projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c8df485c KM |
1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef lint | |
| df5a607f | 8 | static char sccsid[] = "@(#)twinkle2.c 6.1 (Berkeley) %G%"; |
| c8df485c KM |
9 | #endif not lint |
| 10 | ||
| df5a607f | 11 | extern int _putchar(); |
| c8df485c | 12 | |
| df5a607f KM |
13 | main() |
| 14 | { | |
| c8df485c | 15 | reg char *sp; |
| c8df485c KM |
16 | |
| 17 | srand(getpid()); /* initialize random sequence */ | |
| 18 | ||
| 19 | if (isatty(0)) { | |
| 20 | gettmode(); | |
| df5a607f | 21 | if ((sp = getenv("TERM")) != NULL) |
| c8df485c KM |
22 | setterm(sp); |
| 23 | signal(SIGINT, die); | |
| 24 | } | |
| 25 | else { | |
| 26 | printf("Need a terminal on %d\n", _tty_ch); | |
| 27 | exit(1); | |
| 28 | } | |
| 29 | _puts(TI); | |
| 30 | _puts(VS); | |
| 31 | ||
| 32 | noecho(); | |
| 33 | nonl(); | |
| 34 | tputs(CL, NLINES, _putchar); | |
| 35 | for (;;) { | |
| 36 | makeboard(); /* make the board setup */ | |
| 37 | puton('*'); /* put on '*'s */ | |
| 38 | puton(' '); /* cover up with ' 's */ | |
| 39 | } | |
| 40 | } | |
| 41 | ||
| c8df485c | 42 | puton(ch) |
| df5a607f KM |
43 | char ch; |
| 44 | { | |
| c8df485c KM |
45 | reg LOCS *lp; |
| 46 | reg int r; | |
| 47 | reg LOCS *end; | |
| 48 | LOCS temp; | |
| df5a607f | 49 | static int lasty, lastx; |
| c8df485c KM |
50 | |
| 51 | end = &Layout[Numstars]; | |
| 52 | for (lp = Layout; lp < end; lp++) { | |
| 53 | r = rand() % Numstars; | |
| 54 | temp = *lp; | |
| 55 | *lp = Layout[r]; | |
| 56 | Layout[r] = temp; | |
| 57 | } | |
| 58 | ||
| 59 | for (lp = Layout; lp < end; lp++) | |
| 60 | /* prevent scrolling */ | |
| 61 | if (!AM || (lp->y < NLINES - 1 || lp->x < NCOLS - 1)) { | |
| 62 | mvcur(lasty, lastx, lp->y, lp->x); | |
| 63 | putchar(ch); | |
| 64 | lasty = lp->y; | |
| 65 | if ((lastx = lp->x + 1) >= NCOLS) | |
| 66 | if (AM) { | |
| 67 | lastx = 0; | |
| 68 | lasty++; | |
| 69 | } | |
| 70 | else | |
| 71 | lastx = NCOLS - 1; | |
| 72 | } | |
| 73 | } |