Re: [ROOT] About the size of struct in ROOT

From: Pascal Mantran (pmantran@clamart.oilfield.slb.com)
Date: Tue Apr 01 2003 - 13:16:07 MEST 





  


The size difference may come from the machine architecture:
On RISC based chips, such as a Sun Sparc, all elements are aligned on an
address multiple of the element size, e.g. a double is aligned on address
multiple of 8. If your struct contain a char followed by a double, you may
have gaps in the struct to fulfill the alignment condition.





Huang Xingtao wrote:


  
  
 
  
 
    
  
I use the Root (3.01/06) package. I meet the following
 problem. The size of the struct gived by ROOT is greater than the sum  of size
of all the type in the struct. I don't know how to calculat it in  the ROOT. 
  





















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