games/ppt/ppt.c

   1 /*-
   2  * Copyright (c) 1988, 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  * @(#) Copyright (c) 1988, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)ppt.c    8.1 (Berkeley) 5/31/93
  31  * $NetBSD: ppt.c,v 1.4 1995/03/23 08:35:40 cgd Exp $
  32  * $OpenBSD: ppt.c,v 1.17 2016/03/07 12:07:56 mestre Exp $
  33  */
  34
  35 #include <err.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40 #include <vis.h>
  41
  42
  43 #define EDGE    "___________"
  44
  45 static void     usage(void);
  46 static void     putppt(int);
  47 static int      getppt(const char *buf);
  48
  49 void
  50 usage(void)
  51 {
  52         fprintf(stderr, "usage: %s [string ...]\n", getprogname());
  53         fprintf(stderr, "usage: %s -d [-b]\n", getprogname());
  54         exit(1);
  55 }
  56
  57 int
  58 main(int argc, char **argv)
  59 {
  60         char *p, buf[132];
  61         int c, start, seenl, dflag, bflag;
  62
  63         /* revoke setgid privileges */
  64         setgid(getgid());
  65
  66         dflag = bflag = 0;
  67         while ((c = getopt(argc, argv, "bdh")) != -1)
  68                 switch(c) {
  69                 case 'd':
  70                         dflag = 1;
  71                         break;
  72                 case 'b':
  73                         bflag = 1;
  74                         break;
  75                 case 'h':
  76                 default:
  77                         usage();
  78                 }
  79         if (bflag && !dflag)
  80                 usage();
  81         argc -= optind;
  82         argv += optind;
  83
  84         if (dflag) {
  85                 if (argc > 0)
  86                         usage();
  87
  88                 seenl = start = 0;
  89                 while (fgets(buf, sizeof(buf), stdin) != NULL) {
  90                         c = getppt(buf);
  91                         if (c == -2)
  92                                 continue;
  93                         if (c == -1) {
  94                                 if (start)
  95                                         /* lost sync */
  96                                         putchar('x');
  97                                 continue;
  98                         }
  99                         start = 1;
 100                         if (bflag)
 101                                 putchar(c);
 102                         else {
 103                                 char vbuf[5];
 104                                 vis(vbuf, c, VIS_NOSLASH, 0);
 105                                 fputs(vbuf, stdout);
 106                         }
 107                         seenl = (c == '\n');
 108                 }
 109                 if (!feof(stdin))
 110                         err(1, "fgets");
 111                 if (!seenl && !bflag)
 112                         putchar('\n');
 113         } else {
 114                 puts(EDGE);
 115                 if (argc > 0)
 116                         while ((p = *argv++)) {
 117                                 for (; *p != '\0'; ++p)
 118                                         putppt((int)*p);
 119                                 if (*argv)
 120                                         putppt((int)' ');
 121                         }
 122                 else while ((c = getchar()) != EOF)
 123                         putppt(c);
 124                 puts(EDGE);
 125         }
 126         return 0;
 127 }
 128
 129 void
 130 putppt(int c)
 131 {
 132         int i;
 133
 134         putchar('|');
 135         for (i = 7; i >= 0; i--) {
 136                 if (i == 2)
 137                         putchar('.');   /* feed hole */
 138                 if ((c & (1 << i)) != 0)
 139                         putchar('o');
 140                 else
 141                         putchar(' ');
 142         }
 143         putchar('|');
 144         putchar('\n');
 145 }
 146
 147 int
 148 getppt(const char *buf)
 149 {
 150         int c;
 151
 152         /* Demand left-aligned paper tape, but allow comments to the right */
 153         if (strncmp(buf, EDGE, strlen(EDGE)) == 0)
 154             return (-2);
 155         if (strlen(buf) < 12 || buf[0] != '|' || buf[10] != '|' ||
 156             buf[6] != '.' || strspn(buf, "| o.") < 11)
 157                 return (-1);
 158
 159         c = 0;
 160         if (buf[1] != ' ')
 161                 c |= 0200;
 162         if (buf[2] != ' ')
 163                 c |= 0100;
 164         if (buf[3] != ' ')
 165                 c |= 0040;
 166         if (buf[4] != ' ')
 167                 c |= 0020;
 168         if (buf[5] != ' ')
 169                 c |= 0010;
 170         if (buf[7] != ' ')
 171                 c |= 0004;
 172         if (buf[8] != ' ')
 173                 c |= 0002;
 174         if (buf[9] != ' ')
 175                 c |= 0001;
 176
 177         return (c);
 178 }