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Newsgroups: comp.lang.ada
Subject: Re: Dynamically reallocated buffer
References: <1180679626.254857.59070@w5g2000hsg.googlegroups.com>
 <1180709349.464436.287820@g4g2000hsf.googlegroups.com>
  <uabviwmz9.fsf@stephe-leake.org>
  <46628ed5$0$23149$9b4e6d93@newsspool1.arcor-online.net>
From: Stephen Leake <stephen_leake@stephe-leake.org>
Date: Mon, 04 Jun 2007 20:25:59 -0400
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Date: 2007-06-04T20:25:59-04:00
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Georg Bauhaus <bauhaus@futureapps.de> writes:

> Stephen Leake wrote:
>> Matthew Heaney <mheaney@on2.com> writes:
>>
>>> On Jun 1, 2:33 am, Maciej Sobczak <see.my.homep...@gmail.com> wrote:
>>>> The problem is that Ada.Containers.Vectors does not provide the
>>>> necessary guarantees to be any useful in this context.
>>> Right, that container does not guarantee that the underlying structure
>>> is a contiguous array (as is the case in C++).  Think of it not as an
>>> unbounded array (which would a physical view), but rather as a
>>> container that provides random access (which is the logical view).
>> SAL.Poly.Unbounded_Arrays. http://stephe-leake.org/ada/sal.html
>
> How would I pass the array storage of an Array_Type object
> to a byte copying function? (As in write_to_device(&buffer[0],
> buffer.size());)

That operation is not provided. You need to derive from Array_Type and
provide an access function that returns the address of the current
actual storage.

-- 
-- Stephe