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/CPP/UInt.h"
11 #include "utils/UnitTest/Test.h"
12 
13 // This just checks against the C spec, almost all implementations will surpass
14 // this.
15 TEST(LlvmLibcLimitsTest, LimitsFollowSpec) {
16   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::max(), INT_MAX);
17   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::min(), INT_MIN);
18 
19   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned int>::max(), UINT_MAX);
20 
21   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::max(), LONG_MAX);
22   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::min(), LONG_MIN);
23 
24   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long>::max(), ULONG_MAX);
25 
26   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::max(), LLONG_MAX);
27   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::min(), LLONG_MIN);
28 
29   ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long long>::max(),
30             ULLONG_MAX);
31 }
32 
33 TEST(LlvmLibcLimitsTest, UInt128Limits) {
34   auto umax128 =
35       __llvm_libc::cpp::NumericLimits<__llvm_libc::cpp::UInt<128>>::max();
36   auto umax64 = __llvm_libc::cpp::UInt<128>(
37       __llvm_libc::cpp::NumericLimits<uint64_t>::max());
38   EXPECT_GT(umax128, umax64);
39   ASSERT_EQ(~__llvm_libc::cpp::UInt<128>(0), umax128);
40 #ifdef __SIZEOF_INT128__
41   ASSERT_EQ(~__uint128_t(0),
42             __llvm_libc::cpp::NumericLimits<__uint128_t>::max());
43 #endif
44 }
45