mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 15:18:59 +00:00
49 lines
1.6 KiB
C++
49 lines
1.6 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/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
#include "htclow_mux_ring_buffer.hpp"
|
|
|
|
namespace ams::htclow::mux {
|
|
|
|
Result RingBuffer::Write(const void *data, size_t size) {
|
|
/* Validate pre-conditions. */
|
|
AMS_ASSERT(!m_is_read_only);
|
|
|
|
/* Check that our buffer can hold the data. */
|
|
R_UNLESS(m_buffer != nullptr, htclow::ResultChannelBufferOverflow());
|
|
R_UNLESS(m_data_size + size <= m_buffer_size, htclow::ResultChannelBufferOverflow());
|
|
|
|
/* Determine position and copy sizes. */
|
|
const size_t pos = (m_data_size + m_offset) % m_buffer_size;
|
|
const size_t left = m_buffer_size - pos;
|
|
const size_t over = size - left;
|
|
|
|
/* Copy. */
|
|
if (left != 0) {
|
|
std::memcpy(static_cast<u8 *>(m_buffer) + pos, data, left);
|
|
}
|
|
if (over != 0) {
|
|
std::memcpy(m_buffer, static_cast<const u8 *>(data) + left, over);
|
|
}
|
|
|
|
/* Update our data size. */
|
|
m_data_size += size;
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
}
|