| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <limits> |
| #include <type_traits> |
| |
| #include "base/compiler_specific.h" |
| |
| // WARNING: This block must come before the base/numerics headers are included. |
| // These tests deliberately cause arithmetic boundary errors. If the compiler is |
| // aggressive enough, it can const detect these errors, so we disable warnings. |
| #if defined(OS_WIN) |
| #pragma warning(disable : 4756) // Arithmetic overflow. |
| #pragma warning(disable : 4293) // Invalid shift. |
| #endif |
| |
| // This may not need to come before the base/numerics headers, but let's keep |
| // it close to the MSVC equivalent. |
| #if defined(__clang__) |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Winteger-overflow" |
| #endif |
| |
| #include "base/logging.h" |
| #include "base/numerics/safe_conversions.h" |
| #include "base/numerics/safe_math.h" |
| #include "base/test/gtest_util.h" |
| #include "build/build_config.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| #if defined(COMPILER_MSVC) && defined(ARCH_CPU_32_BITS) |
| #include <mmintrin.h> |
| #endif |
| |
| namespace base { |
| namespace internal { |
| |
| using std::numeric_limits; |
| |
| // This is a helper function for finding the maximum value in Src that can be |
| // wholy represented as the destination floating-point type. |
| template <typename Dst, typename Src> |
| Dst GetMaxConvertibleToFloat() { |
| using DstLimits = numeric_limits<Dst>; |
| using SrcLimits = numeric_limits<Src>; |
| static_assert(SrcLimits::is_specialized, "Source must be numeric."); |
| static_assert(DstLimits::is_specialized, "Destination must be numeric."); |
| CHECK(DstLimits::is_iec559); |
| |
| if (SrcLimits::digits <= DstLimits::digits && |
| MaxExponent<Src>::value <= MaxExponent<Dst>::value) |
| return SrcLimits::max(); |
| Src max = SrcLimits::max() / 2 + (SrcLimits::is_integer ? 1 : 0); |
| while (max != static_cast<Src>(static_cast<Dst>(max))) { |
| max /= 2; |
| } |
| return static_cast<Dst>(max); |
| } |
| |
| // Test corner case promotions used |
| static_assert(IsIntegerArithmeticSafe<int32_t, int8_t, int8_t>::value, ""); |
| static_assert(IsIntegerArithmeticSafe<int32_t, int16_t, int8_t>::value, ""); |
| static_assert(IsIntegerArithmeticSafe<int32_t, int8_t, int16_t>::value, ""); |
| static_assert(!IsIntegerArithmeticSafe<int32_t, int32_t, int8_t>::value, ""); |
| static_assert(BigEnoughPromotion<int16_t, int8_t>::is_contained, ""); |
| static_assert(BigEnoughPromotion<int32_t, uint32_t>::is_contained, ""); |
| static_assert(BigEnoughPromotion<intmax_t, int8_t>::is_contained, ""); |
| static_assert(!BigEnoughPromotion<uintmax_t, int8_t>::is_contained, ""); |
| static_assert( |
| std::is_same<BigEnoughPromotion<int16_t, int8_t>::type, int16_t>::value, |
| ""); |
| static_assert( |
| std::is_same<BigEnoughPromotion<int32_t, uint32_t>::type, int64_t>::value, |
| ""); |
| static_assert( |
| std::is_same<BigEnoughPromotion<intmax_t, int8_t>::type, intmax_t>::value, |
| ""); |
| static_assert( |
| std::is_same<BigEnoughPromotion<uintmax_t, int8_t>::type, uintmax_t>::value, |
| ""); |
| static_assert(BigEnoughPromotion<int16_t, int8_t>::is_contained, ""); |
| static_assert(BigEnoughPromotion<int32_t, uint32_t>::is_contained, ""); |
| static_assert(BigEnoughPromotion<intmax_t, int8_t>::is_contained, ""); |
| static_assert(!BigEnoughPromotion<uintmax_t, int8_t>::is_contained, ""); |
| static_assert( |
| std::is_same<FastIntegerArithmeticPromotion<int16_t, int8_t>::type, |
| int32_t>::value, |
| ""); |
| static_assert( |
| std::is_same<FastIntegerArithmeticPromotion<int32_t, uint32_t>::type, |
| int64_t>::value, |
| ""); |
| static_assert( |
| std::is_same<FastIntegerArithmeticPromotion<intmax_t, int8_t>::type, |
| intmax_t>::value, |
| ""); |
| static_assert( |
| std::is_same<FastIntegerArithmeticPromotion<uintmax_t, int8_t>::type, |
| uintmax_t>::value, |
| ""); |
| static_assert(FastIntegerArithmeticPromotion<int16_t, int8_t>::is_contained, |
| ""); |
| static_assert(FastIntegerArithmeticPromotion<int32_t, uint32_t>::is_contained, |
| ""); |
| static_assert(!FastIntegerArithmeticPromotion<intmax_t, int8_t>::is_contained, |
| ""); |
| static_assert(!FastIntegerArithmeticPromotion<uintmax_t, int8_t>::is_contained, |
| ""); |
| |
| template <typename U> |
| U GetNumericValueForTest(const CheckedNumeric<U>& src) { |
| return src.state_.value(); |
| } |
| |
| template <typename U> |
| U GetNumericValueForTest(const ClampedNumeric<U>& src) { |
| return static_cast<U>(src); |
| } |
| |
| template <typename U> |
| U GetNumericValueForTest(const U& src) { |
| return src; |
| } |
| |
| // Logs the ValueOrDie() failure instead of crashing. |
| struct LogOnFailure { |
| template <typename T> |
| static T HandleFailure() { |
| LOG(WARNING) << "ValueOrDie() failed unexpectedly."; |
| return T(); |
| } |
| }; |
| |
| template <typename T> |
| constexpr T GetValue(const T& src) { |
| return src; |
| } |
| |
| template <typename T, typename U> |
| constexpr T GetValueAsDest(const U& src) { |
| return static_cast<T>(src); |
| } |
| |
| template <typename T> |
| constexpr T GetValue(const CheckedNumeric<T>& src) { |
| return src.template ValueOrDie<T, LogOnFailure>(); |
| } |
| |
| template <typename T, typename U> |
| constexpr T GetValueAsDest(const CheckedNumeric<U>& src) { |
| return src.template ValueOrDie<T, LogOnFailure>(); |
| } |
| |
| template <typename T> |
| constexpr T GetValue(const ClampedNumeric<T>& src) { |
| return static_cast<T>(src); |
| } |
| |
| template <typename T, typename U> |
| constexpr T GetValueAsDest(const ClampedNumeric<U>& src) { |
| return static_cast<T>(src); |
| } |
| |
| // Helper macros to wrap displaying the conversion types and line numbers. |
| #define TEST_EXPECTED_VALIDITY(expected, actual) \ |
| EXPECT_EQ(expected, (actual).template Cast<Dst>().IsValid()) \ |
| << "Result test: Value " << GetNumericValueForTest(actual) << " as " \ |
| << dst << " on line " << line |
| |
| #define TEST_EXPECTED_SUCCESS(actual) TEST_EXPECTED_VALIDITY(true, actual) |
| #define TEST_EXPECTED_FAILURE(actual) TEST_EXPECTED_VALIDITY(false, actual) |
| |
| // We have to handle promotions, so infer the underlying type below from actual. |
| #define TEST_EXPECTED_VALUE(expected, actual) \ |
| EXPECT_EQ(GetValue(expected), GetValueAsDest<decltype(expected)>(actual)) \ |
| << "Result test: Value " << GetNumericValueForTest(actual) << " as " \ |
| << dst << " on line " << line |
| |
| // Test the simple pointer arithmetic overrides. |
| template <typename Dst> |
| void TestStrictPointerMath() { |
| Dst dummy_value = 0; |
| Dst* dummy_ptr = &dummy_value; |
| static const Dst kDummyOffset = 2; // Don't want to go too far. |
| EXPECT_EQ(dummy_ptr + kDummyOffset, |
| dummy_ptr + StrictNumeric<Dst>(kDummyOffset)); |
| EXPECT_EQ(dummy_ptr - kDummyOffset, |
| dummy_ptr - StrictNumeric<Dst>(kDummyOffset)); |
| EXPECT_NE(dummy_ptr, dummy_ptr + StrictNumeric<Dst>(kDummyOffset)); |
| EXPECT_NE(dummy_ptr, dummy_ptr - StrictNumeric<Dst>(kDummyOffset)); |
| EXPECT_DEATH_IF_SUPPORTED( |
| dummy_ptr + StrictNumeric<size_t>(std::numeric_limits<size_t>::max()), |
| ""); |
| } |
| |
| // Signed integer arithmetic. |
| template <typename Dst> |
| static void TestSpecializedArithmetic( |
| const char* dst, |
| int line, |
| typename std::enable_if<numeric_limits<Dst>::is_integer && |
| numeric_limits<Dst>::is_signed, |
| int>::type = 0) { |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| TEST_EXPECTED_FAILURE(-CheckedNumeric<Dst>(DstLimits::lowest())); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(-1).Abs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeCheckedNum(-DstLimits::max()).Abs()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| -ClampedNumeric<Dst>(DstLimits::lowest())); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(-1).Abs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeClampedNum(-DstLimits::max()).Abs()); |
| |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::max()) + -1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) + |
| DstLimits::lowest()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::max() - 1, |
| ClampedNumeric<Dst>(DstLimits::max()) + -1); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_VALUE( |
| DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) + DstLimits::lowest()); |
| |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) - 1); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()) - -1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) - |
| DstLimits::lowest()); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) - |
| DstLimits::max()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) - 1); |
| TEST_EXPECTED_VALUE(DstLimits::lowest() + 1, |
| ClampedNumeric<Dst>(DstLimits::lowest()) - -1); |
| TEST_EXPECTED_VALUE( |
| DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) - DstLimits::lowest()); |
