mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-27 17:58:06 +11:00
16 lines
480 B
Plaintext
16 lines
480 B
Plaintext
( returns negative value on error )
|
|
: _ ( c -- n )
|
|
DUP '0' '1' =><= IF '0' - EXIT THEN
|
|
DROP -1 ( bad )
|
|
;
|
|
: _pb ( a -- n f, parse binary )
|
|
( '0': ASCII 0x30 'b': 0x62 0x6230 )
|
|
DUP 1+ @ 0x6230 = NOT IF 0 EXIT THEN ( a 0 )
|
|
( We have "0b" prefix )
|
|
DUP C@ ( a len )
|
|
0 SWAP 1+ ( len+1 ) 3 DO ( a r )
|
|
OVER I + C@ ( a r c ) _ ( a r n )
|
|
DUP 0< IF 2DROP 0 UNLOOP EXIT THEN
|
|
SWAP 1 LSHIFT + ( a r*2+n ) LOOP
|
|
NIP 1 ;
|