103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
#pragma once
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#include "fl/has_include.h"
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#if FL_HAS_INCLUDE(<math.h>)
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#include <math.h> // for early definitions of M_PI and other math macros.
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#endif // FL_HAS_INCLUDE(<math.h>)
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#include "fl/compiler_control.h"
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#include "fl/type_traits.h"
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namespace fl {
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// Fun fact, we can't define any function by the name of min,max,abs because
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// on some platforms these are macros. Therefore we can only use fl_min, fl_max, fl_abs.
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// This is needed for math macro ABS to work optimally.
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template <typename T> inline T fl_abs(T value) {
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return value < 0 ? -value : value;
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}
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FL_DISABLE_WARNING_PUSH
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FL_DISABLE_WARNING(sign-compare)
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FL_DISABLE_WARNING_FLOAT_CONVERSION
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FL_DISABLE_WARNING_SIGN_CONVERSION
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FL_DISABLE_WARNING_IMPLICIT_INT_CONVERSION
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FL_DISABLE_WARNING_FLOAT_CONVERSION
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// Template functions for MIN and MAX to avoid statement repetition
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// Returns the most promotable type between the two arguments
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template <typename T, typename U> inline common_type_t<T, U> fl_min(T a, U b) {
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return (a < b) ? a : b;
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}
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template <typename T, typename U> inline common_type_t<T, U> fl_max(T a, U b) {
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return (a > b) ? a : b;
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}
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FL_DISABLE_WARNING_POP
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} // namespace fl
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#ifndef MAX
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#define MAX(a, b) fl::fl_max(a, b)
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#endif
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#ifndef MIN
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#define MIN(a, b) fl::fl_min(a, b)
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#endif
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#ifndef ABS
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#define ABS(x) fl::fl_abs(x)
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#endif
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#ifndef EPSILON_F
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// smallest possible float
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#define EPSILON_F 1.19209290e-07F
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#endif
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#ifndef EPSILON_D
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// smallest possible double
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#define EPSILON_D 2.2204460492503131e-16
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#endif
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#ifndef ALMOST_EQUAL
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#define ALMOST_EQUAL(a, b, small) (ABS((a) - (b)) < small)
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#endif
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#ifndef ALMOST_EQUAL_FLOAT
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#define ALMOST_EQUAL_FLOAT(a, b) (ABS((a) - (b)) < EPSILON_F)
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#endif
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#ifndef ALMOST_EQUAL_DOUBLE
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#define ALMOST_EQUAL_EPSILON(a, b, epsilon) (ABS((a) - (b)) < (epsilon))
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#endif
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#ifndef ALMOST_EQUAL_DOUBLE
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#define ALMOST_EQUAL_DOUBLE(a, b) ALMOST_EQUAL_EPSILON(a, b, EPSILON_F)
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#endif
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#ifndef INFINITY_DOUBLE
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#define INFINITY_DOUBLE (1.0 / 0.0)
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#endif
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#ifndef INFINITY_FLOAT
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#define INFINITY_FLOAT (1.0f / 0.0f)
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#endif
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#ifndef FLT_MAX
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#define FLT_MAX 3.402823466e+38F
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#endif
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#ifndef PI
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#define PI 3.1415926535897932384626433832795
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#endif
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#ifndef M_PI
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#define M_PI PI
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#endif
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