Re: [Cbor] Decoding of 64-bit CBOR ints on 32-bit systems

Felipe Gasper <felipe@felipegasper.com> Sat, 27 April 2019 23:19 UTC

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From: Felipe Gasper <felipe@felipegasper.com>
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Date: Sat, 27 Apr 2019 19:19:40 -0400
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To: Carsten Bormann <cabo@tzi.org>
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Subject: Re: [Cbor] Decoding of 64-bit CBOR ints on 32-bit systems
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> On Apr 27, 2019, at 6:06 PM, Carsten Bormann <cabo@tzi.org>; wrote:
> 
> Hi Felipe,
> 
>> On Apr 27, 2019, at 23:14, Felipe Gasper <felipe@felipegasper.com>; wrote:
>> 
>> 	Is there either a custom or a standard that guides interpretation of 64-bit CBOR integers on 32-bit systems that don’t have 64-bit emulation?
> 
> How to interpret this question depends a bit on what you are trying to do.  Let me try to list the possibilities:

Hi Carsten,

Thank you for your response. Please forgive my vagueness before.

I’m writing a general-purpose CBOR library in Perl XS. (The existing one doesn’t support newer Perl versions and has licensing problems for my team.)

I think what makes the most sense for me will be to consider numbers that aren’t representable in 32 bits as invalid input.

Thank you again!

-FG

p.s. The project is up at: https://github.com/FGasper/p5-CBOR-Free