Delphi: bytes/bits

Hello, from my knowledge the lowest variable type in delphi is a byte (8 bits), but I am filling out a record to be used with the winsock api and two of the fields it requires has to be 4 bits long.

I am wondering how i could achieve this in delphi, in C it is quite easily done like this:

unsigned char firstfield:4, secondfield:4;

Basically, need a way to work with nibbles (4 bits) in delphi.

Antrix
AntrixAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

grg99Commented:
The easiest way is to use shifts and masks to extract or combine the fields.

Example:  pack a and b into 4-bit fields into byte c:


c := ( a shl 4 ) or b;

( This assumes a and b are already 4 bits or less,
if not, and them with $000F:


c := ( (a and $000F) shl 4 ) or (b and $000F);

---------------------

Example, extract 4-bit fields a and b from c:

a := (c shr 4) and $000F;
b := (c      ) and $000F;

---------
That should handle most of your 4-bit needs.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
AntrixAuthor Commented:
Thank you for your quick and accurate reply
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.