Annotation of gforth/depth-changes.fs, revision 1.3

1.1       anton       1: \ report stack depth changes in source code in various (optional) ways
                      2: 
1.3     ! anton       3: \ Copyright (C) 2004,2007 Free Software Foundation, Inc.
1.1       anton       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
1.2       anton       9: \ as published by the Free Software Foundation, either version 3
1.1       anton      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
1.2       anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       anton      19: 
                     20: 
                     21: \ Use this program like this:
                     22: \ include it, then the program you want to check
                     23: \ e.g., start it with
                     24: \  gforth depth-changes.fs myprog.fs
                     25: 
                     26: \ By default this will report stack depth changes at every empty line
                     27: \ in interpret state.  You can vary this by using
                     28: 
                     29: \  gforth depth-changes.fs -e "' <word> IS depth-changes-filter" myprog.fs
                     30: 
                     31: \ with the following values for <word>:
                     32: 
                     33: \ <word>      meaning
                     34: \ all-lines   every line in interpret state
                     35: \ most-lines  every line in interpret state not ending with "\"
                     36: 
                     37: 2variable last-depths
                     38: 
                     39: defer depth-changes-filter ( -- f )
                     40: \G true if the line should be checked for depth changes
                     41:     
                     42: : all-lines ( -- f )
                     43:     state @ 0= ;
                     44: 
                     45: : empty-lines ( -- f )
                     46:     source (parse-white) nip 0= all-lines and ;
                     47: 
                     48: : most-lines ( -- f )
                     49:     source dup if
                     50:        1- chars + c@ '\ <>
                     51:     else
                     52:        2drop true
                     53:     endif
                     54:     all-lines and ;
                     55: 
                     56: ' empty-lines is depth-changes-filter
                     57: 
                     58: : check-line ( -- )
                     59:     depth-changes-filter if
                     60:        sp@ fp@ last-depths 2@
                     61:        2over last-depths 2!
                     62:        d<> if
                     63:            ['] ~~ execute
                     64:        endif
                     65:     endif ;
                     66: 
                     67: sp@ fp@ last-depths 2!
                     68: 
                     69: ' check-line is line-end-hook

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>