[mirror_ubuntu-artful-kernel.git] / lib / mpi / mpi-cmp.c

/* 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 (u->sign)
		return -cmp;
	return cmp;
}
EXPORT_SYMBOL_GPL(mpi_cmp);
Commit	Line	Data
12f008b6 DH	1	/* mpi-cmp.c - MPI functions
	2	* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
	3	*
	4	* This file is part of GnuPG.
	5	*
	6	* GnuPG is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* GnuPG is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
	19	*/
	20
	21	#include "mpi-internal.h"
	22
	23	int mpi_cmp_ui(MPI u, unsigned long v)
	24	{
	25	mpi_limb_t limb = v;
	26
	27	mpi_normalize(u);
	28	if (!u->nlimbs && !limb)
	29	return 0;
	30	if (u->sign)
	31	return -1;
	32	if (u->nlimbs > 1)
	33	return 1;
	34
	35	if (u->d[0] == limb)
	36	return 0;
	37	else if (u->d[0] > limb)
	38	return 1;
	39	else
	40	return -1;
	41	}
	42	EXPORT_SYMBOL_GPL(mpi_cmp_ui);
	43
	44	int mpi_cmp(MPI u, MPI v)
	45	{
	46	mpi_size_t usize, vsize;
	47	int cmp;
	48
	49	mpi_normalize(u);
	50	mpi_normalize(v);
	51	usize = u->nlimbs;
	52	vsize = v->nlimbs;
	53	if (!u->sign && v->sign)
	54	return 1;
	55	if (u->sign && !v->sign)
	56	return -1;
	57	if (usize != vsize && !u->sign && !v->sign)
	58	return usize - vsize;
	59	if (usize != vsize && u->sign && v->sign)
b9f918a3	60	return vsize - usize;
12f008b6 DH	61	if (!usize)
	62	return 0;
	63	cmp = mpihelp_cmp(u->d, v->d, usize);
7fe21291 RV	64	if (u->sign)
	65	return -cmp;
	66	return cmp;
12f008b6 DH	67	}
12f008b6 DH	68	EXPORT_SYMBOL_GPL(mpi_cmp);