libstdc++-v3/testsuite/27_io/basic_istream/putback/char/1.cc

   1 // 1999-08-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.6.1.3 unformatted input functions
  22
  23 #include <istream>
  24 #include <sstream>
  25 #include <testsuite_hooks.h>
  26
  27 void
  28 test01()
  29 {
  30   typedef std::ios::traits_type traits_type;
  31
  32   bool test __attribute__((unused)) = true;
  33   const std::string str_01;
  34   const std::string str_02("soul eyes: john coltrane quartet");
  35   std::string strtmp;
  36
  37   std::stringbuf isbuf_03(str_02, std::ios_base::in);
  38   std::stringbuf isbuf_04(str_02, std::ios_base::in);
  39   std::stringbuf isbuf_05(str_02, std::ios_base::in);
  40
  41   std::istream is_00(&isbuf_05);
  42   std::istream is_03(&isbuf_03);
  43   std::istream is_04(&isbuf_04);
  44   std::ios_base::iostate state1, state2, statefail, stateeof;
  45   statefail = std::ios_base::failbit;
  46   stateeof = std::ios_base::eofbit;
  47
  48   // istream& putback(char c)
  49   is_04.ignore(30);
  50   is_04.clear();
  51   state1 = is_04.rdstate();
  52   is_04.putback('|');
  53   VERIFY( is_04.gcount() == 0 );  // DR 60
  54   state2 = is_04.rdstate();
  55   VERIFY( state1 == state2 );
  56   VERIFY( is_04.peek() == '|' );
  57
  58   // istream& unget()
  59   is_04.clear();
  60   state1 = is_04.rdstate();
  61   is_04.unget();
  62   VERIFY( is_04.gcount() == 0 );  // DR 60
  63   state2 = is_04.rdstate();
  64   VERIFY( state1 == state2 );
  65   VERIFY( is_04.peek() == 'r' );
  66
  67   // int sync()
  68   is_00.ignore(10);
  69   int count1 = is_00.gcount();
  70   is_00.sync();
  71   int count2 = is_00.gcount();
  72   VERIFY (count1 == count2 );     // DR 60
  73 }
  74
  75 int
  76 main()
  77 {
  78   test01();
  79   return 0;
  80 }