/* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== */ /* * from: @(#)fdlibm.h 5.1 93/09/24 * $FreeBSD$ */ #ifndef _MATH_H_ #define _MATH_H_ /* * ANSI/POSIX */ extern const union __infinity_un { unsigned char __uc[8]; double __ud; } __infinity; #define HUGE_VAL (__infinity.__ud) /* * XOPEN/SVID */ #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) #define M_E 2.7182818284590452354 /* e */ #define M_LOG2E 1.4426950408889634074 /* log 2e */ #define M_LOG10E 0.43429448190325182765 /* log 10e */ #define M_LN2 0.69314718055994530942 /* log e2 */ #define M_LN10 2.30258509299404568402 /* log e10 */ #define M_PI 3.14159265358979323846 /* pi */ #define M_PI_2 1.57079632679489661923 /* pi/2 */ #define M_PI_4 0.78539816339744830962 /* pi/4 */ #define M_1_PI 0.31830988618379067154 /* 1/pi */ #define M_2_PI 0.63661977236758134308 /* 2/pi */ #define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ #define MAXFLOAT ((float)3.40282346638528860e+38) extern int signgam; #if !defined(_XOPEN_SOURCE) enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; #define _LIB_VERSION_TYPE enum fdversion #define _LIB_VERSION _fdlib_version /* if global variable _LIB_VERSION is not desirable, one may * change the following to be a constant by: * #define _LIB_VERSION_TYPE const enum version * In that case, after one initializes the value _LIB_VERSION (see * s_lib_version.c) during compile time, it cannot be modified * in the middle of a program */ extern _LIB_VERSION_TYPE _LIB_VERSION; #define _IEEE_ fdlibm_ieee #define _SVID_ fdlibm_svid #define _XOPEN_ fdlibm_xopen #define _POSIX_ fdlibm_posix /* We have a problem when using C++ since `exception' is a reserved name in C++. */ #ifndef __cplusplus struct exception { int type; char *name; double arg1; double arg2; double retval; }; #endif #if 0 /* Old value from 4.4BSD-Lite math.h; this is probably better. */ #define HUGE HUGE_VAL #else #define HUGE MAXFLOAT #endif /* * set X_TLOSS = pi*2**52, which is possibly defined in * (one may replace the following line by "#include ") */ #define X_TLOSS 1.41484755040568800000e+16 #define DOMAIN 1 #define SING 2 #define OVERFLOW 3 #define UNDERFLOW 4 #define TLOSS 5 #define PLOSS 6 #endif /* !_XOPEN_SOURCE */ #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ #include /* * Most of these functions have the side effect of setting errno, so they * are not declared as __pure2. (XXX: this point needs to be revisited, * since C99 doesn't require the mistake of setting errno, and we mostly * don't set it anyway. In C99, pragmas and functions for changing the * rounding mode affect the purity of these functions.) */ __BEGIN_DECLS /* * ANSI/POSIX */ double acos(double); double asin(double); double atan(double); double atan2(double, double); double cos(double); double sin(double); double tan(double); double cosh(double); double sinh(double); double tanh(double); double exp(double); double frexp(double, int *); /* fundamentally !__pure2 */ double ldexp(double, int); double log(double); double log10(double); double modf(double, double *); /* fundamentally !__pure2 */ double pow(double, double); double sqrt(double); double ceil(double); double fabs(double); double floor(double); double fmod(double, double); /* * These functions are not in C90 so they can be "right". The ones that * never set errno in lib/msun are declared as __pure2. */ #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) double erf(double); double erfc(double) __pure2; int finite(double) __pure2; double gamma(double); double hypot(double, double); int isinf(double) __pure2; int isnan(double) __pure2; double j0(double); double j1(double); double jn(int, double); double lgamma(double); double y0(double); double y1(double); double yn(int, double); #if !defined(_XOPEN_SOURCE) double acosh(double); double asinh(double); double atanh(double); double cbrt(double) __pure2; double logb(double) __pure2; double nextafter(double, double); double remainder(double, double); double scalb(double, double); double tgamma(double); #ifndef __cplusplus int matherr(struct exception *); #endif /* * IEEE Test Vector */ double significand(double); /* * Functions callable from C, intended to support IEEE arithmetic. */ double copysign(double, double) __pure2; int ilogb(double); double rint(double) __pure2; double scalbn(double, int); /* * BSD math library entry points */ double drem(double, double); double expm1(double) __pure2; double log1p(double) __pure2; /* * Reentrant version of gamma & lgamma; passes signgam back by reference * as the second argument; user must allocate space for signgam. */ #ifdef _REENTRANT double gamma_r(double, int *); double lgamma_r(double, int *); #endif /* _REENTRANT */ /* float versions of ANSI/POSIX functions */ float acosf(float); float asinf(float); float atanf(float); float atan2f(float, float); float cosf(float); float sinf(float); float tanf(float); float coshf(float); float sinhf(float); float tanhf(float); float expf(float); float frexpf(float, int *); /* fundamentally !__pure2 */ float ldexpf(float, int); float logf(float); float log10f(float); float modff(float, float *); /* fundamentally !__pure2 */ float powf(float, float); float sqrtf(float); float ceilf(float); float fabsf(float); float floorf(float); float fmodf(float, float); float erff(float); float erfcf(float) __pure2; int finitef(float) __pure2; float gammaf(float); float hypotf(float, float) __pure2; int isnanf(float) __pure2; float j0f(float); float j1f(float); float jnf(int, float); float lgammaf(float); float y0f(float); float y1f(float); float ynf(int, float); float acoshf(float); float asinhf(float); float atanhf(float); float cbrtf(float) __pure2; float logbf(float) __pure2; float nextafterf(float, float); float remainderf(float, float); float scalbf(float, float); /* * float version of IEEE Test Vector */ float significandf(float); /* * Float versions of functions callable from C, intended to support * IEEE arithmetic. */ float copysignf(float, float) __pure2; int ilogbf(float); float rintf(float); float scalbnf(float, int); /* * float versions of BSD math library entry points */ float dremf(float, float); float expm1f(float) __pure2; float log1pf(float) __pure2; /* * Float versions of reentrant version of gamma & lgamma; passes * signgam back by reference as the second argument; user must * allocate space for signgam. */ #ifdef _REENTRANT float gammaf_r(float, int *); float lgammaf_r(float, int *); #endif /* _REENTRANT */ #endif /* !_XOPEN_SOURCE */ #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ __END_DECLS #endif /* !_MATH_H_ */