libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/10.cc

   1 // Copyright (C) 2004-2020 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=505" { target simulator } }
  21 // { dg-require-fileio "" }
  22
  23 #ifndef MAX_SIZE
  24 #define MAX_SIZE 777
  25 #endif
  26
  27 #include <istream>
  28 #include <string>
  29 #include <fstream>
  30 #include <cstdlib>
  31 #include <testsuite_hooks.h>
  32
  33 using namespace std;
  34
  35 wstring prepare(wstring::size_type len, unsigned nchunks, wchar_t delim)
  36 {
  37   wstring ret;
  38   for (unsigned i = 0; i < nchunks; ++i)
  39     {
  40       for (wstring::size_type j = 0; j < len; ++j)
  41         ret.push_back(L'a' + rand() % 26);
  42       len *= 2;
  43       ret.push_back(delim);
  44     }
  45   return ret;
  46 }
  47
  48 void check(wistream& stream, const wstring& str, unsigned nchunks, wchar_t delim)
  49 {
  50   wstring chunk;
  51   wstring::size_type index = 0, index_new = 0;
  52   unsigned n = 0;
  53
  54   while (getline(stream, chunk, delim))
  55     {
  56       index_new = str.find(delim, index);
  57       VERIFY( !str.compare(index, index_new - index, chunk) );
  58       index = index_new + 1;
  59       ++n;
  60     }
  61   VERIFY( stream.eof() );
  62   VERIFY( n == nchunks );
  63 }
  64
  65 // istream& getline(istream&, string&, char)
  66 void test01()
  67 {
  68   const char filename[] = "inserters_extractors-2.txt";
  69
  70   const wchar_t delim = L'|';
  71   const unsigned nchunks = 10;
  72   const wstring data = prepare(MAX_SIZE, nchunks, delim);
  73
  74   wofstream ofstrm;
  75   ofstrm.open(filename);
  76   ofstrm.write(data.data(), data.size());
  77   ofstrm.close();
  78
  79   wifstream ifstrm;
  80   ifstrm.open(filename);
  81   check(ifstrm, data, nchunks, delim);
  82   ifstrm.close();
  83 }
  84
  85 int main()
  86 {
  87   test01();
  88   return 0;
  89 }