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Annotation of gforth/kernel/saccept.fs, revision 1.13

1.1       anton       1: \ a very simple accept approach
                      2: 
1.8       anton       3: \ Copyright (C) 1995,1996,1997,1998,1999,2000,2003 Free Software Foundation, Inc.
1.1       anton       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
1.6       anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      20: 
1.4       jwilke     21: require ./io.fs
                     22: 
1.10      pazsan     23: \ : xon $11 emit ;
                     24: \ : xoff $13 emit ;
                     25: 
1.12      pazsan     26: Variable eof
                     27: Variable echo  -1 echo !
                     28: 
1.2       pazsan     29: : accept ( adr len -- len )
1.12      pazsan     30:   ( xon ) over + over ( start end pnt )  eof off
1.1       anton      31:   BEGIN
1.2       pazsan     32:    key dup #del = IF drop #bs THEN
1.1       anton      33:    dup bl u<
1.12      pazsan     34:    IF
                     35:        dup #cr = over #lf = or IF
                     36:           echo @ IF  space  THEN  drop nip swap - ( xoff ) EXIT THEN
                     37:        dup #eof = IF  eof on  THEN
1.13    ! pazsan     38:        #bs = IF 2 pick over <>
1.12      pazsan     39:           IF 1 chars -
                     40:               echo @ IF  #bs emit bl emit #bs emit  THEN
                     41:           ELSE  echo @ IF  bell  THEN  THEN  THEN
                     42:    ELSE        >r 2dup <> IF r>
                     43:           echo @ IF  dup emit  THEN
                     44:           over c! char+ ELSE r> drop bell THEN
1.1       anton      45:    THEN 
                     46:   AGAIN ;
                     47: