bcd/bcd.c

   1 /*      $NetBSD: bcd.c,v 1.9 1999/07/28 02:12:33 hubertf 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. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 __COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
  42         The Regents of the University of California.  All rights reserved.\n");
  43 #endif /* not lint */
  44
  45 #ifndef lint
  46 #if 0
  47 static char sccsid[] = "@(#)bcd.c       8.2 (Berkeley) 3/20/94";
  48 #else
  49 __RCSID("$NetBSD: bcd.c,v 1.9 1999/07/28 02:12:33 hubertf Exp $");
  50 #endif
  51 #endif /* not lint */
  52
  53 /*
  54  * bcd --
  55  *
  56  * Read one line of standard input and produce something that looks like a
  57  * punch card.  An attempt to reimplement /usr/games/bcd.  All I looked at
  58  * was the man page.
  59  *
  60  * I couldn't find a BCD table handy so I wrote a shell script to deduce what
  61  * the patterns were that the old bcd was using for each possible 8-bit
  62  * character.  These are the results -- the low order 12 bits represent the
  63  * holes.  (A 1 bit is a hole.)  These may be wrong, but they match the old
  64  * program!
  65  *
  66  * Steve Hayman
  67  * sahayman@iuvax.cs.indiana.edu
  68  * 1989 11 30
  69  *
  70  *
  71  * I found an error in the table. The same error is found in the SunOS 4.1.1
  72  * version of bcd. It has apparently been around a long time. The error caused
  73  * 'Q' and 'R' to have the same punch code. I only noticed the error due to
  74  * someone pointing it out to me when the program was used to print a cover
  75  * for an APA!  The table was wrong in 4 places. The other error was masked
  76  * by the fact that the input is converted to upper case before lookup.
  77  *
  78  * Dyane Bruce
  79  * db@diana.ocunix.on.ca
  80  * Nov 5, 1993
  81  */
  82
  83 #include <sys/types.h>
  84
  85 #include <stdio.h>
  86 #include <string.h>
  87 #include <ctype.h>
  88 #include <unistd.h>
  89
  90 const u_short holes[256] = {
  91     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     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,         0x206,   0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,
  96     0x812,       0x412,   0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,
  97     0x200,       0x100,   0x080,   0x040,   0x020,   0x010,   0x008,   0x004,
  98     0x002,       0x001,   0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,
  99     0x022,       0x900,   0x880,   0x840,   0x820,   0x810,   0x808,   0x804,
 100     0x802,       0x801,   0x500,   0x480,   0x440,   0x420,   0x410,   0x408,
 101     0x404,       0x402,   0x401,   0x280,   0x240,   0x220,   0x210,   0x208,
 102     0x204,       0x202,   0x201,   0x082,   0x822,   0x600,   0x282,   0x30f,
 103     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 104     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 105     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 106     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0,
 107     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 108     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 109     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 110     0x0,         0x0,     0x0,     0x0,     0x0,     0x0,     0x0,     0x0,
 111     0x206,       0x20a,   0x042,   0x442,   0x222,   0x800,   0x406,   0x812,
 112     0x412,       0x422,   0xa00,   0x242,   0x400,   0x842,   0x300,   0x200,
 113     0x100,       0x080,   0x040,   0x020,   0x010,   0x008,   0x004,   0x002,
 114     0x001,       0x012,   0x40a,   0x80a,   0x212,   0x00a,   0x006,   0x022,
 115     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 116     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 117     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 118     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x30f,
 119     0x900,       0x880,   0x840,   0x820,   0x810,   0x808,   0x804,   0x802,
 120     0x801,       0x500,   0x480,   0x440,   0x420,   0x410,   0x408,   0x404,
 121     0x402,       0x401,   0x280,   0x240,   0x220,   0x210,   0x208,   0x204,
 122     0x202,       0x201,   0x082,   0x806,   0x822,   0x600,   0x282,   0x0
 123 };
 124
 125 /*
 126  * i'th bit of w.
 127  */
 128 #define bit(w,i)        ((w)&(1<<(i)))
 129
 130 int     main __P((int, char *[]));
 131 void    printcard __P((char *));
 132
 133 int
 134 main(argc, argv)
 135         int argc;
 136         char **argv;
 137 {
 138         char cardline[80];
 139
 140         /* revoke setgid privileges */
 141         setregid(getgid(), getgid());
 142
 143         /*
 144          * The original bcd prompts with a "%" when reading from stdin,
 145          * but this seems kind of silly.  So this one doesn't.
 146          */
 147
 148         if (argc > 1) {
 149                 while (--argc)
 150                         printcard(*++argv);
 151         } else
 152                 while (fgets(cardline, sizeof(cardline), stdin))
 153                         printcard(cardline);
 154         exit(0);
 155 }
 156
 157 #define COLUMNS 48
 158
 159 void
 160 printcard(str)
 161         char *str;
 162 {
 163         static const char rowchars[] = "   123456789";
 164         int i, row;
 165         unsigned char *p;
 166
 167         /* ruthlessly remove newlines and truncate at 48 characters. */
 168         if ((p = strchr(str, '\n')))
 169                 *p = '\0';
 170
 171         if (strlen(str) > COLUMNS)
 172                 str[COLUMNS] = '\0';
 173
 174         /* make string upper case. */
 175         for (p = str; *p; ++p)
 176                 if (isascii(*p) && islower(*p))
 177                         *p = toupper(*p);
 178
 179          /* top of card */
 180         putchar(' ');
 181         for (i = 1; i <= COLUMNS; ++i)
 182                 putchar('_');
 183         putchar('\n');
 184
 185         /*
 186          * line of text.  Leave a blank if the character doesn't have
 187          * a hole pattern.
 188          */
 189         p = str;
 190         putchar('/');
 191         for (i = 1; *p; i++, p++)
 192                 if (holes[(int)*p])
 193                         putchar(*p);
 194                 else
 195                         putchar(' ');
 196         while (i++ <= COLUMNS)
 197                 putchar(' ');
 198         putchar('|');
 199         putchar('\n');
 200
 201         /*
 202          * 12 rows of potential holes; output a ']', which looks kind of
 203          * like a hole, if the appropriate bit is set in the holes[] table.
 204          * The original bcd output a '[', a backspace, five control A's,
 205          * and then a ']'.  This seems a little excessive.
 206          */
 207         for (row = 0; row <= 11; ++row) {
 208                 putchar('|');
 209                 for (i = 0, p = str; *p; i++, p++) {
 210                         if (bit(holes[(int)*p], 11 - row))
 211                                 putchar(']');
 212                         else
 213                                 putchar(rowchars[row]);
 214                 }
 215                 while (i++ < COLUMNS)
 216                         putchar(rowchars[row]);
 217                 putchar('|');
 218                 putchar('\n');
 219         }
 220
 221         /* bottom of card */
 222         putchar('|');
 223         for (i = 1; i <= COLUMNS; i++)
 224                 putchar('_');
 225         putchar('|');
 226         putchar('\n');
 227 }