| TEST_EXPECTED_VALUE( |
| DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) - DstLimits::max()); |
| |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) * 2); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) * 2); |
| |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) / -1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(-1) / 2); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) * -1); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| CheckedNumeric<Dst>(DstLimits::lowest() + 1) * Dst(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| CheckedNumeric<Dst>(-1) * Dst(DstLimits::lowest() + 1)); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| CheckedNumeric<Dst>(DstLimits::lowest()) * Dst(1)); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| CheckedNumeric<Dst>(1) * Dst(DstLimits::lowest())); |
| TEST_EXPECTED_VALUE( |
| typename std::make_unsigned<Dst>::type(0) - DstLimits::lowest(), |
| MakeCheckedNum(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeCheckedNum(DstLimits::max()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(-1).UnsignedAbs()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) / -1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(-1) / 2); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) * -1); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| ClampedNumeric<Dst>(DstLimits::lowest() + 1) * Dst(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| ClampedNumeric<Dst>(-1) * Dst(DstLimits::lowest() + 1)); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) * Dst(1)); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| ClampedNumeric<Dst>(1) * Dst(DstLimits::lowest())); |
| TEST_EXPECTED_VALUE( |
| typename std::make_unsigned<Dst>::type(0) - DstLimits::lowest(), |
| MakeClampedNum(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeClampedNum(DstLimits::max()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(-1).UnsignedAbs()); |
| |
| // Modulus is legal only for integers. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() % 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1); |
| TEST_EXPECTED_VALUE(-1, CheckedNumeric<Dst>(-1) % 2); |
| TEST_EXPECTED_VALUE(-1, CheckedNumeric<Dst>(-1) % -2); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::lowest()) % 2); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(DstLimits::max()) % 2); |
| // Test all the different modulus combinations. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 % CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1); |
| CheckedNumeric<Dst> checked_dst = 1; |
| TEST_EXPECTED_VALUE(0, checked_dst %= 1); |
| // Test that div by 0 is avoided but returns invalid result. |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) % 0); |
| // Test bit shifts. |
| volatile Dst negative_one = -1; |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) << negative_one); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) |
| << (IntegerBitsPlusSign<Dst>::value - 1)); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(0) |
| << IntegerBitsPlusSign<Dst>::value); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) << 1); |
| TEST_EXPECTED_VALUE( |
| static_cast<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 2), |
| CheckedNumeric<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 2)); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0) |
| << (IntegerBitsPlusSign<Dst>::value - 1)); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) << 0); |
| TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) << 1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) >> |
| IntegerBitsPlusSign<Dst>::value); |
| TEST_EXPECTED_VALUE( |
| 0, CheckedNumeric<Dst>(1) >> (IntegerBitsPlusSign<Dst>::value - 1)); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) >> negative_one); |
| |
| // Modulus is legal only for integers. |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>() % 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % 1); |
| TEST_EXPECTED_VALUE(-1, ClampedNumeric<Dst>(-1) % 2); |
| TEST_EXPECTED_VALUE(-1, ClampedNumeric<Dst>(-1) % -2); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(DstLimits::lowest()) % 2); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(DstLimits::max()) % 2); |
| // Test all the different modulus combinations. |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 % ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % 1); |
| ClampedNumeric<Dst> clamped_dst = 1; |
| TEST_EXPECTED_VALUE(0, clamped_dst %= 1); |
| TEST_EXPECTED_VALUE(Dst(1), ClampedNumeric<Dst>(1) % 0); |
| // Test bit shifts. |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(1) |
| << (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE(Dst(0), ClampedNumeric<Dst>(0) |
| << (IntegerBitsPlusSign<Dst>::value + 0U)); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) << 1U); |
| TEST_EXPECTED_VALUE( |
| static_cast<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 2U), |
| ClampedNumeric<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 2U)); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0) |
| << (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) << 0U); |
| TEST_EXPECTED_VALUE(2, ClampedNumeric<Dst>(1) << 1U); |
| TEST_EXPECTED_VALUE( |
| 0, ClampedNumeric<Dst>(1) >> (IntegerBitsPlusSign<Dst>::value + 0U)); |
| TEST_EXPECTED_VALUE( |
| 0, ClampedNumeric<Dst>(1) >> (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE( |
| -1, ClampedNumeric<Dst>(-1) >> (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE(-1, ClampedNumeric<Dst>(DstLimits::lowest()) >> |
| (IntegerBitsPlusSign<Dst>::value - 0U)); |
| |
| TestStrictPointerMath<Dst>(); |
| } |
| |
| // Unsigned integer arithmetic. |
| template <typename Dst> |
| static void TestSpecializedArithmetic( |
| const char* dst, |
| int line, |
| typename std::enable_if<numeric_limits<Dst>::is_integer && |
| !numeric_limits<Dst>::is_signed, |
| int>::type = 0) { |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| TEST_EXPECTED_SUCCESS(-CheckedNumeric<Dst>(DstLimits::lowest())); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) - 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::lowest()) * 2); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) / 2); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_SUCCESS( |
| CheckedNumeric<typename std::make_signed<Dst>::type>( |
| std::numeric_limits<typename std::make_signed<Dst>::type>::lowest()) |
| .UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| MakeCheckedNum(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeCheckedNum(DstLimits::max()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1).UnsignedAbs()); |
| |
| TEST_EXPECTED_VALUE(0, -ClampedNumeric<Dst>(DstLimits::lowest())); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) - 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(DstLimits::lowest()) * 2); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) / 2); |
| TEST_EXPECTED_VALUE(0, |
| ClampedNumeric<Dst>(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE( |
| as_unsigned( |
| std::numeric_limits<typename std::make_signed<Dst>::type>::lowest()), |
| ClampedNumeric<typename std::make_signed<Dst>::type>( |
| std::numeric_limits<typename std::make_signed<Dst>::type>::lowest()) |
| .UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), |
| MakeClampedNum(DstLimits::lowest()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| MakeClampedNum(DstLimits::max()).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0).UnsignedAbs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1).UnsignedAbs()); |
| |
| // Modulus is legal only for integers. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() % 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) % 2); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(DstLimits::lowest()) % 2); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(DstLimits::max()) % 2); |
| // Test all the different modulus combinations. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 % CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) % 1); |
| CheckedNumeric<Dst> checked_dst = 1; |
| TEST_EXPECTED_VALUE(0, checked_dst %= 1); |
| // Test that div by 0 is avoided but returns invalid result. |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) % 0); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) |
| << IntegerBitsPlusSign<Dst>::value); |
| // Test bit shifts. |
| volatile int negative_one = -1; |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) << negative_one); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) |
| << IntegerBitsPlusSign<Dst>::value); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(0) |
| << IntegerBitsPlusSign<Dst>::value); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) << 1); |
| TEST_EXPECTED_VALUE( |
| static_cast<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 1), |
