1 /* $OpenBSD: math.h,v 1.5 2001/05/26 01:49:25 millert 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 #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 #include <sys/cdefs.h> 98 __BEGIN_DECLS 99 /* 100 * ANSI/POSIX 101 */ 102 extern double acos __P((double)); 103 extern double asin __P((double)); 104 extern double atan __P((double)); 105 extern double atan2 __P((double, double)); 106 extern double cos __P((double)); 107 extern double sin __P((double)); 108 extern double tan __P((double)); 109 110 extern double cosh __P((double)); 111 extern double sinh __P((double)); 112 extern double tanh __P((double)); 113 114 extern double exp __P((double)); 115 extern double frexp __P((double, int *)); 116 extern double ldexp __P((double, int)); 117 extern double log __P((double)); 118 extern double log10 __P((double)); 119 extern double modf __P((double, double *)); 120 121 extern double pow __P((double, double)); 122 extern double sqrt __P((double)); 123 124 extern double ceil __P((double)); 125 extern double fabs __P((double)); 126 extern double floor __P((double)); 127 extern double fmod __P((double, double)); 128 129 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 130 extern double erf __P((double)); 131 extern double erfc __P((double)); 132 extern double gamma __P((double)); 133 extern double hypot __P((double, double)); 134 extern int isinf __P((double)); 135 extern int isnan __P((double)); 136 extern int finite __P((double)); 137 extern double j0 __P((double)); 138 extern double j1 __P((double)); 139 extern double jn __P((int, double)); 140 extern double lgamma __P((double)); 141 extern double y0 __P((double)); 142 extern double y1 __P((double)); 143 extern double yn __P((int, double)); 144 145 #if !defined(_XOPEN_SOURCE) 146 extern double acosh __P((double)); 147 extern double asinh __P((double)); 148 extern double atanh __P((double)); 149 extern double cbrt __P((double)); 150 extern double logb __P((double)); 151 extern double nextafter __P((double, double)); 152 extern double remainder __P((double, double)); 153 extern double scalb __P((double, double)); 154 155 #ifdef __LIBM_PRIVATE 156 extern int matherr __P((struct exception *)); 157 #endif 158 159 /* 160 * IEEE Test Vector 161 */ 162 extern double significand __P((double)); 163 164 /* 165 * Functions callable from C, intended to support IEEE arithmetic. 166 */ 167 extern double copysign __P((double, double)); 168 extern int ilogb __P((double)); 169 extern double rint __P((double)); 170 extern double scalbn __P((double, int)); 171 172 /* 173 * BSD math library entry points 174 */ 175 extern double cabs(); 176 extern double drem __P((double, double)); 177 extern double expm1 __P((double)); 178 extern double log1p __P((double)); 179 180 /* 181 * Reentrant version of gamma & lgamma; passes signgam back by reference 182 * as the second argument; user must allocate space for signgam. 183 */ 184 #ifdef _REENTRANT 185 extern double gamma_r __P((double, int *)); 186 extern double lgamma_r __P((double, int *)); 187 #endif /* _REENTRANT */ 188 189 190 /* float versions of ANSI/POSIX functions */ 191 extern float acosf __P((float)); 192 extern float asinf __P((float)); 193 extern float atanf __P((float)); 194 extern float atan2f __P((float, float)); 195 extern float cosf __P((float)); 196 extern float sinf __P((float)); 197 extern float tanf __P((float)); 198 199 extern float coshf __P((float)); 200 extern float sinhf __P((float)); 201 extern float tanhf __P((float)); 202 203 extern float expf __P((float)); 204 extern float frexpf __P((float, int *)); 205 extern float ldexpf __P((float, int)); 206 extern float logf __P((float)); 207 extern float log10f __P((float)); 208 extern float modff __P((float, float *)); 209 210 extern float powf __P((float, float)); 211 extern float sqrtf __P((float)); 212 213 extern float ceilf __P((float)); 214 extern float fabsf __P((float)); 215 extern float floorf __P((float)); 216 extern float fmodf __P((float, float)); 217 218 extern float erff __P((float)); 219 extern float erfcf __P((float)); 220 extern float gammaf __P((float)); 221 extern float hypotf __P((float, float)); 222 extern int isinff __P((float)); 223 extern int isnanf __P((float)); 224 extern int finitef __P((float)); 225 extern float j0f __P((float)); 226 extern float j1f __P((float)); 227 extern float jnf __P((int, float)); 228 extern float lgammaf __P((float)); 229 extern float y0f __P((float)); 230 extern float y1f __P((float)); 231 extern float ynf __P((int, float)); 232 233 extern float acoshf __P((float)); 234 extern float asinhf __P((float)); 235 extern float atanhf __P((float)); 236 extern float cbrtf __P((float)); 237 extern float logbf __P((float)); 238 extern float nextafterf __P((float, float)); 239 extern float remainderf __P((float, float)); 240 extern float scalbf __P((float, float)); 241 242 /* 243 * float version of IEEE Test Vector 244 */ 245 extern float significandf __P((float)); 246 247 /* 248 * Float versions of functions callable from C, intended to support 249 * IEEE arithmetic. 250 */ 251 extern float copysignf __P((float, float)); 252 extern int ilogbf __P((float)); 253 extern float rintf __P((float)); 254 extern float scalbnf __P((float, int)); 255 256 /* 257 * float versions of BSD math library entry points 258 */ 259 extern float cabsf (); 260 extern float dremf __P((float, float)); 261 extern float expm1f __P((float)); 262 extern float log1pf __P((float)); 263 264 /* 265 * Float versions of reentrant version of gamma & lgamma; passes 266 * signgam back by reference as the second argument; user must 267 * allocate space for signgam. 268 */ 269 #ifdef _REENTRANT 270 extern float gammaf_r __P((float, int *)); 271 extern float lgammaf_r __P((float, int *)); 272 #endif /* _REENTRANT */ 273 274 #endif /* !_XOPEN_SOURCE */ 275 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 276 __END_DECLS 277 278 #endif /* _MATH_H_ */ 279