math.h revision 1.27
1 /* $NetBSD: math.h,v 1.27 2003/10/25 22:35:46 kleink Exp $ */ 2 3 /* 4 * ==================================================== 5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6 * 7 * Developed at SunPro, a Sun Microsystems, Inc. business. 8 * Permission to use, copy, modify, and distribute this 9 * software is freely granted, provided that this notice 10 * is preserved. 11 * ==================================================== 12 */ 13 14 /* 15 * @(#)fdlibm.h 5.1 93/09/24 16 */ 17 18 #ifndef _MATH_H_ 19 #define _MATH_H_ 20 21 #include <sys/cdefs.h> 22 #include <sys/featuretest.h> 23 24 union __float_u { 25 unsigned char __dummy[sizeof(float)]; 26 float __val; 27 }; 28 29 union __double_u { 30 unsigned char __dummy[sizeof(double)]; 31 double __val; 32 }; 33 34 union __long_double_u { 35 unsigned char __dummy[sizeof(long double)]; 36 long double __val; 37 }; 38 39 #include <machine/math.h> /* may use __float_u, __double_u, 40 or __long_double_u */ 41 42 /* 43 * ANSI/POSIX 44 */ 45 extern __const union __double_u __infinity; 46 #define HUGE_VAL __infinity.__val 47 48 /* 49 * ISO C99 50 */ 51 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE) && \ 52 !defined(_XOPEN_SOURCE) || \ 53 ((__STDC_VERSION__ - 0) >= 199901L) || \ 54 ((_POSIX_C_SOURCE - 0) >= 200112L) || \ 55 ((_XOPEN_SOURCE - 0) >= 600) || \ 56 defined(_ISOC99_SOURCE) || defined(_NETBSD_SOURCE) 57 extern __const union __float_u __infinityf; 58 #define HUGE_VALF __infinityf.__val 59 60 extern __const union __long_double_u __infinityl; 61 #define HUGE_VALL __infinityl.__val 62 63 #ifdef __HAVE_NANF 64 extern __const union __float_u __nanf; 65 #define NAN __nanf.__val 66 #endif /* __HAVE_NANF */ 67 #endif /* !_ANSI_SOURCE && ... */ 68 69 /* 70 * XOPEN/SVID 71 */ 72 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 73 #define M_E 2.7182818284590452354 /* e */ 74 #define M_LOG2E 1.4426950408889634074 /* log 2e */ 75 #define M_LOG10E 0.43429448190325182765 /* log 10e */ 76 #define M_LN2 0.69314718055994530942 /* log e2 */ 77 #define M_LN10 2.30258509299404568402 /* log e10 */ 78 #define M_PI 3.14159265358979323846 /* pi */ 79 #define M_PI_2 1.57079632679489661923 /* pi/2 */ 80 #define M_PI_4 0.78539816339744830962 /* pi/4 */ 81 #define M_1_PI 0.31830988618379067154 /* 1/pi */ 82 #define M_2_PI 0.63661977236758134308 /* 2/pi */ 83 #define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 84 #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 85 #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 86 87 #define MAXFLOAT ((float)3.40282346638528860e+38) 88 extern int signgam; 89 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ 90 91 #if defined(_NETBSD_SOURCE) 92 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 93 94 #define _LIB_VERSION_TYPE enum fdversion 95 #define _LIB_VERSION _fdlib_version 96 97 /* if global variable _LIB_VERSION is not desirable, one may 98 * change the following to be a constant by: 99 * #define _LIB_VERSION_TYPE const enum version 100 * In that case, after one initializes the value _LIB_VERSION (see 101 * s_lib_version.c) during compile time, it cannot be modified 102 * in the middle of a program 103 */ 104 extern _LIB_VERSION_TYPE _LIB_VERSION; 105 106 #define _IEEE_ fdlibm_ieee 107 #define _SVID_ fdlibm_svid 108 #define _XOPEN_ fdlibm_xopen 109 #define _POSIX_ fdlibm_posix 110 111 #ifndef __cplusplus 112 struct exception { 113 int type; 114 char *name; 115 double arg1; 116 double arg2; 117 double retval; 118 }; 119 #endif 120 121 #define HUGE MAXFLOAT 122 123 /* 124 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 125 * (one may replace the following line by "#include <values.h>") 126 */ 127 128 #define X_TLOSS 1.41484755040568800000e+16 129 130 #define DOMAIN 1 131 #define SING 2 132 #define OVERFLOW 3 133 #define UNDERFLOW 4 134 #define TLOSS 5 135 #define PLOSS 6 136 137 #endif /* _NETBSD_SOURCE */ 138 139 __BEGIN_DECLS 140 /* 141 * ANSI/POSIX 142 */ 143 double acos __P((double)); 144 double asin __P((double)); 145 double atan __P((double)); 146 double atan2 __P((double, double)); 147 double cos __P((double)); 148 double sin __P((double)); 149 double tan __P((double)); 150 151 double cosh __P((double)); 152 double sinh __P((double)); 153 double tanh __P((double)); 154 155 double exp __P((double)); 156 double frexp __P((double, int *)); 157 double ldexp __P((double, int)); 158 double log __P((double)); 159 double log10 __P((double)); 160 double modf __P((double, double *)); 161 162 double pow __P((double, double)); 163 double sqrt __P((double)); 164 165 double ceil __P((double)); 166 double fabs __P((double)); 167 double floor __P((double)); 168 double fmod __P((double, double)); 169 170 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 