| CheckedNumeric<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 1)); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) << 0); |
| TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) << 1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) >> |
| IntegerBitsPlusSign<Dst>::value); |
| TEST_EXPECTED_VALUE( |
| 0, CheckedNumeric<Dst>(1) >> (IntegerBitsPlusSign<Dst>::value - 1)); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) >> negative_one); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) & 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) & 0); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0) & 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) & 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| MakeCheckedNum(DstLimits::max()) & -1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) | 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) | 0); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(0) | 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0) | 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| CheckedNumeric<Dst>(0) | static_cast<Dst>(-1)); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) ^ 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) ^ 0); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(0) ^ 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(0) ^ 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| CheckedNumeric<Dst>(0) ^ static_cast<Dst>(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::max(), ~CheckedNumeric<Dst>(0)); |
| |
| // Modulus is legal only for integers. |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>() % 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) % 2); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(DstLimits::lowest()) % 2); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(DstLimits::max()) % 2); |
| // Test all the different modulus combinations. |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 % ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) % 1); |
| ClampedNumeric<Dst> clamped_dst = 1; |
| TEST_EXPECTED_VALUE(0, clamped_dst %= 1); |
| // Test that div by 0 is avoided but returns invalid result. |
| TEST_EXPECTED_VALUE(Dst(1), ClampedNumeric<Dst>(1) % 0); |
| // Test bit shifts. |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(1) |
| << as_unsigned(IntegerBitsPlusSign<Dst>::value)); |
| TEST_EXPECTED_VALUE(Dst(0), ClampedNumeric<Dst>(0) << as_unsigned( |
| IntegerBitsPlusSign<Dst>::value)); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) << 1U); |
| TEST_EXPECTED_VALUE( |
| static_cast<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 1U), |
| ClampedNumeric<Dst>(1) << (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) << 0U); |
| TEST_EXPECTED_VALUE(2, ClampedNumeric<Dst>(1) << 1U); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) >> |
| as_unsigned(IntegerBitsPlusSign<Dst>::value)); |
| TEST_EXPECTED_VALUE( |
| 0, ClampedNumeric<Dst>(1) >> (IntegerBitsPlusSign<Dst>::value - 1U)); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) & 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) & 0); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0) & 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) & 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| MakeClampedNum(DstLimits::max()) & -1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) | 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) | 0); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(0) | 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0) | 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| ClampedNumeric<Dst>(0) | static_cast<Dst>(-1)); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) ^ 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) ^ 0); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(0) ^ 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0) ^ 0); |
| TEST_EXPECTED_VALUE(std::numeric_limits<Dst>::max(), |
| ClampedNumeric<Dst>(0) ^ static_cast<Dst>(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::max(), ~ClampedNumeric<Dst>(0)); |
| |
| TestStrictPointerMath<Dst>(); |
| } |
| |
| // Floating point arithmetic. |
| template <typename Dst> |
| void TestSpecializedArithmetic( |
| const char* dst, |
| int line, |
| typename std::enable_if<numeric_limits<Dst>::is_iec559, int>::type = 0) { |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| TEST_EXPECTED_SUCCESS(-CheckedNumeric<Dst>(DstLimits::lowest())); |
| |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(-1).Abs()); |
| |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::max()) + 1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) + |
| DstLimits::lowest()); |
| |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) - |
| DstLimits::lowest()); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) - |
| DstLimits::max()); |
| |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::lowest()) * 2); |
| |
| TEST_EXPECTED_VALUE(-0.5, CheckedNumeric<Dst>(-1.0) / 2); |
| |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| -ClampedNumeric<Dst>(DstLimits::lowest())); |
| |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| ClampedNumeric<Dst>(DstLimits::lowest()).Abs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(-1).Abs()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::lowest() - 1, |
| ClampedNumeric<Dst>(DstLimits::lowest()) + -1); |
| TEST_EXPECTED_VALUE(DstLimits::max() + 1, |
| ClampedNumeric<Dst>(DstLimits::max()) + 1); |
| TEST_EXPECTED_VALUE( |
| DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) + DstLimits::lowest()); |
| |
| TEST_EXPECTED_VALUE( |
| DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) - DstLimits::lowest()); |
| TEST_EXPECTED_VALUE( |
| DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) - DstLimits::max()); |
| |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::lowest()) * 2); |
| |
| TEST_EXPECTED_VALUE(-0.5, ClampedNumeric<Dst>(-1.0) / 2); |
| } |
| |
| // Generic arithmetic tests. |
| template <typename Dst> |
| static void TestArithmetic(const char* dst, int line) { |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| |
| EXPECT_EQ(true, CheckedNumeric<Dst>().IsValid()); |
| EXPECT_EQ(false, CheckedNumeric<Dst>(CheckedNumeric<Dst>(DstLimits::max()) * |
| DstLimits::max()) |
| .IsValid()); |
| EXPECT_EQ(static_cast<Dst>(0), CheckedNumeric<Dst>().ValueOrDie()); |
| EXPECT_EQ(static_cast<Dst>(0), CheckedNumeric<Dst>().ValueOrDefault(1)); |
| EXPECT_EQ(static_cast<Dst>(1), |
| CheckedNumeric<Dst>(CheckedNumeric<Dst>(DstLimits::max()) * |
| DstLimits::max()) |
| .ValueOrDefault(1)); |
| |
| // Test the operator combinations. |
| TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) + CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) - CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) * CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(2, 1 + CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 - CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, 1 * CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, 1 / CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(2, CheckedNumeric<Dst>(1) + 1); |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>(1) - 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) * 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / 1); |
| CheckedNumeric<Dst> checked_dst = 1; |
| TEST_EXPECTED_VALUE(2, checked_dst += 1); |
| checked_dst = 1; |
| TEST_EXPECTED_VALUE(0, checked_dst -= 1); |
| checked_dst = 1; |
| TEST_EXPECTED_VALUE(1, checked_dst *= 1); |
| checked_dst = 1; |
| TEST_EXPECTED_VALUE(1, checked_dst /= 1); |
| |
| TEST_EXPECTED_VALUE(2, ClampedNumeric<Dst>(1) + ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) - ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) * ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) / ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(2, 1 + ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(0, 1 - ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, 1 * ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, 1 / ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(2, ClampedNumeric<Dst>(1) + 1); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(1) - 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) * 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) / 1); |
| ClampedNumeric<Dst> clamped_dst = 1; |
| TEST_EXPECTED_VALUE(2, clamped_dst += 1); |
| clamped_dst = 1; |
| TEST_EXPECTED_VALUE(0, clamped_dst -= 1); |
| clamped_dst = 1; |
| TEST_EXPECTED_VALUE(1, clamped_dst *= 1); |
| clamped_dst = 1; |
| TEST_EXPECTED_VALUE(1, clamped_dst /= 1); |
| |
| // Generic negation. |
| if (DstLimits::is_signed) { |
| TEST_EXPECTED_VALUE(0, -CheckedNumeric<Dst>()); |
| TEST_EXPECTED_VALUE(-1, -CheckedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, -CheckedNumeric<Dst>(-1)); |
| TEST_EXPECTED_VALUE(static_cast<Dst>(DstLimits::max() * -1), |
