Annotation of OpenXM_contrib/gmp/tests/rand/zdiv_round.c, Revision 1.1.1.2
1.1 maekawa 1: /* zdiv_round() -- divide integers, round to nearest */
2:
3: /*
1.1.1.2 ! ohara 4: Copyright 1999 Free Software Foundation, Inc.
1.1 maekawa 5:
6: This file is part of the GNU MP Library.
7:
8: The GNU MP Library is free software; you can redistribute it and/or modify
9: it under the terms of the GNU Lesser General Public License as published by
10: the Free Software Foundation; either version 2.1 of the License, or (at your
11: option) any later version.
12:
13: The GNU MP Library is distributed in the hope that it will be useful, but
14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16: License for more details.
17:
18: You should have received a copy of the GNU Lesser General Public License
19: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
21: MA 02111-1307, USA.
22: */
23:
24: #include "gmp.h"
25:
26: void
27: zdiv_round (mpz_t rop, mpz_t n, mpz_t d)
28: {
29: mpf_t f_n, f_d;
30:
31: mpf_init (f_n);
32: mpf_init (f_d);
33:
34: mpf_set_z (f_d, d);
35: mpf_set_z (f_n, n);
36:
37: mpf_div (f_n, f_n, f_d);
38: mpf_set_d (f_d, .5);
39: if (mpf_sgn (f_n) < 0)
40: mpf_neg (f_d, f_d);
41: mpf_add (f_n, f_n, f_d);
42: mpz_set_f (rop, f_n);
43:
44: mpf_clear (f_n);
45: mpf_clear (f_d);
46: return;
47: }
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