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added Athlon64 benchmark result
added depth-changes.fs and hook for that in kernel/input.fs
made ~~ work in interpret state
documented clearstacks

\ source location handling

\ Copyright (C) 1995,1997,2003 Free Software Foundation, Inc.

\ This file is part of Gforth.

\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
\ of the License, or (at your option) any later version.

\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
\ GNU General Public License for more details.

\ You should have received a copy of the GNU General Public License
\ along with this program; if not, write to the Free Software
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.

\ related stuff can be found in kernel.fs

\ this stuff is used by (at least) assert.fs and debugs.fs

: loadfilename#>str ( n -- addr u )
    included-files 2@ rot min 2* cells + 2@ ;

: str>loadfilename# ( addr u -- n )
    included-files 2@ 0 ?do ( addr u included-files )
	i over >r 2* cells + 2@
	2over str= if
	    rdrop 2drop i unloop exit
	endif
	r> loop
    drop 2drop 0 ;

: current-sourcepos ( -- )
    sourcefilename  str>loadfilename# sourceline# ;

: compile-sourcepos ( compile-time: -- ; run-time: -- nfile nline )
    \ compile the current source position as literals: nfile is the
    \ source file index, nline the line number within the file.
    current-sourcepos swap postpone literal postpone literal ;

: .sourcepos ( nfile nline -- )
    \ print source position
    swap loadfilename#>str type ." :"
    base @ decimal swap 0 .r base ! ;