1 files changed, 150 insertions, 0 deletions
diff --git a/trek/utility.c b/trek/utility.c
new file mode 100644
index 00000000..b44e8acf
--- /dev/null
+++ b/trek/utility.c
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+/*
+ * Copyright (c) 1980 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	5.4 (Berkeley) 6/1/90";
+#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);
+}