\ very simple archive format 29jul2012py
\ Copyright (C) 2012 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/.
\ the intention for this format is to ship Gforth's files to
\ limited systems in a very simple format (simpler than tar)
\ so that unpacking is totally trivial.
\ File system capabilities expected are similar to vfat
\ no date stamp is given
\ the file is supposed to be compressed with zlib afterwards
\ Format of each file:
\ 32 bit len type filename\0 - counted+zero-terminated, aligned to 4 bytes
\ 32 bit size, little endian, aligend to 4 bytes
\ file contents, plus alignment to 4 bytes
\ type is:
\ 'f' for file,
\ 'd' for directory,
\ 's' for symlink (can't create now),
\ 'h' for hardlink (can't create now)
\ rules for directories are: Specify each before first use
4 buffer: fsize
: .len ( n -- ) fsize le-l! fsize 4 type ;
: .z ( -- ) 0 .len ;
: .entry ( addr u char -- addr u )
>r dup 2 + .len r> emit 2dup type 0 emit ;
: -scan ( addr u char -- addr' u' )
>r BEGIN dup WHILE 1- 2dup + c@ r@ = UNTIL THEN
wordlist constant dirs
: :dir ( addr u -- )
get-current >r dirs set-current nextname create r> set-current ;
"." :dir \ no need to create .
: ?dir ( addr u -- )
'/' -scan dup 0= IF 2drop EXIT THEN
2dup dirs search-wordlist 0= IF
'd' .entry .z :dir
: dump-a-file ( addr u -- )
2dup ?dir 'f' .entry
slurp-file dup .len 2dup type drop free throw ;
: dump-files ( -- )
BEGIN argc @ 1 > WHILE
argc @ 1 = [IF]
." call archive.fs <file list> >output" cr bye