1: \ a very simple accept approach
2:
3: \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21: : accept ( adr len -- len )
22: over + over ( start end pnt )
23: BEGIN
24: key dup #del = IF drop #bs THEN
25: dup bl u<
26: IF dup #cr = over #lf = or IF space drop nip swap - EXIT THEN
27: #bs = IF 3 pick over <>
28: IF 1 chars - #bs emit bl emit #bs emit ELSE bell THEN THEN
29: ELSE >r 2dup <> IF r> dup emit over c! char+ ELSE r> drop bell THEN
30: THEN
31: AGAIN ;
32:
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