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

// Classification
#define FP_INFINITE  0
#define FP_NAN       1
#define FP_NORMAL    2
#define FP_SUBNORMAL 3
#define FP_ZERO      4
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);