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\ Input 13feb93py
\ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ You should have received a copy of the GNU General Public License
\ along with this program; if not, write to the Free Software
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
: (ins) ( max span addr pos1 key -- max span addr pos2 )
>r 2dup + r@ swap c! r> emit 1+ rot 1+ -rot ;
: (bs) ( max span addr pos1 -- max span addr pos2 flag )
dup IF
#bs emit bl emit #bs emit 1- rot 1- -rot
THEN false ;
: (ret) true bl emit ;
Create ctrlkeys
] false false false false false false false false
(bs) false (ret) false false (ret) false false
false false false false false false false false
false false false false false false false false [
defer insert-char
' (ins) IS insert-char
defer everychar
' noop IS everychar
: decode ( max span addr pos1 key -- max span addr pos2 flag )
everychar
dup #del = IF drop #bs THEN \ del is rubout
dup bl u< IF cells ctrlkeys + perform EXIT THEN
>r 2over = IF rdrop bell 0 EXIT THEN
r> insert-char 0 ;
: accept ( c-addr +n1 -- +n2 ) \ core
\G Receive a string of at most @var{+n2} characters, and store it
\G in memory starting at @var{c-addr}. The string is
\G displayed. Input terminates when the <return> key is pressed or
\G @var{n1} characters have been received. The normal Gforth line
\G editing capabilites are available. @var{+n2} is the length of
\G the string; it does not include the <return> character.
dup 0< IF abs over dup 1 chars - c@ tuck type
\ this allows to edit given strings
ELSE 0 THEN rot over
BEGIN key decode UNTIL
2drop nip ;
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