88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
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/*=============================================================================
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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) 2011, 2012 Sebastian Pancratz
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******************************************************************************/
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#include "padic.h"
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ulong padic_val_fac_ui_2(ulong N)
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{
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ulong s = 0, t = N;
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do
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{
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t /= 2;
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s += t;
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}
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while (t);
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return s;
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}
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ulong padic_val_fac_ui(ulong N, const fmpz_t prime)
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{
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if (fmpz_abs_fits_ui(prime))
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{
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const ulong p = fmpz_get_ui(prime);
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ulong s = 0, t = N;
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do
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{
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t /= p;
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s += t;
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}
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while (t);
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return s;
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}
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else
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{
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return 0;
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}
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}
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void padic_val_fac(fmpz_t rop, const fmpz_t op, const fmpz_t p)
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{
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fmpz_t s, t;
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if (fmpz_sgn(op) < 0)
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{
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flint_printf("Exception (padic_val_fac). op is negative.\n");
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abort();
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}
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fmpz_init(s);
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fmpz_init_set(t, op);
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do
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{
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fmpz_fdiv_q(t, t, p);
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fmpz_add(s, s, t);
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}
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while (!fmpz_is_zero(t));
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fmpz_swap(rop, s);
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}
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