Control over int encoding

[waalge]

Is there a way to force the encoder to only use bigint, and always use most compact representation?

The only number I'm handling are ints, and typically using bigint since they may be large.

I want the encoding in JS to be the same as say an implementation in rust, in which int are encoded in the most compact form.

When I try to encode 1n I get

encoder.encode(1n).toString("hex")
// '1b0000000000000001'

But i want it to say 1. I get this helpful for round tripping.

In this case I can convert to Number

encoder.encode(Number(1n)).toString("hex")
//'01'

This is what I want.
However the same does not work for

encoder.encode(Number(-4294967296n)).toString("hex")
//'fbc1f0000000000000'

whereas I would like it to 3AFFFFFFFF

[waalge]

I've looked at this a bit more.

cbor-x/encode.js

Line 416 in f531383

} else if (!this.alwaysUseFloat && value >> 0 === value) { // negative integer

This condition is value >> 0 === value fails if value < -2 ** 31.
I want it to be true up to value > - (2 **32)

Apart from this window [- 2**32, -2 ** 31], manually switching to number and back again works

[waalge]

This does not look right

> decode(Buffer.from("3affffffff", "hex"))
0