Thank you,
I guess I should convert double to uint64_t instead of int64_t...
The reason why I asked is because bit64 package `bit64::as.integer64(2^63)`
produces different results on my machine vs. another server. This package
converts double to int64_t directly. Looks like this is a bug in their package.
Thanks!
Best,
- Dipterix
> On Aug 11, 2021, at 11:52 PM, Simon Urbanek <simon.urba...@r-project.org>
> wrote:
>
> hing to do with R. 2^63 is too large to be represented as singed integer, so
> the behavior is undefined - to quote from the C99 specs (6.3.1.4):
>
> "If the value of the integral part cannot be represented by the integer type,
> the behavior is undefined."
>
> Your subject doesn't match your question as the uint64_t conversion is
> well-defined and the same on both platforms, but the conversion to int64_t in
> undefined
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