168 lines
4.9 KiB
C
168 lines
4.9 KiB
C
/* Declarations for math functions.
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Copyright (C) 1991, 92, 93, 95, 96 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI Standard: 4.5 MATHEMATICS <math.h>
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*/
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#ifndef _MATH_H
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#define _MATH_H 1
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#include <features.h>
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__BEGIN_DECLS
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#define __need_Emath
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#include <errno.h>
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/* Get machine-dependent HUGE_VAL value (returned on overflow).
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On all IEEE754 machines, this is +Infinity. */
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#include <huge_val.h>
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/* Get machine-dependent NAN value (returned for some domain errors). */
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#ifdef __USE_GNU
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#include <nan.h>
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#endif
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/* The file <mathcalls.h> contains the prototypes for all the actual
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math functions. These macros are used for those prototypes, so
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we can easily declare each function as both `name' and `__name',
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and can declare the float versions `namef' and `__namef'. */
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#define __MATHCALL(function,suffix, args) \
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__MATHDECL (_Mdouble_, function,suffix, args)
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#define __MATHDECL(type, function,suffix, args) \
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__MATHDECL_1(type, function,suffix, args); \
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__MATHDECL_1(type, __##function,suffix, args)
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#define __MATHDECL_1(type, function,suffix, args) \
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extern type __MATH_PRECNAME(function,suffix) args
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#define _Mdouble_ double
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#define __MATH_PRECNAME(name,r) name##r
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#include <mathcalls.h>
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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#ifdef __USE_MISC
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/* Include the file of declarations again, this type using `float'
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instead of `double' and appending f to each function name. */
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#define _Mdouble_ float
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#define __MATH_PRECNAME(name,r) name##f##r
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#include <mathcalls.h>
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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/* Include the file of declarations again, this type using `long double'
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instead of `double' and appending l to each function name. */
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#define _Mdouble_ long double
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#define __MATH_PRECNAME(name,r) name##l##r
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#include <mathcalls.h>
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#undef _Mdouble_
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#undef __MATH_PRECNAME
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#endif /* Use misc. */
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#ifdef __USE_MISC
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/* Support for various different standard error handling behaviors. */
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typedef enum { _IEEE_ = -1, _SVID_, _XOPEN_, _POSIX_ } _LIB_VERSION_TYPE;
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/* This variable can be changed at run-time to any of the values above to
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affect floating point error handling behavior (it may also be necessary
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to change the hardware FPU exception settings). */
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extern _LIB_VERSION_TYPE _LIB_VERSION;
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#endif
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#ifdef __USE_SVID
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/* In SVID error handling, `matherr' is called with this description
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of the exceptional condition. */
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struct exception
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{
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int type;
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char *name;
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double arg1;
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double arg2;
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double retval;
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};
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extern int matherr __P ((struct exception *));
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#define X_TLOSS 1.41484755040568800000e+16
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/* Types of exceptions in the `type' field. */
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#define DOMAIN 1
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#define SING 2
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#define OVERFLOW 3
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#define UNDERFLOW 4
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#define TLOSS 5
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#define PLOSS 6
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/* SVID mode specifies returning this large value instead of infinity. */
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#define HUGE FLT_MAX
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#include <float.h> /* Defines FLT_MAX. */
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#endif
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#ifdef __USE_BSD
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/* Some useful constants. */
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#define M_E _Mldbl(2.7182818284590452354) /* e */
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#define M_LOG2E _Mldbl(1.4426950408889634074) /* log 2e */
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#define M_LOG10E _Mldbl(0.43429448190325182765) /* log 10e */
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#define M_LN2 _Mldbl(0.69314718055994530942) /* log e2 */
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#define M_LN10 _Mldbl(2.30258509299404568402) /* log e10 */
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#define M_PI _Mldbl(3.14159265358979323846) /* pi */
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#define M_PI_2 _Mldbl(1.57079632679489661923) /* pi/2 */
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#define M_PI_4 _Mldbl(0.78539816339744830962) /* pi/4 */
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#define M_1_PI _Mldbl(0.31830988618379067154) /* 1/pi */
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#define M_2_PI _Mldbl(0.63661977236758134308) /* 2/pi */
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#define M_2_SQRTPI _Mldbl(1.12837916709551257390) /* 2/sqrt(pi) */
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#define M_SQRT2 _Mldbl(1.41421356237309504880) /* sqrt(2) */
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#define M_SQRT1_2 _Mldbl(0.70710678118654752440) /* 1/sqrt(2) */
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/* Our constants might specify more precision than `double' can represent.
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Use `long double' constants in standard and GNU C, where they are
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supported and the cast to `double'. */
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#if __STDC__ - 0 || __GNUC__ - 0
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#define _Mldbl(x) x##L
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#else /* Traditional C. */
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#define _Mldbl(x) x
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#endif /* Standard or GNU C. */
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#endif
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/* Get machine-dependent inline versions (if there are any). */
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#if defined (__NO_MATH_INLINES) || defined (__OPTIMIZE__)
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#include <__math.h>
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#endif
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__END_DECLS
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#endif /* math.h */
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