1// Copyright (C) 2004 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 2, 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 COPYING. If not, write to the Free 16// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 17// USA. 18 19// 21.3.7.9 inserters and extractors 20 21#include <istream> 22#include <string> 23#include <fstream> 24#include <testsuite_hooks.h> 25 26using namespace std; 27 28wstring prepare(wstring::size_type len, unsigned nchunks) 29{ 30 wstring ret; 31 for (unsigned i = 0; i < nchunks; ++i) 32 { 33 for (wstring::size_type j = 0; j < len; ++j) 34 ret.push_back(L'a' + rand() % 26); 35 len *= 2; 36 ret.push_back(L' '); 37 } 38 return ret; 39} 40 41void check(wistream& stream, const wstring& str, unsigned nchunks) 42{ 43 bool test __attribute__((unused)) = true; 44 45 wstring chunk; 46 wstring::size_type index = 0, index_new = 0; 47 unsigned n = 0; 48 49 while (stream >> chunk) 50 { 51 index_new = str.find(L' ', index); 52 VERIFY( !str.compare(index, index_new - index, chunk) ); 53 index = index_new + 1; 54 ++n; 55 } 56 VERIFY( stream.eof() ); 57 VERIFY( n == nchunks ); 58} 59 60// istream& operator>>(istream&, string&) 61void test01() 62{ 63 const char filename[] = "inserters_extractors-3.txt"; 64 65 const unsigned nchunks = 10; 66 const wstring data = prepare(666, nchunks); 67 68 wofstream ofstrm; 69 ofstrm.open(filename); 70 ofstrm.write(data.data(), data.size()); 71 ofstrm.close(); 72 73 wifstream ifstrm; 74 ifstrm.open(filename); 75 check(ifstrm, data, nchunks); 76 ifstrm.close(); 77} 78 79int main() 80{ 81 test01(); 82 return 0; 83} 84