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/*
* Grand digital clock for curses compatible terminals
* Usage: gdc [-s] [n] -- run for n seconds (default infinity)
* Flags: -s: scroll
*
* modified 10-18-89 for curses (jrl)
* 10-18-89 added signal handling
*
* $Id: gdc.c,v 1.25 2004/11/24 12:09:36 tom Exp $
*/
#include <time.h>
#include <test.priv.h>
#define YBASE 10
#define XBASE 10
#define XLENGTH 54
#define YDEPTH 5
#define PAIR_DIGITS 1
#define PAIR_OTHERS 2
#define PAIR_FRAMES 3
static short disp[11] =
{
075557, 011111, 071747, 071717, 055711,
074717, 074757, 071111, 075757, 075717, 002020
};
static long older[6], next[6], newer[6], mask;
static int sigtermed = 0;
static bool redirected = FALSE;
static bool hascolor = FALSE;
static RETSIGTYPE
sighndl(int signo)
{
signal(signo, sighndl);
sigtermed = signo;
if (redirected) {
endwin();
ExitProgram(EXIT_FAILURE);
}
}
static void
drawbox(bool scrolling)
{
chtype bottom[XLENGTH + 1];
int n;
if (hascolor)
attrset(COLOR_PAIR(PAIR_FRAMES));
mvaddch(YBASE - 1, XBASE - 1, ACS_ULCORNER);
hline(ACS_HLINE, XLENGTH);
mvaddch(YBASE - 1, XBASE + XLENGTH, ACS_URCORNER);
mvaddch(YBASE + YDEPTH, XBASE - 1, ACS_LLCORNER);
mvinchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH);
for (n = 0; n < XLENGTH; n++) {
if (!scrolling)
bottom[n] &= ~A_COLOR;
bottom[n] = ACS_HLINE | (bottom[n] & (A_ATTRIBUTES | A_COLOR));
}
mvaddchnstr(YBASE + YDEPTH, XBASE, bottom, XLENGTH);
mvaddch(YBASE + YDEPTH, XBASE + XLENGTH, ACS_LRCORNER);
move(YBASE, XBASE - 1);
vline(ACS_VLINE, YDEPTH);
move(YBASE, XBASE + XLENGTH);
vline(ACS_VLINE, YDEPTH);
if (hascolor)
attrset(COLOR_PAIR(PAIR_OTHERS));
}
static void
standt(int on)
{
if (on) {
if (hascolor) {
attron(COLOR_PAIR(PAIR_DIGITS));
} else {
attron(A_STANDOUT);
}
} else {
if (hascolor) {
attron(COLOR_PAIR(PAIR_OTHERS));
} else {
attroff(A_STANDOUT);
}
}
}
static void
set(int t, int n)
{
int i, m;
m = 7 << n;
for (i = 0; i < 5; i++) {
next[i] |= ((disp[t] >> ((4 - i) * 3)) & 07) << n;
mask |= (next[i] ^ older[i]) & m;
}
if (mask & m)
mask |= m;
}
static void
usage(void)
{
static const char *msg[] =
{
"Usage: gdc [options] [count]"
,""
,"Options:"
," -n redirect input to /dev/null"
," -s scroll each number into place, rather than flipping"
,""
,"If you specify a count, gdc runs for that number of seconds"
};
unsigned j;
for (j = 0; j < SIZEOF(msg); j++)
fprintf(stderr, "%s\n", msg[j]);
ExitProgram(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
time_t now;
struct tm *tm;
long t, a;
int i, j, s, k;
int count = 0;
FILE *ofp = stdout;
FILE *ifp = stdin;
bool scrol = FALSE;
setlocale(LC_ALL, "");
signal(SIGINT, sighndl);
signal(SIGTERM, sighndl);
while ((k = getopt(argc, argv, "sn")) != EOF) {
switch (k) {
case 's':
scrol = TRUE;
break;
case 'n':
ifp = fopen("/dev/null", "r");
redirected = TRUE;
break;
default:
usage();
}
}
if (optind < argc) {
count = atoi(argv[optind++]);
}
if (optind < argc)
usage();
if (redirected) {
char *name = getenv("TERM");
if (name == 0
|| newterm(name, ofp, ifp) == 0) {
