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https://github.com/vale981/arb
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61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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Copyright (C) 2013 Fredrik Johansson
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "acb_poly.h"
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void
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_acb_poly_pow_ui(acb_ptr res, acb_srcptr f, slong flen, ulong exp, slong prec)
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{
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_acb_poly_pow_ui_trunc_binexp(res, f, flen, exp, exp * (flen - 1) + 1, prec);
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}
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void
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acb_poly_pow_ui(acb_poly_t res,
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const acb_poly_t poly, ulong exp, slong prec)
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{
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slong flen, rlen;
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flen = poly->length;
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if (exp == 0)
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{
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acb_poly_one(res);
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}
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else if (flen == 0)
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{
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acb_poly_zero(res);
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}
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else
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{
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rlen = exp * (flen - 1) + 1;
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if (res != poly)
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{
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acb_poly_fit_length(res, rlen);
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_acb_poly_pow_ui(res->coeffs,
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poly->coeffs, flen, exp, prec);
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_acb_poly_set_length(res, rlen);
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_acb_poly_normalise(res);
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}
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else
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{
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acb_poly_t t;
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acb_poly_init2(t, rlen);
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_acb_poly_pow_ui(t->coeffs,
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poly->coeffs, flen, exp, prec);
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_acb_poly_set_length(t, rlen);
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_acb_poly_normalise(t);
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acb_poly_swap(res, t);
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acb_poly_clear(t);
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}
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}
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}
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