Abseil Common Libraries (C++) (grcp 依赖)
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45 lines
1.2 KiB
45 lines
1.2 KiB
7 years ago
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// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/base/config.h"
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#include <cstdint>
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#include "gtest/gtest.h"
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namespace {
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TEST(ConfigTest, Endianness) {
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union
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{
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uint32_t value;
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uint8_t data[sizeof(uint32_t)];
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} number;
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number.data[0] = 0x00;
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number.data[1] = 0x01;
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number.data[2] = 0x02;
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number.data[3] = 0x03;
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#if defined(ABSL_IS_LITTLE_ENDIAN) && defined(ABSL_IS_BIG_ENDIAN)
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#error Both ABSL_IS_LITTLE_ENDIAN and ABSL_IS_BIG_ENDIAN are defined
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#elif defined(ABSL_IS_LITTLE_ENDIAN)
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EXPECT_EQ(UINT32_C(0x03020100), number.value);
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#elif defined(ABSL_IS_BIG_ENDIAN)
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EXPECT_EQ(UINT32_C(0x00010203), number.value);
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#else
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#error Unknown endianness
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#endif
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}
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} // namespace
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