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/*
* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation
*
* Author: Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
/* 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;
}
uint32 _gnutls_uint24touint32(uint24 num)
{
uint32 ret = 0;
((uint8 *) & ret)[1] = num.pint[0];
((uint8 *) & ret)[2] = num.pint[1];
((uint8 *) & ret)[3] = num.pint[2];
return ret;
}
uint24 _gnutls_uint32touint24(uint32 num)
{
uint24 ret;
ret.pint[0] = ((uint8 *) & num)[1];
ret.pint[1] = ((uint8 *) & num)[2];
ret.pint[2] = ((uint8 *) & num)[3];
return ret;
}
/* data should be at least 3 bytes */
uint32 _gnutls_read_uint24(const opaque * data)
{
uint32 res;
uint24 num;
num.pint[0] = data[0];
num.pint[1] = data[1];
num.pint[2] = data[2];
res = _gnutls_uint24touint32(num);
#ifndef WORDS_BIGENDIAN
res = byteswap32(res);
#endif
return res;
}
void _gnutls_write_uint24(uint32 num, opaque * data)
{
uint24 tmp;
#ifndef WORDS_BIGENDIAN
num = byteswap32(num);
#endif
tmp = _gnutls_uint32touint24(num);
data[0] = tmp.pint[0];
data[1] = tmp.pint[1];
data[2] = tmp.pint[2];
}
uint32 _gnutls_read_uint32(const opaque * data)
{
uint32 res;
memcpy(&res, data, sizeof(uint32));
#ifndef WORDS_BIGENDIAN
res = byteswap32(res);
#endif
return res;
}
void _gnutls_write_uint32(uint32 num, opaque * data)
{
#ifndef WORDS_BIGENDIAN
num = byteswap32(num);
#endif
memcpy(data, &num, sizeof(uint32));
}
uint16 _gnutls_read_uint16(const opaque * data)
{
uint16 res;
memcpy(&res, data, sizeof(uint16));
#ifndef WORDS_BIGENDIAN
res = byteswap16(res);
#endif
return res;
}
void _gnutls_write_uint16(uint16 num, opaque * data)
{
#ifndef WORDS_BIGENDIAN
num = byteswap16(num);
#endif
memcpy(data, &num, sizeof(uint16));
}
uint32 _gnutls_conv_uint32(uint32 data)
{
#ifndef WORDS_BIGENDIAN
return byteswap32(data);
#else
return data;
#endif
}
uint16 _gnutls_conv_uint16(uint16 data)
{
#ifndef WORDS_BIGENDIAN
return byteswap16(data);
#else
return data;
#endif
}
uint32 _gnutls_uint64touint32(const uint64 * num)
{
uint32 ret;
memcpy(&ret, &num->i[4], 4);
#ifndef WORDS_BIGENDIAN
ret = byteswap32(ret);
#endif
return ret;
}
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