1 /* 2 * ==================================================== 3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 4 * 5 * Developed at SunPro, a Sun Microsystems, Inc. business. 6 * Permission to use, copy, modify, and distribute this 7 * software is freely granted, provided that this notice 8 * is preserved. 9 * ==================================================== 10 */ 11 12 /* 13 * from: @(#)fdlibm.h 5.1 93/09/24 14 * $FreeBSD: src/lib/msun/src/math.h,v 1.8 1999/08/28 00:06:42 peter Exp $ 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 #ifndef PI 45 #define PI M_PI 46 #endif 47 #ifndef PI2 48 #define PI2 M_PI_2 49 #endif 50 51 #define MAXFLOAT ((float)3.40282346638528860e+38) 52 extern int signgam; 53 54 #if !defined(_XOPEN_SOURCE) 55 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 56 57 #define _LIB_VERSION_TYPE enum fdversion 58 #define _LIB_VERSION _fdlib_version 59 60 /* if global variable _LIB_VERSION is not desirable, one may 61 * change the following to be a constant by: 62 * #define _LIB_VERSION_TYPE const enum version 63 * In that case, after one initializes the value _LIB_VERSION (see 64 * s_lib_version.c) during compile time, it cannot be modified 65 * in the middle of a program 66 */ 67 extern _LIB_VERSION_TYPE _LIB_VERSION; 68 69 #define _IEEE_ fdlibm_ieee 70 #define _SVID_ fdlibm_svid 71 #define _XOPEN_ fdlibm_xopen 72 #define _POSIX_ fdlibm_posix 73 74 #ifndef __cplusplus 75 struct exception { 76 int type; 77 char *name; 78 double arg1; 79 double arg2; 80 double retval; 81 }; 82 #endif 83 84 #define HUGE MAXFLOAT 85 86 /* 87 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 88 * (one may replace the following line by "#include <values.h>") 89 */ 90 91 #define X_TLOSS 1.41484755040568800000e+16 92 93 #define DOMAIN 1 94 #define SING 2 95 #define OVERFLOW 3 96 #define UNDERFLOW 4 97 #define TLOSS 5 98 #define PLOSS 6 99 100 #endif /* !_XOPEN_SOURCE */ 101 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 102 103 104 #ifdef __cplusplus 105 extern "C" 106 { 107 #endif 108 109 /* 110 * ANSI/POSIX 111 */ 112 extern double acos(double); 113 extern double asin(double); 114 extern double atan(double); 115 extern double atan2(double, double); 116 extern double cos(double); 117 extern double sin(double); 118 extern double tan(double); 119 120 extern double cosh(double); 121 extern double sinh(double); 122 extern double tanh(double); 123 124 extern double exp(double); 125 extern double frexp(double, int *); 126 extern double ldexp(double, int); 127 extern double log(double); 128 extern double log10(double); 129 extern double modf(double, double *); 130 131 extern double pow(double, double); 132 extern double sqrt(double); 133 134 extern double ceil(double); 135 extern double fabs(double); 136 extern double floor(double); 137 extern double fmod(double, double); 138 139 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 140 extern double erf(double); 141 extern double erfc(double); 142 extern double gamma(double); 143 extern double hypot(double, double); 144 extern int isinf(double); 145 extern int isnan(double); 146 extern int finite(double); 147 extern double j0(double); 148 extern double j1(double); 149 extern double jn(int, double); 150 extern double lgamma(double); 151 extern double y0(double); 152 extern double y1(double); 153 extern double yn(int, double); 154 155 #if !defined(_XOPEN_SOURCE) 156 extern double acosh(double); 157 extern double asinh(double); 158 extern double atanh(double); 159 extern double cbrt(double); 160 extern double logb(double); 161 extern double nextafter(double, double); 162 extern double remainder(double, double); 163 extern double scalb(double, double); 164 165 #ifndef __cplusplus 166 extern int matherr(struct exception *); 167 #endif 168 169 /* 170 * IEEE Test Vector 171 */ 172 extern double significand(double); 173 174 /* 175 * Functions callable from C, intended to support IEEE arithmetic. 176 */ 177 extern double copysign(double, double); 178 extern int ilogb(double); 179 extern double rint(double); 180 extern double scalbn(double, int); 181 182 /* 183 * BSD math library entry points 184 */ 185 struct complex { double x, y; }; 186 extern double cabs(struct complex); 187 extern double drem(double, double); 188 extern double expm1(double); 189 extern double log1p(double); 190 extern double z_abs(struct complex const *); /* complete non standard */ 191 192 /* 193 * Reentrant version of gamma & lgamma; passes signgam back by reference 194 * as the second argument; user must allocate space for signgam. 195 */ 196 #ifdef _REENTRANT 197 extern double gamma_r(double, int *); 198 extern double lgamma_r(double, int *); 199 #endif /* _REENTRANT */ 200 201 202 /* float versions of ANSI/POSIX functions */ 203 extern float acosf(float); 204 extern float asinf(float); 205 extern float atanf(float); 206 extern float atan2f(float, float); 207 extern float cosf(float); 208 extern float sinf(float); 209 extern float tanf(float); 210 211 extern float coshf(float); 212 extern float sinhf(float); 213 extern float tanhf(float); 214 215 extern float expf(float); 216 extern float frexpf(float, int *); 217 extern float ldexpf(float, int); 218 extern float logf(float); 219 extern float log10f(float); 220 extern float modff(float, float *); 221 222 extern float powf(float, float); 223 extern float sqrtf(float); 224 225 extern float ceilf(float); 226 extern float fabsf(float); 227 extern float floorf(float); 228 extern float fmodf(float, float); 229 230 extern float erff(float); 231 extern float erfcf(float); 232 extern float gammaf(float); 233 extern float hypotf(float, float); 234 extern int isnanf(float); 235 extern int finitef(float); 236 extern float j0f(float); 237 extern float j1f(float); 238 extern float jnf(int, float); 239 extern float lgammaf(float); 240 extern float y0f(float); 241 extern float y1f(float); 242 extern float ynf(int, float); 243 244 extern float acoshf(float); 245 extern float asinhf(float); 246 extern float atanhf(float); 247 extern float cbrtf(float); 248 extern float logbf(float); 249 extern float nextafterf(float, float); 250 extern float remainderf(float, float); 251 extern float scalbf(float, float); 252 253 /* 254 * float version of IEEE Test Vector 255 */ 256 extern float significandf(float); 257 258 /* 259 * Float versions of functions callable from C, intended to support 260 * IEEE arithmetic. 261 */ 262 extern float copysignf(float, float); 263 extern int ilogbf(float); 264 extern float rintf(float); 265 extern float scalbnf(float, int); 266 267 /* 268 * float versions of BSD math library entry points 269 */ 270 extern float cabsf (); 271 extern float dremf(float, float); 272 extern float expm1f(float); 273 extern float log1pf(float); 274 275 /* 276 * Float versions of reentrant version of gamma & lgamma; passes 277 * signgam back by reference as the second argument; user must 278 * allocate space for signgam. 279 */ 280 #ifdef _REENTRANT 281 extern float gammaf_r(float, int *); 282 extern float lgammaf_r(float, int *); 283 #endif /* _REENTRANT */ 284 285 #endif /* !_XOPEN_SOURCE */ 286 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 287 288 #ifdef __cplusplus 289 } /* "C" */ 290 #endif 291 292 #endif /* _MATH_H_ */ 293