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 372variable last-depths 38 39defer 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 67sp@ fp@ last-depths 2! 68 69' check-line is line-end-hook 70