games/grdc/grdc.c

   1 /*
   2  * Grand digital clock for curses compatible terminals
   3  * Usage: grdc [-st] [n]   -- run for n seconds (default infinity)
   4  * Flags: -s: scroll
   5  *        -t: output time in 12-hour format
   6  *
   7  *
   8  * modified 10-18-89 for curses (jrl)
   9  * 10-18-89 added signal handling
  10  *
  11  * modified 03-25-03 for 12 hour option
  12  *     - Samy Al Bahra <samy@kerneled.com>
  13  *
  14  * $FreeBSD$
  15  */
  16
  17 #include <err.h>
  18 #include <time.h>
  19 #include <signal.h>
  20 #include <ncurses.h>
  21 #include <stdlib.h>
  22 #ifndef NONPOSIX
  23 #include <unistd.h>
  24 #endif
  25
  26 #define YBASE   10
  27 #define XBASE   10
  28 #define XLENGTH 58
  29 #define YDEPTH  7
  30
  31 /* it won't be */
  32 time_t now; /* yeah! */
  33 struct tm *tm;
  34
  35 short disp[11] = {
  36         075557, 011111, 071747, 071717, 055711,
  37         074717, 074757, 071111, 075757, 075717, 002020
  38 };
  39 long old[6], next[6], new[6], mask;
  40
  41 volatile sig_atomic_t sigtermed;
  42
  43 int hascolor = 0;
  44
  45 void set(int, int);
  46 void standt(int);
  47 void movto(int, int);
  48 void sighndl(int);
  49 void usage(void);
  50
  51 void sighndl(signo)
  52 int signo;
  53 {
  54         sigtermed=signo;
  55 }
  56
  57 int
  58 main(argc, argv)
  59 int argc;
  60 char **argv;
  61 {
  62 long t, a;
  63 int i, j, s, k;
  64 int n;
  65 int ch;
  66 int scrol;
  67 int t12;
  68
  69         t12 = scrol = 0;
  70
  71         while ((ch = getopt(argc, argv, "ts")) != -1)
  72         switch (ch) {
  73         case 's':
  74                 scrol = 1;
  75                 break;
  76         case 't':
  77                 t12 = 1;
  78                 break;
  79         case '?':
  80         default:
  81                 usage();
  82                 /* NOTREACHED */
  83         }
  84         argc -= optind;
  85         argv += optind;
  86
  87         if (argc > 1) {
  88                 usage();
  89                 /* NOTREACHED */
  90         }
  91
  92         if (argc > 0)
  93                 n = atoi(*argv);
  94         else
  95                 n = 0;
  96
  97         initscr();
  98
  99         signal(SIGINT,sighndl);
 100         signal(SIGTERM,sighndl);
 101         signal(SIGHUP,sighndl);
 102
 103         cbreak();
 104         noecho();
 105         curs_set(0);
 106
 107         hascolor = has_colors();
 108
 109         if(hascolor) {
 110                 start_color();
 111                 init_pair(1, COLOR_BLACK, COLOR_RED);
 112                 init_pair(2, COLOR_RED, COLOR_BLACK);
 113                 init_pair(3, COLOR_WHITE, COLOR_BLACK);
 114                 attrset(COLOR_PAIR(2));
 115         }
 116
 117         clear();
 118         refresh();
 119
 120         if(hascolor) {
 121                 attrset(COLOR_PAIR(3));
 122
 123                 mvaddch(YBASE - 2,  XBASE - 3, ACS_ULCORNER);
 124                 hline(ACS_HLINE, XLENGTH);
 125                 mvaddch(YBASE - 2,  XBASE - 2 + XLENGTH, ACS_URCORNER);
 126
 127                 mvaddch(YBASE + YDEPTH - 1,  XBASE - 3, ACS_LLCORNER);
 128                 hline(ACS_HLINE, XLENGTH);
 129                 mvaddch(YBASE + YDEPTH - 1,  XBASE - 2 + XLENGTH, ACS_LRCORNER);
 130
 131                 move(YBASE - 1,  XBASE - 3);
 132                 vline(ACS_VLINE, YDEPTH);
 133
 134                 move(YBASE - 1,  XBASE - 2 + XLENGTH);
 135                 vline(ACS_VLINE, YDEPTH);
 136
 137                 attrset(COLOR_PAIR(2));
 138         }
 139         do {
 140                 mask = 0;
 141                 time(&now);
 142                 tm = localtime(&now);
 143                 set(tm->tm_sec%10, 0);
 144                 set(tm->tm_sec/10, 4);
 145                 set(tm->tm_min%10, 10);
 146                 set(tm->tm_min/10, 14);
 147
 148                 if (t12) {
 149                         if (tm->tm_hour > 12) {
