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

   1 // Copyright (C) 2004-2019 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 // 27.6.1.3 unformatted input functions
  19
  20 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   typedef std::wios::traits_type traits_type;
  28
  29   const std::wstring str_01;
  30   const std::wstring str_02(L"soul eyes: john coltrane quartet");
  31   std::wstring strtmp;
  32
  33   std::wstringbuf isbuf_03(str_02, std::ios_base::in);
  34   std::wstringbuf isbuf_04(str_02, std::ios_base::in);
  35
  36   std::wistream is_00(0);
  37   std::wistream is_03(&isbuf_03);
  38   std::wistream is_04(&isbuf_04);
  39   std::ios_base::iostate state1, state2;
  40
  41   wchar_t carray[60] = L"";
  42
  43   // istream& ignore(streamsize n = 1, int_type delim = traits::eof())
  44   is_04.read(carray, 9);
  45   VERIFY( is_04.peek() == L':' );
  46
  47   state1 = is_04.rdstate();
  48   is_04.ignore();
  49   VERIFY( is_04.gcount() == 1 );
  50   state2 = is_04.rdstate();
  51   VERIFY( state1 == state2 );
  52   VERIFY( is_04.peek() == L' ' );
  53
  54   state1 = is_04.rdstate();
  55   is_04.ignore(0);
  56   VERIFY( is_04.gcount() == 0 );
  57   state2 = is_04.rdstate();
  58   VERIFY( state1 == state2 );
  59   VERIFY( is_04.peek() == L' ' );
  60
  61   state1 = is_04.rdstate();
  62   is_04.ignore(5, traits_type::to_int_type(' '));
  63   VERIFY( is_04.gcount() == 1 );
  64   state2 = is_04.rdstate();
  65   VERIFY( state1 == state2 );
  66   VERIFY( is_04.peek() == L'j' );
  67
  68   // int_type peek()
  69   state1 = is_04.rdstate();
  70   VERIFY( is_04.peek() == L'j' );
  71   VERIFY( is_04.gcount() == 0 );
  72   state2 = is_04.rdstate();
  73   VERIFY( state1 == state2 );
  74
  75   is_04.ignore(30);
  76   state1 = is_04.rdstate();
  77   VERIFY( is_04.peek() == traits_type::eof() );
  78   VERIFY( is_04.gcount() == 0 );
  79   state2 = is_04.rdstate();
  80   VERIFY( state1 != state2 );
  81 }
  82
  83 int
  84 main()
  85 {
  86   test01();
  87   return 0;
  88 }