A bit of binary I/O

[Heinz]

Heinz Wrote:

> Frank Benoit (keinfarbton) Wrote:
> 
> > > // Primitive
> > > 09 00 00 00 00 00 00 00 0B 00 00 00 A0 C7 41 00
> > 
> > 09 00 00 00 00 00 00 00 // the ulong with value 9
> > 0B 00 00 00             // arraysize 11
> > A0 C7 41 00             // pointervalue to the start of data
> > 
> > > // Structure
> > > 09 00 00 00 00 00 00 00 0B 00 00 00 A0 C7 41 00
> > 
> > same here
> > 
> > > // Class
> > > C0 3F 91 00
> > 
> > the first 4 bytes of your class. mtt.sizeof is the size of the reference
> > not the size of the object itself.
> > 
> > s.ptr is the pointer to the array data.
> > &s is the address of the struct, that holds the array length and the
> > pointer to the data.
> > To write the string, you might want to try this:
> > 	myFile.writeExact( s.ptr, s.length );
> > 
> 
> I get it, but if i'm actually writing the address of my data and not the data itself then why i'm able to retrieve the data even if it's not there? 

I think i'm getting it, the data retrieved are addresses to the start of data but in my RAM, so if i take this file to another computer the data received should be different, am i right?

To solve this and write the real data you suggest using the .ptr, is this property available in every object.

I'm sorry to bother you so much Frank: I'm interested in your oppinion about the other 2 questions.

Really thanks man, you rule.