ref: 2dabff3c93c430a7e5578327227e8b6789c31ccd
dir: /include/cst_endian.h/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 1999 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: August 2000 */
/*************************************************************************/
/* */
/* endianness */
/* */
/*************************************************************************/
#ifndef __CST_ENDIAN_H__
#define __CST_ENDIAN_H__
/* This gets set to 1 and we test where the on bit is to determine byteorder */
extern const int cst_endian_loc;
/* Sun, HP, SGI Mips, M68000, PowerPC, MIPS24K AR9331 (Yun Arduino, ZSun) */
#define CST_BIG_ENDIAN (((char *)&cst_endian_loc)[0] == 0)
/* Intel, Alpha, DEC Mips, Vax, ARM, Other MIPS (GCW-Zero, Ben Nanonote etc) */
#define CST_LITTLE_ENDIAN (((char *)&cst_endian_loc)[0] != 0)
/* Perq (from Three Rivers) has a third byte order -- but we have no support */
/* EST byte order strings */
#define BYTE_ORDER_BIG "10"
#define BYTE_ORDER_LITTLE "01"
#define SWAPINT(x) ((((unsigned int)x) & 0xff) << 24 | \
(((unsigned int)x) & 0xff00) << 8 | \
(((unsigned int)x) & 0xff0000) >> 8 | \
(((unsigned int)x) & 0xff000000) >> 24)
/* For m68k we want to be a little more explicit */
#define SWAPLONG(x) ((((unsigned long)x) & 0xff) << 24 | \
(((unsigned long)x) & 0xff00) << 8 | \
(((unsigned long)x) & 0xff0000) >> 8 | \
(((unsigned long)x) & 0xff000000) >> 24)
#define SWAPSHORT(x) ((((unsigned short)x) & 0xff) << 8 | \
(((unsigned short)x) & 0xff00) >> 8)
void swap_bytes_short(short * b,int n);
void swapdouble(double *d);
void swapfloat(float *f);
#endif