libstdc++-v3/testsuite/27_io/basic_istream/peek/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 // @require@ %-*.tst %-*.txt
  23 // @diff@ %-*.tst %-*.txt
  24
  25 #include <cstring> // for strncmp,...
  26 #include <istream>
  27 #include <sstream>
  28 #include <fstream>
  29 #include <testsuite_hooks.h>
  30
  31 void
  32 test01()
  33 {
  34   typedef std::ios::traits_type traits_type;
  35
  36   bool test __attribute__((unused)) = true;
  37   const std::string str_01;
  38   const std::string str_02("soul eyes: john coltrane quartet");
  39   std::string strtmp;
  40
  41   std::stringbuf isbuf_03(str_02, std::ios_base::in);
  42   std::stringbuf isbuf_04(str_02, std::ios_base::in);
  43
  44   std::istream is_00(NULL);
  45   std::istream is_03(&isbuf_03);
  46   std::istream is_04(&isbuf_04);
  47   std::ios_base::iostate state1, state2, statefail, stateeof;
  48   statefail = std::ios_base::failbit;
  49   stateeof = std::ios_base::eofbit;
  50
  51   char carray[60] = "";
  52
  53   // istream& ignore(streamsize n = 1, int_type delim = traits::eof())
  54   is_04.read(carray, 9);
  55   VERIFY( is_04.peek() == ':' );
  56
  57   state1 = is_04.rdstate();
  58   is_04.ignore();
  59   VERIFY( is_04.gcount() == 1 );
  60   state2 = is_04.rdstate();
  61   VERIFY( state1 == state2 );
  62   VERIFY( is_04.peek() == ' ' );
  63
  64   state1 = is_04.rdstate();
  65   is_04.ignore(0);
  66   VERIFY( is_04.gcount() == 0 );
  67   state2 = is_04.rdstate();
  68   VERIFY( state1 == state2 );
  69   VERIFY( is_04.peek() == ' ' );
  70
  71   state1 = is_04.rdstate();
  72   is_04.ignore(5, traits_type::to_int_type(' '));
  73   VERIFY( is_04.gcount() == 1 );
  74   state2 = is_04.rdstate();
  75   VERIFY( state1 == state2 );
  76   VERIFY( is_04.peek() == 'j' );
  77
  78   // int_type peek()
  79   state1 = is_04.rdstate();
  80   VERIFY( is_04.peek() == 'j' );
  81   VERIFY( is_04.gcount() == 0 );
  82   state2 = is_04.rdstate();
  83   VERIFY( state1 == state2 );
  84
  85   is_04.ignore(30);
  86   state1 = is_04.rdstate();
  87   VERIFY( is_04.peek() == traits_type::eof() );
  88   VERIFY( is_04.gcount() == 0 );
  89   state2 = is_04.rdstate();
  90   VERIFY( state1 != state2 );
  91 }
  92
  93 int
  94 main()
  95 {
  96   test01();
  97   return 0;
  98 }