bsd/include/math.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 by NeXT Computer, Inc. All rights reserved. */
  23 /*
  24  * ====================================================
  25  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  26  *
  27  * Developed at SunPro, a Sun Microsystems, Inc. business.
  28  * Permission to use, copy, modify, and distribute this
  29  * software is freely granted, provided that this notice
  30  * is preserved.
  31  * ====================================================
  32  */
  33
  34 #ifndef _MATH_H_
  35 #define _MATH_H_
  36
  37 /*
  38  * ANSI/POSIX
  39  */
  40 #define HUGE_VAL        1e500                   /* IEEE: positive infinity */
  41
  42 /*
  43  * XOPEN/SVID
  44  */
  45 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
  46 #define M_E             2.7182818284590452354   /* e */
  47 #define M_LOG2E         1.4426950408889634074   /* log 2e */
  48 #define M_LOG10E        0.43429448190325182765  /* log 10e */
  49 #define M_LN2           0.69314718055994530942  /* log e2 */
  50 #define M_LN10          2.30258509299404568402  /* log e10 */
  51 #define M_PI            3.14159265358979323846  /* pi */
  52 #define M_PI_2          1.57079632679489661923  /* pi/2 */
  53 #define M_PI_4          0.78539816339744830962  /* pi/4 */
  54 #define M_1_PI          0.31830988618379067154  /* 1/pi */
  55 #define M_2_PI          0.63661977236758134308  /* 2/pi */
  56 #define M_2_SQRTPI      1.12837916709551257390  /* 2/sqrt(pi) */
  57 #define M_SQRT2         1.41421356237309504880  /* sqrt(2) */
  58 #define M_SQRT1_2       0.70710678118654752440  /* 1/sqrt(2) */
  59
  60 #define MAXFLOAT        ((float)3.40282346638528860e+38)
  61 extern int signgam;
  62
  63 #if !defined(_XOPEN_SOURCE)
  64 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix};
  65
  66 #define _LIB_VERSION_TYPE enum fdversion
  67 #define _LIB_VERSION _fdlib_version
  68
  69 /* if global variable _LIB_VERSION is not desirable, one may
  70  * change the following to be a constant by:
  71  *      #define _LIB_VERSION_TYPE const enum version
  72  * In that case, after one initializes the value _LIB_VERSION (see
  73  * s_lib_version.c) during compile time, it cannot be modified
  74  * in the middle of a program
  75  */
  76 extern  _LIB_VERSION_TYPE  _LIB_VERSION;
  77
  78 #define _IEEE_  fdlibm_ieee
  79 #define _SVID_  fdlibm_svid
  80 #define _XOPEN_ fdlibm_xopen
  81 #define _POSIX_ fdlibm_posix
  82
  83 #if !defined(__cplusplus)
  84 struct exception {
  85         int type;
  86         char *name;
  87         double arg1;
  88         double arg2;
  89         double retval;
  90 };
  91 #endif
  92
  93 #define HUGE            MAXFLOAT
  94
  95 /*
  96  * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
  97  * (one may replace the following line by "#include <values.h>")
  98  */
  99
 100 #define X_TLOSS         1.41484755040568800000e+16
 101
 102 #define DOMAIN          1
 103 #define SING            2
 104 #define OVERFLOW        3
 105 #define UNDERFLOW       4
 106 #define TLOSS           5
 107 #define PLOSS           6
 108
 109 #endif /* !_XOPEN_SOURCE */
 110 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
 111
 112
 113 #include <sys/cdefs.h>
 114 __BEGIN_DECLS
 115 /*
 116  * ANSI/POSIX
 117  */
 118 extern __pure double acos __P((double));
 119 extern __pure double asin __P((double));
 120 extern __pure double atan __P((double));
 121 extern __pure double atan2 __P((double, double));
 122 extern __pure double cos __P((double));
 123 extern __pure double sin __P((double));
 124 extern __pure double tan __P((double));
 125
 126 extern __pure double cosh __P((double));
 127 extern __pure double sinh __P((double));
 128 extern __pure double tanh __P((double));
 129
 130 extern __pure double exp __P((double));
 131 extern double frexp __P((double, int *));
 132 extern __pure double ldexp __P((double, int));
 133 extern __pure double log __P((double));
 134 extern __pure double log10 __P((double));
 135 extern double modf __P((double, double *));
 136
 137 extern __pure double pow __P((double, double));
 138 extern __pure double sqrt __P((double));
 139
 140 extern __pure double ceil __P((double));
 141 extern __pure double fabs __P((double));
 142 extern __pure double floor __P((double));
 143 extern __pure double fmod __P((double, double));
 144
 145 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
 146 extern __pure double erf __P((double));
 147 extern __pure double erfc __P((double));
 148 extern double gamma __P((double));
 149 extern __pure double hypot __P((double, double));
 150 extern __pure int isinf __P((double));
 151 extern __pure int isnan __P((double));
 152 extern __pure  int finite __P((double));
 153 extern __pure double j0 __P((double));
 154 extern __pure double j1 __P((double));
 155 extern __pure double jn __P((int, double));
 156 extern double lgamma __P((double));
 157 extern __pure double y0 __P((double));
 158 extern __pure double y1 __P((double));
 159 extern __pure double yn __P((int, double));
 160
 161 #if !defined(_XOPEN_SOURCE)
 162 extern __pure double acosh __P((double));
 163 extern __pure double asinh __P((double));
 164 extern __pure double atanh __P((double));
 165 extern __pure double cbrt __P((double));
 166 extern __pure double logb __P((double));
 167 extern __pure double nextafter __P((double, double));
 168 extern __pure double remainder __P((double, double));
 169 extern __pure double scalb __P((double, int));
 170
 171 #ifndef __cplusplus
 172 extern int matherr __P((struct exception *));
 173 #endif
 174
 175 /*
 176  * IEEE Test Vector
 177  */
 178 extern __pure double significand __P((double));
 179
 180 /*
 181  * Functions callable from C, intended to support IEEE arithmetic.
 182  */
 183 extern __pure double copysign __P((double, double));
 184 extern __pure int ilogb __P((double));
 185 extern __pure double rint __P((double));
 186 extern __pure double scalbn __P((double, int));
 187
 188 /*
 189  * BSD math library entry points
 190  */
 191 extern double cabs();
 192 extern __pure double drem __P((double, double));
 193 extern __pure double expm1 __P((double));
 194 extern __pure double log1p __P((double));
 195
 196 /*
 197  * Reentrant version of gamma & lgamma; passes signgam back by reference
 198  * as the second argument; user must allocate space for signgam.
 199  */
 200 #ifdef _REENTRANT
 201 extern double gamma_r __P((double, int *));
 202 extern double lgamma_r __P((double, int *));
 203 #endif /* _REENTRANT */
 204 #endif /* !_XOPEN_SOURCE */
 205 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
 206 __END_DECLS
 207
 208 #endif /* _MATH_H_ */