Annotation of gforth/kernel/accept.fs, revision 1.17
1.1 anton 1: \ Input 13feb93py
2:
1.16 anton 3: \ Copyright (C) 1995,1996,1997,1999,2003,2004,2005 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
1.7 anton 19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1 anton 20:
21: : (ins) ( max span addr pos1 key -- max span addr pos2 )
1.13 pazsan 22: >r 2over = IF rdrop bell EXIT THEN
23: 2dup + r@ swap c! r> emit 1+ rot 1+ -rot ;
1.1 anton 24: : (bs) ( max span addr pos1 -- max span addr pos2 flag )
25: dup IF
1.5 anton 26: #bs emit space #bs emit 1- rot 1- -rot
1.1 anton 27: THEN false ;
1.5 anton 28: : (ret) ( max span addr pos1 -- max span addr pos2 flag )
29: true space ;
1.1 anton 30:
31: Create ctrlkeys
1.9 jwilke 32: ' false a, ' false a, ' false a, ' false a,
33: ' false a, ' false a, ' false a, ' false a,
34:
35: ' (bs) a, ' false a, ' (ret) a, ' false a,
36: ' false a, ' (ret) a, ' false a, ' false a,
37:
38: ' false a, ' false a, ' false a, ' false a,
39: ' false a, ' false a, ' false a, ' false a,
40:
41: ' false a, ' false a, ' false a, ' false a,
42: ' false a, ' false a, ' false a, ' false a,
1.1 anton 43:
44: defer insert-char
45: ' (ins) IS insert-char
46: defer everychar
47: ' noop IS everychar
1.12 pazsan 48: defer everyline
49: ' noop IS everyline
1.1 anton 50:
51: : decode ( max span addr pos1 key -- max span addr pos2 flag )
1.17 ! anton 52: \ perform action corresponding to key; addr max is the buffer,
! 53: \ addr span is the current string in the buffer, and pos1 is the
! 54: \ cursor position in the buffer.
1.10 pazsan 55: everychar
56: dup -1 = IF drop 4 THEN \ -1 is EOF
57: dup #del = IF drop #bs THEN \ del is rubout
58: dup bl u< IF cells ctrlkeys + perform EXIT THEN
59: \ check for end reached
1.13 pazsan 60: insert-char 0 ;
1.1 anton 61:
1.8 anton 62: : edit-line ( c-addr n1 n2 -- n3 ) \ gforth
63: \G edit the string with length @var{n2} in the buffer @var{c-addr
64: \G n1}, like @code{accept}.
1.12 pazsan 65: everyline
1.8 anton 66: rot over
67: 2dup type
1.15 anton 68: BEGIN xkey decode UNTIL
1.4 crook 69: 2drop nip ;
1.8 anton 70:
71: : accept ( c-addr +n1 -- +n2 ) \ core
72: \G Get a string of up to @var{n1} characters from the user input
73: \G device and store it at @var{c-addr}. @var{n2} is the length of
74: \G the received string. The user indicates the end by pressing
75: \G @key{RET}. Gforth supports all the editing functions available
76: \G on the Forth command line (including history and word
77: \G completion) in @code{accept}.
78: dup 0< -&24 and throw \ use edit-line to edit given strings
79: 0 edit-line ;
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