1// Copyright (C) 2004, 2005, 2006, 2007, 2009 Free Software Foundation 2// 3// This file is part of the GNU ISO C++ Library. This library is free 4// software; you can redistribute it and/or modify it under the 5// terms of the GNU General Public License as published by the 6// Free Software Foundation; either version 3, or (at your option) 7// any later version. 8 9// This library is distributed in the hope that it will be useful, 10// but WITHOUT ANY WARRANTY; without even the implied warranty of 11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12// GNU General Public License for more details. 13 14// You should have received a copy of the GNU General Public License along 15// with this library; see the file COPYING3. If not see 16// <http://www.gnu.org/licenses/>. 17 18// 21.3.7.9 inserters and extractors 19 20// { dg-require-fileio "" } 21 22#include <istream> 23#include <string> 24#include <fstream> 25#include <cstdlib> 26#include <testsuite_hooks.h> 27 28using namespace std; 29 30string prepare(string::size_type len, unsigned nchunks) 31{ 32 string ret; 33 for (unsigned i = 0; i < nchunks; ++i) 34 { 35 for (string::size_type j = 0; j < len; ++j) 36 ret.push_back('a' + rand() % 26); 37 len *= 2; 38 ret.push_back(' '); 39 } 40 return ret; 41} 42 43void check(istream& stream, const string& str, unsigned nchunks) 44{ 45 bool test __attribute__((unused)) = true; 46 47 string chunk; 48 string::size_type index = 0, index_new = 0; 49 unsigned n = 0; 50 51 while (stream >> chunk) 52 { 53 index_new = str.find(' ', index); 54 VERIFY( !str.compare(index, index_new - index, chunk) ); 55 index = index_new + 1; 56 ++n; 57 } 58 VERIFY( stream.eof() ); 59 VERIFY( n == nchunks ); 60} 61 62// istream& operator>>(istream&, string&) 63void test01() 64{ 65 const char filename[] = "inserters_extractors-3.txt"; 66 67 const unsigned nchunks = 10; 68 const string data = prepare(666, nchunks); 69 70 ofstream ofstrm; 71 ofstrm.open(filename); 72 ofstrm.write(data.data(), data.size()); 73 ofstrm.close(); 74 75 ifstream ifstrm; 76 ifstrm.open(filename); 77 check(ifstrm, data, nchunks); 78 ifstrm.close(); 79} 80 81int main() 82{ 83 test01(); 84 return 0; 85} 86