65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
|
/* mpz_cdiv_q_ui -- Division rounding the quotient towards +infinity. The
|
||
|
|
remainder gets the opposite sign as the denominator. In order to make it
|
||
|
|
always fit into the return type, the negative of the true remainder is
|
||
|
|
returned.
|
||
|
|
|
||
|
|
Copyright (C) 1994, 1996 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file is part of the GNU MP Library.
|
||
|
|
|
||
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Library General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
option) any later version.
|
||
|
|
|
||
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
||
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
|
||
|
|
License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public License
|
||
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
||
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
||
|
|
MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include "gmp.h"
|
||
|
|
#include "gmp-impl.h"
|
||
|
|
|
||
|
|
unsigned long int
|
||
|
|
#if __STDC__
|
||
|
|
mpz_cdiv_q_ui (mpz_ptr quot, mpz_srcptr dividend, unsigned long int divisor)
|
||
|
|
#else
|
||
|
|
mpz_cdiv_q_ui (quot, dividend, divisor)
|
||
|
|
mpz_ptr quot;
|
||
|
|
mpz_srcptr dividend;
|
||
|
|
unsigned long int divisor;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
mp_size_t dividend_size;
|
||
|
|
mp_size_t size;
|
||
|
|
mp_ptr quot_ptr;
|
||
|
|
mp_limb_t remainder_limb;
|
||
|
|
|
||
|
|
dividend_size = dividend->_mp_size;
|
||
|
|
size = ABS (dividend_size);
|
||
|
|
|
||
|
|
if (quot->_mp_alloc < size)
|
||
|
|
_mpz_realloc (quot, size);
|
||
|
|
|
||
|
|
quot_ptr = quot->_mp_d;
|
||
|
|
|
||
|
|
remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
|
||
|
|
(mp_limb_t) divisor);
|
||
|
|
|
||
|
|
if (remainder_limb != 0 && dividend_size >= 0)
|
||
|
|
{
|
||
|
|
mpn_add_1 (quot_ptr, quot_ptr, size, (mp_limb_t) 1);
|
||
|
|
remainder_limb = divisor - remainder_limb;
|
||
|
|
}
|
||
|
|
|
||
|
|
size -= size != 0 && quot_ptr[size - 1] == 0;
|
||
|
|
quot->_mp_size = dividend_size >= 0 ? size : -size;
|
||
|
|
|
||
|
|
return remainder_limb;
|
||
|
|
}
|