| //===-- Unittests for Limits ----------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/__support/CPP/Limits.h" |
| #include "utils/UnitTest/Test.h" |
| |
| // This just checks against the C spec, almost all implementations will surpass |
| // this. |
| TEST(LlvmLibcLimitsTest, LimitsFollowSpec) { |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::max(), INT_MAX); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::min(), INT_MIN); |
| |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned int>::max(), UINT_MAX); |
| |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::max(), LONG_MAX); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::min(), LONG_MIN); |
| |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long>::max(), ULONG_MAX); |
| |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::max(), LLONG_MAX); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::min(), LLONG_MIN); |
| |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long long>::max(), |
| ULLONG_MAX); |
| } |
| |
| // This checks that the current environment supports 128 bit integers. |
| TEST(LlvmLibcLimitsTest, Int128Works) { |
| __int128_t max128 = ~__uint128_t(0) >> 1; |
| __int128_t min128 = (__int128_t(1) << 127); |
| EXPECT_GT(__llvm_libc::cpp::NumericLimits<__int128_t>::max(), |
| __int128_t(__llvm_libc::cpp::NumericLimits<long long>::max())); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__int128_t>::max(), max128); |
| |
| EXPECT_LT(__llvm_libc::cpp::NumericLimits<__int128_t>::min(), |
| __int128_t(__llvm_libc::cpp::NumericLimits<long long>::min())); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__int128_t>::min(), min128); |
| |
| __uint128_t umax128 = ~__uint128_t(0); |
| EXPECT_GT( |
| __llvm_libc::cpp::NumericLimits<__uint128_t>::max(), |
| __uint128_t(__llvm_libc::cpp::NumericLimits<unsigned long long>::max())); |
| ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__uint128_t>::max(), umax128); |
| } |