Thank you for your reply. For #2: I meant, the serialization is in order of the struct as defined.
---------- Original Message ----------- From: Benoît Minisini <gam...@users.sourceforge.net> To: nand...@nothingsimple.com, mailing list for gambas users <gambas-user@lists.sourceforge.net> Sent: Mon, 17 Jan 2011 03:18:07 +0100 Subject: Re: [Gambas-user] some questions of: Struct > > Benoit, > > 1) What version is struct implemented? > > I think you want to know that structures are implemented in Gambas 3 only. > > > 2) Reading and writing a struct to a stream (file, etc) is an exact copy of > > the struct? > > Of course not. Data is serialized. > > Writing (or reading) a structure is exactly like writing (or reading) each > field with the WRITE (or READ) instruction. This is done recursively if there > are structures inside structures. > > Consequently, as soon as you don't use strings, the data written to the > stream > will look like what is stored in memory, but without padding (see the next > question). > > > 3) Does struct pad with bytes to fit alignments or is it exact > > as defined? > > There is padding, so that an short is stored at a memory address multiple of > 2, an integer or a single at a memory address multiple of 4, a long, a float > or a date at a memory address multiple of 8. A more complex datatype (a > pointer, an object reference, an embedded structure or array) is stored at an > address multiple of 4 on a 32 bits system, and at an address multiple of 8 on > a 64 bits system. Finally, an entire object is padded so that its size is a > multiple of 4 on a 32 bits system, and a multiple of 8 on a 64 bits system. > > > 4) This is similar to RECORD in VB. > > I don't know. > > Regards, > > -- > Benoît Minisini > > ------------------------------------------------------------------------------ > Protect Your Site and Customers from Malware Attacks > Learn about various malware tactics and how to avoid them. Understand > malware threats, the impact they can have on your business, and how you > can protect your company and customers by using code signing. > http://p.sf.net/sfu/oracle-sfdevnl > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user ------- End of Original Message ------- ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
