[gameprogrammer] Re: problem filling a buffer

ons, 21 03 2007 kl. 16:23 -0500, skrev Roger D Vargas:
> 
> Rasmus Toftdahl Olesen escribió:
> 
> > 
> > One thing that could ease filling a buffer i to just use a structure to
> > hold your data, and then pass a pointer to that as the buffer, e.g.:
> > 
> > static const int COMMAND_LOGIN = 20;
> > static const int MAX_STRING = 10;
> > typedef struct {
> >     int command;
> >     char username[MAX_STRING];
> >     char password[MAX_STRING];
> > } Login;
> Thanks for illustrating the use of SDLNet_Write. I will switch all my 
> code to use it. But in this case, the compiler does not includes padding 
> or something to align struct members?
The compilers i have come across all align members on byte boundaries,
and not character boundaries. I've recently seen code like this working
fine when communicating from an ARM processor (big-endian, ARM compiler)
to an Intel processor (MSVC compiler) over a USB connection.

I am sure there are some compilers that will align the members on 32-bit
boundaries, in which case you will experience strange errors. But
commonly it works fine.

-- 
Rasmus Toftdahl Olesen <halfdan@xxxxxxxxxxxx>
halfdans.net


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