math.h revision 1.4
1/* $OpenBSD: math.h,v 1.4 2000/03/01 22:27:13 todd Exp $ */ 2/* 3 * ==================================================== 4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 5 * 6 * Developed at SunPro, a Sun Microsystems, Inc. business. 7 * Permission to use, copy, modify, and distribute this 8 * software is freely granted, provided that this notice 9 * is preserved. 10 * ==================================================== 11 */ 12 13/* 14 * from: @(#)fdlibm.h 5.1 93/09/24 15 */ 16 17#ifndef _MATH_H_ 18#define _MATH_H_ 19 20/* 21 * ANSI/POSIX 22 */ 23extern char __infinity[]; 24#define HUGE_VAL (*(double *) __infinity) 25 26/* 27 * XOPEN/SVID 28 */ 29#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 30#define M_E 2.7182818284590452354 /* e */ 31#define M_LOG2E 1.4426950408889634074 /* log 2e */ 32#define M_LOG10E 0.43429448190325182765 /* log 10e */ 33#define M_LN2 0.69314718055994530942 /* log e2 */ 34#define M_LN10 2.30258509299404568402 /* log e10 */ 35#define M_PI 3.14159265358979323846 /* pi */ 36#define M_PI_2 1.57079632679489661923 /* pi/2 */ 37#define M_PI_4 0.78539816339744830962 /* pi/4 */ 38#define M_1_PI 0.31830988618379067154 /* 1/pi */ 39#define M_2_PI 0.63661977236758134308 /* 2/pi */ 40#define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 41#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 42#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 43 44#define MAXFLOAT ((float)3.40282346638528860e+38) 45extern int signgam; 46 47#if !defined(_XOPEN_SOURCE) 48enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 49 50#define _LIB_VERSION_TYPE enum fdversion 51#define _LIB_VERSION _fdlib_version 52 53/* if global variable _LIB_VERSION is not desirable, one may 54 * change the following to be a constant by: 55 * #define _LIB_VERSION_TYPE const enum version 56 * In that case, after one initializes the value _LIB_VERSION (see 57 * s_lib_version.c) during compile time, it cannot be modified 58 * in the middle of a program 59 */ 60extern _LIB_VERSION_TYPE _LIB_VERSION; 61 62#define _IEEE_ fdlibm_ieee 63#define _SVID_ fdlibm_svid 64#define _XOPEN_ fdlibm_xopen 65#define _POSIX_ fdlibm_posix 66 67#ifdef __LIBM_PRIVATE 68struct exception { 69 int type; 70 char *name; 71 double arg1; 72 double arg2; 73 double retval; 74}; 75#endif 76 77#define HUGE MAXFLOAT 78 79/* 80 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 81 * (one may replace the following line by "#include <values.h>") 82 */ 83 84#define X_TLOSS 1.41484755040568800000e+16 85 86#define DOMAIN 1 87#define SING 2 88#define OVERFLOW 3 89#define UNDERFLOW 4 90#define TLOSS 5 91#define PLOSS 6 92 93#endif /* !_XOPEN_SOURCE */ 94#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 95 96 97#include <sys/cdefs.h> 98__BEGIN_DECLS 99/* 100 * ANSI/POSIX 101 */ 102extern double acos __P((double)); 103extern double asin __P((double)); 104extern double atan __P((double)); 105extern double atan2 __P((double, double)); 106extern double cos __P((double)); 107extern double sin __P((double)); 108extern double tan __P((double)); 109 110extern double cosh __P((double)); 111extern double sinh __P((double)); 112extern double tanh __P((double)); 113 114extern double exp __P((double)); 115extern double frexp __P((double, int *)); 116extern double ldexp __P((double, int)); 117extern double log __P((double)); 118extern double log10 __P((double)); 119extern double modf __P((double, double *)); 120 121extern double pow __P((double, double)); 122extern double sqrt __P((double)); 123 124extern double ceil __P((double)); 125extern double fabs __P((double)); 126extern double floor __P((double)); 127extern double fmod __P((double, double)); 128 129#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 130extern double erf __P((double)); 131extern double erfc __P((double)); 132extern double gamma __P((double)); 133extern double hypot __P((double, double)); 134extern int isinf __P((double)); 135extern int isnan __P((double)); 136extern int finite __P((double)); 137extern double j0 __P((double)); 138extern double j1 __P((double)); 139extern double jn __P((int, double)); 140extern double lgamma __P((double)); 141extern double y0 __P((double)); 142extern double y1 __P((double)); 143extern double yn __P((int, double)); 144 145#if !defined(_XOPEN_SOURCE) 146extern double acosh __P((double)); 147extern double asinh __P((double)); 148extern double atanh __P((double)); 149extern double cbrt __P((double)); 150extern double logb __P((double)); 151extern double nextafter __P((double, double)); 152extern double remainder __P((double, double)); 153extern double scalb __P((double, double)); 154 155#ifdef __LIBM_PRIVATE 156extern int matherr __P((struct exception *)); 157#endif 158 159/* 160 * IEEE Test Vector 161 */ 162extern double significand __P((double)); 163 164/* 165 * Functions callable from C, intended to support IEEE arithmetic. 166 */ 167extern double copysign __P((double, double)); 168extern int ilogb __P((double)); 169extern double rint __P((double)); 170extern double scalbn __P((double, int)); 171 172/* 173 * BSD math library entry points 174 */ 175extern double cabs(); 176extern double drem __P((double, double)); 177extern double expm1 __P((double)); 178extern double log1p __P((double)); 179 180/* 181 * Reentrant version of gamma & lgamma; passes signgam back by reference 182 * as the second argument; user must allocate space for signgam. 183 */ 184#ifdef _REENTRANT 185extern double gamma_r __P((double, int *)); 186extern double lgamma_r __P((double, int *)); 187#endif /* _REENTRANT */ 188 189 190/* float versions of ANSI/POSIX functions */ 191extern float acosf __P((float)); 192extern float asinf __P((float)); 193extern float atanf __P((float)); 194extern float atan2f __P((float, float)); 195extern float cosf __P((float)); 196extern float sinf __P((float)); 197extern float tanf __P((float)); 198 199extern float coshf __P((float)); 200extern float sinhf __P((float)); 201extern float tanhf __P((float)); 202 203extern float expf __P((float)); 204extern float frexpf __P((float, int *)); 205extern float ldexpf __P((float, int)); 206extern float logf __P((float)); 207extern float log10f __P((float)); 208extern float modff __P((float, float *)); 209 210extern float powf __P((float, float)); 211extern float sqrtf __P((float)); 212 213extern float ceilf __P((float)); 214extern float fabsf __P((float)); 215extern float floorf __P((float)); 216extern float fmodf __P((float, float)); 217 218extern float erff __P((float)); 219extern float erfcf __P((float)); 220extern float gammaf __P((float)); 221extern float hypotf __P((float, float)); 222extern int isinff __P((float)); 223extern int isnanf __P((float)); 224extern int finitef __P((float)); 225extern float j0f __P((float)); 226extern float j1f __P((float)); 227extern float jnf __P((int, float)); 228extern float lgammaf __P((float)); 229extern float y0f __P((float)); 230extern float y1f __P((float)); 231extern float ynf __P((int, float)); 232 233extern float acoshf __P((float)); 234extern float asinhf __P((float)); 235extern float atanhf __P((float)); 236extern float cbrtf __P((float)); 237extern float logbf __P((float)); 238extern float nextafterf __P((float, float)); 239extern float remainderf __P((float, float)); 240extern float scalbf __P((float, float)); 241 242/* 243 * float version of IEEE Test Vector 244 */ 245extern float significandf __P((float)); 246 247/* 248 * Float versions of functions callable from C, intended to support 249 * IEEE arithmetic. 250 */ 251extern float copysignf __P((float, float)); 252extern int ilogbf __P((float)); 253extern float rintf __P((float)); 254extern float scalbnf __P((float, int)); 255 256/* 257 * float versions of BSD math library entry points 258 */ 259extern float cabsf (); 260extern float dremf __P((float, float)); 261extern float expm1f __P((float)); 262extern float log1pf __P((float)); 263 264/* 265 * Float versions of reentrant version of gamma & lgamma; passes 266 * signgam back by reference as the second argument; user must 267 * allocate space for signgam. 268 */ 269#ifdef _REENTRANT 270extern float gammaf_r __P((float, int *)); 271extern float lgammaf_r __P((float, int *)); 272#endif /* _REENTRANT */ 273 274#endif /* !_XOPEN_SOURCE */ 275#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 276__END_DECLS 277 278#endif /* _MATH_H_ */ 279