[gforth] / gforth / depth-changes.fs  

gforth: gforth/depth-changes.fs

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