/* mpz_cdiv_r -- Division rounding the quotient towards +infinity.  The
   remainder gets the opposite sign as the denominator.

Copyright 1994-1996, 2001, 2005, 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 https://www.gnu.org/licenses/.  */

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

void
mpz_cdiv_r (mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor)
{
  mp_size_t divisor_size = SIZ (divisor);
  mpz_t temp_divisor;		/* N.B.: lives until function returns! */
  TMP_DECL;

  TMP_MARK;

  /* We need the original value of the divisor after the remainder has been
     preliminary calculated.  We have to copy it to temporary space if it's
     the same variable as REM.  */
  if (rem == divisor)
    {

      MPZ_TMP_INIT (temp_divisor, ABS (divisor_size));
      mpz_set (temp_divisor, divisor);
      divisor = temp_divisor;
    }

  mpz_tdiv_r (rem, dividend, divisor);

  if ((divisor_size ^ SIZ (dividend)) >= 0 && SIZ (rem) != 0)
    mpz_sub (rem, rem, divisor);

  TMP_FREE;
}