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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include <vector>
#include "common/common_types.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/file_sys/archive_extsavedata.h"
#include "core/file_sys/disk_archive.h"
#include "core/hle/service/fs/archive.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// FileSys namespace
namespace FileSys {
std::string GetExtSaveDataPath(const std::string& mount_point, const Path& path) {
std::vector<u8> vec_data = path.AsBinary();
const u32* data = reinterpret_cast<const u32*>(vec_data.data());
u32 save_low = data[1];
u32 save_high = data[2];
return Common::StringFromFormat("%s%08X/%08X/", mount_point.c_str(), save_high, save_low);
}
std::string GetExtDataContainerPath(const std::string& mount_point, bool shared) {
if (shared)
return Common::StringFromFormat("%sdata/%s/extdata/", mount_point.c_str(), SYSTEM_ID.c_str());
return Common::StringFromFormat("%sNintendo 3DS/%s/%s/extdata/", mount_point.c_str(),
SYSTEM_ID.c_str(), SDCARD_ID.c_str());
}
Path ConstructExtDataBinaryPath(u32 media_type, u32 high, u32 low) {
std::vector<u8> binary_path;
binary_path.reserve(12);
// Append each word byte by byte
// The first word is the media type
for (unsigned i = 0; i < 4; ++i)
binary_path.push_back((media_type >> (8 * i)) & 0xFF);
// Next is the low word
for (unsigned i = 0; i < 4; ++i)
binary_path.push_back((low >> (8 * i)) & 0xFF);
// Next is the high word
for (unsigned i = 0; i < 4; ++i)
binary_path.push_back((high >> (8 * i)) & 0xFF);
return { binary_path };
}
ArchiveFactory_ExtSaveData::ArchiveFactory_ExtSaveData(const std::string& mount_location, bool shared)
: shared(shared), mount_point(GetExtDataContainerPath(mount_location, shared)) {
LOG_INFO(Service_FS, "Directory %s set as base for ExtSaveData.", mount_point.c_str());
}
bool ArchiveFactory_ExtSaveData::Initialize() {
if (!FileUtil::CreateFullPath(mount_point)) {
LOG_ERROR(Service_FS, "Unable to create ExtSaveData base path.");
return false;
}
return true;
}
ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_ExtSaveData::Open(const Path& path) {
std::string fullpath = GetExtSaveDataPath(mount_point, path) + "user/";
if (!FileUtil::Exists(fullpath)) {
// TODO(Subv): Verify the archive behavior of SharedExtSaveData compared to ExtSaveData.
// ExtSaveData seems to return FS_NotFound (120) when the archive doesn't exist.
if (!shared) {
return ResultCode(ErrorDescription::FS_NotFound, ErrorModule::FS,
ErrorSummary::InvalidState, ErrorLevel::Status);
} else {
return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
ErrorSummary::InvalidState, ErrorLevel::Status);
}
}
auto archive = std::make_unique<DiskArchive>(fullpath);
return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
}
ResultCode ArchiveFactory_ExtSaveData::Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
// These folders are always created with the ExtSaveData
std::string user_path = GetExtSaveDataPath(mount_point, path) + "user/";
std::string boss_path = GetExtSaveDataPath(mount_point, path) + "boss/";
FileUtil::CreateFullPath(user_path);
FileUtil::CreateFullPath(boss_path);
// Write the format metadata
std::string metadata_path = GetExtSaveDataPath(mount_point, path) + "metadata";
FileUtil::IOFile file(metadata_path, "wb");
if (!file.IsOpen()) {
// TODO(Subv): Find the correct error code
return ResultCode(-1);
}
file.WriteBytes(&format_info, sizeof(format_info));
return RESULT_SUCCESS;
}
ResultVal<ArchiveFormatInfo> ArchiveFactory_ExtSaveData::GetFormatInfo(const Path& path) const {
std::string metadata_path = GetExtSaveDataPath(mount_point, path) + "metadata";
FileUtil::IOFile file(metadata_path, "rb");
if (!file.IsOpen()) {
LOG_ERROR(Service_FS, "Could not open metadata information for archive");
// TODO(Subv): Verify error code
return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS, ErrorSummary::InvalidState, ErrorLevel::Status);
}
ArchiveFormatInfo info = {};
file.ReadBytes(&info, sizeof(info));
return MakeResult<ArchiveFormatInfo>(info);
}
void ArchiveFactory_ExtSaveData::WriteIcon(const Path& path, const u8* icon_data, size_t icon_size) {
std::string game_path = FileSys::GetExtSaveDataPath(GetMountPoint(), path);
FileUtil::IOFile icon_file(game_path + "icon", "wb");
icon_file.WriteBytes(icon_data, icon_size);
}
} // namespace FileSys
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