Index: testsuite/27_io/basic_filebuf/seekoff/wchar_t/4.cc
===================================================================
--- testsuite/27_io/basic_filebuf/seekoff/wchar_t/4.cc	(revision 0)
+++ testsuite/27_io/basic_filebuf/seekoff/wchar_t/4.cc	(revision 0)
@@ -0,0 +1,85 @@
+// { dg-require-fileio "" }
+
+// Copyright (C) 2010 Free Software Foundation, Inc.
+//
+// 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <cwchar>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef wfilebuf::pos_type pos_type;
+  const char name[] = "tmp_seekoff-4.tst";
+
+  const size_t size = 10;
+  wchar_t buf[size];
+  streamsize n;
+
+  wfilebuf fb;
+  fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
+
+  n = fb.sputn(L"abcd", 4);
+  VERIFY( n == 4 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, 3);
+  VERIFY( n == 3 );
+  VERIFY( !wmemcmp(buf, L"abc", 3) );
+
+  fb.pubseekoff(0, ios_base::cur);
+
+  n = fb.sputn(L"ef", 2);
+  VERIFY( n == 2 );
+
+  fb.pubseekoff(0, ios_base::beg);
+
+  n = fb.sgetn(buf, size);
+  VERIFY( n == 5 );
+  VERIFY( !wmemcmp(buf, L"abcef", 5) );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sputn(L"ghijkl", 6);
+  VERIFY( n == 6 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, 2);
+  VERIFY( n == 2 );
+  VERIFY( !wmemcmp(buf, L"gh", 2) );
+
+  fb.pubseekoff(0, ios_base::end);
+  n = fb.sputn(L"mno", 3);
+  VERIFY( n == 3 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, size);
+  VERIFY( n == 9 );
+  VERIFY( !wmemcmp(buf, L"ghijklmno", 9) );
+
+  fb.close();
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
Index: testsuite/27_io/basic_filebuf/seekoff/char/4.cc
===================================================================
--- testsuite/27_io/basic_filebuf/seekoff/char/4.cc	(revision 0)
+++ testsuite/27_io/basic_filebuf/seekoff/char/4.cc	(revision 0)
@@ -0,0 +1,85 @@
+// { dg-require-fileio "" }
+
+// Copyright (C) 2010 Free Software Foundation, Inc.
+//
+// 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef filebuf::pos_type pos_type;
+  const char name[] = "tmp_seekoff-4.tst";
+
+  const size_t size = 10;
+  char buf[size];
+  streamsize n;
+
+  filebuf fb;
+  fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
+
+  n = fb.sputn("abcd", 4);
+  VERIFY( n == 4 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, 3);
+  VERIFY( n == 3 );
+  VERIFY( !memcmp(buf, "abc", 3) );
+
+  fb.pubseekoff(0, ios_base::cur);
+
+  n = fb.sputn("ef", 2);
+  VERIFY( n == 2 );
+
+  fb.pubseekoff(0, ios_base::beg);
+
+  n = fb.sgetn(buf, size);
+  VERIFY( n == 5 );
+  VERIFY( !memcmp(buf, "abcef", 5) );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sputn("ghijkl", 6);
+  VERIFY( n == 6 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, 2);
+  VERIFY( n == 2 );
+  VERIFY( !memcmp(buf, "gh", 2) );
+
+  fb.pubseekoff(0, ios_base::end);
+  n = fb.sputn("mno", 3);
+  VERIFY( n == 3 );
+
+  fb.pubseekoff(0, ios_base::beg);
+  n = fb.sgetn(buf, size);
+  VERIFY( n == 9 );
+  VERIFY( !memcmp(buf, "ghijklmno", 9) );
+
+  fb.close();
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
