games/trek/utility.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)utility.c        8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/trek/utility.c,v 1.5 1999/11/30 03:49:55 billf Exp $
  31  * $DragonFly: src/games/trek/utility.c,v 1.4 2006/09/07 21:19:45 pavalos Exp $
  32  */
  33
  34 #include <errno.h>
  35 #include <stdarg.h>
  36 #include "trek.h"
  37
  38 /*
  39 **  ASSORTED UTILITY ROUTINES
  40 */
  41
  42 /*
  43 **  BLOCK MOVE
  44 **
  45 **      Moves a block of storage of length `l' bytes from the data
  46 **      area pointed to by `a' to the area pointed to by `b'.
  47 **      Returns the address of the byte following the `b' field.
  48 **      Overflow of `b' is not tested.
  49 */
  50
  51 char *
  52 bmove(const void *a, void *b, size_t l)
  53 {
  54         return((char *)memcpy(b, a, l) + l);
  55 }
  56
  57
  58 /*
  59 **  STRING EQUALITY TEST
  60 **      null-terminated strings `a' and `b' are tested for
  61 **      absolute equality.
  62 **      returns one if equal, zero otherwise.
  63 */
  64
  65 bool
  66 sequal(const char *a, const char *b)
  67 {
  68         return(!strcmp(a, b));
  69 }
  70
  71
  72 /*
  73 **  SYSTEM ERROR
  74 */
  75
  76 void
  77 syserr(const char *fmt, ...)
  78 {
  79         va_list ap;
  80
  81         va_start(ap, fmt);
  82         printf("\n\07TREK SYSERR: ");
  83         vprintf(fmt, ap);
  84         printf("\n");
  85         if (errno)
  86                 printf("\tsystem error %d\n", errno);
  87         va_end(ap);
  88         exit(1);
  89 }