File:  [gforth] / gforth / kernel / saccept.fs
Revision 1.13: download - view: text, annotated - select for diffs
Sat May 27 21:19:25 2006 UTC (16 years, 6 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Bugfix in simple accept
deferred PAUSE in Gforth R8C kernel (for ms)

\ a very simple accept approach

\ Copyright (C) 1995,1996,1997,1998,1999,2000,2003 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.

require ./io.fs

\ : xon $11 emit ;
\ : xoff $13 emit ;

Variable eof
Variable echo  -1 echo !

: accept ( adr len -- len )
  ( xon ) over + over ( start end pnt )  eof off
  BEGIN
   key dup #del = IF drop #bs THEN
   dup bl u<
   IF
       dup #cr = over #lf = or IF
	   echo @ IF  space  THEN  drop nip swap - ( xoff ) EXIT THEN
       dup #eof = IF  eof on  THEN
       #bs = IF 2 pick over <>
	   IF 1 chars -
	       echo @ IF  #bs emit bl emit #bs emit  THEN
	   ELSE  echo @ IF  bell  THEN  THEN  THEN
   ELSE	>r 2dup <> IF r>
	   echo @ IF  dup emit  THEN
	   over c! char+ ELSE r> drop bell THEN
   THEN 
  AGAIN ;
  

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