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      1 /*-
      2  * This code is derived from OpenBSD's libc/regex, original license follows:
      3  *
      4  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
      5  * Copyright (c) 1992, 1993, 1994
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Henry Spencer.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)utils.h	8.3 (Berkeley) 3/20/94
     36  */
     37 
     38 /* utility definitions */
     39 #define	NC		(CHAR_MAX - CHAR_MIN + 1)
     40 typedef unsigned char uch;
     41 
     42 /* switch off assertions (if not already off) if no REDEBUG */
     43 #ifndef REDEBUG
     44 #ifndef NDEBUG
     45 #define	NDEBUG	/* no assertions please */
     46 #endif
     47 #endif
     48 #include <assert.h>
     49 
     50 /* for old systems with bcopy() but no memmove() */
     51 #ifdef USEBCOPY
     52 #define	memmove(d, s, c)	bcopy(s, d, c)
     53 #endif
     54