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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: */