mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-24 19:26:04 +00:00
45 lines
1.6 KiB
C++
45 lines
1.6 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>
|
||
|
|
|
||
|
|
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();
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|