Atmosphere/libraries/libstratosphere/include/stratosphere/kvdb/kvdb_auto_buffer.hpp

90 lines
2.6 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/>.
*/
#pragma once
#include <vapours.hpp>
namespace ams::kvdb {
class AutoBuffer {
NON_COPYABLE(AutoBuffer);
private:
u8 *buffer;
size_t size;
public:
AutoBuffer() : buffer(nullptr), size(0) { /* ... */ }
~AutoBuffer() {
this->Reset();
}
AutoBuffer(AutoBuffer &&rhs) {
this->buffer = rhs.buffer;
this->size = rhs.size;
rhs.buffer = nullptr;
rhs.size = 0;
}
AutoBuffer& operator=(AutoBuffer &&rhs) {
rhs.Swap(*this);
return *this;
}
void Swap(AutoBuffer &rhs) {
std::swap(this->buffer, rhs.buffer);
std::swap(this->size, rhs.size);
}
void Reset() {
if (this->buffer != nullptr) {
std::free(this->buffer);
this->buffer = nullptr;
this->size = 0;
}
}
u8 *Get() const {
return this->buffer;
}
size_t GetSize() const {
return this->size;
}
Result Initialize(size_t size) {
/* Check that we're not already initialized. */
AMS_ASSERT(this->buffer == nullptr);
/* Allocate a buffer. */
this->buffer = static_cast<u8 *>(std::malloc(size));
if (this->buffer == nullptr) {
return ResultAllocationFailed();
}
this->size = size;
return ResultSuccess();
}
Result Initialize(const void *buf, size_t size) {
/* Create a new buffer of the right size. */
R_TRY(this->Initialize(size));
/* Copy the input data in. */
std::memcpy(this->buffer, buf, size);
return ResultSuccess();
}
};
}