ciabatta/inc/math.h

#pragma once

typedef float  float_t;
typedef double double_t;

#ifndef _HUGE_ENUF
#define _HUGE_ENUF  1e+300  // _HUGE_ENUF*_HUGE_ENUF must overflow
#endif

#define INFINITY       ((float)(_HUGE_ENUF * _HUGE_ENUF))
#define HUGE_VAL       ((double)INFINITY)
#define HUGE_VALF      ((float)INFINITY)

#define NAN            (-(float)(INFINITY * 0.0F))

#define FP_ILOGBNAN    (-1-0x7fffffff)
#define FP_ILOGB0      FP_ILOGBNAN

#define MATH_ERRNO     1
#define MATH_ERREXCEPT 2

#define math_errhandling (MATH_ERRNO | MATH_ERREXCEPT)

// Classification
#define FP_ZERO      0
#define FP_SUBNORMAL 1
#define FP_NORMAL    2
#define FP_INFINITE  4
#define FP_NAN       5
int     _fpclassify(double);
int     _fpclassifyf(float);
int     _fpclassifyl(long double);
#define fpclassify(x) (sizeof(x)==4?_fpclassifyf(x) \
                      :sizeof(x)==8?_fpclassify(x)  \
                      :             _fpclassifyl(x) )
#define isfinite(x)   (fpclassify(x) != FP_INFINITE && fpclassify(x) != FP_NAN)
#define isinf(x)      (fpclassify(x) == FP_INFINITE)
#define isnan(x)      (fpclassify(x) == FP_NAN)
#define isnormal(x)   (fpclassify(x) == FP_NORMAL)

// signbit shit
int     _signbit(double);
int     _signbitf(float);
int     _signbitl(long double);
#define signbit(x) (sizeof(x) == sizeof(float)  ? _signbitf(x) \
                   :sizeof(x) == sizeof(double) ? _signbit(x)  \
                   :                              _signbitl(x) )

// Ordering
#define isunordered(x,y)    (isnan((x)) ? ((void)(y),1) : isnan((y)))
#define isgreater(x,y)      (!isunordered(x,y) && ((x) > (y)))
#define isgreaterequal(x,y) (!isunordered(x,y) && ((x) >= (y)))
#define isless(x,y)         (!isunordered(x,y) && ((x) < (y)))
#define islessequal(x,y)    (!isunordered(x,y) && ((x) <= (y)))
#define islessgreater(x,y)  (!isunordered(x,y) && ((x) != (y)))

#if defined(_USE_MATH_DEFINES)
    #define M_E             2.7182818284590452354
    #define M_LOG2E         1.4426950408889634074
    #define M_LOG10E        0.43429448190325182765
    #define M_LN2           0.69314718055994530942
    #define M_LN10          2.30258509299404568402
    #define M_PI            3.14159265358979323846
    #define M_PI_2          1.57079632679489661923
    #define M_PI_4          0.78539816339744830962
    #define M_1_PI          0.31830988618379067154
    #define M_2_PI          0.63661977236758134308
    #define M_2_SQRTPI      1.12837916709551257390
    #define M_SQRT2         1.41421356237309504880
    #define M_SQRT1_2       0.70710678118654752440
#endif

// Floating-point function prototypes
double      acos       (double);
float       acosf      (float);
long double acosl      (long double);

double      acosh      (double);
float       acoshf     (float);
long double acoshl     (long double);

double      asin       (double);
float       asinf      (float);
long double asinl      (long double);

double      asinh      (double);
float       asinhf     (float);
long double asinhl     (long double);

double      atan       (double);
float       atanf      (float);
long double atanl      (long double);

double      atan2      (double, double);
float       atan2f     (float, float);
long double atan2l     (long double, long double);

double      atanh      (double);
float       atanhf     (float);
long double atanhl     (long double);

double      cbrt       (double);
float       cbrtf      (float);
long double cbrtl      (long double);

double      ceil       (double);
float       ceilf      (float);
long double ceill      (long double);

double      copysign   (double, double);
float       copysignf  (float, float);
long double copysignl  (long double, long double);

double      cos        (double);
float       cosf       (float);
long double cosl       (long double);

