version 1.7, 1998/12/08 22:02:51
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version 1.23, 2011/12/31 15:29:25
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\ source location handling |
\ source location handling |
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\ Copyright (C) 1995,1997 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1997,2003,2004,2007,2009,2011 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
\ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
\ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
\ of the License, or (at your option) any later version. |
\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
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\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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\ related stuff can be found in kernel.fs |
\ related stuff can be found in kernel.fs |
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\ this stuff is used by (at least) assert.fs and debugging.fs |
\ this stuff is used by (at least) assert.fs and debugs.fs |
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require struct.fs |
: loadfilename#>str ( n -- addr u ) |
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included-files 2@ rot min 2* cells + 2@ ; |
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struct |
: str>loadfilename# ( addr u -- n ) |
cell% field sourcepos-name# |
included-files 2@ 0 ?do ( addr u included-files ) |
cell% field sourcepos-line# |
i over >r 2* cells + 2@ |
end-struct sourcepos |
2over str= if |
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rdrop 2drop i unloop exit |
: sourcepos, ( -- ) |
endif |
\ record the current source position HERE |
r> loop |
loadfilename# @ , sourceline# , ; |
drop 2drop -1 ; |
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: get-sourcepos ( a-addr -- c-addr u n ) |
\ we encode line and character in one cell to keep the interface the same |
\ c-addr u is the filename, n is the line number |
: encode-pos ( nline nchar -- npos ) |
dup sourcepos-name# @ loadfilename#>str |
$ff min swap 8 lshift + ; |
rot sourcepos-line# @ ; |
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: decode-pos ( npos -- nline nchar ) |
: print-sourcepos ( a-addr -- ) |
dup 8 rshift swap $ff and ; |
get-sourcepos |
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>r type ." :" |
: current-sourcepos ( -- nfile npos ) |
base @ decimal r> 0 .r base ! ; |
sourcefilename str>loadfilename# sourceline# >in @ encode-pos ; |
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: compile-sourcepos ( compile-time: -- ; run-time: -- nfile npos ) |
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\ compile the current source position as literals: nfile is the |
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\ source file index, nline the line number within the file. |
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current-sourcepos |
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swap postpone literal |
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postpone literal ; |
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: .sourcepos ( nfile npos -- ) |
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\ print source position |
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swap loadfilename#>str type ': emit |
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base @ decimal |
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swap decode-pos swap 0 .r ': emit 0 .r |
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base ! ; |
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: save-source-filename ( c-addr1 u1 -- c-addr2 u2 ) |
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\ c-addr1 u1 is a temporary string for a file name, c-addr2 u2 is |
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\ a permanent one. Reuses strings for the same file names and |
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\ adds them to the included files (not sure if that's a good idea) |
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2dup str>loadfilename# dup 0< if |
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drop save-mem 2dup add-included-file |
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else |
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nip nip loadfilename#>str |
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then ; |
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: #line ( "u" "["file"]" -- ) |
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\g Set the line number to @i{u} and (if present) the file name to @i{file}. Consumes the rest of the line. |
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\g |
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parse-name ['] evaluate 10 base-execute 1- loadline ! |
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'"' parse 2drop '"' parse dup if |
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save-source-filename loadfilename 2! |
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else |
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2drop |
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then |
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postpone \ ; |