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/*
* Copyright (C) 2000,2001,2002,2003 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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