Is NSStreamEvent a bitfield or not?
Is NSStreamEvent a bitfield or not?
- Subject: Is NSStreamEvent a bitfield or not?
- From: "Sean McBride" <email@hidden>
- Date: Mon, 1 Nov 2010 18:01:11 -0400
- Organization: Rogue Research Inc.
Hi all,
I'm just playing with NSStream for the first time, and all the code and
docs I've seen have a switch in the implementation of
stream:handleEvent:, like:
switch(eventCode) {
case NSStreamEventHasBytesAvailable:
...
ex:
<http://developer.apple.com/library/mac/documentation/cocoa/Conceptual/
Streams/Articles/ReadingInputStreams.html#//apple_ref/doc/uid/
20002273-1001882>
Yet the docs also say this:
Stream Event Constants
One or more of these constants may be sent to the delegate as a bit
field in the second parameter of stream:handleEvent:.
typedef enum {
NSStreamEventNone = 0,
NSStreamEventOpenCompleted = 1 << 0,
NSStreamEventHasBytesAvailable = 1 << 1,
NSStreamEventHasSpaceAvailable = 1 << 2,
NSStreamEventErrorOccurred = 1 << 3,
NSStreamEventEndEncountered = 1 << 4
};
If these things can be bitwised ORed, why is all the code out there
'switch'ing? I'm confused.
Thanks,
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden