/*      $NetBSD: endian.h,v 1.11 2006/11/16 23:01:16 uwe Exp $  */

/* Windows CE architecture */

/*
* This file should be just:

#include <sys/endian.h>

* but our <sys/endian.h> is no longer compilable with eVC3 and
* probably other old WinCE compilers because they don't grok ULL
* constant suffix.
*
* Instead of polluting sys/endian.h with WinCE compatibility
* ugliness, pull a copy here, so that we can hack it privately.
*/

/*      From: NetBSD: endian.h,v 1.23 2006/02/04 01:07:20 uwe Exp       */

/*
* Copyright (c) 1987, 1991, 1993
*      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*
*      @(#)endian.h    8.1 (Berkeley) 6/11/93
*/

#ifndef _SYS_ENDIAN_H_
#define _SYS_ENDIAN_H_

#include <sys/featuretest.h>

/*
* 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(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#ifndef _LOCORE

/* C-family endian-ness definitions */

#include <sys/ansi.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#ifndef in_addr_t
typedef __in_addr_t     in_addr_t;
#define in_addr_t       __in_addr_t
#endif

#ifndef in_port_t
typedef __in_port_t     in_port_t;
#define in_port_t       __in_port_t
#endif

__BEGIN_DECLS
uint32_t htonl(uint32_t) __attribute__((__const__));
uint16_t htons(uint16_t) __attribute__((__const__));
uint32_t ntohl(uint32_t) __attribute__((__const__));
uint16_t ntohs(uint16_t) __attribute__((__const__));
__END_DECLS

#endif /* !_LOCORE */
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */


#include <machine/endian_machdep.h>

/*
* Define the order of 32-bit words in 64-bit words.
*/
#if _BYTE_ORDER == _LITTLE_ENDIAN
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
#endif

#if _BYTE_ORDER == _BIG_ENDIAN
#define _QUAD_HIGHWORD 0
#define _QUAD_LOWWORD 1
#endif


#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
/*
*  Traditional names for byteorder.  These are defined as the numeric
*  sequences so that third party code can "#define XXX_ENDIAN" and not
*  cause errors.
*/
#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 */
#define BYTE_ORDER      _BYTE_ORDER

#ifndef _LOCORE

#include <machine/bswap.h>

/*
* 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   /* LITTLE_ENDIAN || !defined(__lint__) */

/* XXX: uwe: Use ntohl &co supplied by WinCE. */
#if 0
#define ntohl(x)        bswap32((uint32_t)(x))
#define ntohs(x)        bswap16((uint16_t)(x))
#define htonl(x)        bswap32((uint32_t)(x))
#define htons(x)        bswap16((uint16_t)(x))
#endif

#define NTOHL(x)        (x) = ntohl((uint32_t)(x))
#define NTOHS(x)        (x) = ntohs((uint16_t)(x))
#define HTONL(x)        (x) = htonl((uint32_t)(x))
#define HTONS(x)        (x) = htons((uint16_t)(x))
#endif  /* LITTLE_ENDIAN || !defined(__lint__) */

/*
* Macros to convert to a specific endianness.
*/

#if BYTE_ORDER == BIG_ENDIAN

#define htobe16(x)      (x)
#define htobe32(x)      (x)
#define htobe64(x)      (x)
#define htole16(x)      bswap16((uint16_t)(x))
#define htole32(x)      bswap32((uint32_t)(x))
#define htole64(x)      bswap64((uint64_t)(x))

#define HTOBE16(x)      (void) (x)
#define HTOBE32(x)      (void) (x)
#define HTOBE64(x)      (void) (x)
#define HTOLE16(x)      (x) = bswap16((uint16_t)(x))
#define HTOLE32(x)      (x) = bswap32((uint32_t)(x))
#define HTOLE64(x)      (x) = bswap64((uint64_t)(x))

