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 #define MAXFLOAT ((float)3.40282346638528860e+38) 45 extern int signgam; 46 47 #if !defined(_XOPEN_SOURCE) 48 enum 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 */ 60 extern _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 #ifndef __cplusplus 68 struct 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 #ifdef __cplusplus 98 extern "C" 99 { 100 #endif 101 102 /* 103 * ANSI/POSIX 104 */ 105 extern double acos(double); 106 extern double asin(double); 107 extern double atan(double); 108 extern double atan2(double, double); 109 extern double cos(double); 110 extern double sin(double); 111 extern double tan(double); 112 113 extern double cosh(double); 114 extern double sinh(double); 115 extern double tanh(double); 116 117 extern double exp(double); 118 extern double frexp(double, int *); 119 extern double ldexp(double, int); 120 extern double log(double); 121 extern double log10(double); 122 extern double modf(double, double *); 123 124 extern double pow(double, double); 125 extern double sqrt(double); 126 127 extern double ceil(double); 128 extern double fabs(double); 129 extern double floor(double); 130 extern double fmod(double, double); 131 132 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 133 extern double erf(double); 134 extern double erfc(double); 135 extern double gamma(double); 136 extern double hypot(double, double); 137 extern int isinf(double); 138 extern int isnan(double); 139 extern int finite(double); 140 extern double j0(double); 141 extern double j1(double); 142 extern double jn(int, double); 143 extern double lgamma(double); 144 extern double y0(double); 145 extern double y1(double); 146 extern double yn(int, double); 147 148 #if !defined(_XOPEN_SOURCE) 149 extern double acosh(double); 150 extern double asinh(double); 151 extern double atanh(double); 152 extern double cbrt(double); 153 extern double logb(double); 154 extern double nextafter(double, double); 155 extern double remainder(double, double); 156 extern double scalb(double, double); 157 158 #ifndef __cplusplus 159 extern int matherr(struct exception *); 160 #endif 161 162 /* 163 * IEEE Test Vector 164 */ 165 extern double significand(double); 166 167 /* 168 * Functions callable from C, intended to support IEEE arithmetic. 169 */ 170 extern double copysign(double, double); 171 extern int ilogb(double); 172 extern double rint(double); 173 extern double scalbn(double, int); 174 175 /* 176 * BSD math library entry points 177 */ 178 struct complex { double x, y; }; 179 extern double cabs(struct complex); 180 extern double drem(double, double); 181 extern double expm1(double); 182 extern double log1p(double); 183 extern double z_abs(struct complex const *); /* complete non standard */ 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 isnanf(float); 228 extern int finitef(float); 229 extern float j0f(float); 230 extern float j1f(float); 231 extern float jnf(int, float); 232 extern float lgammaf(float); 233 extern float y0f(float); 234 extern float y1f(float); 235 extern float ynf(int, float); 236 237 extern float acoshf(float); 238 extern float asinhf(float); 239 extern float atanhf(float); 240 extern float cbrtf(float); 241 extern float logbf(float); 242 extern float nextafterf(float, float); 243 extern float remainderf(float, float); 244 extern float scalbf(float, float); 245 246 /* 247 * float version of IEEE Test Vector 248 */ 249 extern float significandf(float); 250 251 /* 252 * Float versions of functions callable from C, intended to support 253 * IEEE arithmetic. 254 */ 255 extern float copysignf(float, float); 256 extern int ilogbf(float); 257 extern float rintf(float); 258 extern float scalbnf(float, int); 259 260 /* 261 * float versions of BSD math library entry points 262 */ 263 extern float cabsf (); 264 extern float dremf(float, float); 265 extern float expm1f(float); 266 extern float log1pf(float); 267 268 /* 269 * Float versions of reentrant version of gamma & lgamma; passes 270 * signgam back by reference as the second argument; user must 271 * allocate space for signgam. 272 */ 273 #ifdef _REENTRANT 274 extern float gammaf_r(float, int *); 275 extern float lgammaf_r(float, int *); 276 #endif /* _REENTRANT */ 277 278 #endif /* !_XOPEN_SOURCE */ 279 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 280 281 #ifdef __cplusplus 282 } /* "C" */ 283 #endif 284 285 #endif /* _MATH_H_ */ 286