mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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94 lines
3.4 KiB
C++
94 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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namespace ams::fs {
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Result FileStorage::UpdateSize() {
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R_UNLESS(this->size == InvalidSize, ResultSuccess());
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return this->base_file->GetSize(&this->size);
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}
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Result FileStorage::Read(s64 offset, void *buffer, size_t size) {
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/* Immediately succeed if there's nothing to read. */
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R_UNLESS(size > 0, ResultSuccess());
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/* Validate buffer. */
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R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
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/* Ensure our size is valid. */
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R_TRY(this->UpdateSize());
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/* Ensure our access is valid. */
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R_UNLESS(IStorage::IsRangeValid(offset, size, this->size), fs::ResultOutOfRange());
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size_t read_size;
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return this->base_file->Read(&read_size, offset, buffer, size);
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}
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Result FileStorage::Write(s64 offset, const void *buffer, size_t size) {
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/* Immediately succeed if there's nothing to write. */
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R_UNLESS(size > 0, ResultSuccess());
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/* Validate buffer. */
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R_UNLESS(buffer != nullptr, fs::ResultNullptrArgument());
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/* Ensure our size is valid. */
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R_TRY(this->UpdateSize());
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/* Ensure our access is valid. */
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R_UNLESS(IStorage::IsRangeValid(offset, size, this->size), fs::ResultOutOfRange());
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return this->base_file->Write(offset, buffer, size, fs::WriteOption());
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}
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Result FileStorage::Flush() {
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return this->base_file->Flush();
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}
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Result FileStorage::GetSize(s64 *out_size) {
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R_TRY(this->UpdateSize());
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*out_size = this->size;
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return ResultSuccess();
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}
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Result FileStorage::SetSize(s64 size) {
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this->size = InvalidSize;
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return this->base_file->SetSize(size);
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}
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Result FileStorage::OperateRange(void *dst, size_t dst_size, OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) {
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switch (op_id) {
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case OperationId::InvalidateCache:
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case OperationId::QueryRange:
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if (size == 0) {
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if (op_id == OperationId::QueryRange) {
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R_UNLESS(dst != nullptr, fs::ResultNullptrArgument());
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R_UNLESS(dst_size == sizeof(QueryRangeInfo), fs::ResultInvalidSize());
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reinterpret_cast<QueryRangeInfo *>(dst)->Clear();
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}
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return ResultSuccess();
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}
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R_TRY(this->UpdateSize());
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R_UNLESS(IStorage::IsOffsetAndSizeValid(offset, size), fs::ResultOutOfRange());
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return this->base_file->OperateRange(dst, dst_size, op_id, offset, size, src, src_size);
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default:
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return fs::ResultUnsupportedOperation();
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}
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}
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}
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