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

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  28 /*
  29
  30          @@@        @@@    @@@@@@@@@@     @@@@@@@@@@@    @@@@@@@@@@@@
  31          @@@        @@@   @@@@@@@@@@@@    @@@@@@@@@@@@   @@@@@@@@@@@@@
  32          @@@        @@@  @@@@      @@@@   @@@@           @@@@ @@@  @@@@
  33          @@@   @@   @@@  @@@        @@@   @@@            @@@  @@@   @@@
  34          @@@  @@@@  @@@  @@@        @@@   @@@            @@@  @@@   @@@
  35          @@@@ @@@@ @@@@  @@@        @@@   @@@            @@@  @@@   @@@
  36           @@@@@@@@@@@@   @@@@      @@@@   @@@            @@@  @@@   @@@
  37            @@@@  @@@@     @@@@@@@@@@@@    @@@            @@@  @@@   @@@
  38             @@    @@       @@@@@@@@@@     @@@            @@@  @@@   @@@
  39
  40                                  Eric P. Scott
  41                           Caltech High Energy Physics
  42                                  October, 1980
  43
  44                 Hacks to turn this into a test frame for cursor movement:
  45                         Eric S. Raymond <esr@snark.thyrsus.com>
  46                                 January, 1995
  47
  48                 July 1995 (esr): worms is now in living color! :-)
  49
  50 Options:
  51         -f                      fill screen with copies of 'WORM' at start.
  52         -l <n>                  set worm length
  53         -n <n>                  set number of worms
  54         -t                      make worms leave droppings
  55         -T <start> <end>        set trace interval
  56         -S                      set single-stepping during trace interval
  57         -N                      suppress cursor-movement optimization
  58
  59   This program makes a good torture-test for the ncurses cursor-optimization
  60   code.  You can use -T to set the worm move interval over which movement
  61   traces will be dumped.  The program stops and waits for one character of
  62   input at the beginning and end of the interval.
  63
  64   $Id: worm.c,v 1.60 2010/11/13 20:21:21 tom Exp $
  65 */
  66
  67 #include <test.priv.h>
  68
  69 #ifdef USE_PTHREADS
  70 #include <pthread.h>
  71 #endif
  72
  73 WANT_USE_WINDOW();
  74
  75 #define MAX_WORMS       40
  76 #define MAX_LENGTH      1024
  77
  78 static chtype flavor[] =
  79 {
  80     'O', '*', '#', '$', '%', '0', '@',
  81 };
  82 static const int xinc[] =
  83 {
  84     1, 1, 1, 0, -1, -1, -1, 0
  85 }, yinc[] =
  86 {
  87     -1, 0, 1, 1, 1, 0, -1, -1
  88 };
  89
  90 typedef struct worm {
  91     int orientation;
  92     int head;
  93     int *xpos;
  94     int *ypos;
  95     chtype attrs;
  96 #ifdef USE_PTHREADS
  97     pthread_t thread;
  98 #endif
  99 } WORM;
 100
 101 static unsigned long sequence = 0;
 102 static bool quitting = FALSE;
 103
 104 static WORM worm[MAX_WORMS];
 105 static int **refs;
 106 static int last_x, last_y;
 107
 108 static const char *field;
 109 static int length = 16, number = 3;
 110 static chtype trail = ' ';
 111
 112 static unsigned pending;
 113 #ifdef TRACE
 114 static int generation, trace_start, trace_end;
 115 #endif /* TRACE */
 116 /* *INDENT-OFF* */
 117 static const struct options {
 118     int nopts;
 119     int opts[3];
 120 } normal[8]={
 121     { 3, { 7, 0, 1 } },
 122     { 3, { 0, 1, 2 } },
 123     { 3, { 1, 2, 3 } },
 124     { 3, { 2, 3, 4 } },
