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 <ncurses.h>
  19 #include <signal.h>
  20 #include <stdlib.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23
  24 #define YBASE   10
  25 #define XBASE   10
  26 #define XLENGTH 58
  27 #define YDEPTH  7
  28
  29 struct timespec now;
  30 struct tm *tm;
  31
  32 short disp[11] = {
  33         075557, 011111, 071747, 071717, 055711,
  34         074717, 074757, 071111, 075757, 075717, 002020
  35 };
  36 long old[6], next[6], new[6], mask;
  37
  38 volatile sig_atomic_t sigtermed;
  39
  40 int hascolor = 0;
  41
  42 void set(int, int);
  43 void standt(int);
  44 void movto(int, int);
  45 void sighndl(int);
  46 void usage(void);
  47
  48 void
  49 sighndl(int signo)
  50 {
  51         sigtermed=signo;
  52 }
  53
  54 int
  55 main(int argc, char *argv[])
  56 {
  57         struct timespec delay;
  58         time_t prev_sec;
  59         long t, a;
  60         int i, j, s, k;
  61         int n;
  62         int ch;
  63         int scrol;
  64         int t12;
  65
  66         t12 = scrol = 0;
  67
  68         while ((ch = getopt(argc, argv, "ts")) != -1)
  69         switch (ch) {
  70         case 's':
  71                 scrol = 1;
  72                 break;
  73         case 't':
  74                 t12 = 1;
  75                 break;
  76         case '?':
  77         default:
  78                 usage();
  79                 /* NOTREACHED */
  80         }
  81         argc -= optind;
  82         argv += optind;
  83
  84         if (argc > 1) {
  85                 usage();
  86                 /* NOTREACHED */
  87         }
  88
  89         if (argc > 0) {
  90                 n = atoi(*argv) + 1;
  91                 if (n < 1) {
  92                         warnx("number of seconds is out of range");
  93                         usage();
  94                         /* NOTREACHED */
  95                 }
  96         } else
  97                 n = 0;
  98
  99         initscr();
 100
 101         signal(SIGINT,sighndl);
 102         signal(SIGTERM,sighndl);
 103         signal(SIGHUP,sighndl);
 104
 105         cbreak();
 106         noecho();
 107         curs_set(0);
 108
 109         hascolor = has_colors();
 110
 111         if(hascolor) {
 112                 start_color();
 113                 init_pair(1, COLOR_BLACK, COLOR_RED);
 114                 init_pair(2, COLOR_RED, COLOR_BLACK);
 115                 init_pair(3, COLOR_WHITE, COLOR_BLACK);
 116                 attrset(COLOR_PAIR(2));
 117         }
 118
 119         clear();
 120         refresh();
 121
 122         if(hascolor) {
 123                 attrset(COLOR_PAIR(3));
 124
 125                 mvaddch(YBASE - 2,  XBASE - 3, ACS_ULCORNER);
 126                 hline(ACS_HLINE, XLENGTH);
 127                 mvaddch(YBASE - 2,  XBASE - 2 + XLENGTH, ACS_URCORNER);
 128
 129                 mvaddch(YBASE + YDEPTH - 1,  XBASE - 3, ACS_LLCORNER);
 130                 hline(ACS_HLINE, XLENGTH);
 131                 mvaddch(YBASE + YDEPTH - 1,  XBASE - 2 + XLENGTH, ACS_LRCORNER);
 132
 133                 move(YBASE - 1,  XBASE - 3);
 134                 vline(ACS_VLINE, YDEPTH);
 135
 136                 move(YBASE - 1,  XBASE - 2 + XLENGTH);
 137                 vline(ACS_VLINE, YDEPTH);
 138
 139                 attrset(COLOR_PAIR(2));
 140         }
 141         clock_gettime(CLOCK_REALTIME_FAST, &now);
 142         prev_sec = now.tv_sec;
 143         do {
 144                 mask = 0;
 145                 tm = localtime(&now.tv_sec);
 146                 set(tm->tm_sec%10, 0);
 147                 set(tm->tm_sec/10, 4);
 148                 set(tm->tm_min%10, 10);
 149                 set(tm->tm_min/10, 14);
 150
 151                 if (t12) {
 152                         if (tm->tm_hour > 12) {
 153                                 tm->tm_hour -= 12;
 154                                 mvaddstr(YBASE + 5, XBASE + 52, "PM");
 155                         } else {
 156                                 if (tm->tm_hour == 0)
 157                                         tm->tm_hour = 12;
 158
 159                                 mvaddstr(YBASE + 5, XBASE + 52, "AM");
 160                         }
