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- /*
- * Copyright (c) 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#)useful.h 4.6 (Berkeley) 6/1/90
- */
-
- # include <sys/types.h>
-
- /* support for bool type */
- typedef char bool;
- # define TRUE 1
- # define FALSE 0
-
- # ifndef NULL
- # define NULL 0
- # endif NULL
-
- /* bit hacking */
- # define bitset(bit, word) (((word) & (bit)) != 0)
-
- /* some simple functions */
- # ifndef max
- # define max(a, b) ((a) > (b) ? (a) : (b))
- # define min(a, b) ((a) < (b) ? (a) : (b))
- # endif max
-
- /* assertions */
- # ifndef NASSERT
- # define ASSERT(expr, msg, parm)\
- if (!(expr))\
- {\
- fprintf(stderr, "assertion botch: %s:%d: ", __FILE__, __LINE__);\
- fprintf(stderr, msg, parm);\
- }
- # else NASSERT
- # define ASSERT(expr, msg, parm)
- # endif NASSERT
-
- /* sccs id's */
- # ifndef lint
- # define SCCSID(arg) static char SccsId[] = "arg";
- # else lint
- # define SCCSID(arg)
- # endif lint
-
- /* define the types of some common functions */
- extern char *strcpy(), *strncpy();
- extern char *strcat(), *strncat();
- extern char *malloc();
- extern char *index(), *rindex();
- extern int errno;
- extern time_t time();
- extern char *ctime();
- extern char *getenv();
-