 125     { 3, { 3, 4, 5 } },
 126     { 3, { 4, 5, 6 } },
 127     { 3, { 5, 6, 7 } },
 128     { 3, { 6, 7, 0 } }
 129 }, upper[8]={
 130     { 1, { 1, 0, 0 } },
 131     { 2, { 1, 2, 0 } },
 132     { 0, { 0, 0, 0 } },
 133     { 0, { 0, 0, 0 } },
 134     { 0, { 0, 0, 0 } },
 135     { 2, { 4, 5, 0 } },
 136     { 1, { 5, 0, 0 } },
 137     { 2, { 1, 5, 0 } }
 138 }, left[8]={
 139     { 0, { 0, 0, 0 } },
 140     { 0, { 0, 0, 0 } },
 141     { 0, { 0, 0, 0 } },
 142     { 2, { 2, 3, 0 } },
 143     { 1, { 3, 0, 0 } },
 144     { 2, { 3, 7, 0 } },
 145     { 1, { 7, 0, 0 } },
 146     { 2, { 7, 0, 0 } }
 147 }, right[8]={
 148     { 1, { 7, 0, 0 } },
 149     { 2, { 3, 7, 0 } },
 150     { 1, { 3, 0, 0 } },
 151     { 2, { 3, 4, 0 } },
 152     { 0, { 0, 0, 0 } },
 153     { 0, { 0, 0, 0 } },
 154     { 0, { 0, 0, 0 } },
 155     { 2, { 6, 7, 0 } }
 156 }, lower[8]={
 157     { 0, { 0, 0, 0 } },
 158     { 2, { 0, 1, 0 } },
 159     { 1, { 1, 0, 0 } },
 160     { 2, { 1, 5, 0 } },
 161     { 1, { 5, 0, 0 } },
 162     { 2, { 5, 6, 0 } },
 163     { 0, { 0, 0, 0 } },
 164     { 0, { 0, 0, 0 } }
 165 }, upleft[8]={
 166     { 0, { 0, 0, 0 } },
 167     { 0, { 0, 0, 0 } },
 168     { 0, { 0, 0, 0 } },
 169     { 0, { 0, 0, 0 } },
 170     { 0, { 0, 0, 0 } },
 171     { 1, { 3, 0, 0 } },
 172     { 2, { 1, 3, 0 } },
 173     { 1, { 1, 0, 0 } }
 174 }, upright[8]={
 175     { 2, { 3, 5, 0 } },
 176     { 1, { 3, 0, 0 } },
 177     { 0, { 0, 0, 0 } },
 178     { 0, { 0, 0, 0 } },
 179     { 0, { 0, 0, 0 } },
 180     { 0, { 0, 0, 0 } },
 181     { 0, { 0, 0, 0 } },
 182     { 1, { 5, 0, 0 } }
 183 }, lowleft[8]={
 184     { 3, { 7, 0, 1 } },
 185     { 0, { 0, 0, 0 } },
 186     { 0, { 0, 0, 0 } },
 187     { 1, { 1, 0, 0 } },
 188     { 2, { 1, 7, 0 } },
 189     { 1, { 7, 0, 0 } },
 190     { 0, { 0, 0, 0 } },
 191     { 0, { 0, 0, 0 } }
 192 }, lowright[8]={
 193     { 0, { 0, 0, 0 } },
 194     { 1, { 7, 0, 0 } },
 195     { 2, { 5, 7, 0 } },
 196     { 1, { 5, 0, 0 } },
 197     { 0, { 0, 0, 0 } },
 198     { 0, { 0, 0, 0 } },
 199     { 0, { 0, 0, 0 } },
 200     { 0, { 0, 0, 0 } }
 201 };
 202 /* *INDENT-ON* */
 203
 204 static void
 205 cleanup(void)
 206 {
 207     USING_WINDOW(stdscr, wrefresh);
 208     curs_set(1);
 209     endwin();
 210 }
 211
 212 static RETSIGTYPE
 213 onsig(int sig GCC_UNUSED)
 214 {
 215     cleanup();
 216     ExitProgram(EXIT_FAILURE);
 217 }
 218
 219 static double
 220 ranf(void)
 221 {
 222     long r = (rand() & 077777);
 223     return ((double) r / 32768.);
 224 }
 225
 226 static int
 227 draw_worm(WINDOW *win, void *data)
 228 {
 229     WORM *w = (WORM *) data;
 230     const struct options *op;
 231     unsigned mask = (unsigned) (~(1 << (w - worm)));
 232     chtype attrs = w->attrs | ((mask & pending) ? A_REVERSE : 0);
 233
 234     int x;
 235     int y;
 236     int h;
 237
 238     bool done = FALSE;
 239
 240     if ((x = w->xpos[h = w->head]) < 0) {
 241         wmove(win, y = w->ypos[h] = last_y, x = w->xpos[h] = 0);
 242         waddch(win, attrs);
 243         refs[y][x]++;
 244     } else {
 245         y = w->ypos[h];
 246     }
 247
 248     if (x > last_x)
 249         x = last_x;
 250     if (y > last_y)
 251         y = last_y;
 252
 253     if (++h == length)
 254         h = 0;
 255
 256     if (w->xpos[w->head = h] >= 0) {
 257         int x1, y1;
 258         x1 = w->xpos[h];
