/usr/include/sphinxbase/byteorder.h is in libsphinxbase-dev 0.4.1-0ubuntu4.
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/* ====================================================================
* Copyright (c) 1999-2001 Carnegie Mellon University. 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 work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED 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 CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES 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.
*
* ====================================================================
*
*/
/*
* byteorder.h -- Byte swapping ordering macros.
*
* **********************************************
* CMU ARPA Speech Project
*
* Copyright (c) 1996 Carnegie Mellon University.
* ALL RIGHTS RESERVED.
* **********************************************
*
* HISTORY
*
* $Log: byteorder.h,v $
* Revision 1.8 2005/09/01 21:09:54 dhdfu
* Really, actually, truly consolidate byteswapping operations into
* byteorder.h. Where unconditional byteswapping is needed, SWAP_INT32()
* and SWAP_INT16() are to be used. The WORDS_BIGENDIAN macro from
* autoconf controls the functioning of the conditional swap macros
* (SWAP_?[LW]) whose names and semantics have been regularized.
* Private, adhoc macros have been removed.
*
*/
#ifndef __S2_BYTEORDER_H__
#define __S2_BYTEORDER_H__ 1
/* Macro to byteswap an int16 variable. x = ptr to variable */
#define SWAP_INT16(x) *(x) = ((0x00ff & (*(x))>>8) | (0xff00 & (*(x))<<8))
/* Macro to byteswap an int32 variable. x = ptr to variable */
#define SWAP_INT32(x) *(x) = ((0x000000ff & (*(x))>>24) | \
(0x0000ff00 & (*(x))>>8) | \
(0x00ff0000 & (*(x))<<8) | \
(0xff000000 & (*(x))<<24))
/* Macro to byteswap a float32 variable. x = ptr to variable */
#define SWAP_FLOAT32(x) SWAP_INT32((int32 *) x)
/* Macro to byteswap a float64 variable. x = ptr to variable */
#define SWAP_FLOAT64(x) { int *low = (int *) (x), *high = (int *) (x) + 1,\
temp;\
SWAP_INT32(low); SWAP_INT32(high);\
temp = *low; *low = *high; *high = temp;}
/* Rather confusing backwards compatibility macros for dealing with
* explicitly big or little-endian data. */
#ifdef WORDS_BIGENDIAN
#define SWAP_BE_64(x)
#define SWAP_BE_32(x)
#define SWAP_BE_16(x)
#define SWAP_LE_64(x) SWAP_FLOAT64(x)
#define SWAP_LE_32(x) SWAP_INT32(x)
#define SWAP_LE_16(x) SWAP_INT16(x)
#else
#define SWAP_LE_64(x)
#define SWAP_LE_32(x)
#define SWAP_LE_16(x)
#define SWAP_BE_64(x) SWAP_FLOAT64(x)
#define SWAP_BE_32(x) SWAP_INT32(x)
#define SWAP_BE_16(x) SWAP_INT16(x)
#endif
#endif
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