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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: mathconf.h,v $
* $Revision: 1.6 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#if !defined INCLUDED_SAL_MATHCONF_H
#define INCLUDED_SAL_MATHCONF_H
#include "osl/endian.h"
#include <float.h>
#if defined SOLARIS
#include <ieeefp.h>
#endif /* SOLARIS */
#if defined __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Generally, the C standard guarantees that at program startup, "trapping or
stopping (if supported) is disabled on all [floating-point] exceptions"
(F.7.3/1 of the August 3, 1998 draft of C99), and that during program
execution, "a programmer can safely assume default modes (or be unaware of
them)" (7.6/2, footnote 161 of the August 3, 1998 draft of C99). Reportedly,
on Windows there are printer drivers that switch on exceptions. To avoid
problems, the SAL_MATH_FPEXCEPTIONS_OFF macro can be used to explicitly
switch off exceptions (on Windows).
*/
#if defined WNT
#define SAL_MATH_FPEXCEPTIONS_OFF() _control87( _MCW_EM, _MCW_EM )
#else /* WNT */
#define SAL_MATH_FPEXCEPTIONS_OFF()
#endif /* WNT */
/* SAL_MATH_FINITE(d): test double d on INFINITY, NaN et al. */
#if defined( WNT)
#define SAL_MATH_FINITE(d) _finite(d)
#elif defined OS2
#define SAL_MATH_FINITE(x) \
((sizeof (x) == sizeof (float)) ? __isfinitef(x) \
: (sizeof (x) == sizeof (double)) ? __isfinite(x) \
: __isfinitel(x))
#elif defined LINUX || defined UNX
#define SAL_MATH_FINITE(d) finite(d)
#else /* WNT, LINUX, UNX */
#error "SAL_MATH_FINITE not defined"
#endif /* WNT, LINUX, UNX */
/* This needs to be fixed for non--IEEE-754 platforms: */
#if 1 /* IEEE 754 supported */
#if defined OSL_BIGENDIAN
/* IEEE 754 double structures for BigEndian */
union sal_math_Double
{
struct
{
unsigned sign : 1;
unsigned exponent :11;
unsigned fraction_hi :20;
unsigned fraction_lo :32;
} inf_parts;
struct
{
unsigned sign : 1;
unsigned exponent :11;
unsigned qnan_bit : 1;
unsigned bits :19;
unsigned fraction_lo :32;
} nan_parts;
struct
{
unsigned msw :32;
unsigned lsw :32;
} w32_parts;
double value;
};
#elif defined OSL_LITENDIAN
/* IEEE 754 double structures for LittleEndian */
union sal_math_Double
{
struct {
unsigned fraction_lo :32;
unsigned fraction_hi :20;
unsigned exponent :11;
unsigned sign : 1;
} inf_parts;
struct {
unsigned fraction_lo :32;
unsigned bits :19;
unsigned qnan_bit : 1;
unsigned exponent :11;
unsigned sign : 1;
} nan_parts;
struct
{
unsigned lsw :32;
unsigned msw :32;
} w32_parts;
double value;
};
#else /* OSL_BIGENDIAN, OSL_LITENDIAN */
#error "neither OSL_BIGENDIAN nor OSL_LITENDIAN"
#endif /* OSL_BIGENDIAN, OSL_LITENDIAN */
#else /* IEEE 754 supported */
#error "don't know how to handle IEEE 754"
#endif /* IEEE 754 supported */
#if defined __cplusplus
}
#endif /* __cplusplus */
#endif /* INCLUDED_SAL_MATHCONF_H */
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