math.h revision 1.13
1/* $NetBSD: math.h,v 1.13 1998/05/11 11:06:23 kleink Exp $ */ 2 3/* 4 * ==================================================== 5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6 * 7 * Developed at SunPro, a Sun Microsystems, Inc. business. 8 * Permission to use, copy, modify, and distribute this 9 * software is freely granted, provided that this notice 10 * is preserved. 11 * ==================================================== 12 */ 13 14/* 15 * @(#)fdlibm.h 5.1 93/09/24 16 */ 17 18#ifndef _MATH_H_ 19#define _MATH_H_ 20 21#include <sys/featuretest.h> 22 23/* 24 * ANSI/POSIX 25 */ 26extern char __infinity[]; 27#define HUGE_VAL (*(double *) __infinity) 28 29/* 30 * XOPEN/SVID 31 */ 32#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) || \ 33 defined(_XOPEN_SOURCE) 34#define M_E 2.7182818284590452354 /* e */ 35#define M_LOG2E 1.4426950408889634074 /* log 2e */ 36#define M_LOG10E 0.43429448190325182765 /* log 10e */ 37#define M_LN2 0.69314718055994530942 /* log e2 */ 38#define M_LN10 2.30258509299404568402 /* log e10 */ 39#define M_PI 3.14159265358979323846 /* pi */ 40#define M_PI_2 1.57079632679489661923 /* pi/2 */ 41#define M_PI_4 0.78539816339744830962 /* pi/4 */ 42#define M_1_PI 0.31830988618379067154 /* 1/pi */ 43#define M_2_PI 0.63661977236758134308 /* 2/pi */ 44#define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 45#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 46#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 47 48#define MAXFLOAT ((float)3.40282346638528860e+38) 49extern int signgam; 50#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE || _XOPEN_SOURCE */ 51 52#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 53 !defined(_XOPEN_SOURCE) 54enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 55 56#define _LIB_VERSION_TYPE enum fdversion 57#define _LIB_VERSION _fdlib_version 58 59/* if global variable _LIB_VERSION is not desirable, one may 60 * change the following to be a constant by: 61 * #define _LIB_VERSION_TYPE const enum version 62 * In that case, after one initializes the value _LIB_VERSION (see 63 * s_lib_version.c) during compile time, it cannot be modified 64 * in the middle of a program 65 */ 66extern _LIB_VERSION_TYPE _LIB_VERSION; 67 68#define _IEEE_ fdlibm_ieee 69#define _SVID_ fdlibm_svid 70#define _XOPEN_ fdlibm_xopen 71#define _POSIX_ fdlibm_posix 72 73#ifndef __cplusplus 74struct exception { 75 int type; 76 char *name; 77 double arg1; 78 double arg2; 79 double retval; 80}; 81#endif 82 83#define HUGE MAXFLOAT 84 85/* 86 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 87 * (one may replace the following line by "#include <values.h>") 88 */ 89 90#define X_TLOSS 1.41484755040568800000e+16 91 92#define DOMAIN 1 93#define SING 2 94#define OVERFLOW 3 95#define UNDERFLOW 4 96#define TLOSS 5 97#define PLOSS 6 98 99#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 100 101 102#include <sys/cdefs.h> 103__BEGIN_DECLS 104/* 105 * ANSI/POSIX 106 */ 107extern double acos __P((double)); 108extern double asin __P((double)); 109extern double atan __P((double)); 110extern double atan2 __P((double, double)); 111extern double cos __P((double)); 112extern double sin __P((double)); 113extern double tan __P((double)); 114 115extern double cosh __P((double)); 116extern double sinh __P((double)); 117extern double tanh __P((double)); 118 119extern double exp __P((double)); 120extern double frexp __P((double, int *)); 121extern double ldexp __P((double, int)); 122extern double log __P((double)); 123extern double log10 __P((double)); 124extern double modf __P((double, double *)); 125 126extern double pow __P((double, double)); 127extern double sqrt __P((double)); 128 129extern double ceil __P((double)); 130extern double fabs __P((double)); 131extern double floor __P((double)); 132extern double fmod __P((double, double)); 133 134#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) || \ 135 defined(_XOPEN_SOURCE) 136extern double erf __P((double)); 137extern double erfc __P((double)); 138extern double gamma __P((double)); 139extern double hypot __P((double, double)); 140extern int isinf __P((double)); 141extern int isnan __P((double)); 142extern int finite __P((double)); 143extern double j0 __P((double)); 144extern double j1 __P((double)); 145extern double jn __P((int, double)); 146extern double lgamma __P((double)); 147extern double y0 __P((double)); 148extern double y1 __P((double)); 149extern double yn __P((int, double)); 150 151#if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500 152extern double acosh __P((double)); 153extern double asinh __P((double)); 154extern double atanh __P((double)); 155extern double cbrt __P((double)); 156extern double expm1 __P((double)); 157extern int ilogb __P((double)); 158extern double log1p __P((double)); 159extern double logb __P((double)); 160extern double nextafter __P((double, double)); 161extern double remainder __P((double, double)); 162extern double rint __P((double)); 163extern double scalb __P((double, double)); 164#endif /* !