Initial revision

1 files changed, 68 insertions, 0 deletions

diff --git a/mpz/cdiv_qr_ui.c b/mpz/cdiv_qr_ui.c
new file mode 100644
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+++ b/mpz/cdiv_qr_ui.c
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+/* mpz_cdiv_qr_ui -- Division rounding the quotient towards +infinity.  The
+   remainder gets the opposite sign as the denominator.  In order to make it
+   always fit into the return type, the negative of the true remainder is
+   returned.
+
+Copyright (C) 1994, 1995, 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"
+
+unsigned long int
+#if __STDC__
+mpz_cdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
+#else
+mpz_cdiv_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 (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 && dividend_size >= 0)
+    {
+      mpn_add_1 (quot_ptr, quot_ptr, size, (mp_limb_t) 1);
+      remainder_limb = divisor - remainder_limb;
+    }
+
+  size -= size != 0 && quot_ptr[size - 1] == 0;
+  quot->_mp_size = dividend_size >= 0 ? size : -size;
+
+  rem->_mp_d[0] = remainder_limb;
+  rem->_mp_size = -(remainder_limb != 0);
+
+  return remainder_limb;
+}