1: \ Etags support for GNU Forth.
2:
3: \ Copyright (C) 1995,1998,2001,2003,2007,2008,2012 Free Software Foundation, Inc.
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 3
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, see http://www.gnu.org/licenses/.
19:
20:
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
35: \ dependences: the word LATEST must return a pointer to the last
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:
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:
44: require search.fs
45: require environ.fs
46: require extend.fs
47:
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
79: sourcefilename last-loadfilename 2@ d<>
80: if
81: #ff r@ emit-file throw
82: #lf r@ emit-file throw
83: sourcefilename 2dup
84: r@ write-file throw
85: last-loadfilename 2!
86: s" ,0" r@ write-line throw
87: endif
88: rdrop ;
89:
90: : put-tags-string ( c-addr u -- )
91: 2>r source-id dup 0<> swap -1 <> and \ input from a file
92: current @ locals-list <> and \ not a local name
93: if
94: tags-file-id >r
95: r@ put-load-file-name
96: source drop >in @ r@ write-file throw
97: 127 r@ emit-file throw
98: r> 2r> rot dup >r write-file throw
99: 1 r@ emit-file throw
100: base @ decimal sourceline# 0 <# #s #> r@ write-file throw base !
101: s" ,0" r@ write-line throw
102: \ the character position in the file; not strictly necessary AFAIK
103: \ instead of using 0, we could use file-position and subtract
104: \ the line length
105: rdrop
106: else
107: 2r> 2drop
108: endif ;
109:
110: : put-tags-name ( -- )
111: >in @ parse-name put-tags-string >in ! ;
112:
113: ' put-tags-name is record-name
114:
115: : put-tags-entry ( -- )
116: \ write the entry for the last name to the TAGS file
117: \ if the input is from a file and it is not a local name
118: latest 0<> if
119: latest name>string put-tags-string
120: then ;
121:
122: : (tags-header) ( -- )
123: defers header
124: put-tags-entry ;
125:
126: ' (tags-header) IS header
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