chgsign.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS system libraries
 * FILE:        lib/crt/??????
 * PURPOSE:     Unknown
 * PROGRAMER:   Unknown
 * UPDATE HISTORY:
 *              25/11/05: Added license header
 */

#include <precomp.h>

#include <internal/ieee.h>

/*
 * @implemented
 */
double _chgsign( double __x )
{
    union
    {
        double* __x;
        double_s *x;
    } u;
    u.__x = &__x;

    if ( u.x->sign == 1 )
        u.x->sign = 0;
    else
        u.x->sign = 1;

    return __x;
}