ReactOS  0.4.14-dev-337-gf981a68
isnan.c
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1 /* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
2  This file is part of the GNU C Library.
3 
4  The GNU C Library is free software; you can redistribute it and/or
5  modify it under the terms of the GNU Lesser General Public
6  License as published by the Free Software Foundation; either
7  version 2.1 of the License, or (at your option) any later version.
8 
9  The GNU C Library is distributed in the hope that it will be useful,
10  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  Lesser General Public License for more details.
13 
14  You should have received a copy of the GNU Lesser General Public
15  License along with the GNU C Library; if not, write to the Free
16  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  Boston, MA 02110-1301, USA.
18 */
19 
20 #include <precomp.h>
21 
22 #if defined(_MSC_VER) && defined(_M_ARM)
23 #pragma function(_isnan)
24 #endif /* _MSC_VER */
25 
26 /*
27  * @implemented
28  */
29 int CDECL _isnan(double __x)
30 {
31  union
32  {
33  double* __x;
34  double_s* x;
35  } x;
36  x.__x = &__x;
37  return ( x.x->exponent == 0x7ff && ( x.x->mantissah != 0 || x.x->mantissal != 0 ));
38 }
39 
40 /*
41  * @implemented
42  */
43 int CDECL _finite(double __x)
44 {
45  union
46  {
47  double* __x;
48  double_s* x;
49  } x;
50 
51  x.__x = &__x;
52 
53  return ((x.x->exponent & 0x7ff) != 0x7ff);
54 }
Definition: ieee.h:10
int CDECL _isnan(double __x)
Definition: isnan.c:29
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
#define CDECL
Definition: compat.h:21
int CDECL _finite(double __x)
Definition: isnan.c:43