[gforth] / gforth / locate.fs

gforth: gforth/locate.fs

1 :	pazsan	1.1	\ locate, using the TAGS file
2 :
3 :			require string.fs
4 :
5 :			Variable last-file
6 :			Variable line-buf
7 :
8 :			\ example: invoke vi
9 :
10 :			Defer do-location
11 :
12 :			Variable sys-buf
13 :			: invoke-vi ( filename u line -- ) base @ >r decimal
14 :			s" vi " sys-buf $!
15 :			0 <# bl hold #S '+ hold #> sys-buf $+!
16 :			sys-buf $+!
17 :			r> base ! sys-buf $@ system ;
18 :			' invoke-vi IS do-location
19 :
20 :			\ scan file
21 :
22 :			: tag-line ( fid -- flag ) >r
23 :			s" " line-buf $!
24 :			$100 line-buf $!len
25 :			line-buf $@ r> read-line throw
26 :			swap line-buf $!len ;
27 :			: check-word ( addr u -- addr u flag )
28 :			line-buf $@ #del $split 2nip ctrl A $split 2drop
29 :			2swap search nip nip ;
30 :			: get-file ( fid -- )
31 :			tag-line drop line-buf $@ ', $split 2drop last-file $! ;
32 :			: print-location ( -- ) base @ >r decimal
33 :			last-file $@ line-buf $@ ctrl A $split 2nip ', $split 2drop
34 :			0. 2swap >number 2drop drop r> base !
35 :			do-location ;
36 :			: locate ( "name" -- ) s" " last-file $! bl sword
37 :			s" TAGS" r/o open-file throw >r
38 :			BEGIN r@ tag-line WHILE
39 :			s" " line-buf $@ compare 0=
40 :			IF r@ get-file
41 :			ELSE 2dup check-word
42 :			IF print-location 2drop r> close-file throw EXIT THEN
43 :			THEN
44 :			REPEAT r> close-file throw 2drop true abort" tag not found" ;