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

   1 // 1999-08-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 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 <cstring> // for strncmp,...
  24 #include <istream>
  25 #include <sstream>
  26 #include <testsuite_hooks.h>
  27
  28 void
  29 test01()
  30 {
  31   bool test __attribute__((unused)) = true;
  32   const std::string str_02("soul eyes: john coltrane quartet");
  33
  34   std::stringbuf isbuf_03(str_02, std::ios_base::in);
  35   std::stringbuf isbuf_04(str_02, std::ios_base::in);
  36
  37   std::istream is_00(NULL);
  38   std::istream is_03(&isbuf_03);
  39   std::istream is_04(&isbuf_04);
  40   std::ios_base::iostate state1, state2, statefail, stateeof;
  41   statefail = std::ios_base::failbit;
  42   stateeof = std::ios_base::eofbit;
  43
  44   // istream& read(char_type* s, streamsize n)
  45   char carray[60] = "";
  46   state1 = is_04.rdstate();
  47   is_04.read(carray, 0);
  48   state2 = is_04.rdstate();
  49   VERIFY( state1 == state2 );
  50
  51   state1 = is_04.rdstate();
  52   is_04.read(carray, 9);
  53   state2 = is_04.rdstate();
  54   VERIFY( state1 == state2 );
  55   VERIFY( !std::strncmp(carray, "soul eyes", 9) );
  56   VERIFY( is_04.peek() == ':' );
  57
  58   state1 = is_03.rdstate();
  59   is_03.read(carray, 60);
  60   state2 = is_03.rdstate();
  61   VERIFY( state1 != state2 );
  62   VERIFY( static_cast<bool>(state2 & stateeof) );
  63   VERIFY( static_cast<bool>(state2 & statefail) );
  64   VERIFY( !std::strncmp(carray, "soul eyes: john coltrane quartet", 35) );
  65 }
  66
  67 int
  68 main()
  69 {
  70   test01();
  71   return 0;
  72 }