/* mpi-cmp.c  -  MPI functions
 * Modified by No Such Labs. (C) 2015. See README.
 *
 * This file was originally part of Gnu Privacy Guard (GPG), ver. 1.4.10,
 * SHA256(gnupg-1.4.10.tar.gz):
 *        0bfd74660a2f6cedcf7d8256db4a63c996ffebbcdc2cf54397bfb72878c5a85a
 * (C) 1994-2005 Free Software Foundation, Inc.
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>

#include "knobs.h"
#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;
}

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;
    if( !(cmp=mpihelp_cmp( u->d, v->d, usize )) )
	return 0;
    if( (cmp < 0?1:0) == (u->sign?1:0))
	return 1;
    return -1;
}