Imported gcc-4.4.3

[msp430-gcc.git] / gmp / cxx / ismpq.cc

diff --git a/gmp/cxx/ismpq.cc b/gmp/cxx/ismpq.cc
new file mode 100644 (file)
index 0000000..23eec76
--- /dev/null
+++ b/gmp/cxx/ismpq.cc
@@ -0,0 +1,56 @@
+/* operator>> -- C++-style input of mpq_t.
+
+Copyright 2003 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 <cctype>
+#include <iostream>
+#include <string>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+using namespace std;
+
+
+istream &
+operator>> (istream &i, mpq_ptr q)
+{
+  if (! (i >> mpq_numref(q)))
+    return i;
+
+  char  c = 0;
+  i.get(c); // start reading
+
+  if (c == '/')
+    {
+      // skip slash, read denominator
+      i.get(c);
+      return __gmpz_operator_in_nowhite (i, mpq_denref(q), c);
+    }
+  else
+    {
+      // no denominator, set 1
+      q->_mp_den._mp_size = 1;
+      q->_mp_den._mp_d[0] = 1;
+      if (i.good())
+        i.putback(c);
+      else if (i.eof())
+        i.clear();
+    }
+
+  return i;
+}