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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_SAL_MATHCONF_H
#define INCLUDED_SAL_MATHCONF_H
#include "osl/endian.h"
#if defined __sun
#include <ieeefp.h>
#endif /* __sun */
#if defined(__cplusplus) && ( defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L )
#include <cmath>
#endif
#if defined(IOS)
#if defined(__cplusplus)
#include <cmath>
#else
#include <math.h>
#endif
#endif
#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(_WIN32)
#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 __sun && !defined ANDROID \
&& defined(__cplusplus) \
&& ( defined(__GXX_EXPERIMENTAL_CXX0X__) \
|| __cplusplus >= 201103L \
|| defined(IOS) )
#define SAL_MATH_FINITE(d) std::isfinite(d)
#elif defined( IOS )
#define SAL_MATH_FINITE(d) isfinite(d)
#elif defined( WNT)
#define SAL_MATH_FINITE(d) _finite(d)
#elif defined(ANDROID) || 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 */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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