/* mpz_cmp_ui.c -- Compare a mpz_t a with an mp_limb_t b.  Return positive,
  zero, or negative based on if a > b, a == b, or a < b.

Copyright (C) 1991, 1993, 1994, 1995 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 Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.

You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */

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

/* gmp.h defines a macro for mpz_cmp_ui.  */
#undef mpz_cmp_ui

int
#if __STDC__
mpz_cmp_ui (mpz_srcptr u, unsigned long int v_digit)
#else
mpz_cmp_ui (u, v_digit)
     mpz_srcptr u;
     unsigned long int v_digit;
#endif
{
  mp_size_t usize = u->_mp_size;

  if (usize == 0)
    return -(v_digit != 0);

  if (usize == 1)
    {
      mp_limb_t u_digit;

      u_digit = u->_mp_d[0];
      if (u_digit > v_digit)
	return 1;
      if (u_digit < v_digit)
	return -1;
      return 0;
    }

  return (usize > 0) ? 1 : -1;
}