text: /*-
   * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
   * 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.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
   *
   * $FreeBSD$
   */
  
  #ifndef _ENDIAN_H_
  #define _ENDIAN_H_
  
  #include <stdint.h>
  #include <sys/types.h>
  #include "byteswap.h"
  
  #ifndef BIG_ENDIAN
  #define BIG_ENDIAN 4321
  #endif
  #ifndef LITTLE_ENDIAN
  #define LITTLE_ENDIAN 1234
  #endif
  
  #ifndef BYTE_ORDER
  #ifdef __IEEE_LITTLE_ENDIAN
  #define BYTE_ORDER LITTLE_ENDIAN
  #else
  #define BYTE_ORDER BIG_ENDIAN
  #endif
  #endif
  
  #define _UINT8_T_DECLARED
  #ifndef _UINT8_T_DECLARED
  typedef	__uint8_t	uint8_t;
  #define	_UINT8_T_DECLARED
  #endif
  
  #define _UINT16_T_DECLARED
  #ifndef _UINT16_T_DECLARED
  typedef	__uint16_t	uint16_t;
  #define	_UINT16_T_DECLARED
  #endif
  
  #define _UINT32_T_DECLARED
  #ifndef _UINT32_T_DECLARED
  typedef	__uint32_t	uint32_t;
  #define	_UINT32_T_DECLARED
  #endif
  
  #define _UINT64_T_DECLARED
  #ifndef _UINT64_T_DECLARED
  typedef	__uint64_t	uint64_t;
  #define	_UINT64_T_DECLARED
  #endif
  
  /*
   * General byte order swapping functions.
   */
  #define	bswap16(x)	__bswap16(x)
  #define	bswap32(x)	__bswap32(x)
  #define	bswap64(x)	__bswap64(x)
  
  /*
   * Host to big endian, host to little endian, big endian to host, and little
   * endian to host byte order functions as detailed in byteorder(9).
   */
  #if BYTE_ORDER == _LITTLE_ENDIAN
  #define	htobe16(x)	bswap16((x))
  #define	htobe32(x)	bswap32((x))
  #define	htobe64(x)	bswap64((x))
  #define	htole16(x)	((uint16_t)(x))
  #define	htole32(x)	((uint32_t)(x))
  #define	htole64(x)	((uint64_t)(x))
  
  #define	be16toh(x)	bswap16((x))
  #define	be32toh(x)	bswap32((x))
  #define	be64toh(x)	bswap64((x))
  #define	le16toh(x)	((uint16_t)(x))
  #define	le32toh(x)	((uint32_t)(x))
  #define	le64toh(x)	((uint64_t)(x))
  
  #else /* _BYTE_ORDER != _LITTLE_ENDIAN */
  #define	htobe16(x)	((uint16_t)(x))
  #define	htobe32(x)	((uint32_t)(x))
  #define	htobe64(x)	((uint64_t)(x))
  #define	htole16(x)	bswap16((x))
  #define	htole32(x)	bswap32((x))
  #define	htole64(x)	bswap64((x))
  
  #define	be16toh(x)	((uint16_t)(x))
  #define	be32toh(x)	((uint32_t)(x))
  #define	be64toh(x)	((uint64_t)(x))
  #define	le16toh(x)	bswap16((x))
  #define	le32toh(x)	bswap32((x))
  #define	le64toh(x)	bswap64((x))
  #endif /* _BYTE_ORDER == _LITTLE_ENDIAN */
  
  /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
  #define INLINE                  __inline__
  
  static INLINE uint16_t
  be16dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return ((p[0] << 8) | p[1]);
  }
  
  static INLINE uint32_t
  be32dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
  }
  
  static INLINE uint64_t
  be64dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4));
  }
  
  static INLINE uint16_t
  le16dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return ((p[1] << 8) | p[0]);
  }
  
  static INLINE uint32_t
  le32dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return (((unsigned)p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
  }
  
  static INLINE uint64_t
  le64dec(const void *pp)
  {
  	uint8_t const *p = (uint8_t const *)pp;
  
  	return (((uint64_t)le32dec(p + 4) << 32) | le32dec(p));
  }
  
  static INLINE void
  be16enc(void *pp, uint16_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	p[0] = (u >> 8) & 0xff;
  	p[1] = u & 0xff;
  }
  
  static INLINE void
  be32enc(void *pp, uint32_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	p[0] = (u >> 24) & 0xff;
  	p[1] = (u >> 16) & 0xff;
  	p[2] = (u >> 8) & 0xff;
  	p[3] = u & 0xff;
  }
  
  static INLINE void
  be64enc(void *pp, uint64_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	be32enc(p, (uint32_t)(u >> 32));
  	be32enc(p + 4, (uint32_t)(u & 0xffffffffU));
  }
  
  static INLINE void
  le16enc(void *pp, uint16_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	p[0] = u & 0xff;
  	p[1] = (u >> 8) & 0xff;
  }
  
  static INLINE void
  le32enc(void *pp, uint32_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	p[0] = u & 0xff;
  	p[1] = (u >> 8) & 0xff;
  	p[2] = (u >> 16) & 0xff;
  	p[3] = (u >> 24) & 0xff;
  }
  
  static INLINE void
  le64enc(void *pp, uint64_t u)
  {
  	uint8_t *p = (uint8_t *)pp;
  
  	le32enc(p, (uint32_t)(u & 0xffffffffU));
  	le32enc(p + 4, (uint32_t)(u >> 32));
  }
  
  #endif	/* _ENDIAN_H_ */
  