171 double erf __P((double)); 172 double erfc __P((double)); 173 double gamma __P((double)); 174 double hypot __P((double, double)); 175 int isnan __P((double)); 176 #if defined(_LIBC) 177 int isnanl __P((long double)); 178 #endif 179 int finite __P((double)); 180 double j0 __P((double)); 181 double j1 __P((double)); 182 double jn __P((int, double)); 183 double lgamma __P((double)); 184 double y0 __P((double)); 185 double y1 __P((double)); 186 double yn __P((int, double)); 187 188 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 189 double acosh __P((double)); 190 double asinh __P((double)); 191 double atanh __P((double)); 192 double cbrt __P((double)); 193 double expm1 __P((double)); 194 int ilogb __P((double)); 195 double log1p __P((double)); 196 double logb __P((double)); 197 double nextafter __P((double, double)); 198 double remainder __P((double, double)); 199 double rint __P((double)); 200 double scalb __P((double, double)); 201 #endif /* (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)*/ 202 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ 203 204 #if defined(_NETBSD_SOURCE) 205 #ifndef __cplusplus 206 int matherr __P((struct exception *)); 207 #endif 208 209 /* 210 * IEEE Test Vector 211 */ 212 double significand __P((double)); 213 214 /* 215 * Functions callable from C, intended to support IEEE arithmetic. 216 */ 217 double copysign __P((double, double)); 218 double scalbn __P((double, int)); 219 220 /* 221 * BSD math library entry points 222 */ 223 #ifndef __MATH_PRIVATE__ 224 double cabs __P((/* struct complex { double r; double i; } */)); 225 #endif 226 double drem __P((double, double)); 227 228 #endif /* _NETBSD_SOURCE */ 229 230 #if defined(_NETBSD_SOURCE) || defined(_REENTRANT) 231 /* 232 * Reentrant version of gamma & lgamma; passes signgam back by reference 233 * as the second argument; user must allocate space for signgam. 234 */ 235 double gamma_r __P((double, int *)); 236 double lgamma_r __P((double, int *)); 237 #endif /* _NETBSD_SOURCE || _REENTRANT */ 238 239 240 #if defined(_NETBSD_SOURCE) 241 int isinf __P((double)); 242 #if defined(_LIBC) 243 int isinfl __P((long double)); 244 #endif 245 246 /* float versions of ANSI/POSIX functions */ 247 float acosf __P((float)); 248 float asinf __P((float)); 249 float atanf __P((float)); 250 float atan2f __P((float, float)); 251 float cosf __P((float)); 252 float sinf __P((float)); 253 float tanf __P((float)); 254 255 float coshf __P((float)); 256 float sinhf __P((float)); 257 float tanhf __P((float)); 258 259 float expf __P((float)); 260 float frexpf __P((float, int *)); 261 float ldexpf __P((float, int)); 262 float logf __P((float)); 263 float log10f __P((float)); 264 float modff __P((float, float *)); 265 266 float powf __P((float, float)); 267 float sqrtf __P((float)); 268 269 float ceilf __P((float)); 270 float fabsf __P((float)); 271 float floorf __P((float)); 272 float fmodf __P((float, float)); 273 274 float erff __P((float)); 275 float erfcf __P((float)); 276 float gammaf __P((float)); 277 float hypotf __P((float, float)); 278 int isinff __P((float)); 279 int isnanf __P((float)); 280 int finitef __P((float)); 281 float j0f __P((float)); 282 float j1f __P((float)); 283 float jnf __P((int, float)); 284 float lgammaf __P((float)); 285 float y0f __P((float)); 286 float y1f __P((float)); 287 float ynf __P((int, float)); 288 289 float acoshf __P((float)); 290 float asinhf __P((float)); 291 float atanhf __P((float)); 292 float cbrtf __P((float)); 293 float logbf __P((float)); 294 float nextafterf __P((float, float)); 295 float remainderf __P((float, float)); 296 float scalbf __P((float, float)); 297 298 /* 299 * float version of IEEE Test Vector 300 */ 301 float significandf __P((float)); 302 303 /* 304 * Float versions of functions callable from C, intended to support 305 * IEEE arithmetic. 306 */ 307 float copysignf __P((float, float)); 308 int ilogbf __P((float)); 309 float rintf __P((float)); 310 float scalbnf __P((float, int)); 311 312 /* 313 * float versions of BSD math library entry points 314 */ 315 #ifndef __MATH_PRIVATE__ 316 float cabsf __P((/* struct complex { float r; float i; } */)); 317 #endif 318 float dremf __P((float, float)); 319 float expm1f __P((float)); 320 float log1pf __P((float)); 321 #endif /* _NETBSD_SOURCE */ 322 323 #if defined(_NETBSD_SOURCE) || defined(_REENTRANT) 324 /* 325 * Float versions of reentrant version of gamma & lgamma; passes 326 * signgam back by reference as the second argument; user must 327 * allocate space for signgam. 328 */ 329 float gammaf_r __P((float, int *)); 330 float lgammaf_r __P((float, int *)); 331 #endif /* !... || _REENTRANT */ 332 333 __END_DECLS 334 335 #endif /* _MATH_H_ */ 336
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