 259         y1 = w->ypos[h];
 260         if (y1 < LINES
 261             && x1 < COLS
 262             && --refs[y1][x1] == 0) {
 263             wmove(win, y1, x1);
 264             waddch(win, trail);
 265         }
 266     }
 267
 268     op = &(x == 0
 269            ? (y == 0
 270               ? upleft
 271               : (y == last_y
 272                  ? lowleft
 273                  : left))
 274            : (x == last_x
 275               ? (y == 0
 276                  ? upright
 277                  : (y == last_y
 278                     ? lowright
 279                     : right))
 280               : (y == 0
 281                  ? upper
 282                  : (y == last_y
 283                     ? lower
 284                     : normal))))[w->orientation];
 285
 286     switch (op->nopts) {
 287     case 0:
 288         done = TRUE;
 289         break;
 290     case 1:
 291         w->orientation = op->opts[0];
 292         break;
 293     default:
 294         w->orientation = op->opts[(int) (ranf() * (double) op->nopts)];
 295         break;
 296     }
 297
 298     if (!done) {
 299         x += xinc[w->orientation];
 300         y += yinc[w->orientation];
 301         wmove(win, y, x);
 302
 303         if (y < 0)
 304             y = 0;
 305         waddch(win, attrs);
 306
 307         w->ypos[h] = y;
 308         w->xpos[h] = x;
 309         refs[y][x]++;
 310     }
 311
 312     return done;
 313 }
 314
 315 #ifdef USE_PTHREADS
 316 static bool
 317 quit_worm(int bitnum)
 318 {
 319     pending |= (1 << bitnum);
 320     napms(10);                  /* let the other thread(s) have a chance */
 321     pending &= ~(1 << bitnum);
 322     return quitting;
 323 }
 324
 325 static void *
 326 start_worm(void *arg)
 327 {
 328     unsigned long compare = 0;
 329     Trace(("start_worm"));
 330     while (!quit_worm(((struct worm *) arg) - worm)) {
 331         while (compare < sequence) {
 332             ++compare;
 333 #if HAVE_USE_WINDOW
 334             use_window(stdscr, draw_worm, arg);
 335 #else
 336             draw_worm(stdscr, arg);
 337 #endif
 338         }
 339     }
 340     Trace(("...start_worm (done)"));
 341     return NULL;
 342 }
 343 #endif
 344
 345 static bool
 346 draw_all_worms(void)
 347 {
 348     bool done = FALSE;
 349     int n;
 350     struct worm *w;
 351
 352 #ifdef USE_PTHREADS
 353     static bool first = TRUE;
 354     if (first) {
 355         first = FALSE;
 356         for (n = 0, w = &worm[0]; n < number; n++, w++) {
 357             int rc;
 358             rc = pthread_create(&(w->thread), NULL, start_worm, w);
 359         }
 360     }
 361 #else
 362     for (n = 0, w = &worm[0]; n < number; n++, w++) {
 363         if (
 364 #if HAVE_USE_WINDOW
 365                USING_WINDOW2(stdscr, draw_worm, w)
 366 #else
 367                draw_worm(stdscr, w)
 368 #endif
 369             )
 370             done = TRUE;
 371     }
 372 #endif
 373     return done;
 374 }
 375
 376 static int
 377 get_input(void)
 378 {
 379     int ch;
 380     ch = USING_WINDOW(stdscr, wgetch);
 381     return ch;
 382 }
 383
 384 #ifdef KEY_RESIZE
 385 static int
 386 update_refs(WINDOW *win)
 387 {
 388     int x, y;
 389
 390     (void) win;
 391     if (last_x != COLS - 1) {
 392         for (y = 0; y <= last_y; y++) {
 393             refs[y] = typeRealloc(int, (size_t) COLS, refs[y]);
