mirror of
https://github.com/vale981/arb
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57 lines
1.7 KiB
C
57 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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#include "acb_poly.h"
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void
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acb_dirichlet_powers_init(acb_dirichlet_powers_t t, ulong order, slong num, slong prec)
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{
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ulong m;
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acb_t zeta;
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t->order = order;
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m = (num == 1) ? 1 : num * (prec / 64 + 1);
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if (m > order)
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m = order;
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t->m = m;
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acb_init(zeta);
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acb_dirichlet_nth_root(zeta, order, prec);
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t->z = _acb_vec_init(m);
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_acb_vec_set_powers(t->z, zeta, m, prec);
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if (order > m)
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{
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t->M = (order / m) + 1;
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t->Z = _acb_vec_init(t->M);
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acb_pow_ui(zeta, zeta, m, prec);
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_acb_vec_set_powers(t->Z, zeta, t->M, prec);
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}
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else
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{
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t->M = 0;
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t->Z = NULL;
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}
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}
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