games/bcd/bcd.c

   1 /*-
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Steve Hayman of the Indiana University Computer Science Dept.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#) Copyright (c) 1989, 1993 The Regents of the University of California.  All rights reserved.
  33  * @(#)bcd.c    8.2 (Berkeley) 3/20/94
  34  * $FreeBSD: src/games/bcd/bcd.c,v 1.8 1999/11/30 03:48:41 billf Exp $
  35  * $DragonFly: src/games/bcd/bcd.c,v 1.3 2005/08/03 13:26:19 eirikn Exp $
  36  */
  37
  38 /*
  39  * bcd --
  40  *
  41  * Read one line of standard input and produce something that looks like a
  42  * punch card.  An attempt to reimplement /usr/games/bcd.  All I looked at
  43  * was the man page.
  44  *
  45  * I couldn't find a BCD table handy so I wrote a shell script to deduce what
  46  * the patterns were that the old bcd was using for each possible 8-bit
  47  * character.  These are the results -- the low order 12 bits represent the
  48  * holes.  (A 1 bit is a hole.)  These may be wrong, but they match the old
  49  * program!
  50  *
  51  * Steve Hayman
  52  * sahayman@iuvax.cs.indiana.edu
  53  * 1989 11 30
  54  *
  55  *
  56  * I found an error in the table. The same error is found in the SunOS 4.1.1
  57  * version of bcd. It has apparently been around a long time. The error caused
  58  * 'Q' and 'R' to have the same punch code. I only noticed the error due to
  59  * someone pointing it out to me when the program was used to print a cover
  60  * for an APA!  The table was wrong in 4 places. The other error was masked
  61  * by the fact that the input is converted to upper case before lookup.
  62  *
  63  * Dyane Bruce
  64  * db@diana.ocunix.on.ca
  65  * Nov 5, 1993
  66  */
  67
  68 #include <sys/types.h>
  69
  70 #include <stdio.h>
  71 #include <string.h>
  72 #include <ctype.h>
  73 #include <unistd.h>
  74
  75 u_short holes[256] = {
  76     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  77     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  78     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  79     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  80     0x0,         0x206,   0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,
  81     0x812,       0x412,   0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,
  82     0x200,       0x100,   0x080,   0x040,   0x020,   0x010,   0x008,   0x004,
  83     0x002,       0x001,   0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,
  84     0x022,       0x900,   0x880,   0x840,   0x820,   0x810,   0x808,   0x804,
  85     0x802,       0x801,   0x500,   0x480,   0x440,   0x420,   0x410,   0x408,
  86     0x404,       0x402,   0x401,   0x280,   0x240,   0x220,   0x210,   0x208,
  87     0x204,       0x202,   0x201,   0x082,   0x822,   0x600,   0x282,   0x30f,
  88     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
  89     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
  90     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
  91     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0,
  92     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  93     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  94     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  95     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
  96     0x206,       0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,   0x812,
  97     0x412,       0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,   0x200,
  98     0x100,       0x080,   0x040,   0x020,   0x010,   0x008,   0x004,   0x002,
  99     0x001,       0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,   0x022,
 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,   0x30f,
 104     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 105     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 106     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 107     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0
 108 };
 109
 110 /*
 111  * i'th bit of w.
 112  */
 113 #define bit(w,i)        ((w)&(1<<(i)))
 114
 115 static void printcard(char *);
 116
 117 int
 118 main(int argc, char **argv)
 119 {
 120         char cardline[80];
 121
 122         /* revoke setgid privileges */
 123         setgid(getgid());
 124
 125         /*
 126          * The original bcd prompts with a "%" when reading from stdin,
 127          * but this seems kind of silly.  So this one doesn't.
 128          */
 129
 130         if (argc > 1) {
 131                 while (--argc)
 132                         printcard(*++argv);
 133         } else
 134                 while (fgets(cardline, sizeof(cardline), stdin))
 135                         printcard(cardline);
 136         return (0);
 137 }
 138
 139 #define COLUMNS 48
 140
 141 static void
 142 printcard(char *str)
 143 {
 144         static char rowchars[] = "   123456789";
 145         int i, row;
 146         char *p;
 147
 148         /* ruthlessly remove newlines and truncate at 48 characters. */
 149         if ((p = index(str, '\n')))
 150                 *p = '\0';
 151
 152         if (strlen(str) > COLUMNS)
 153                 str[COLUMNS] = '\0';
 154
 155         /* make string upper case. */
 156         for (p = str; *p; ++p)
 157                 if (isascii(*p) && islower(*p))
 158                         *p = toupper(*p);
 159
 160          /* top of card */
 161         putchar(' ');
 162         for (i = 1; i <= COLUMNS; ++i)
 163                 putchar('_');
 164         putchar('\n');
 165
 166         /*
 167          * line of text.  Leave a blank if the character doesn't have
 168          * a hole pattern.
 169          */
 170         p = str;
 171         putchar('/');
 172         for (i = 1; *p; i++, p++)
 173                 if (holes[(int)*p])
 174                         putchar(*p);
 175                 else
 176                         putchar(' ');
 177         while (i++ <= COLUMNS)
 178                 putchar(' ');
 179         putchar('|');
 180         putchar('\n');
 181
 182         /*
 183          * 12 rows of potential holes; output a ']', which looks kind of
 184          * like a hole, if the appropriate bit is set in the holes[] table.
 185          * The original bcd output a '[', a backspace, five control A's,
 186          * and then a ']'.  This seems a little excessive.
 187          */
 188         for (row = 0; row <= 11; ++row) {
 189                 putchar('|');
 190                 for (i = 0, p = str; *p; i++, p++) {
 191                         if (bit(holes[(int)*p], 11 - row))
 192                                 putchar(']');
 193                         else
 194                                 putchar(rowchars[row]);
 195                 }
 196                 while (i++ < COLUMNS)
 197                         putchar(rowchars[row]);
 198                 putchar('|');
 199                 putchar('\n');
 200         }
 201
 202         /* bottom of card */
 203         putchar('|');
 204         for (i = 1; i <= COLUMNS; i++)
 205                 putchar('_');
 206         putchar('|');
 207         putchar('\n');
 208 }