drivers/tty/n_tty.c

124 	unsigned int column;
409  * Locking: should be called under the %output_lock to protect the column state
423 			ldata->column = 0;
427 			ldata->canon_column = ldata->column = 0;
431 		ldata->canon_column = ldata->column;
434 		if (O_ONOCR(tty) && ldata->column == 0)
439 				ldata->canon_column = ldata->column = 0;
442 		ldata->canon_column = ldata->column = 0;
445 		spaces = 8 - (ldata->column & 7);
449 			ldata->column += spaces;
453 		ldata->column += spaces;
456 		if (ldata->column > 0)
457 			ldata->column--;
464 				ldata->column++;
483  * Locking: %output_lock to protect column state and space left (also, this is
518  * Locking: %output_lock to protect column state and space left (also, this is
545 				ldata->column = 0;
548 			ldata->canon_column = ldata->column;
551 			if (O_ONOCR(tty) && ldata->column == 0)
555 			ldata->canon_column = ldata->column = 0;
560 			if (ldata->column > 0)
561 				ldata->column--;
568 					ldata->column++;
613 		 * offset by canon column. Otherwise, tab spacing is normal.
625 			if (ldata->column > 0)
626 				ldata->column--;
632 		ldata->canon_column = ldata->column;
637 		if (ldata->column > 0)
638 			ldata->column--;
648 		ldata->column++;
665 		ldata->column += 2;
687  * driver at the time of the write, operations like certain changes in column
826  * echo_move_back_col	-	add operation to move back a column
829  * Add an operation to the echo buffer to move back one column.
838  * echo_set_canon_col	-	add operation to set the canon column
841  * Add an operation to the echo buffer to set the canon column to the current
842  * column.
860  * information will be used later, along with canon column (if applicable), to
1333 			/* Record the column of first canon char. */
1396 			/* Record the column of first canon char. */
1433 		/* Record the column of first canon char. */
2339  * here as well as in the echo processing function to protect the column state
2344  * Locking: output_lock to protect column state and space left