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// Copyright (C) 2004-2016 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/>.
// 27.6.1.3 unformatted input functions
// { dg-require-fileio "" }
#include <istream>
#include <string>
#include <fstream>
#include <limits>
#include <cstdlib>
#include <testsuite_hooks.h>
using namespace std;
string prepare(string::size_type len, unsigned nchunks, char delim)
{
string ret;
for (unsigned i = 0; i < nchunks; ++i)
{
for (string::size_type j = 0; j < len; ++j)
ret.push_back('a' + rand() % 26);
len *= 2;
ret.push_back(delim);
}
return ret;
}
void check(istream& stream, const string& str, unsigned nchunks, char delim)
{
bool test __attribute__((unused)) = true;
string::size_type index = 0, index_new = 0;
unsigned n = 0;
while (stream.ignore(numeric_limits<streamsize>::max(), delim).good())
{
index_new = str.find(delim, index);
VERIFY( static_cast<string::size_type>(stream.gcount()) ==
index_new - index + 1 );
index = index_new + 1;
++n;
}
VERIFY( stream.gcount() == 0 );
VERIFY( !stream.fail() );
VERIFY( n == nchunks );
}
void test01()
{
const char filename[] = "istream_ignore.txt";
const char delim = '|';
const unsigned nchunks = 10;
const string data = prepare(555, nchunks, delim);
ofstream ofstrm;
ofstrm.open(filename);
ofstrm.write(data.data(), data.size());
ofstrm.close();
ifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data, nchunks, delim);
ifstrm.close();
}
int main()
{
test01();
return 0;
}
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