 150                                 tm->tm_hour -= 12;
 151                                 mvaddstr(YBASE + 5, XBASE + 52, "PM");
 152                         } else {
 153                                 if (tm->tm_hour == 0)
 154                                         tm->tm_hour = 12;
 155
 156                                 mvaddstr(YBASE + 5, XBASE + 52, "AM");
 157                         }
 158                 }
 159
 160                 set(tm->tm_hour%10, 20);
 161                 set(tm->tm_hour/10, 24);
 162                 set(10, 7);
 163                 set(10, 17);
 164                 for(k=0; k<6; k++) {
 165                         if(scrol) {
 166                                 for(i=0; i<5; i++)
 167                                         new[i] = (new[i]&~mask) | (new[i+1]&mask);
 168                                 new[5] = (new[5]&~mask) | (next[k]&mask);
 169                         } else
 170                                 new[k] = (new[k]&~mask) | (next[k]&mask);
 171                         next[k] = 0;
 172                         for(s=1; s>=0; s--) {
 173                                 standt(s);
 174                                 for(i=0; i<6; i++) {
 175                                         if((a = (new[i]^old[i])&(s ? new : old)[i]) != 0) {
 176                                                 for(j=0,t=1<<26; t; t>>=1,j++) {
 177                                                         if(a&t) {
 178                                                                 if(!(a&(t<<1))) {
 179                                                                         movto(YBASE + i, XBASE + 2*j);
 180                                                                 }
 181                                                                 addstr("  ");
 182                                                         }
 183                                                 }
 184                                         }
 185                                         if(!s) {
 186                                                 old[i] = new[i];
 187                                         }
 188                                 }
 189                                 if(!s) {
 190                                         refresh();
 191                                 }
 192                         }
 193                 }
 194                 movto(6, 0);
 195                 refresh();
 196                 sleep(1);
 197                 if (sigtermed) {
 198                         standend();
 199                         clear();
 200                         refresh();
 201                         endwin();
 202                         errx(1, "terminated by signal %d", (int)sigtermed);
 203                 }
 204         } while(--n);
 205         standend();
 206         clear();
 207         refresh();
 208         endwin();
 209         return(0);
 210 }
 211
 212 void
 213 set(int t, int n)
 214 {
 215 int i, m;
 216
 217         m = 7<<n;
 218         for(i=0; i<5; i++) {
 219                 next[i] |= ((disp[t]>>(4-i)*3)&07)<<n;
 220                 mask |= (next[i]^old[i])&m;
 221         }
 222         if(mask&m)
 223                 mask |= m;
 224 }
 225
 226 void
 227 standt(int on)
 228 {
 229         if (on) {
 230                 if(hascolor) {
 231                         attron(COLOR_PAIR(1));
 232                 } else {
 233                         attron(A_STANDOUT);
 234                 }
 235         } else {
 236                 if(hascolor) {
 237                         attron(COLOR_PAIR(2));
 238                 } else {
 239                         attroff(A_STANDOUT);
 240                 }
 241         }
 242 }
 243
 244 void
 245 movto(int line, int col)
 246 {
 247         move(line, col);
 248 }
 249
 250 void
 251 usage(void)
 252 {
 253
 254         (void)fprintf(stderr, "usage: grdc [-st] [n]\n");
 255         exit(1);
 256 }