fprintf(stderr, "cannot open terminal\n");
ExitProgram(EXIT_FAILURE);
}
} else {
initscr();
}
cbreak();
noecho();
nodelay(stdscr, 1);
curs_set(0);
hascolor = has_colors();
if (hascolor) {
int bg = COLOR_BLACK;
start_color();
#if HAVE_USE_DEFAULT_COLORS
if (use_default_colors() == OK)
bg = -1;
#endif
init_pair(PAIR_DIGITS, COLOR_BLACK, COLOR_RED);
init_pair(PAIR_OTHERS, COLOR_RED, bg);
init_pair(PAIR_FRAMES, COLOR_WHITE, bg);
attrset(COLOR_PAIR(PAIR_OTHERS));
}
restart:
for (j = 0; j < 5; j++)
older[j] = newer[j] = next[j] = 0;
clear();
drawbox(FALSE);
do {
char buf[30];
time(&now);
tm = localtime(&now);
mask = 0;
set(tm->tm_sec % 10, 0);
set(tm->tm_sec / 10, 4);
set(tm->tm_min % 10, 10);
set(tm->tm_min / 10, 14);
set(tm->tm_hour % 10, 20);
set(tm->tm_hour / 10, 24);
set(10, 7);
set(10, 17);
for (k = 0; k < 6; k++) {
if (scrol) {
for (i = 0; i < 5; i++)
newer[i] = (newer[i] & ~mask) | (newer[i + 1] & mask);
newer[5] = (newer[5] & ~mask) | (next[k] & mask);
} else
newer[k] = (newer[k] & ~mask) | (next[k] & mask);
next[k] = 0;
for (s = 1; s >= 0; s--) {
standt(s);
for (i = 0; i < 6; i++) {
if ((a = (newer[i] ^ older[i]) & (s ? newer : older)[i])
!= 0) {
for (j = 0, t = 1 << 26; t; t >>= 1, j++) {
if (a & t) {
if (!(a & (t << 1))) {
move(YBASE + i, XBASE + 2 * j);
}
addstr(" ");
}
}
}
if (!s) {
older[i] = newer[i];
}
}
if (!s) {
if (scrol)
drawbox(TRUE);
refresh();
/*
* If we're scrolling, space out the refreshes to fake
* movement. That's 7 frames, or 6 intervals, which would
* be 166 msec if we spread it out over a second. It looks
* better (but will work on a slow terminal, e.g., less
* than 9600bd) to squeeze that into a half-second, and use
* half of 170 msec to ensure that the program doesn't eat
* a lot of time when asking what time it is, at the top of
* this loop -T.Dickey
*/
if (scrol)
napms(85);
}
}
}
/* this depends on the detailed format of ctime(3) */
(void) strcpy(buf, ctime(&now));
(void) strcpy(buf + 10, buf + 19);
mvaddstr(16, 30, buf);
move(6, 0);
drawbox(FALSE);
refresh();
/*
* If we're not scrolling, wait 1000 msec (1 sec). Use napms() rather
* than sleep() because the latter does odd things on some systems,
* e.g., suspending output as well.
*/
if (scrol)
napms(500);
else
napms(1000);
/*
* This is a safe way to check if we're interrupted - making the signal
* handler set a flag that we can check. Since we're running
* nodelay(), the wgetch() call returns immediately, and in particular
* will return an error if interrupted. This works only if we can
* read from the input, of course.
*/
switch (wgetch(stdscr)) {
case 'q':
count = 1;
break;
case 's':
nodelay(stdscr, FALSE);
break;
case ' ':
nodelay(stdscr, TRUE);
break;
#ifdef KEY_RESIZE
case KEY_RESIZE:
#endif
case '?':
goto restart;
case ERR:
if (sigtermed) {
standend();
endwin();
fprintf(stderr, "gdc terminated by signal %d\n", sigtermed);
ExitProgram(EXIT_FAILURE);
}
/* FALLTHRU */
default:
continue;
}
} while (--count);
standend();
endwin();
ExitProgram(EXIT_SUCCESS);
}
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