CoreGraphicsやCoreAnimationなどで頻繁にお世話になるCocoaの浮動小数点系のCGFloatですが、使い方を間違えると思わぬバグを生みます。 というのも、 CGFloatは32bit/64bit環境によって型が違う からなんですが。 #if defined(__LP64__) && __LP64__ # define CGFLOAT_TYPE double # define CGFLOAT_IS_DOUBLE 1 # define CGFLOAT_MIN DBL_MIN # define CGFLOAT_MAX DBL_MAX #else # define CGFLOAT_TYPE float # define CGFLOAT_IS_DOUBLE 0 # define CGFLOAT_MIN FLT_MIN # define CGFLOAT_MAX FLT_MAX
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