[tor-bugs] #23368 [Core Tor/Tor]: Add design and coding guidelines for using floating point

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#23368: Add design and coding guidelines for using floating point
------------------------------+--------------------------------
     Reporter:  teor          |      Owner:  (none)
         Type:  enhancement   |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.2.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  doc, tor-safety
Actual Points:                |  Parent ID:
       Points:  0.5           |   Reviewer:
      Sponsor:                |
------------------------------+--------------------------------
 We should add these to a document in doc/HACKING:

 1. Don't use floats.
 2. If you must use floats, document how the limits of floating point
 precision and calculation accuracy affect function outputs.
 3. Remember that different environments can get different results from the
 same floating point calculations. So you can't use floats in anything that
 needs to be deterministic, like consensus generation.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23368>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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