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|
: * m* drop ;
: s>d 1 m* ;
: / >r s>d r> _/ ;
: % >r s>d r> _% ;
: cell+ 2 + ;
: cells 2 * ;
: . 0 sys ;
: emit 1 sys ;
: u. 4 sys ;
: 1+ 1 + ;
: 1- 1 - ;
: ' _' drop ;
: ! 1 _! ;
: @ 1 _@ ;
: +! dup >r swap r> @ + swap ! ;
: base 0 ;
: here 1 cells @ ;
: allot 1 cells +! ;
: _latest 2 cells ;
: imm _latest @ dup @ 1 5 << | swap ! ;
: immediate imm ;
: state 3 cells ;
: _input 4 cells ;
: , here ! 1 cells allot ;
: [ 0 state ! ; imm
: ] 1 state ! ;
: literal [ ' _lit dup , , ] , , ; imm
: ['] ' [ ' literal , ] ; imm
: if ['] _jmp0 , here 0 , ; imm
: then here swap ! ; imm
: else ['] _jmp , here 0 , swap here swap ! ; imm
: postpone _' dup 0 = if exit then
1 = swap ['] _lit , , if ['] execute ,
else ['] , , then ; imm
: over 1 pick ;
: rot >r swap r> swap ;
: -rot rot rot ;
: nip swap drop ;
: tuck swap over ;
: 2drop drop drop ;
: 2dup over over ;
: 2over 3 pick 3 pick ;
: 2swap rot >r rot r> ;
: c! 0 _! ;
: c@ 0 _@ ;
: c, here c! 1 allot ;
: char+ 1+ ;
: chars ;
: decimal 10 base ! ;
: hex 16 base ! ;
: 2r> ['] r> , ['] r> , ['] swap , ; imm
: 2>r ['] swap , ['] >r , ['] >r , ; imm
: 2r@ ['] r> , ['] r> , ['] 2dup , ['] >r , ['] >r , ['] swap , ; imm
: r@ ['] r> , ['] dup , ['] >r , ; imm
: 2! swap over ! cell+ ! ;
: 2@ dup cell+ @ swap @ ;
: 0= 0 = ;
: 0< 0 < ;
: <= 2dup < >r = r> | ;
: > swap < ;
: <> = 0= ;
: 0<> 0= 0= ;
: 0> 0 > ;
: begin 0 here ; imm
: while swap 1+ swap postpone if -rot ; imm
: repeat ['] _jmp , , if postpone then then ; imm
: until ['] _jmp0 , , drop ; imm
: again postpone repeat ; imm
: do ['] _lit , here 0 , ['] >r , postpone 2>r here ; imm
: ?do ['] 2dup , ['] _lit , here 0 , ['] >r , ['] = , postpone if
['] 2drop , postpone 2r> ['] drop , ['] >r , ['] exit ,
postpone then postpone 2>r here ; imm
: unloop postpone 2r> ['] 2drop , ['] r> , ['] drop , ; imm
: leave postpone 2r> ['] 2drop , postpone 2r>
['] drop , ['] >r , ['] exit , ; imm
: +loop postpone 2r> ['] 2dup , ['] swap , ['] < , ['] >r ,
['] rot , ['] + , ['] 2dup , ['] swap , ['] < ,
['] r> , ['] ^ , ['] -rot ,
postpone 2>r ['] _jmp0 , ,
postpone unloop here swap ! ; imm
: loop postpone 2r> ['] 1+ , ['] 2dup ,
postpone 2>r ['] = , ['] _jmp0 , ,
postpone unloop here swap ! ; imm
: i postpone r@ ; imm
: j postpone 2r> ['] r> , postpone r@ ['] swap ,
['] >r , ['] -rot , postpone 2>r ; imm
: align here 1 cells 1- tuck & if 1 cells swap - allot else drop then ;
: aligned dup 1 cells 1- tuck & if 1 cells swap - + else drop then ;
: and & ;
: or | ;
: xor ^ ;
: lshift << ;
: rshift >> ;
: invert -1 ^ ;
: mod % ;
: 2* 2 * ;
: _msb 1 1 cells 8 * 1- << ;
: 2/ dup 1 >> swap 0< if _msb or then ;
: /mod 2dup % -rot / ;
: */ >r m* r> _/ ;
: sm/rem >r 2dup r@ _% -rot r> _/ ;
: */mod >r m* r> sm/rem ;
: fm/mod 2dup dup >r ^ >r sm/rem swap dup
if r> 0< if r> + swap 1- else swap r> drop then
else swap 2r> 2drop then ;
: cr 10 emit ;
: bl 32 ;
: space bl emit ;
: spaces begin dup 0 > while space 1- repeat drop ;
: ?dup dup if dup then ;
: negate -1 * ;
: abs dup 0< if negate then ;
: min 2dup <= if drop else nip then ;
: max 2dup <= if nip else drop then ;
: key begin _input @ dup 0 <= while drop _in repeat
dup 1- _input !
