mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
47 lines
1.6 KiB
C
47 lines
1.6 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) 2012 Fredrik Johansson
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******************************************************************************/
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#include "arb_poly.h"
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void
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_arb_poly_normalise(fmpz * coeffs, fmpz_t exp, fmpz_t rad, long len, long bits)
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{
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if (len != 0)
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{
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long b, shift;
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b = _fmpz_vec_max_bits(coeffs, len);
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b = FLINT_ABS(b);
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shift = FLINT_MAX(b - bits, 0);
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if (shift > 0)
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{
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_fmpz_vec_scalar_tdiv_q_2exp(coeffs, coeffs, len, shift);
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fmpz_cdiv_q_2exp(rad, rad, shift); /* must round up */
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fmpz_add_ui(rad, rad, 1UL); /* error from rounding */
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fmpz_add_ui(exp, exp, shift);
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}
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}
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}
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