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/*
Copyright (C) 2010 William Hart
Copyright (C) 2010 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.h"
#include "fmpq_poly.h"
void fmpq_poly_realloc(fmpq_poly_t poly, slong alloc)
{
if (alloc == 0) /* Clear up, reinitialise */
{
fmpq_poly_clear(poly);
fmpq_poly_init(poly);
return;
}
if (poly->alloc) /* Realloc */
{
if (poly->length > alloc) /* Reduce the size */
{
slong i;
for (i = alloc; i < poly->length; i++)
_fmpz_demote(poly->coeffs + i);
poly->length = alloc;
_fmpq_poly_normalise(poly);
}
poly->coeffs = (fmpz *) flint_realloc(poly->coeffs, alloc * sizeof(fmpz));
if (poly->alloc < alloc)
{
flint_mpn_zero((nn_ptr) (poly->coeffs + poly->alloc), alloc - poly->alloc);
}
}
else /* Nothing allocated, do it now */
{
poly->coeffs = (fmpz *) flint_calloc(alloc, sizeof(fmpz));
}
poly->alloc = alloc;
}