/* mpi-cmp.c  -  MPI functions
   * Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   *
   * This file is part of GnuPG.
   *
   * GnuPG is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * GnuPG 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
   */
  
  #include "mpi-internal.h"
  
  int mpi_cmp_ui(MPI u, unsigned long v)
  {
  	mpi_limb_t limb = v;
  
  	mpi_normalize(u);
  	if (!u->nlimbs && !limb)
  		return 0;
  	if (u->sign)
  		return -1;
  	if (u->nlimbs > 1)
  		return 1;
  
  	if (u->d[0] == limb)
  		return 0;
  	else if (u->d[0] > limb)
  		return 1;
  	else
  		return -1;
  }
  EXPORT_SYMBOL_GPL(mpi_cmp_ui);
  
  int mpi_cmp(MPI u, MPI v)
  {
  	mpi_size_t usize, vsize;
  	int cmp;
  
  	mpi_normalize(u);
  	mpi_normalize(v);
  	usize = u->nlimbs;
  	vsize = v->nlimbs;
  	if (!u->sign && v->sign)
  		return 1;
  	if (u->sign && !v->sign)
  		return -1;
  	if (usize != vsize && !u->sign && !v->sign)
  		return usize - vsize;
  	if (usize != vsize && u->sign && v->sign)
  		return vsize + usize;
  	if (!usize)
  		return 0;
  	cmp = mpihelp_cmp(u->d, v->d, usize);
  	if (!cmp)
  		return 0;
  	if ((cmp < 0 ? 1 : 0) == (u->sign ? 1 : 0))
  		return 1;
  	return -1;
  }
  EXPORT_SYMBOL_GPL(mpi_cmp);