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From: "frikk" <frikker@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Reading Float Data from a binary file into ada
Date: 30 Jan 2007 11:56:55 -0800
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Date: 2007-01-30T11:56:55-08:00
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On Jan 30, 1:04 pm, "frikk" <frik...@gmail.com> wrote:
> On Jan 30, 12:56 pm, "Jeffrey R. Carter" <jrcar...@acm.org> wrote:
>
> > frikk wrote:
>
> > > Basically I need to be able to read in the binary data byte by byte
> > > but store it into a 32 bit Float.  The C union example above uses the
> > > same memory address for the Float as it does for the size 4 char
> > > array. I don't even know if the VB dump will correspond with the way
> > > ada handles floats or not, but I'll worry about that later.
>
> > Any reason you can't call this C function from Ada?
>
> > --
> > Jeff Carter
> > "I soiled my armor, I was so scared."
> > Monty Python & the Holy Grail
> > 71
>
> Thank you for the responses so far.
>
> We are using simulink and calling ada through s-functions.  If we use
> C, we'd have to get the data back to the matlab workspace, then pass
> it into an ada module.  It is prefered to keep all of the data inside
> the ada modules without coming back to the workspace.
>
> I've been working with ada for awhile, but I'm still not very good at
> the syntaxes of more complicated data management commands.  How does
> ada store its floating point data? Is it stored like an ieee standard?
>
> And yes - it appears that the data dumped is not actually a float but
> fixed point. This is how VB apparently handles 'Float' data types.
>
> If I had data in a binary file, even disregarding the fractional
> piece, how could I get this into an ada variable? If I could even get
> a round about syntax to help me get started in setting up the memory
> locations and such that would be helpful. Its hard to find specific
> examples sometimes.
>
> Thanks!
> Blaine

Actually - now that I look at it Visual Basic is using a 'Single' 
type, not 'Float'.  This may make more sense now.