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

   1 // 1999-08-11 bkoz
   2
   3 // Copyright (C) 1999-2023 Free Software Foundation, Inc.
   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 3, 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 COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.6.1.3 unformatted input functions
  21
  22 #include <istream>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 void
  27 test01()
  28 {
  29   typedef std::ios::traits_type traits_type;
  30
  31   const std::string str_01;
  32   const std::string str_02("soul eyes: john coltrane quartet");
  33   std::string strtmp;
  34
  35   std::stringbuf isbuf_03(str_02, std::ios_base::in);
  36   std::stringbuf isbuf_04(str_02, std::ios_base::in);
  37
  38   std::istream is_00(0);
  39   std::istream is_03(&isbuf_03);
  40   std::istream is_04(&isbuf_04);
  41   std::ios_base::iostate state1, state2;
  42
  43   // istream& read(char_type* s, streamsize n)
  44   char carray[60] = "";
  45   is_04.read(carray, 9);
  46   VERIFY( is_04.peek() == ':' );
  47
  48   // istream& ignore(streamsize n = 1, int_type delim = traits::eof())
  49   state1 = is_04.rdstate();
  50   is_04.ignore();
  51   VERIFY( is_04.gcount() == 1 );
  52   state2 = is_04.rdstate();
  53   VERIFY( state1 == state2 );
  54   VERIFY( is_04.peek() == ' ' );
  55
  56   state1 = is_04.rdstate();
  57   is_04.ignore(0);
  58   VERIFY( is_04.gcount() == 0 );
  59   state2 = is_04.rdstate();
  60   VERIFY( state1 == state2 );
  61   VERIFY( is_04.peek() == ' ' );
  62
  63   state1 = is_04.rdstate();
  64   is_04.ignore(5, traits_type::to_int_type(' '));
  65   VERIFY( is_04.gcount() == 1 );
  66   state2 = is_04.rdstate();
  67   VERIFY( state1 == state2 );
  68   VERIFY( is_04.peek() == 'j' );
  69 }
  70
  71 int
  72 main()
  73 {
  74   test01();
  75   return 0;
  76 }