value_string from file

[Jeroen Sack <JSack () lely com>]

Hi,

I am developing a dissector for ISO11783 (ISObus) which is using object 
IDs which are constant per application. I have a file where these values 
are defined which I would like to read in my dissector so it is easier to 
see what is happening. What I was wondering about if this has been done 
before already and if not would it be advisable to do this or can I better 
display numbers and let the conversion up to the user?

The way I would like to implement it is as follows:
- Define a way to define the number to string definition, most likely csv
- Add an option in preferences to indicate where this file is located
- At startup or change of setting read this file and generate a 
string_value object

At the moment the amount of values is around 5000, but the protocol 
supports 65534 values. We would like to make this dissector available for 
public use as soon as it is ready.

Best regards,
Jeroen Sack (Lely Industries N.V.)

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