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Merge pull request #4358 from IvanSavenko/integer_divide

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Add helper functions for integer division rounding
This commit is contained in:
Ivan Savenko
2024-08-06 18:10:03 +03:00
committed by GitHub
parent 3b6ff46d2b 81e6207df0
commit a4dd510735
5 changed files with 33 additions and 5 deletions
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27
Global.h
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@@ -706,6 +706,33 @@ namespace vstd
return a + (b - a) * f;
}
/// Divides dividend by divisor and rounds result up
/// For use with integer-only arithmetic
template<typename Integer1, typename Integer2>
Integer1 divideAndCeil(const Integer1 & dividend, const Integer2 & divisor)
{
static_assert(std::is_integral_v<Integer1> && std::is_integral_v<Integer2>, "This function should only be used with integral types");
return (dividend + divisor - 1) / divisor;
}
/// Divides dividend by divisor and rounds result to nearest
/// For use with integer-only arithmetic
template<typename Integer1, typename Integer2>
Integer1 divideAndRound(const Integer1 & dividend, const Integer2 & divisor)
{
static_assert(std::is_integral_v<Integer1> && std::is_integral_v<Integer2>, "This function should only be used with integral types");
return (dividend + divisor / 2 - 1) / divisor;
}
/// Divides dividend by divisor and rounds result down
/// For use with integer-only arithmetic
template<typename Integer1, typename Integer2>
Integer1 divideAndFloor(const Integer1 & dividend, const Integer2 & divisor)
{
static_assert(std::is_integral_v<Integer1> && std::is_integral_v<Integer2>, "This function should only be used with integral types");
return dividend / divisor;
}
template<typename Floating>
bool isAlmostZero(const Floating & value)
{