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 * $FreeBSD$ 15 */ 16 17 #ifndef _MATH_H_ 18 #define _MATH_H_ 19 20 /* 21 * ANSI/POSIX 22 */ 23 extern const union __infinity_un { 24 unsigned char __uc[8]; 25 double __ud; 26 } __infinity; 27 #define HUGE_VAL (__infinity.__ud) 28 29 /* 30 * XOPEN/SVID 31 */ 32 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 33 #define M_E 2.7182818284590452354 /* e */ 34 #define M_LOG2E 1.4426950408889634074 /* log 2e */ 35 #define M_LOG10E 0.43429448190325182765 /* log 10e */ 36 #define M_LN2 0.69314718055994530942 /* log e2 */ 37 #define M_LN10 2.30258509299404568402 /* log e10 */ 38 #define M_PI 3.14159265358979323846 /* pi */ 39 #define M_PI_2 1.57079632679489661923 /* pi/2 */ 40 #define M_PI_4 0.78539816339744830962 /* pi/4 */ 41 #define M_1_PI 0.31830988618379067154 /* 1/pi */ 42 #define M_2_PI 0.63661977236758134308 /* 2/pi */ 43 #define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 44 #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 45 #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 46 47 #define MAXFLOAT ((float)3.40282346638528860e+38) 48 extern int signgam; 49 50 #if !defined(_XOPEN_SOURCE) 51 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 52 53 #define _LIB_VERSION_TYPE enum fdversion 54 #define _LIB_VERSION _fdlib_version 55 56 /* if global variable _LIB_VERSION is not desirable, one may 57 * change the following to be a constant by: 58 * #define _LIB_VERSION_TYPE const enum version 59 * In that case, after one initializes the value _LIB_VERSION (see 60 * s_lib_version.c) during compile time, it cannot be modified 61 * in the middle of a program 62 */ 63 extern _LIB_VERSION_TYPE _LIB_VERSION; 64 65 #define _IEEE_ fdlibm_ieee 66 #define _SVID_ fdlibm_svid 67 #define _XOPEN_ fdlibm_xopen 68 #define _POSIX_ fdlibm_posix 69 70 /* We have a problem when using C++ since `exception' is a reserved 71 name in C++. */ 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 #if 0 83 /* Old value from 4.4BSD-Lite math.h; this is probably better. */ 84 #define HUGE HUGE_VAL 85 #else 86 #define HUGE MAXFLOAT 87 #endif 88 89 /* 90 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 91 * (one may replace the following line by "#include <values.h>") 92 */ 93 94 #define X_TLOSS 1.41484755040568800000e+16 95 96 #define DOMAIN 1 97 #define SING 2 98 #define OVERFLOW 3 99 #define UNDERFLOW 4 100 #define TLOSS 5 101 #define PLOSS 6 102 103 #endif /* !_XOPEN_SOURCE */ 104 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 105 106 #include <sys/cdefs.h> 107 108 /* 109 * Most of these functions have the side effect of setting errno, so they 110 * are not declared as __pure2. (XXX: this point needs to be revisited, 111 * since C99 doesn't require the mistake of setting errno, and we mostly 112 * don't set it anyway. In C99, pragmas and functions for changing the 113 * rounding mode affect the purity of these functions.) 114 */ 115 __BEGIN_DECLS 116 /* 117 * ANSI/POSIX 118 */ 119 double acos(double); 120 double asin(double); 121 double atan(double); 122 double atan2(double, double); 123 double cos(double); 124 double sin(double); 125 double tan(double); 126 127 double cosh(double); 128 double sinh(double); 129 double tanh(double); 130 131 double exp(double); 132 double frexp(double, int *); /* fundamentally !__pure2 */ 133 double ldexp(double, int); 134 double log(double); 135 double log10(double); 136 double modf(double, double *); /* fundamentally !__pure2 */ 137 138 double pow(double, double); 139 double sqrt(double); 140 141 double ceil(double); 142 double fabs(double); 143 double floor(double); 144 double fmod(double, double); 145 146 /* 147 * These functions are not in C90 so they can be "right". The ones that 148 * never set errno in lib/msun are declared as __pure2. 