f362aea42d
The idea is to move all pieces related to the actual libc sources to the "src" directory. This allows downstream users to ship and build just the "src" directory. Reviewed By: michaelrj Differential Revision: https://reviews.llvm.org/D112653
50 lines
2.1 KiB
C++
50 lines
2.1 KiB
C++
//===-- Unittests for Limits ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/__support/CPP/Limits.h"
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#include "utils/UnitTest/Test.h"
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// This just checks against the C spec, almost all implementations will surpass
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// this.
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TEST(LlvmLibcLimitsTest, LimitsFollowSpec) {
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::max(), INT_MAX);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<int>::min(), INT_MIN);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned int>::max(), UINT_MAX);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::max(), LONG_MAX);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long>::min(), LONG_MIN);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long>::max(), ULONG_MAX);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::max(), LLONG_MAX);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<long long>::min(), LLONG_MIN);
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<unsigned long long>::max(),
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ULLONG_MAX);
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}
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// This checks that the current environment supports 128 bit integers.
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TEST(LlvmLibcLimitsTest, Int128Works) {
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__int128_t max128 = ~__uint128_t(0) >> 1;
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__int128_t min128 = (__int128_t(1) << 127);
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EXPECT_GT(__llvm_libc::cpp::NumericLimits<__int128_t>::max(),
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__int128_t(__llvm_libc::cpp::NumericLimits<long long>::max()));
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__int128_t>::max(), max128);
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EXPECT_LT(__llvm_libc::cpp::NumericLimits<__int128_t>::min(),
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__int128_t(__llvm_libc::cpp::NumericLimits<long long>::min()));
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__int128_t>::min(), min128);
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__uint128_t umax128 = ~__uint128_t(0);
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EXPECT_GT(
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__llvm_libc::cpp::NumericLimits<__uint128_t>::max(),
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__uint128_t(__llvm_libc::cpp::NumericLimits<unsigned long long>::max()));
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ASSERT_EQ(__llvm_libc::cpp::NumericLimits<__uint128_t>::max(), umax128);
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}
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