Annotation of gforth/etags.fs, revision 1.4
1.1 anton 1: \ Etags support for GNU Forth.
2:
1.3 anton 3: \ Copyright (C) 1995 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 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
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21:
1.1 anton 22: \ This does not work like etags; instead, the TAGS file is updated
23: \ during the normal Forth interpretation/compilation process.
24:
25: \ The present version has several shortcomings: It always overwrites
26: \ the TAGS file instead of just the parts corresponding to the loaded
27: \ files, but you can have several tag tables in emacs. Every load
28: \ creates a new etags file and the user has to confirm that she wants
29: \ to use it.
30:
31: \ Communication of interactive programs like emacs and Forth over
32: \ files is clumsy. There should be better cooperation between them
33: \ (e.g. via shared memory)
34:
35: \ This is ANS Forth with the following serious environmental
36: \ dependences: the variable LAST must contain a pointer to the last
37: \ header, NAME>STRING must convert that pointer to a string, and
38: \ HEADER must be a deferred word that is called to create the name.
39:
40: : tags-file-name ( -- c-addr u )
41: \ for now I use just TAGS; this may become more flexible in the
42: \ future
43: s" TAGS" ;
44:
45: variable tags-file 0 tags-file !
46:
47: create tags-line 128 chars allot
48:
49: : skip-tags ( file-id -- )
50: \ reads in file until it finds the end or the loadfilename
51: drop ;
52:
53: : tags-file-id ( -- file-id )
54: tags-file @ 0= if
55: tags-file-name w/o create-file throw
56: \ 2dup file-status
57: \ if \ the file does not exist
58: \ drop w/o create-file throw
59: \ else
60: \ drop r/w open-file throw
61: \ dup skip-tags
62: \ endif
63: tags-file !
64: endif
65: tags-file @ ;
66:
67: create emit-file-char 0 c,
68:
69: : emit-file ( c file-id -- )
70: swap emit-file-char c!
71: emit-file-char 1 chars rot write-file ;
72:
73: 2variable last-loadfilename 0 0 last-loadfilename 2!
74:
75: : put-load-file-name ( file-id -- )
76: >r
1.4 ! anton 77: sourcefilename last-loadfilename 2@ d<>
1.1 anton 78: if
79: #ff r@ emit-file throw
80: #lf r@ emit-file throw
1.4 ! anton 81: sourcefilename 2dup
1.1 anton 82: r@ write-file throw
83: last-loadfilename 2!
84: s" ,0" r@ write-line throw
85: endif
86: rdrop ;
87:
88: : put-tags-entry ( -- )
89: \ write the entry for the last name to the TAGS file
90: \ if the input is from a file and it is not a local name
91: source-id dup 0<> swap -1 <> and \ input from a file
92: get-current locals-list <> and \ not a local name
93: last @ 0<> and \ not an anonymous (i.e. noname) header
94: if
95: tags-file-id >r
96: r@ put-load-file-name
97: source drop >in @ r@ write-file throw
98: 127 r@ emit-file throw
1.2 pazsan 99: bl r@ emit-file throw
1.1 anton 100: last @ name>string r@ write-file throw
1.2 pazsan 101: bl r@ emit-file throw
1.1 anton 102: 1 r@ emit-file throw
1.4 ! anton 103: base @ decimal sourceline# 0 <# #s #> r@ write-file throw base !
1.1 anton 104: s" ,0" r@ write-line throw
105: \ the character position in the file; not strictly necessary AFAIK
106: \ instead of using 0, we could use file-position and subtract
107: \ the line length
108: rdrop
1.2 pazsan 109: endif cr ;
1.1 anton 110:
111: : (tags-header) ( -- )
112: defers header
113: put-tags-entry ;
114:
115: ' (tags-header) IS header
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