Interpreting Pascal REAL variables

wgcs · Aug 5, 2003

I have the challenge of loading data out of a file that was created by a Borland Pascal (v7) program. The file was a typed file, and had Records written to it, some of the fields of which are of type "real".

I stumbled on thread935-574230 through Google, and thought someone here might be able to help.

Basically, I need to interpret the binary Real value and recalculate it into a number I can use.

So far I've determined a Real is 6 bytes long (48bits). I found this page:

http://docs.sun.com/db/doc/801-5055/6hvhckkeh?a=view

Which helps a little, but only addresses 32bit and 64bit reals... (plus, I have to admit, I haven't yet determined exactly what to do with the mantissa, exponent and remainder...)

gwar2k1 · Aug 6, 2003

I know this isn't what you're after, but you could try object oriented (my knowledge of this is very limited). I think you can use variables used by other people, without knowing the source, in a program or extension you have written. But then again, I guess the origonal needs to be OOP aswell.

Could you elaborate on what you *actually* have regarding the value of the real?

~*Gwar3k1*~
"To the pressure, everything's just like: an illusion. I'll be losing you before long..."

Bertv100 · Aug 6, 2003

A full explanation on Borland's real type, together with conversion functions to IEEE floating point format, can be found at

http://www.wotsit.org,

more precisely here:

http://www.wotsit.org/download.asp?f=bpreal

Regards,
Bert Vingerhoets
vingerhoetsbert@hotmail.com

http://student.vub.ac.be/~bvingerh/

Don't worry what people think about you. They're too busy wondering what you think about them.

gwar2k1 · Aug 6, 2003

You know everything! *in awe*

~*Gwar3k1*~
"To the pressure, everything's just like: an illusion. I'll be losing you before long..."

Bertv100 · Aug 6, 2003

It seems that you can't use the link I copied, but try this one

http://www.wotsit.org/search.asp?s=binary

and use the "Borland Pascal Real" link

Regards,
Bert Vingerhoets
vingerhoetsbert@hotmail.com

http://student.vub.ac.be/~bvingerh/

Don't worry what people think about you. They're too busy wondering what you think about them.

wgcs · Aug 6, 2003

Thanks for finding the info... I've successfully accomplished the binary conversion: thread184-622842

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Interpreting Pascal REAL variables

wgcs

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gwar2k1

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Bertv100

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gwar2k1

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Bertv100

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wgcs

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