Re: [boost] Infinite precision integer draft

From: Maarten Kronenburg (M.Kronenburg_at_[hidden])
Date: 2006-05-26 08:08:31

As a response for a request for sub
integers, in the document I will delete the
is_even and is_odd member functions,
and add:
const integer highest_bit() const;
const integer lowest_bit() const;
const integer get_sub( const integer &, const integer & ) const;
By the way here no size_type is used, because
size_type suffices for the range of bytes,
but not for the range of bits, which is a factor
8 larger.
Regards, Maarten.

"Maarten Kronenburg" <M.Kronenburg_at_[hidden]> wrote in message
news:e55e0m$jnh$1_at_sea.gmane.org...
> Jarrad,
> About the sub integers I was a little
> too easy, because my solution is not as
> fast as extracting sub integers.
> What you ask for is what substr is for strings.
> Now I think this should be added for
> performance reasons.
> Regards, Maarten.
>
> "Jarrad Waterloo" <jwaterloo_at_[hidden]> wrote in message
> news:20060524184833.5667B14A8001_at_dqmail.dynamicquest.com...
> > Here are my comments concerning Maarten's infinite precision integer
> draft.
> > I would not wait to submit this library to boost before these following
> > features because people are in need of it now.
> >
> > 1) The ability to extract sub integers out of an integer such as the
> integer
> > at bit offset 3 and length of 4. This is especially helpful in the area
of
> > RFID where large unsigned integers are partitioned into smaller
integers.
> > 2) The ability to convert integer to bases other than base 10; any
really
> > from base 2-36
> > 3) An implementation of a fixed sized stack version of the
> > integer_allocator. This may be useful for performance when someone is
not
> > working with an infinite precision integer but a very large one such as
> 512
> > or 1024 bits.
> > 4) An unsigned version of the integer class that benefits from the
higher
> > performance of unsigned operations
> >
> >
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