Annotation of gforth/kernel/saccept.fs, revision 1.15

1.1       anton       1: \ a very simple accept approach
                      2: 
1.14      anton       3: \ Copyright (C) 1995,1996,1997,1998,1999,2000,2003,2006 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
1.15    ! anton       9: \ as published by the Free Software Foundation, either version 3
1.1       anton      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
1.15    ! anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       anton      19: 
1.4       jwilke     20: require ./io.fs
                     21: 
1.10      pazsan     22: \ : xon $11 emit ;
                     23: \ : xoff $13 emit ;
                     24: 
1.12      pazsan     25: Variable eof
                     26: Variable echo  -1 echo !
                     27: 
1.2       pazsan     28: : accept ( adr len -- len )
1.12      pazsan     29:   ( xon ) over + over ( start end pnt )  eof off
1.1       anton      30:   BEGIN
1.2       pazsan     31:    key dup #del = IF drop #bs THEN
1.1       anton      32:    dup bl u<
1.12      pazsan     33:    IF
                     34:        dup #cr = over #lf = or IF
                     35:           echo @ IF  space  THEN  drop nip swap - ( xoff ) EXIT THEN
                     36:        dup #eof = IF  eof on  THEN
1.13      pazsan     37:        #bs = IF 2 pick over <>
1.12      pazsan     38:           IF 1 chars -
                     39:               echo @ IF  #bs emit bl emit #bs emit  THEN
                     40:           ELSE  echo @ IF  bell  THEN  THEN  THEN
                     41:    ELSE        >r 2dup <> IF r>
                     42:           echo @ IF  dup emit  THEN
                     43:           over c! char+ ELSE r> drop bell THEN
1.1       anton      44:    THEN 
                     45:   AGAIN ;
                     46:   

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