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a821f8a @dustin Import pristine Tracemonkey from Firefox 3.7a3
dustin authored
1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 *
3 * ***** BEGIN LICENSE BLOCK *****
4 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 1.1 (the "License"); you may not use this file except in compliance with
8 * the License. You may obtain a copy of the License at
9 * http://www.mozilla.org/MPL/
10 *
11 * Software distributed under the License is distributed on an "AS IS" basis,
12 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 * for the specific language governing rights and limitations under the
14 * License.
15 *
16 * The Original Code is Mozilla Communicator client code, released
17 * March 31, 1998.
18 *
19 * The Initial Developer of the Original Code is
20 * Netscape Communications Corporation.
21 * Portions created by the Initial Developer are Copyright (C) 1998
22 * the Initial Developer. All Rights Reserved.
23 *
24 * Contributor(s):
25 * IBM Corp.
26 *
27 * Alternatively, the contents of this file may be used under the terms of
28 * either of the GNU General Public License Version 2 or later (the "GPL"),
29 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 * in which case the provisions of the GPL or the LGPL are applicable instead
31 * of those above. If you wish to allow use of your version of this file only
32 * under the terms of either the GPL or the LGPL, and not to allow others to
33 * use your version of this file under the terms of the MPL, indicate your
34 * decision by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL or the LGPL. If you do not delete
36 * the provisions above, a recipient may use your version of this file under
37 * the terms of any one of the MPL, the GPL or the LGPL.
38 *
39 * ***** END LICENSE BLOCK ***** */
40
41 #ifndef _LIBMATH_H
42 #define _LIBMATH_H
43
44 #include <math.h>
45 #include "jsversion.h"
46
47 /*
48 * Use system provided math routines.
49 */
50
51 /* The right copysign function is not always named the same thing. */
52 #if __GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
53 #define js_copysign __builtin_copysign
54 #elif defined WINCE
55 #define js_copysign _copysign
56 #elif defined _WIN32
57 #if _MSC_VER < 1400
58 /* Try to work around apparent _copysign bustage in VC7.x. */
59 #define js_copysign js_copysign
60 extern double js_copysign(double, double);
61 #else
62 #define js_copysign _copysign
63 #endif
64 #else
65 #define js_copysign copysign
66 #endif
67
68 /* Consistency wrapper for platform deviations in fmod() */
69 static inline double
70 js_fmod(double d, double d2)
71 {
72 #ifdef XP_WIN
73 /*
74 * Workaround MS fmod bug where 42 % (1/0) => NaN, not 42.
75 * Workaround MS fmod bug where -0 % -N => 0, not -0.
76 */
77 if ((JSDOUBLE_IS_FINITE(d) && JSDOUBLE_IS_INFINITE(d2)) ||
78 (d == 0 && JSDOUBLE_IS_FINITE(d2))) {
79 return d;
80 }
81 #endif
82 return fmod(d, d2);
83 }
84
85 #endif /* _LIBMATH_H */
86
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