old-autovect-branch/libstdc++-v3/testsuite/27_io/basic_istream/getline/wchar_t/2.cc

   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 // 27.6.1.3 unformatted input functions
  20
  21 #include <cwchar> // for wcslen
  22 #include <istream>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 // [patch] bits/istream.tcc - getline(char_type*,streamsize,char_type)
  27 // http://gcc.gnu.org/ml/libstdc++/2000-07/msg00003.html
  28 void
  29 test05()
  30 {
  31   const wchar_t* charray = L"\n"
  32 L"a\n"
  33 L"aa\n"
  34 L"aaa\n"
  35 L"aaaa\n"
  36 L"aaaaa\n"
  37 L"aaaaaa\n"
  38 L"aaaaaaa\n"
  39 L"aaaaaaaa\n"
  40 L"aaaaaaaaa\n"
  41 L"aaaaaaaaaa\n"
  42 L"aaaaaaaaaaa\n"
  43 L"aaaaaaaaaaaa\n"
  44 L"aaaaaaaaaaaaa\n"
  45 L"aaaaaaaaaaaaaa\n";
  46
  47   bool test __attribute__((unused)) = true;
  48   const std::streamsize it = 5;
  49   std::streamsize br = 0;
  50   wchar_t tmp[it];
  51   std::wstringbuf sb(charray, std::ios_base::in);
  52   std::wistream ifs(&sb);
  53   std::streamsize blen = std::wcslen(charray);
  54   VERIFY(!(!ifs));
  55   while(ifs.getline(tmp, it) || ifs.gcount())
  56     {
  57       br += ifs.gcount();
  58       if(ifs.eof())
  59         {
  60           // Just sanity checks to make sure we've extracted the same
  61           // number of chars that were in the streambuf
  62           VERIFY( br == blen );
  63           // Also, we should only set the failbit if we could
  64           // _extract_ no chars from the stream, i.e. the first read
  65           // returned EOF.
  66           VERIFY( ifs.fail() && ifs.gcount() == 0 );
  67         }
  68       else if(ifs.fail())
  69         {
  70           // delimiter not read
  71           //
  72           // either
  73           // -> extracted no characters
  74           // or
  75           // -> n - 1 characters are stored
  76           ifs.clear(ifs.rdstate() & ~std::ios::failbit);
  77           VERIFY( (ifs.gcount() == 0) || (std::wcslen(tmp) == it - 1) );
  78           VERIFY( !(!ifs) );
  79           continue;
  80         }
  81       else
  82         {
  83           // delimiter was read.
  84           //
  85           // -> wcslen(__s) < n - 1
  86           // -> delimiter was seen -> gcount() > wcslen(__s)
  87           VERIFY( ifs.gcount() == static_cast<std::streamsize>(std::wcslen(tmp)
  88                                                                + 1) );
  89           continue;
  90         }
  91     }
  92 }
  93
  94 int
  95 main()
  96 {
  97   test05();
  98   return 0;
  99 }