include/math.h

   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_ */