Re: How to byte swap an IEEE Float?

"Björn" <ssh9614@xxxxxxxxxxx> writes:

> I need to read some float values from file that have been written in
> big-endian byte order from a c-program.

See SAL.Network_Order.Gen_Scalar_64 at
http://www.toadmail.com/~ada_wizard/ada/sal.html for a convenient way
to do this.

> The simple swapping procedure that I have just interchanges the byte
> order of type IEEE_Float_32 to get little-endian.

Ok.

> The problem is that for some values (eg. 33.229000) it is a "NaN"
> when doing IEEE_Float_32'Read and I get a constraint error (invalid
> data) from stream_io when the value is read. How do I get around
> this?

Hmm. Are you saying the original value is _not_ a NaN? If so, then
your swap implementation is faulty; try mine.

--
-- Stephe

.

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