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Newsgroups: comp.lang.ada
Date: Sun, 4 Jul 2021 21:06:57 -0700 (PDT)
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Subject: Re: Hi! How I can make _indexed_ stream file Input/Output ? Thanks.
From: zac brown <zacbrown690@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:62331
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On Monday, July 5, 2021 at 2:06:36 PM UTC+10, zac brown wrote:
> On Saturday, July 3, 2021 at 6:57:31 AM UTC+10, Shark8 wrote:=20
> > On Sunday, June 27, 2021 at 1:33:28 PM UTC-6, daniel wrote:=20
> > > How I can make _indexed_ stream file Input/Output ?=20
> > >=20
> > > For 'indexed' i mean manually setting file position:=20
> > > =3D> 'from' in $type'input() and=20
> > > =3D> 'to' in $type'output()=20
> > >=20
> > > Actually I use Ada.Streams.Stream_IO.=20
> > >=20
> > > My main need is examples.=20
> > >=20
> > > Thanks!=20
> > > Best Whishes,=20
> > > Dani.=20
> > Streams are a bit different than files; you see, streams are an abstrac=
tion on input/output and therefore different than files. Consider, for exam=
ple, an output stream that controls a radio transmitter. There's no possibl=
e way to "unsend" the data: it's a write-only device.=20
> >=20
> > If you're using Ada's standard library, with the XXX_IO packages, I bel=
ieve what you want is Ada.Direct_IO.