[unix-history] / usr / src / lib / libcurses / addch.c

# include	"curses.ext"

/*
 *	This routine adds the character to the current position
 *
 * @(#)addch.c	1.6 (Berkeley) %G%
 */
waddch(win, c)
reg WINDOW	*win;
char		c;
{
	reg int		x, y;
	reg WINDOW	*wp;

	x = win->_curx;
	y = win->_cury;
# ifdef FULLDEBUG
	fprintf(outf, "ADDCH('%c') at (%d, %d)\n", c, y, x);
# endif
	if (y >= win->_maxy || x >= win->_maxx || y < 0 || x < 0)
		return ERR;
	switch (c) {
	  case '\t':
	  {
		reg int		newx;

		for (newx = x + (8 - (x & 07)); x < newx; x++)
			if (waddch(win, ' ') == ERR)
				return ERR;
		return OK;
	  }

	  default:
# ifdef FULLDEBUG
		fprintf(outf, "ADDCH: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
# endif
		if (win->_flags & _STANDOUT)
			c |= _STANDOUT;
		set_ch(win, y, x, c, NULL);
		for (wp = win->_nextp; wp != win; wp = wp->_nextp)
			set_ch(wp, y, x, c, win);
		win->_y[y][x++] = c;
		if (x >= win->_maxx) {
			x = 0;
newline:
			if (++y >= win->_maxy)
				if (win->_scroll) {
					wrefresh(win);
					scroll(win);
					--y;
				}
				else
					return ERR;
		}
# ifdef FULLDEBUG
		fprintf(outf, "ADDCH: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
# endif
		break;
	  case '\n':
		wclrtoeol(win);
		if (!NONL)
			x = 0;
		goto newline;
	  case '\r':
		x = 0;
		break;
	  case '\b':
		if (--x < 0)
			x = 0;
		break;
	}
	win->_curx = x;
	win->_cury = y;
	return OK;
}

/*
 * set_ch:
 *	Set the first and last change flags for this window.
 */
static
set_ch(win, y, x, ch, orig)
reg WINDOW	*win;
int		y, x;
WINDOW		*orig; {

	if (orig != NULL) {
		y -= win->_begy - orig->_begy;
		x -= win->_begx - orig->_begx;
	}
	if (y < 0 || y >= win->_maxy || x < 0 || x >= win->_maxx)
		return;
	if (win->_y[y][x] != ch) {
		if (win->_firstch[y] == _NOCHANGE)
			win->_firstch[y] = win->_lastch[y] = x + win->_ch_off;
		else if (x < win->_firstch[y])
			win->_firstch[y] = x + win->_ch_off;
		else if (x > win->_lastch[y])
			win->_lastch[y] = x + win->_ch_off;
	}
}
Commit	Line	Data
8b28dacd KA	1	# include "curses.ext"
	2
	3	/*
	4	* This routine adds the character to the current position
	5	*
f6b7be61	6	* @(#)addch.c 1.6 (Berkeley) %G%
8b28dacd KA	7	*/
	8	waddch(win, c)
	9	reg WINDOW *win;
	10	char c;
	11	{
	12	reg int x, y;
60d72089	13	reg WINDOW *wp;
8b28dacd KA	14
	15	x = win->_curx;
	16	y = win->_cury;
	17	# ifdef FULLDEBUG
	18	fprintf(outf, "ADDCH('%c') at (%d, %d)\n", c, y, x);
	19	# endif
	20	if (y >= win->_maxy \|\| x >= win->_maxx \|\| y < 0 \|\| x < 0)
	21	return ERR;
	22	switch (c) {
	23	case '\t':
	24	{
	25	reg int newx;
	26
b7b377b8	27	for (newx = x + (8 - (x & 07)); x < newx; x++)
8b28dacd KA	28	if (waddch(win, ' ') == ERR)
	29	return ERR;
	30	return OK;
	31	}
60d72089	32
8b28dacd KA	33	default:
	34	# ifdef FULLDEBUG
	35	fprintf(outf, "ADDCH: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
	36	# endif
	37	if (win->_flags & _STANDOUT)
	38	c \|= _STANDOUT;
9fcd8c35	39	set_ch(win, y, x, c, NULL);
60d72089	40	for (wp = win->_nextp; wp != win; wp = wp->_nextp)
9fcd8c35	41	set_ch(wp, y, x, c, win);
8b28dacd KA	42	win->_y[y][x++] = c;
8b28dacd KA	43	if (x >= win->_maxx) {
8b28dacd	44	x = 0;
4ce7bc0f KA	45	newline:
4ce7bc0f KA	46	if (++y >= win->_maxy)
8b28dacd KA	47	if (win->_scroll) {
	48	wrefresh(win);
	49	scroll(win);
	50	--y;
	51	}
	52	else
	53	return ERR;
	54	}
	55	# ifdef FULLDEBUG
	56	fprintf(outf, "ADDCH: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", y, x, win->_firstch[y], win->_lastch[y]);
	57	# endif
	58	break;
	59	case '\n':
	60	wclrtoeol(win);
4ce7bc0f KA	61	if (!NONL)
	62	x = 0;
	63	goto newline;
8b28dacd KA	64	case '\r':
	65	x = 0;
	66	break;
	67	case '\b':
	68	if (--x < 0)
	69	x = 0;
	70	break;
	71	}
	72	win->_curx = x;
	73	win->_cury = y;
	74	return OK;
	75	}
60d72089 KA	76
	77	/*
	78	* set_ch:
	79	* Set the first and last change flags for this window.
	80	*/
	81	static
9fcd8c35	82	set_ch(win, y, x, ch, orig)
60d72089	83	reg WINDOW *win;
9fcd8c35 KA	84	int y, x;
9fcd8c35 KA	85	WINDOW *orig; {
60d72089	86
9fcd8c35 KA	87	if (orig != NULL) {
	88	y -= win->_begy - orig->_begy;
	89	x -= win->_begx - orig->_begx;
60d72089	90	}
9fcd8c35 KA	91	if (y < 0 \|\| y >= win->_maxy \|\| x < 0 \|\| x >= win->_maxx)
9fcd8c35 KA	92	return;
60d72089 KA	93	if (win->_y[y][x] != ch) {
60d72089 KA	94	if (win->_firstch[y] == _NOCHANGE)
f6b7be61	95	win->_firstch[y] = win->_lastch[y] = x + win->_ch_off;
60d72089	96	else if (x < win->_firstch[y])
f6b7be61	97	win->_firstch[y] = x + win->_ch_off;
60d72089	98	else if (x > win->_lastch[y])
f6b7be61	99	win->_lastch[y] = x + win->_ch_off;
60d72089 KA	100	}
60d72089 KA	101	}