 394             for (x = last_x + 1; x < COLS; x++)
 395                 refs[y][x] = 0;
 396         }
 397         last_x = COLS - 1;
 398     }
 399     if (last_y != LINES - 1) {
 400         for (y = LINES; y <= last_y; y++)
 401             free(refs[y]);
 402         refs = typeRealloc(int *, (size_t) LINES, refs);
 403         for (y = last_y + 1; y < LINES; y++) {
 404             refs[y] = typeMalloc(int, (size_t) COLS);
 405             for (x = 0; x < COLS; x++)
 406                 refs[y][x] = 0;
 407         }
 408         last_y = LINES - 1;
 409     }
 410     return OK;
 411 }
 412 #endif
 413
 414 int
 415 main(int argc, char *argv[])
 416 {
 417     int x, y;
 418     int n;
 419     struct worm *w;
 420     int *ip;
 421     bool done = FALSE;
 422
 423     setlocale(LC_ALL, "");
 424
 425     for (x = 1; x < argc; x++) {
 426         char *p;
 427         p = argv[x];
 428         if (*p == '-')
 429             p++;
 430         switch (*p) {
 431         case 'f':
 432             field = "WORM";
 433             break;
 434         case 'l':
 435             if (++x == argc)
 436                 goto usage;
 437             if ((length = atoi(argv[x])) < 2 || length > MAX_LENGTH) {
 438                 fprintf(stderr, "%s: Invalid length\n", *argv);
 439                 ExitProgram(EXIT_FAILURE);
 440             }
 441             break;
 442         case 'n':
 443             if (++x == argc)
 444                 goto usage;
 445             if ((number = atoi(argv[x])) < 1 || number > MAX_WORMS) {
 446                 fprintf(stderr, "%s: Invalid number of worms\n", *argv);
 447                 ExitProgram(EXIT_FAILURE);
 448             }
 449             break;
 450         case 't':
 451             trail = '.';
 452             break;
 453 #ifdef TRACE
 454         case 'T':
 455             trace_start = atoi(argv[++x]);
 456             trace_end = atoi(argv[++x]);
 457             break;
 458         case 'N':
 459             _nc_optimize_enable ^= OPTIMIZE_ALL;        /* declared by ncurses */
 460             break;
 461 #endif /* TRACE */
 462         default:
 463           usage:
 464             fprintf(stderr,
 465                     "usage: %s [-field] [-length #] [-number #] [-trail]\n", *argv);
 466             ExitProgram(EXIT_FAILURE);
 467         }
 468     }
 469
 470     signal(SIGINT, onsig);
 471     initscr();
 472     noecho();
 473     cbreak();
 474     nonl();
 475
 476     curs_set(0);
 477
 478     last_y = LINES - 1;
 479     last_x = COLS - 1;
 480
 481 #ifdef A_COLOR
 482     if (has_colors()) {
 483         int bg = COLOR_BLACK;
 484         start_color();
 485 #if HAVE_USE_DEFAULT_COLORS
 486         if (use_default_colors() == OK)
 487             bg = -1;
 488 #endif
 489
 490 #define SET_COLOR(num, fg) \
 491             init_pair(num+1, (short) fg, (short) bg); \
 492             flavor[num] |= COLOR_PAIR(num+1) | A_BOLD
 493
 494         SET_COLOR(0, COLOR_GREEN);
 495         SET_COLOR(1, COLOR_RED);
 496         SET_COLOR(2, COLOR_CYAN);
 497         SET_COLOR(3, COLOR_WHITE);
 498         SET_COLOR(4, COLOR_MAGENTA);
 499         SET_COLOR(5, COLOR_BLUE);
 500         SET_COLOR(6, COLOR_YELLOW);
 501     }
 502 #endif /* A_COLOR */
 503
 504     refs = typeMalloc(int *, (size_t) LINES);
 505     for (y = 0; y < LINES; y++) {
 506         refs[y] = typeMalloc(int, (size_t) COLS);
