Commit | Line | Data |
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8a230b74 KA |
1 | # include <curses.h> |
2 | # include <signal.h> | |
3 | ||
4 | /* | |
5 | * Run a life game. This is a demonstration program for | |
6 | * the Screen Updating section of the -lcurses cursor package. | |
7 | */ | |
8 | ||
9 | struct lst_st { /* linked list element */ | |
10 | int y, x; /* (y, x) position of piece */ | |
11 | struct lst_st *next, *last; /* doubly linked */ | |
12 | }; | |
13 | ||
14 | typedef struct lst_st LIST; | |
15 | ||
16 | LIST *Head; /* head of linked list */ | |
17 | ||
18 | main(ac, av) | |
19 | int ac; | |
20 | char *av[]; { | |
21 | ||
22 | int die(); | |
23 | ||
24 | evalargs(ac, av); /* evaluate arguments */ | |
25 | ||
26 | initscr(); /* initialize screen package */ | |
27 | signal(SIGINT, die); /* set to restore tty stats */ | |
28 | crmode(); /* set for char-by-char */ | |
29 | noecho(); /* input */ | |
30 | nonl(); /* for optimization */ | |
31 | ||
32 | getstart(); /* get starting position */ | |
33 | for (;;) { | |
34 | prboard(); /* print out current board */ | |
35 | update(); /* update board position */ | |
36 | } | |
37 | } | |
38 | ||
39 | /* | |
40 | * This is the routine which is called when rubout is hit. | |
41 | * It resets the tty stats to their original values. This | |
42 | * is the normal way of leaving the program. | |
43 | */ | |
44 | die() { | |
45 | ||
46 | signal(SIGINT, SIG_IGN); /* ignore rubouts */ | |
47 | mvcur(0, COLS-1, LINES-1, 0); /* go to bottom of screen */ | |
48 | endwin(); /* set terminal to initial state */ | |
49 | exit(0); | |
50 | } | |
51 | ||
52 | /* | |
53 | * Get the starting position from the user. They keys u, i, o, j, l, | |
54 | * m, ,, and . are used for moving their relative directions from the | |
55 | * k key. Thus, u move diagonally up to the left, , moves directly down, | |
56 | * etc. x places a piece at the current position, " " takes it away. | |
57 | * The input can also be from a file. The list is built after the | |
58 | * board setup is ready. | |
59 | */ | |
60 | getstart() { | |
61 | ||
62 | reg char c; | |
63 | reg int x, y; | |
64 | ||
65 | box(stdscr, '|', '_'); /* box in the screen */ | |
66 | move(1, 1); /* move to upper left corner */ | |
67 | ||
68 | do { | |
69 | refresh(); /* print current position */ | |
70 | if ((c=getch()) == 'q') | |
71 | break; | |
72 | switch (c) { | |
73 | case 'u': | |
74 | case 'i': | |
75 | case 'o': | |
76 | case 'j': | |
77 | case 'l': | |
78 | case 'm': | |
79 | case ',': | |
80 | case '.': | |
81 | adjustyx(c); | |
82 | break; | |
83 | case 'f': | |
84 | mvaddstr(0, 0, "File name: "); | |
85 | getstr(buf); | |
86 | readfile(buf); | |
87 | break; | |
88 | case 'x': | |
89 | addch('X'); | |
90 | break; | |
91 | case ' ': | |
92 | addch(' '); | |
93 | break; | |
94 | } | |
95 | } | |
96 | ||
97 | if (Head != NULL) /* start new list */ | |
98 | dellist(Head); | |
99 | Head = malloc(sizeof (LIST)); | |
100 | ||
101 | /* | |
102 | * loop through the screen looking for 'x's, and add a list | |
103 | * element for each one | |
104 | */ | |
105 | for (y = 1; y < LINES - 1; y++) | |
106 | for (x = 1; x < COLS - 1; x++) { | |
107 | move(y, x); | |
108 | if (inch() == 'x') | |
109 | addlist(y, x); | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * Print out the current board position from the linked list | |
115 | */ | |
116 | prboard() { | |
117 | ||
118 | reg LIST *hp; | |
119 | ||
120 | erase(); /* clear out last position */ | |
121 | box(stdscr, '|', '_'); /* box in the screen */ | |
122 | ||
123 | /* | |
124 | * go through the list adding each piece to the newly | |
125 | * blank board | |
126 | */ | |
127 | for (hp = Head; hp; hp = hp->next) | |
128 | mvaddch(hp->y, hp->x, 'X'); | |
129 | ||
130 | refresh(); | |
131 | } |