/*

 * Copyright (C) 2000-2012 Free Software Foundation, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS 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 2.1 of

 * the License, or (at your option) any later version.

 *

 * This 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 this program.  If not, see <http://www.gnu.org/licenses/>

 *

 */

/* This file contains the functions needed for 64 bit integer support in

 * TLS, and functions which ease the access to TLS vectors (data of given size).

 */

#include "gnutls_int.h"

#include <num.h>

#include "errors.h"

/* This function will add one to uint64 x.

 * Returns 0 on success, or -1 if the uint64 max limit

 * has been reached.

 */

int _gnutls_uint64pp(gnutls_uint64 * x)

{

	register int i, y = 0;

	for (i = 7; i >= 0; i--) {

		y = 0;

		if (x->i[i] == 0xff) {

			x->i[i] = 0;

			y = 1;

		} else

			x->i[i]++;

		if (y == 0)

			break;

	}

	if (y != 0)

		return -1;	/* over 64 bits! WOW */

	return 0;

}

/* This function will add one to uint48 x.

 * Returns 0 on success, or -1 if the uint48 max limit

 * has been reached.

 */

int _gnutls_uint48pp(gnutls_uint64 * x)

{

	register int i, y = 0;

	for (i = 7; i >= 3; i--) {

		y = 0;

		if (x->i[i] == 0xff) {

			x->i[i] = 0;

			y = 1;

		} else

			x->i[i]++;

		if (y == 0)

			break;

	}

	if (y != 0)

		return -1;	/* over 48 bits */

	return 0;

}