 507         for (x = 0; x < COLS; x++) {
 508             refs[y][x] = 0;
 509         }
 510     }
 511
 512 #ifdef BADCORNER
 513     /* if addressing the lower right corner doesn't work in your curses */
 514     refs[last_y][last_x] = 1;
 515 #endif /* BADCORNER */
 516
 517     for (n = number, w = &worm[0]; --n >= 0; w++) {
 518         w->attrs = flavor[(unsigned) n % SIZEOF(flavor)];
 519         w->orientation = 0;
 520         w->head = 0;
 521
 522         if (!(ip = typeMalloc(int, (size_t) (length + 1)))) {
 523             fprintf(stderr, "%s: out of memory\n", *argv);
 524             ExitProgram(EXIT_FAILURE);
 525         }
 526         w->xpos = ip;
 527         for (x = length; --x >= 0;)
 528             *ip++ = -1;
 529         if (!(ip = typeMalloc(int, (size_t) (length + 1)))) {
 530             fprintf(stderr, "%s: out of memory\n", *argv);
 531             ExitProgram(EXIT_FAILURE);
 532         }
 533         w->ypos = ip;
 534         for (y = length; --y >= 0;)
 535             *ip++ = -1;
 536     }
 537     if (field) {
 538         const char *p;
 539         p = field;
 540         for (y = last_y; --y >= 0;) {
 541             for (x = COLS; --x >= 0;) {
 542                 addch((chtype) (*p++));
 543                 if (!*p)
 544                     p = field;
 545             }
 546         }
 547     }
 548     USING_WINDOW(stdscr, wrefresh);
 549     nodelay(stdscr, TRUE);
 550
 551     while (!done) {
 552         int ch;
 553
 554         ++sequence;
 555         if ((ch = get_input()) > 0) {
 556 #ifdef TRACE
 557             if (trace_start || trace_end) {
 558                 if (generation == trace_start) {
 559                     trace(TRACE_CALLS);
 560                     get_input();
 561                 } else if (generation == trace_end) {
 562                     trace(0);
 563                     get_input();
 564                 }
 565
 566                 generation++;
 567             }
 568 #endif
 569
 570 #ifdef KEY_RESIZE
 571             if (ch == KEY_RESIZE) {
 572                 USING_WINDOW(stdscr, update_refs);
 573             }
 574 #endif
 575
 576             /*
 577              * Make it simple to put this into single-step mode, or resume
 578              * normal operation -T.Dickey
 579              */
 580             if (ch == 'q') {
 581                 quitting = TRUE;
 582                 done = TRUE;
 583                 continue;
 584             } else if (ch == 's') {
 585                 nodelay(stdscr, FALSE);
 586             } else if (ch == ' ') {
 587                 nodelay(stdscr, TRUE);
 588             }
 589         }
 590
 591         done = draw_all_worms();
 592         napms(10);
 593         USING_WINDOW(stdscr, wrefresh);
 594     }
 595
 596     Trace(("Cleanup"));
 597     cleanup();
 598 #ifdef NO_LEAKS
 599     for (y = 0; y < LINES; y++) {
 600         free(refs[y]);
 601     }
 602     free(refs);
 603     for (n = number, w = &worm[0]; --n >= 0; w++) {
 604         free(w->xpos);
 605         free(w->ypos);
 606     }
 607 #endif
 608 #ifdef USE_PTHREADS
 609     /*
 610      * Do this just in case one of the threads did not really exit.
 611      */
 612     Trace(("join all threads"));
 613     for (n = 0; n < number; n++) {
 614         pthread_join(worm[n].thread, NULL);
 615     }
 616 #endif
 617     ExitProgram(EXIT_SUCCESS);
 618 }