/*

 * 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/>

 *

 */

#ifndef GNUTLS_NUM_H

#define GNUTLS_NUM_H

#include "gnutls_int.h"

#include <minmax.h>

#include <byteswap.h>

int _gnutls_uint64pp(gnutls_uint64 *);

int _gnutls_uint48pp(gnutls_uint64 *);

#define UINT64DATA(x) ((x).i)

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 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

}

inline static uint32_t _gnutls_uint64touint32(const gnutls_uint64 * num)

{

	uint32_t ret;

	memcpy(&ret, &num->i[4], 4);

#ifndef WORDS_BIGENDIAN

	ret = bswap_32(ret);

#endif

	return ret;

}

#endif				/* GNUTLS_NUM_H */