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

   1 // Copyright (C) 2004, 2009 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 // 27.6.1.3 unformatted input functions
  19 // @require@ %-*.tst %-*.txt
  20 // @diff@ %-*.tst %-*.txt
  21
  22 #include <istream>
  23 #include <fstream>
  24 #include <limits>
  25 #include <testsuite_hooks.h>
  26
  27 // istream& ignore(streamsize n)
  28 void
  29 test01()
  30 {
  31   using namespace std;
  32   bool test __attribute__((unused)) = true;
  33
  34   const char filename[] ="istream_unformatted-1.txt";
  35   ios_base::iostate state1, state2;
  36
  37   wifstream ifstrm;
  38   ifstrm.open(filename);
  39
  40   state1 = ifstrm.rdstate();
  41   VERIFY( state1 == ios_base::goodbit );
  42   VERIFY( ifstrm.peek() == L'1' );
  43   state2 = ifstrm.rdstate();
  44   VERIFY( state1 == state2 );
  45
  46   state1 = ifstrm.rdstate();
  47   ifstrm.ignore(1);
  48   VERIFY( ifstrm.gcount() == 1 );
  49   state2 = ifstrm.rdstate();
  50   VERIFY( state1 == state2 );
  51   VERIFY( ifstrm.peek() == L'2' );
  52
  53   state1 = ifstrm.rdstate();
  54   ifstrm.ignore(10);
  55   VERIFY( ifstrm.gcount() == 10 );
  56   state2 = ifstrm.rdstate();
  57   VERIFY( state1 == state2 );
  58   VERIFY( ifstrm.peek() == L'1' );
  59
  60   state1 = ifstrm.rdstate();
  61   ifstrm.ignore(100);
  62   VERIFY( ifstrm.gcount() == 100 );
  63   state2 = ifstrm.rdstate();
  64   VERIFY( state1 == state2 );
  65   VERIFY( ifstrm.peek() == L'2' );
  66
  67   state1 = ifstrm.rdstate();
  68   ifstrm.ignore(1000);
  69   VERIFY( ifstrm.gcount() == 1000 );
  70   state2 = ifstrm.rdstate();
  71   VERIFY( state1 == state2 );
  72   VERIFY( ifstrm.peek() == L'1' );
  73
  74   state1 = ifstrm.rdstate();
  75   ifstrm.ignore(10000);
  76   VERIFY( ifstrm.gcount() == 10000 );
  77   state2 = ifstrm.rdstate();
  78   VERIFY( state1 == state2 );
  79   VERIFY( ifstrm.peek() == L'2' );
  80
  81   state1 = ifstrm.rdstate();
  82   ifstrm.ignore(numeric_limits<streamsize>::max());
  83   VERIFY( ifstrm.gcount() == 5389 );
  84   state2 = ifstrm.rdstate();
  85   VERIFY( state1 != state2 );
  86   VERIFY( state2 == ios_base::eofbit );
  87 }
  88
  89 int
  90 main()
  91 {
  92   test01();
  93   return 0;
  94 }