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/*
Copyright (C) 2011 Sebastian Pancratz
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 "mpn_extras.h"
#include "fmpz_vec.h"
#include "fmpz_mod_poly.h"
void fmpz_mod_poly_realloc(fmpz_mod_poly_t poly, slong alloc,
const fmpz_mod_ctx_t ctx)
{
if (alloc == 0) /* Clear up, reinitialise */
{
if (poly->coeffs)
_fmpz_vec_clear(poly->coeffs, poly->alloc);
poly->coeffs = NULL;
poly->length = 0;
poly->alloc = 0;
return;
}
if (poly->alloc) /* Realloc */
{
fmpz_mod_poly_truncate(poly, alloc, ctx);
poly->coeffs = (fmpz *) flint_realloc(poly->coeffs, alloc * sizeof(fmpz));
if (alloc > poly->alloc)
flint_mpn_zero((nn_ptr) (poly->coeffs + poly->alloc),
alloc - poly->alloc);
}
else /* Nothing allocated already so do it now */
{
poly->coeffs = (fmpz *) flint_calloc(alloc, sizeof(fmpz));
}
poly->alloc = alloc;
}