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107 lines
3.9 KiB
C++
107 lines
3.9 KiB
C++
// Copyright 2016 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 <memory>
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#include "common/archives.h"
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#include "common/file_util.h"
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#include "core/file_sys/archive_sdmcwriteonly.h"
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#include "core/file_sys/directory_backend.h"
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#include "core/file_sys/errors.h"
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#include "core/file_sys/file_backend.h"
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#include "core/settings.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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SERIALIZE_EXPORT_IMPL(FileSys::SDMCWriteOnlyArchive)
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SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SDMCWriteOnly)
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namespace FileSys {
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class SDMCWriteOnlyDelayGenerator : public DelayGenerator {
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public:
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u64 GetReadDelayNs(std::size_t length) override {
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// This is the delay measured on O3DS and O2DS with
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// https://gist.github.com/B3n30/ac40eac20603f519ff106107f4ac9182
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// from the results the average of each length was taken.
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static constexpr u64 slope(183);
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static constexpr u64 offset(524879);
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static constexpr u64 minimum(631826);
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u64 IPCDelayNanoseconds = std::max<u64>(static_cast<u64>(length) * slope + offset, minimum);
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return IPCDelayNanoseconds;
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}
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u64 GetOpenDelayNs() override {
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// This is the delay measured on O3DS and O2DS with
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// https://gist.github.com/FearlessTobi/c37e143c314789251f98f2c45cd706d2
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// from the results the average of each length was taken.
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static constexpr u64 IPCDelayNanoseconds(269082);
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return IPCDelayNanoseconds;
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}
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SERIALIZE_DELAY_GENERATOR
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};
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ResultVal<std::unique_ptr<FileBackend>> SDMCWriteOnlyArchive::OpenFile(const Path& path,
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const Mode& mode) const {
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if (mode.read_flag) {
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LOG_ERROR(Service_FS, "Read flag is not supported");
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return ERROR_INVALID_READ_FLAG;
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}
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return SDMCArchive::OpenFileBase(path, mode);
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}
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ResultVal<std::unique_ptr<DirectoryBackend>> SDMCWriteOnlyArchive::OpenDirectory(
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const Path& path) const {
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LOG_ERROR(Service_FS, "Not supported");
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return ERROR_UNSUPPORTED_OPEN_FLAGS;
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}
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ArchiveFactory_SDMCWriteOnly::ArchiveFactory_SDMCWriteOnly(const std::string& mount_point)
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: sdmc_directory(mount_point) {
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LOG_DEBUG(Service_FS, "Directory {} set as SDMCWriteOnly.", sdmc_directory);
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}
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bool ArchiveFactory_SDMCWriteOnly::Initialize() {
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if (!Settings::values.use_virtual_sd) {
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LOG_WARNING(Service_FS, "SDMC disabled by config.");
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return false;
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}
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if (!FileUtil::CreateFullPath(sdmc_directory)) {
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LOG_ERROR(Service_FS, "Unable to create SDMC 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_SDMCWriteOnly::Open(const Path& path,
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u64 program_id) {
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std::unique_ptr<DelayGenerator> delay_generator =
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std::make_unique<SDMCWriteOnlyDelayGenerator>();
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auto archive =
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std::make_unique<SDMCWriteOnlyArchive>(sdmc_directory, std::move(delay_generator));
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return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
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}
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ResultCode ArchiveFactory_SDMCWriteOnly::Format(const Path& path,
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const FileSys::ArchiveFormatInfo& format_info,
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u64 program_id) {
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// TODO(wwylele): hwtest this
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LOG_ERROR(Service_FS, "Attempted to format a SDMC write-only archive.");
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return ResultCode(-1);
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}
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ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMCWriteOnly::GetFormatInfo(const Path& path,
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u64 program_id) const {
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// TODO(Subv): Implement
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LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
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return ResultCode(-1);
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}
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} // namespace FileSys
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SERIALIZE_EXPORT_IMPL(FileSys::SDMCWriteOnlyDelayGenerator)
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