1 /* $OpenBSD: math.h,v 1.8 2003/06/26 22:40:27 jason 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 */ 23 extern 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 #ifdef __vax__ 45 #define MAXFLOAT ((float)1.70141173319264430e+38) 46 #else 47 #define MAXFLOAT ((float)3.40282346638528860e+38) 48 #endif 49 50 extern int signgam; 51 52 #if !defined(_XOPEN_SOURCE) 53 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 54 55 #define _LIB_VERSION_TYPE enum fdversion 56 #define _LIB_VERSION _fdlib_version 57 58 /* if global variable _LIB_VERSION is not desirable, one may 59 * change the following to be a constant by: 60 * #define _LIB_VERSION_TYPE const enum version 61 * In that case, after one initializes the value _LIB_VERSION (see 62 * s_lib_version.c) during compile time, it cannot be modified 63 * in the middle of a program 64 */ 65 extern _LIB_VERSION_TYPE _LIB_VERSION; 66 67 #define _IEEE_ fdlibm_ieee 68 #define _SVID_ fdlibm_svid 69 #define _XOPEN_ fdlibm_xopen 70 #define _POSIX_ fdlibm_posix 71 72 #ifndef __cplusplus 73 struct exception { 74 int type; 75 char *name; 76 double arg1; 77 double arg2; 78 double retval; 79 }; 80 #endif 81 82 #define HUGE MAXFLOAT 83 84 /* 85 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 86 * (one may replace the following line by "#include <values.h>") 87 */ 88 89 #define X_TLOSS 1.41484755040568800000e+16 90 91 #define DOMAIN 1 92 #define SING 2 93 #define OVERFLOW 3 94 #define UNDERFLOW 4 95 #define TLOSS 5 96 #define PLOSS 6 97 98 #endif /* !_XOPEN_SOURCE */ 99 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 100 101 102 #include <sys/cdefs.h> 103 __BEGIN_DECLS 104 /* 105 * ANSI/POSIX 106 */ 107 extern double acos(double); 108 extern double asin(double); 109 extern double atan(double); 110 extern double atan2(double, double); 111 extern double cos(double); 112 extern double sin(double); 113 extern double tan(double); 114 115 extern double cosh(double); 116 extern double sinh(double); 117 extern double tanh(double); 118 119 extern double exp(double); 120 extern double frexp(double, int *); 121 extern double ldexp(double, int); 122 extern double log(double); 123 extern double log10(double); 124 extern double modf(double, double *); 125 126 extern double pow(double, double); 127 extern double sqrt(double); 128 129 extern double ceil(double); 130 extern double fabs(double); 131 extern double floor(double); 132 extern double fmod(double, double); 133 134 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 135 extern double erf(double); 136 extern double erfc(double); 137 extern double gamma(double); 138 extern double hypot(double, double); 139 extern int isinf(double); 140 extern int isnan(double); 141 extern int finite(double); 142 extern double j0(double); 143 extern double j1(double); 144 extern double jn(int, double); 145 extern double lgamma(double); 146 extern double y0(double); 147 extern double y1(double); 148 extern double yn(int, double); 149 150 #if !defined(_XOPEN_SOURCE) 151 extern double acosh(double); 152 extern double asinh(double); 153 extern double atanh(double); 154 extern double cbrt(double); 155 extern double logb(double); 156 extern double nextafter(double, double); 157 extern double remainder(double, double); 158 extern double scalb(double, double); 159 160 #ifdef __LIBM_PRIVATE 161 extern int matherr(struct exception *); 162 #endif 163 164 /* 165 * IEEE Test Vector 166 */ 167 extern double significand(double); 168 169 /* 170 * Functions callable from C, intended to support IEEE arithmetic. 171 */ 172 extern double copysign(double, double); 173 extern int ilogb(double); 174 extern double rint(double); 175 extern double scalbn(double, int); 176 177 /* 178 * BSD math library entry points 179 */ 180 extern double cabs(); 181 extern double drem(double, double); 182 extern double expm1(double); 183 extern double log1p(double); 184 185 /* 186 * Reentrant version of gamma & lgamma; passes signgam back by reference 187 * as the second argument; user must allocate space for signgam. 188 */ 189 #ifdef _REENTRANT 190 extern double gamma_r(double, int *); 191 extern double lgamma_r(double, int *); 192 #endif /* _REENTRANT */ 193 194 195 /* float versions of ANSI/POSIX functions */ 196 extern float acosf(float); 197 extern float asinf(float); 198 extern float atanf(float); 199 extern float atan2f(float, float); 200 extern float cosf(float); 201 extern float sinf(float); 202 extern float tanf(float); 203 204 extern float coshf(float); 205 extern float sinhf(float); 206 extern float tanhf(float); 207 208 extern float expf(float); 209 extern float frexpf(float, int *); 210 extern float ldexpf(float, int); 211 extern float logf(float); 212 extern float log10f(float); 213 extern float modff(float, float *); 214 215 extern float powf(float, float); 216 extern float sqrtf(float); 217 218 extern float ceilf(float); 219 extern float fabsf(float); 220 extern float floorf(float); 221 extern float fmodf(float, float); 222 223 extern float erff(float); 224 extern float erfcf(float); 225 extern float gammaf(float); 226 extern float hypotf(float, float); 227 extern int isinff(float); 228 extern int isnanf(float); 229 extern int finitef(float); 230 extern float j0f(float); 231 extern float j1f(float); 232 extern float jnf(int, float); 233 extern float lgammaf(float); 234 extern float y0f(float); 235 extern float y1f(float); 236 extern float ynf(int, float); 237 238 extern float acoshf(float); 239 extern float asinhf(float); 240 extern float atanhf(float); 241 extern float cbrtf(float); 242 extern float logbf(float); 243 extern float nextafterf(float, float); 244 extern float remainderf(float, float); 245 extern float scalbf(float, float); 246 247 /* 248 * float version of IEEE Test Vector 249 */ 250 extern float significandf(float); 251 252 /* 253 * Float versions of functions callable from C, intended to support 254 * IEEE arithmetic. 255 */ 256 extern float copysignf(float, float); 257 extern int ilogbf(float); 258 extern float rintf(float); 259 extern float scalbnf(float, int); 260 261 /* 262 * float versions of BSD math library entry points 263 */ 264 extern float cabsf (); 265 extern float dremf(float, float); 266 extern float expm1f(float); 267 extern float log1pf(float); 268 269 /* 270 * Float versions of reentrant version of gamma & lgamma; passes 271 * signgam back by reference as the second argument; user must 272 * allocate space for signgam. 273 */ 274 #ifdef _REENTRANT 275 extern float gammaf_r(float, int *); 276 extern float lgammaf_r(float, int *); 277 #endif /* _REENTRANT */ 278 279 #endif /* !_XOPEN_SOURCE */ 280 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 281 __END_DECLS 282 283 #endif /* _MATH_H_ */ 284