[tor-bugs] #17949 [Tor]: Make loopback address search more efficient

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#17949: Make loopback address search more efficient
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 Reporter:  teor                    |          Owner:  rl1987
     Type:  enhancement             |         Status:  needs_review
 Priority:  Medium                  |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor                     |        Version:
 Severity:  Normal                  |     Resolution:
 Keywords:  easy TorCoreTeam201602  |  Actual Points:
Parent ID:  #17991                  |         Points:  medium
  Sponsor:                          |
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Comment (by teor):

 Replying to [comment:15 bugzilla]:
 > {{{int}}} for {{{bool}}}, no tests for {{{loopback != 0}}}, ok?

 We don't use `bool` anywhere else in the codebase. This isn't the place to
 start.
 And `if (loopback)` is equivalent to `if (loopback != 0)`.

 (If you really want a one-bit field, `bool` isn't sufficient, as it's 8
 bits or more. You need a one-bit bitfield in a struct. Which is more
 trouble than it's worth, unless you already have a struct.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17949#comment:16>
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