CGFloat: round, floor, abs, and 32/64 bit precision

Question

TLDR: How do I call standard floating point code in a way that compiles both 32 and 64 bit CGFloats without warnings?

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CGFloat is defined as either double or fl

Answer 1

If you only need a few functions you can use this instead:

#if CGFLOAT_IS_DOUBLE
#define roundCGFloat(x) round(x)
#define floorCGFloat(x) floor(x)
#define ceilCGFloat(x) ceil(x)
#else
#define roundCGFloat(x) roundf(x)
#define floorCGFloat(x) floorf(x)
#define ceilCGFloat(x) ceilf(x)
#endif

Answer 2

You may use those functions from tgmath.h.

#include <tgmath.h>

...

double d = 1.5;
double e = floor(d);   // will choose the 64-bit version of 'floor'

float f = 1.5f;
float g = floor(f);    // will choose the 32-bit version of 'floorf'.