6 lines
206 B
Text
6 lines
206 B
Text
: powmod(base, exponent, modulus)
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1 exponent dup ifZero: [ return ]
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while ( dup 0 > ) [
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dup isEven ifFalse: [ swap base * modulus mod swap ]
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2 / base sq modulus mod ->base
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] drop ;
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