 161                 }
 162
 163                 set(tm->tm_hour%10, 20);
 164                 set(tm->tm_hour/10, 24);
 165                 set(10, 7);
 166                 set(10, 17);
 167                 for(k=0; k<6; k++) {
 168                         if(scrol) {
 169                                 for(i=0; i<5; i++)
 170                                         new[i] = (new[i]&~mask) | (new[i+1]&mask);
 171                                 new[5] = (new[5]&~mask) | (next[k]&mask);
 172                         } else
 173                                 new[k] = (new[k]&~mask) | (next[k]&mask);
 174                         next[k] = 0;
 175                         for(s=1; s>=0; s--) {
 176                                 standt(s);
 177                                 for(i=0; i<6; i++) {
 178                                         if((a = (new[i]^old[i])&(s ? new : old)[i]) != 0) {
 179                                                 for(j=0,t=1<<26; t; t>>=1,j++) {
 180                                                         if(a&t) {
 181                                                                 if(!(a&(t<<1))) {
 182                                                                         movto(YBASE + i, XBASE + 2*j);
 183                                                                 }
 184                                                                 addstr("  ");
 185                                                         }
 186                                                 }
 187                                         }
 188                                         if(!s) {
 189                                                 old[i] = new[i];
 190                                         }
 191                                 }
 192                                 if(!s) {
 193                                         refresh();
 194                                 }
 195                         }
 196                 }
 197                 movto(6, 0);
 198                 refresh();
 199                 clock_gettime(CLOCK_REALTIME_FAST, &now);
 200                 if (now.tv_sec == prev_sec) {
 201                         if (delay.tv_nsec > 0) {
 202                                 delay.tv_sec = 0;
 203                                 delay.tv_nsec = 1000000000 - now.tv_nsec;
 204                         } else {
 205                                 delay.tv_sec = 1;
 206                                 delay.tv_nsec = 0;
 207                         }
 208                         nanosleep(&delay, NULL);
 209                         clock_gettime(CLOCK_REALTIME_FAST, &now);
 210                 }
 211                 n -= now.tv_sec - prev_sec;
 212                 prev_sec = now.tv_sec;
 213                 if (sigtermed) {
 214                         standend();
 215                         clear();
 216                         refresh();
 217                         endwin();
 218                         errx(1, "terminated by signal %d", (int)sigtermed);
 219                 }
 220         } while (n);
 221         standend();
 222         clear();
 223         refresh();
 224         endwin();
 225         return(0);
 226 }
 227
 228 void
 229 set(int t, int n)
 230 {
 231         int i, m;
 232
 233         m = 7<<n;
 234         for(i=0; i<5; i++) {
 235                 next[i] |= ((disp[t]>>(4-i)*3)&07)<<n;
 236                 mask |= (next[i]^old[i])&m;
 237         }
 238         if(mask&m)
 239                 mask |= m;
 240 }
 241
 242 void
 243 standt(int on)
 244 {
 245         if (on) {
 246                 if(hascolor) {
 247                         attron(COLOR_PAIR(1));
 248                 } else {
 249                         attron(A_STANDOUT);
 250                 }
 251         } else {
 252                 if(hascolor) {
 253                         attron(COLOR_PAIR(2));
 254                 } else {
 255                         attroff(A_STANDOUT);
 256                 }
 257         }
 258 }
 259
 260 void
 261 movto(int line, int col)
 262 {
 263         move(line, col);
 264 }
 265
 266 void
 267 usage(void)
 268 {
 269
 270         (void)fprintf(stderr, "usage: grdc [-st] [n]\n");
 271         exit(1);
 272 }