_input cell+ 80 chars + swap - c@ ;
: word here dup >r char+ >r
begin key 2dup <> while
r> tuck c! char+ >r repeat
2drop r> r> tuck - 1- over c! ;
: count dup char+ swap c@ ;
: char bl word char+ c@ ;
: [char] char postpone literal ; imm
: ( begin [char] ) key <> while repeat ; imm
: \ _input @ begin dup 0 > while key drop 1- repeat drop ; imm
: type begin dup 0 > while swap dup c@ emit char+ swap 1- repeat 2drop ;
: s" state @ if ['] _jmp , here 0 , then
[char] " word count
state @ 0= if exit then
dup cell+ allot
rot here swap !
swap postpone literal postpone literal ; imm
: c" state @ if ['] _jmp , here 0 , then
[char] " word
state @ 0= if exit then
dup count nip allot
here rot !
postpone literal ; imm
: ." postpone s" state @ if ['] type , else type then ; imm
: .( [char] ) word count type ; imm
: create align here
1 cells 1 chars - allot
bl word count nip
1 chars allot
tuck over ! swap allot align
['] _lit , here 3 cells + , ['] exit dup , ,
dup @ 31 & over _latest @ - 6 << or over ! _latest ! ;
: _does> _latest @ dup @ 31 & + cell+ aligned 2 cells +
['] _jmp over ! cell+
r@ 1 cells - @ swap ! ;
: does> ['] _jmp , here 2 cells + dup , 2 cells + ,
['] _does> , ['] exit , ; imm
: >body cell+ @ ;
: compile, postpone literal postpone execute ;
: buffer: create allot ;
: variable create 1 cells allot ;
: constant create , does> @ ;
: value constant ;
: to ' 4 cells + state @ if postpone literal ['] ! , else ! then ; imm
: defer create does> @ execute ;
: defer@ >body @ ;
: defer! >body ! ;
: is state @ if postpone ['] postpone defer! else ' defer! then ; imm
: action-of state @ if postpone ['] postpone defer@ else ' defer@ then ; imm
-1 constant true
0 constant false
: >in _input 80 chars + cell+ _input @ - 4 chars - ;
: source _input @ 6 chars + >in 3 chars - swap ;
: quit begin _rdepth 1 > while r> drop repeat postpone [ ;
: abort begin depth 0 > while drop repeat quit ;
: abort" postpone s" ['] rot ,
postpone if ['] type , ['] abort ,
postpone else ['] 2drop , postpone then ; imm
: recurse depth 1- pick dup @ 31 & + cell+ aligned , ; imm
: move dup 0 <= if drop 2drop exit then
>r 2dup < r> swap if
1- 0 swap do over i + c@ over i + c! -1 +loop
else
0 do over i + c@ over i + c! loop
then 2drop ;
: fill -rot begin dup 0 > while
>r 2dup c! char+ r> 1- repeat
2drop drop ;
: erase begin dup 0 > while swap 0 over ! 1+ swap 1- repeat ;
: roll dup if swap >r 1- recurse r> swap exit then drop ;
: environment? 2drop false ;
: accept over >r begin dup 0 > while
key dup 32 < if 2drop 0
else dup emit rot 2dup c! char+ nip swap 1- then
repeat drop r> - 1 chars / ;
: marker create _latest @ , here , does>
dup @ _latest ! cell+ @ here swap - allot ;
: :noname 0 , here ] ;
|
