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collapseos/blk/450
2020-04-25 21:54:07 -04:00

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: (parseb) ( a -- n f )
( '0': ASCII 0x30 'b': 0x62 0x6230: 25136 )
DUP @ 25136 = NOT IF 0 EXIT THEN ( a 0 )
( We have "0b" prefix )
2+
0 ( a r )
BEGIN
SWAP C@+ ( r a+1 c )
DUP NOT IF 2DROP 1 EXIT THEN ( r 1 )
_ ( r a n )
DUP 0< IF ROT 2DROP 0 EXIT THEN ( a 0 )
ROT 2 * + ( a r*2+n )
AGAIN
;