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500 */ 165#endif /* !_ANSI_SOURCE) && !_POSIX_C_SOURCE || _XOPEN_SOURCE */ 166 167#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 168 !defined(_XOPEN_SOURCE) 169#ifndef __cplusplus 170extern int matherr __P((struct exception *)); 171#endif 172 173/* 174 * IEEE Test Vector 175 */ 176extern double significand __P((double)); 177 178/* 179 * Functions callable from C, intended to support IEEE arithmetic. 180 */ 181extern double copysign __P((double, double)); 182extern double scalbn __P((double, int)); 183 184/* 185 * BSD math library entry points 186 */ 187extern double cabs(); 188extern double drem __P((double, double)); 189 190#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 191 192#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 193 !defined(_XOPEN_SOURCE) || defined(_REENTRANT) 194/* 195 * Reentrant version of gamma & lgamma; passes signgam back by reference 196 * as the second argument; user must allocate space for signgam. 197 */ 198extern double gamma_r __P((double, int *)); 199extern double lgamma_r __P((double, int *)); 200#endif /* !... || _REENTRANT */ 201 202 203#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 204 !defined(_XOPEN_SOURCE) 205/* float versions of ANSI/POSIX functions */ 206extern float acosf __P((float)); 207extern float asinf __P((float)); 208extern float atanf __P((float)); 209extern float atan2f __P((float, float)); 210extern float cosf __P((float)); 211extern float sinf __P((float)); 212extern float tanf __P((float)); 213 214extern float coshf __P((float)); 215extern float sinhf __P((float)); 216extern float tanhf __P((float)); 217 218extern float expf __P((float)); 219extern float frexpf __P((float, int *)); 220extern float ldexpf __P((float, int)); 221extern float logf __P((float)); 222extern float log10f __P((float)); 223extern float modff __P((float, float *)); 224 225extern float powf __P((float, float)); 226extern float sqrtf __P((float)); 227 228extern float ceilf __P((float)); 229extern float fabsf __P((float)); 230extern float floorf __P((float)); 231extern float fmodf __P((float, float)); 232 233extern float erff __P((float)); 234extern float erfcf __P((float)); 235extern float gammaf __P((float)); 236extern float hypotf __P((float, float)); 237extern int isnanf __P((float)); 238extern int finitef __P((float)); 239extern float j0f __P((float)); 240extern float j1f __P((float)); 241extern float jnf __P((int, float)); 242extern float lgammaf __P((float)); 243extern float y0f __P((float)); 244extern float y1f __P((float)); 245extern float ynf __P((int, float)); 246 247extern float acoshf __P((float)); 248extern float asinhf __P((float)); 249extern float atanhf __P((float)); 250extern float cbrtf __P((float)); 251extern float logbf __P((float)); 252extern float nextafterf __P((float, float)); 253extern float remainderf __P((float, float)); 254extern float scalbf __P((float, float)); 255 256/* 257 * float version of IEEE Test Vector 258 */ 259extern float significandf __P((float)); 260 261/* 262 * Float versions of functions callable from C, intended to support 263 * IEEE arithmetic. 264 */ 265extern float copysignf __P((float, float)); 266extern int ilogbf __P((float)); 267extern float rintf __P((float)); 268extern float scalbnf __P((float, int)); 269 270/* 271 * float versions of BSD math library entry points 272 */ 273extern float cabsf (); 274extern float dremf __P((float, float)); 275extern float expm1f __P((float)); 276extern float log1pf __P((float)); 277#endif /* !_ANSI_SOURCE && !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 278 279#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 280 !defined(_XOPEN_SOURCE) || defined(_REENTRANT) 281/* 282 * Float versions of reentrant version of gamma & lgamma; passes 283 * signgam back by reference as the second argument; user must 284 * allocate space for signgam. 285 */ 286extern float gammaf_r __P((float, int *)); 287extern float lgammaf_r __P((float, int *)); 288#endif /* !... || _REENTRANT */ 289 290__END_DECLS 291 292#endif /* _MATH_H_ */ 293