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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);
- }
-