libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/3.cc

   1 // Copyright (C) 2004-2014 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 // 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   int n = 20;
  42   wchar_t array1[n];
  43   typedef std::wios::traits_type ctraits_type;
  44
  45   // testing with width() control enabled.
  46   is_02.width(8);
  47   state1 = is_02.rdstate();
  48   is_02 >> array1;   // should snake L"coltran"
  49   state2 = is_02.rdstate();
  50   VERIFY( state1 == state2 );
  51   VERIFY( !ctraits_type::compare(array1, L"coltran", 7) );
  52
  53   is_02.width(1);
  54   state1 = is_02.rdstate();
  55   is_02 >> array1;   // should snake nothing, set failbit
  56   state2 = is_02.rdstate();
  57   VERIFY( state1 != state2 );
  58   VERIFY( state2 == statefail );
  59   VERIFY( array1[0] == L'\0' );
  60
  61   is_02.width(8);
  62   is_02.clear();
  63   state1 = is_02.rdstate();
  64   VERIFY( !state1 );
  65   is_02 >> array1;   // should snake L"e"
  66   state2 = is_02.rdstate();
  67   VERIFY( state1 == state2 );
  68   VERIFY( !ctraits_type::compare(array1, L"e", 1) );
  69
  70   // testing for correct exception setting
  71   const std::wstring str_04(L"   impulse!!");
  72   std::wstringbuf isbuf_03(str_04, std::ios_base::in);
  73   std::wstringbuf isbuf_04(str_04, std::ios_base::in);
  74   std::wistream is_03(&isbuf_03);
  75   std::wistream is_04(&isbuf_04);
  76
  77   is_03 >> array1;
  78   VERIFY( !ctraits_type::compare(array1, L"impulse!!", 10) );
  79   VERIFY( is_03.rdstate() == std::ios_base::eofbit );
  80
  81   is_04.width(9);
  82   is_04 >> array1;
  83   VERIFY( !ctraits_type::compare(array1, L"impulse!", 9) );
  84   VERIFY( !is_04.rdstate() );
  85 }
  86
  87 int main()
  88 {
  89   test01();
  90   return 0;
  91 }