release/src/router/libncurses/test/gdc.c

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  28 /*
  29  * Grand digital clock for curses compatible terminals
  30  * Usage: gdc [-s] [-t hh:mm:ss] [n] -- run for n seconds (default infinity)
  31  * Flags: -s: scroll
  32  *
  33  * modified 10-18-89 for curses (jrl)
  34  * 10-18-89 added signal handling
  35  *
  36  * $Id: gdc.c,v 1.44 2015/07/04 21:28:28 tom Exp $
  37  */
  38
  39 #include <test.priv.h>
  40
  41 #include <time.h>
  42
  43 #define YBASE   10
  44 #define XBASE   10
  45 #define XLENGTH 54
  46 #define YDEPTH  5
  47
  48 #define PAIR_DIGITS 1
  49 #define PAIR_OTHERS 2
  50 #define PAIR_FRAMES 3
  51
  52 static short disp[11] =
  53 {
  54     075557, 011111, 071747, 071717, 055711,
  55     074717, 074757, 071111, 075757, 075717, 002020
  56 };
  57 static long older[6], next[6], newer[6], mask;
  58
  59 static int sigtermed = 0;
  60 static bool redirected = FALSE;
  61 static bool hascolor = FALSE;
  62
  63 static void
  64 sighndl(int signo)
  65 {
  66     signal(signo, sighndl);
  67     sigtermed = signo;
  68     if (redirected) {
  69         endwin();
  70         ExitProgram(EXIT_FAILURE);
  71     }
  72 }
  73
  74 static void
  75 check_term(void)
  76 {
  77     if (sigtermed) {
  78         (void) standend();
  79         endwin();
  80         fprintf(stderr, "gdc terminated by signal %d\n", sigtermed);
  81         ExitProgram(EXIT_FAILURE);
  82     }
  83 }
  84
  85 static void
  86 drawbox(bool scrolling)
  87 {
  88     chtype bottom[XLENGTH + 1];
  89     int n;
  90
  91     if (hascolor)
  92         (void) attrset(AttrArg(COLOR_PAIR(PAIR_FRAMES), 0));
  93
  94     MvAddCh(YBASE - 1, XBASE - 1, ACS_ULCORNER);
  95     hline(ACS_HLINE, XLENGTH);
  96     MvAddCh(YBASE - 1, XBASE + XLENGTH, ACS_URCORNER);
  97
  98     MvAddCh(YBASE + YDEPTH, XBASE - 1, ACS_LLCORNER);
  99     if ((mvinchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH)) != ERR) {
 100         for (n = 0; n < XLENGTH; n++) {
 101             if (!scrolling)
 102                 bottom[n] &= ~A_COLOR;
 103             bottom[n] = ACS_HLINE | (bottom[n] & (A_ATTRIBUTES | A_COLOR));
 104         }
 105         (void) mvaddchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH);
 106     }
 107     MvAddCh(YBASE + YDEPTH, XBASE + XLENGTH, ACS_LRCORNER);
 108
 109     move(YBASE, XBASE - 1);
 110     vline(ACS_VLINE, YDEPTH);
 111
 112     move(YBASE, XBASE + XLENGTH);
 113     vline(ACS_VLINE, YDEPTH);
 114
 115     if (hascolor)
 116         (void) attrset(AttrArg(COLOR_PAIR(PAIR_OTHERS), 0));
 117 }
 118
 119 static void
 120 standt(int on)
 121 {
 122     if (on) {
 123         if (hascolor) {
 124             attron(COLOR_PAIR(PAIR_DIGITS));
 125         } else {
 126             attron(A_STANDOUT);
 127         }
 128     } else {
 129         if (hascolor) {
 130             attron(COLOR_PAIR(PAIR_OTHERS));
 131         } else {
 132             attroff(A_STANDOUT);
 133         }
 134     }
 135 }
 136
 137 static void
 138 set(int t, int n)
 139 {
 140     int i, m;
 141
 142     m = 7 << n;
 143     for (i = 0; i < 5; i++) {
 144         next[i] |= ((disp[t] >> ((4 - i) * 3)) & 07) << n;
 145         mask |= (next[i] ^ older[i]) & m;
 146     }
 147     if (mask & m)
 148         mask |= m;
 149 }
 150
 151 static void
 152 usage(void)
 153 {
 154     static const char *msg[] =
 155     {
 156         "Usage: gdc [options] [count]"
 157         ,""
 158         ,"Options:"
 159         ,"  -n  redirect input to /dev/null"
 160         ,"  -s  scroll each number into place, rather than flipping"
 161         ,"  -t hh:mm:ss specify starting time (default is ``now'')"
 162         ,""
 163         ,"If you specify a count, gdc runs for that number of seconds"
 164     };
 165     unsigned j;
 166     for (j = 0; j < SIZEOF(msg); j++)
 167         fprintf(stderr, "%s\n", msg[j]);
 168     ExitProgram(EXIT_FAILURE);
 169 }
 170
 171 static time_t
 172 parse_time(const char *value)
 173 {
 174     int hh, mm, ss;
 175     int check;
 176     time_t result;
 177     char c;
 178     struct tm *tm;
 179
 180     if (sscanf(value, "%d:%d:%d%c", &hh, &mm, &ss, &c) != 3) {
 181         if (sscanf(value, "%02d%02d%02d%c", &hh, &mm, &ss, &c) != 3) {
