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
14 namespace LIBC_NAMESPACE {
15
16 // This just checks against the C spec, almost all implementations will surpass
17 // this.
TEST(LlvmLibcLimitsTest,LimitsFollowSpec)18 TEST(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
TEST(LlvmLibcLimitsTest,UInt128Limits)35 TEST(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