[gforth] / gforth / locate.fs  

gforth: gforth/locate.fs


1 : pazsan 1.1 \ locate, using the TAGS file
2 :    
3 : anton 1.6 \ Copyright (C) 2002,2003,2007 Free Software Foundation, Inc.
4 : anton 1.3
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 : anton 1.5 \ as published by the Free Software Foundation, either version 3
10 : anton 1.3 \ 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 : anton 1.5 \ along with this program. If not, see http://www.gnu.org/licenses/.
19 : anton 1.3
20 : pazsan 1.1 require string.fs
21 :    
22 :     Variable last-file
23 :     Variable line-buf
24 :    
25 :     \ example: invoke vi
26 :    
27 :     Defer do-location
28 :    
29 :     Variable sys-buf
30 :     : invoke-vi ( filename u line -- ) base @ >r decimal
31 :     s" vi " sys-buf $!
32 :     0 <# bl hold #S '+ hold #> sys-buf $+!
33 :     sys-buf $+!
34 :     r> base ! sys-buf $@ system ;
35 :     ' invoke-vi IS do-location
36 :    
37 :     \ scan file
38 :    
39 :     : tag-line ( fid -- flag ) >r
40 :     s" " line-buf $!
41 :     $100 line-buf $!len
42 :     line-buf $@ r> read-line throw
43 :     swap line-buf $!len ;
44 :     : check-word ( addr u -- addr u flag )
45 :     line-buf $@ #del $split 2nip ctrl A $split 2drop
46 :     2swap search nip nip ;
47 :     : get-file ( fid -- )
48 :     tag-line drop line-buf $@ ', $split 2drop last-file $! ;
49 :     : print-location ( -- ) base @ >r decimal
50 :     last-file $@ line-buf $@ ctrl A $split 2nip ', $split 2drop
51 :     0. 2swap >number 2drop drop r> base !
52 :     do-location ;
53 :     : locate ( "name" -- ) s" " last-file $! bl sword
54 :     s" TAGS" r/o open-file throw >r
55 :     BEGIN r@ tag-line WHILE
56 : anton 1.2 s" " line-buf $@ str=
57 : pazsan 1.1 IF r@ get-file
58 :     ELSE 2dup check-word
59 :     IF print-location 2drop r> close-file throw EXIT THEN
60 :     THEN
61 :     REPEAT r> close-file throw 2drop true abort" tag not found" ;

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