#else   /* LITTLE_ENDIAN */

#define htobe16(x)      bswap16((uint16_t)(x))
#define htobe32(x)      bswap32((uint32_t)(x))
#define htobe64(x)      bswap64((uint64_t)(x))
#define htole16(x)      (x)
#define htole32(x)      (x)
#define htole64(x)      (x)

#define HTOBE16(x)      (x) = bswap16((uint16_t)(x))
#define HTOBE32(x)      (x) = bswap32((uint32_t)(x))
#define HTOBE64(x)      (x) = bswap64((uint64_t)(x))
#define HTOLE16(x)      (void) (x)
#define HTOLE32(x)      (void) (x)
#define HTOLE64(x)      (void) (x)

#endif  /* LITTLE_ENDIAN */

#define be16toh(x)      htobe16(x)
#define be32toh(x)      htobe32(x)
#define be64toh(x)      htobe64(x)
#define le16toh(x)      htole16(x)
#define le32toh(x)      htole32(x)
#define le64toh(x)      htole64(x)

#define BE16TOH(x)      HTOBE16(x)
#define BE32TOH(x)      HTOBE32(x)
#define BE64TOH(x)      HTOBE64(x)
#define LE16TOH(x)      HTOLE16(x)
#define LE32TOH(x)      HTOLE32(x)
#define LE64TOH(x)      HTOLE64(x)

/*
* Routines to encode/decode big- and little-endian multi-octet values
* to/from an octet stream.
*/

static __inline void __unused
be16enc(void *buf, uint16_t u)
{
       uint8_t *p = (uint8_t *)buf;

       p[0] = ((unsigned)u >> 8) & 0xff;
       p[1] = u & 0xff;
}

static __inline void __unused
le16enc(void *buf, uint16_t u)
{
       uint8_t *p = (uint8_t *)buf;

       p[0] = u & 0xff;
       p[1] = ((unsigned)u >> 8) & 0xff;
}

static __inline uint16_t __unused
be16dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return ((p[0] << 8) | p[1]);
}

static __inline uint16_t __unused
le16dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return ((p[1] << 8) | p[0]);
}

static __inline void __unused
be32enc(void *buf, uint32_t u)
{
       uint8_t *p = (uint8_t *)buf;

       p[0] = (u >> 24) & 0xff;
       p[1] = (u >> 16) & 0xff;
       p[2] = (u >> 8) & 0xff;
       p[3] = u & 0xff;
}

static __inline void __unused
le32enc(void *buf, uint32_t u)
{
       uint8_t *p = (uint8_t *)buf;

       p[0] = u & 0xff;
       p[1] = (u >> 8) & 0xff;
       p[2] = (u >> 16) & 0xff;
       p[3] = (u >> 24) & 0xff;
}

static __inline uint32_t __unused
be32dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
}

static __inline uint32_t __unused
le32dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
}


/*
* XXX: uwe: ULL suffix makes eVC unhappy.  Since nothing in hpcboot
* needs 64-bit enc/dec routines - just ifdef them out for now.
*/
#ifndef _WIN32

static __inline void __unused
be64enc(void *buf, uint64_t u)
{
       uint8_t *p = (uint8_t *)buf;

       be32enc(p, (uint32_t)(u >> 32));
       be32enc(p + 4, (uint32_t)(u & 0xffffffffULL));
}

static __inline void __unused
le64enc(void *buf, uint64_t u)
{
       uint8_t *p = (uint8_t *)buf;

       le32enc(p, (uint32_t)(u & 0xffffffffULL));
       le32enc(p + 4, (uint32_t)(u >> 32));
}

static __inline uint64_t __unused
be64dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
}

static __inline uint64_t __unused
le64dec(const void *buf)
{
       const uint8_t *p = (const uint8_t *)buf;

       return (le32dec(p) | ((uint64_t)le32dec(p + 4) << 32));
}
#endif /* !_WIN32 */

#endif /* !_LOCORE */
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
#endif /* !_SYS_ENDIAN_H_ */

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