--- /dev/null
+// 2003-05-03 Petur Runolfsson <peturr02@ru.is>
+
+// Copyright (C) 2003, 2009 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 <locale>
+#include <string>
+#include <testsuite_hooks.h>
+
+// Check that basic_filebuf::underflow() handles
+// codecvt::always_noconv() == false and codecvt::in() == noconv.
+class NoconvCvt : public std::codecvt<char, char, std::mbstate_t>
+{
+protected:
+ virtual bool
+ do_always_noconv() const throw()
+ { return false; }
+
+ virtual result
+ do_in(state_type&, const char* from, const char*, const char*& from_next,
+ char* to, char*, char*& to_next)
+ {
+ from_next = from;
+ to_next = to;
+ return noconv;
+ }
+};
+
+void test01()
+{
+ using namespace std;
+ bool test __attribute__((unused)) = true;
+ const char* name = "filebuf_virtuals-1.txt";
+
+ string str;
+ filebuf fb;
+ filebuf::int_type c1;
+
+ if (fb.open(name, ios_base::in))
+ {
+ while ((c1 = fb.sbumpc()) != EOF)
+ str.push_back(filebuf::traits_type::to_char_type(c1));
+ fb.close();
+ }
+
+ locale loc(locale::classic(), new NoconvCvt);
+ fb.pubimbue(loc);
+
+ if (fb.open(name, ios_base::in))
+ {
+ for (string::iterator i = str.begin(); i != str.end(); ++i)
+ {
+ c1 = fb.sbumpc();
+ VERIFY( c1 != filebuf::traits_type::eof() );
+ VERIFY( c1 == filebuf::traits_type::to_int_type(*i) );
+ }
+ VERIFY( fb.sgetc() == filebuf::traits_type::eof() );
+ fb.close();
+ }
+}
+
+int main()
+{
+ test01();
+ return 0;
+}