66 lines
1.5 KiB
Plaintext
Executable file
66 lines
1.5 KiB
Plaintext
Executable file
0 const 0
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1 const 1
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2 const cell
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: cells cell * ;
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10 const '\n'
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13 const '\r'
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key const sp
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0x100 const F_IMMEDIATE
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: cr '\n' emit ;
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: bl sp emit ;
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: if ' BZ_ , here 0 , ; immediate
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: else ' GOTO_ , 0 , here swap ! here cell - ; immediate
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: then here swap ! ; immediate
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: begin here ; immediate
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: while ' BZ_ , here 0 , ; immediate
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: repeat ' GOTO_ , swap , here swap ! ; immediate
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: again ' GOTO_ , , ; immediate
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: until ' BZ_ , , ; immediate
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: lit ' LIT_ , , ;
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: ( begin key [ key ) lit ] = until ; immediate
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: inline| ' INLINEDATA_ , here 0 , ;
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: |inline [ ' then , ] ;
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' cells @ const $DOCOLON ( get the colon execution token )
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: :| inline| $DOCOLON , ; immediate
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: |; ' return , |inline ; immediate
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: s" state if inline| else here then
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begin key dup [ key " lit ] != over 0 != and while b, repeat drop 0 b,
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state if |inline else dup here! then ; immediate
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: interpretword F_IMMEDIATE & state not or if execute else , then ;
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: interpretnumber state if lit then ;
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: interpretunknown type s" ?" type cr ;
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: compileword lookup dup
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if interpretword
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else drop number
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if interpretnumber
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else interpretunknown
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then
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then ;
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: interpreter
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begin word dup b@ while compileword repeat drop ;
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: loadfp ( fp -- fp )
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infile @ >r
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infile !
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interpreter
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infile @
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<r infile ! ;
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: loadfile ( filename -- ) open loadfp close ;
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( image loading )
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: noop ;
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: defer new-word $DODEFERRED , ' noop , ;
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: redefine ( cp cpdeferred ) cell + ! ;
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: definition ( cpdeferred ) cell + @ ;
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