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/*
* Copyright (C) 2000,2001 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* GNUTLS 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.
*
* GNUTLS 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 <gnutls_int.h>
#include <gnutls_num.h>
#include <gnutls_errors.h>
#define rotl32(x,n) (((x) << ((uint16)(n))) | ((x) >> (32 - (uint16)(n))))
#define rotr32(x,n) (((x) >> ((uint16)(n))) | ((x) << (32 - (uint16)(n))))
#define rotl16(x,n) (((x) << ((uint16)(n))) | ((x) >> (16 - (uint16)(n))))
#define rotr16(x,n) (((x) >> ((uint16)(n))) | ((x) << (16 - (uint16)(n))))
#define byteswap16(x) ((rotl16(x, 8) & 0x00ff) | (rotr16(x, 8) & 0xff00))
#define byteswap32(x) ((rotl32(x, 8) & 0x00ff00ffUL) | (rotr32(x, 8) & 0xff00ff00UL))
#ifndef HAVE_UINT64
/* This function will set the uint64 x to zero
*/
int uint64zero( uint64 *x) {
memset( x->i, 0, 8);
return 0;
}
/* This function will add one to uint64 x.
* Returns 0 on success, or -1 if the uint64 max limit
* has been reached.
*/
int 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;
}
#endif /* HAVE_UINT64 */
uint32 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 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 READuint24( const opaque* data) {
uint32 res;
uint24 num;
num.pint[0] = data[0];
num.pint[1] = data[1];
num.pint[2] = data[2];
res = uint24touint32( num);
#ifndef WORDS_BIGENDIAN
res = byteswap32( res);
#endif
return res;
}
void WRITEuint24( uint32 num, opaque* data) {
uint24 tmp;
#ifndef WORDS_BIGENDIAN
num = byteswap32( num);
#endif
tmp = uint32touint24( num);
data[0] = tmp.pint[0];
data[1] = tmp.pint[1];
data[2] = tmp.pint[2];
return;
}
uint32 READuint32( const opaque* data) {
uint32 res;
memcpy( &res, data, sizeof(uint32));
#ifndef WORDS_BIGENDIAN
res = byteswap32( res);
#endif
return res;
}
void WRITEuint32( uint32 num, opaque* data) {
#ifndef WORDS_BIGENDIAN
num = byteswap32( num);
#endif
memcpy( data, &num, sizeof(uint32));
return;
}
uint16 READuint16( const opaque* data) {
uint16 res;
memcpy( &res, data, sizeof(uint16));
#ifndef WORDS_BIGENDIAN
res = byteswap16( res);
#endif
return res;
}
void WRITEuint16( uint16 num, opaque* data) {
#ifndef WORDS_BIGENDIAN
num = byteswap16( num);
#endif
memcpy( data, &num, sizeof(uint16));
return;
}
uint32 CONVuint32( uint32 data) {
#ifndef WORDS_BIGENDIAN
return byteswap32( data);
#else
return data;
#endif
}
uint16 CONVuint16( uint16 data) {
#ifndef WORDS_BIGENDIAN
return byteswap16( data);
#else
return data;
#endif
}
uint64 CONVuint64( const uint64* data) {
#ifdef HAVE_UINT64
# ifndef WORDS_BIGENDIAN
return byteswap64(*data);
# else
return *data;
# endif /* WORDS_BIGENDIAN */
#else
uint64 ret;
memcpy( ret.i, data->i, 8);
return ret;
#endif /* HAVE_UINT64 */
}
uint32 uint64touint32( const uint64* num) {
uint32 ret;
#ifdef HAVE_UINT64
ret = (uint32) *num;
#else /* no native uint64 */
memcpy( &ret, &num->i[4], 4);
# ifndef WORDS_BIGENDIAN
ret = byteswap32(ret);
# endif
#endif /* HAVE_UINT64 */
return ret;
}
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