static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
{
	int	spaces;

	if (!space)
		return -1;

	switch (c) {
	case '\n':
		if (O_ONLRET(tty))
			tty->column = 0;
		if (O_ONLCR(tty)) {
			if (space < 2)
				return -1;
			tty->canon_column = tty->column = 0;
			tty->ops->write(tty, "\r\n", 2);
			return 2;
		}
		tty->canon_column = tty->column;
		break;
	case '\r':
		if (O_ONOCR(tty) && tty->column == 0)
			return 0;
		if (O_OCRNL(tty)) {
			c = '\n';
			if (O_ONLRET(tty))
				tty->canon_column = tty->column = 0;
			break;
		}
		tty->canon_column = tty->column = 0;
		break;
	case '\t':
		spaces = 8 - (tty->column & 7);
		if (O_TABDLY(tty) == XTABS) {
			if (space < spaces)
				return -1;
			tty->column += spaces;
			tty->ops->write(tty, "        ", spaces);
			return spaces;
		}
		tty->column += spaces;
		break;
	case '\b':
		if (tty->column > 0)
			tty->column--;
		break;
	default:
		if (!iscntrl(c)) {
			if (O_OLCUC(tty))
				c = toupper(c);
			if (!is_continuation(c, tty))
				tty->column++;
		}
		break;
	}

	tty_put_char(tty, c);
	return 1;
}
Exemple #2
0
/*
 * opost_block --- to speed up block console writes, among other
 * things.
 */
static ssize_t opost_block(struct tty_struct * tty,
		       const unsigned char * inbuf, unsigned int nr)
{
	char	buf[80];
	int	space;
	int 	i;
	char	*cp;

	space = tty->driver.write_room(tty);
	if (!space)
		return 0;
	if (nr > space)
		nr = space;
	if (nr > sizeof(buf))
	    nr = sizeof(buf);
	nr -= copy_from_user(buf, inbuf, nr);
	if (!nr)
		return 0;
	
	for (i = 0, cp = buf; i < nr; i++, cp++) {
		switch (*cp) {
		case '\n':
			if (O_ONLRET(tty))
				tty->column = 0;
			if (O_ONLCR(tty))
				goto break_out;
			tty->canon_column = tty->column;
			break;
		case '\r':
			if (O_ONOCR(tty) && tty->column == 0)
				goto break_out;
			if (O_OCRNL(tty)) {
				*cp = '\n';
				if (O_ONLRET(tty))
					tty->canon_column = tty->column = 0;
				break;
			}
			tty->canon_column = tty->column = 0;
			break;
		case '\t':
			goto break_out;
		case '\b':
			if (tty->column > 0)
				tty->column--;
			break;
		default:
			if (O_OLCUC(tty))
				*cp = toupper(*cp);
			if (!iscntrl(*cp))
				tty->column++;
			break;
		}
	}
break_out:
	if (tty->driver.flush_chars)
		tty->driver.flush_chars(tty);
	i = tty->driver.write(tty, 0, buf, i);	
	return i;
}
Exemple #3
0
/*
 * Perform OPOST processing.  Returns -1 when the output device is
 * full and the character must be retried.
 */
static int opost(unsigned char c, struct tty_struct *tty)
{
	int	space, spaces;

	space = tty->driver.write_room(tty);
	if (!space)
		return -1;

	if (O_OPOST(tty)) {
		switch (c) {
		case '\n':
			if (O_ONLRET(tty))
				tty->column = 0;
			if (O_ONLCR(tty)) {
				if (space < 2)
					return -1;
				tty->driver.put_char(tty, '\r');
				tty->column = 0;
			}
			tty->canon_column = tty->column;
			break;
		case '\r':
			if (O_ONOCR(tty) && tty->column == 0)
				return 0;
			if (O_OCRNL(tty)) {
				c = '\n';
				if (O_ONLRET(tty))
					tty->canon_column = tty->column = 0;
				break;
			}
			tty->canon_column = tty->column = 0;
			break;
		case '\t':
			spaces = 8 - (tty->column & 7);
			if (O_TABDLY(tty) == XTABS) {
				if (space < spaces)
					return -1;
				tty->column += spaces;
				tty->driver.write(tty, 0, "        ", spaces);
				return 0;
			}
			tty->column += spaces;
			break;
		case '\b':
			if (tty->column > 0)
				tty->column--;
			break;
		default:
			if (O_OLCUC(tty))
				c = toupper(c);
			if (!iscntrl(c))
				tty->column++;
			break;
		}
	}
	tty->driver.put_char(tty, c);
	return 0;
}
static ssize_t process_output_block(struct tty_struct *tty,
				    const unsigned char *buf, unsigned int nr)
{
	int	space;
	int	i;
	const unsigned char *cp;

