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C++ mozilla::FuzzyEqualsAdditive方法代码示例

本文整理汇总了C++中mozilla::FuzzyEqualsAdditive方法的典型用法代码示例。如果您正苦于以下问题：C++ mozilla::FuzzyEqualsAdditive方法的具体用法？C++ mozilla::FuzzyEqualsAdditive怎么用？C++ mozilla::FuzzyEqualsAdditive使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mozilla的用法示例。


在下文中一共展示了mozilla::FuzzyEqualsAdditive方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: SpecificNaN

static void
TestDoublesAreApproximatelyEqual()
{
  double epsilon = mozilla::detail::FuzzyEqualsEpsilon<double>::value();
  double lessThanEpsilon = epsilon / 2.0;
  double moreThanEpsilon = epsilon * 2.0;

  // Additive tests using the default epsilon
  // ... around 1.0
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 - lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 + epsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 - epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0, 1.0 + moreThanEpsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0, 1.0 - moreThanEpsilon));
  // ... around 1.0e4 (this is near the upper bound of the range where
  // adding moreThanEpsilon will still be representable and return false)
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e4, 1.0e4 + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e4, 1.0e4 + epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e4, 1.0e4 + moreThanEpsilon));
  // ... around 1.0e-25
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + moreThanEpsilon));
  // ... straddling 0
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-13, -1.0e-13));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-12, -1.0e-12));
  // Using a small epsilon
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-29));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-31));
  // Using a big epsilon
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e40, 1.0e40 + 1.0e25, 1.0e26));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e40, 1.0e40 + 1.0e25, 1.0e24));

  // Multiplicative tests using the default epsilon
  // ... around 1.0
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 - lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 + epsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 - epsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 + moreThanEpsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 - moreThanEpsilon));
  // ... around 1.0e30
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e30, 1.0e30 + (lessThanEpsilon * 1.0e30)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e30, 1.0e30 + (moreThanEpsilon * 1.0e30)));
  // ... around 1.0e-30
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-30, 1.0e-30 + (lessThanEpsilon * 1.0e-30)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-30, 1.0e-30 + (moreThanEpsilon * 1.0e-30)));
  // ... straddling 0
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-6, -1.0e-6));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-6, -1.0e-6, 1.0e2));
  // Using a small epsilon
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-15));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-16));
  // Using a big epsilon
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e40, 2.0e40, 1.0));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e40, 2.0e40, 0.1));

  // "real world case"
  double oneThird = 10.0 / 3.0;
  MOZ_ASSERT(FuzzyEqualsAdditive(10.0, 3.0 * oneThird));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(10.0, 3.0 * oneThird));
  // NaN check
  MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificNaN(1, 1), SpecificNaN(1, 1)));
  MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificNaN(1, 2), SpecificNaN(0, 8)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificNaN(1, 1), SpecificNaN(1, 1)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificNaN(1, 2), SpecificNaN(0, 200)));
}
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示例2: SpecificFloatNaN

static void
TestFloatsAreApproximatelyEqual()
{
  float epsilon = mozilla::detail::FuzzyEqualsEpsilon<float>::value();
  float lessThanEpsilon = epsilon / 2.0f;
  float moreThanEpsilon = epsilon * 2.0f;

  // Additive tests using the default epsilon
  // ... around 1.0
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f - lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f + epsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f - epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0f, 1.0f + moreThanEpsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0f, 1.0f - moreThanEpsilon));
  // ... around 1.0e2 (this is near the upper bound of the range where
  // adding moreThanEpsilon will still be representable and return false)
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e2f, 1.0e2f + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e2f, 1.0e2f + epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e2f, 1.0e2f + moreThanEpsilon));
  // ... around 1.0e-10
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + epsilon));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + moreThanEpsilon));
  // ... straddling 0
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-6f, -1.0e-6f));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-5f, -1.0e-5f));
  // Using a small epsilon
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-9f));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-11f));
  // Using a big epsilon
  MOZ_ASSERT(FuzzyEqualsAdditive(1.0e20f, 1.0e20f + 1.0e15f, 1.0e16f));
  MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e20f, 1.0e20f + 1.0e15f, 1.0e14f));

  // Multiplicative tests using the default epsilon
  // ... around 1.0
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f + lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f - lessThanEpsilon));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f + epsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f - epsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f + moreThanEpsilon));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f - moreThanEpsilon));
  // ... around 1.0e10
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e10f, 1.0e10f + (lessThanEpsilon * 1.0e10f)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e10f, 1.0e10f + (moreThanEpsilon * 1.0e10f)));
  // ... around 1.0e-10
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-10f, 1.0e-10f + (lessThanEpsilon * 1.0e-10f)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-10f, 1.0e-10f + (moreThanEpsilon * 1.0e-10f)));
  // ... straddling 0
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-6f, -1.0e-6f));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-6f, -1.0e-6f, 1.0e2f));
  // Using a small epsilon
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-4f));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-5f));
  // Using a big epsilon
  MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 2.0f, 1.0f));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 2.0f, 0.1f));

  // "real world case"
  float oneThird = 10.0f / 3.0f;
  MOZ_ASSERT(FuzzyEqualsAdditive(10.0f, 3.0f * oneThird));
  MOZ_ASSERT(FuzzyEqualsMultiplicative(10.0f, 3.0f * oneThird));
  // NaN check
  MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificFloatNaN(1, 1), SpecificFloatNaN(1, 1)));
  MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificFloatNaN(1, 2), SpecificFloatNaN(0, 8)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificFloatNaN(1, 1), SpecificFloatNaN(1, 1)));
  MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificFloatNaN(1, 2), SpecificFloatNaN(0, 200)));
}
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