Re: Sizes and types for network programming

"Bo Persson" <>
Wed, 15 Sep 2010 20:29:00 +0200
Goran Pusic wrote:

On Sep 15, 3:23 am, Michael Hull <> wrote:

I would have expected that some header file would define int8,
int16, int32, int64 for these kind of scenarios, and I'm sure that
I have seen these kind of definitions, but can seem to find them
on my local system, nor google.

There is always a way to define your data types with correct sizes
in your toolchain (compiler is most affected). AFAIK, exact sizes
are not specified by C++ standard (it is by C, I think).

Well, C99 typedefs int32_t for a 32 bit type *if there is one*. If int
happens to be 36 or 48 bits, the typedef would be missing.

C++0x will do the same.

You use a
"tailor" header for that. Said header is shipped for any toolchain
you will support.

You define your serialized/streamed/marshaled format in a toolchain-
agnostic manner. Specifically for numbers, you need to know the
endiannes, too. That influences they way you (de)serialize them on
the sending/receiving sides.

Right, you define the transport format for the network, and implement
that on each platform. VERY hard to do that portably.

Bo Persson

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