I would expect so, however, I am not an expert with MPFR. Could I
recommend asking on the MPFR list. They are a friendly bunch and would
give a much more precise answer I believe.
Bill.
On 12 May 2011 21:24, Bob Smith <bsm...@sudleyplace.com> wrote:
> On 5/12/2011 2:13 PM, Bill Hart wrote:
>>
>> There might be a way. But it would be in the mpfr documentation.
>>
>> There should be no problems with either MPIR or MPFR on Windows.
>>
>> Bill.
>>
>> On 12 May 2011 19:00, Bob Smith<bsm...@sudleyplace.com> wrote:
>>>
>>> I need this function to extend mpz_fac_ui to non-integral arguments. I
>>> see
>>> it's in the MPFR library. If I calculate in that library, is there a
>>> direct
>>> way to convert the result to mpf format?
>>>
>>> Or should I solve this problem entirely differently?
>>>
>>> My code needs to run on both Windows and Linux platforms.
>
> I see that the MPFR docs describe how to use mpf code with mpfr, but I'm
> working in the opposite direction: how to use an mpfr result with mpf.
>
> Looking at the two structs: __mpf_struct and __mpfr_struct
>
> typedef struct
> {
> int _mp_prec; /* Max precision, in number of `mp_limb_t's.
> Set by mpf_init and modified by
> mpf_set_prec. The area pointed to by the
> _mp_d field contains `prec' + 1 limbs. */
> int _mp_size; /* abs(_mp_size) is the number of limbs the
> last field points to. If _mp_size is
> negative this is a negative number. */
> mp_exp_t _mp_exp; /* Exponent, in the base of `mp_limb_t'. */
> mp_limb_t *_mp_d; /* Pointer to the limbs. */
> } __mpf_struct;
>
> typedef struct {
> mpfr_prec_t _mpfr_prec;
> mpfr_sign_t _mpfr_sign;
> mpfr_exp_t _mpfr_exp;
> mp_limb_t *_mpfr_d;
> } __mpfr_struct;
>
> is the correspondence as simple as
>
> mpfr_t mpfrVal;
> mpf_t mpfVal;
>
> mpfVal->_mp_prec = mpfrVal->_mpfr_prec;
> mpfVal->_mp_size = mpfrVal->_mpfr_sign ? -mpfrVal->_mpfr_prec
> : mpfrVal->_mpfr_prec;
> mpfVal->_mp_exp = mpfrVal->_mp_exp;
> mpfVal->_mp_d = mpfrVal->_mp_d;
>
> assuming both numbers have the same # bits per limb?
>
> --
> _______________________________________________________________
> Bob Smith - bsm...@sudleyplace.com
> http://www.sudleyplace.com - http://www.nars2000.org
>
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