[ SEA-GHOST MINI SHELL]
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/*
@@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
@@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
@@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
@@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
@@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
@@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
@@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
Eric P. Scott
Caltech High Energy Physics
October, 1980
Hacks to turn this into a test frame for cursor movement:
Eric S. Raymond <esr@snark.thyrsus.com>
January, 1995
July 1995 (esr): worms is now in living color! :-)
Options:
-f fill screen with copies of 'WORM' at start.
-l <n> set worm length
-n <n> set number of worms
-t make worms leave droppings
-T <start> <end> set trace interval
-S set single-stepping during trace interval
-N suppress cursor-movement optimization
This program makes a good torture-test for the ncurses cursor-optimization
code. You can use -T to set the worm move interval over which movement
traces will be dumped. The program stops and waits for one character of
input at the beginning and end of the interval.
$Id: worm.c,v 1.64 2013/04/27 19:50:17 tom Exp $
*/
#include <test.priv.h>
#ifdef USE_PTHREADS
#include <pthread.h>
#endif
WANT_USE_WINDOW();
#define MAX_WORMS 40
#define MAX_LENGTH 1024
static chtype flavor[] =
{
'O', '*', '#', '$', '%', '0', '@',
};
static const int xinc[] =
{
1, 1, 1, 0, -1, -1, -1, 0
}, yinc[] =
{
-1, 0, 1, 1, 1, 0, -1, -1
};
typedef struct worm {
int orientation;
int head;
int *xpos;
int *ypos;
chtype attrs;
#ifdef USE_PTHREADS
pthread_t thread;
#endif
} WORM;
static unsigned long sequence = 0;
static bool quitting = FALSE;
static WORM worm[MAX_WORMS];
static int **refs;
static int last_x, last_y;
static const char *field;
static int length = 16, number = 3;
static chtype trail = ' ';
static unsigned pending;
#ifdef TRACE
static int generation, trace_start, trace_end;
#endif /* TRACE */
/* *INDENT-OFF* */
static const struct options {
int nopts;
int opts[3];
} normal[8]={
{ 3, { 7, 0, 1 } },
{ 3, { 0, 1, 2 } },
{ 3, { 1, 2, 3 } },
{ 3, { 2, 3, 4 } },
{ 3, { 3, 4, 5 } },
{ 3, { 4, 5, 6 } },
{ 3, { 5, 6, 7 } },
{ 3, { 6, 7, 0 } }
}, upper[8]={
{ 1, { 1, 0, 0 } },
{ 2, { 1, 2, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 4, 5, 0 } },
{ 1, { 5, 0, 0 } },
{ 2, { 1, 5, 0 } }
}, left[8]={
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 2, 3, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 3, 7, 0 } },
{ 1, { 7, 0, 0 } },
{ 2, { 7, 0, 0 } }
}, right[8]={
{ 1, { 7, 0, 0 } },
{ 2, { 3, 7, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 3, 4, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 6, 7, 0 } }
}, lower[8]={
{ 0, { 0, 0, 0 } },
{ 2, { 0, 1, 0 } },
{ 1, { 1, 0, 0 } },
{ 2, { 1, 5, 0 } },
{ 1, { 5, 0, 0 } },
{ 2, { 5, 6, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
}, upleft[8]={
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 1, 3, 0 } },
{ 1, { 1, 0, 0 } }
}, upright[8]={
{ 2, { 3, 5, 0 } },
{ 1, { 3, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 5, 0, 0 } }
}, lowleft[8]={
{ 3, { 7, 0, 1 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 1, 0, 0 } },
{ 2, { 1, 7, 0 } },
{ 1, { 7, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
}, lowright[8]={
{ 0, { 0, 0, 0 } },
{ 1, { 7, 0, 0 } },
{ 2, { 5, 7, 0 } },
{ 1, { 5, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
};
