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

89 lines
3.7 KiB
C++

/*
* Copyright (c) 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::impl {
namespace {
Result OpenDataStorageByDataId(std::unique_ptr<ams::fs::IStorage> *out, ncm::DataId data_id, ncm::StorageId storage_id) {
/* Open storage using libnx bindings. */
::FsStorage s;
R_TRY_CATCH(fsOpenDataStorageByDataId(std::addressof(s), data_id.value, static_cast<::NcmStorageId>(storage_id))) {
R_CONVERT(ncm::ResultContentMetaNotFound, fs::ResultTargetNotFound());
} R_END_TRY_CATCH;
auto storage = std::make_unique<RemoteStorage>(s);
R_UNLESS(storage != nullptr, fs::ResultAllocationFailureInDataA());
*out = std::move(storage);
return ResultSuccess();
}
Result MountDataImpl(const char *name, ncm::DataId data_id, ncm::StorageId storage_id, void *cache_buffer, size_t cache_size, bool use_cache, bool use_data_cache, bool use_path_cache) {
std::unique_ptr<fs::IStorage> storage;
R_TRY(OpenDataStorageByDataId(std::addressof(storage), data_id, storage_id));
auto fs = std::make_unique<RomFsFileSystem>();
R_UNLESS(fs != nullptr, fs::ResultAllocationFailureInDataB());
R_TRY(fs->Initialize(std::move(storage), cache_buffer, cache_size, use_cache));
return fsa::Register(name, std::move(fs), nullptr, use_data_cache, use_path_cache, false);
}
}
Result QueryMountDataCacheSize(size_t *out, ncm::DataId data_id, ncm::StorageId storage_id) {
R_UNLESS(out != nullptr, fs::ResultNullptrArgument());
std::unique_ptr<fs::IStorage> storage;
R_TRY(OpenDataStorageByDataId(std::addressof(storage), data_id, storage_id));
size_t size = 0;
R_TRY(RomFsFileSystem::GetRequiredWorkingMemorySize(std::addressof(size), storage.get()));
constexpr size_t MinimumCacheSize = 32;
*out = std::max(size, MinimumCacheSize);
return ResultSuccess();
}
Result MountData(const char *name, ncm::DataId data_id, ncm::StorageId storage_id) {
/* Validate the mount name. */
R_TRY(impl::CheckMountName(name));
return MountDataImpl(name, data_id, storage_id, nullptr, 0, false, false, false);
}
Result MountData(const char *name, ncm::DataId data_id, ncm::StorageId storage_id, void *cache_buffer, size_t cache_size) {
/* Validate the mount name. */
R_TRY(impl::CheckMountName(name));
R_UNLESS(cache_buffer != nullptr, fs::ResultNullptrArgument());
return MountDataImpl(name, data_id, storage_id, cache_buffer, cache_size, true, false, false);
}
Result MountData(const char *name, ncm::DataId data_id, ncm::StorageId storage_id, void *cache_buffer, size_t cache_size, bool use_data_cache, bool use_path_cache) {
/* Validate the mount name. */
R_TRY(impl::CheckMountName(name));
R_UNLESS(cache_buffer != nullptr, fs::ResultNullptrArgument());
return MountDataImpl(name, data_id, storage_id, cache_buffer, cache_size, true, use_data_cache, use_path_cache);
}
}