Annotation of gforth/tags.fs, revision 1.1
1.1 ! pazsan 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
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>