BSD 2 development

[unix-history] / src / tod.c

/* Copyright (c) 1979 Regents of the University of California */
/*
* Print out a meaningful phrase depending on the time of
* day.
*
* Author: Robert Toxen (UCB) 7/10/78
*/

/*
* The following structure parameterizes the
* whole she-bang.
*/

struct daytime {
       int     d_start;                /* starting hour */
       char    *d_mesg;                /* applicable message */
} daytime[] {
       0,      "It's late",
       4,      "You really should be home in bed",
       7,      "Good morning",
       12,     "Good afternoon",
       18,     "Good evening",
       22,     "Good night",
       50,     "panic: time of day bug",
       -1,     0
};

/*
* The special case structure:  if the hour is exactly
* one of these, print the corresponding message.
*/

struct special {
       int     s_time;                 /* Applicable hour */
       char    *s_mesg;                /* Corresponding mesg */
} special[] {
       12,     "Had lunch yet?",
       17,     "You should be eating dinner",
       0,      "It's past midnight",
       -1,     0
};

main(argc, argv)
       char **argv;
{
       register struct daytime *dp;
       register struct special *sp;
       register int hour;
       int tv[2], *t;

       if (argc > 1)
               hour = atoi(argv[1]);
       else {
               time(tv);
               t = localtime(tv);
               hour = t[2];
       }
       for (sp = &special[0]; sp->s_time != -1; sp++)
               if (sp->s_time == hour) {
                       printf("%s\n", sp->s_mesg);
                       exit(1);
               }
       for (dp = &daytime[0]; dp->d_start != -1; dp++)
               if (hour < (dp+1)->d_start) {
                       printf("%s\n", dp->d_mesg);
                       exit(0);
               }

       /*
        * Why didn't this thing print anything !?!
        */

       printf("No message for time!?!\n");
       abort();
}