\ source location handling
\ Copyright (C) 1995,1997,2003,2004,2007,2009 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 3
\ 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, see http://www.gnu.org/licenses/.
\ 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
drop 2drop 0 ;
\ we encode line and character in one cell to keep the interface the same
: encode-pos ( nline nchar -- npos )
$ff min swap 8 lshift + ;
: decode-pos ( npos -- nline nchar )
dup 8 rshift swap $ff and ;
: current-sourcepos ( -- nfile npos )
sourcefilename str>loadfilename# sourceline# >in @ encode-pos ;
: compile-sourcepos ( compile-time: -- ; run-time: -- nfile npos )
\ compile the current source position as literals: nfile is the
\ source file index, nline the line number within the file.
swap postpone literal
postpone literal ;
: .sourcepos ( nfile npos -- )
\ print source position
swap loadfilename#>str type ': emit
base @ decimal
swap decode-pos swap 0 .r ': emit 0 .r
base ! ;