games/bcd/bcd.c

   1 /*      $NetBSD: bcd.c,v 1.17 2009/08/12 05:21:28 dholland Exp $        */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Steve Hayman of the Indiana University Computer Science Dept.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993\
  38  The Regents of the University of California.  All rights reserved.");
  39 #endif /* not lint */
  40
  41 #ifndef lint
  42 #if 0
  43 static char sccsid[] = "@(#)bcd.c       8.2 (Berkeley) 3/20/94";
  44 #else
  45 __RCSID("$NetBSD: bcd.c,v 1.17 2009/08/12 05:21:28 dholland Exp $");
  46 #endif
  47 #endif /* not lint */
  48
  49 /*
  50  * bcd --
  51  *
  52  * Read one line of standard input and produce something that looks like a
  53  * punch card.  An attempt to reimplement /usr/games/bcd.  All I looked at
  54  * was the man page.
  55  *
  56  * I couldn't find a BCD table handy so I wrote a shell script to deduce what
  57  * the patterns were that the old bcd was using for each possible 8-bit
  58  * character.  These are the results -- the low order 12 bits represent the
  59  * holes.  (A 1 bit is a hole.)  These may be wrong, but they match the old
  60  * program!
  61  *
  62  * Steve Hayman
  63  * sahayman@iuvax.cs.indiana.edu
  64  * 1989 11 30
  65  *
  66  *
  67  * I found an error in the table. The same error is found in the SunOS 4.1.1
  68  * version of bcd. It has apparently been around a long time. The error caused
  69  * 'Q' and 'R' to have the same punch code. I only noticed the error due to
  70  * someone pointing it out to me when the program was used to print a cover
  71  * for an APA!  The table was wrong in 4 places. The other error was masked
  72  * by the fact that the input is converted to upper case before lookup.
  73  *
  74  * Dyane Bruce
  75  * db@diana.ocunix.on.ca
  76  * Nov 5, 1993
  77  */
  78
  79 #include <sys/types.h>
  80
  81 #include <stdio.h>
  82 #include <stdlib.h>
  83 #include <string.h>
  84 #include <ctype.h>
  85 #include <unistd.h>
  86
  87 static const u_short holes[256] = {
  88     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  89     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  90     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  91     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  92     0x0,         0x206,   0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,
  93     0x812,       0x412,   0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,
  94     0x200,       0x100,   0x080,   0x040,   0x020,   0x010,   0x008,   0x004,
  95     0x002,       0x001,   0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,
  96     0x022,       0x900,   0x880,   0x840,   0x820,   0x810,   0x808,   0x804,
  97     0x802,       0x801,   0x500,   0x480,   0x440,   0x420,   0x410,   0x408,
  98     0x404,       0x402,   0x401,   0x280,   0x240,   0x220,   0x210,   0x208,
  99     0x204,       0x202,   0x201,   0x082,   0x822,   0x600,   0x282,   0x30f,
 100     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 101     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 102     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 103     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0,
 104     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 105     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 106     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 107     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 108     0x206,       0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,   0x812,
 109     0x412,       0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,   0x200,
 110     0x100,       0x080,   0x040,   0x020,   0x010,   0x008,   0x004,   0x002,
 111     0x001,       0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,   0x022,
 112     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 113     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 114     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 115     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x30f,
 116     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 117     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 118     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 119     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0
 120 };
 121
 122 /*
 123  * i'th bit of w.
 124  */
 125 #define bit(w,i)        ((w)&(1<<(i)))
 126
 127 static void printcard(char *);
 128
 129 int
 130 main(int argc, char **argv)
 131 {
 132         char cardline[80];
 133
 134         /* revoke setgid privileges */
 135         setgid(getgid());
 136
 137         /*
 138          * The original bcd prompts with a "%" when reading from stdin,
 139          * but this seems kind of silly.  So this one doesn't.
 140          */
 141
 142         if (argc > 1) {
 143                 while (--argc)
 144                         printcard(*++argv);
 145         } else
 146                 while (fgets(cardline, sizeof(cardline), stdin))
 147                         printcard(cardline);
 148         exit(0);
 149 }
 150
 151 #define COLUMNS 48
 152
 153 static void
 154 printcard(char *str)
 155 {
 156         static const char rowchars[] = "   123456789";
 157         int i, row;
 158         char *p;
 159
 160         /* ruthlessly remove newlines and truncate at 48 characters. */
 161         if ((p = strchr(str, '\n')))
 162                 *p = '\0';
 163
 164         if (strlen(str) > COLUMNS)
 165                 str[COLUMNS] = '\0';
 166
 167         /* make string upper case. */
 168         for (p = str; *p; ++p)
 169                 if (isascii((unsigned char)*p) && islower((unsigned char)*p))
 170                         *p = toupper((unsigned char) *p);
 171
 172          /* top of card */
 173         putchar(' ');
 174         for (i = 1; i <= COLUMNS; ++i)
 175                 putchar('_');
 176         putchar('\n');
 177
 178         /*
 179          * line of text.  Leave a blank if the character doesn't have
 180          * a hole pattern.
 181          */
 182         p = str;
 183         putchar('/');
 184         for (i = 1; *p; i++, p++)
 185                 if (holes[(unsigned char)*p])
 186                         putchar(*p);
 187                 else
 188                         putchar(' ');
 189         while (i++ <= COLUMNS)
 190                 putchar(' ');
 191         putchar('|');
 192         putchar('\n');
 193
 194         /*
 195          * 12 rows of potential holes; output a ']', which looks kind of
 196          * like a hole, if the appropriate bit is set in the holes[] table.
 197          * The original bcd output a '[', a backspace, five control A's,
 198          * and then a ']'.  This seems a little excessive.
 199          */
 200         for (row = 0; row <= 11; ++row) {
 201                 putchar('|');
 202                 for (i = 0, p = str; *p; i++, p++) {
 203                         if (bit(holes[(unsigned char)*p], 11 - row))
 204                                 putchar(']');
 205                         else
 206                                 putchar(rowchars[row]);
 207                 }
 208                 while (i++ < COLUMNS)
 209                         putchar(rowchars[row]);
 210                 putchar('|');
 211                 putchar('\n');
 212         }
 213
 214         /* bottom of card */
 215         putchar('|');
 216         for (i = 1; i <= COLUMNS; i++)
 217                 putchar('_');
 218         putchar('|');
 219         putchar('\n');
 220 }