/[jscoverage]/trunk/js/jslibmath.h
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Annotation of /trunk/js/jslibmath.h

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Sun Jan 10 07:23:34 2010 UTC (12 years, 5 months ago) by siliconforks
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1 siliconforks 332 /* -*- 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 siliconforks 399 #define js_copysign __builtin_copysign
54 siliconforks 332 #elif defined WINCE
55 siliconforks 399 #define js_copysign _copysign
56 siliconforks 332 #elif defined _WIN32
57     #if _MSC_VER < 1400
58     /* Try to work around apparent _copysign bustage in VC6 and VC7. */
59 siliconforks 399 #define js_copysign js_copysign
60 siliconforks 332 extern double js_copysign(double, double);
61     #else
62 siliconforks 399 #define js_copysign _copysign
63 siliconforks 332 #endif
64     #else
65 siliconforks 399 #define js_copysign copysign
66 siliconforks 332 #endif
67    
68 siliconforks 507 /* 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 siliconforks 332 #endif /* _LIBMATH_H */
86    

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