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amiga-clib2/library/include/math.h
Olaf Barthel c3a10b88b5 - Added NAN, INFINITY, FLT_EVAL_METHOD, float_t and double_t to 
<math.h>.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14959 87f5fb63-7c3d-0410-a384-fd976d0f7a62
2005-05-29 10:09:55 +00:00

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8.3 KiB
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/*
* $Id: math.h,v 1.11 2005-05-29 10:09:55 obarthel Exp $
*
* :ts=4
*
* Portable ISO 'C' (1994) runtime library for the Amiga computer
* Copyright (c) 2002-2005 by Olaf Barthel <olsen@sourcery.han.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Neither the name of Olaf Barthel nor the names of contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MATH_H
#define _MATH_H
/****************************************************************************/
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/****************************************************************************/
#ifndef _STDLIB_H
#include <stdlib.h>
#endif /* _STDLIB_H */
/****************************************************************************/
extern double __huge_val;
/****************************************************************************/
#define HUGE_VAL ((const double)__huge_val)
/****************************************************************************/
extern double acos(double x);
extern double asin(double x);
extern double atan(double x);
extern double atan2(double y,double x);
extern double ceil(double x);
extern double cos(double x);
extern double cosh(double x);
extern double exp(double x);
extern double fabs(double x);
extern double floor(double x);
extern double fmod(double x,double y);
extern double frexp(double x,int *nptr);
extern double ldexp(double x,int n);
extern double log(double x);
extern double log10(double x);
extern double modf(double x,double *nptr);
extern double pow(double x,double y);
extern double sin(double x);
extern double sinh(double x);
extern double sqrt(double x);
extern double tan(double x);
extern double tanh(double x);
/****************************************************************************/
/* The following is not part of the ISO 'C' (1994) standard. */
/****************************************************************************/
#define M_E 2.7182818284590452354
#define M_LOG2E 1.4426950408889634074
#define M_LOG10E 0.43429448190325182765
#define M_LN2 0.69314718055994530942
#define M_LN10 2.30258509299404568402
#define M_PI 3.14159265358979323846
#define M_PI_2 1.57079632679489661923
#define M_PI_4 0.78539816339744830962
#define M_1_PI 0.31830988618379067154
#define M_2_PI 0.63661977236758134308
#define M_2_SQRTPI 1.12837916709551257390
#define M_SQRT2 1.41421356237309504880
#define M_SQRT1_2 0.70710678118654752440
/****************************************************************************/
extern double rint(double x);
extern float rintf(float x);
extern double logb(double x);
extern double hypot(double x,double y);
/****************************************************************************/
/* The following is not part of the ISO 'C' (1994) standard, but it should
be part of ISO/IEC 9899:1999, also known as "C99". */
/****************************************************************************/
/* Note that the comparison operations performed on the floating point
data types ought to include float, double and long double. However,
because the current (2005-06-12) compiler technology available on the
Amiga does not support the long double type yet, this library is restricted
to operations on float and double. */
/****************************************************************************/
extern float __huge_val_float;
/****************************************************************************/
#define HUGE_VALF ((const float)__huge_val_float)
/****************************************************************************/
extern float __infinity;
extern float __nan;
/****************************************************************************/
#define INFINITY ((const float)__infinity)
#define NAN ((const float)__nan)
/****************************************************************************/
#define FP_INFINITE 0 /* -/+ infinity */
#define FP_NAN 1 /* not a number */
#define FP_NORMAL 2 /* normalized floating point number */
#define FP_SUBNORMAL 3 /* very small floating point number; special
case of IEEE 754 */
#define FP_ZERO 4 /* exponent/fraction are zero */
/****************************************************************************/
extern int __fpclassify_float(float x);
extern int __fpclassify_double(double x);
extern int __isfinite_float(float x);
extern int __isfinite_double(double x);
extern int __signbit_float(float x);
extern int __signbit_double(double x);
/****************************************************************************/
#define fpclassify(x) \
(sizeof(x) == sizeof(float) ? \
__fpclassify_float(x) : \
__fpclassify_double(x))
#define isfinite(x) \
(sizeof(x) == sizeof(float) ? \
__isfinite_float(x) : \
__isfinite_double(x))
#define isinf(x) \
((sizeof(x) == sizeof(float) ? \
__fpclassify_float(x) : \
__fpclassify_double(x)) \
== FP_INFINITE)
#define isnan(x) \
((sizeof(x) == sizeof(float) ? \
__fpclassify_float(x) : \
__fpclassify_double(x)) \
== FP_NAN)
#define isnormal(x) \
((sizeof(x) == sizeof(float) ? \
__fpclassify_float(x) : \
__fpclassify_double(x)) \
== FP_NORMAL)
#define signbit(x) \
(sizeof(x) == sizeof(float) ? \
__signbit_float(x) : \
__signbit_double(x))
/****************************************************************************/
extern int __isunordered_float(float x,float y);
extern int __isunordered_float_double(float x,double y);
extern int __isunordered_double(double x,double y);
/****************************************************************************/
#define isunordered(x,y) \
(sizeof(x) == sizeof(float) ? \
(sizeof(y) == sizeof(float) ? \
__isunordered_float((x),y) : \
__isunordered_float_double((x),(y))) : \
(sizeof(y) == sizeof(float) ? \
__isunordered_float_double((y),(x)) : \
__isunordered_double((x),(y))))
#define isgreater(x,y) \
(isunordered(x,y) ? 0 : (x) > (y))
#define isgreaterequal(x,y) \
(isunordered(x,y) ? 0 : (x) >= (y))
#define isless(x,y) \
(isunordered(x,y) ? 0 : (x) < (y))
#define islessequal(x,y) \
(isunordered(x,y) ? 0 : (x) <= (y))
#define islessgreater(x,y) \
(isunordered(x,y) ? 0 : (x) < (y) || (x) > (y)) /* ZZZ don't evaluate twice! */
/****************************************************************************/
extern float fabsf(float x);
/****************************************************************************/
extern float nanf(const char *tagp);
extern double nan(const char *tagp);
/****************************************************************************/
extern float nextafterf(float x,float y);
extern double nextafter(double x,double y);
/****************************************************************************/
extern double copysign(double x, double y);
extern float copysignf(float x, float y);
/****************************************************************************/
#define FLT_EVAL_METHOD 0
/****************************************************************************/
typedef float float_t;
typedef double double_t;
/****************************************************************************/
#ifdef __cplusplus
}
#endif /* __cplusplus */
/****************************************************************************/
#endif /* _MATH_H */
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