162 lines
3.6 KiB
C
162 lines
3.6 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)utility.c 8.1 (Berkeley) 5/31/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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** ASSORTED UTILITY ROUTINES
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*/
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#include <stdio.h>
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#include <varargs.h>
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/*
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** BLOCK MOVE
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**
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** Moves a block of storage of length `l' bytes from the data
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** area pointed to by `a' to the area pointed to by `b'.
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** Returns the address of the byte following the `b' field.
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** Overflow of `b' is not tested.
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*/
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char *bmove(a, b, l)
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char *a, *b;
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int l;
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{
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int n;
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char *p, *q;
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p = a;
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q = b;
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n = l;
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while (n--)
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*q++ = *p++;
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return (q);
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}
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/*
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** STRING EQUALITY TEST
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** null-terminated strings `a' and `b' are tested for
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** absolute equality.
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** returns one if equal, zero otherwise.
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*/
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sequal(a, b)
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char *a, *b;
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{
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char *p, *q;
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p = a;
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q = b;
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while (*p || *q)
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if (*p++ != *q++)
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return(0);
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return(1);
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}
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/*
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** STRING CONCATENATE
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**
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** The strings `s1' and `s2' are concatenated and stored into
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** `s3'. It is ok for `s1' to equal `s3', but terrible things
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** will happen if `s2' equals `s3'. The return value is is a
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** pointer to the end of `s3' field.
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*/
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char *concat(s1, s2, s3)
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char *s1, *s2, *s3;
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{
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char *p;
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char *q;
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p = s3;
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q = s1;
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while (*q)
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*p++ = *q++;
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q = s2;
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while (*q)
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*p++ = *q++;
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*p = 0;
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return (p);
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}
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/*
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** FIND STRING LENGTH
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**
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** The length of string `s' (excluding the null byte which
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** terminates the string) is returned.
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*/
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length(s)
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char *s;
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{
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int l;
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char *p;
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l = 0;
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p = s;
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while (*p++)
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l++;
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return(l);
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}
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/*
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** SYSTEM ERROR
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*/
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syserr(fmt, va_alist)
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const char *fmt;
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va_dcl
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{
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va_list ap;
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extern int errno;
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va_start(ap);
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printf("\n\07TREK SYSERR: ");
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vfprintf(stdout, fmt, ap);
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printf("\n");
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if (errno)
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printf("\tsystem error %d\n", errno);
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va_end(ap);
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exit(1);
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}
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