1//===-- Unittests for endian ----------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/__support/endian_internal.h"
10#include "src/__support/macros/config.h"
11#include "test/UnitTest/Test.h"
12
13namespace LIBC_NAMESPACE_DECL {
14
15struct LlvmLibcEndian : testing::Test {
16 template <typename T> void check(const T original, const T swapped) {
17#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
18 EXPECT_EQ(Endian::to_little_endian(original), original);
19 EXPECT_EQ(Endian::to_big_endian(original), swapped);
20#endif
21#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
22 EXPECT_EQ(Endian::to_big_endian(original), original);
23 EXPECT_EQ(Endian::to_little_endian(original), swapped);
24#endif
25 }
26};
27
28TEST_F(LlvmLibcEndian, Field) {
29 EXPECT_EQ(Endian::IS_LITTLE, __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__);
30 EXPECT_EQ(Endian::IS_BIG, __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__);
31}
32
33TEST_F(LlvmLibcEndian, uint8_t) {
34 const uint8_t original = uint8_t(0x12);
35 check(original, original);
36}
37
38TEST_F(LlvmLibcEndian, uint16_t) {
39 const uint16_t original = uint16_t(0x1234);
40 const uint16_t swapped = __builtin_bswap16(original);
41 check(original, swapped);
42}
43
44TEST_F(LlvmLibcEndian, uint32_t) {
45 const uint32_t original = uint32_t(0x12345678);
46 const uint32_t swapped = __builtin_bswap32(original);
47 check(original, swapped);
48}
49
50TEST_F(LlvmLibcEndian, uint64_t) {
51 const uint64_t original = uint64_t(0x123456789ABCDEF0);
52 const uint64_t swapped = __builtin_bswap64(original);
53 check(original, swapped);
54}
55
56} // namespace LIBC_NAMESPACE_DECL
57

source code of libc/test/src/__support/endian_internal_test.cpp