| -CheckedNumeric<Dst>(DstLimits::max())); |
| |
| TEST_EXPECTED_VALUE(0, -ClampedNumeric<Dst>()); |
| TEST_EXPECTED_VALUE(-1, -ClampedNumeric<Dst>(1)); |
| TEST_EXPECTED_VALUE(1, -ClampedNumeric<Dst>(-1)); |
| TEST_EXPECTED_VALUE(static_cast<Dst>(DstLimits::max() * -1), |
| -ClampedNumeric<Dst>(DstLimits::max())); |
| |
| // The runtime paths for saturated negation differ significantly from what |
| // gets evaluated at compile-time. Making this test volatile forces the |
| // compiler to generate code rather than fold constant expressions. |
| volatile Dst value = Dst(0); |
| TEST_EXPECTED_VALUE(0, -MakeClampedNum(value)); |
| value = Dst(1); |
| TEST_EXPECTED_VALUE(-1, -MakeClampedNum(value)); |
| value = Dst(2); |
| TEST_EXPECTED_VALUE(-2, -MakeClampedNum(value)); |
| value = Dst(-1); |
| TEST_EXPECTED_VALUE(1, -MakeClampedNum(value)); |
| value = Dst(-2); |
| TEST_EXPECTED_VALUE(2, -MakeClampedNum(value)); |
| value = DstLimits::max(); |
| TEST_EXPECTED_VALUE(Dst(DstLimits::max() * -1), -MakeClampedNum(value)); |
| value = Dst(-1 * DstLimits::max()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), -MakeClampedNum(value)); |
| value = DstLimits::lowest(); |
| TEST_EXPECTED_VALUE(DstLimits::max(), -MakeClampedNum(value)); |
| } |
| |
| // Generic absolute value. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>().Abs()); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1).Abs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| CheckedNumeric<Dst>(DstLimits::max()).Abs()); |
| |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>().Abs()); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1).Abs()); |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| ClampedNumeric<Dst>(DstLimits::max()).Abs()); |
| |
| // Generic addition. |
| TEST_EXPECTED_VALUE(1, (CheckedNumeric<Dst>() + 1)); |
| TEST_EXPECTED_VALUE(2, (CheckedNumeric<Dst>(1) + 1)); |
| if (numeric_limits<Dst>::is_signed) |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(-1) + 1)); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::lowest()) + 1); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) + |
| DstLimits::max()); |
| |
| TEST_EXPECTED_VALUE(1, (ClampedNumeric<Dst>() + 1)); |
| TEST_EXPECTED_VALUE(2, (ClampedNumeric<Dst>(1) + 1)); |
| if (numeric_limits<Dst>::is_signed) |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>(-1) + 1)); |
| TEST_EXPECTED_VALUE(DstLimits::lowest() + 1, |
| ClampedNumeric<Dst>(DstLimits::lowest()) + 1); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) + DstLimits::max()); |
| |
| // Generic subtraction. |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(1) - 1)); |
| TEST_EXPECTED_SUCCESS(CheckedNumeric<Dst>(DstLimits::max()) - 1); |
| if (numeric_limits<Dst>::is_signed) { |
| TEST_EXPECTED_VALUE(-1, (CheckedNumeric<Dst>() - 1)); |
| TEST_EXPECTED_VALUE(-2, (CheckedNumeric<Dst>(-1) - 1)); |
| } else { |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) - -1); |
| } |
| |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>(1) - 1)); |
| TEST_EXPECTED_VALUE(DstLimits::max() - 1, |
| ClampedNumeric<Dst>(DstLimits::max()) - 1); |
| if (numeric_limits<Dst>::is_signed) { |
| TEST_EXPECTED_VALUE(-1, (ClampedNumeric<Dst>() - 1)); |
| TEST_EXPECTED_VALUE(-2, (ClampedNumeric<Dst>(-1) - 1)); |
| } else { |
| TEST_EXPECTED_VALUE(DstLimits::max(), |
| ClampedNumeric<Dst>(DstLimits::max()) - -1); |
| } |
| |
| // Generic multiplication. |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>() * 1)); |
| TEST_EXPECTED_VALUE(1, (CheckedNumeric<Dst>(1) * 1)); |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(0) * 0)); |
| if (numeric_limits<Dst>::is_signed) { |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(-1) * 0)); |
| TEST_EXPECTED_VALUE(0, (CheckedNumeric<Dst>(0) * -1)); |
| TEST_EXPECTED_VALUE(-2, (CheckedNumeric<Dst>(-1) * 2)); |
| } else { |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) * -2); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) * |
| CheckedNumeric<uintmax_t>(-2)); |
| } |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(DstLimits::max()) * |
| DstLimits::max()); |
| |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>() * 1)); |
| TEST_EXPECTED_VALUE(1, (ClampedNumeric<Dst>(1) * 1)); |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>(0) * 0)); |
| if (numeric_limits<Dst>::is_signed) { |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>(-1) * 0)); |
| TEST_EXPECTED_VALUE(0, (ClampedNumeric<Dst>(0) * -1)); |
| TEST_EXPECTED_VALUE(-2, (ClampedNumeric<Dst>(-1) * 2)); |
| } else { |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) * -2); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(DstLimits::max()) * |
| ClampedNumeric<uintmax_t>(-2)); |
| } |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| ClampedNumeric<Dst>(DstLimits::max()) * DstLimits::max()); |
| |
| // Generic division. |
| TEST_EXPECTED_VALUE(0, CheckedNumeric<Dst>() / 1); |
| TEST_EXPECTED_VALUE(1, CheckedNumeric<Dst>(1) / 1); |
| TEST_EXPECTED_VALUE(DstLimits::lowest() / 2, |
| CheckedNumeric<Dst>(DstLimits::lowest()) / 2); |
| TEST_EXPECTED_VALUE(DstLimits::max() / 2, |
| CheckedNumeric<Dst>(DstLimits::max()) / 2); |
| TEST_EXPECTED_FAILURE(CheckedNumeric<Dst>(1) / 0); |
| |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>() / 1); |
| TEST_EXPECTED_VALUE(1, ClampedNumeric<Dst>(1) / 1); |
| TEST_EXPECTED_VALUE(DstLimits::lowest() / 2, |
| ClampedNumeric<Dst>(DstLimits::lowest()) / 2); |
| TEST_EXPECTED_VALUE(DstLimits::max() / 2, |
| ClampedNumeric<Dst>(DstLimits::max()) / 2); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), ClampedNumeric<Dst>(1) / 0); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), ClampedNumeric<Dst>(-1) / 0); |
| TEST_EXPECTED_VALUE(0, ClampedNumeric<Dst>(0) / 0); |
| |
| TestSpecializedArithmetic<Dst>(dst, line); |
| } |
| |
| // Helper macro to wrap displaying the conversion types and line numbers. |
| #define TEST_ARITHMETIC(Dst) TestArithmetic<Dst>(#Dst, __LINE__) |
| |
| TEST(SafeNumerics, SignedIntegerMath) { |
| TEST_ARITHMETIC(int8_t); |
| TEST_ARITHMETIC(int16_t); |
| TEST_ARITHMETIC(int); |
| TEST_ARITHMETIC(intptr_t); |
| TEST_ARITHMETIC(intmax_t); |
| } |
| |
| TEST(SafeNumerics, UnsignedIntegerMath) { |
| TEST_ARITHMETIC(uint8_t); |
| TEST_ARITHMETIC(uint16_t); |
| TEST_ARITHMETIC(unsigned int); |
| TEST_ARITHMETIC(uintptr_t); |
| TEST_ARITHMETIC(uintmax_t); |
| } |
| |
| TEST(SafeNumerics, FloatingPointMath) { |
| TEST_ARITHMETIC(float); |
| TEST_ARITHMETIC(double); |
| } |
| |
| // Enumerates the five different conversions types we need to test. |
| enum NumericConversionType { |
| SIGN_PRESERVING_VALUE_PRESERVING, |
| SIGN_PRESERVING_NARROW, |
| SIGN_TO_UNSIGN_WIDEN_OR_EQUAL, |
| SIGN_TO_UNSIGN_NARROW, |
| UNSIGN_TO_SIGN_NARROW_OR_EQUAL, |
| }; |
| |
| // Template covering the different conversion tests. |
| template <typename Dst, typename Src, NumericConversionType conversion> |
| struct TestNumericConversion {}; |
| |
| enum RangeConstraint { |
| RANGE_VALID = 0x0, // Value can be represented by the destination type. |
| RANGE_UNDERFLOW = 0x1, // Value would underflow. |
| RANGE_OVERFLOW = 0x2, // Value would overflow. |
| RANGE_INVALID = RANGE_UNDERFLOW | RANGE_OVERFLOW // Invalid (i.e. NaN). |
| }; |
| |
| // These are some wrappers to make the tests a bit cleaner. |
| constexpr RangeConstraint RangeCheckToEnum(const RangeCheck constraint) { |
| return static_cast<RangeConstraint>( |
| static_cast<int>(constraint.IsOverflowFlagSet()) << 1 | |
| static_cast<int>(constraint.IsUnderflowFlagSet())); |
| } |
| |
| // EXPECT_EQ wrappers providing specific detail on test failures. |
| #define TEST_EXPECTED_RANGE(expected, actual) \ |
| EXPECT_EQ(expected, \ |
| RangeCheckToEnum(DstRangeRelationToSrcRange<Dst>(actual))) \ |
| << "Conversion test: " << src << " value " << actual << " to " << dst \ |
| << " on line " << line |
| |
| template <typename Dst, typename Src> |
| void TestStrictComparison(const char* dst, const char* src, int line) { |
| using DstLimits = numeric_limits<Dst>; |
| using SrcLimits = numeric_limits<Src>; |
| static_assert(StrictNumeric<Src>(SrcLimits::lowest()) < DstLimits::max(), ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::lowest()) < SrcLimits::max(), ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::lowest()) >= DstLimits::max()), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::lowest()) >= SrcLimits::max()), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::lowest()) <= DstLimits::max(), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::lowest()) <= SrcLimits::max(), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::lowest()) > DstLimits::max()), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::lowest()) > SrcLimits::max()), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) > DstLimits::lowest(), ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) > SrcLimits::lowest(), ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::max()) <= DstLimits::lowest()), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::max()) <= SrcLimits::lowest()), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) >= DstLimits::lowest(), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) >= SrcLimits::lowest(), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::max()) < DstLimits::lowest()), |
