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