1 /* mpz_fdiv_qr_ui -- Division rounding the quotient towards -infinity.
2 The remainder gets the same sign as the denominator.
4 Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Library General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or (at your
11 option) any later version.
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 Library General Public
16 License for more details.
18 You should have received a copy of the GNU Library 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. */
28 mpz_fdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
30 mpz_fdiv_qr_ui (quot, rem, dividend, divisor)
34 unsigned long int divisor;
37 mp_size_t dividend_size;
40 mp_limb_t remainder_limb;
42 dividend_size = dividend->_mp_size;
43 size = ABS (dividend_size);
45 if (quot->_mp_alloc < size)
46 _mpz_realloc (quot, size);
48 quot_ptr = quot->_mp_d;
50 remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
53 if (remainder_limb != 0 && dividend_size < 0)
55 mpn_add_1 (quot_ptr, quot_ptr, size, (mp_limb_t) 1);
56 remainder_limb = divisor - remainder_limb;
59 size -= size != 0 && quot_ptr[size - 1] == 0;
60 quot->_mp_size = dividend_size >= 0 ? size : -size;
62 rem->_mp_d[0] = remainder_limb;
63 rem->_mp_size = remainder_limb != 0;
65 return remainder_limb;