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/* mpz_tdiv_q -- divide two integers and produce a quotient.
Copyright 1991, 1993, 1994, 1996, 2000, 2001, 2005, 2010 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 Lesser General Public License as published by
the Free Software Foundation; either version 3 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include "gmp.h"
#include "gmp-impl.h"
#include "longlong.h"
void
mpz_tdiv_q (mpz_ptr quot, mpz_srcptr num, mpz_srcptr den)
{
mp_size_t ql;
mp_size_t ns, ds, nl, dl;
mp_ptr np, dp, qp;
TMP_DECL;
ns = SIZ (num);
ds = SIZ (den);
nl = ABS (ns);
dl = ABS (ds);
ql = nl - dl + 1;
if (dl == 0)
DIVIDE_BY_ZERO;
if (ql <= 0)
{
SIZ (quot) = 0;
return;
}
MPZ_REALLOC (quot, ql);
TMP_MARK;
qp = PTR (quot);
np = PTR (num);
dp = PTR (den);
/* Copy denominator to temporary space if it overlaps with the quotient. */
if (dp == qp)
{
mp_ptr tp;
tp = TMP_ALLOC_LIMBS (dl);
MPN_COPY (tp, dp, dl);
dp = tp;
}
/* Copy numerator to temporary space if it overlaps with the quotient. */
if (np == qp)
{
mp_ptr tp;
tp = TMP_ALLOC_LIMBS (nl + 1);
MPN_COPY (tp, np, nl);
/* Overlap dividend and scratch. */
mpn_div_q (qp, tp, nl, dp, dl, tp);
}
else
{
mp_ptr tp;
tp = TMP_ALLOC_LIMBS (nl + 1);
mpn_div_q (qp, np, nl, dp, dl, tp);
}
ql -= qp[ql - 1] == 0;
SIZ (quot) = (ns ^ ds) >= 0 ? ql : -ql;
TMP_FREE;
}
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