double      cosh       (double);
float       coshf      (float);
long double coshl      (long double);

double      erf        (double);
float       erff       (float);
long double erfl       (long double);

double      erfc       (double);
float       erfcf      (float);
long double erfcl      (long double);

double      exp        (double);
float       expf       (float);
long double expl       (long double);

double      exp2       (double);
float       exp2f      (float);
long double exp2l      (long double);

double      expm1      (double);
float       expm1f     (float);
long double expm1l     (long double);

double      fabs       (double);
float       fabsf      (float);
long double fabsl      (long double);

double      fdim       (double, double);
float       fdimf      (float, float);
long double fdiml      (long double, long double);

double      floor      (double);
float       floorf     (float);
long double floorl     (long double);

double      fma        (double, double, double);
float       fmaf       (float, float, float);
long double fmal       (long double, long double, long double);

double      fmax       (double, double);
float       fmaxf      (float, float);
long double fmaxl      (long double, long double);

double      fmin       (double, double);
float       fminf      (float, float);
long double fminl      (long double, long double);

double      fmod       (double, double);
float       fmodf      (float, float);
long double fmodl      (long double, long double);

double      frexp      (double, int *);
float       frexpf     (float, int *);
long double frexpl     (long double, int *);

double      hypot      (double, double);
float       hypotf     (float, float);
long double hypotl     (long double, long double);

int         ilogb      (double);
int         ilogbf     (float);
int         ilogbl     (long double);

double      ldexp      (double, int);
float       ldexpf     (float, int);
long double ldexpl     (long double, int);

double      lgamma     (double);
float       lgammaf    (float);
long double lgammal    (long double);

long long   llrint     (double);
long long   llrintf    (float);
long long   llrintl    (long double);

long long   llround    (double);
long long   llroundf   (float);
long long   llroundl   (long double);

double      log        (double);
float       logf       (float);
long double logl       (long double);

double      log10      (double);
float       log10f     (float);
long double log10l     (long double);

double      log1p      (double);
float       log1pf     (float);
long double log1pl     (long double);

double      log2       (double);
float       log2f      (float);
long double log2l      (long double);

double      logb       (double);
float       logbf      (float);
long double logbl      (long double);

long        lrint      (double);
long        lrintf     (float);
long        lrintl     (long double);

long        lround     (double);
long        lroundf    (float);
long        lroundl    (long double);

double      modf       (double, double *);
float       modff      (float, float *);
long double modfl      (long double, long double *);

double      nan        (const char *);
float       nanf       (const char *);
long double nanl       (const char *);

double      nearbyint  (double);
float       nearbyintf (float);
long double nearbyintl (long double);

double      nextafter  (double, double);
float       nextafterf (float, float);
long double nextafterl (long double, long double);

double      nexttoward (double, long double);
float       nexttowardf(float, long double);
long double nexttowardl(long double, long double);

double      pow        (double, double);
float       powf       (float, float);
long double powl       (long double, long double);

double      remainder  (double, double);
float       remainderf (float, float);
long double remainderl (long double, long double);

double      remquo     (double, double, int *);
float       remquof    (float, float, int *);
long double remquol    (long double, long double, int *);

double      rint       (double);
float       rintf      (float);
long double rintl      (long double);

double      round      (double);
float       roundf     (float);
long double roundl     (long double);

double      scalbln    (double, long);
float       scalblnf   (float, long);
long double scalblnl   (long double, long);

double      scalbn     (double, int);
float       scalbnf    (float, int);
long double scalbnl    (long double, int);

double      sin        (double);
float       sinf       (float);
long double sinl       (long double);

double      sinh       (double);
float       sinhf      (float);
long double sinhl      (long double);

double      sqrt       (double);
float       sqrtf      (float);
long double sqrtl      (long double);

double      tan        (double);
float       tanf       (float);
long double tanl       (long double);

double      tanh       (double);
float       tanhf      (float);
long double tanhl      (long double);

double      tgamma     (double);
float       tgammaf    (float);
long double tgammal    (long double);

double      trunc      (double);
float       truncf     (float);
long double truncl     (long double);