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digitalmars.D.learn - struct members align

↑ ↓ ← → alxdef <alxdef yandex.ru> writes:
I have some problem with struct alignment. My struct is:
struct some_struct
{
    ubyte member1;
    ubyte member2;
    ubyte member3;
    ushort member5;
    ushort member6;
}
The appearance of members is fixed. member5 shifted by 1 byte down to member6.
How to fix this problem?
Apr 28 2008
↑ ↓ ← → Lutger <lutger.blijdestin gmail.com> writes:
alxdef wrote:


 I have some problem with struct alignment. My struct is:
 struct some_struct
 {
     ubyte member1;
     ubyte member2;
     ubyte member3;
     ushort member5;
     ushort member6;
 }
 The appearance of members is fixed. member5 shifted by 1 byte down to
 member6. How to fix this problem?



align(1) struct some_struct { ... } will do the trick, I think.
Apr 28 2008
↑ ↓ ← → alxdef <alxdef yandex.ru> writes:
Lutger Wrote:


 align(1) struct some_struct { ... } will do the trick, I think.



As Russians say: The fakir was drunk, trick is not has gone right. :-(
Apr 28 2008
↑ ↓ ← → Lutger <lutger.blijdestin gmail.com> writes:
alxdef wrote:


 Lutger Wrote:
 

 align(1) struct some_struct { ... } will do the trick, I think.



 As Russians say: The fakir was drunk, trick is not has gone right. :-(



Which compiler? Or have I misunderstood the question mayhaps, this program
works under dmd 1.027:

struct some_struct
{
    ubyte member1;
    ubyte member2;
    ubyte member3;
    ushort member4;
    ushort member5;
}

align(1) struct some_struct2
{
    ubyte member1;
    ubyte member2;
    ubyte member3;
    ushort member4;
    ushort member5;
}

void main()
{
    assert(some_struct.sizeof == 8);
    assert(some_struct2.sizeof == 7);
}
Apr 28 2008