Annotation of gforth/locate.fs, revision 1.2

1.1       pazsan      1: \ locate, using the TAGS file
                      2: 
                      3: require string.fs
                      4: 
                      5: Variable last-file
                      6: Variable line-buf
                      7: 
                      8: \ example: invoke vi
                      9: 
                     10: Defer do-location
                     11: 
                     12: Variable sys-buf
                     13: : invoke-vi ( filename u line -- ) base @ >r decimal
                     14:     s" vi " sys-buf $!
                     15:     0 <# bl hold #S '+ hold #> sys-buf $+!
                     16:     sys-buf $+!
                     17:     r> base ! sys-buf $@ system ;
                     18: ' invoke-vi IS do-location
                     19: 
                     20: \ scan file
                     21: 
                     22: : tag-line ( fid -- flag ) >r
                     23:     s" " line-buf $!
                     24:     $100 line-buf $!len
                     25:     line-buf $@ r> read-line throw
                     26:     swap line-buf $!len ;
                     27: : check-word ( addr u -- addr u flag )
                     28:     line-buf $@ #del $split 2nip ctrl A $split 2drop
                     29:     2swap search nip nip ;
                     30: : get-file ( fid -- )
                     31:     tag-line drop line-buf $@ ', $split 2drop last-file $! ;
                     32: : print-location ( -- ) base @ >r decimal
                     33:     last-file $@ line-buf $@ ctrl A $split 2nip ', $split 2drop
                     34:     0. 2swap >number 2drop drop r> base !
                     35:     do-location ;
                     36: : locate ( "name" -- )  s" " last-file $!  bl sword
                     37:     s" TAGS" r/o open-file throw >r
                     38:     BEGIN  r@ tag-line  WHILE
1.2     ! anton      39:         s" " line-buf $@ str=
1.1       pazsan     40:         IF    r@ get-file
                     41:         ELSE  2dup check-word
                     42:             IF  print-location 2drop  r> close-file throw  EXIT  THEN
                     43:         THEN
                     44:     REPEAT r> close-file throw 2drop true abort" tag not found" ;

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