A few different implementations of computing the current time were
spread out through the code base, most of them using gettimeofday().
This centralizes the logic in CUtil::GetTime() for easier maintenance,
and also allows all call sites to get the benefit of the clock_gettime()
code path on systems that support it.
The gettimeofday function returns 0 for success, not for failure. As a
result of the inverted logic we were losing millisecond precision when
parsing incoming messages on non-HAVE_CLOCK_GETTIME systems (macOS).
Avoids having the same loop in two places.
GetParams() was under consideration to be removed after the CMessage
porting work is done, but it's starting to look like it's here to stay.
There are cases, such as mode messages, where "get all params starting
from position N" is handy.
1a3e9ec made CMessage try to retain the colon if the original message
contained one. We should not, however, remember that when the params
are replaced entirely. Consider for example an extended-join message
that is made suitable for a client that doesn't have extended-join
capability:
CMessage msg(":nick!ident@host JOIN #chan account :real name");
msg.SetParams({msg.GetParam(0)});
msg.ToString(); // ":nick!ident@host JOIN :#chan"
Due to (intentional) lack of CFooMessage::operator=(CMessage), it was
a bit clumsy to do such copy-conversions:
CMessage Copy = Message;
CJoinMessage& JoinMsg = static_cast<CJoinMessage&>(Copy);
// ...
vs.
CJoinMessge JoinMsg;
JoinMsg.Clone(Message);
// ...
Alternatively, copy ctor(CMessage) and assignment operator=(CMessage)
could have been added to all CMessage subclasses. I've been trying to
avoid that, to make these operations very explicit. It has helped a
lot so far by preventing accidental copies.
