2009-06-01 14:21:14 -04:00
|
|
|
! Copyright (C) 2009 John Benediktsson
|
|
|
|
! See http://factorcode.org/license.txt for BSD license
|
|
|
|
|
2015-04-09 13:43:54 -04:00
|
|
|
USING: accessors assocs command-line fry io io.encodings.binary
|
|
|
|
io.files io.streams.string kernel macros math namespaces
|
2017-08-05 23:23:57 -04:00
|
|
|
peg.ebnf prettyprint sequences multiline ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
|
|
|
IN: brainfuck
|
|
|
|
|
|
|
|
<PRIVATE
|
|
|
|
|
2009-06-07 10:52:07 -04:00
|
|
|
TUPLE: brainfuck pointer memory ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2011-08-26 21:42:17 -04:00
|
|
|
: <brainfuck> ( -- brainfuck )
|
2009-06-07 10:52:07 -04:00
|
|
|
0 H{ } clone brainfuck boa ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-06 23:44:48 -04:00
|
|
|
: get-memory ( brainfuck -- brainfuck value )
|
|
|
|
dup [ pointer>> ] [ memory>> ] bi at 0 or ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-06 23:44:48 -04:00
|
|
|
: set-memory ( brainfuck value -- brainfuck )
|
|
|
|
over [ pointer>> ] [ memory>> ] bi set-at ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-07 18:21:39 -04:00
|
|
|
: (+) ( brainfuck n -- brainfuck )
|
|
|
|
[ get-memory ] dip + 255 bitand set-memory ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-07 18:21:39 -04:00
|
|
|
: (-) ( brainfuck n -- brainfuck )
|
|
|
|
[ get-memory ] dip - 255 bitand set-memory ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-06 23:44:48 -04:00
|
|
|
: (.) ( brainfuck -- brainfuck )
|
2011-10-26 13:07:04 -04:00
|
|
|
get-memory write1 ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-06 23:44:48 -04:00
|
|
|
: (,) ( brainfuck -- brainfuck )
|
2009-06-07 10:52:07 -04:00
|
|
|
read1 set-memory ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-07 18:21:39 -04:00
|
|
|
: (>) ( brainfuck n -- brainfuck )
|
2014-06-18 00:09:22 -04:00
|
|
|
'[ _ + ] change-pointer ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2011-08-26 21:42:17 -04:00
|
|
|
: (<) ( brainfuck n -- brainfuck )
|
2014-06-18 00:09:22 -04:00
|
|
|
'[ _ - ] change-pointer ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2011-08-26 21:42:17 -04:00
|
|
|
: (#) ( brainfuck -- brainfuck )
|
|
|
|
dup
|
|
|
|
[ "ptr=" write pointer>> pprint ]
|
2009-06-07 19:18:13 -04:00
|
|
|
[ ",mem=" write memory>> pprint nl ] bi ;
|
|
|
|
|
2011-08-26 21:42:17 -04:00
|
|
|
: compose-all ( seq -- quot )
|
2009-06-06 13:07:23 -04:00
|
|
|
[ ] [ compose ] reduce ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2017-08-05 23:23:57 -04:00
|
|
|
EBNF: parse-brainfuck [=[
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2014-06-18 00:09:22 -04:00
|
|
|
inc-ptr = (">")+ => [[ length '[ _ (>) ] ]]
|
|
|
|
dec-ptr = ("<")+ => [[ length '[ _ (<) ] ]]
|
|
|
|
inc-mem = ("+")+ => [[ length '[ _ (+) ] ]]
|
|
|
|
dec-mem = ("-")+ => [[ length '[ _ (-) ] ]]
|
2009-06-06 23:44:48 -04:00
|
|
|
output = "." => [[ [ (.) ] ]]
|
|
|
|
input = "," => [[ [ (,) ] ]]
|
2009-06-07 19:18:13 -04:00
|
|
|
debug = "#" => [[ [ (#) ] ]]
|
2015-07-16 11:44:59 -04:00
|
|
|
space = [ \t\n\r]+ => [[ [ ] ]]
|
2009-06-06 13:07:23 -04:00
|
|
|
unknown = (.) => [[ "Invalid input" throw ]]
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-07 19:18:13 -04:00
|
|
|
ops = inc-ptr|dec-ptr|inc-mem|dec-mem|output|input|debug|space
|
2020-05-16 13:13:10 -04:00
|
|
|
loop = "[" {loop|ops}+ "]" => [[ second compose-all '[ [ get-memory zero? ] _ until ] ]]
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2009-06-06 13:07:23 -04:00
|
|
|
code = (loop|ops|unknown)* => [[ compose-all ]]
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2017-08-05 23:23:57 -04:00
|
|
|
]=]
|
2009-06-01 14:21:14 -04:00
|
|
|
|
|
|
|
PRIVATE>
|
|
|
|
|
2015-07-19 01:16:11 -04:00
|
|
|
MACRO: run-brainfuck ( code -- quot )
|
2015-04-09 13:43:54 -04:00
|
|
|
parse-brainfuck '[ <brainfuck> @ drop flush ] ;
|
2009-06-01 14:21:14 -04:00
|
|
|
|
2011-08-26 21:42:17 -04:00
|
|
|
: get-brainfuck ( code -- result )
|
|
|
|
[ run-brainfuck ] with-string-writer ; inline
|
2015-04-09 13:43:54 -04:00
|
|
|
|
|
|
|
<PRIVATE
|
|
|
|
|
|
|
|
: (run-brainfuck) ( code -- )
|
|
|
|
[ <brainfuck> ] dip parse-brainfuck call( x -- x ) drop flush ;
|
|
|
|
|
|
|
|
PRIVATE>
|
|
|
|
|
|
|
|
: brainfuck-main ( -- )
|
|
|
|
command-line get [
|
|
|
|
contents (run-brainfuck)
|
|
|
|
] [
|
|
|
|
[ binary file-contents (run-brainfuck) ] each
|
|
|
|
] if-empty ;
|
|
|
|
|
|
|
|
MAIN: brainfuck-main
|