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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* mpz_tdiv_r(rem, dividend, divisor) -- Set REM to DIVIDEND mod DIVISOR.
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Copyright 1991, 1993, 1994, 2000, 2001, 2005 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "longlong.h"
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void
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mpz_tdiv_r (mpz_ptr rem, mpz_srcptr num, mpz_srcptr den)
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{
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mp_size_t ql;
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mp_size_t ns, ds, nl, dl;
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mp_ptr np, dp, qp, rp;
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TMP_DECL;
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ns = SIZ (num);
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ds = SIZ (den);
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nl = ABS (ns);
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dl = ABS (ds);
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ql = nl - dl + 1;
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if (dl == 0)
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DIVIDE_BY_ZERO;
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MPZ_REALLOC (rem, dl);
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if (ql <= 0)
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{
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if (num != rem)
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{
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mp_ptr np, rp;
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np = PTR (num);
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rp = PTR (rem);
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MPN_COPY (rp, np, nl);
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SIZ (rem) = SIZ (num);
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}
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return;
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}
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TMP_MARK;
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qp = TMP_ALLOC_LIMBS (ql);
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rp = PTR (rem);
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np = PTR (num);
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dp = PTR (den);
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/* FIXME: We should think about how to handle the temporary allocation.
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Perhaps mpn_tdiv_qr should handle it, since it anyway often needs to
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allocate temp space. */
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/* Copy denominator to temporary space if it overlaps with the remainder. */
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if (dp == rp)
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{
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mp_ptr tp;
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tp = TMP_ALLOC_LIMBS (dl);
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MPN_COPY (tp, dp, dl);
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dp = tp;
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}
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/* Copy numerator to temporary space if it overlaps with the remainder. */
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if (np == rp)
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{
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mp_ptr tp;
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tp = TMP_ALLOC_LIMBS (nl);
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MPN_COPY (tp, np, nl);
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np = tp;
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}
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mpn_tdiv_qr (qp, rp, 0L, np, nl, dp, dl);
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MPN_NORMALIZE (rp, dl);
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SIZ (rem) = ns >= 0 ? dl : -dl;
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TMP_FREE;
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}
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