File:  [gforth] / gforth / locate.fs
Revision 1.6: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:24 2007 UTC (11 years, 9 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    1: \ locate, using the TAGS file
    2: 
    3: \ Copyright (C) 2002,2003,2007 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: require string.fs
   21: 
   22: Variable last-file
   23: Variable line-buf
   24: 
   25: \ example: invoke vi
   26: 
   27: Defer do-location
   28: 
   29: Variable sys-buf
   30: : invoke-vi ( filename u line -- ) base @ >r decimal
   31:     s" vi " sys-buf $!
   32:     0 <# bl hold #S '+ hold #> sys-buf $+!
   33:     sys-buf $+!
   34:     r> base ! sys-buf $@ system ;
   35: ' invoke-vi IS do-location
   36: 
   37: \ scan file
   38: 
   39: : tag-line ( fid -- flag ) >r
   40:     s" " line-buf $!
   41:     $100 line-buf $!len
   42:     line-buf $@ r> read-line throw
   43:     swap line-buf $!len ;
   44: : check-word ( addr u -- addr u flag )
   45:     line-buf $@ #del $split 2nip ctrl A $split 2drop
   46:     2swap search nip nip ;
   47: : get-file ( fid -- )
   48:     tag-line drop line-buf $@ ', $split 2drop last-file $! ;
   49: : print-location ( -- ) base @ >r decimal
   50:     last-file $@ line-buf $@ ctrl A $split 2nip ', $split 2drop
   51:     0. 2swap >number 2drop drop r> base !
   52:     do-location ;
   53: : locate ( "name" -- )  s" " last-file $!  bl sword
   54:     s" TAGS" r/o open-file throw >r
   55:     BEGIN  r@ tag-line  WHILE
   56:         s" " line-buf $@ str=
   57:         IF    r@ get-file
   58:         ELSE  2dup check-word
   59:             IF  print-location 2drop  r> close-file throw  EXIT  THEN
   60:         THEN
   61:     REPEAT r> close-file throw 2drop true abort" tag not found" ;

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