libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/1.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 basic_istream::operator>>
  19
  20 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 // stringbufs.
  25 void test01()
  26 {
  27   typedef std::wios::traits_type ctraits_type;
  28
  29   bool test __attribute__((unused)) = true;
  30   const std::wstring str_01;
  31   const std::wstring str_02(L"art taylor kickin it on DAKAR");
  32   std::wstring strtmp;
  33
  34   std::wstringbuf isbuf_00(std::ios_base::in);
  35   std::wstringbuf isbuf_01(std::ios_base::in | std::ios_base::out);
  36   std::wstringbuf isbuf_02(str_01, std::ios_base::in);
  37   std::wstringbuf isbuf_03(str_01, std::ios_base::in | std::ios_base::out);
  38   std::wstringbuf isbuf_04(str_02, std::ios_base::in);
  39   std::wstringbuf isbuf_05(str_02, std::ios_base::in | std::ios_base::out);
  40
  41   std::wistream is_00(0);
  42   std::wistream is_01(&isbuf_01);
  43   std::wistream is_02(&isbuf_02);
  44   std::wistream is_03(&isbuf_03);
  45   std::wistream is_04(&isbuf_04);
  46   std::wistream is_05(&isbuf_05);
  47   std::ios_base::iostate state1, state2, statefail, stateeof;
  48   statefail = std::ios_base::failbit;
  49   stateeof = std::ios_base::eofbit;
  50
  51
  52   // template<_CharT, _Traits>
  53   //  basic_istream& operator>>(basic_streambuf*)
  54
  55   // null istream to empty in_buf
  56   state1 = is_00.rdstate();
  57   is_00 >> &isbuf_00;
  58   state2 = is_00.rdstate();
  59   VERIFY( state1 != state2 );
  60   VERIFY( static_cast<bool>(state2 & statefail) );
  61   VERIFY( isbuf_00.str() == str_01 );
  62
  63   // null istream to empty in_out_buf
  64   is_00.clear(std::ios_base::goodbit);
  65   state1 = is_00.rdstate();
  66   is_00 >> &isbuf_01;
  67   state2 = is_00.rdstate();
  68   VERIFY( state1 != state2 );
  69   VERIFY( static_cast<bool>(state2 & statefail) );
  70   VERIFY( isbuf_01.str() == str_01 );
  71
  72   // null istream to full in_buf
  73   is_00.clear(std::ios_base::goodbit);
  74   state1 = is_00.rdstate();
  75   is_00 >> &isbuf_04;
  76   state2 = is_00.rdstate();
  77   VERIFY( state1 != state2 );
  78   VERIFY( static_cast<bool>(state2 & statefail) );
  79   VERIFY( isbuf_04.str() == str_02 );
  80
  81   // null istream to full in_out_buf
  82   is_00.clear(std::ios_base::goodbit);
  83   state1 = is_00.rdstate();
  84   is_00 >> &isbuf_05;
  85   state2 = is_00.rdstate();
  86   VERIFY( state1 != state2 );
  87   VERIFY( static_cast<bool>(state2 & statefail) );
  88   VERIFY( isbuf_05.str() == str_02 );
  89
  90   // empty but non-null istream to full in_buf
  91   state1 = is_02.rdstate();
  92   is_02 >> &isbuf_04;
  93   state2 = is_02.rdstate();
  94   VERIFY( state1 != state2 );
  95   VERIFY( static_cast<bool>(state2 & statefail) );
  96   VERIFY( isbuf_04.str() == str_02 ); // as only an "in" buffer
  97   VERIFY( isbuf_04.sgetc() == L'a' );
  98
  99   // empty but non-null istream to full in_out_buf
 100   is_02.clear(std::ios_base::goodbit);
 101   state1 = is_02.rdstate();
 102   is_02 >> &isbuf_05;
 103   state2 = is_02.rdstate();
 104   VERIFY( state1 != state2 );
 105   VERIFY( static_cast<bool>(state2 & statefail) );
 106   VERIFY( isbuf_05.str() == str_02 ); // as only an "in" buffer
 107   VERIFY( isbuf_05.sgetc() == L'a' );
 108
 109   // full istream to empty in_buf (need out_buf, you know?)
 110   state1 = is_04.rdstate();
 111   is_04 >> &isbuf_02;
 112   state2 = is_04.rdstate();
 113   VERIFY( state1 != state2 );
 114   VERIFY( static_cast<bool>(state2 & statefail) );
 115   VERIFY( isbuf_02.str() == str_01 ); // as only an "in" buffer
 116   VERIFY( isbuf_02.sgetc() == ctraits_type::eof() );
 117   VERIFY( is_04.peek() == ctraits_type::eof() ); // as failed
 118
 119   // full istream to empty in_out_buf
 120   is_04.clear(std::ios_base::goodbit);
 121   state1 = is_04.rdstate();
 122   is_04 >> &isbuf_03;
 123   state2 = is_04.rdstate();
 124   VERIFY( state1 != state2 );
 125   VERIFY( !static_cast<bool>(state2 & statefail) );
 126   VERIFY( state2 == stateeof );
 127   strtmp = isbuf_03.str();
 128   VERIFY( strtmp == str_02 ); // as only an "in" buffer
 129   VERIFY( isbuf_03.sgetc() == L'a' );
 130   VERIFY( is_04.peek() == ctraits_type::eof() );
 131 }
 132
 133 int main()
 134 {
 135   test01();
 136   return 0;
 137 }