From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001
From: Duncan Wilkie <antigravityd@gmail.com>
Date: Sat, 18 Nov 2023 06:11:09 -0600
Subject: Initial commit.

---
 gmp-6.3.0/mpz/tdiv_qr.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 gmp-6.3.0/mpz/tdiv_qr.c

(limited to 'gmp-6.3.0/mpz/tdiv_qr.c')

diff --git a/gmp-6.3.0/mpz/tdiv_qr.c b/gmp-6.3.0/mpz/tdiv_qr.c
new file mode 100644
index 0000000..ad82945
--- /dev/null
+++ b/gmp-6.3.0/mpz/tdiv_qr.c
@@ -0,0 +1,111 @@
+/* mpz_tdiv_qr(quot,rem,dividend,divisor) -- Set QUOT to DIVIDEND/DIVISOR,
+   and REM to DIVIDEND mod DIVISOR.
+
+Copyright 1991, 1993, 1994, 2000, 2001, 2005, 2011, 2012, 2021 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 either:
+
+  * 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.
+
+or
+
+  * the GNU General Public License as published by the Free Software
+    Foundation; either version 2 of the License, or (at your option) any
+    later version.
+
+or both in parallel, as here.
+
+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 General Public License
+for more details.
+
+You should have received copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library.  If not,
+see https://www.gnu.org/licenses/.  */
+
+#include "gmp-impl.h"
+#include "longlong.h"
+
+void
+mpz_tdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr num, mpz_srcptr den)
+{
+  mp_size_t ql, n0;
+  mp_size_t ns, ds, nl, dl;
+  mp_ptr np, dp, qp, rp;
+  TMP_DECL;
+
+  ns = SIZ (num);
+  ds = SIZ (den);
+  nl = ABS (ns);
+  dl = ABS (ds);
+  ql = nl - dl + 1;
+
+  if (UNLIKELY (dl == 0))
+    DIVIDE_BY_ZERO;
+
+  rp = MPZ_REALLOC (rem, dl);
+
+  if (ql <= 0)
+    {
+      if (num != rem)
+	{
+	  np = PTR (num);
+	  MPN_COPY (rp, np, nl);
+	  SIZ (rem) = SIZ (num);
+	}
+      /* This needs to follow the assignment to rem, in case the
+	 numerator and quotient are the same.  */
+      SIZ (quot) = 0;
+      return;
+    }
+
+  qp = MPZ_REALLOC (quot, ql);
+
+  TMP_MARK;
+  np = PTR (num);
+  dp = PTR (den);
+
+  /* FIXME: We should think about how to handle the temporary allocation.
+     Perhaps mpn_tdiv_qr should handle it, since it anyway often needs to
+     allocate temp space.  */
+
+  /* Copy denominator to temporary space if it overlaps with the quotient
+     or remainder.  */
+  if (dp == rp || 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 or
+     remainder.  */
+  if (np == rp || np == qp)
+    {
+      mp_ptr tp;
+      tp = TMP_ALLOC_LIMBS (nl);
+      MPN_COPY (tp, np, nl);
+      np = tp;
+    }
+
+  for (n0 = 0; *dp == 0; ++dp)
+    {
+      rp [n0++] = *np++;
+      --nl;
+    }
+  mpn_tdiv_qr (qp, rp + n0, 0L, np, nl, dp, dl - n0);
+
+  ql -=  qp[ql - 1] == 0;
+  MPN_NORMALIZE (rp, dl);
+
+  SIZ (quot) = (ns ^ ds) >= 0 ? ql : -ql;
+  SIZ (rem) = ns >= 0 ? dl : -dl;
+  TMP_FREE;
+}
-- 
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