Hi Sake, Le lun. 17 juin 2019 à 07:10, Sake Blok | SYN-bit <sake.b...@syn-bit.nl> a écrit :
> Hi, > > I'm working on a patch to add the possibility to show times in milli- or > microsecond units. While working this out, I see a need to change the name > of certain preferences and/or change the values of other preferences. This > will however break compatibility with older versions of Wireshark in > reading/writing the preferences (in my case, settings in the "recent" file). > > Is there a way to add backwards compatibility in preference items by > converting old preference settings into new ones? > And is there a way to add code to the current versions to do the reverse > for forward compatibility, so at least future minor versions of old major > versions will be able to handle this correctly? > > Things that I might want to change are: > > # Timestamp display precision. > # One of: AUTO, SEC, DSEC, CSEC, MSEC, USEC, NSEC > gui.time_precision: MSEC > > to: > > # Timestamp display precision. > # One of: AUTO, 0DECIMALS, 1DECIMAL, 2DECIMALS, 3DECIMALS, 6DECIMALS, > 9DECIMALS > gui.time_precision: AUTO > > and > > # Seconds display format. > # One of: SECONDS, HOUR_MIN_SEC > gui.seconds_format: SECONDS > > to > > # Seconds display format. > # One of: SECONDS, MILLISECONDS, MICROSECONDS, HOUR_MIN_SEC > gui.time_units: SECONDS > > Are there some guidelines available in handling preferences between > wireshark versions? > You can find some code handling preferences rename in epan/prefs.c file, set_pref() function. This is probably the right place to put some conversion code between the old and new format. Cheers, Pascal.
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