Annotation of gforth/etags.fs, revision 1.18
1.1 anton 1: \ Etags support for GNU Forth.
2:
1.16 anton 3: \ Copyright (C) 1995,1998,2001,2003,2007 Free Software Foundation, Inc.
1.3 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
1.17 anton 9: \ as published by the Free Software Foundation, either version 3
1.3 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
1.17 anton 18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.3 anton 19:
20:
1.1 anton 21: \ This does not work like etags; instead, the TAGS file is updated
22: \ during the normal Forth interpretation/compilation process.
23:
24: \ The present version has several shortcomings: It always overwrites
25: \ the TAGS file instead of just the parts corresponding to the loaded
26: \ files, but you can have several tag tables in emacs. Every load
27: \ creates a new etags file and the user has to confirm that she wants
28: \ to use it.
29:
30: \ Communication of interactive programs like emacs and Forth over
31: \ files is clumsy. There should be better cooperation between them
32: \ (e.g. via shared memory)
33:
34: \ This is ANS Forth with the following serious environmental
1.18 ! anton 35: \ dependences: the word LATEST must return a pointer to the last
1.1 anton 36: \ header, NAME>STRING must convert that pointer to a string, and
37: \ HEADER must be a deferred word that is called to create the name.
38:
1.11 dvdkhlng 39: \ Changes by David: Removed the blanks before and after the explicit
40: \ tag name, since that conflicts with Emacs' auto-completition. In
41: \ fact those blanks are not necessary, since search is performed on
42: \ the tag-text, rather than the tag name.
43:
1.8 pazsan 44: require search.fs
1.15 pazsan 45: require environ.fs
1.8 pazsan 46: require extend.fs
1.7 pazsan 47:
1.1 anton 48: : tags-file-name ( -- c-addr u )
49: \ for now I use just TAGS; this may become more flexible in the
50: \ future
51: s" TAGS" ;
52:
53: variable tags-file 0 tags-file !
54:
55: create tags-line 128 chars allot
56:
57: : skip-tags ( file-id -- )
58: \ reads in file until it finds the end or the loadfilename
59: drop ;
60:
61: : tags-file-id ( -- file-id )
62: tags-file @ 0= if
63: tags-file-name w/o create-file throw
64: \ 2dup file-status
65: \ if \ the file does not exist
66: \ drop w/o create-file throw
67: \ else
68: \ drop r/w open-file throw
69: \ dup skip-tags
70: \ endif
71: tags-file !
72: endif
73: tags-file @ ;
74:
75: 2variable last-loadfilename 0 0 last-loadfilename 2!
76:
77: : put-load-file-name ( file-id -- )
78: >r
1.4 anton 79: sourcefilename last-loadfilename 2@ d<>
1.1 anton 80: if
81: #ff r@ emit-file throw
82: #lf r@ emit-file throw
1.4 anton 83: sourcefilename 2dup
1.1 anton 84: r@ write-file throw
85: last-loadfilename 2!
86: s" ,0" r@ write-line throw
87: endif
88: rdrop ;
89:
90: : put-tags-entry ( -- )
91: \ write the entry for the last name to the TAGS file
92: \ if the input is from a file and it is not a local name
93: source-id dup 0<> swap -1 <> and \ input from a file
1.5 anton 94: current @ locals-list <> and \ not a local name
1.13 anton 95: latest 0<> and \ not an anonymous (i.e. noname) header
1.1 anton 96: if
97: tags-file-id >r
98: r@ put-load-file-name
99: source drop >in @ r@ write-file throw
100: 127 r@ emit-file throw
1.11 dvdkhlng 101: \ bl r@ emit-file throw
1.13 anton 102: latest name>string r@ write-file throw
1.11 dvdkhlng 103: \ bl r@ emit-file throw
1.1 anton 104: 1 r@ emit-file throw
1.4 anton 105: base @ decimal sourceline# 0 <# #s #> r@ write-file throw base !
1.1 anton 106: s" ,0" r@ write-line throw
107: \ the character position in the file; not strictly necessary AFAIK
108: \ instead of using 0, we could use file-position and subtract
109: \ the line length
110: rdrop
1.5 anton 111: endif ;
1.1 anton 112:
113: : (tags-header) ( -- )
114: defers header
115: put-tags-entry ;
116:
117: ' (tags-header) IS header
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