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106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et: */
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/**
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* \author Marcus Holland-Moritz (github@mhxnet.de)
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* \copyright Copyright (c) Marcus Holland-Moritz
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*
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* This file is part of ricepp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the “Software”), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <array>
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#include <cstdint>
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#include <cstring>
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include <ricepp/byteswap.h>
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namespace {
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alignas(sizeof(uint8_t)) constexpr std::array<uint8_t, sizeof(uint8_t)> const
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kBE8 = {0x12};
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alignas(sizeof(uint8_t)) constexpr std::array<uint8_t, sizeof(uint8_t)> const
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kLE8 = {0x12};
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alignas(sizeof(uint16_t)) constexpr std::array<uint8_t, sizeof(uint16_t)> const
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kBE16 = {0x12, 0x34};
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alignas(sizeof(uint16_t)) constexpr std::array<uint8_t, sizeof(uint16_t)> const
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kLE16 = {0x34, 0x12};
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alignas(sizeof(uint32_t)) constexpr std::array<uint8_t, sizeof(uint32_t)> const
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kBE32 = {0x12, 0x34, 0x56, 0x78};
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alignas(sizeof(uint32_t)) constexpr std::array<uint8_t, sizeof(uint32_t)> const
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kLE32 = {0x78, 0x56, 0x34, 0x12};
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template <std::unsigned_integral ValueType>
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ValueType load_data(std::array<uint8_t, sizeof(ValueType)> const& data) {
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ValueType value;
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std::memcpy(&value, data.data(), sizeof(ValueType));
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return value;
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}
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template <std::unsigned_integral ValueType>
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bool compare_data(std::array<uint8_t, sizeof(ValueType)> const& data,
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ValueType value) {
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ValueType tmp;
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std::memcpy(&tmp, data.data(), sizeof(ValueType));
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return tmp == value;
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}
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} // namespace
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TEST(ricepp, byteswap_test) {
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EXPECT_EQ(0x12, ricepp::byteswap<uint8_t>(0x12, std::endian::big));
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EXPECT_EQ(0x12, ricepp::byteswap<uint8_t>(0x12, std::endian::little));
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auto const be16 = load_data<uint16_t>(kBE16);
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auto const le16 = load_data<uint16_t>(kLE16);
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EXPECT_EQ(0x1234, ricepp::byteswap<uint16_t>(be16, std::endian::big));
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EXPECT_EQ(0x1234, ricepp::byteswap<uint16_t>(le16, std::endian::little));
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}
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TEST(ricepp, byteswap_constexpr_test) {
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static constexpr uint8_t u8val{0x12};
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static constexpr uint16_t u16val{0x1234};
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static constexpr uint32_t u32val{0x12345678};
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static constexpr uint8_t const be8 =
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ricepp::byteswap<std::endian::big>(u8val);
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static constexpr uint16_t const be16 =
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ricepp::byteswap<std::endian::big>(u16val);
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static constexpr uint32_t const be32 =
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ricepp::byteswap<std::endian::big>(u32val);
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EXPECT_TRUE(compare_data(kBE8, be8));
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EXPECT_TRUE(compare_data(kBE16, be16));
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EXPECT_TRUE(compare_data(kBE32, be32));
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static constexpr uint8_t const le8 =
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ricepp::byteswap<std::endian::little>(u8val);
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static constexpr uint16_t const le16 =
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ricepp::byteswap<std::endian::little>(u16val);
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static constexpr uint32_t const le32 =
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ricepp::byteswap<std::endian::little>(u32val);
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EXPECT_TRUE(compare_data(kLE8, le8));
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EXPECT_TRUE(compare_data(kLE16, le16));
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EXPECT_TRUE(compare_data(kLE32, le32));
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}
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