66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2010 William Hart
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Copyright (C) 2010 Sebastian Pancratz
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******************************************************************************/
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#include <gmp.h>
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#include <stdlib.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "fmpq_poly.h"
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void fmpq_poly_realloc(fmpq_poly_t poly, slong alloc)
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{
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if (alloc == 0) /* Clear up, reinitialise */
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{
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fmpq_poly_clear(poly);
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fmpq_poly_init(poly);
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return;
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}
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if (poly->alloc) /* Realloc */
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{
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if (poly->length > alloc) /* Reduce the size */
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{
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slong i;
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for (i = alloc; i < poly->length; i++)
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_fmpz_demote(poly->coeffs + i);
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poly->length = alloc;
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_fmpq_poly_normalise(poly);
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}
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poly->coeffs = (fmpz *) flint_realloc(poly->coeffs, alloc * sizeof(fmpz));
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if (poly->alloc < alloc)
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{
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flint_mpn_zero((mp_ptr) (poly->coeffs + poly->alloc), alloc - poly->alloc);
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}
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}
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else /* Nothing allocated, do it now */
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{
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poly->coeffs = (fmpz *) flint_calloc(alloc, sizeof(fmpz));
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}
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poly->alloc = alloc;
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}
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