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// Copyright (C) 2010-2015 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/>.
// { dg-require-fileio "" }
#include <fstream>
#include <testsuite_hooks.h>
const char name_01[] = "tmp_seekoff_45628.tst";
unsigned underflows, overflows;
class my_filebuf
: public std::filebuf
{
virtual int_type
underflow()
{
++underflows;
return std::filebuf::underflow();
}
virtual int_type
overflow(int_type c)
{
++overflows;
return std::filebuf::overflow(c);
}
};
// libstdc++/45628
void test01()
{
bool test __attribute__((unused)) = true;
my_filebuf q;
q.open(name_01, std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
q.sputc('a');
q.pubseekoff(0, std::ios_base::cur);
q.sputc('b');
q.pubseekoff(0, std::ios_base::cur);
q.sputc('c');
q.pubseekoff(0, std::ios_base::cur);
VERIFY( overflows <= 1 ); // only initial sputc allowed to overflow
q.pubseekoff(0, std::ios_base::beg);
q.sbumpc();
VERIFY( underflows == 1 );
q.pubseekoff(0, std::ios_base::cur);
q.sbumpc();
q.pubseekoff(0, std::ios_base::cur);
q.sbumpc();
q.pubseekoff(0, std::ios_base::cur);
VERIFY( underflows == 1 );
}
int main()
{
test01();
return 0;
}
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