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|
: * m* drop ;
: s>d 1 m* ;
: / >r s>d r> _/ ;
: % >r s>d r> _% ;
: um* 0 swap 0 _uma ;
: cell+ 2 + ;
: cells 2 * ;
: . 0 sys ;
: emit 2 sys ;
: 1+ 1 + ;
: 1- 1 - ;
: ' _' drop ;
: ! 1 _! ;
: @ 1 _@ ;
: +! dup >r swap r> @ + swap ! ;
: base 0 ;
: here 1 cells @ ;
: allot 1 cells +! ;
: c! 0 _! ;
: c@ 0 _@ ;
: c, here c! 1 allot ;
: char+ 1+ ;
: chars ;
: _latest 2 cells ;
: imm _latest @ dup @ 1 5 << | swap ! ;
: immediate imm ;
: state 3 cells ;
: _compxt 4 cells ;
: _source 5 cells ;
: _sourceu 6 cells ;
: >in 7 cells ;
: _begin 8 cells 80 chars + ;
: , 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 ;
: 2drop drop drop ;
: 2dup over over ;
: 2over 3 pick 3 pick ;
: 2swap rot >r rot r> ;
: decimal 10 base ! ;
: 2r> ['] r> , ['] r> , ['] swap , ; imm
: 2>r ['] swap , ['] >r , ['] >r , ; imm
: r@ ['] r> , ['] dup , ['] >r , ; imm
: 2! swap over ! cell+ ! ;
: 2@ dup cell+ @ swap @ ;
: 0= 0 = ;
: 0< 0 < ;
: <= 2dup < >r = r> | ;
: > swap < ;
: <> = 0= ;
: begin 0 here ; imm
: while swap 1+ swap postpone if -rot ; imm
: repeat ['] _jmp , , if postpone then then ; imm
: until ['] _jmp0 , , drop ; imm
: do ['] _lit , here 0 , ['] >r , postpone 2>r here ; imm
: unloop postpone 2r> ['] 2drop , ['] r> , ['] drop , ; imm
: leave postpone 2r> ['] 2drop , ['] exit , ; imm
: +loop ['] r> , ['] 2dup , ['] + ,
postpone r@ ['] swap , ['] >r ,
['] - , ['] 2dup , ['] + , ['] over , ['] ^ ,
['] rot , ['] rot , ['] ^ , ['] & , ['] _lit , 0 ,
['] < , ['] _jmp0 , ,
postpone unloop here 1 cells - swap ! ; imm
: loop postpone 2r> ['] 1+ , ['] 2dup ,
postpone 2>r ['] = , ['] _jmp0 , ,
postpone unloop here 1 cells - swap ! ; imm
: i postpone r@ ; imm
: j postpone 2r> ['] r> , postpone r@ ['] swap ,
['] >r , ['] -rot , postpone 2>r ; imm
: aligned dup 1 cells 1- swap over & if 1 cells swap - + else drop then ;
: align here dup aligned swap - allot ;
: 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 swap drop then ;
: max 2dup <= if swap drop else drop then ;
: source _source @ _sourceu @ ;
: key _source @ >in @ +
begin dup c@ 0 = while _in repeat
c@ 1 >in +! ;
: key? _source @ >in @ + c@ 0 <> ;
: word begin key? if key else -1 then 2dup <> until
key? 0= if 2drop 0 here c! here exit then
here begin char+ swap over c! swap
key? if key else dup then
2dup <> while rot repeat
2drop here - here c! here ;
: count dup char+ swap c@ ;
: char bl word char+ c@ ;
: [char] char postpone literal ; imm
: ( begin [char] ) key <> while repeat ; 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
: ." postpone s" state @ if ['] type , else type then ; imm
: :noname here dup _compxt ! 0 , here swap ] ;
: create : here 4 cells + postpone literal postpone ; 0 , ;
: >body cell+ @ ;
: _does> >r _latest @ dup @ 31 & + cell+ aligned 2 cells +
['] _jmp over ! cell+ r> cell+ swap ! ;
: does> state @ if
['] _lit , here 2 cells + , ['] _does> , ['] exit , else
here dup _does> dup _compxt ! 0 , ] then ; imm
: variable create 1 cells allot ;
: constant create , does> @ ;
: 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 _compxt @ 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 ;
: environment? 2drop 1 0= ;
: accept over >r begin dup 0 > while
key dup 32 < if 2drop 0
else dup emit rot 2dup c! char+ swap drop swap 1- then
repeat drop r> - 1 chars / ;
: evaluate _source @ >r _sourceu @ >r >in @ >r
0 >in ! _sourceu ! _source ! _ev
r> >in ! r> _sourceu ! r> _source ! ;
: _isdigit ( ch -- bch )
dup [char] 0 over <= swap [char] 0 base @ 10 min 1- + <= and
if drop [char] 0 exit then
base @ 11 < if drop 0 exit then
base @ 36 min 10 - >r
dup [char] a over <= swap [char] a r@ + < and
if r> 2drop [char] a 10 - exit then
[char] A over <= swap [char] A r> + < and
if [char] A 10 - else 0 then ;
: >number begin dup 0 >
dup if drop over c@ _isdigit then while
>r dup c@ swap >r base @ swap
dup _isdigit - _uma
r> char+ r> 1- repeat ;
: <# 40 here c! ;
: #> 2drop here dup c@ + 40 here c@ - ;
: hold -1 here +! here dup c@ + c! ;
: # base @
>r 0 i um/mod r> swap >r um/mod r>
rot 9 over <
if 7 + then 48 + hold ;
: #s begin # 2dup or 0= until ;
: sign 0< if [char] - hold then ;
: u. 0 <# bl hold #s #> type ;
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