| ""); |
| static_assert(!(StrictNumeric<Src>(SrcLimits::max()) < SrcLimits::lowest()), |
| ""); |
| static_assert(StrictNumeric<Src>(static_cast<Src>(1)) == static_cast<Dst>(1), |
| ""); |
| static_assert(StrictNumeric<Src>(static_cast<Src>(1)) != static_cast<Dst>(0), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) != static_cast<Dst>(0), |
| ""); |
| static_assert(StrictNumeric<Src>(SrcLimits::max()) != DstLimits::lowest(), |
| ""); |
| static_assert( |
| !(StrictNumeric<Src>(static_cast<Src>(1)) != static_cast<Dst>(1)), ""); |
| static_assert( |
| !(StrictNumeric<Src>(static_cast<Src>(1)) == static_cast<Dst>(0)), ""); |
| |
| // Due to differences in float handling between compilers, these aren't |
| // compile-time constants everywhere. So, we use run-time tests. |
| EXPECT_EQ( |
| SrcLimits::max(), |
| MakeCheckedNum(SrcLimits::max()).Max(DstLimits::lowest()).ValueOrDie()); |
| EXPECT_EQ( |
| DstLimits::max(), |
| MakeCheckedNum(SrcLimits::lowest()).Max(DstLimits::max()).ValueOrDie()); |
| EXPECT_EQ( |
| DstLimits::lowest(), |
| MakeCheckedNum(SrcLimits::max()).Min(DstLimits::lowest()).ValueOrDie()); |
| EXPECT_EQ( |
| SrcLimits::lowest(), |
| MakeCheckedNum(SrcLimits::lowest()).Min(DstLimits::max()).ValueOrDie()); |
| EXPECT_EQ(SrcLimits::lowest(), CheckMin(MakeStrictNum(1), MakeCheckedNum(0), |
| DstLimits::max(), SrcLimits::lowest()) |
| .ValueOrDie()); |
| EXPECT_EQ(DstLimits::max(), CheckMax(MakeStrictNum(1), MakeCheckedNum(0), |
| DstLimits::max(), SrcLimits::lowest()) |
| .ValueOrDie()); |
| |
| EXPECT_EQ(SrcLimits::max(), |
| MakeClampedNum(SrcLimits::max()).Max(DstLimits::lowest())); |
| EXPECT_EQ(DstLimits::max(), |
| MakeClampedNum(SrcLimits::lowest()).Max(DstLimits::max())); |
| EXPECT_EQ(DstLimits::lowest(), |
| MakeClampedNum(SrcLimits::max()).Min(DstLimits::lowest())); |
| EXPECT_EQ(SrcLimits::lowest(), |
| MakeClampedNum(SrcLimits::lowest()).Min(DstLimits::max())); |
| EXPECT_EQ(SrcLimits::lowest(), |
| ClampMin(MakeStrictNum(1), MakeClampedNum(0), DstLimits::max(), |
| SrcLimits::lowest())); |
| EXPECT_EQ(DstLimits::max(), ClampMax(MakeStrictNum(1), MakeClampedNum(0), |
| DstLimits::max(), SrcLimits::lowest())); |
| |
| if (IsValueInRangeForNumericType<Dst>(SrcLimits::max())) { |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::max()), (CommonMax<Dst, Src>())); |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::max()), |
| (CommonMaxOrMin<Dst, Src>(false))); |
| } else { |
| TEST_EXPECTED_VALUE(DstLimits::max(), (CommonMax<Dst, Src>())); |
| TEST_EXPECTED_VALUE(DstLimits::max(), (CommonMaxOrMin<Dst, Src>(false))); |
| } |
| |
| if (IsValueInRangeForNumericType<Dst>(SrcLimits::lowest())) { |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::lowest()), (CommonMin<Dst, Src>())); |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::lowest()), |
| (CommonMaxOrMin<Dst, Src>(true))); |
| } else { |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), (CommonMin<Dst, Src>())); |
| TEST_EXPECTED_VALUE(DstLimits::lowest(), (CommonMaxOrMin<Dst, Src>(true))); |
| } |
| } |
| |
| template <typename Dst, typename Src> |
| struct TestNumericConversion<Dst, Src, SIGN_PRESERVING_VALUE_PRESERVING> { |
| static void Test(const char* dst, const char* src, int line) { |
| using SrcLimits = SaturationDefaultLimits<Src>; |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| // Integral to floating. |
| static_assert((DstLimits::is_iec559 && SrcLimits::is_integer) || |
| // Not floating to integral and... |
| (!(DstLimits::is_integer && SrcLimits::is_iec559) && |
| // Same sign, same numeric, source is narrower or same. |
| ((SrcLimits::is_signed == DstLimits::is_signed && |
| MaxExponent<Dst>::value >= MaxExponent<Src>::value) || |
| // Or signed destination and source is smaller |
| (DstLimits::is_signed && |
| MaxExponent<Dst>::value >= MaxExponent<Src>::value))), |
| "Comparison must be sign preserving and value preserving"); |
| |
| TestStrictComparison<Dst, Src>(dst, src, line); |
| |
| const CheckedNumeric<Dst> checked_dst = SrcLimits::max(); |
| const ClampedNumeric<Dst> clamped_dst = SrcLimits::max(); |
| TEST_EXPECTED_SUCCESS(checked_dst); |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::max()), clamped_dst); |
| if (MaxExponent<Dst>::value > MaxExponent<Src>::value) { |
| if (MaxExponent<Dst>::value >= MaxExponent<Src>::value * 2 - 1) { |
| // At least twice larger type. |
| TEST_EXPECTED_SUCCESS(SrcLimits::max() * checked_dst); |
| TEST_EXPECTED_VALUE(SrcLimits::max() * clamped_dst, |
| Dst(SrcLimits::max()) * SrcLimits::max()); |
| } else { // Larger, but not at least twice as large. |
| TEST_EXPECTED_FAILURE(SrcLimits::max() * checked_dst); |
| TEST_EXPECTED_SUCCESS(checked_dst + 1); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), |
| SrcLimits::max() * clamped_dst); |
| TEST_EXPECTED_VALUE(Dst(SrcLimits::max()) + Dst(1), |
| clamped_dst + Dst(1)); |
| } |
| } else { // Same width type. |
| TEST_EXPECTED_FAILURE(checked_dst + 1); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst + Dst(1)); |
| } |
| |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1)); |
| if (SrcLimits::is_iec559) { |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max() * static_cast<Src>(-1)); |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity()); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1); |
| TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN()); |
| } else if (numeric_limits<Src>::is_signed) { |
| // This block reverses the Src to Dst relationship so we don't have to |
| // complicate the test macros. |
| if (!std::is_same<Src, Dst>::value) { |
| TEST_EXPECTED_SUCCESS(CheckDiv(SrcLimits::lowest(), Dst(-1))); |
| } |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1)); |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::lowest()); |
| } |
| } |
| }; |
| |
| template <typename Dst, typename Src> |
| struct TestNumericConversion<Dst, Src, SIGN_PRESERVING_NARROW> { |
| static void Test(const char* dst, const char* src, int line) { |
| using SrcLimits = SaturationDefaultLimits<Src>; |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| static_assert(SrcLimits::is_signed == DstLimits::is_signed, |
| "Destination and source sign must be the same"); |
| static_assert(MaxExponent<Dst>::value <= MaxExponent<Src>::value, |
| "Destination must be narrower than source"); |
| |
| TestStrictComparison<Dst, Src>(dst, src, line); |
| |
| const CheckedNumeric<Dst> checked_dst; |
| TEST_EXPECTED_FAILURE(checked_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(1, checked_dst + Src(1)); |
| TEST_EXPECTED_FAILURE(checked_dst - SrcLimits::max()); |
| |
| ClampedNumeric<Dst> clamped_dst; |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(1, clamped_dst + Src(1)); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), clamped_dst - SrcLimits::max()); |
| clamped_dst += SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst); |
| clamped_dst = DstLimits::max(); |
| clamped_dst += SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst); |
| clamped_dst = DstLimits::max(); |
| clamped_dst -= SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), clamped_dst); |
| clamped_dst = 0; |
| |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1)); |
| if (SrcLimits::is_iec559) { |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::max() * -1); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1)); |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity()); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1); |
| TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN()); |
| if (DstLimits::is_integer) { |
| if (SrcLimits::digits < DstLimits::digits) { |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, |
| static_cast<Src>(DstLimits::max())); |
| } else { |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(DstLimits::max())); |
| } |
| TEST_EXPECTED_RANGE( |
| RANGE_VALID, |
| static_cast<Src>(GetMaxConvertibleToFloat<Src, Dst>())); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(DstLimits::lowest())); |
| } |
| } else if (SrcLimits::is_signed) { |
| TEST_EXPECTED_VALUE(-1, checked_dst - static_cast<Src>(1)); |
| TEST_EXPECTED_VALUE(-1, clamped_dst - static_cast<Src>(1)); |
| TEST_EXPECTED_VALUE(Src(Src(0) - DstLimits::lowest()), |
| ClampDiv(DstLimits::lowest(), Src(-1))); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::lowest()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(-1)); |
| } else { |
| TEST_EXPECTED_FAILURE(checked_dst - static_cast<Src>(1)); |
