/* mpq_neg -- negate a rational.

Copyright 2000, 2001, 2012 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */

#define __GMP_FORCE_mpq_neg 1

#include "gmp.h"
#include "gmp-impl.h"


void
mpq_neg (mpq_ptr dst, mpq_srcptr src)
{
  mp_size_t  num_size = SIZ(NUM(src));

  if (src != dst)
    {
      mp_size_t  size;
      mp_ptr dp;

      size = ABS(num_size);
      dp = MPZ_NEWALLOC (NUM(dst), size);
      MPN_COPY (dp, PTR(NUM(src)), size);

      size = SIZ(DEN(src));
      dp = MPZ_NEWALLOC (DEN(dst), size);
      SIZ(DEN(dst)) = size;
      MPN_COPY (dp, PTR(DEN(src)), size);
    }

  SIZ(NUM(dst)) = -num_size;
}