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[unix-history] / usr / src / games / morse / morse.c

/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)morse.c     5.1 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>
#include <ctype.h>

static char
       *digit[] = {
       "-----",
       ".----",
       "..---",
       "...--",
       "....-",
       ".....",
       "-....",
       "--...",
       "---..",
       "----.",
},
       *alph[] = {
       ".-",
       "-...",
       "-.-.",
       "-..",
       ".",
       "..-.",
       "--.",
       "....",
       "..",
       ".---",
       "-.-",
       ".-..",
       "--",
       "-.",
       "---",
       ".--.",
       "--.-",
       ".-.",
       "...",
       "-",
       "..-",
       "...-",
       ".--",
       "-..-",
       "-.--",
       "--..",
};

static int sflag;

main(argc, argv)
       int argc;
       char **argv;
{
       extern char *optarg;
       extern int optind;
       register int ch;
       register char *p;

       while ((ch = getopt(argc, argv, "s")) != EOF)
               switch((char)ch) {
               case 's':
                       sflag = 1;
                       break;
               case '?':
               default:
                       fprintf(stderr, "usage: morse [string ...]");
                       exit(1);
               }
       argc -= optind;
       argv += optind;

       if (*argv)
               do {
                       for (p = *argv; *p; ++p)
                               morse((int)*p);
               } while (*++argv);
       else while ((ch = getchar()) != EOF)
               morse(ch);
}

static
morse(c)
       register int c;
{
       if (isalpha(c))
               show(alph[c - (isupper(c) ? 'A' : 'a')]);
       else if (isdigit(c))
               show(digit[c - '0']);
       else if (c == ',')
               show("--..--");
       else if (c == '.')
               show(".-.-.-");
       else if (isspace(c))
               show(" ...\n");
}

static
show(s)
       register char *s;
{
       if (sflag)
               printf(" %s", s);
       else for (; *s; ++s)
               printf(" %s", *s == '.' ? "dit" : "daw");
       printf(",\n");
}