Re: BigInt: C++ class for computation with arbitrary large integers

From: Alex Vinokur (alexvn_at_big-foot.com)
Date: 02/24/05 

Date: Thu, 24 Feb 2005 22:33:35 +0200

Hi John,

"John" <weekender_ny@yahoo.com> wrote in message news:1109268791.875900.83560@z14g2000cwz.googlegroups.com...
> Hi Alex,
>
> How are the bigints stored internally? It seems like you store the
> integers in strings?

No, 'std::vector<unsigned long> units_' is used to store bigints internally (see file bigint.h. line-101).
std::string is used to initialize bigints.

> If I have to shift and mask, is this the right choice for most
> architectures?

Could you detail your question?

> Or should you really store it in a list of integers?
>
> If I just want a string which is twice the size of double, which large
> int library
> do you recommend?

I think, it depends on various circumstances.
The developer should perform some tests with different libraries and then to choose appropriate one.

> How does ur bigint class compare with mpz_t of gmp?

The comparison hasn't been performed.

>
> Thanks,
> --j
> 

-- 
 Alex Vinokur
     email: alex DOT vinokur AT gmail DOT com
     http://mathforum.org/library/view/10978.html
     http://sourceforge.net/users/alexvn

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