[unix-history] / share / doc / ps1 / 18.curses / life.c

.\" Copyright (c) 1980 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"	from: @(#)life.c	6.3 (Berkeley) 4/17/91
.\"	life.c,v 1.2 1993/08/01 18:23:17 mycroft Exp
.\"
# include	<curses.h>
# include	<signal.h>

/*
 *	Run a life game.  This is a demonstration program for
 * the Screen Updating section of the -lcurses cursor package.
 */

typedef struct lst_st {			/* linked list element */
	int		y, x;		/* (y, x) position of piece */
	struct lst_st	*next, *last;	/* doubly linked */
} LIST;

LIST	*Head;			/* head of linked list */

int	die();

main(ac, av)
int	ac;
char	*av[];
{
	evalargs(ac, av);		/* evaluate arguments */

	initscr();			/* initialize screen package */
	signal(SIGINT, die);		/* set to restore tty stats */
	cbreak();			/* set for char-by-char */
	noecho();			/*	input */
	nonl();				/* for optimization */

	getstart();			/* get starting position */
	for (;;) {
		prboard();		/* print out current board */
		update();		/* update board position */
	}
}

/*
 * This is the routine which is called when rubout is hit.
 * It resets the tty stats to their original values.  This
 * is the normal way of leaving the program.
 */
die()
{
	signal(SIGINT, SIG_IGN);		/* ignore rubouts */
	mvcur(0, COLS - 1, LINES - 1, 0);	/* go to bottom of screen */
	endwin();				/* set terminal to good state */
	exit(0);
}

/*
 * Get the starting position from the user.  They keys u, i, o, j, l,
 * m, ,, and . are used for moving their relative directions from the
 * k key.  Thus, u move diagonally up to the left, , moves directly down,
 * etc.  x places a piece at the current position, " " takes it away.
 * The input can also be from a file.  The list is built after the
 * board setup is ready.
 */
getstart()
{
	reg char	c;
	reg int		x, y;
	auto char	buf[100];

	box(stdscr, '|', '_');		/* box in the screen */
	move(1, 1);			/* move to upper left corner */

	for (;;) {
		refresh();		/* print current position */
		if ((c = getch()) == 'q')
			break;
		switch (c) {
		  case 'u':
		  case 'i':
		  case 'o':
		  case 'j':
		  case 'l':
		  case 'm':
		  case ',':
		  case '.':
			adjustyx(c);
			break;
		  case 'f':
			mvaddstr(0, 0, "File name: ");
			getstr(buf);
			readfile(buf);
			break;
		  case 'x':
			addch('X');
			break;
		  case ' ':
			addch(' ');
			break;
		}
	}

	if (Head != NULL)			/* start new list */
		dellist(Head);
	Head = malloc(sizeof (LIST)); 

	/*
	 * loop through the screen looking for 'x's, and add a list
	 * element for each one
	 */
	for (y = 1; y < LINES - 1; y++)
		for (x = 1; x < COLS - 1; x++) {
			move(y, x);
			if (inch() == 'x')
				addlist(y, x);
		}
}

/*
 * Print out the current board position from the linked list
 */
prboard() {

	reg LIST	*hp;

	erase();			/* clear out last position */
	box(stdscr, '|', '_');		/* box in the screen */

	/*
	 * go through the list adding each piece to the newly
	 * blank board
	 */
	for (hp = Head; hp; hp = hp->next)
		mvaddch(hp->y, hp->x, 'X');

