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Atmosphere/libraries/libstratosphere/include/stratosphere/kvdb/kvdb_auto_buffer.hpp
2021-10-10 00:14:06 -07:00

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/*
* Copyright (c) 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 *m_buffer;
size_t m_size;
public:
AutoBuffer() : m_buffer(nullptr), m_size(0) { /* ... */ }
~AutoBuffer() {
this->Reset();
}
AutoBuffer(AutoBuffer &&rhs) {
m_buffer = rhs.m_buffer;
m_size = rhs.m_size;
rhs.m_buffer = nullptr;
rhs.m_size = 0;
}
AutoBuffer &operator=(AutoBuffer &&rhs) {
AutoBuffer(std::move(rhs)).Swap(*this);
return *this;
}
void Swap(AutoBuffer &rhs) {
std::swap(m_buffer, rhs.m_buffer);
std::swap(m_size, rhs.m_size);
}
void Reset() {
if (m_buffer != nullptr) {
delete[] m_buffer;
m_buffer = nullptr;
m_size = 0;
}
}
u8 *Get() const {
return m_buffer;
}
size_t GetSize() const {
return m_size;
}
Result Initialize(size_t size) {
/* Check that we're not already initialized. */
AMS_ABORT_UNLESS(m_buffer == nullptr);
/* Allocate a buffer. */
m_buffer = new (std::nothrow) u8[size];
R_UNLESS(m_buffer != nullptr, kvdb::ResultAllocationFailed());
m_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(m_buffer, buf, size);
return ResultSuccess();
}
};
}