freebsd-src/games/trek/utility.c
Jordan K. Hubbard 554eb505f8 Bring in the 4.4 Lite games directory, modulo man page changes and segregation
of the x11 based games.  I'm not going to tag the originals with bsd_44_lite
and do this in two stages since it's just not worth it for this collection,
and I've got directory renames to deal with that way.  Bleah.
Submitted by:	jkh
1994-09-04 04:03:31 +00:00

151 lines
3.5 KiB
C

/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char sccsid[] = "@(#)utility.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
/*
** ASSORTED UTILITY ROUTINES
*/
/*
** BLOCK MOVE
**
** Moves a block of storage of length `l' bytes from the data
** area pointed to by `a' to the area pointed to by `b'.
** Returns the address of the byte following the `b' field.
** Overflow of `b' is not tested.
*/
char *bmove(a, b, l)
char *a, *b;
int l;
{
register int n;
register char *p, *q;
p = a;
q = b;
n = l;
while (n--)
*q++ = *p++;
return (q);
}
/*
** STRING EQUALITY TEST
** null-terminated strings `a' and `b' are tested for
** absolute equality.
** returns one if equal, zero otherwise.
*/
sequal(a, b)
char *a, *b;
{
register char *p, *q;
p = a;
q = b;
while (*p || *q)
if (*p++ != *q++)
return(0);
return(1);
}
/*
** STRING CONCATENATE
**
** The strings `s1' and `s2' are concatenated and stored into
** `s3'. It is ok for `s1' to equal `s3', but terrible things
** will happen if `s2' equals `s3'. The return value is is a
** pointer to the end of `s3' field.
*/
char *concat(s1, s2, s3)
char *s1, *s2, *s3;
{
register char *p;
register char *q;
p = s3;
q = s1;
while (*q)
*p++ = *q++;
q = s2;
while (*q)
*p++ = *q++;
*p = 0;
return (p);
}
/*
** FIND STRING LENGTH
**
** The length of string `s' (excluding the null byte which
** terminates the string) is returned.
*/
length(s)
char *s;
{
register int l;
register char *p;
l = 0;
p = s;
while (*p++)
l++;
return(l);
}
/*
** SYSTEM ERROR
*/
syserr(p0, p1, p2, p3, p4, p5)
{
extern int errno;
printf("\n\07TREK SYSERR: ");
printf(p0, p1, p2, p3, p4, p5);
printf("\n");
if (errno)
printf("\tsystem error %d\n", errno);
exit(-1);
}