• "ZaitcevE.V." <Genior km.ru> Oct 23 2001
• Roland <rv ronetech.com> Oct 23 2001
• Heinz Saathoff <hsaat bre.ipnet.de> Oct 23 2001

"ZaitcevE.V." <Genior km.ru> writes:

Mr Walter. How it is possible to bypass a problem of alignment?

struct xxx
             {
              short a;
              char *pa;
              };

sizeof (struct xxx) gives 8, instead of expected 6. It is important for
compatibility.

Roland <rv ronetech.com> writes:

Me i use this (I'm not sure it is up to date but it works):

//set alignment one byte
#ifdef __SC__
    #pragma SC align 1
#else
    #pragma option -a-
#endif

struct MyStruc {
.
.
};

//restore previous alignment
#ifdef __SC__
    #pragma SC align
#else
    #pragma option -a.
#endif

Ciao

Roland

"ZaitcevE.V." a écrit :

 Mr Walter. How it is possible to bypass a problem of alignment?

 struct xxx
              {
               short a;
               char *pa;
               };

 sizeof (struct xxx) gives 8, instead of expected 6. It is important for
 compatibility.

Heinz Saathoff <hsaat bre.ipnet.de> writes:

ZaitcevE.V. schrieb...
 How it is possible to bypass a problem of alignment?
 
 struct xxx
              {
               short a;
               char *pa;
               };
 
 sizeof (struct xxx) gives 8, instead of expected 6. It is important for
 compatibility.


You can specify alignment with the pragma pack. In your case you can use 
it this way:

  #pragma pack(push, 2)
  //alignment is now 2
  struct xxx {
     short a;
     char *pa;
  };
  #pragma pack(pop)
  // alignment restored to the old state


push/pop is not necessary but I find them very usefull as you don't have 
to reset the alignment to a fixed value.


Regards,
	Heinz