/*=============================================================================

    This file is part of FLINT.

    FLINT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    FLINT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with FLINT; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

=============================================================================*/
/******************************************************************************

    Copyright (C) 2007, David Howden.
    Copyright (C) 2010 William Hart

******************************************************************************/

#include <gmp.h>
#include <stdlib.h>
#include "flint.h"
#include "ulong_extras.h"
#include "nmod_poly.h"

void
nmod_poly_realloc(nmod_poly_t poly, slong alloc)
{
    if (alloc == 0)
    {
        nmod_poly_clear(poly);
        poly->length = 0;
        poly->alloc = 0;
        poly->coeffs = NULL;

        return;
    }

    poly->coeffs = (mp_ptr) flint_realloc(poly->coeffs, alloc * sizeof(mp_limb_t));

    poly->alloc = alloc;

    /* truncate poly if necessary */
    if (poly->length > alloc)
    {
        poly->length = alloc;
        _nmod_poly_normalise(poly);
    }
}