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https://github.com/vale981/arb
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36 lines
959 B
C
36 lines
959 B
C
/*
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Copyright (C) 2016 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_set_trunc_round(acb_poly_t res, const acb_poly_t poly, slong n, slong prec)
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{
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if (poly == res)
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{
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acb_poly_truncate(res, n);
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_acb_vec_set_round(res->coeffs, res->coeffs, res->length, prec);
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}
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else
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{
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slong rlen;
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rlen = FLINT_MIN(n, poly->length);
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while (rlen > 0 && acb_is_zero(poly->coeffs + rlen - 1))
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rlen--;
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acb_poly_fit_length(res, rlen);
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_acb_vec_set_round(res->coeffs, poly->coeffs, rlen, prec);
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_acb_poly_set_length(res, rlen);
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}
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}
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