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// { dg-require-fileio "" }
// Copyright (C) 2010-2019 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 <cstring>
#include <testsuite_hooks.h>
void test01()
{
using namespace std;
typedef wfilebuf::pos_type pos_type;
const char name[] = "tmp_seekoff-4.tst";
const size_t size = 12;
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) );
// Check read => write without 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"gh", 2);
VERIFY( n == 2 );
// Check write => read without pubseekoff(0, ios_base::cur)
n = fb.sgetn( buf, 3 );
VERIFY( !memcmp(buf, L"cef", 3) );
n = fb.sputn(L"ijkl", 4);
VERIFY( n == 4 );
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 == 12 );
VERIFY( !wmemcmp(buf, L"ghcefijklmno", 12) );
fb.close();
}
int main()
{
test01();
return 0;
}
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