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