mirror of
https://github.com/vale981/arb
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59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2016 Pascal Molin
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******************************************************************************/
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#include "acb_dirichlet.h"
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/* sieve on primes */
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void
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acb_dirichlet_chi_vec_sieve(ulong *v, const acb_dirichlet_group_t G, const acb_dirichlet_char_t chi, slong nv)
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{
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slong k, p, pmax;
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n_primes_t iter;
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n_primes_init(iter);
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pmax = (nv < G->q) ? nv : G->q;
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v[1] = 0;
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while ((p = n_primes_next(iter)) < pmax)
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{
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if (G->q % p == 0)
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{
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for (k = p; k < nv; k += p)
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v[k] = ACB_DIRICHLET_CHI_NULL;
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}
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else
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{
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long chip;
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chip = acb_dirichlet_chi(G, chi, p);
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for (k = p; k < nv; k += p)
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if (v[k] != -1)
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v[k] = (v[k] + chip) % chi->order;
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}
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}
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n_primes_clear(iter);
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}
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