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// Copyright (C) 2010-2016 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>
#include <testsuite_character.h>
const char name_01[] = "tmp_seekoff_45628.tst";
unsigned underflows, overflows;
class my_filebuf
: public std::basic_filebuf<__gnu_test::pod_uchar>
{
virtual int_type
underflow()
{
++underflows;
return std::basic_filebuf<__gnu_test::pod_uchar>::underflow();
}
virtual int_type
overflow(int_type c)
{
++overflows;
return std::basic_filebuf<__gnu_test::pod_uchar>::overflow(c);
}
};
// libstdc++/45628
void test01()
{
bool test __attribute__((unused)) = true;
using __gnu_test::pod_uchar;
std::locale loc(std::locale::classic(),
new std::codecvt<my_filebuf::traits_type::char_type, char,
my_filebuf::traits_type::state_type>);
my_filebuf::pos_type opos[3], ipos[3];
my_filebuf q;
q.pubimbue(loc);
q.open(name_01, std::ios_base::in | std::ios_base::out
| std::ios_base::trunc);
q.sputc(pod_uchar::from<char>('a'));
opos[0] = q.pubseekoff(0, std::ios_base::cur);
q.sputc(pod_uchar::from<char>('b'));
opos[1] = q.pubseekoff(0, std::ios_base::cur);
q.sputc(pod_uchar::from<char>('c'));
opos[2] = q.pubseekoff(0, std::ios_base::cur);
VERIFY( overflows <= 9 ); // pubseekoff calls overflow twice if converting.
// NB: checking opos==ipos is not very rigorous as long as it flushes, since
// all positions will be at initial state.
q.pubseekoff(0, std::ios_base::beg);
q.sbumpc();
VERIFY( underflows == 1 );
ipos[0] = q.pubseekoff(0, std::ios_base::cur);
VERIFY( ipos[0] == opos[0] );
q.sbumpc();
ipos[1] = q.pubseekoff(0, std::ios_base::cur);
VERIFY( ipos[1] == opos[1] );
q.sbumpc();
ipos[2] = q.pubseekoff(0, std::ios_base::cur);
VERIFY( ipos[2] == opos[2] );
VERIFY( underflows == 1 ); // pubseekoff never flushes get area
// Bonus test: check automatic mode switches.
q.sputc(pod_uchar::from<char>('d'));
q.pubseekpos( ipos[1] );
q.sputc(pod_uchar::from<char>('e'));
VERIFY( my_filebuf::traits_type::eq(
my_filebuf::traits_type::to_char_type(q.sgetc()),
pod_uchar::from<char>('d')) );
}
int main()
{
test01();
return 0;
}
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