/*

 * 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>

/* data should be at least 3 bytes */

inline static uint32_t _gnutls_read_uint24(const uint8_t * data)

{

	return (data[0] << 16) | (data[1] << 8) | (data[2]);

}

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)

{

	data[0] = num >> 16;

	data[1] = num >> 8;

	data[2] = num;

}

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 */