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/* mpz_tdiv_qr_ui(quot,rem,dividend,short_divisor) --
Set QUOT to DIVIDEND / SHORT_DIVISOR
and REM to DIVIDEND mod SHORT_DIVISOR.
Copyright (C) 1991, 1993, 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"
void
#if __STDC__
mpz_tdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
#else
mpz_tdiv_qr_ui (quot, rem, dividend, divisor)
mpz_ptr quot;
mpz_ptr rem;
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 (size == 0)
{
quot->_mp_size = 0;
rem->_mp_size = 0;
return;
}
/* No need for temporary allocation and copying if QUOT == DIVIDEND as
the divisor is just one limb, and thus no intermediate remainders
need to be stored. */
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)
rem->_mp_size = 0;
else
{
/* Store the single-limb remainder. We don't check if there's space
for just one limb, since no function ever makes zero space. */
rem->_mp_size = dividend_size >= 0 ? 1 : -1;
rem->_mp_d[0] = remainder_limb;
}
/* The quotient is SIZE limbs, but the most significant might be zero. */
size -= quot_ptr[size - 1] == 0;
quot->_mp_size = dividend_size >= 0 ? size : -size;
}
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