Annotation of gforth/kernel/accept.fs, revision 1.11
1.1 anton 1: \ Input 13feb93py
2:
1.11 ! anton 3: \ Copyright (C) 1995,1996,1997,1999,2003 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
1.7 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 )
22: >r 2dup + r@ swap c! r> emit 1+ rot 1+ -rot ;
23: : (bs) ( max span addr pos1 -- max span addr pos2 flag )
24: dup IF
1.5 anton 25: #bs emit space #bs emit 1- rot 1- -rot
1.1 anton 26: THEN false ;
1.5 anton 27: : (ret) ( max span addr pos1 -- max span addr pos2 flag )
28: true space ;
1.1 anton 29:
30: Create ctrlkeys
1.9 jwilke 31: ' false a, ' false a, ' false a, ' false a,
32: ' false a, ' false a, ' false a, ' false a,
33:
34: ' (bs) a, ' false a, ' (ret) a, ' false a,
35: ' false a, ' (ret) a, ' false a, ' false a,
36:
37: ' false a, ' false a, ' false a, ' false a,
38: ' false a, ' false a, ' false a, ' false a,
39:
40: ' false a, ' false a, ' false a, ' false a,
41: ' false a, ' false a, ' false a, ' false a,
1.1 anton 42:
43: defer insert-char
44: ' (ins) IS insert-char
45: defer everychar
46: ' noop IS everychar
47:
48: : decode ( max span addr pos1 key -- max span addr pos2 flag )
1.10 pazsan 49: everychar
50: dup -1 = IF drop 4 THEN \ -1 is EOF
51: dup #del = IF drop #bs THEN \ del is rubout
52: dup bl u< IF cells ctrlkeys + perform EXIT THEN
53: \ check for end reached
54: >r 2over = IF rdrop bell 0 EXIT THEN
55: r> insert-char 0 ;
1.1 anton 56:
1.8 anton 57: : edit-line ( c-addr n1 n2 -- n3 ) \ gforth
58: \G edit the string with length @var{n2} in the buffer @var{c-addr
59: \G n1}, like @code{accept}.
60: rot over
61: 2dup type
1.10 pazsan 62: BEGIN key decode UNTIL
1.4 crook 63: 2drop nip ;
1.8 anton 64:
65: : accept ( c-addr +n1 -- +n2 ) \ core
66: \G Get a string of up to @var{n1} characters from the user input
67: \G device and store it at @var{c-addr}. @var{n2} is the length of
68: \G the received string. The user indicates the end by pressing
69: \G @key{RET}. Gforth supports all the editing functions available
70: \G on the Forth command line (including history and word
71: \G completion) in @code{accept}.
72: dup 0< -&24 and throw \ use edit-line to edit given strings
73: 0 edit-line ;
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