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

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  28 /*
  29  * Grand digital clock for curses compatible terminals
  30  * Usage: gdc [-s] [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 1.34 2010/11/13 21:01:23 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 RETSIGTYPE
  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 drawbox(bool scrolling)
  76 {
  77     chtype bottom[XLENGTH + 1];
  78     int n;
  79
  80     if (hascolor)
  81         (void) attrset(COLOR_PAIR(PAIR_FRAMES));
  82
  83     MvAddCh(YBASE - 1, XBASE - 1, ACS_ULCORNER);
  84     hline(ACS_HLINE, XLENGTH);
  85     MvAddCh(YBASE - 1, XBASE + XLENGTH, ACS_URCORNER);
  86
  87     MvAddCh(YBASE + YDEPTH, XBASE - 1, ACS_LLCORNER);
  88     if ((mvinchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH)) != ERR) {
  89         for (n = 0; n < XLENGTH; n++) {
  90             if (!scrolling)
  91                 bottom[n] &= ~A_COLOR;
  92             bottom[n] = ACS_HLINE | (bottom[n] & (A_ATTRIBUTES | A_COLOR));
  93         }
  94         (void) mvaddchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH);
  95     }
  96     MvAddCh(YBASE + YDEPTH, XBASE + XLENGTH, ACS_LRCORNER);
  97
  98     move(YBASE, XBASE - 1);
  99     vline(ACS_VLINE, YDEPTH);
 100
 101     move(YBASE, XBASE + XLENGTH);
 102     vline(ACS_VLINE, YDEPTH);
 103
 104     if (hascolor)
 105         (void) attrset(COLOR_PAIR(PAIR_OTHERS));
 106 }
 107
 108 static void
 109 standt(int on)
 110 {
 111     if (on) {
 112         if (hascolor) {
 113             attron(COLOR_PAIR(PAIR_DIGITS));
 114         } else {
 115             attron(A_STANDOUT);
 116         }
 117     } else {
 118         if (hascolor) {
 119             attron(COLOR_PAIR(PAIR_OTHERS));
 120         } else {
 121             attroff(A_STANDOUT);
 122         }
 123     }
 124 }
 125
 126 static void
 127 set(int t, int n)
 128 {
 129     int i, m;
 130
 131     m = 7 << n;
 132     for (i = 0; i < 5; i++) {
 133         next[i] |= ((disp[t] >> ((4 - i) * 3)) & 07) << n;
 134         mask |= (next[i] ^ older[i]) & m;
 135     }
 136     if (mask & m)
 137         mask |= m;
 138 }
 139
 140 static void
 141 usage(void)
 142 {
 143     static const char *msg[] =
 144     {
 145         "Usage: gdc [options] [count]"
 146         ,""
 147         ,"Options:"
 148         ,"  -n  redirect input to /dev/null"
 149         ,"  -s  scroll each number into place, rather than flipping"
 150         ,""
 151         ,"If you specify a count, gdc runs for that number of seconds"
 152     };
 153     unsigned j;
 154     for (j = 0; j < SIZEOF(msg); j++)
 155         fprintf(stderr, "%s\n", msg[j]);
 156     ExitProgram(EXIT_FAILURE);
 157 }
 158
 159 int
 160 main(int argc, char *argv[])
 161 {
 162     time_t now;
 163     struct tm *tm;
 164     long t, a;
 165     int i, j, s, k;
 166     int count = 0;
 167     FILE *ofp = stdout;
 168     FILE *ifp = stdin;
 169     bool scrol = FALSE;
 170
 171     setlocale(LC_ALL, "");
 172
 173     CATCHALL(sighndl);
 174
 175     while ((k = getopt(argc, argv, "sn")) != -1) {
 176         switch (k) {
 177         case 's':
 178             scrol = TRUE;
 179             break;
 180         case 'n':
 181             ifp = fopen("/dev/null", "r");
 182             redirected = TRUE;
 183             break;
 184         default:
 185             usage();
 186         }
 187     }
 188     if (optind < argc) {
 189         count = atoi(argv[optind++]);
 190         assert(count >= 0);
 191     }
 192     if (optind < argc)
 193         usage();
 194
 195     if (redirected) {
 196         char *name = getenv("TERM");
 197         if (name == 0
 198             || newterm(name, ofp, ifp) == 0) {
 199             fprintf(stderr, "cannot open terminal\n");
 200             ExitProgram(EXIT_FAILURE);
 201         }
 202
 203     } else {
 204         initscr();
 205     }
 206     cbreak();
 207     noecho();
 208     nodelay(stdscr, 1);
 209     curs_set(0);
 210
 211     hascolor = has_colors();
 212
 213     if (hascolor) {
 214         short bg = COLOR_BLACK;
 215         start_color();
 216 #if HAVE_USE_DEFAULT_COLORS
 217         if (use_default_colors() == OK)
 218             bg = -1;
 219 #endif
 220         init_pair(PAIR_DIGITS, COLOR_BLACK, COLOR_RED);
 221         init_pair(PAIR_OTHERS, COLOR_RED, bg);
 222         init_pair(PAIR_FRAMES, COLOR_WHITE, bg);
 223         (void) attrset(COLOR_PAIR(PAIR_OTHERS));
 224     }
 225
 226   restart:
 227     for (j = 0; j < 5; j++)
 228         older[j] = newer[j] = next[j] = 0;
