Subj : First-time scan pointer value
To   : Digital Man
From : Nightfox
Date : Sat Aug 06 2016 02:33 pm

  Re: First-time scan pointer value
  By: Digital Man to Nightfox on Sat Aug 06 2016 12:19:17

 >> the sub-boards, msg_area.sub[subBoardCode].scan_ptr has a very high
 >> value, 4294967295.  I'm not sure if that's valid or not.

 DM> It's not a valid message number, but it is a valid pointer value
 DM> (0xffffffff) which indicates that user's message scan pointer should point
 DM> to the *latest* message number when the msg pointers are save for the
 DM> first time (e.g. when a new user logs off). This should only occur:

 DM> 1. If you have SCFG->System->New User Values->Days of New Messages set to
 DM> 0.
 DM> 2. And a new user logs on for the first time

 DM> I think the default for "Days of New Messages" is not 0. Did you change
 DM> it? 0 is valid, but it means that a new user would see *no* new messages
 DM> when they first scan for new messages upon logging as as "new". I just
 DM> want to make sure you knew how that worked.

My "Days of New Messages" setting is 0.  I may have changed that a long time
ago; I don't remember now.

 >>I have a message reader
 >> mod I wrote in JavaScript, and it has had trouble accessing messages
 >> for new users, seemingly due to that value of scan_ptr.  I found that
 >> I can check for that value and work around it, but I still wanted to
 >> let you know in case that value is not by design.

 DM> Yes, it's by design. It was added in Nov-2015 with this commit:
 DM> http://cvs.synchro.net/cgi-bin/viewcvs.cgi/src/sbbs3/userdat.c?r1=1.160&r2
 DM> =1.16 1

I see, thanks.

Nightfox

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