File:  [gforth] / gforth / depth-changes.fs
Revision 1.3: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:24 2007 UTC (11 years, 7 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    1: \ report stack depth changes in source code in various (optional) ways
    2: 
    3: \ Copyright (C) 2004,2007 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: 
   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

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