nullptr, ResultNullptrArgument);
R_RETURN(this->DoGetEntryCount(out));
}
private:
virtual Result DoRead(s64* out_count, DirectoryEntry* out_entries, s64 max_entries) {
const u64 actual_entries =
std::min(static_cast<u64>(max_entries), entries.size() - next_entry_index);
auto* begin = reinterpret_cast<u8*>(entries.data() + next_entry_index);
next_entry_index += actual_entries;
*out_count = actual_entries;
out_entries = reinterpret_cast<DirectoryEntry*>(begin);
R_SUCCEED();
}
virtual Result DoGetEntryCount(s64* out) {
*out = entries.size() - next_entry_index;
R_SUCCEED();
}
// TODO: Remove this when VFS is gone
template <typename T>
void BuildEntryIndex(std::vector<DirectoryEntry>& entries, const std::vector<T>& new_data,
DirectoryEntryType type) {
entries.reserve(entries.size() + new_data.size());
for (const auto& new_entry : new_data) {
auto name = new_entry->GetName();
if (type == DirectoryEntryType::File && name == GetSaveDataSizeFileName()) {
continue;
}
entries.emplace_back(name, static_cast<s8>(type),
type == DirectoryEntryType::Directory ? 0 : new_entry->GetSize());
}
}
VirtualDir backend;
std::vector<DirectoryEntry> entries;
u64 next_entry_index = 0;
};
} // namespace FileSys::Fsa
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