156 lines
4.3 KiB
C++
156 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SAL_MATHCONF_H
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#define INCLUDED_SAL_MATHCONF_H
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#include <osl/endian.h>
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#include <float.h>
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#if defined SOLARIS
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#include <ieeefp.h>
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#endif /* SOLARIS */
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#if defined(__cplusplus) && ( defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L )
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#include <cmath>
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#endif
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#if defined(IOS)
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#if defined(__cplusplus)
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#include <cmath>
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#else
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#include <math.h>
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#endif
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#endif
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#if defined __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* Generally, the C standard guarantees that at program startup, "trapping or
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stopping (if supported) is disabled on all [floating-point] exceptions"
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(F.7.3/1 of the August 3, 1998 draft of C99), and that during program
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execution, "a programmer can safely assume default modes (or be unaware of
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them)" (7.6/2, footnote 161 of the August 3, 1998 draft of C99). Reportedly,
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on Windows there are printer drivers that switch on exceptions. To avoid
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problems, the SAL_MATH_FPEXCEPTIONS_OFF macro can be used to explicitly
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switch off exceptions (on Windows).
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*/
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#if defined WNT
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#define SAL_MATH_FPEXCEPTIONS_OFF() _control87( _MCW_EM, _MCW_EM )
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#else /* WNT */
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#define SAL_MATH_FPEXCEPTIONS_OFF()
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#endif /* WNT */
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/* SAL_MATH_FINITE(d): test double d on INFINITY, NaN et al. */
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#if !defined SOLARIS && !defined ANDROID \
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&& defined(__cplusplus) \
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&& ( defined(__GXX_EXPERIMENTAL_CXX0X__) \
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|| __cplusplus >= 201103L \
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|| defined(IOS) )
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#define SAL_MATH_FINITE(d) std::isfinite(d)
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#elif defined( IOS )
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#define SAL_MATH_FINITE(d) isfinite(d)
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#elif defined( WNT)
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#define SAL_MATH_FINITE(d) _finite(d)
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#elif defined(ANDROID) || defined LINUX || defined UNX
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#define SAL_MATH_FINITE(d) finite(d)
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#else /* WNT, LINUX, UNX */
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#error "SAL_MATH_FINITE not defined"
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#endif /* WNT, LINUX, UNX */
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/* This needs to be fixed for non--IEEE-754 platforms: */
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#if 1 /* IEEE 754 supported */
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#if defined OSL_BIGENDIAN
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/* IEEE 754 double structures for BigEndian */
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union sal_math_Double
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{
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struct
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{
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unsigned sign : 1;
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unsigned exponent :11;
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unsigned fraction_hi :20;
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unsigned fraction_lo :32;
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} inf_parts;
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struct
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{
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unsigned sign : 1;
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unsigned exponent :11;
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unsigned qnan_bit : 1;
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unsigned bits :19;
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unsigned fraction_lo :32;
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} nan_parts;
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struct
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{
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unsigned msw :32;
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unsigned lsw :32;
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} w32_parts;
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double value;
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};
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#elif defined OSL_LITENDIAN
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/* IEEE 754 double structures for LittleEndian */
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union sal_math_Double
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{
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struct {
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unsigned fraction_lo :32;
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unsigned fraction_hi :20;
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unsigned exponent :11;
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unsigned sign : 1;
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} inf_parts;
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struct {
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unsigned fraction_lo :32;
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unsigned bits :19;
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unsigned qnan_bit : 1;
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unsigned exponent :11;
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unsigned sign : 1;
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} nan_parts;
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struct
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{
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unsigned lsw :32;
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unsigned msw :32;
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} w32_parts;
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double value;
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};
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#else /* OSL_BIGENDIAN, OSL_LITENDIAN */
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#error "neither OSL_BIGENDIAN nor OSL_LITENDIAN"
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#endif /* OSL_BIGENDIAN, OSL_LITENDIAN */
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#else /* IEEE 754 supported */
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#error "don't know how to handle IEEE 754"
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#endif /* IEEE 754 supported */
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#if defined __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* INCLUDED_SAL_MATHCONF_H */
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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