RoundUpUnsafe.h File Reference

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Functions
template<typename LType , typename RType >
auto	RoundUpUnsafe (LType numerator, RType denominator) noexcept
	Returns a rounded up integer result for numerator / denominator. More...

Function Documentation

RoundUpUnsafe()

template<typename LType , typename RType >

auto RoundUpUnsafe ( LType  numerator, RType  denominator  )

noexcept

Returns a rounded up integer result for numerator / denominator.

RoundUpUnsafe(4, 2) == 2; RoundUpUnsafe(3, 2) == 2; RoundUpUnsafe(-3, 2) == -1;

This function does not check if denominator is 0 of if there is an integer overflow.

Definition at line 21 of file RoundUpUnsafe.h.

{
   static_assert(std::is_integral_v<LType>);
   static_assert(std::is_integral_v<RType>);
 
   if constexpr (std::is_unsigned_v<LType> && std::is_unsigned_v<RType>)
   {
      return (numerator + denominator - 1) / denominator;
   }
   else
   {
      if (numerator > 0 && denominator > 0)
      {
         return (numerator + denominator - 1) / denominator;
      }
      else
      {
         const auto result = numerator / denominator;
 
         if (result < 0 || result * denominator == numerator)
            return result;
         else
            return result + 1;
      }
   }
}

Referenced by anonymous_namespace{WaveDataCache.cpp}::AppendBufferHelper::FillBlocksFromAppendBuffer(), anonymous_namespace{WaveDataCache.cpp}::AppendBufferHelper::FillBuffer(), anonymous_namespace{WaveDataCache.cpp}::MakeDefaultDataProvider(), GraphicsDataCacheBase::PerformCleanup(), and anonymous_namespace{WaveDataCache.cpp}::processBlock().

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