| TEST_EXPECTED_VALUE(Dst(0), clamped_dst - static_cast<Src>(1)); |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::lowest()); |
| } |
| } |
| }; |
| |
| template <typename Dst, typename Src> |
| struct TestNumericConversion<Dst, Src, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL> { |
| static void Test(const char* dst, const char* src, int line) { |
| using SrcLimits = SaturationDefaultLimits<Src>; |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| static_assert(MaxExponent<Dst>::value >= MaxExponent<Src>::value, |
| "Destination must be equal or wider than source."); |
| static_assert(SrcLimits::is_signed, "Source must be signed"); |
| static_assert(!DstLimits::is_signed, "Destination must be unsigned"); |
| |
| TestStrictComparison<Dst, Src>(dst, src, line); |
| |
| const CheckedNumeric<Dst> checked_dst; |
| TEST_EXPECTED_VALUE(SrcLimits::max(), checked_dst + SrcLimits::max()); |
| TEST_EXPECTED_FAILURE(checked_dst + static_cast<Src>(-1)); |
| TEST_EXPECTED_SUCCESS(checked_dst * static_cast<Src>(-1)); |
| TEST_EXPECTED_FAILURE(checked_dst + SrcLimits::lowest()); |
| TEST_EXPECTED_VALUE(Dst(0), CheckDiv(Dst(0), Src(-1))); |
| |
| const ClampedNumeric<Dst> clamped_dst; |
| TEST_EXPECTED_VALUE(SrcLimits::max(), clamped_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| clamped_dst + static_cast<Src>(-1)); |
| TEST_EXPECTED_VALUE(0, clamped_dst * static_cast<Src>(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| clamped_dst + SrcLimits::lowest()); |
| |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::lowest()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::max()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1)); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, static_cast<Src>(-1)); |
| } |
| }; |
| |
| template <typename Dst, typename Src> |
| struct TestNumericConversion<Dst, Src, SIGN_TO_UNSIGN_NARROW> { |
| static void Test(const char* dst, const char* src, int line) { |
| using SrcLimits = SaturationDefaultLimits<Src>; |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| static_assert(MaxExponent<Dst>::value < MaxExponent<Src>::value, |
| "Destination must be narrower than source."); |
| static_assert(SrcLimits::is_signed, "Source must be signed."); |
| static_assert(!DstLimits::is_signed, "Destination must be unsigned."); |
| |
| TestStrictComparison<Dst, Src>(dst, src, line); |
| |
| const CheckedNumeric<Dst> checked_dst; |
| TEST_EXPECTED_VALUE(1, checked_dst + static_cast<Src>(1)); |
| TEST_EXPECTED_FAILURE(checked_dst + SrcLimits::max()); |
| TEST_EXPECTED_FAILURE(checked_dst + static_cast<Src>(-1)); |
| TEST_EXPECTED_FAILURE(checked_dst + SrcLimits::lowest()); |
| |
| ClampedNumeric<Dst> clamped_dst; |
| TEST_EXPECTED_VALUE(1, clamped_dst + static_cast<Src>(1)); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| clamped_dst + static_cast<Src>(-1)); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), |
| clamped_dst + SrcLimits::lowest()); |
| clamped_dst += SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst); |
| clamped_dst = DstLimits::max(); |
| clamped_dst += SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst); |
| clamped_dst = DstLimits::max(); |
| clamped_dst -= SrcLimits::max(); |
| TEST_EXPECTED_VALUE(DstLimits::Underflow(), clamped_dst); |
| clamped_dst = 0; |
| |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1)); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, static_cast<Src>(-1)); |
| |
| // Additional saturation tests. |
| EXPECT_EQ(DstLimits::max(), saturated_cast<Dst>(SrcLimits::max())); |
| EXPECT_EQ(DstLimits::lowest(), saturated_cast<Dst>(SrcLimits::lowest())); |
| |
| if (SrcLimits::is_iec559) { |
| EXPECT_EQ(Dst(0), saturated_cast<Dst>(SrcLimits::quiet_NaN())); |
| |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::max() * -1); |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::infinity()); |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::infinity() * -1); |
| TEST_EXPECTED_RANGE(RANGE_INVALID, SrcLimits::quiet_NaN()); |
| if (DstLimits::is_integer) { |
| if (SrcLimits::digits < DstLimits::digits) { |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, |
| static_cast<Src>(DstLimits::max())); |
| } else { |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(DstLimits::max())); |
| } |
| TEST_EXPECTED_RANGE( |
| RANGE_VALID, |
| static_cast<Src>(GetMaxConvertibleToFloat<Src, Dst>())); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(DstLimits::lowest())); |
| } |
| } else { |
| TEST_EXPECTED_RANGE(RANGE_UNDERFLOW, SrcLimits::lowest()); |
| } |
| } |
| }; |
| |
| template <typename Dst, typename Src> |
| struct TestNumericConversion<Dst, Src, UNSIGN_TO_SIGN_NARROW_OR_EQUAL> { |
| static void Test(const char* dst, const char* src, int line) { |
| using SrcLimits = SaturationDefaultLimits<Src>; |
| using DstLimits = SaturationDefaultLimits<Dst>; |
| static_assert(MaxExponent<Dst>::value <= MaxExponent<Src>::value, |
| "Destination must be narrower or equal to source."); |
| static_assert(!SrcLimits::is_signed, "Source must be unsigned."); |
| static_assert(DstLimits::is_signed, "Destination must be signed."); |
| |
| TestStrictComparison<Dst, Src>(dst, src, line); |
| |
| const CheckedNumeric<Dst> checked_dst; |
| TEST_EXPECTED_VALUE(1, checked_dst + static_cast<Src>(1)); |
| TEST_EXPECTED_FAILURE(checked_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(SrcLimits::lowest(), checked_dst + SrcLimits::lowest()); |
| |
| const ClampedNumeric<Dst> clamped_dst; |
| TEST_EXPECTED_VALUE(1, clamped_dst + static_cast<Src>(1)); |
| TEST_EXPECTED_VALUE(DstLimits::Overflow(), clamped_dst + SrcLimits::max()); |
| TEST_EXPECTED_VALUE(SrcLimits::lowest(), clamped_dst + SrcLimits::lowest()); |
| |
| TEST_EXPECTED_RANGE(RANGE_VALID, SrcLimits::lowest()); |
| TEST_EXPECTED_RANGE(RANGE_OVERFLOW, SrcLimits::max()); |
| TEST_EXPECTED_RANGE(RANGE_VALID, static_cast<Src>(1)); |
| |
| // Additional saturation tests. |
| EXPECT_EQ(DstLimits::max(), saturated_cast<Dst>(SrcLimits::max())); |
| EXPECT_EQ(Dst(0), saturated_cast<Dst>(SrcLimits::lowest())); |
| } |
| }; |
| |
| // Helper macro to wrap displaying the conversion types and line numbers |
| #define TEST_NUMERIC_CONVERSION(d, s, t) \ |
| TestNumericConversion<d, s, t>::Test(#d, #s, __LINE__) |
| |
| TEST(SafeNumerics, IntMinOperations) { |
| TEST_NUMERIC_CONVERSION(int8_t, int8_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(uint8_t, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| |
| TEST_NUMERIC_CONVERSION(int8_t, int16_t, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(int8_t, int, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(uint8_t, uint16_t, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(uint8_t, unsigned int, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(int8_t, float, SIGN_PRESERVING_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(uint8_t, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| |
| TEST_NUMERIC_CONVERSION(uint8_t, int16_t, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uint8_t, int, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uint8_t, intmax_t, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uint8_t, float, SIGN_TO_UNSIGN_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(int8_t, uint16_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(int8_t, unsigned int, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(int8_t, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| } |
| |
| TEST(SafeNumerics, Int16Operations) { |
| TEST_NUMERIC_CONVERSION(int16_t, int16_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(uint16_t, uint16_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| |
| TEST_NUMERIC_CONVERSION(int16_t, int, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(uint16_t, unsigned int, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(int16_t, float, SIGN_PRESERVING_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(uint16_t, int16_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| |
| TEST_NUMERIC_CONVERSION(uint16_t, int, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uint16_t, intmax_t, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uint16_t, float, SIGN_TO_UNSIGN_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(int16_t, unsigned int, |
| UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(int16_t, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| } |
| |
| TEST(SafeNumerics, IntOperations) { |
| TEST_NUMERIC_CONVERSION(int, int, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(unsigned int, unsigned int, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(int, int8_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(unsigned int, uint8_t, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(int, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| |