 229
 230     clear();
 231     drawbox(FALSE);
 232
 233     do {
 234         char buf[30];
 235
 236         time(&now);
 237         tm = localtime(&now);
 238
 239         mask = 0;
 240         set(tm->tm_sec % 10, 0);
 241         set(tm->tm_sec / 10, 4);
 242         set(tm->tm_min % 10, 10);
 243         set(tm->tm_min / 10, 14);
 244         set(tm->tm_hour % 10, 20);
 245         set(tm->tm_hour / 10, 24);
 246         set(10, 7);
 247         set(10, 17);
 248
 249         for (k = 0; k < 6; k++) {
 250             if (scrol) {
 251                 for (i = 0; i < 5; i++)
 252                     newer[i] = (newer[i] & ~mask) | (newer[i + 1] & mask);
 253                 newer[5] = (newer[5] & ~mask) | (next[k] & mask);
 254             } else
 255                 newer[k] = (newer[k] & ~mask) | (next[k] & mask);
 256             next[k] = 0;
 257             for (s = 1; s >= 0; s--) {
 258                 standt(s);
 259                 for (i = 0; i < 6; i++) {
 260                     if ((a = (newer[i] ^ older[i]) & (s ? newer : older)[i])
 261                         != 0) {
 262                         for (j = 0, t = 1 << 26; t; t >>= 1, j++) {
 263                             if (a & t) {
 264                                 if (!(a & (t << 1))) {
 265                                     move(YBASE + i, XBASE + 2 * j);
 266                                 }
 267                                 addstr("  ");
 268                             }
 269                         }
 270                     }
 271                     if (!s) {
 272                         older[i] = newer[i];
 273                     }
 274                 }
 275                 if (!s) {
 276                     if (scrol)
 277                         drawbox(TRUE);
 278                     refresh();
 279                     /*
 280                      * If we're scrolling, space out the refreshes to fake
 281                      * movement.  That's 7 frames, or 6 intervals, which would
 282                      * be 166 msec if we spread it out over a second.  It looks
 283                      * better (but will work on a slow terminal, e.g., less
 284                      * than 9600bd) to squeeze that into a half-second, and use
 285                      * half of 170 msec to ensure that the program doesn't eat
 286                      * a lot of time when asking what time it is, at the top of
 287                      * this loop -T.Dickey
 288                      */
 289                     if (scrol)
 290                         napms(85);
 291                 }
 292             }
 293         }
 294
 295         /* this depends on the detailed format of ctime(3) */
 296         (void) strcpy(buf, ctime(&now));
 297         (void) strcpy(buf + 10, buf + 19);
 298         MvAddStr(16, 30, buf);
 299
 300         move(6, 0);
 301         drawbox(FALSE);
 302         refresh();
 303
 304         /*
 305          * If we're not scrolling, wait 1000 msec (1 sec).  Use napms() rather
 306          * than sleep() because the latter does odd things on some systems,
 307          * e.g., suspending output as well.
 308          */
 309         if (scrol)
 310             napms(500);
 311         else
 312             napms(1000);
 313
 314         /*
 315          * This is a safe way to check if we're interrupted - making the signal
 316          * handler set a flag that we can check.  Since we're running
 317          * nodelay(), the wgetch() call returns immediately, and in particular
 318          * will return an error if interrupted.  This works only if we can
 319          * read from the input, of course.
 320          */
 321         switch (wgetch(stdscr)) {
 322         case 'q':
 323             count = 1;
 324             break;
 325         case 's':
 326             nodelay(stdscr, FALSE);
 327             break;
 328         case ' ':
 329             nodelay(stdscr, TRUE);
 330             break;
 331 #ifdef KEY_RESIZE
 332         case KEY_RESIZE:
 333 #endif
 334         case '?':
 335             goto restart;
 336         case ERR:
 337             if (sigtermed) {
 338                 (void) standend();
 339                 endwin();
 340                 fprintf(stderr, "gdc terminated by signal %d\n", sigtermed);
 341                 ExitProgram(EXIT_FAILURE);
 342             }
 343             /* FALLTHRU */
 344         default:
 345             continue;
 346         }
 347     } while (--count);
 348     (void) standend();
 349     endwin();
 350     ExitProgram(EXIT_SUCCESS);
 351 }