 182             usage();
 183         }
 184     }
 185
 186     if ((hh < 0) || (hh >= 24) ||
 187         (mm < 0) || (mm >= 60) ||
 188         (ss < 0) || (ss >= 60)) {
 189         usage();
 190     }
 191
 192     /* adjust so that the localtime in the main loop will give usable time */
 193     result = (hh * 3600) + ((mm * 60) + ss);
 194     for (check = 0; check < 24; ++check) {
 195         tm = localtime(&result);
 196         if (tm->tm_hour == hh)
 197             break;
 198         result += 3600;
 199     }
 200
 201     if (tm->tm_hour != hh) {
 202         fprintf(stderr, "Cannot find local time for %s!\n", value);
 203         usage();
 204     }
 205     return result;
 206 }
 207
 208 int
 209 main(int argc, char *argv[])
 210 {
 211     time_t now;
 212     struct tm *tm;
 213     long t, a;
 214     int i, j, s, k;
 215     int count = 0;
 216     FILE *ofp = stdout;
 217     FILE *ifp = stdin;
 218     bool smooth = FALSE;
 219     bool stages = FALSE;
 220     time_t starts = 0;
 221
 222     setlocale(LC_ALL, "");
 223
 224     CATCHALL(sighndl);
 225
 226     while ((k = getopt(argc, argv, "nst:")) != -1) {
 227         switch (k) {
 228         case 'n':
 229             ifp = fopen("/dev/null", "r");
 230             redirected = TRUE;
 231             break;
 232         case 's':
 233             smooth = TRUE;
 234             break;
 235         case 't':
 236             starts = parse_time(optarg);
 237             break;
 238         default:
 239             usage();
 240         }
 241     }
 242     if (optind < argc) {
 243         count = atoi(argv[optind++]);
 244         assert(count >= 0);
 245     }
 246     if (optind < argc)
 247         usage();
 248
 249     if (redirected) {
 250         char *name = getenv("TERM");
 251         if (name == 0
 252             || newterm(name, ofp, ifp) == 0) {
 253             fprintf(stderr, "cannot open terminal\n");
 254             ExitProgram(EXIT_FAILURE);
 255         }
 256
 257     } else {
 258         initscr();
 259     }
 260     cbreak();
 261     noecho();
 262     nodelay(stdscr, 1);
 263     curs_set(0);
 264
 265     hascolor = has_colors();
 266
 267     if (hascolor) {
 268         short bg = COLOR_BLACK;
 269         start_color();
 270 #if HAVE_USE_DEFAULT_COLORS
 271         if (use_default_colors() == OK)
 272             bg = -1;
 273 #endif
 274         init_pair(PAIR_DIGITS, COLOR_BLACK, COLOR_RED);
 275         init_pair(PAIR_OTHERS, COLOR_RED, bg);
 276         init_pair(PAIR_FRAMES, COLOR_WHITE, bg);
 277         (void) attrset(AttrArg(COLOR_PAIR(PAIR_OTHERS), 0));
 278     }
 279
 280   restart:
 281     for (j = 0; j < 5; j++)
 282         older[j] = newer[j] = next[j] = 0;
 283
 284     clear();
 285     drawbox(FALSE);
 286
 287     do {
 288         char buf[40];
 289
 290         if (starts != 0) {
 291             now = ++starts;
 292         } else {
 293             time(&now);
 294         }
 295         tm = localtime(&now);
 296
 297         mask = 0;
 298         set(tm->tm_sec % 10, 0);
 299         set(tm->tm_sec / 10, 4);
 300         set(tm->tm_min % 10, 10);
 301         set(tm->tm_min / 10, 14);
 302         set(tm->tm_hour % 10, 20);
 303         set(tm->tm_hour / 10, 24);
 304         set(10, 7);
 305         set(10, 17);
 306
 307         for (k = 0; k < 6; k++) {
 308             if (smooth) {
 309                 for (i = 0; i < 5; i++)
 310                     newer[i] = (newer[i] & ~mask) | (newer[i + 1] & mask);
 311                 newer[5] = (newer[5] & ~mask) | (next[k] & mask);
 312             } else {
 313                 newer[k] = (newer[k] & ~mask) | (next[k] & mask);
 314             }
 315             next[k] = 0;
 316             for (s = 1; s >= 0; s--) {
 317                 standt(s);
 318                 for (i = 0; i < 6; i++) {
 319                     if ((a = (newer[i] ^ older[i]) & (s ? newer : older)[i])
 320                         != 0) {
 321                         for (j = 0, t = 1 << 26; t; t >>= 1, j++) {
 322                             if (a & t) {
 323                                 if (!(a & (t << 1))) {
 324                                     move(YBASE + i, XBASE + 2 * j);
 325                                 }
 326                                 addstr("  ");
