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

   1 // Copyright (C) 2004-2024 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 <cwchar> // for wcsncmp,...
  21 #include <istream>
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   const std::wstring str_02(L"soul eyes: john coltrane quartet");
  29
  30   std::wstringbuf isbuf_03(str_02, std::ios_base::in);
  31   std::wstringbuf isbuf_04(str_02, std::ios_base::in);
  32
  33   std::wistream is_00(0);
  34   std::wistream is_03(&isbuf_03);
  35   std::wistream is_04(&isbuf_04);
  36   std::ios_base::iostate state1, state2, statefail, stateeof;
  37   statefail = std::ios_base::failbit;
  38   stateeof = std::ios_base::eofbit;
  39
  40   // istream& read(char_type* s, streamsize n)
  41   wchar_t carray[60] = L"";
  42   state1 = is_04.rdstate();
  43   is_04.read(carray, 0);
  44   state2 = is_04.rdstate();
  45   VERIFY( state1 == state2 );
  46
  47   state1 = is_04.rdstate();
  48   is_04.read(carray, 9);
  49   state2 = is_04.rdstate();
  50   VERIFY( state1 == state2 );
  51   VERIFY( !std::wcsncmp(carray, L"soul eyes", 9) );
  52   VERIFY( is_04.peek() == L':' );
  53
  54   state1 = is_03.rdstate();
  55   is_03.read(carray, 60);
  56   state2 = is_03.rdstate();
  57   VERIFY( state1 != state2 );
  58   VERIFY( static_cast<bool>(state2 & stateeof) );
  59   VERIFY( static_cast<bool>(state2 & statefail) );
  60   VERIFY( !std::wcsncmp(carray, L"soul eyes: john coltrane quartet", 35) );
  61 }
  62
  63 int
  64 main()
  65 {
  66   test01();
  67   return 0;
  68 }