/*-
  * This code is derived from OpenBSD's libc/regex, original license follows:
  *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
  *
  * This code is derived from software contributed to Berkeley by
  * Henry Spencer.
  *
  * 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.
  *
  *	@(#)utils.h	8.3 (Berkeley) 3/20/94
  */
 
 /* utility definitions */
 #define	DUPMAX		_POSIX2_RE_DUP_MAX	/* xxx is this right? */
 #define	INFINITY	(DUPMAX + 1)
 #define	NC		(CHAR_MAX - CHAR_MIN + 1)
 typedef unsigned char uch;
 
 /* switch off assertions (if not already off) if no REDEBUG */
 #ifdef CL_DEBUG
 #define REDEBUG
 #endif
 
 #ifndef REDEBUG
 #ifndef NDEBUG
 #define	NDEBUG	/* no assertions please */
 #endif
 #endif
 #include <assert.h>
 
 /* for old systems with bcopy() but no memmove() */
 #ifdef USEBCOPY
 #define	memmove(d, s, c)	bcopy(s, d, c)
 #endif