44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* 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 test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
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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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