CODEWITHSUNDEEP
javac#biginteger
getpaidsz
getpaidsz

Reputation: 13

BigInteger.intValue() equivalent in C#

I am trying to translate a java code into C# and encountered a problem working with BigInteger operations. I found several resources on BigInteger implementation in C# and the intValue itself. But no clue on BigInteger.intValue equivalent in C#. The definition in Java is:

Converts this BigInteger to an int. Thisconversion is analogous to a narrowing primitive conversion from long to int as defined in section 5.1.3 of The Java™ Language Specification:if this BigInteger is too big to fit in an int, only the low-order 32 bits are returned.Note that this conversion can lose information about theoverall magnitude of the BigInteger value as well as return a result with the opposite sign.

But getting similar results using (int) in C# results in error:

Value was either too large or too small for an Int32.

I also tried to use only the low bytes with no success It would be appreciated if someone helps

Upvotes: 1

Views: 683

Answers (1)

Konrad Rudolph
Konrad Rudolph

Reputation: 545498

To get Java’s behaviour, mask out the lower bits of the value and convert the result:

int result = (int) (uint) (bi & uint.MaxValue);

(This is using the implicit UInt32 to BigInteger conversion, and the explicit conversion for the other way round)

Upvotes: 7

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