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// 2001-05-21 Benjamin Kosnik <>
// Copyright (C) 2001-2021 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
// 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
// <>.
// Overridden virtual functions
#include <sstream>
#include <testsuite_hooks.h>
void test02(std::stringbuf& in, bool pass)
using namespace std;
typedef streambuf::pos_type pos_type;
typedef streambuf::off_type off_type;
pos_type bad = pos_type(off_type(-1));
pos_type p = 0;
// seekoff
p = in.pubseekoff(0, ios_base::beg, ios_base::in);
if (pass)
VERIFY( p != bad );
p = in.pubseekoff(0, ios_base::beg, ios_base::out);
VERIFY( p == bad );
p = in.pubseekoff(0, ios_base::beg);
VERIFY( p == bad );
int main()
using namespace std;
// movie star, submarine scientist!
stringbuf in1("Hedy Lamarr", ios_base::in);
stringbuf in2(ios_base::in);
stringbuf in3("", ios_base::in);
test02(in1, true);
test02(in2, false);
test02(in3, false);
return 0;