C++ (Cpp) fmpz_poly_set_fmpz示例

示例#1

文件： compose_series.c 项目： goens/flint2

void
fmpz_poly_compose_series(fmpz_poly_t res, 
                    const fmpz_poly_t poly1, const fmpz_poly_t poly2, long n)
{
    long len1 = poly1->length;
    long len2 = poly2->length;
    long lenr;

    if (len2 != 0 && !fmpz_is_zero(poly2->coeffs))
    {
        printf("exception: fmpz_poly_compose_series: inner polynomial "
                "must have zero constant term\n");
        abort();
    }

    if (len1 == 0 || n == 0)
    {
        fmpz_poly_zero(res);
        return;
    }

    if (len2 == 0 || len1 == 1)
    {
        fmpz_poly_set_fmpz(res, poly1->coeffs);
        return;
    }

    lenr = FLINT_MIN((len1 - 1) * (len2 - 1) + 1, n);
    len1 = FLINT_MIN(len1, lenr);
    len2 = FLINT_MIN(len2, lenr);

    if ((res != poly1) && (res != poly2))
    {
        fmpz_poly_fit_length(res, lenr);
        _fmpz_poly_compose_series(res->coeffs, poly1->coeffs, len1, 
                                               poly2->coeffs, len2, lenr);
        _fmpz_poly_set_length(res, lenr);
        _fmpz_poly_normalise(res);
    }
    else
    {
        fmpz_poly_t t;
        fmpz_poly_init2(t, lenr);
        _fmpz_poly_compose_series(t->coeffs, poly1->coeffs, len1,
                                             poly2->coeffs, len2, lenr);
        _fmpz_poly_set_length(t, lenr);
        _fmpz_poly_normalise(t);
        fmpz_poly_swap(res, t);
        fmpz_poly_clear(t);
    }
}

示例#2

文件： compose_divconquer.c 项目： hemmecke/flint2

void
fmpz_poly_compose_divconquer(fmpz_poly_t res, 
                             const fmpz_poly_t poly1, const fmpz_poly_t poly2)
{
    const long len1 = poly1->length;
    const long len2 = poly2->length;
    long lenr;
    
    if (len1 == 0)
    {
        fmpz_poly_zero(res);
        return;
    }
    if (len1 == 1 || len2 == 0)
    {
        fmpz_poly_set_fmpz(res, poly1->coeffs);
        return;
    }
    
    lenr = (len1 - 1) * (len2 - 1) + 1;
    
    if (res != poly1 && res != poly2)
    {
        fmpz_poly_fit_length(res, lenr);
        _fmpz_poly_compose_divconquer(res->coeffs, poly1->coeffs, len1, 
                                                   poly2->coeffs, len2);
        _fmpz_poly_set_length(res, lenr);
        _fmpz_poly_normalise(res);
    }
    else
    {
        fmpz_poly_t t;
        fmpz_poly_init2(t, lenr);
        _fmpz_poly_compose_divconquer(t->coeffs, poly1->coeffs, len1,
                                                 poly2->coeffs, len2);
        _fmpz_poly_set_length(t, lenr);
        _fmpz_poly_normalise(t);
        fmpz_poly_swap(res, t);
        fmpz_poly_clear(t);
    }
}