include/math.h

   1 /*
   2  * Copyright (c) 1985, 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)math.h      8.1 (Berkeley) 6/2/93
  34  * $DragonFly: src/include/math.h,v 1.3 2004/09/13 15:53:29 dillon Exp $
  35  */
  36
  37 #ifndef _MATH_H_
  38 #define _MATH_H_
  39
  40 #if defined(vax) || defined(tahoe)              /* DBL_MAX from float.h */
  41 #define HUGE_VAL        1.701411834604692294E+38
  42 #else
  43 #define HUGE_VAL        1e500                   /* IEEE: positive infinity */
  44 #endif
  45
  46 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
  47 #if defined(vax) || defined(tahoe)
  48 /*
  49  * HUGE for the VAX and Tahoe converts to the largest possible F-float value.
  50  * This implies an understanding of the conversion behavior of atof(3).  It
  51  * was defined to be the largest float so that overflow didn't occur when it
  52  * was assigned to a single precision number.  HUGE_VAL is strongly preferred.
  53  */
  54 #define HUGE    1.701411733192644270E+38
  55 #else
  56 #define HUGE    HUGE_VAL
  57 #endif
  58
  59 #define M_E             2.7182818284590452354   /* e */
  60 #define M_LOG2E         1.4426950408889634074   /* log 2e */
  61 #define M_LOG10E        0.43429448190325182765  /* log 10e */
  62 #define M_LN2           0.69314718055994530942  /* log e2 */
  63 #define M_LN10          2.30258509299404568402  /* log e10 */
  64 #define M_PI            3.14159265358979323846  /* pi */
  65 #define M_PI_2          1.57079632679489661923  /* pi/2 */
  66 #define M_PI_4          0.78539816339744830962  /* pi/4 */
  67 #define M_1_PI          0.31830988618379067154  /* 1/pi */
  68 #define M_2_PI          0.63661977236758134308  /* 2/pi */
  69 #define M_2_SQRTPI      1.12837916709551257390  /* 2/sqrt(pi) */
  70 #define M_SQRT2         1.41421356237309504880  /* sqrt(2) */
  71 #define M_SQRT1_2       0.70710678118654752440  /* 1/sqrt(2) */
  72 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
  73
  74 #include <sys/cdefs.h>
  75
  76 /*
  77  * Most of these functions have the side effect of setting errno, except
  78  * in the (broken) BSD libm, so they not declared as __pure2.
  79  */
  80 __BEGIN_DECLS
  81 double  acos (double);
  82 double  asin (double);
  83 double  atan (double);
  84 double  atan2 (double, double);
  85 double  ceil (double);
  86 double  cos (double);
  87 double  cosh (double);
  88 double  exp (double);
  89 double  fabs (double);
  90 double  floor (double);
  91 double  fmod (double, double);
  92 double  frexp (double, int *);  /* fundamentally !__pure2 */
  93 double  ldexp (double, int);
  94 double  log (double);
  95 double  log10 (double);
  96 double  modf (double, double *);        /* fundamentally !__pure2 */
  97 double  pow (double, double);
  98 double  sin (double);
  99 double  sinh (double);
 100 double  sqrt (double);
 101 double  tan (double);
 102 double  tanh (double);
 103
 104 /*
 105  * These functions are non-ANSI so they can be "right".  The ones that
 106  * don't set errno in [lib]msun are declared as __pure2.
 107  */
 108 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
 109 double  acosh (double);
 110 double  asinh (double);
 111 double  atanh (double);
 112 double  cabs();         /* we can't describe cabs()'s argument properly */
 113 double  cbrt (double) __pure2;
 114 double  copysign (double, double) __pure2;
 115 double  drem (double, double);
 116 double  erf (double);
 117 double  erfc (double) __pure2;
 118 double  expm1 (double) __pure2;
 119 int     finite (double) __pure2;
 120 double  hypot (double, double);
 121 #if defined(vax) || defined(tahoe)
 122 double  infnan (int);
 123 #endif
 124 int     isinf (double) __pure2;
 125 int     isnan (double) __pure2;
 126 double  j0 (double);
 127 double  j1 (double);
 128 double  jn (int, double);
 129 double  lgamma (double);
 130 double  log1p (double) __pure2;
 131 double  logb (double) __pure2;
 132 double  rint (double) __pure2;
 133 double  scalb (double, double);
 134 double  y0 (double);
 135 double  y1 (double);
 136 double  yn (int, double);
 137 #endif
 138
 139 __END_DECLS
 140
 141 #endif /* !_MATH_H_ */