At 4:21 PM +1000 4/9/01, James Nicholls wrote:
>Hi all, I've got a structure defined in CodeWarrior C++ as:
>
>struct T
>{
> UInt32 f1 : 24;
> UInt8 f2;
>};
>
>This structure is meant to treat the first three bytes of memory as a unit
>and the following byte as another unit inside of a 4 byte word. sizeof(T)
>== 6. WHY DOESN'T EQUAL 4!!??
Because integer fields of structures prefer to align themselves on natural 16-bit or
32-bit word boundaries. If you don't want this behavior, and instead want each field
to use only the number of bits you've defined, use #pragma options align=packed
before the structure definition and #pragma options align=reset afterwards.
Regards,
Jim Schram
Palm Incorporated
Partner Engineering
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