Annotation of OpenXM_contrib/gmp/mpz/fdiv_q_ui.c, Revision 1.1.1.2
1.1 maekawa 1: /* mpz_fdiv_q_ui -- Division rounding the quotient towards -infinity.
2: The remainder gets the same sign as the denominator.
3:
1.1.1.2 ! maekawa 4: Copyright (C) 1994, 1995, 1996, 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
1.1.1.2 ! maekawa 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
1.1 maekawa 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
1.1.1.2 ! maekawa 15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
1.1 maekawa 16: License for more details.
17:
1.1.1.2 ! maekawa 18: You should have received a copy of the GNU Lesser General Public License
1.1 maekawa 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: #include "gmp.h"
24: #include "gmp-impl.h"
25:
26: unsigned long int
27: #if __STDC__
28: mpz_fdiv_q_ui (mpz_ptr quot, mpz_srcptr dividend, unsigned long int divisor)
29: #else
30: mpz_fdiv_q_ui (quot, dividend, divisor)
31: mpz_ptr quot;
32: mpz_srcptr dividend;
33: unsigned long int divisor;
34: #endif
35: {
36: mp_size_t dividend_size;
37: mp_size_t size;
38: mp_ptr quot_ptr;
39: mp_limb_t remainder_limb;
40:
1.1.1.2 ! maekawa 41: if (divisor == 0)
! 42: DIVIDE_BY_ZERO;
! 43:
1.1 maekawa 44: dividend_size = dividend->_mp_size;
45: size = ABS (dividend_size);
46:
47: if (quot->_mp_alloc < size)
48: _mpz_realloc (quot, size);
49:
50: quot_ptr = quot->_mp_d;
51:
52: remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
53: (mp_limb_t) divisor);
54:
55: if (remainder_limb != 0 && dividend_size < 0)
56: {
1.1.1.2 ! maekawa 57: mpn_incr_u (quot_ptr, (mp_limb_t) 1);
1.1 maekawa 58: remainder_limb = divisor - remainder_limb;
59: }
60:
61: size -= size != 0 && quot_ptr[size - 1] == 0;
62: quot->_mp_size = dividend_size >= 0 ? size : -size;
63:
64: return remainder_limb;
65: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>