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// 27.6.1.3 unformatted input functions 19 20// { dg-require-fileio "" } 21 22#include <istream> 23#include <string> 24#include <fstream> 25#include <limits> 26#include <cstdlib> 27#include <testsuite_hooks.h> 28 29using namespace std; 30 31string prepare(string::size_type len, unsigned nchunks, char delim) 32{ 33 string ret; 34 for (unsigned i = 0; i < nchunks; ++i) 35 { 36 for (string::size_type j = 0; j < len; ++j) 37 ret.push_back('a' + rand() % 26); 38 len *= 2; 39 ret.push_back(delim); 40 } 41 return ret; 42} 43 44void check(istream& stream, const string& str, unsigned nchunks, char delim) 45{ 46 bool test __attribute__((unused)) = true; 47 48 string::size_type index = 0, index_new = 0; 49 unsigned n = 0; 50 51 while (stream.ignore(numeric_limits<streamsize>::max(), delim).good()) 52 { 53 index_new = str.find(delim, index); 54 VERIFY( static_cast<string::size_type>(stream.gcount()) == 55 index_new - index + 1 ); 56 index = index_new + 1; 57 ++n; 58 } 59 VERIFY( stream.gcount() == 0 ); 60 VERIFY( !stream.fail() ); 61 VERIFY( n == nchunks ); 62} 63 64void test01() 65{ 66 const char filename[] = "istream_ignore.txt"; 67 68 const char delim = '|'; 69 const unsigned nchunks = 10; 70 const string data = prepare(555, nchunks, delim); 71 72 ofstream ofstrm; 73 ofstrm.open(filename); 74 ofstrm.write(data.data(), data.size()); 75 ofstrm.close(); 76 77 ifstream ifstrm; 78 ifstrm.open(filename); 79 check(ifstrm, data, nchunks, delim); 80 ifstrm.close(); 81} 82 83int main() 84{ 85 test01(); 86 return 0; 87} 88