 327                             }
 328                         }
 329                     }
 330                     if (!s) {
 331                         older[i] = newer[i];
 332                     }
 333                 }
 334                 if (!s) {
 335                     if (smooth)
 336                         drawbox(TRUE);
 337                     refresh();
 338                     /*
 339                      * If we're scrolling, space out the refreshes to fake
 340                      * movement.  That's 7 frames, or 6 intervals, which would
 341                      * be 166 msec if we spread it out over a second.  It looks
 342                      * better (but will work on a slow terminal, e.g., less
 343                      * than 9600bd) to squeeze that into a half-second, and use
 344                      * half of 170 msec to ensure that the program doesn't eat
 345                      * a lot of time when asking what time it is, at the top of
 346                      * this loop -T.Dickey
 347                      */
 348                     if (smooth)
 349                         napms(85);
 350                     if (stages) {
 351                         stages = FALSE;
 352                         switch (wgetch(stdscr)) {
 353                         case 'q':
 354                             count = 1;
 355                             break;
 356                         case 'S':
 357                             stages = TRUE;
 358                             /* FALLTHRU */
 359                         case 's':
 360                             nodelay(stdscr, FALSE);
 361                             break;
 362                         case ' ':
 363                             nodelay(stdscr, TRUE);
 364                             break;
 365 #ifdef KEY_RESIZE
 366                         case KEY_RESIZE:
 367 #endif
 368                         case '?':
 369                             goto restart;
 370                         case ERR:
 371                             check_term();
 372                             /* FALLTHRU */
 373                         default:
 374                             continue;
 375                         }
 376                     }
 377                 }
 378             }
 379         }
 380
 381         /* this depends on the detailed format of ctime(3) */
 382         (void) strncpy(buf, ctime(&now), (size_t) 30);
 383         {
 384             char *d2 = buf + 10;
 385             char *s2 = buf + 19;
 386             while ((*d2++ = *s2++) != '\0') ;
 387         }
 388         MvAddStr(16, 30, buf);
 389
 390         move(6, 0);
 391         drawbox(FALSE);
 392         refresh();
 393
 394         /*
 395          * If we're not smooth-scrolling, wait 1000 msec (1 sec).  Use napms()
 396          * rather than sleep() because the latter does odd things on some
 397          * systems, e.g., suspending output as well.
 398          */
 399         if (smooth)
 400             napms(500);
 401         else
 402             napms(1000);
 403
 404         /*
 405          * This is a safe way to check if we're interrupted - making the signal
 406          * handler set a flag that we can check.  Since we're running
 407          * nodelay(), the wgetch() call returns immediately, and in particular
 408          * will return an error if interrupted.  This works only if we can
 409          * read from the input, of course.
 410          */
 411         stages = FALSE;
 412         switch (wgetch(stdscr)) {
 413         case 'q':
 414             count = 1;
 415             break;
 416         case 'S':
 417             stages = TRUE;
 418             /* FALLTHRU */
 419         case 's':
 420             nodelay(stdscr, FALSE);
 421             break;
 422         case ' ':
 423             nodelay(stdscr, TRUE);
 424             break;
 425 #ifdef KEY_RESIZE
 426         case KEY_RESIZE:
 427 #endif
 428         case '?':
 429             goto restart;
 430         case ERR:
 431             check_term();
 432             /* FALLTHRU */
 433         default:
 434             continue;
 435         }
 436     } while (--count);
 437     (void) standend();
 438     endwin();
 439     ExitProgram(EXIT_SUCCESS);
 440 }