[tor-bugs] #31475 [Core Tor/Tor]: config: stop using atof()

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#31475: config: stop using atof()
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 Reporter:  nickm         |          Owner:  nickm
     Type:  defect        |         Status:  needs_revision
 Priority:  Low           |      Milestone:  Tor: 0.4.2.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:  0.5
 Reviewer:                |        Sponsor:
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Comment (by nickm):

 I agree with your observation about overflow/underflow: I'll try to fix
 those.

 I don't think that checking the return value for 0 is a good idea though,
 for two reasons:
   1. Our compilers give warnings when you do an `==` comparison with two
 doubles, so we'd have to work around that.
   2. My understanding is that the only way that `*endptr` can be equal to
 `nptr` is if no input is converted at all. If any input is converted, then
 `*endptr` points to the first unconverted byte.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31475#comment:6>
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