libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/11.cc

   1 // Copyright (C) 2004-2017 Free Software Foundation, Inc.
   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-options "-DMAX_SIZE=466" { target simulator } }
  21
  22 #ifndef MAX_SIZE
  23 #define MAX_SIZE 666
  24 #endif
  25
  26 #include <istream>
  27 #include <string>
  28 #include <fstream>
  29 #include <cstdlib>
  30 #include <testsuite_hooks.h>
  31
  32 using namespace std;
  33
  34 wstring prepare(wstring::size_type len, unsigned nchunks)
  35 {
  36   wstring ret;
  37   for (unsigned i = 0; i < nchunks; ++i)
  38     {
  39       for (wstring::size_type j = 0; j < len; ++j)
  40         ret.push_back(L'a' + rand() % 26);
  41       len *= 2;
  42       ret.push_back(L' ');
  43     }
  44   return ret;
  45 }
  46
  47 void check(wistream& stream, const wstring& str, unsigned nchunks)
  48 {
  49   wstring chunk;
  50   wstring::size_type index = 0, index_new = 0;
  51   unsigned n = 0;
  52
  53   while (stream >> chunk)
  54     {
  55       index_new = str.find(L' ', index);
  56       VERIFY( !str.compare(index, index_new - index, chunk) );
  57       index = index_new + 1;
  58       ++n;
  59     }
  60   VERIFY( stream.eof() );
  61   VERIFY( n == nchunks );
  62 }
  63
  64 // istream& operator>>(istream&, string&)
  65 void test01()
  66 {
  67   const char filename[] = "inserters_extractors-3.txt";
  68
  69   const unsigned nchunks = 10;
  70   const wstring data = prepare(MAX_SIZE, nchunks);
  71
  72   wofstream ofstrm;
  73   ofstrm.open(filename);
  74   ofstrm.write(data.data(), data.size());
  75   ofstrm.close();
  76
  77   wifstream ifstrm;
  78   ifstrm.open(filename);
  79   check(ifstrm, data, nchunks);
  80   ifstrm.close();
  81 }
  82
  83 int main()
  84 {
  85   test01();
  86   return 0;
  87 }