mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-12-22 14:30:29 +00:00
158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
.\" Copyright (c) 1980, 1993
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)twinkle1.c 8.1 (Berkeley) 6/8/93
|
|
.\"
|
|
# include <curses.h>
|
|
# include <signal.h>
|
|
|
|
/*
|
|
* the idea for this program was a product of the imagination of
|
|
* Kurt Schoens. Not responsible for minds lost or stolen.
|
|
*/
|
|
|
|
# define NCOLS 80
|
|
# define NLINES 24
|
|
# define MAXPATTERNS 4
|
|
|
|
typedef struct {
|
|
int y, x;
|
|
} LOCS;
|
|
|
|
LOCS Layout[NCOLS * NLINES]; /* current board layout */
|
|
|
|
int Pattern, /* current pattern number */
|
|
Numstars; /* number of stars in pattern */
|
|
|
|
char *getenv();
|
|
|
|
int die();
|
|
|
|
main()
|
|
{
|
|
srand(getpid()); /* initialize random sequence */
|
|
|
|
initscr();
|
|
signal(SIGINT, die);
|
|
noecho();
|
|
nonl();
|
|
leaveok(stdscr, TRUE);
|
|
scrollok(stdscr, FALSE);
|
|
|
|
for (;;) {
|
|
makeboard(); /* make the board setup */
|
|
puton('*'); /* put on '*'s */
|
|
puton(' '); /* cover up with ' 's */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* On program exit, move the cursor to the lower left corner by
|
|
* direct addressing, since current location is not guaranteed.
|
|
* We lie and say we used to be at the upper right corner to guarantee
|
|
* absolute addressing.
|
|
*/
|
|
die()
|
|
{
|
|
signal(SIGINT, SIG_IGN);
|
|
mvcur(0, COLS - 1, LINES - 1, 0);
|
|
endwin();
|
|
exit(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Make the current board setup. It picks a random pattern and
|
|
* calls ison() to determine if the character is on that pattern
|
|
* or not.
|
|
*/
|
|
makeboard()
|
|
{
|
|
reg int y, x;
|
|
reg LOCS *lp;
|
|
|
|
Pattern = rand() % MAXPATTERNS;
|
|
lp = Layout;
|
|
for (y = 0; y < NLINES; y++)
|
|
for (x = 0; x < NCOLS; x++)
|
|
if (ison(y, x)) {
|
|
lp->y = y;
|
|
lp->x = x;
|
|
lp++;
|
|
}
|
|
Numstars = lp - Layout;
|
|
}
|
|
|
|
/*
|
|
* Return TRUE if (y, x) is on the current pattern.
|
|
*/
|
|
ison(y, x)
|
|
reg int y, x; {
|
|
|
|
switch (Pattern) {
|
|
case 0: /* alternating lines */
|
|
return !(y & 01);
|
|
case 1: /* box */
|
|
if (x >= LINES && y >= NCOLS)
|
|
return FALSE;
|
|
if (y < 3 || y >= NLINES - 3)
|
|
return TRUE;
|
|
return (x < 3 || x >= NCOLS - 3);
|
|
case 2: /* holy pattern! */
|
|
return ((x + y) & 01);
|
|
case 3: /* bar across center */
|
|
return (y >= 9 && y <= 15);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
puton(ch)
|
|
reg char ch;
|
|
{
|
|
reg LOCS *lp;
|
|
reg int r;
|
|
reg LOCS *end;
|
|
LOCS temp;
|
|
|
|
end = &Layout[Numstars];
|
|
for (lp = Layout; lp < end; lp++) {
|
|
r = rand() % Numstars;
|
|
temp = *lp;
|
|
*lp = Layout[r];
|
|
Layout[r] = temp;
|
|
}
|
|
|
|
for (lp = Layout; lp < end; lp++) {
|
|
mvaddch(lp->y, lp->x, ch);
|
|
refresh();
|
|
}
|
|
}
|