Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpq / canonicalize.c

diff --git a/gmp/mpq/canonicalize.c b/gmp/mpq/canonicalize.c
new file mode 100644 (file)
index 0000000..e5bedec
--- /dev/null
+++ b/gmp/mpq/canonicalize.c
@@ -0,0 +1,53 @@
+/* mpq_canonicalize(op) -- Remove common factors of the denominator and
+   numerator in OP.
+
+Copyright 1991, 1994, 1995, 1996, 2000, 2001, 2005 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 3 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.  If not, see http://www.gnu.org/licenses/.  */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+mpq_canonicalize (MP_RAT *op)
+{
+  mpz_t gcd;
+  TMP_DECL;
+
+  if (op->_mp_den._mp_size == 0)
+    DIVIDE_BY_ZERO;
+
+  TMP_MARK;
+
+  /* ??? Dunno if the 1+ is needed.  */
+  MPZ_TMP_INIT (gcd, 1 + MAX (ABS (op->_mp_num._mp_size),
+                             ABS (op->_mp_den._mp_size)));
+
+  mpz_gcd (gcd, &(op->_mp_num), &(op->_mp_den));
+  if (! MPZ_EQUAL_1_P (gcd))
+    {
+      mpz_divexact_gcd (&(op->_mp_num), &(op->_mp_num), gcd);
+      mpz_divexact_gcd (&(op->_mp_den), &(op->_mp_den), gcd);
+    }
+
+  if (op->_mp_den._mp_size < 0)
+    {
+      op->_mp_num._mp_size = -op->_mp_num._mp_size;
+      op->_mp_den._mp_size = -op->_mp_den._mp_size;
+    }
+  TMP_FREE;
+}