libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/1.cc

   1 // Copyright (C) 2004, 2005, 2009, 2010 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 // 27.6.1.2.3 character extractors
  19
  20 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 void test01()
  25 {
  26   bool test __attribute__((unused)) = true;
  27   std::wstring str_01;
  28   const std::wstring str_02(L"coltrane playing 'softly as a morning sunrise'");
  29   const std::wstring str_03(L"coltrane");
  30
  31   std::wstringbuf isbuf_01(std::ios_base::in);
  32   std::wstringbuf isbuf_02(str_02, std::ios_base::in);
  33   std::wistream is_01(0);
  34   std::wistream is_02(&isbuf_02);
  35
  36   std::ios_base::iostate state1, state2, statefail;
  37   statefail = std::ios_base::failbit;
  38
  39   // template<_CharT, _Traits>
  40   //  basic_istream& operator>>(istream&, _CharT*)
  41   const int n = 20;
  42   wchar_t array1[n];
  43   array1[0] = L'\0';
  44   typedef std::wios::traits_type ctraits_type;
  45   ctraits_type::int_type i1, i2;
  46
  47   state1 = is_01.rdstate();
  48   i1 = ctraits_type::length(array1);
  49   is_01 >> array1;   // should snake 0 characters, not alter stream state
  50   i2 = ctraits_type::length(array1);
  51   state2 = is_01.rdstate();
  52   VERIFY( i1 == i2 );
  53   VERIFY( state1 != state2 );
  54   VERIFY( static_cast<bool>(state2 & statefail) );
  55
  56   state1 = is_02.rdstate();
  57   is_02 >> array1;   // should snake L"coltrane"
  58   state2 = is_02.rdstate();
  59   VERIFY( state1 == state2 );
  60   VERIFY( !static_cast<bool>(state2 & statefail) );
  61   VERIFY( array1[str_03.size() - 1] == L'e' );
  62   array1[str_03.size()] = L'\0';
  63   VERIFY( !str_03.compare(0, str_03.size(), array1) );
  64   std::wistream::int_type int1 = is_02.peek(); // should be L' '
  65   VERIFY( int1 == L' ' );
  66
  67   state1 = is_02.rdstate();
  68   is_02 >> array1;   // should snake L"playing" as sentry "eats" ws
  69   state2 = is_02.rdstate();
  70   int1 = is_02.peek(); // should be L' '
  71   VERIFY( int1 == L' ' );
  72   VERIFY( state1 == state2 );
  73   VERIFY( !static_cast<bool>(state2 & statefail) );
  74 }
  75
  76 int main()
  77 {
  78   test01();
  79   return 0;
  80 }