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/*
Copyright (C) 2008, 2009 William Hart
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz.h"
#include "fmpz_poly.h"
void
fmpz_poly_set_coeff_fmpz(fmpz_poly_t poly, slong n, const fmpz_t x)
{
if (fmpz_is_zero(x))
{
if (n >= poly->length)
return;
fmpz_zero(poly->coeffs + n);
if (n == poly->length - 1) /* only necessary when setting leading coefficient */
_fmpz_poly_normalise(poly);
}
else
{
fmpz_poly_fit_length(poly, n + 1);
if (n + 1 > poly->length)
{
slong i;
for (i = poly->length; i < n; i++)
fmpz_zero(poly->coeffs + i);
poly->length = n + 1;
}
fmpz_set(poly->coeffs + n, x);
}
}
void
fmpz_poly_set_coeff_si(fmpz_poly_t poly, slong n, slong x)
{
if (x == 0)
{
if (n >= poly->length)
return;
fmpz_zero(poly->coeffs + n);
if (n == poly->length - 1) /* only necessary when setting leading coefficient */
_fmpz_poly_normalise(poly);
}
else
{
fmpz_poly_fit_length(poly, n + 1);
if (n + 1 > poly->length)
{
slong i;
for (i = poly->length; i < n; i++)
fmpz_zero(poly->coeffs + i);
poly->length = n + 1;
}
fmpz_set_si(poly->coeffs + n, x);
}
}
void
fmpz_poly_set_coeff_ui(fmpz_poly_t poly, slong n, ulong x)
{
if (x == 0)
{
if (n >= poly->length)
return;
fmpz_zero(poly->coeffs + n);
if (n == poly->length - 1) /* only necessary when setting leading coefficient */
_fmpz_poly_normalise(poly);
}
else
{
fmpz_poly_fit_length(poly, n + 1);
if (n + 1 > poly->length)
{
slong i;
for (i = poly->length; i < n; i++)
fmpz_zero(poly->coeffs + i);
poly->length = n + 1;
}
fmpz_set_ui(poly->coeffs + n, x);
}
}