| TEST_NUMERIC_CONVERSION(int, intmax_t, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(unsigned int, uintmax_t, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(int, float, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(int, double, SIGN_PRESERVING_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(unsigned int, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(unsigned int, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| |
| TEST_NUMERIC_CONVERSION(unsigned int, intmax_t, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(unsigned int, float, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(unsigned int, double, SIGN_TO_UNSIGN_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(int, unsigned int, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(int, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| } |
| |
| TEST(SafeNumerics, IntMaxOperations) { |
| TEST_NUMERIC_CONVERSION(intmax_t, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(uintmax_t, uintmax_t, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(intmax_t, int, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(uintmax_t, unsigned int, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(intmax_t, unsigned int, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(intmax_t, uint8_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| |
| TEST_NUMERIC_CONVERSION(intmax_t, float, SIGN_PRESERVING_NARROW); |
| TEST_NUMERIC_CONVERSION(intmax_t, double, SIGN_PRESERVING_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(uintmax_t, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(uintmax_t, int8_t, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| |
| TEST_NUMERIC_CONVERSION(uintmax_t, float, SIGN_TO_UNSIGN_NARROW); |
| TEST_NUMERIC_CONVERSION(uintmax_t, double, SIGN_TO_UNSIGN_NARROW); |
| |
| TEST_NUMERIC_CONVERSION(intmax_t, uintmax_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| } |
| |
| TEST(SafeNumerics, FloatOperations) { |
| TEST_NUMERIC_CONVERSION(float, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(float, uintmax_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(float, int, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(float, unsigned int, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| |
| TEST_NUMERIC_CONVERSION(float, double, SIGN_PRESERVING_NARROW); |
| } |
| |
| TEST(SafeNumerics, DoubleOperations) { |
| TEST_NUMERIC_CONVERSION(double, intmax_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(double, uintmax_t, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(double, int, SIGN_PRESERVING_VALUE_PRESERVING); |
| TEST_NUMERIC_CONVERSION(double, unsigned int, |
| SIGN_PRESERVING_VALUE_PRESERVING); |
| } |
| |
| TEST(SafeNumerics, SizeTOperations) { |
| TEST_NUMERIC_CONVERSION(size_t, int, SIGN_TO_UNSIGN_WIDEN_OR_EQUAL); |
| TEST_NUMERIC_CONVERSION(int, size_t, UNSIGN_TO_SIGN_NARROW_OR_EQUAL); |
| } |
| |
| // A one-off test to ensure StrictNumeric won't resolve to an incorrect type. |
| // If this fails we'll just get a compiler error on an ambiguous overload. |
| int TestOverload(int) { // Overload fails. |
| return 0; |
| } |
| uint8_t TestOverload(uint8_t) { // Overload fails. |
| return 0; |
| } |
| size_t TestOverload(size_t) { // Overload succeeds. |
| return 0; |
| } |
| |
| static_assert( |
| std::is_same<decltype(TestOverload(StrictNumeric<int>())), int>::value, |
| ""); |
| static_assert(std::is_same<decltype(TestOverload(StrictNumeric<size_t>())), |
| size_t>::value, |
| ""); |
| |
| template <typename T> |
| struct CastTest1 { |
| static constexpr T NaN() { return -1; } |
| static constexpr T max() { return numeric_limits<T>::max() - 1; } |
| static constexpr T Overflow() { return max(); } |
| static constexpr T lowest() { return numeric_limits<T>::lowest() + 1; } |
| static constexpr T Underflow() { return lowest(); } |
| }; |
| |
| template <typename T> |
| struct CastTest2 { |
| static constexpr T NaN() { return 11; } |
| static constexpr T max() { return 10; } |
| static constexpr T Overflow() { return max(); } |
| static constexpr T lowest() { return 1; } |
| static constexpr T Underflow() { return lowest(); } |
| }; |
| |
| TEST(SafeNumerics, CastTests) { |
| // MSVC catches and warns that we're forcing saturation in these tests. |
| // Since that's intentional, we need to shut this warning off. |
| #if defined(COMPILER_MSVC) |
| #pragma warning(disable : 4756) |
| #endif |
| |
| int small_positive = 1; |
| int small_negative = -1; |
| double double_small = 1.0; |
| double double_large = numeric_limits<double>::max(); |
| double double_infinity = numeric_limits<float>::infinity(); |
| double double_large_int = numeric_limits<int>::max(); |
| double double_small_int = numeric_limits<int>::lowest(); |
| |
| // Just test that the casts compile, since the other tests cover logic. |
| EXPECT_EQ(0, checked_cast<int>(static_cast<size_t>(0))); |
| EXPECT_EQ(0, strict_cast<int>(static_cast<char>(0))); |
| EXPECT_EQ(0, strict_cast<int>(static_cast<unsigned char>(0))); |
| EXPECT_EQ(0U, strict_cast<unsigned>(static_cast<unsigned char>(0))); |
| EXPECT_EQ(1ULL, static_cast<uint64_t>(StrictNumeric<size_t>(1U))); |
| EXPECT_EQ(1ULL, static_cast<uint64_t>(SizeT(1U))); |
| EXPECT_EQ(1U, static_cast<size_t>(StrictNumeric<unsigned>(1U))); |
| |
| EXPECT_TRUE(CheckedNumeric<uint64_t>(StrictNumeric<unsigned>(1U)).IsValid()); |
| EXPECT_TRUE(CheckedNumeric<int>(StrictNumeric<unsigned>(1U)).IsValid()); |
| EXPECT_FALSE(CheckedNumeric<unsigned>(StrictNumeric<int>(-1)).IsValid()); |
| |
| EXPECT_TRUE(IsValueNegative(-1)); |
| EXPECT_TRUE(IsValueNegative(numeric_limits<int>::lowest())); |
| EXPECT_FALSE(IsValueNegative(numeric_limits<unsigned>::lowest())); |
| EXPECT_TRUE(IsValueNegative(numeric_limits<double>::lowest())); |
| EXPECT_FALSE(IsValueNegative(0)); |
| EXPECT_FALSE(IsValueNegative(1)); |
| EXPECT_FALSE(IsValueNegative(0u)); |
| EXPECT_FALSE(IsValueNegative(1u)); |
| EXPECT_FALSE(IsValueNegative(numeric_limits<int>::max())); |
| EXPECT_FALSE(IsValueNegative(numeric_limits<unsigned>::max())); |
| EXPECT_FALSE(IsValueNegative(numeric_limits<double>::max())); |
| |
| // These casts and coercions will fail to compile: |
| // EXPECT_EQ(0, strict_cast<int>(static_cast<size_t>(0))); |
| // EXPECT_EQ(0, strict_cast<size_t>(static_cast<int>(0))); |
| // EXPECT_EQ(1ULL, StrictNumeric<size_t>(1)); |
| // EXPECT_EQ(1, StrictNumeric<size_t>(1U)); |
| |
| // Test various saturation corner cases. |
| EXPECT_EQ(saturated_cast<int>(small_negative), |
| static_cast<int>(small_negative)); |
| EXPECT_EQ(saturated_cast<int>(small_positive), |
| static_cast<int>(small_positive)); |
| EXPECT_EQ(saturated_cast<unsigned>(small_negative), static_cast<unsigned>(0)); |
| EXPECT_EQ(saturated_cast<int>(double_small), static_cast<int>(double_small)); |
| EXPECT_EQ(saturated_cast<int>(double_large), numeric_limits<int>::max()); |
| EXPECT_EQ(saturated_cast<float>(double_large), double_infinity); |
| EXPECT_EQ(saturated_cast<float>(-double_large), -double_infinity); |
| EXPECT_EQ(numeric_limits<int>::lowest(), |
| saturated_cast<int>(double_small_int)); |
| EXPECT_EQ(numeric_limits<int>::max(), saturated_cast<int>(double_large_int)); |
| |
| // Test the saturated cast overrides. |
| using FloatLimits = numeric_limits<float>; |
| using IntLimits = numeric_limits<int>; |
| EXPECT_EQ(-1, (saturated_cast<int, CastTest1>(FloatLimits::quiet_NaN()))); |
| EXPECT_EQ(CastTest1<int>::max(), |
| (saturated_cast<int, CastTest1>(FloatLimits::infinity()))); |
| EXPECT_EQ(CastTest1<int>::max(), |
| (saturated_cast<int, CastTest1>(FloatLimits::max()))); |
| EXPECT_EQ(CastTest1<int>::max(), |
| (saturated_cast<int, CastTest1>(float(IntLimits::max())))); |
| EXPECT_EQ(CastTest1<int>::lowest(), |
| (saturated_cast<int, CastTest1>(-FloatLimits::infinity()))); |
| EXPECT_EQ(CastTest1<int>::lowest(), |
| (saturated_cast<int, CastTest1>(FloatLimits::lowest()))); |
| EXPECT_EQ(0, (saturated_cast<int, CastTest1>(0.0))); |
| EXPECT_EQ(1, (saturated_cast<int, CastTest1>(1.0))); |
| EXPECT_EQ(-1, (saturated_cast<int, CastTest1>(-1.0))); |
| EXPECT_EQ(0, (saturated_cast<int, CastTest1>(0))); |
| EXPECT_EQ(1, (saturated_cast<int, CastTest1>(1))); |
| EXPECT_EQ(-1, (saturated_cast<int, CastTest1>(-1))); |
| EXPECT_EQ(CastTest1<int>::lowest(), |
| (saturated_cast<int, CastTest1>(float(IntLimits::lowest())))); |
| EXPECT_EQ(11, (saturated_cast<int, CastTest2>(FloatLimits::quiet_NaN()))); |
| EXPECT_EQ(10, (saturated_cast<int, CastTest2>(FloatLimits::infinity()))); |
| EXPECT_EQ(10, (saturated_cast<int, CastTest2>(FloatLimits::max()))); |
| EXPECT_EQ(1, (saturated_cast<int, CastTest2>(-FloatLimits::infinity()))); |
| EXPECT_EQ(1, (saturated_cast<int, CastTest2>(FloatLimits::lowest()))); |
| EXPECT_EQ(1, (saturated_cast<int, CastTest2>(0U))); |
| |
| float not_a_number = std::numeric_limits<float>::infinity() - |
| std::numeric_limits<float>::infinity(); |
| EXPECT_TRUE(std::isnan(not_a_number)); |
| EXPECT_EQ(0, saturated_cast<int>(not_a_number)); |
| |
| // Test the CheckedNumeric value extractions functions. |
