pqc/external/flint-2.4.3/nmod_poly/realloc.c
2014-05-24 23:16:06 +02:00

57 lines
1.7 KiB
C

/*=============================================================================
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);
}
}