149 */ 150 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 151 double erf(double); 152 double erfc(double) __pure2; 153 int finite(double) __pure2; 154 double gamma(double); 155 double hypot(double, double); 156 int isinf(double) __pure2; 157 int isnan(double) __pure2; 158 double j0(double); 159 double j1(double); 160 double jn(int, double); 161 double lgamma(double); 162 double y0(double); 163 double y1(double); 164 double yn(int, double); 165 166 #if !defined(_XOPEN_SOURCE) 167 double acosh(double); 168 double asinh(double); 169 double atanh(double); 170 double cbrt(double) __pure2; 171 double logb(double) __pure2; 172 double nextafter(double, double); 173 double remainder(double, double); 174 double scalb(double, double); 175 double tgamma(double); 176 177 #ifndef __cplusplus 178 int matherr(struct exception *); 179 #endif 180 181 /* 182 * IEEE Test Vector 183 */ 184 double significand(double); 185 186 /* 187 * Functions callable from C, intended to support IEEE arithmetic. 188 */ 189 double copysign(double, double) __pure2; 190 int ilogb(double); 191 double rint(double) __pure2; 192 double scalbn(double, int); 193 194 /* 195 * BSD math library entry points 196 */ 197 double drem(double, double); 198 double expm1(double) __pure2; 199 double log1p(double) __pure2; 200 201 /* 202 * Reentrant version of gamma & lgamma; passes signgam back by reference 203 * as the second argument; user must allocate space for signgam. 204 */ 205 #ifdef _REENTRANT 206 double gamma_r(double, int *); 207 double lgamma_r(double, int *); 208 #endif /* _REENTRANT */ 209 210 /* float versions of ANSI/POSIX functions */ 211 float acosf(float); 212 float asinf(float); 213 float atanf(float); 214 float atan2f(float, float); 215 float cosf(float); 216 float sinf(float); 217 float tanf(float); 218 219 float coshf(float); 220 float sinhf(float); 221 float tanhf(float); 222 223 float expf(float); 224 float frexpf(float, int *); /* fundamentally !__pure2 */ 225 float ldexpf(float, int); 226 float logf(float); 227 float log10f(float); 228 float modff(float, float *); /* fundamentally !__pure2 */ 229 230 float powf(float, float); 231 float sqrtf(float); 232 233 float ceilf(float); 234 float fabsf(float); 235 float floorf(float); 236 float fmodf(float, float); 237 238 float erff(float); 239 float erfcf(float) __pure2; 240 int finitef(float) __pure2; 241 float gammaf(float); 242 float hypotf(float, float) __pure2; 243 int isnanf(float) __pure2; 244 float j0f(float); 245 float j1f(float); 246 float jnf(int, float); 247 float lgammaf(float); 248 float y0f(float); 249 float y1f(float); 250 float ynf(int, float); 251 252 float acoshf(float); 253 float asinhf(float); 254 float atanhf(float); 255 float cbrtf(float) __pure2; 256 float logbf(float) __pure2; 257 float nextafterf(float, float); 258 float remainderf(float, float); 259 float scalbf(float, float); 260 261 /* 262 * float version of IEEE Test Vector 263 */ 264 float significandf(float); 265 266 /* 267 * Float versions of functions callable from C, intended to support 268 * IEEE arithmetic. 269 */ 270 float copysignf(float, float) __pure2; 271 int ilogbf(float); 272 float rintf(float); 273 float scalbnf(float, int); 274 275 /* 276 * float versions of BSD math library entry points 277 */ 278 float dremf(float, float); 279 float expm1f(float) __pure2; 280 float log1pf(float) __pure2; 281 282 /* 283 * Float versions of reentrant version of gamma & lgamma; passes 284 * signgam back by reference as the second argument; user must 285 * allocate space for signgam. 286 */ 287 #ifdef _REENTRANT 288 float gammaf_r(float, int *); 289 float lgammaf_r(float, int *); 290 #endif /* _REENTRANT */ 291 292 #endif /* !_XOPEN_SOURCE */ 293 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 294 __END_DECLS 295 296 #endif /* !_MATH_H_ */ 297