lib/sdk/crt/float/chgsign.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crt/??????
   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  */
  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 }