How to handle integers too large for uint64_t in a synchronous Dart native extension?

Question

When the user passes a number larger than 2^64 - 1 to a native function then the integer can't fit into a unit64_t.

What is the simplest way to write a synchronous native extension that can handle integers of arbitrarily large size? Since it appears we must use the Dart_Embedding API to retrieve values from a Dart_NativeArguments instance, how do we retrieve these values without loss of precision?

"handle values of this size" is unclear. All you have said is that the number is larger than "2^64 - 1". You have not specified an upper bound - or it it boundless? If you only need 65-bit precision [long double](https://en.wikipedia.org/wiki/Long_double) may work for you. — chux - Reinstate Monica, Jun 22 '15 at 17:38

score 0 · Answer 1 · answered Jun 22 '15 at 20:18

0

Blasphemous suggestion: pass it as a string ? ;-)

Or [de]mangle it into/out of byte array ?

answered Jun 22 '15 at 20:18

carlo_kokoth

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How to handle integers too large for uint64_t in a synchronous Dart native extension?

1 Answers1