	refresh();
}
Commit	Line	Data
15637ed4 RG	1	.\" Copyright (c) 1980 The Regents of the University of California.
	2	.\" All rights reserved.
	3	.\"
	4	.\" Redistribution and use in source and binary forms, with or without
	5	.\" modification, are permitted provided that the following conditions
	6	.\" are met:
	7	.\" 1. Redistributions of source code must retain the above copyright
	8	.\" notice, this list of conditions and the following disclaimer.
	9	.\" 2. Redistributions in binary form must reproduce the above copyright
	10	.\" notice, this list of conditions and the following disclaimer in the
	11	.\" documentation and/or other materials provided with the distribution.
	12	.\" 3. All advertising materials mentioning features or use of this software
	13	.\" must display the following acknowledgement:
	14	.\" This product includes software developed by the University of
	15	.\" California, Berkeley and its contributors.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
	19	.\"
	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
78ed81a3	32	.\" from: @(#)life.c 6.3 (Berkeley) 4/17/91
78ed81a3	33	.\" life.c,v 1.2 1993/08/01 18:23:17 mycroft Exp
15637ed4 RG	34	.\"
	35	# include <curses.h>
	36	# include <signal.h>
	37
	38	/*
	39	* Run a life game. This is a demonstration program for
	40	* the Screen Updating section of the -lcurses cursor package.
	41	*/
	42
	43	typedef struct lst_st { /* linked list element */
	44	int y, x; /* (y, x) position of piece */
	45	struct lst_st next, last; /* doubly linked */
	46	} LIST;
	47
	48	LIST Head; / head of linked list */
	49
	50	int die();
	51
	52	main(ac, av)
	53	int ac;
	54	char *av[];
	55	{
	56	evalargs(ac, av); /* evaluate arguments */
	57
	58	initscr(); /* initialize screen package */
	59	signal(SIGINT, die); /* set to restore tty stats */
	60	cbreak(); /* set for char-by-char */
	61	noecho(); /* input */
	62	nonl(); /* for optimization */
	63
	64	getstart(); /* get starting position */
	65	for (;;) {
	66	prboard(); /* print out current board */
	67	update(); /* update board position */
	68	}
	69	}
	70
	71	/*
	72	* This is the routine which is called when rubout is hit.
	73	* It resets the tty stats to their original values. This
	74	* is the normal way of leaving the program.
	75	*/
	76	die()
	77	{
	78	signal(SIGINT, SIG_IGN); /* ignore rubouts */
	79	mvcur(0, COLS - 1, LINES - 1, 0); /* go to bottom of screen */
	80	endwin(); /* set terminal to good state */
	81	exit(0);
	82	}
	83
	84	/*
	85	* Get the starting position from the user. They keys u, i, o, j, l,
	86	* m, ,, and . are used for moving their relative directions from the
	87	* k key. Thus, u move diagonally up to the left, , moves directly down,
	88	* etc. x places a piece at the current position, " " takes it away.
	89	* The input can also be from a file. The list is built after the
	90	* board setup is ready.
	91	*/
	92	getstart()
	93	{
	94	reg char c;
	95	reg int x, y;
	96	auto char buf[100];
	97
98	box(stdscr, '\|', '_'); /* box in the screen */
99	move(1, 1); /* move to upper left corner */
100
101	for (;;) {
102	refresh(); /* print current position */
103	if ((c = getch()) == 'q')
104	break;
105	switch (c) {
106	case 'u':
107	case 'i':
108	case 'o':
109	case 'j':
110	case 'l':
111	case 'm':
112	case ',':
113	case '.':
114	adjustyx(c);
115	break;
116	case 'f':
117	mvaddstr(0, 0, "File name: ");
118	getstr(buf);
119	readfile(buf);
120	break;
121	case 'x':
122	addch('X');
123	break;
124	case ' ':
125	addch(' ');
126	break;
127	}
128	}
129
130	if (Head != NULL) /* start new list */
131	dellist(Head);
132	Head = malloc(sizeof (LIST));
133
134	/*
135	* loop through the screen looking for 'x's, and add a list
136	* element for each one
137	*/
138	for (y = 1; y < LINES - 1; y++)
139	for (x = 1; x < COLS - 1; x++) {
140	move(y, x);
141	if (inch() == 'x')
142	addlist(y, x);
143	}
144	}
145
146	/*
147	* Print out the current board position from the linked list
148	*/
149	prboard() {
150
151	reg LIST *hp;
152
153	erase(); /* clear out last position */
154	box(stdscr, '\|', '_'); /* box in the screen */
155
156	/*
157	* go through the list adding each piece to the newly
158	* blank board
159	*/
160	for (hp = Head; hp; hp = hp->next)
161	mvaddch(hp->y, hp->x, 'X');
162
163	refresh();
164	}