anonymous_namespace{GraphicsDataCacheTests.cpp} Namespace Reference

Classes
struct	CacheElement

Functions
void	CheckCacheElementLookup (GraphicsDataCache< CacheElement > &cache, const ZoomInfo &zoomInfo, double t0, double t1, size_t count)

Detailed Description

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Audacity: A Digital Audio Editor

GraphicsDataCacheTests.cpp

Dmitry Vedenko

Function Documentation

CheckCacheElementLookup()

void anonymous_namespace{GraphicsDataCacheTests.cpp}::CheckCacheElementLookup	(	GraphicsDataCache< CacheElement > &	cache,
		const ZoomInfo &	zoomInfo,
		double	t0,
		double	t1,
		size_t	count
	)

Definition at line 38 of file GraphicsDataCacheTests.cpp.

{
   auto range = cache.PerformLookup(zoomInfo, t0, t1);
 
   REQUIRE(count == range.size());
 
   if (count == 0)
      return;
 
   const size_t t0Pixel = zoomInfo.TimeToPosition(t0);
   const size_t t0Bin = t0Pixel / GraphicsDataCacheBase::CacheElementWidth;
 
   const size_t leftOffset =
      t0Pixel - t0Bin * GraphicsDataCacheBase::CacheElementWidth;
 
   const size_t rightOffset =
      (t0Bin + count) * GraphicsDataCacheBase::CacheElementWidth -
                              zoomInfo.TimeToPosition(t1) - 1;
 
   const auto age = range.first->LastCacheAccess;
 
   if (count == 1)
   {
      REQUIRE(range.first.GetLeftOffset() == leftOffset);
      REQUIRE(range.first.GetRightOffset() == rightOffset);
   }
   else
   {
      REQUIRE(range.first.GetLeftOffset() == leftOffset);
      REQUIRE(range.first.GetRightOffset() == 0);
 
      auto it = range.first;
      ++it;
 
      while (--count > 1)
      {
         REQUIRE(it.GetLeftOffset() == 0);
         REQUIRE(it.GetRightOffset() == 0);
         REQUIRE(it->LastCacheAccess == age);
 
         ++it;
      }
 
      REQUIRE(it.GetLeftOffset() == 0);
      REQUIRE(it.GetRightOffset() == rightOffset);
      REQUIRE(it->LastCacheAccess == age);
   }
}

References GraphicsDataCacheBase::CacheElementWidth, GraphicsDataCache< CacheElementType >::PerformLookup(), and ZoomInfo::TimeToPosition().

Referenced by TEST_CASE().

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