mirror of
https://github.com/vale981/arb
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81 lines
2.2 KiB
C
81 lines
2.2 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) 2015 Fredrik Johansson
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******************************************************************************/
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#include "acb_hypgeom.h"
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static void
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_acb_hypgeom_li(acb_t res, const acb_t z, slong prec)
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{
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if (acb_is_zero(z))
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{
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acb_zero(res);
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}
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else
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{
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acb_log(res, z, prec);
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acb_hypgeom_ei(res, res, prec);
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}
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}
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void
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_acb_hypgeom_const_li2_eval(arb_t s, slong prec)
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{
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acb_t t;
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acb_init(t);
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acb_set_ui(t, 2);
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_acb_hypgeom_li(t, t, prec);
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arb_set(s, acb_realref(t));
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acb_clear(t);
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}
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ARB_DEF_CACHED_CONSTANT(_acb_hypgeom_const_li2, _acb_hypgeom_const_li2_eval)
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static void
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_acb_hypgeom_li_offset(acb_t res, const acb_t z, slong prec)
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{
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if (acb_is_int(z) && arf_cmp_2exp_si(arb_midref(acb_realref(z)), 1) == 0)
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{
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acb_zero(res);
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}
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else
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{
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arb_t t;
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arb_init(t);
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_acb_hypgeom_const_li2(t, prec);
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_acb_hypgeom_li(res, z, prec);
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arb_sub(acb_realref(res), acb_realref(res), t, prec);
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arb_clear(t);
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}
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}
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void
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acb_hypgeom_li(acb_t res, const acb_t z, int offset, slong prec)
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{
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if (offset)
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_acb_hypgeom_li_offset(res, z, prec);
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else
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_acb_hypgeom_li(res, z, prec);
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}
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