endian.h

T－kernel Tcp/ip Protocol Stack Sample

/****************************************************************************
 * Copyright (C) 2001-2006 MITSUBISHI ELECTRIC CORPORATION and
 * RENESAS SOLUTIONS CORPORATION
 * All rights reserved.
 *
 ****************************************************************************
 * Copyright (C) 1995 Wolfgang Solfrank.
 * Copyright (C) 1995 TooLs GmbH.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef	_ENDIAN_H_
#define	_ENDIAN_H_

#ifndef	_POSIX_SOURCE

#define _QUAD_HIGHWORD	0
#define _QUAD_LOWWORD	1

/*
 * Definitions for byte order, according to byte significance from low
 * address to high.
 */
#define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
#define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */

#if defined(CPU_M32R) || defined(CPU_SH2)
#define	BYTE_ORDER	BIG_ENDIAN
#elif defined(CPU_SH3)
#define	BYTE_ORDER	LITTLE_ENDIAN
#endif

#ifndef	EMB_SYS
#include <sys/cdefs.h>

typedef u_int32_t	in_addr_t;
typedef u_int16_t	in_port_t;

__BEGIN_DECLS
in_addr_t htonl __P((in_addr_t));
in_port_t htons __P((in_port_t));
in_addr_t ntohl __P((in_addr_t));
in_port_t ntohs __P((in_port_t));
u_int16_t	bswap16 __P((u_int16_t));
u_int32_t	bswap32 __P((u_int32_t));
u_int64_t	bswap64 __P((u_int64_t));
__END_DECLS
#endif /* !EMB_SYS */

/*
 * Macros for network/external number representation conversion.
 */
#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
#define	ntohl(x)	(x)
#define	ntohs(x)	(x)
#define	htonl(x)	(x)
#define	htons(x)	(x)

#define	NTOHL(x)	(void) (x)
#define	NTOHS(x)	(void) (x)
#define	HTONL(x)	(void) (x)
#define	HTONS(x)	(void) (x)

#else

#define	NTOHL(x)	(x) = ntohl((unsigned long)x)
#define	NTOHS(x)	(x) = ntohs((unsigned short)x)
#define	HTONL(x)	(x) = htonl((unsigned long)x)
#define	HTONS(x)	(x) = htons((unsigned short)x)

extern unsigned long htonl(unsigned long);
extern unsigned short htons(unsigned short);
extern unsigned long ntohl(unsigned long);
extern unsigned short ntohs(unsigned short);
#endif

#endif	/* !_POSIX_SOURCE */

#endif	/* _ENDIAN_H_ */