/* *INDENT-ON* */
static void
failed(const char *s)
{
perror(s);
endwin();
ExitProgram(EXIT_FAILURE);
}
static void
cleanup(void)
{
USING_WINDOW(stdscr, wrefresh);
curs_set(1);
endwin();
}
static void
onsig(int sig GCC_UNUSED)
{
cleanup();
ExitProgram(EXIT_FAILURE);
}
static double
ranf(void)
{
long r = (rand() & 077777);
return ((double) r / 32768.);
}
static int
draw_worm(WINDOW *win, void *data)
{
WORM *w = (WORM *) data;
const struct options *op;
unsigned mask = (unsigned) (~(1 << (w - worm)));
chtype attrs = w->attrs | ((mask & pending) ? A_REVERSE : 0);
int x;
int y;
int h;
bool done = FALSE;
if ((x = w->xpos[h = w->head]) < 0) {
wmove(win, y = w->ypos[h] = last_y, x = w->xpos[h] = 0);
waddch(win, attrs);
refs[y][x]++;
} else {
y = w->ypos[h];
}
if (x > last_x)
x = last_x;
if (y > last_y)
y = last_y;
if (++h == length)
h = 0;
if (w->xpos[w->head = h] >= 0) {
int x1, y1;
x1 = w->xpos[h];
y1 = w->ypos[h];
if (y1 < LINES
&& x1 < COLS
&& --refs[y1][x1] == 0) {
wmove(win, y1, x1);
waddch(win, trail);
}
}
op = &(x == 0
? (y == 0
? upleft
: (y == last_y
? lowleft
: left))
: (x == last_x
? (y == 0
? upright
: (y == last_y
? lowright
: right))
: (y == 0
? upper
: (y == last_y
? lower
: normal))))[w->orientation];
switch (op->nopts) {
case 0:
done = TRUE;
break;
case 1:
w->orientation = op->opts[0];
break;
default:
w->orientation = op->opts[(int) (ranf() * (double) op->nopts)];
break;
}
if (!done) {
x += xinc[w->orientation];
y += yinc[w->orientation];
wmove(win, y, x);
if (y < 0)
y = 0;
waddch(win, attrs);
w->ypos[h] = y;
w->xpos[h] = x;
refs[y][x]++;
}
return done;
}
#ifdef USE_PTHREADS
static bool
quit_worm(int bitnum)
{
pending |= (1 << bitnum);
napms(10); /* let the other thread(s) have a chance */
pending &= ~(1 << bitnum);
return quitting;
}
static void *
start_worm(void *arg)
{
unsigned long compare = 0;
Trace(("start_worm"));
while (!quit_worm(((struct worm *) arg) - worm)) {
while (compare < sequence) {
++compare;
#if HAVE_USE_WINDOW
use_window(stdscr, draw_worm, arg);
#else
draw_worm(stdscr, arg);
#endif
}
}
Trace(("...start_worm (done)"));
return NULL;
}
#endif
static bool
draw_all_worms(void)
{
bool done = FALSE;
int n;
struct worm *w;
#ifdef USE_PTHREADS
static bool first = TRUE;
if (first) {
first = FALSE;
for (n = 0, w = &worm[0]; n < number; n++, w++) {
int rc;
rc = pthread_create(&(w->thread), NULL, start_worm, w);
}
}
#else
for (n = 0, w = &worm[0]; n < number; n++, w++) {
if (
#if HAVE_USE_WINDOW
USING_WINDOW2(stdscr, draw_worm, w)
#else
draw_worm(stdscr, w)
#endif
)
done = TRUE;
}
#endif
return done;
}
static int
get_input(void)
{
int ch;
ch = USING_WINDOW(stdscr, wgetch);
return ch;
}
#ifdef KEY_RESIZE
static int
update_refs(WINDOW *win)
{
int x, y;
(void) win;
if (last_x != COLS - 1) {
for (y = 0; y <= last_y; y++) {
refs[y] = typeRealloc(int, (size_t) COLS, refs[y]);
if (!refs[y])
failed("update_refs");
for (x = last_x + 1; x < COLS; x++)
refs[y][x] = 0;
}
last_x = COLS - 1;
}
if (last_y != LINES - 1) {
for (y = LINES; y <= last_y; y++)
free(refs[y]);
refs = typeRealloc(int *, (size_t) LINES, refs);
for (y = last_y + 1; y < LINES; y++) {
refs[y] = typeMalloc(int, (size_t) COLS);
if (!refs[y])
failed("update_refs");
for (x = 0; x < COLS; x++)
refs[y][x] = 0;
}
last_y = LINES - 1;
}
return OK;
}
#endif
int
main(int argc, char *argv[])
{
int x, y;
int n;
struct worm *w;
int *ip;
bool done = FALSE;
int max_refs;
setlocale(LC_ALL, "");
for (x = 1; x < argc; x++) {
char *p;
p = argv[x];
if (*p == '-')
p++;
switch (*p) {
case 'f':
