\ File specifiers 11jun93jaw
\ Copyright (C) 1995-1997 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., 675 Mass Ave, Cambridge, MA 02139, USA.
4 Constant w/o ( -- fam ) \ file w-o
2 Constant r/w ( -- fam ) \ file r-w
0 Constant r/o ( -- fam ) \ file r-o
: bin ( fam1 -- fam2 ) \ file
1 or ;
\ BIN WRITE-LINE 11jun93jaw
: write-line ( c-addr u fileid -- ior ) \ file
dup >r write-file
?dup IF
r> drop EXIT
THEN
#lf r> emit-file ;
\ include-file 07apr93py
: push-file ( -- ) r>
sourceline# >r loadfile @ >r
blk @ >r tibstack @ >r >tib @ >r #tib @ >r
>tib @ tibstack @ = IF r@ tibstack +! THEN
tibstack @ >tib ! >in @ >r >r ;
: pop-file ( throw-code -- throw-code )
dup IF
source >in @ sourceline# sourcefilename
error-stack dup @ dup 1+
max-errors 1- min error-stack !
6 * cells + cell+
5 cells bounds swap DO
I !
-1 cells +LOOP
THEN
r>
r> >in ! r> #tib ! r> >tib ! r> tibstack ! r> blk !
r> loadfile ! r> loadline ! >r ;
: read-loop ( i*x -- j*x )
BEGIN refill WHILE interpret REPEAT ;
: include-file ( i*x fid -- j*x ) \ file
push-file loadfile !
0 loadline ! blk off ['] read-loop catch
loadfile @ close-file swap 2dup or
pop-file drop throw throw ;
create pathfilenamebuf 256 chars allot \ !! make this grow on demand
: absolut-path? ( addr u -- flag ) \ gforth
\G a path is absolute, if it starts with a / or a ~ (~ expansion),
\G or if it is in the form ./* or ../*, extended regexp: ^[/~]|./|../
\G Pathes simply containing a / are not absolute!
over c@ '/ = >r
over c@ '~ = >r
2dup 2 min S" ./" compare 0= >r
3 min S" ../" compare 0=
r> r> r> or or or ;
: open-path-file ( c-addr1 u1 -- file-id c-addr2 u2 ) \ gforth
\G opens a file for reading, searching in the path for it (unless
\G the filename contains a slash); c-addr2 u2 is the full filename
\G (valid until the next call); if the file is not found (or in
\G case of other errors for each try), -38 (non-existant file) is
\G thrown. Opening for other access modes makes little sense, as
\G the path will usually contain dirs that are only readable for
\G the user
\ !! use file-status to determine access mode?
2dup absolut-path?
IF \ the filename contains a slash
2dup r/o open-file throw ( c-addr1 u1 file-id )
-rot >r pathfilenamebuf r@ cmove ( file-id R: u1 )
pathfilenamebuf r> EXIT
THEN
pathdirs 2@ 0
?DO ( c-addr1 u1 dirnamep )
dup >r 2@ dup >r pathfilenamebuf swap cmove ( addr u )
2dup pathfilenamebuf r@ chars + swap cmove ( addr u )
pathfilenamebuf over r> + dup >r r/o open-file 0=
IF ( addr u file-id )
nip nip r> rdrop 0 LEAVE
THEN
rdrop drop r> cell+ cell+
LOOP
0<> -&38 and throw ( file-id u2 )
pathfilenamebuf swap ;
create included-files 0 , 0 , ( pointer to and count of included files )
here ," the terminal" dup c@ swap 1 + swap , A, here 2 cells -
create image-included-files 1 , A, ( pointer to and count of included files )
\ included-files points to ALLOCATEd space, while image-included-files
\ points to ALLOTed objects, so it survives a save-system
: loadfilename ( -- a-addr )
\G a-addr 2@ produces the current file name ( c-addr u )
included-files 2@ drop loadfilename# @ 2* cells + ;
: sourcefilename ( -- c-addr u ) \ gforth
\G the name of the source file which is currently the input
\G source. The result is valid only while the file is being
\G loaded. If the current input source is no (stream) file, the
\G result is undefined.
loadfilename 2@ ;
: sourceline# ( -- u ) \ gforth sourceline-number
\G the line number of the line that is currently being interpreted
\G from a (stream) file. The first line has the number 1. If the
\G current input source is no (stream) file, the result is
\G undefined.
loadline @ ;
: init-included-files ( -- )
image-included-files 2@ 2* cells save-mem drop ( addr )
image-included-files 2@ nip included-files 2! ;
: included? ( c-addr u -- f ) \ gforth
\G true, iff filename c-addr u is in included-files
included-files 2@ 0
?do ( c-addr u addr )
dup >r 2@ 2over compare 0=
if
2drop rdrop unloop
true EXIT
then
r> cell+ cell+
loop
2drop drop false ;
: add-included-file ( c-addr u -- ) \ gforth
\G add name c-addr u to included-files
included-files 2@ 2* cells 2 cells extend-mem
2/ cell / included-files 2!
2! ;
: included1 ( i*x file-id c-addr u -- j*x ) \ gforth
\G include the file file-id with the name given by c-addr u
loadfilename# @ >r
save-mem add-included-file ( file-id )
included-files 2@ nip 1- loadfilename# !
['] include-file catch
r> loadfilename# !
throw ;
: included ( i*x addr u -- j*x ) \ file
open-path-file included1 ;
: required ( i*x addr u -- j*x ) \ gforth
\G include the file with the name given by addr u, if it is not
\G included already. Currently this works by comparing the name of
\G the file (with path) against the names of earlier included
\G files; however, it would probably be better to fstat the file,
\G and compare the device and inode. The advantages would be: no
\G problems with several paths to the same file (e.g., due to
\G links) and we would catch files included with include-file and
\G write a require-file.
open-path-file 2dup included?
if
2drop close-file throw
else
included1
then ;
\ INCLUDE 9may93jaw
: include ( "file" -- ) \ gforth
name included ;
: require ( "file" -- ) \ gforth
name required ;
\ additional words only needed if there is file support
: ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren
loadfile @ 0= IF postpone ( EXIT THEN
BEGIN
>in @
[char] ) parse nip
>in @ rot - = \ is there no delimter?
WHILE
refill 0=
IF
warnings @
IF
." warning: ')' missing" cr
THEN
EXIT
THEN
REPEAT ; immediate
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