version 1.1.1.1, 2000/01/10 15:35:27 |
version 1.1.1.2, 2000/09/09 14:12:59 |
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/* mpz_tdiv_qr(quot,rem,dividend,divisor) -- Set QUOT to DIVIDEND/DIVISOR, |
/* mpz_tdiv_qr(quot,rem,dividend,divisor) -- Set QUOT to DIVIDEND/DIVISOR, |
and REM to DIVIDEND mod DIVISOR. |
and REM to DIVIDEND mod DIVISOR. |
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Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. |
Copyright (C) 1991, 1993, 1994, 2000 Free Software Foundation, Inc. |
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This file is part of the GNU MP Library. |
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 |
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 |
it under the terms of the GNU Lesser General Public License as published by |
the Free Software Foundation; either version 2 of the License, or (at your |
the Free Software Foundation; either version 2.1 of the License, or (at your |
option) any later version. |
option) any later version. |
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The GNU MP Library is distributed in the hope that it will be useful, but |
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 |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
License for more details. |
License for more details. |
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You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Lesser General Public License |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
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, |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
MA 02111-1307, USA. */ |
MA 02111-1307, USA. */ |
Line 23 MA 02111-1307, USA. */ |
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Line 23 MA 02111-1307, USA. */ |
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#include "gmp.h" |
#include "gmp.h" |
#include "gmp-impl.h" |
#include "gmp-impl.h" |
#include "longlong.h" |
#include "longlong.h" |
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#ifdef BERKELEY_MP |
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#include "mp.h" |
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#endif |
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#ifndef BERKELEY_MP |
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void |
void |
#if __STDC__ |
#if __STDC__ |
mpz_tdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr num, mpz_srcptr den) |
mpz_tdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr num, mpz_srcptr den) |
Line 35 mpz_tdiv_qr (quot, rem, num, den) |
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Line 41 mpz_tdiv_qr (quot, rem, num, den) |
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mpz_srcptr den; |
mpz_srcptr den; |
#endif |
#endif |
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#define COMPUTE_QUOTIENT |
#else /* BERKELEY_MP */ |
#include "dmincl.c" |
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void |
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#if __STDC__ |
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mdiv (mpz_srcptr num, mpz_srcptr den, mpz_ptr quot, mpz_ptr rem) |
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#else |
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mdiv (num, den, quot, rem) |
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mpz_srcptr num; |
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mpz_srcptr den; |
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mpz_ptr quot; |
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mpz_ptr rem; |
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#endif |
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#endif /* BERKELEY_MP */ |
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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 (marker); |
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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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/* This needs to follow the assignment to rem, in case the |
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numerator and quotient are the same. */ |
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SIZ (quot) = 0; |
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return; |
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} |
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MPZ_REALLOC (quot, ql); |
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TMP_MARK (marker); |
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qp = PTR (quot); |
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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 quotient |
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or remainder. */ |
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if (dp == rp || dp == qp) |
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{ |
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mp_ptr tp; |
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tp = (mp_ptr) TMP_ALLOC (dl * BYTES_PER_MP_LIMB); |
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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 quotient or |
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remainder. */ |
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if (np == rp || np == qp) |
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{ |
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mp_ptr tp; |
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tp = (mp_ptr) TMP_ALLOC (nl * BYTES_PER_MP_LIMB); |
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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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ql -= qp[ql - 1] == 0; |
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MPN_NORMALIZE (rp, dl); |
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SIZ (quot) = (ns ^ ds) >= 0 ? ql : -ql; |
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SIZ (rem) = ns >= 0 ? dl : -dl; |
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TMP_FREE (marker); |
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} |