Compression - Re: how to efficiently storing floating point numbers with limited

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Re: how to efficiently storing floating point numbers with limited

Hans-Peter Diettrich

2008-04-01, 7:56 am

moogie wrote:

> I want to store a set of floating points which have a maximum of 8
> digits, sign and decimal point.
>
> i.e
> values between -99999999.0 and 99999999.0

Some compilers have an data type Currency, which is a scaled integer
(fixed point, e.g. 64 bits, divided by 10000). Such types are designed
for somewhat lossless representation of floating point values, and fast
calculations, not for compression.

You seem to mean kind of BCD representation, based on decimal digits,
what's not a widely supported data type. A conversion between the usual
binary floating point values (base 2) and BCD (base 10) can result in
unwanted loss of precision.

DoDi

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