Atmosphere/libraries/libstratosphere/source/fs/fs_game_card.cpp

88 lines
3.8 KiB
C++

/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "fsa/fs_mount_utils.hpp"
namespace ams::fs {
namespace {
const char *GetGameCardMountNameSuffix(GameCardPartition which) {
switch (which) {
case GameCardPartition::Update: return impl::GameCardFileSystemMountNameUpdateSuffix;
case GameCardPartition::Normal: return impl::GameCardFileSystemMountNameNormalSuffix;
case GameCardPartition::Secure: return impl::GameCardFileSystemMountNameSecureSuffix;
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
class GameCardCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
private:
const GameCardHandle handle;
const GameCardPartition partition;
public:
explicit GameCardCommonMountNameGenerator(GameCardHandle h, GameCardPartition p) : handle(h), partition(p) { /* ... */ }
virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
/* Determine how much space we need. */
const size_t needed_size = strnlen(impl::GameCardFileSystemMountName, MountNameLengthMax) + strnlen(GetGameCardMountNameSuffix(this->partition), MountNameLengthMax) + sizeof(GameCardHandle) * 2 + 2;
AMS_ABORT_UNLESS(dst_size >= needed_size);
/* Generate the name. */
auto size = util::SNPrintf(dst, dst_size, "%s%s%08x:", impl::GameCardFileSystemMountName, GetGameCardMountNameSuffix(this->partition), this->handle);
AMS_ASSERT(static_cast<size_t>(size) == needed_size - 1);
return ResultSuccess();
}
};
}
Result GetGameCardHandle(GameCardHandle *out) {
/* TODO: fs::DeviceOperator */
/* Open a DeviceOperator. */
::FsDeviceOperator d;
R_TRY(fsOpenDeviceOperator(std::addressof(d)));
ON_SCOPE_EXIT { fsDeviceOperatorClose(std::addressof(d)); };
/* Get the handle. */
static_assert(sizeof(GameCardHandle) == sizeof(::FsGameCardHandle));
return fsDeviceOperatorGetGameCardHandle(std::addressof(d), reinterpret_cast<::FsGameCardHandle *>(out));
}
Result MountGameCardPartition(const char *name, GameCardHandle handle, GameCardPartition partition) {
/* Validate the mount name. */
R_TRY(impl::CheckMountNameAllowingReserved(name));
/* Open gamecard filesystem. This uses libnx bindings. */
::FsFileSystem fs;
const ::FsGameCardHandle _hnd = {handle};
R_TRY(fsOpenGameCardFileSystem(std::addressof(fs), std::addressof(_hnd), static_cast<::FsGameCardPartition>(partition)));
/* Allocate a new filesystem wrapper. */
auto fsa = std::make_unique<RemoteFileSystem>(fs);
R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInGameCardC());
/* Allocate a new mountname generator. */
auto generator = std::make_unique<GameCardCommonMountNameGenerator>(handle, partition);
R_UNLESS(generator != nullptr, fs::ResultAllocationFailureInGameCardD());
/* Register. */
return fsa::Register(name, std::move(fsa), std::move(generator));
}
}