[project @ 1996-01-08 20:28:12 by partain]

[ghc-hetmet.git] / ghc / runtime / gmp / mpz_mdm_ui.c

diff --git a/ghc/runtime/gmp/mpz_mdm_ui.c b/ghc/runtime/gmp/mpz_mdm_ui.c
new file mode 100644 (file)
index 0000000..cf41912
--- /dev/null
+++ b/ghc/runtime/gmp/mpz_mdm_ui.c
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+/* mpz_mdivmod -- Mathematical DIVision and MODulo, i.e. division that rounds
+   the quotient towards -infinity, and with the remainder non-negative.
+
+Copyright (C) 1991, 1992 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 General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+unsigned long int
+#ifdef __STDC__
+mpz_mdivmod_ui (MP_INT *quot, MP_INT *rem,
+               const MP_INT *dividend, unsigned long int divisor)
+#else
+mpz_mdivmod_ui (quot, rem, dividend, divisor)
+     MP_INT *quot;
+     MP_INT *rem;
+     const MP_INT *dividend;
+     unsigned long int divisor;
+#endif
+{
+  MP_INT temp_rem;             /* N.B.: lives until function returns! */
+
+  /* If the user doesn't want the remainder to be stored in an integer
+     object, allocate a scratch variable for it.  */
+  if (rem == NULL)
+    {
+      MPZ_TMP_INIT (&temp_rem, 1 + ABS (dividend->size));
+      rem = &temp_rem;
+    }
+
+  mpz_divmod_ui (quot, rem, dividend, divisor);
+
+  if (rem->size < 0)
+    {
+      mpz_sub_ui (quot, quot, 1);
+      mpz_add_ui (rem, rem, divisor);
+    }
+
+  if (rem->size == 0)
+    return 0;
+  return rem->d[0];
+}