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mathlib Limits constexpr helpers don't use references (#11411)

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- fixes #11408
 - cleanup Limits.hpp
This commit is contained in:
Daniel Agar
2019-02-08 14:10:09 -05:00
committed by GitHub
parent 13634e6757
commit 2217faf812
2 changed files with 18 additions and 23 deletions
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src/lib/mathlib/math/Limits.hpp
+11 -22
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@@ -47,71 +47,60 @@
#define MATH_PI 3.141592653589793238462643383280
#endif
//this should be defined in stdint.h, but seems to be missing in the ARM toolchain (5.2.0)
#ifndef UINT64_C
# if __WORDSIZE == 64
# define UINT64_C(c) c ## UL
# else
# define UINT64_C(c) c ## ULL
# endif
#endif
namespace math
{
template<typename _Tp>
constexpr const _Tp &min(const _Tp &a, const _Tp &b)
constexpr _Tp min(_Tp a, _Tp b)
{
return (a < b) ? a : b;
}
template<typename _Tp>
constexpr const _Tp &max(const _Tp &a, const _Tp &b)
constexpr _Tp max(_Tp a, _Tp b)
{
return (a > b) ? a : b;
}
template<typename _Tp>
constexpr const _Tp &constrain(const _Tp &val, const _Tp &min_val, const _Tp &max_val)
constexpr _Tp constrain(_Tp val, _Tp min_val, _Tp max_val)
{
return (val < min_val) ? min_val : ((val > max_val) ? max_val : val);
}
/** Constrain float values to valid values for int16_t.
* Invalid values are just clipped to be in the range for int16_t. */
inline int16_t constrainFloatToInt16(float value)
constexpr int16_t constrainFloatToInt16(float value)
{
return (int16_t)math::constrain(value, (float)INT16_MIN, (float)INT16_MAX);
}
template<typename _Tp>
inline constexpr bool isInRange(const _Tp &val, const _Tp &min_val, const _Tp &max_val)
constexpr bool isInRange(_Tp val, _Tp min_val, _Tp max_val)
{
return (min_val <= val) && (val <= max_val);
}
template<typename T>
constexpr T radians(const T degrees)
constexpr T radians(T degrees)
{
return degrees * (static_cast<T>(MATH_PI) / static_cast<T>(180));
}
template<typename T>
constexpr T degrees(const T radians)
constexpr T degrees(T radians)
{
return radians * (static_cast<T>(180) / static_cast<T>(MATH_PI));
}
/** Save way to check if float is zero */
inline bool isZero(const float val)
/** Safe way to check if float is zero */
inline bool isZero(float val)
{
return fabsf(val - 0.0f) < FLT_EPSILON;
}
/** Save way to check if double is zero */
inline bool isZero(const double val)
/** Safe way to check if double is zero */
inline bool isZero(double val)
{
return fabs(val - 0.0) < DBL_EPSILON;
}