1 .\"       $NetBSD: life.c,v 1.6 2003/08/07 16:44:28 agc Exp $
2 .\"
3 .\" Copyright (c) 1980, 1993
4 .\"        The Regents of the University of California.  All rights reserved.
5 .\"
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7 .\" modification, are permitted provided that the following conditions
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10 .\"    notice, this list of conditions and the following disclaimer.
11 .\" 2. Redistributions in binary form must reproduce the above copyright
12 .\"    notice, this list of conditions and the following disclaimer in the
13 .\"    documentation and/or other materials provided with the distribution.
14 .\" 3. Neither the name of the University nor the names of its contributors
15 .\"    may be used to endorse or promote products derived from this software
16 .\"    without specific prior written permission.
17 .\"
18 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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23 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 .\" SUCH DAMAGE.
29 .\"
30 .\"       @(#)life.c          8.1 (Berkeley) 6/8/93
31 .\"
32 # include <curses.h>
33 # include <signal.h>
34 
35 /*
36  *        Run a life game.  This is a demonstration program for
37  * the Screen Updating section of the -lcurses cursor package.
38  */
39 
40 typedef struct lst_st {                           /* linked list element */
41           int                 y, x;               /* (y, x) position of piece */
42           struct lst_st       *next, *last;       /* doubly linked */
43 } LIST;
44 
45 LIST      *Head;                        /* head of linked list */
46 
47 int       die();
48 
49 main(ac, av)
50 int       ac;
51 char      *av[];
52 {
53           evalargs(ac, av);             /* evaluate arguments */
54 
55           initscr();                              /* initialize screen package */
56           signal(SIGINT, die);                    /* set to restore tty stats */
57           cbreak();                     /* set for char-by-char */
58           noecho();                     /*        input */
59           nonl();                                 /* for optimization */
60 
61           getstart();                             /* get starting position */
62           for (;;) {
63                     prboard();                    /* print out current board */
64                     update();           /* update board position */
65           }
66 }
67 
68 /*
69  * This is the routine which is called when rubout is hit.
70  * It resets the tty stats to their original values.  This
71  * is the normal way of leaving the program.
72  */
73 die()
74 {
75           signal(SIGINT, SIG_IGN);                /* ignore rubouts */
76           mvcur(0, COLS - 1, LINES - 1, 0);       /* go to bottom of screen */
77           endwin();                               /* set terminal to good state */
78           exit(0);
79 }
80 
81 /*
82  * Get the starting position from the user.  They keys u, i, o, j, l,
83  * m, ,, and . are used for moving their relative directions from the
84  * k key.  Thus, u move diagonally up to the left, , moves directly down,
85  * etc.  x places a piece at the current position, " " takes it away.
86  * The input can also be from a file.  The list is built after the
87  * board setup is ready.
88  */
89 getstart()
90 {
91           reg char  c;
92           reg int             x, y;
93           auto char buf[100];
94 
95           box(stdscr, '|', '_');                  /* box in the screen */
96           move(1, 1);                             /* move to upper left corner */
97 
98           for (;;) {
99                     refresh();                    /* print current position */
100                     if ((c = getch()) == 'q')
101                               break;
102                     switch (c) {
103                       case 'u':
104                       case 'i':
105                       case 'o':
106                       case 'j':
107                       case 'l':
108                       case 'm':
109                       case ',':
110                       case '.':
111                               adjustyx(c);
112                               break;
113                       case 'f':
114                               mvaddstr(0, 0, "File name: ");
115                               getstr(buf);
116                               readfile(buf);
117                               break;
118                       case 'x':
119                               addch('X');
120                               break;
121                       case ' ':
122                               addch(' ');
123                               break;
124                     }
125           }
126 
127           if (Head != NULL)                       /* start new list */
128                     dellist(Head);
129           Head = malloc(sizeof (LIST));
130 
131           /*
132            * loop through the screen looking for 'x's, and add a list
133            * element for each one
134            */
135           for (y = 1; y < LINES - 1; y++)
136                     for (x = 1; x < COLS - 1; x++) {
137                               move(y, x);
138                               if (inch() == 'x')
139                                         addlist(y, x);
140                     }
141 }
142 
143 /*
144  * Print out the current board position from the linked list
145  */
146 prboard() {
147 
148           reg LIST  *hp;
149 
150           erase();                      /* clear out last position */
151           box(stdscr, '|', '_');                  /* box in the screen */
152 
153           /*
154            * go through the list adding each piece to the newly
155            * blank board
156            */
157           for (hp = Head; hp; hp = hp->next)
158                     mvaddch(hp->y, hp->x, 'X');
159 
160           refresh();
161 }
162