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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
* Contributor(s):
* IBM Corp.
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
* ***** END LICENSE BLOCK ***** */
#ifndef _LIBMATH_H
#define _LIBMATH_H
#include <math.h>
#include "jsversion.h"
* Use system provided math routines.
/* The right copysign function is not always named the same thing. */
#if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define js_copysign __builtin_copysign
#elif defined WINCE
#define js_copysign _copysign
#elif defined _WIN32
#if _MSC_VER < 1400
/* Try to work around apparent _copysign bustage in VC7.x. */
#define js_copysign js_copysign
extern double js_copysign(double, double);
#define js_copysign _copysign
#define js_copysign copysign
/* Consistency wrapper for platform deviations in fmod() */
static inline double
js_fmod(double d, double d2)
#ifdef XP_WIN
* Workaround MS fmod bug where 42 % (1/0) => NaN, not 42.
* Workaround MS fmod bug where -0 % -N => 0, not -0.
(d == 0 && JSDOUBLE_IS_FINITE(d2))) {
return d;
return fmod(d, d2);
#endif /* _LIBMATH_H */
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