mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-20 22:53:06 +00:00
106 lines
3.9 KiB
C++
106 lines
3.9 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/>.
|
|
*/
|
|
#pragma once
|
|
#include "fs_common.hpp"
|
|
#include "fs_file.hpp"
|
|
#include "fs_operate_range.hpp"
|
|
|
|
namespace ams::fs {
|
|
|
|
class IStorage {
|
|
public:
|
|
virtual ~IStorage() { /* ... */ }
|
|
|
|
virtual Result Read(s64 offset, void *buffer, size_t size) = 0;
|
|
|
|
virtual Result Write(s64 offset, const void *buffer, size_t size) {
|
|
return fs::ResultUnsupportedOperation();
|
|
}
|
|
|
|
virtual Result Flush() = 0;
|
|
|
|
virtual Result SetSize(s64 size) {
|
|
return fs::ResultUnsupportedOperation();
|
|
}
|
|
|
|
virtual Result GetSize(s64 *out) = 0;
|
|
|
|
virtual Result OperateRange(void *dst, size_t dst_size, OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) {
|
|
return fs::ResultUnsupportedOperation();
|
|
}
|
|
|
|
virtual Result OperateRange(OperationId op_id, s64 offset, s64 size) {
|
|
return this->OperateRange(nullptr, 0, op_id, offset, size, nullptr, 0);
|
|
}
|
|
public:
|
|
static inline bool IsRangeValid(s64 offset, s64 size, s64 total_size) {
|
|
return offset >= 0 &&
|
|
size >= 0 &&
|
|
size <= total_size &&
|
|
offset <= (total_size - size);
|
|
}
|
|
|
|
static inline bool IsRangeValid(s64 offset, size_t size, s64 total_size) {
|
|
return IsRangeValid(offset, static_cast<s64>(size), total_size);
|
|
}
|
|
|
|
static inline bool IsOffsetAndSizeValid(s64 offset, s64 size) {
|
|
return offset >= 0 &&
|
|
size >= 0 &&
|
|
offset <= (offset + size);
|
|
}
|
|
|
|
static inline bool IsOffsetAndSizeValid(s64 offset, size_t size) {
|
|
return IsOffsetAndSizeValid(offset, static_cast<s64>(size));
|
|
}
|
|
};
|
|
|
|
class ReadOnlyStorageAdapter : public IStorage {
|
|
private:
|
|
std::shared_ptr<IStorage> shared_storage;
|
|
std::unique_ptr<IStorage> unique_storage;
|
|
IStorage *storage;
|
|
public:
|
|
ReadOnlyStorageAdapter(IStorage *s) : unique_storage(s) {
|
|
this->storage = this->unique_storage.get();
|
|
}
|
|
ReadOnlyStorageAdapter(std::shared_ptr<IStorage> s) : shared_storage(s) {
|
|
this->storage = this->shared_storage.get();
|
|
}
|
|
ReadOnlyStorageAdapter(std::unique_ptr<IStorage> s) : unique_storage(std::move(s)) {
|
|
this->storage = this->unique_storage.get();
|
|
}
|
|
|
|
virtual ~ReadOnlyStorageAdapter() { /* ... */ }
|
|
public:
|
|
virtual Result Read(s64 offset, void *buffer, size_t size) {
|
|
return this->storage->Read(offset, buffer, size);
|
|
}
|
|
|
|
virtual Result Flush() {
|
|
return this->storage->Flush();
|
|
}
|
|
|
|
virtual Result GetSize(s64 *out) {
|
|
return this->storage->GetSize(out);
|
|
}
|
|
|
|
virtual Result OperateRange(void *dst, size_t dst_size, OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) override {
|
|
return this->storage->OperateRange(dst, dst_size, op_id, offset, size, src, src_size);
|
|
}
|
|
};
|
|
|
|
}
|