1//===-- Unittests for Limits ----------------------------------------------===//
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/CPP/limits.h"
10#include "src/__support/big_int.h"
11#include "src/__support/macros/properties/types.h" // LIBC_TYPES_HAS_INT128
12#include "test/UnitTest/Test.h"
13
14namespace LIBC_NAMESPACE {
15
16// This just checks against the C spec, almost all implementations will surpass
17// this.
18TEST(LlvmLibcLimitsTest, LimitsFollowSpec) {
19 ASSERT_EQ(cpp::numeric_limits<int>::max(), INT_MAX);
20 ASSERT_EQ(cpp::numeric_limits<int>::min(), INT_MIN);
21
22 ASSERT_EQ(cpp::numeric_limits<unsigned int>::max(), UINT_MAX);
23
24 ASSERT_EQ(cpp::numeric_limits<long>::max(), LONG_MAX);
25 ASSERT_EQ(cpp::numeric_limits<long>::min(), LONG_MIN);
26
27 ASSERT_EQ(cpp::numeric_limits<unsigned long>::max(), ULONG_MAX);
28
29 ASSERT_EQ(cpp::numeric_limits<long long>::max(), LLONG_MAX);
30 ASSERT_EQ(cpp::numeric_limits<long long>::min(), LLONG_MIN);
31
32 ASSERT_EQ(cpp::numeric_limits<unsigned long long>::max(), ULLONG_MAX);
33}
34
35TEST(LlvmLibcLimitsTest, UInt128Limits) {
36 auto umax128 = cpp::numeric_limits<LIBC_NAMESPACE::UInt<128>>::max();
37 auto umax64 = LIBC_NAMESPACE::UInt<128>(cpp::numeric_limits<uint64_t>::max());
38 EXPECT_GT(umax128, umax64);
39 ASSERT_EQ(~LIBC_NAMESPACE::UInt<128>(0), umax128);
40#ifdef LIBC_TYPES_HAS_INT128
41 ASSERT_EQ(~__uint128_t(0), cpp::numeric_limits<__uint128_t>::max());
42#endif // LIBC_TYPES_HAS_INT128
43}
44
45} // namespace LIBC_NAMESPACE
46

source code of libc/test/src/__support/CPP/limits_test.cpp