games/trek/main.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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)main.c   8.1 (Berkeley) 5/31/93
  35  * $FreeBSD: src/games/trek/main.c,v 1.7.2.1 2001/03/05 12:11:14 kris Exp $
  36  * $DragonFly: src/games/trek/main.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  37  */
  38
  39 # include       "getpar.h"
  40 # include       "trek.h"
  41 # include       <sgtty.h>
  42
  43 # define        PRIO            00      /* default priority */
  44
  45 unsigned int    Mother  = 51 + (51 << 8);
  46
  47 /*
  48 **       ####  #####    #    ####          #####  ####   #####  #   #
  49 **      #        #     # #   #   #           #    #   #  #      #  #
  50 **       ###     #    #####  ####            #    ####   ###    ###
  51 **          #    #    #   #  #  #            #    #  #   #      #  #
  52 **      ####     #    #   #  #   #           #    #   #  #####  #   #
  53 **
  54 **      C version by Eric P. Allman 5/76 (U.C. Berkeley) with help
  55 **              from Jeff Poskanzer and Pete Rubinstein.
  56 **
  57 **      I also want to thank everyone here at Berkeley who
  58 **      where crazy enough to play the undebugged game.  I want to
  59 **      particularly thank Nick Whyte, who made considerable
  60 **      suggestions regarding the content of the game.  Why, I'll
  61 **      never forget the time he suggested the name for the
  62 **      "capture" command.
  63 **
  64 **      Please send comments, questions, and suggestions about this
  65 **              game to:
  66 **                      Eric P. Allman
  67 **                      Project INGRES
  68 **                      Electronics Research Laboratory
  69 **                      Cory Hall
  70 **                      University of California
  71 **                      Berkeley, California  94720
  72 **
  73 **      If you make ANY changes in the game, I sure would like to
  74 **      know about them.  It is sort of an ongoing project for me,
  75 **      and I very much want to put in any bug fixes and improvements
  76 **      that you might come up with.
  77 **
  78 **      FORTRASH version by Kay R. Fisher (DEC) "and countless others".
  79 **      That was adapted from the "original BASIC program" (ha!) by
  80 **              Mike Mayfield (Centerline Engineering).
  81 **
  82 **      Additional inspiration taken from FORTRAN version by
  83 **              David Matuszek and Paul Reynolds which runs on the CDC
  84 **              7600 at Lawrence Berkeley Lab, maintained there by
  85 **              Andy Davidson.  This version is also available at LLL
  86 **              and at LMSC.  In all fairness, this version was the
  87 **              major inspiration for this version of the game (trans-
  88 **              lation:  I ripped off a whole lot of code).
  89 **
  90 **      Minor other input from the "Battelle Version 7A" by Joe Miller
  91 **              (Graphics Systems Group, Battelle-Columbus Labs) and
  92 **              Ross Pavlac (Systems Programmer, Battelle Memorial
  93 **              Institute).  That version was written in December '74
  94 **              and extensively modified June '75.  It was adapted
  95 **              from the FTN version by Ron Williams of CDC Sunnyvale,
  96 **              which was adapted from the Basic version distributed
  97 **              by DEC.  It also had "neat stuff swiped" from T. T.
  98 **              Terry and Jim Korp (University of Texas), Hicks (Penn
  99 **              U.), and Rick Maus (Georgia Tech).  Unfortunately, it
 100 **              was not as readable as it could have been and so the
 101 **              translation effort was severely hampered.  None the
 102 **              less, I got the idea of inhabited starsystems from this
 103 **              version.
 104 **
 105 **      Permission is given for use, copying, and modification of
 106 **              all or part of this program and related documentation,
 107 **              provided that all reference to the authors are maintained.
 108 **
 109 **
 110 **********************************************************************
 111 **
 112 **  NOTES TO THE MAINTAINER:
 113 **
 114 **      There is a compilation option xTRACE which must be set for any
 115 **      trace information to be generated.  It is probably defined in
 116 **      the version that you get.  It can be removed, however, if you
 117 **      have trouble finding room in core.
 118 **
 119 **      Many things in trek are not as clear as they might be, but are
 120 **      done to reduce space.  I compile with the -f and -O flags.  I
 121 **      am constrained to running with non-separated I/D space, since
 122 **      we don't have doubleing point hardware here; even if we did, I
 123 **      would like trek to be available to the large number of people
 124 **      who either have an 11/40 or do not have FP hardware.  I also
 125 **      found it desirable to make the code run reentrant, so this
 126 **      added even more space constraints.
 127 **
 128 **      I use the portable C library to do my I/O.  This is done be-
 129 **      cause I wanted the game easily transportable to other C
 130 **      implementations, and because I was too lazy to do the doubleing
 131 **      point input myself.  Little did I know.  The portable C library
 132 **      released by Bell Labs has more bugs than you would believe, so
 133 **      I ended up rewriting the whole blessed thing.  Trek excercises
 134 **      many of the bugs in it, as well as bugs in some of the section
 135 **      III UNIX routines.  We have fixed them here.  One main problem
 136 **      was a bug in alloc() that caused it to always ask for a large
 137 **      hunk of memory, which worked fine unless you were almost out,
 138 **      which I inevitably was.  If you want the code for all of this
 139 **      stuff, it is also available through me.
 140 **
 141 ***********************************************************************
 142 */
 143
 144 jmp_buf env;
 145
 146 int
 147 main(int argc, char **argv)
 148 {
 149         /* extern FILE          *f_log; */
 150         char            opencode;
 151         int                     prio;
 152         int             ac;
 153         char            **av;
 154         struct  sgttyb          argp;
 155
 156         /* revoke */
 157         setgid(getgid());
 158
 159         av = argv;
 160         ac = argc;
 161         av++;
 162         srandomdev();
 163         opencode = 'w';
 164         prio = PRIO;
 165         if (ioctl(1, TIOCGETP, &argp) == 0)
 166         {
 167                 if ((argp.sg_ispeed ) < B1200)
 168                         Etc.fast++;
 169         }
 170         while (ac > 1 && av[0][0] == '-')
 171         {
 172                 switch (av[0][1])
 173                 {
 174                   case 'a':     /* append to log file */
 175                         opencode = 'a';
 176                         break;
 177
 178                   case 'f':     /* set fast mode */
 179                         Etc.fast++;
 180                         break;
 181
 182                   case 's':     /* set slow mode */
 183                         Etc.fast = 0;
 184                         break;
 185
 186 #               ifdef xTRACE
 187                   case 't':     /* trace */
 188                         if (getuid() != Mother)
 189                                 goto badflag;
 190                         Trace++;
 191                         break;
 192 #               endif
 193
 194                   case 'p':     /* set priority */
 195                         if (getuid() != Mother)
 196                                 goto badflag;
 197                         prio = atoi(av[0] + 2);
 198                         break;
 199
 200                   default:
 201                   badflag:
 202                         printf("Invalid option: %s\n", av[0]);
 203
 204                 }
 205                 ac--;
 206                 av++;
 207         }
 208         if (ac > 2)
 209                 syserr(0, "arg count");
 210                 /*
 211         if (ac > 1)
 212                 f_log = fopen(av[0], opencode);
 213                 */
 214
 215         printf("\n   * * *   S T A R   T R E K   * * *\n\nPress return to continue.\n");
 216
 217         if (setjmp(env))
 218         {
 219                 if ( !getynpar("Another game") )
 220                         exit(0);
 221         }
 222         do
 223         {
 224                 setup();
 225                 play();
 226         } while (getynpar("Another game"));
 227
 228         fflush(stdout);
 229         return(0);
 230 }