why long long?

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why long long?

by Chris Frey-2 :: Rate this Message:

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Hi,

While reading the opensync API from the application perspective, group
members are referred to by their ID, and this ID is a long long int.

In output from commands such as osynctool --showgroup GroupName, these
ID numbers start from 1.

Why is the member ID so large?  Is there really a risk of 9223372036854775807
different members?

The reason I ask is that 'long long' is not as portable as just long, and
there is no reason for such a large number, as far as I can see.

Thanks,
- Chris


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Re: why long long?

by Daniel Gollub-3 :: Rate this Message:

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On Friday 09 October 2009 09:35:59 pm Chris Frey wrote:
> Why is the member ID so large?  Is there really a risk of
>  9223372036854775807 different members?
>
> The reason I ask is that 'long long' is not as portable as just long, and
> there is no reason for such a large number, as far as I can see.
>

No idea, this was introduced long before i joined the OpenSync development.
We should have a look into the subversion logs if Armin mentioned any reason
to use long long ...

How many public member/group interfaces are using long long?

Best Regards,
Daniel


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Re: why long long?

by Henrik /KaarPoSoft :: Rate this Message:

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Daniel Gollub wrote:

> On Friday 09 October 2009 09:35:59 pm Chris Frey wrote:
>  
>> Why is the member ID so large?  Is there really a risk of
>>  9223372036854775807 different members?
>>
>> The reason I ask is that 'long long' is not as portable as just long, and
>> there is no reason for such a large number, as far as I can see.
>>    
>
> No idea, this was introduced long before i joined the OpenSync development.
> We should have a look into the subversion logs if Armin mentioned any reason
> to use long long ...
>
> How many public member/group interfaces are using long long?
>
>  
If we really want to stick to the frozen interface, we could use gint64
http://library.gnome.org/devel/glib/stable/glib-Basic-Types.html#gint64

(This would be "binary compatible" with current API for most platforms I
guess,
yet be more portable).

However, I guess that long int should be more than enough...

/Henrik

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Re: why long long?

by Chris Frey-2 :: Rate this Message:

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On Sat, Oct 10, 2009 at 12:40:08PM +0200, Daniel Gollub wrote:

> On Friday 09 October 2009 09:35:59 pm Chris Frey wrote:
> > Why is the member ID so large?  Is there really a risk of
> >  9223372036854775807 different members?
> >
> > The reason I ask is that 'long long' is not as portable as just long, and
> > there is no reason for such a large number, as far as I can see.
> >
>
> No idea, this was introduced long before i joined the OpenSync development.
> We should have a look into the subversion logs if Armin mentioned any reason
> to use long long ...
>
> How many public member/group interfaces are using long long?

Sorry for the delay on this.

This command shows about 22 functions:

        find . -type f -name "*.h" -print0 | \
                xargs -0 grep "long *long" | \
                grep EXPORT | \
                wc -l

There are also things like misc/schemas/capabilities.xsd that have
longlong and ulonglong for things such as AdvancedType.

- Chris




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Re: why long long?

by Chris Frey-2 :: Rate this Message:

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On Sat, Oct 10, 2009 at 01:39:08PM +0200, Henrik /KaarPoSoft wrote:
> If we really want to stick to the frozen interface, we could use gint64
> http://library.gnome.org/devel/glib/stable/glib-Basic-Types.html#gint64

That would be worse in my opinion.

long long is standard C99, it's just C++ that has trouble with it for now.
The reason I brought it up was because it seemed silly to stretch
C and C++ standards for values that rarely go above 2.

- Chris




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Re: why long long?

by Henrik /KaarPoSoft-2 :: Rate this Message:

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Chris Frey wrote:

> On Sat, Oct 10, 2009 at 01:39:08PM +0200, Henrik /KaarPoSoft wrote:
>  
>> If we really want to stick to the frozen interface, we could use gint64
>> http://library.gnome.org/devel/glib/stable/glib-Basic-Types.html#gint64
>>    
>
> That would be worse in my opinion.
>
> long long is standard C99, it's just C++ that has trouble with it for now.
> The reason I brought it up was because it seemed silly to stretch
> C and C++ standards for values that rarely go above 2.
>
> - Chris
>  
I agree - it was just a "quick and dirty" if we really want to stick to
frozen API.
In my opinion the best solution would to break API and change long long
to long.

/Henrik


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[RFC] Break API: change long to long long?

by Daniel Gollub-3 :: Rate this Message:

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On Thursday 22 October 2009 10:49:54 am Henrik /KaarPoSoft wrote:
> In my opinion the best solution would to break API and change long long
> to long.
>

Are there any vetos?
Could someone prepare a patch?


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Re: [RFC] Break API: change long to long long?

by Chris Frey-2 :: Rate this Message:

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On Thu, Oct 22, 2009 at 10:47:25PM +0200, Daniel Gollub wrote:
> On Thursday 22 October 2009 10:49:54 am Henrik /KaarPoSoft wrote:
> > In my opinion the best solution would to break API and change long long
> > to long.
> >
>
> Are there any vetos?
> Could someone prepare a patch?

Since I brought this up, I can prepare a patch.  Busy weekend here though,
so please pardon any slight delay.

Thanks,
- Chris




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