Re: Float to String

["Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>]

On 09 Nov 2004 19:17:42 +0100, Pascal Obry wrote:

> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
> 
>> There is no any portable way to do so. 
> 
> Well if we could read/write a float in base 2 it would work I think.

TοΏ½Machine_Radix is not necessarily 2. So abstractedly, 2 is not any better
than 10, 60 or whatsoever. Though in most cases it would do the trick.

> So it seems there is a way, but it seems quite a bit of work...

If you mean a machine-specific representation like

X -> <T'Machine_Radix>#<T'Fraction (X)>#E<T'Exponent (X)>

then I think it shouldn't be very difficult. If there are integers of
mantissa length, then one could directly convert T'Compose (T'Fraction (X),
T'Machine_Mantissa) to that integer. If they are shorter, then one could
use S'Compose and S'Truncate to extract mantissa digits. These operations
should be exact.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de