Re: Streams in Ada

[James Rogers <jimmaureenrogers@worldnet.att.net>]

I assume from your use of the term "streams" that you want to be able
to directly address file elements. "Streams" is the C term for such
capability. Ada uses streams for a somewhat different capability.

I believe what you want is handled by the package Ada.Direct_Io.

Look in the Ada Reference Manual, Appendix A, for details on this
package.

Jim Rogers
Colorado Springs, Colorado USA

"chris.danx" wrote:
> 
> Hi,
>     I've looked about for examples on streams in Ada.  I'm writing an
> virtual file system as a file on disk, and want to use streams.  I have to
> be able to go back and forwards and read large blocks of data from the file
> at random positions.  I have tried to locate an example of using streams but
> couldn't find any that didn't deal with sequential access.
> 
> the first block is 512 bytes and inodes are 64bytes.  then i have a set of
> blocks which are 16bytes long.  you can see now why i'm using streams, but i
> can't seem to work out from the ref manual and Barnes what i should do.  I
> recall the ref manual saying index is relative to stream element but i don't
> know what it means.  Anyone know of a good example?
> 
> Thanks in advance,
> Chris Campbell