Annotation of OpenXM_contrib/gmp/tests/rand/zdiv_round.c, Revision 1.1
1.1 ! maekawa 1: /* zdiv_round() -- divide integers, round to nearest */
! 2:
! 3: /*
! 4: Copyright (C) 1999 Free Software Foundation, Inc.
! 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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