Is there a method to not utilise the 3bit Tag so the full fixed32 is used.

[Jared Leendertz]

Hello, New to protocol buffer, tying to implement a read write from buffer that easily encodes and decodes messages types from a SISO standard. I noticed the https://protobuf.dev/programming-guides/encoding/#cheat-sheet

encoding standard indicates that 3 bits are missing from the variables value range in each field on a message. If im implementing to a specific standard with fixed sizes is Protocol Buffer suitable? given a fixed32 appears to be a 29bit field.

I confirmed my worries as i was trying to set default values to 0xFFFFFFFF but would get the error Integer out of range.

Should I be using something else or is there a configuration that allows me to have more control of the size of my variables and how i want to use them?

[Marc Gravell]

A tag isn't on a value - it is part of the *field header* which is the combination of field-number and wire-type ; a fixed32 *value* is 32 bits.

The sizes of values aren't directly controllable by you; protobuf-net isn't a general purpose binary descriptor format and cannot usually be used to implement specific pre-existing standards that aren't related to protobuf.

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[Jared Leendertz]

Understood, thanks for the explanation. Unfortunately, this makes protobuf not suitable. Any suggestions for open-source libraries that would help minimize serialization code?

[Marc Gravell]

Without more context that is unanswerable. What target language/runtime/framework? What target scenarios / encoding / wire format? But in my experience: most libraries are opinionated and aimed at a specific serialization scenario. If your scenario is different and no library exists: it may be bespoke, and/or you might get to become the missing library author.

Marc

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Regards,

Marc

[Derek Perez]

I don’t believe protobuf is what you wanna use if you need that level of control. 

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