1 /* mpz_tdiv_qr_ui(quot,rem,dividend,short_divisor) --
2 Set QUOT to DIVIDEND / SHORT_DIVISOR
3 and REM to DIVIDEND mod SHORT_DIVISOR.
5 Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc.
7 This file is part of the GNU MP Library.
9 The GNU MP Library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Library General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or (at your
12 option) any later version.
14 The GNU MP Library is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
17 License for more details.
19 You should have received a copy of the GNU Library General Public License
20 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 MA 02111-1307, USA. */
29 mpz_tdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
31 mpz_tdiv_qr_ui (quot, rem, dividend, divisor)
35 unsigned long int divisor;
38 mp_size_t dividend_size;
41 mp_limb_t remainder_limb;
43 dividend_size = dividend->_mp_size;
44 size = ABS (dividend_size);
53 /* No need for temporary allocation and copying if QUOT == DIVIDEND as
54 the divisor is just one limb, and thus no intermediate remainders
57 if (quot->_mp_alloc < size)
58 _mpz_realloc (quot, size);
60 quot_ptr = quot->_mp_d;
62 remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
65 if (remainder_limb == 0)
69 /* Store the single-limb remainder. We don't check if there's space
70 for just one limb, since no function ever makes zero space. */
71 rem->_mp_size = dividend_size >= 0 ? 1 : -1;
72 rem->_mp_d[0] = remainder_limb;
75 /* The quotient is SIZE limbs, but the most significant might be zero. */
76 size -= quot_ptr[size - 1] == 0;
77 quot->_mp_size = dividend_size >= 0 ? size : -size;