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collapseos/blk/359
Virgil Dupras 2d9a07d215 blkunpack: don't include trailing empty lines
This was becoming heavy to manage.
2020-06-23 06:52:34 -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 )
;