mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-30 05:38:05 +11:00
7 lines
178 B
Plaintext
7 lines
178 B
Plaintext
|
( 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 )
|
||
|
|
;
|