Re: GMP bignum results using double cells.

[Rob Browning]

Rob Browning <address@hidden> writes:

>> Do we need to define scm_t_big_mpz in numbers.h?  Couldn't it just be
>> an declared-but-undefined struct there?  Like
>
> Possibly.  In the first pass, I was just matching what the other types
> did, but this will probably work.  I'll try it.

Ahh, that's why -- in gc-card.c, we have to call mpz_clear
(SCM_I_BIG_MPZ (x)).  I'd put the direct call in there just for
efficiency, and I also used direct manipulations in a few other places
(dealing with the ipv6 addresses and random number generation I
think).

So would you prefer: SCM_CELL_ADDR_1, putting the scm_t_big_mpz in
numbers.h, or just adding functions to the scm_i_big interface for any
non-numbers.c usages of bignums, even libguile internal ones.  The
latter would of course have more overhead, but it might not be
enough to be significant.

-- 
Rob Browning
rlb @defaultvalue.org, @linuxdevel.com, and @debian.org
Previously @cs.utexas.edu
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