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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Gnat Sockets & Streams
Date: Sun, 16 Sep 2012 00:14:33 +0100
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Date: 2012-09-16T00:14:33+01:00
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Simon Wright <simon@pushface.org> writes:

> Robert Love <rblove@airmail.net> writes:
>
>> The string comes over 1 character at at time.  I've looked over the
>> code to see that I used the package exactly like the example.  I've
>> had coworkers look it over.  We don't see any way the
>>
>>  String'Output(Channel, "Dummy Data");
>>
>> can output the data one character at a time.
[...]
> That is, I believe, the behaviour specified by the ARM[1], paras 25..27
> and 9.
>
> This happened to me a long time ago, I thought AdaCore had implemented
> an optimisation for strings.

As far as I can tell, they have (GCC 4.6/4.7, GNAT GPL 2011/2012).

I was outputting to an instrumented memory stream, but I don't see how
that would make a difference.

I wrote

   String'Output (Str'Access, "hello");

and received 4 bytes (lower bound), 4 bytes (upper bound), 5 bytes
("hello").