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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 <https://www.gnu.org/licenses/>
*
*/
#ifndef GNUTLS_LIB_NUM_H
#define GNUTLS_LIB_NUM_H
#include "gnutls_int.h"
#include <minmax.h>
#include <byteswap.h>
inline static uint32_t _gnutls_uint24touint32(uint24 num)
{
uint32_t ret = 0;
((uint8_t *) & ret)[1] = num.pint[0];
((uint8_t *) & ret)[2] = num.pint[1];
((uint8_t *) & ret)[3] = num.pint[2];
return ret;
}
inline static uint24 _gnutls_uint32touint24(uint32_t num)
{
uint24 ret;
ret.pint[0] = ((uint8_t *) & num)[1];
ret.pint[1] = ((uint8_t *) & num)[2];
ret.pint[2] = ((uint8_t *) & num)[3];
return ret;
}
/* data should be at least 3 bytes */
inline static uint32_t _gnutls_read_uint24(const uint8_t * data)
{
uint32_t 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 = bswap_32(res);
#endif
return res;
}
inline static uint64_t _gnutls_read_uint64(const uint8_t * data)
{
uint64_t res;
memcpy(&res, data, sizeof(uint64_t));
#ifndef WORDS_BIGENDIAN
res = bswap_64(res);
#endif
return res;
}
inline static void _gnutls_write_uint64(uint64_t num, uint8_t * data)
{
#ifndef WORDS_BIGENDIAN
num = bswap_64(num);
#endif
memcpy(data, &num, 8);
}
inline static void _gnutls_write_uint24(uint32_t num, uint8_t * data)
{
uint24 tmp;
#ifndef WORDS_BIGENDIAN
num = bswap_32(num);
#endif
tmp = _gnutls_uint32touint24(num);
data[0] = tmp.pint[0];
data[1] = tmp.pint[1];
data[2] = tmp.pint[2];
}
inline static uint32_t _gnutls_read_uint32(const uint8_t * data)
{
uint32_t res;
memcpy(&res, data, sizeof(uint32_t));
#ifndef WORDS_BIGENDIAN
res = bswap_32(res);
#endif
return res;
}
inline static void _gnutls_write_uint32(uint32_t num, uint8_t * data)
{
#ifndef WORDS_BIGENDIAN
num = bswap_32(num);
#endif
memcpy(data, &num, sizeof(uint32_t));
}
inline static uint16_t _gnutls_read_uint16(const uint8_t * data)
{
uint16_t res;
memcpy(&res, data, sizeof(uint16_t));
#ifndef WORDS_BIGENDIAN
res = bswap_16(res);
#endif
return res;
}
inline static void _gnutls_write_uint16(uint16_t num, uint8_t * data)
{
#ifndef WORDS_BIGENDIAN
num = bswap_16(num);
#endif
memcpy(data, &num, sizeof(uint16_t));
}
inline static uint32_t _gnutls_conv_uint32(uint32_t data)
{
#ifndef WORDS_BIGENDIAN
return bswap_32(data);
#else
return data;
#endif
}
inline static uint16_t _gnutls_conv_uint16(uint16_t data)
{
#ifndef WORDS_BIGENDIAN
return bswap_16(data);
#else
return data;
#endif
}
#endif /* GNUTLS_LIB_NUM_H */
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