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diff --git a/libstdc++-v3/testsuite/22_locale/codecvt/in/wchar_t/1.cc b/libstdc++-v3/testsuite/22_locale/codecvt/in/wchar_t/1.cc
new file mode 100644
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+++ b/libstdc++-v3/testsuite/22_locale/codecvt/in/wchar_t/1.cc
@@ -0,0 +1,86 @@
+// 2000-08-17 Benjamin Kosnik <bkoz@cygnus.com>
+
+// Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+// Free Software Foundation
+//
+// This file is part of the GNU ISO C++ Library.  This 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 3, or (at your option)
+// any later version.
+
+// This 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 this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
+
+#include <locale>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+// Need to explicitly set the state(mbstate_t) to zero.
+// How to do this is not specified by the ISO C99 standard, so we
+// might need to add some operators to make the intuiative case
+// work:
+//   w_codecvt::state_type state00;
+//   state00 = 0;  
+// or, can use this explicit "C" initialization:
+//   w_codecvt::state_type state01 = {0, 0};
+// .. except Ulrich says: Use memset. Always use memset. Feel the force...
+void
+zero_state(std::mbstate_t& state)
+{ std::memset(&state, 0, sizeof(std::mbstate_t)); }
+
+// Required instantiation
+// codecvt<wchar_t, char, mbstate_t>
+//
+// Baseline test for "C" locale
+void test01()
+{
+  using namespace std;
+  typedef codecvt<wchar_t, char, mbstate_t> 	w_codecvt;
+  typedef codecvt_base::result			result;
+  typedef wchar_t				int_type;
+  typedef char					ext_type;
+  typedef char_traits<wchar_t>			int_traits;
+
+  bool test __attribute__((unused)) = true;
+  const ext_type* 	e_lit = "black pearl jasmine tea";
+  const ext_type*       efrom_next;
+  const int_type* 	i_lit = L"black pearl jasmine tea";
+  size_t 		size = strlen(e_lit);
+  int_type* 		i_arr = new int_type[size + 1];
+  int_type* 		i_ref = new int_type[size + 1];
+  wmemset(i_arr, static_cast<wchar_t>(0xdeadbeef), size + 1);
+  wmemset(i_ref, static_cast<wchar_t>(0xdeadbeef), size + 1);
+  int_type*		ito_next;
+
+  locale 		loc;
+  const w_codecvt* 	cvt = &use_facet<w_codecvt>(loc); 
+
+  // in
+  w_codecvt::state_type state01;
+  zero_state(state01);
+  result r1 = cvt->in(state01, e_lit, e_lit + size, efrom_next, 
+		      i_arr, i_arr + size, ito_next);
+  VERIFY( r1 == codecvt_base::ok );
+  VERIFY( efrom_next == e_lit + size );
+  VERIFY( ito_next == i_arr + size );
+  VERIFY( !int_traits::compare(i_arr, i_lit, size) ); 
+  VERIFY( !int_traits::compare(ito_next, i_ref, 1) );
+
+  delete [] i_arr;
+  delete [] i_ref;
+}
+
+int main ()
+{
+  test01();
+  return 0;
+}