Re: Using GNAT.Sockets

[Adrien Plisson <aplisson-news@stochastique.net>]

markp wrote:

> No,
> 
> It is an Ada program that does not use streams. It uses simply
> address/byte count passed to the TCP. I'm guessing by your answer it
> must use streams also. I don't have control over the other side, so,
> does this mean I will not be able to use streams on my side?
> 
> Mark

the 'Input attribute, when used on an array type, first tries to read 
the bounds of the array (ARM95 13.13.2 §26). those bounds are 
definitely NOT part of the data received, since the sender did not use 
streams, and that may explain the corruption you encountered (you are 
lucky: on fr.comp.lang.ada, another poster got a Storage_Error).

the solution is:
- either use 'Read and 'Write instead of 'Input and 'Output
- or rewrite the sender so that it uses 'Input and 'Output.

you should read ARM95 13.13.2 to understand what data are placed on 
the stream when using stream attributes.

-- 
rien