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fs: implement FileHandleStorage

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This commit is contained in:
Adubbz 2020-03-27 23:37:47 +11:00
parent 3d518759da
commit b3077c4a1a
4 changed files with 146 additions and 0 deletions
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1
libraries/libstratosphere/include/stratosphere/fs.hpp
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@ -28,6 +28,7 @@
#include <stratosphere/fs/fs_memory_storage.hpp>
#include <stratosphere/fs/fs_remote_storage.hpp>
#include <stratosphere/fs/fs_file_storage.hpp>
#include <stratosphere/fs/fs_file_handle_storage.hpp>
#include <stratosphere/fs/fs_query_range.hpp>
#include <stratosphere/fs/impl/fs_common_mount_name.hpp>
#include <stratosphere/fs/fs_mount.hpp>

53
libraries/libstratosphere/include/stratosphere/fs/fs_file_handle_storage.hpp Normal file
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@ -0,0 +1,53 @@
/*
* Copyright (c) 2018-2020 Adubbz, 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/>.
*/
#pragma once
#include "fs_common.hpp"
#include "fs_istorage.hpp"
namespace ams::fs {
class FileHandleStorage : public IStorage {
private:
static constexpr s64 InvalidSize = -1;
private:
FileHandle handle;
bool close_file;
s64 size;
os::Mutex mutex;
public:
FileHandleStorage(FileHandle handle) : FileHandleStorage(handle, false) { /* ... */ }
FileHandleStorage(FileHandle handle, bool close_file) : handle(handle), close_file(close_file), size(InvalidSize) {
/* ... */
}
virtual ~FileHandleStorage() {
if (this->close_file) {
CloseFile(this->handle);
}
}
protected:
Result UpdateSize();
public:
virtual Result Read(s64 offset, void *buffer, size_t size) override;
virtual Result Write(s64 offset, const void *buffer, size_t size) override;
virtual Result Flush() override;
virtual Result GetSize(s64 *out_size) override;
virtual Result SetSize(s64 size) override;
virtual Result OperateRange(void *dst, size_t dst_size, OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) override;
};
}

91
libraries/libstratosphere/source/fs/fs_file_handle_storage.cpp Normal file
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@ -0,0 +1,91 @@
/*
* Copyright (c) 2018-2020 Adubbz, 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::fs {
Result FileHandleStorage::UpdateSize() {
R_SUCCEED_IF(this->size != InvalidSize);
return GetFileSize(std::addressof(this->size), this->handle);
}
Result FileHandleStorage::Read(s64 offset, void *buffer, size_t size) {
/* Lock the mutex. */
std::scoped_lock lk(this->mutex);
/* Immediately succeed if there's nothing to read. */
R_SUCCEED_IF(size == 0);
/* Validate buffer. */
R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
/* Ensure our size is valid. */
R_TRY(this->UpdateSize());
/* Ensure our access is valid. */
R_UNLESS(IStorage::IsRangeValid(offset, size, this->size), fs::ResultOutOfRange());
return ReadFile(this->handle, offset, buffer, size, fs::ReadOption());
}
Result FileHandleStorage::Write(s64 offset, const void *buffer, size_t size) {
/* Lock the mutex. */
std::scoped_lock lk(this->mutex);
/* Immediately succeed if there's nothing to write. */
R_SUCCEED_IF(size == 0);
/* Validate buffer. */
R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
/* Ensure our size is valid. */
R_TRY(this->UpdateSize());
/* Ensure our access is valid. */
R_UNLESS(IStorage::IsRangeValid(offset, size, this->size), fs::ResultOutOfRange());
return WriteFile(this->handle, offset, buffer, size, fs::WriteOption());
}
Result FileHandleStorage::Flush() {
return FlushFile(this->handle);
}
Result FileHandleStorage::GetSize(s64 *out_size) {
R_TRY(this->UpdateSize());
*out_size = this->size;
return ResultSuccess();
}
Result FileHandleStorage::SetSize(s64 size) {
this->size = InvalidSize;
return SetFileSize(this->handle, size);
}
Result FileHandleStorage::OperateRange(void *dst, size_t dst_size, OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) {
switch (op_id) {
case OperationId::QueryRange:
/* Validate buffer and size. */
R_UNLESS(dst != nullptr, fs::ResultNullptrArgument());
R_UNLESS(dst_size == sizeof(QueryRangeInfo), fs::ResultInvalidSize());
return QueryRange(static_cast<QueryRangeInfo *>(dst), this->handle, offset, size);
default:
return fs::ResultUnsupportedOperationInFileStorageB();
}
}
}

1
libraries/libvapours/include/vapours/results/fs_results.hpp
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@ -254,6 +254,7 @@ namespace ams::fs {
R_DEFINE_ERROR_RESULT(UnsupportedOperationInMemoryStorageA, 6304);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInMemoryStorageB, 6305);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInFileStorageA, 6306);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInFileStorageB, 6307);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInFileServiceObjectAdapterA, 6362);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInRomFsFileSystemA, 6364);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInRomFsFileSystemB, 6365);