Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpz / lcm.c

diff --git a/rts/gmp/mpz/lcm.c b/rts/gmp/mpz/lcm.c
new file mode 100644 (file)
index 0000000..7495882
--- /dev/null
+++ b/rts/gmp/mpz/lcm.c
@@ -0,0 +1,61 @@
+/* mpz/lcm.c:   Calculate the least common multiple of two integers.
+
+Copyright (C) 1996, 2000 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 Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public
+License for more details.
+
+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
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+
+void *_mpz_realloc ();
+
+void
+#if __STDC__
+mpz_lcm (mpz_ptr r, mpz_srcptr u, mpz_srcptr v)
+#else
+mpz_lcm (r, u, v)
+     mpz_ptr r;
+     mpz_srcptr u;
+     mpz_srcptr v;
+#endif
+{
+  mpz_t g;
+  mp_size_t usize, vsize, size;
+  TMP_DECL (marker);
+
+  TMP_MARK (marker);
+
+  usize = ABS (SIZ (u));
+  vsize = ABS (SIZ (v));
+
+  if (usize == 0 || vsize == 0)
+    {
+      SIZ (r) = 0;
+      return;
+    }
+
+  size = MAX (usize, vsize);
+  MPZ_TMP_INIT (g, size);
+
+  mpz_gcd (g, u, v);
+  mpz_divexact (g, u, g);
+  mpz_mul (r, g, v);
+
+  TMP_FREE (marker);
+}