C++ (Cpp) _nmod_poly_div_newton示例

示例#1

文件： divrem_newton.c 项目： goens/flint2

void _nmod_poly_divrem_newton(mp_ptr Q, mp_ptr R, mp_srcptr A, long lenA, 
                              mp_srcptr B, long lenB, nmod_t mod)
{
    const long lenQ = lenA - lenB + 1;
    
    _nmod_poly_div_newton(Q, A, lenA, B, lenB, mod);

    if (lenB > 1)
    {
        if (lenQ >= lenB - 1)
            _nmod_poly_mullow(R, Q, lenQ, B, lenB - 1, lenB - 1, mod);
        else
            _nmod_poly_mullow(R, B, lenB - 1, Q, lenQ, lenB - 1, mod);

        _nmod_vec_sub(R, A, R, lenB - 1, mod);
    }
}

示例#2

文件： div_newton.c 项目： clear731/lattice

void nmod_poly_div_newton(nmod_poly_t Q, const nmod_poly_t A,
                                         const nmod_poly_t B)
{
    const slong lenA = A->length, lenB = B->length, lenQ = lenA - lenB + 1;

    mp_ptr q;

    if (lenB == 0)
    {
        flint_printf("Exception (nmod_poly_div_newton). Division by zero.\n");
        abort();
    }

    if (lenA < lenB)
    {
        nmod_poly_zero(Q);
        return;
    }

    if (Q == A || Q == B)
    {
        q = flint_malloc(lenQ * sizeof(mp_limb_t));
    }
    else
    {
        nmod_poly_fit_length(Q, lenQ);
        q = Q->coeffs;
    }

    _nmod_poly_div_newton(q, A->coeffs, lenA, B->coeffs, lenB, B->mod);

    if (Q == A || Q == B)
    {
        flint_free(Q->coeffs);
        Q->coeffs = q;
        Q->alloc  = lenQ;
    }
    Q->length = lenQ;
}