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collapseos/blk/361
Virgil Dupras a348ee9106 Remove Extra words
The few extra bytes they save in the core aren't worth the extra
complexity. This was initially done in a context where I had
troubles keeping the RC2014 binary with SDC inside the 8K limit.

At this point, even with the few extra bytes we add here, we're at
7200 bytes, so I'd say we're fine.
2020-09-21 14:51:46 -04:00

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( returns negative value on error )
: _ ( c -- n )
DUP '0' '9' =><= IF '0' - EXIT THEN
DUP 'a' 'f' =><= IF 0x57 ( 'a' - 10 ) - EXIT THEN
DROP -1 ( bad )
;
: _ph ( a -- n f, parse hex )
( '0': ASCII 0x30 'x': 0x78 0x7830 )
DUP 1+ @ 0x7830 = NOT IF 0 EXIT THEN ( a 0 )
( We have "0x" 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 4 LSHIFT + ( a r*16+n ) LOOP
NIP 1 ;