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705d68deec
With KEY and EMIT being switch words, most of the high layer can be defined before drivers. In addition to this change, I've compacted core blocks which were becoming quite sparse.
17 lines
532 B
Plaintext
17 lines
532 B
Plaintext
( returns negative value on error )
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: _ ( c -- n )
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DUP '0' '9' =><= IF '0' - EXIT THEN
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DUP 'a' 'f' =><= IF 0x57 ( 'a' - 10 ) - EXIT THEN
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DROP -1 ( bad )
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;
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: _ph ( a -- n f, parse hex )
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( '0': ASCII 0x30 'x': 0x78 0x7830 )
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DUP 1+ @ 0x7830 = NOT IF 0 EXIT THEN ( a 0 )
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( We have "0x" prefix )
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DUP C@ ( a len )
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0 SWAP 1+ ( len+1 ) 3 DO ( a r )
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OVER I + C@ ( a r c ) _ ( a r n )
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DUP 0< IF 2DROP 0 UNLOOP EXIT THEN
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SWAP 4 LSHIFT + ( a r*16+n ) LOOP
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NIP 1 ;
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