/* * 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> namespace ams::fssystem { Result SparseStorage::Read(s64 offset, void *buffer, size_t size) { /* Validate preconditions. */ AMS_ASSERT(offset >= 0); AMS_ASSERT(this->IsInitialized()); /* Allow zero size. */ R_SUCCEED_IF(size == 0); /* Validate arguments. */ R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument()); if (this->GetEntryTable().IsEmpty()) { R_UNLESS(this->GetEntryTable().Includes(offset, size), fs::ResultOutOfRange()); std::memset(buffer, 0, size); } else { R_TRY(this->OperatePerEntry<false>(offset, size, [=](fs::IStorage *storage, s64 data_offset, s64 cur_offset, s64 cur_size) -> Result { R_TRY(storage->Read(data_offset, reinterpret_cast<u8 *>(buffer) + (cur_offset - offset), static_cast<size_t>(cur_size))); return ResultSuccess(); })); } return ResultSuccess(); } }