Function db_readline

freebsd/ddb/db_input.c:316–362

(lstart, lsize)

}

int
db_readline(lstart, lsize)
	char *	lstart;
	int	lsize;
{

	if (lsize < 2)
		return (0);
	if (lsize != db_lhistlsize) {
		/*
		 * (Re)initialize input line history.  Throw away any
		 * existing history.
		 */
		db_lhist_nlines = sizeof(db_lhistory) / lsize;
		db_lhistlsize = lsize;
		db_lhistidx = -1;
	}
	db_lhistcur = db_lhistidx;

	db_force_whitespace();	/* synch output position */

	db_lbuf_start = lstart;
	db_lbuf_end   = lstart + lsize - 2;	/* Will append NL and NUL. */
	db_lc = lstart;
	db_le = lstart;

	while (!db_inputchar(cngetc()))
	    continue;

	db_capture_write(lstart, db_le - db_lbuf_start);
	db_printf("\n");	/* synch output position */
	*db_le = 0;

	if (db_le - db_lbuf_start > 1) {
	    /* Maintain input line history for non-empty lines. */
	    if (++db_lhistidx == db_lhist_nlines) {
		/* Rotate history. */
		bcopy(db_lhistory + db_lhistlsize, db_lhistory,
		      db_lhistlsize * (db_lhist_nlines - 1));
		db_lhistidx--;
	    }
	    bcopy(lstart, db_lhistory + db_lhistidx * db_lhistlsize,
		  db_lhistlsize);
	}

	return (db_le - db_lbuf_start);
}

void
db_check_interrupt(void)