xref: /reactos/sdk/lib/crt/float/chgsign.c (revision c2c66aff) 
1 /*
2  * COPYRIGHT:   See COPYING in the top level directory
3  * PROJECT:     ReactOS system libraries
4  * FILE:        lib/sdk/crt/float/chgsign.c
5  * PURPOSE:     Unknown
6  * PROGRAMER:   Unknown
7  * UPDATE HISTORY:
8  *              25/11/05: Added license header
9  */
10 
11 #include <precomp.h>
12 
13 #include <internal/ieee.h>
14 
15 /*
16  * @implemented
17  */
_chgsign(double __x)18 double _chgsign( double __x )
19 {
20 	union
21 	{
22 	    double* __x;
23 	    double_s *x;
24 	} u;
25 	u.__x = &__x;
26 
27 	if ( u.x->sign == 1 )
28 		u.x->sign = 0;
29 	else
30 		u.x->sign = 1;
31 
32 	return __x;
33 }
34