field = "WORM";
break;
case 'l':
if (++x == argc)
goto usage;
if ((length = atoi(argv[x])) < 2 || length > MAX_LENGTH) {
fprintf(stderr, "%s: Invalid length\n", *argv);
ExitProgram(EXIT_FAILURE);
}
break;
case 'n':
if (++x == argc)
goto usage;
if ((number = atoi(argv[x])) < 1 || number > MAX_WORMS) {
fprintf(stderr, "%s: Invalid number of worms\n", *argv);
ExitProgram(EXIT_FAILURE);
}
break;
case 't':
trail = '.';
break;
#ifdef TRACE
case 'T':
trace_start = atoi(argv[++x]);
trace_end = atoi(argv[++x]);
break;
case 'N':
_nc_optimize_enable ^= OPTIMIZE_ALL; /* declared by ncurses */
break;
#endif /* TRACE */
default:
usage:
fprintf(stderr,
"usage: %s [-field] [-length #] [-number #] [-trail]\n", *argv);
ExitProgram(EXIT_FAILURE);
}
}
signal(SIGINT, onsig);
initscr();
noecho();
cbreak();
nonl();
curs_set(0);
last_y = LINES - 1;
last_x = COLS - 1;
#ifdef A_COLOR
if (has_colors()) {
int bg = COLOR_BLACK;
start_color();
#if HAVE_USE_DEFAULT_COLORS
if (use_default_colors() == OK)
bg = -1;
#endif
#define SET_COLOR(num, fg) \
init_pair(num+1, (short) fg, (short) bg); \
flavor[num] |= (chtype) COLOR_PAIR(num+1) | A_BOLD
SET_COLOR(0, COLOR_GREEN);
SET_COLOR(1, COLOR_RED);
SET_COLOR(2, COLOR_CYAN);
SET_COLOR(3, COLOR_WHITE);
SET_COLOR(4, COLOR_MAGENTA);
SET_COLOR(5, COLOR_BLUE);
SET_COLOR(6, COLOR_YELLOW);
}
#endif /* A_COLOR */
max_refs = LINES;
refs = typeMalloc(int *, (size_t) max_refs);
for (y = 0; y < max_refs; y++) {
refs[y] = typeMalloc(int, (size_t) COLS);
for (x = 0; x < COLS; x++) {
refs[y][x] = 0;
}
}
#ifdef BADCORNER
/* if addressing the lower right corner doesn't work in your curses */
refs[last_y][last_x] = 1;
#endif /* BADCORNER */
for (n = number, w = &worm[0]; --n >= 0; w++) {
w->attrs = flavor[(unsigned) n % SIZEOF(flavor)];
w->orientation = 0;
w->head = 0;
if (!(ip = typeMalloc(int, (size_t) (length + 1)))) {
fprintf(stderr, "%s: out of memory\n", *argv);
ExitProgram(EXIT_FAILURE);
}
w->xpos = ip;
for (x = length; --x >= 0;)
*ip++ = -1;
if (!(ip = typeMalloc(int, (size_t) (length + 1)))) {
fprintf(stderr, "%s: out of memory\n", *argv);
ExitProgram(EXIT_FAILURE);
}
w->ypos = ip;
for (y = length; --y >= 0;)
*ip++ = -1;
}
if (field) {
const char *p;
p = field;
for (y = last_y; --y >= 0;) {
for (x = COLS; --x >= 0;) {
addch((chtype) (*p++));
if (!*p)
p = field;
}
}
}
USING_WINDOW(stdscr, wrefresh);
nodelay(stdscr, TRUE);
while (!done) {
int ch;
++sequence;
if ((ch = get_input()) > 0) {
#ifdef TRACE
if (trace_start || trace_end) {
if (generation == trace_start) {
trace(TRACE_CALLS);
get_input();
} else if (generation == trace_end) {
trace(0);
get_input();
}
generation++;
}
#endif
#ifdef KEY_RESIZE
if (ch == KEY_RESIZE) {
USING_WINDOW(stdscr, update_refs);
}
#endif
/*
* Make it simple to put this into single-step mode, or resume
* normal operation -T.Dickey
*/
if (ch == 'q') {
quitting = TRUE;
done = TRUE;
continue;
} else if (ch == 's') {
nodelay(stdscr, FALSE);
} else if (ch == ' ') {
nodelay(stdscr, TRUE);
}
}
done = draw_all_worms();
napms(10);
USING_WINDOW(stdscr, wrefresh);
}
Trace(("Cleanup"));
cleanup();
#ifdef NO_LEAKS
for (y = 0; y < max_refs; y++) {
free(refs[y]);
}
free(refs);
for (n = number, w = &worm[0]; --n >= 0; w++) {
free(w->xpos);
free(w->ypos);
}
#endif
#ifdef USE_PTHREADS
/*
* Do this just in case one of the threads did not really exit.
*/
Trace(("join all threads"));
for (n = 0; n < number; n++) {
pthread_join(worm[n].thread, NULL);
}
#endif
ExitProgram(EXIT_SUCCESS);
}
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