Re: Reading sequential data from Ada.Text_Io.Standard_Input?

[michael@ifr.luftfahrt.uni-stuttgart.de (Michael Paus)]

davidf@worf.mks.com (David J. Fiander) wrote:
> So, I want to read from standard input, using Ada.Sequential_Io.
> 
[...]
> So, what, if anything, is the magic incantation to read raw data
> from standard input?

The key to this kind of problem is to use the new Ada 95 streams
facility. Have a look at "A.12 Stream Input-Output". You can get
a stream access value which is associated with Standard_Input with
a declaration like this:

  S  : Ada.Text_IO.Text_Streams.Stream_Access
       := Ada.Text_IO.Text_Streams.Stream(Ada.Text_IO.Standard_Input);

You will need to with 
Ada.Text_IO, Ada.Text_IO.Text_Streams and Ada.Streams.Stream_IO
in order to get that working.

Have fun

Michael

PS: If you are interested I can send you a little example with a writer
application which writes a data structure to a stream which is
associated with standard output and a reader application which recreates
this data structure from a stream which is connected to standard input.
On UNIX you might then execute these apps like

> writer | reader

which means that the data produced by writer is piped into reader.

-- 
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--Dipl.-Ing. Michael Paus   (Member: Team Ada)
--University of Stuttgart, Inst. of Flight Mechanics and Flight Control
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