File:  [gforth] / gforth / tags.fs
Revision 1.1: download - view: text, annotated - select for diffs
Sun Jun 2 21:19:09 2002 UTC (17 years, 4 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Added tags.
Security fix in httpd.fs
Documentation for directory access in prim

    1: \ VI tags support for GNU Forth.
    2: 
    3: \ Copyright (C) 1995,1998 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: 
   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: \ Changes by David: Removed the blanks before and after the explicit
   41: \ tag name, since that conflicts with Emacs' auto-completition. In
   42: \ fact those blanks are not necessary, since search is performed on
   43: \ the tag-text, rather than the tag name.
   44: 
   45: require search.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 r@ write-file throw
   80:     #tab r> emit-file throw ;
   81: 
   82: : put-tags-entry ( -- )
   83:     \ write the entry for the last name to the TAGS file
   84:     \ if the input is from a file and it is not a local name
   85:     source-id dup 0<> swap -1 <> and	\ input from a file
   86:     current @ locals-list <> and	\ not a local name
   87:     last @ 0<> and	\ not an anonymous (i.e. noname) header
   88:     if
   89: 	tags-file-id >r 
   90: 	r@ put-load-file-name
   91: 	last @ name>string r@ write-file throw
   92: 	#tab r@ emit-file throw
   93: 	s" /^" r@ write-file throw
   94: 	source drop >in @ r@ write-file throw
   95: 	s" $/" r@ write-line throw
   96: 	rdrop
   97:     endif ;
   98: 
   99: : (tags-header) ( -- )
  100:     defers header
  101:     put-tags-entry ;
  102: 
  103: ' (tags-header) IS header

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