	mutex_lock(&tty->output_lock);

	space = tty_write_room(tty);
	if (!space) {
		mutex_unlock(&tty->output_lock);
		return 0;
	}
	if (nr > space)
		nr = space;

	for (i = 0, cp = buf; i < nr; i++, cp++) {
		unsigned char c = *cp;

		switch (c) {
		case '\n':
			if (O_ONLRET(tty))
				tty->column = 0;
			if (O_ONLCR(tty))
				goto break_out;
			tty->canon_column = tty->column;
			break;
		case '\r':
			if (O_ONOCR(tty) && tty->column == 0)
				goto break_out;
			if (O_OCRNL(tty))
				goto break_out;
			tty->canon_column = tty->column = 0;
			break;
		case '\t':
			goto break_out;
		case '\b':
			if (tty->column > 0)
				tty->column--;
			break;
		default:
			if (!iscntrl(c)) {
				if (O_OLCUC(tty))
					goto break_out;
				if (!is_continuation(c, tty))
					tty->column++;
			}
			break;
		}
	}
break_out:
	i = tty->ops->write(tty, buf, i);

	mutex_unlock(&tty->output_lock);
	return i;
}
static int opost(unsigned char c, struct tty_struct *tty)
{
	if (FULL(&tty->write_q))
		return -1;
	if (O_OPOST(tty)) {
		switch (c) {
		case '\n':
			if (O_ONLRET(tty))
				tty->column = 0;
			if (O_ONLCR(tty)) {
				if (LEFT(&tty->write_q) < 2)
					return -1;
				put_tty_queue('\r', &tty->write_q);
				tty->column = 0;
			}
			tty->canon_column = tty->column;
			break;
		case '\r':
			if (O_ONOCR(tty) && tty->column == 0)
				return 0;
			if (O_OCRNL(tty)) {
				c = '\n';
				if (O_ONLRET(tty))
					tty->canon_column = tty->column = 0;
				break;
			}
			tty->canon_column = tty->column = 0;
			break;
		case '\t':
			if (O_TABDLY(tty) == XTABS) {
				if (LEFT(&tty->write_q) < 8)
					return -1;
				do
					put_tty_queue(' ', &tty->write_q);
				while (++tty->column % 8);
				return 0;
			}
			tty->column = (tty->column | 7) + 1;
			break;
		case '\b':
			if (tty->column > 0)
				tty->column--;
			break;
		default:
			if (O_OLCUC(tty))
				c = toupper(c);
			if (!iscntrl(c))
				tty->column++;
			break;
		}
	}
	put_tty_queue(c, &tty->write_q);
	return 0;
}
Exemple #6
0
static ssize_t opost_block(struct tty_struct * tty,
		       const unsigned char * buf, unsigned int nr)
{
	int	space;
	int 	i;
	const unsigned char *cp;

	space = tty->driver->write_room(tty);
	if (!space)
		return 0;
	if (nr > space)
		nr = space;

	for (i = 0, cp = buf; i < nr; i++, cp++) {
		switch (*cp) {
		case '\n':
			if (O_ONLRET(tty))
				tty->column = 0;
			if (O_ONLCR(tty))
				goto break_out;
			tty->canon_column = tty->column;
			break;
		case '\r':
			if (O_ONOCR(tty) && tty->column == 0)
				goto break_out;
			if (O_OCRNL(tty))
				goto break_out;
			tty->canon_column = tty->column = 0;
			break;
		case '\t':
			goto break_out;
		case '\b':
			if (tty->column > 0)
				tty->column--;
			break;
		default:
			if (O_OLCUC(tty))
				goto break_out;
			if (!iscntrl(*cp))
				tty->column++;
			break;
		}
	}
break_out:
	if (tty->driver->flush_chars)
		tty->driver->flush_chars(tty);
	i = tty->driver->write(tty, buf, i);	
	return i;
}