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/*
* 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 <gnutls_num.h>
#include <gnutls_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(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(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;
}
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