| auto int8_min = MakeCheckedNum(numeric_limits<int8_t>::lowest()); |
| auto int8_max = MakeCheckedNum(numeric_limits<int8_t>::max()); |
| auto double_max = MakeCheckedNum(numeric_limits<double>::max()); |
| static_assert( |
| std::is_same<int16_t, |
| decltype(int8_min.ValueOrDie<int16_t>())::type>::value, |
| "ValueOrDie returning incorrect type."); |
| static_assert( |
| std::is_same<int16_t, |
| decltype(int8_min.ValueOrDefault<int16_t>(0))::type>::value, |
| "ValueOrDefault returning incorrect type."); |
| EXPECT_FALSE(IsValidForType<uint8_t>(int8_min)); |
| EXPECT_TRUE(IsValidForType<uint8_t>(int8_max)); |
| EXPECT_EQ(static_cast<int>(numeric_limits<int8_t>::lowest()), |
| ValueOrDieForType<int>(int8_min)); |
| EXPECT_TRUE(IsValidForType<uint32_t>(int8_max)); |
| EXPECT_EQ(static_cast<int>(numeric_limits<int8_t>::max()), |
| ValueOrDieForType<int>(int8_max)); |
| EXPECT_EQ(0, ValueOrDefaultForType<int>(double_max, 0)); |
| uint8_t uint8_dest = 0; |
| int16_t int16_dest = 0; |
| double double_dest = 0; |
| EXPECT_TRUE(int8_max.AssignIfValid(&uint8_dest)); |
| EXPECT_EQ(static_cast<uint8_t>(numeric_limits<int8_t>::max()), uint8_dest); |
| EXPECT_FALSE(int8_min.AssignIfValid(&uint8_dest)); |
| EXPECT_TRUE(int8_max.AssignIfValid(&int16_dest)); |
| EXPECT_EQ(static_cast<int16_t>(numeric_limits<int8_t>::max()), int16_dest); |
| EXPECT_TRUE(int8_min.AssignIfValid(&int16_dest)); |
| EXPECT_EQ(static_cast<int16_t>(numeric_limits<int8_t>::lowest()), int16_dest); |
| EXPECT_FALSE(double_max.AssignIfValid(&uint8_dest)); |
| EXPECT_FALSE(double_max.AssignIfValid(&int16_dest)); |
| EXPECT_TRUE(double_max.AssignIfValid(&double_dest)); |
| EXPECT_EQ(numeric_limits<double>::max(), double_dest); |
| EXPECT_EQ(1, checked_cast<int>(StrictNumeric<int>(1))); |
| EXPECT_EQ(1, saturated_cast<int>(StrictNumeric<int>(1))); |
| EXPECT_EQ(1, strict_cast<int>(StrictNumeric<int>(1))); |
| |
| enum class EnumTest { kOne = 1 }; |
| EXPECT_EQ(1, checked_cast<int>(EnumTest::kOne)); |
| EXPECT_EQ(1, saturated_cast<int>(EnumTest::kOne)); |
| EXPECT_EQ(1, strict_cast<int>(EnumTest::kOne)); |
| } |
| |
| TEST(SafeNumerics, IsValueInRangeForNumericType) { |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(0)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(2)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>(-1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(0xffffffffu)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint32_t>(UINT64_C(0xffffffff))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>(UINT64_C(0x100000000))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>(UINT64_C(0x100000001))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>( |
| std::numeric_limits<int32_t>::lowest())); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint32_t>( |
| std::numeric_limits<int64_t>::lowest())); |
| |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(0)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(2)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(-1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(0x7fffffff)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>(0x7fffffffu)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>(0x80000000u)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>(0xffffffffu)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>(INT64_C(0x80000000))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>(INT64_C(0xffffffff))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>(INT64_C(0x100000000))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>( |
| std::numeric_limits<int32_t>::lowest())); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int32_t>( |
| static_cast<int64_t>(std::numeric_limits<int32_t>::lowest()))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>( |
| static_cast<int64_t>(std::numeric_limits<int32_t>::lowest()) - 1)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<int32_t>( |
| std::numeric_limits<int64_t>::lowest())); |
| |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(0)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(2)); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint64_t>(-1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(0xffffffffu)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(UINT64_C(0xffffffff))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(UINT64_C(0x100000000))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<uint64_t>(UINT64_C(0x100000001))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint64_t>( |
| std::numeric_limits<int32_t>::lowest())); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint64_t>(INT64_C(-1))); |
| EXPECT_FALSE(IsValueInRangeForNumericType<uint64_t>( |
| std::numeric_limits<int64_t>::lowest())); |
| |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(0)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(2)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(-1)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(0x7fffffff)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(0x7fffffffu)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(0x80000000u)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(0xffffffffu)); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(INT64_C(0x80000000))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(INT64_C(0xffffffff))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>(INT64_C(0x100000000))); |
| EXPECT_TRUE( |
| IsValueInRangeForNumericType<int64_t>(INT64_C(0x7fffffffffffffff))); |
| EXPECT_TRUE( |
| IsValueInRangeForNumericType<int64_t>(UINT64_C(0x7fffffffffffffff))); |
| EXPECT_FALSE( |
| IsValueInRangeForNumericType<int64_t>(UINT64_C(0x8000000000000000))); |
| EXPECT_FALSE( |
| IsValueInRangeForNumericType<int64_t>(UINT64_C(0xffffffffffffffff))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>( |
| std::numeric_limits<int32_t>::lowest())); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>( |
| static_cast<int64_t>(std::numeric_limits<int32_t>::lowest()))); |
| EXPECT_TRUE(IsValueInRangeForNumericType<int64_t>( |
| std::numeric_limits<int64_t>::lowest())); |
| } |
| |
| TEST(SafeNumerics, CompoundNumericOperations) { |
| CheckedNumeric<int> a = 1; |
| CheckedNumeric<int> b = 2; |
| CheckedNumeric<int> c = 3; |
| CheckedNumeric<int> d = 4; |
| a += b; |
| EXPECT_EQ(3, a.ValueOrDie()); |
| a -= c; |
| EXPECT_EQ(0, a.ValueOrDie()); |
| d /= b; |
| EXPECT_EQ(2, d.ValueOrDie()); |
| d *= d; |
| EXPECT_EQ(4, d.ValueOrDie()); |
| |
| CheckedNumeric<int> too_large = std::numeric_limits<int>::max(); |
| EXPECT_TRUE(too_large.IsValid()); |
| too_large += d; |
| EXPECT_FALSE(too_large.IsValid()); |
| too_large -= d; |
| EXPECT_FALSE(too_large.IsValid()); |
| too_large /= d; |
| EXPECT_FALSE(too_large.IsValid()); |
| } |
| |
| TEST(SafeNumerics, VariadicNumericOperations) { |
| { // Synthetic scope to avoid variable naming collisions. |
| auto a = CheckAdd(1, 2UL, MakeCheckedNum(3LL), 4).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(a)::type>(10), a); |
| auto b = CheckSub(MakeCheckedNum(20.0), 2UL, 4).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(b)::type>(14.0), b); |
| auto c = CheckMul(20.0, MakeCheckedNum(1), 5, 3UL).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(c)::type>(300.0), c); |
| auto d = CheckDiv(20.0, 2.0, MakeCheckedNum(5LL), -4).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(d)::type>(-.5), d); |
| auto e = CheckMod(MakeCheckedNum(20), 3).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(e)::type>(2), e); |
| auto f = CheckLsh(1, MakeCheckedNum(2)).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(f)::type>(4), f); |
| auto g = CheckRsh(4, MakeCheckedNum(2)).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(g)::type>(1), g); |
| auto h = CheckRsh(CheckAdd(1, 1, 1, 1), CheckSub(4, 2)).ValueOrDie(); |
| EXPECT_EQ(static_cast<decltype(h)::type>(1), h); |
| } |
| |
| { |
| auto a = ClampAdd(1, 2UL, MakeClampedNum(3LL), 4); |
| EXPECT_EQ(static_cast<decltype(a)::type>(10), a); |
| auto b = ClampSub(MakeClampedNum(20.0), 2UL, 4); |
| EXPECT_EQ(static_cast<decltype(b)::type>(14.0), b); |
| auto c = ClampMul(20.0, MakeClampedNum(1), 5, 3UL); |
| EXPECT_EQ(static_cast<decltype(c)::type>(300.0), c); |
| auto d = ClampDiv(20.0, 2.0, MakeClampedNum(5LL), -4); |
| EXPECT_EQ(static_cast<decltype(d)::type>(-.5), d); |
| auto e = ClampMod(MakeClampedNum(20), 3); |
| EXPECT_EQ(static_cast<decltype(e)::type>(2), e); |
| auto f = ClampLsh(1, MakeClampedNum(2U)); |
| EXPECT_EQ(static_cast<decltype(f)::type>(4), f); |
| auto g = ClampRsh(4, MakeClampedNum(2U)); |
| EXPECT_EQ(static_cast<decltype(g)::type>(1), g); |
| auto h = ClampRsh(ClampAdd(1, 1, 1, 1), ClampSub(4U, 2)); |
| EXPECT_EQ(static_cast<decltype(h)::type>(1), h); |
| } |
| } |
| |
| #if defined(__clang__) |
| #pragma clang diagnostic pop // -Winteger-overflow |
| #endif |
| |
| } // namespace internal |
| } // namespace base |
