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collapseos/blk/400

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: (parseh) ( a -- n f )
( '0': ASCII 0x30 'x': 0x78 0x7830: 30768 )
DUP @ 30768 = NOT IF 0 EXIT THEN ( a 0 )
( We have "0x" 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 16 * + ( a r*16+n )
AGAIN
;