Annotation of gforth/locate.fs, revision 1.3

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

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