We help IT Professionals succeed at work.

C header conversion - union with struct with two unions ...

Jana618
Jana618 asked
on
745 Views
Last Modified: 2012-05-05
Hi, another quick C header conversion question...

union TheUnion
{
      unsigned int Pair;
      struct
      {
            union
            {
                  unsigned short TargetID;
                  struct
                  {
                        unsigned char PrimaryID;
                        unsigned char SubID;
                  }tc;
            };
            union
            {
                  unsigned short SourceID;
                  struct
                  {
                        unsigned char PrimaryID;
                        unsigned char SubID;
                  }sc;
            };
      };
};

I can't seem to get the levels of packed records correct.
Cheers,
Jana
Comment
Watch Question

Mike LittlewoodEngineer

Commented:
I'm not very good at reading C code, is this 2 records inside another record?
Can you explain what it is supposed to represent please, unless someone answers sooner
MerijnBSr. Software Engineer
CERTIFIED EXPERT

Commented:
either I'm misreading this, or this piece of C code is really strange.
I see 3 unions, but there are no actual unions?
Software Engineer, Advisory
CERTIFIED EXPERT
Top Expert 2005
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION

Author

Commented:
Thanks again for your answer Russell, sorry for the late response - I've been having some issues with a function call that uses this structure, but I'm pretty sure this has to be related to the third party dll rather than this header conversion. Regards, Jana

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.