collapseos/blk/362

: (parseb)          ( a -- n f )
    ( '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 ;
Move all parsing words to Inner core This allows us to get rid of the (parse*) indirection. 2020-05-03 11:21:47 +10:00			`: (parseb) ( a -- n f )`
Make string length-prefixed instead of null-terminated I'm not sure why I chose null-terminated initially. Probably because the z80asm version had null-terminated strings. Length-prefixes strings are the traditional form of strings in Forth and it's a bit easier to work with them with traditional forth words when they're under this form. 2020-05-26 10:34:52 +10:00			`( '0': ASCII 0x30 'b': 0x62 0x6230 )`
			`DUP 1+ @ 0x6230 = NOT IF 0 EXIT THEN ( a 0 )`
Move all parsing words to Inner core This allows us to get rid of the (parse*) indirection. 2020-05-03 11:21:47 +10:00			`( We have "0b" prefix )`
Make string length-prefixed instead of null-terminated I'm not sure why I chose null-terminated initially. Probably because the z80asm version had null-terminated strings. Length-prefixes strings are the traditional form of strings in Forth and it's a bit easier to work with them with traditional forth words when they're under this form. 2020-05-26 10:34:52 +10:00			`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 ;`