48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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/* zdiv_round() -- divide integers, round to nearest */
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/*
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Copyright 1999 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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#include "gmp.h"
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void
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zdiv_round (mpz_t rop, mpz_t n, mpz_t d)
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{
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mpf_t f_n, f_d;
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mpf_init (f_n);
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mpf_init (f_d);
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mpf_set_z (f_d, d);
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mpf_set_z (f_n, n);
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mpf_div (f_n, f_n, f_d);
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mpf_set_d (f_d, .5);
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if (mpf_sgn (f_n) < 0)
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mpf_neg (f_d, f_d);
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mpf_add (f_n, f_n, f_d);
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mpz_set_f (rop, f_n);
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mpf_clear (f_n);
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mpf_clear (f_d);
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return;
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}
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