libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/char/3.cc

   1 // 1999-07-26 bkoz
   2
   3 // Copyright (C) 1999, 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 // 27.6.1.2.3 character extractors
  22
  23 #include <istream>
  24 #include <sstream>
  25 #include <testsuite_hooks.h>
  26
  27 void test01()
  28 {
  29   bool test __attribute__((unused)) = true;
  30   std::string str_01;
  31   const std::string str_02("coltrane playing 'softly as a morning sunrise'");
  32   const std::string str_03("coltrane");
  33
  34   std::stringbuf isbuf_01(std::ios_base::in);
  35   std::stringbuf isbuf_02(str_02, std::ios_base::in);
  36   std::istream is_01(NULL);
  37   std::istream is_02(&isbuf_02);
  38
  39   std::ios_base::iostate state1, state2, statefail;
  40   statefail = std::ios_base::failbit;
  41
  42   // template<_CharT, _Traits>
  43   //  basic_istream& operator>>(istream&, _CharT*)
  44   int n = 20;
  45   char array1[n];
  46   typedef std::ios::traits_type ctraits_type;
  47
  48   // testing with width() control enabled.
  49   is_02.width(8);
  50   state1 = is_02.rdstate();
  51   is_02 >> array1;   // should snake "coltran"
  52   state2 = is_02.rdstate();
  53   VERIFY( state1 == state2 );
  54   VERIFY( !ctraits_type::compare(array1, "coltran", 7) );
  55
  56   is_02.width(1);
  57   state1 = is_02.rdstate();
  58   is_02 >> array1;   // should snake nothing, set failbit
  59   state2 = is_02.rdstate();
  60   VERIFY( state1 != state2 );
  61   VERIFY( state2 == statefail );
  62   VERIFY( array1[0] == '\0' );
  63
  64   is_02.width(8);
  65   is_02.clear();
  66   state1 = is_02.rdstate();
  67   VERIFY( !state1 );
  68   is_02 >> array1;   // should snake "e"
  69   state2 = is_02.rdstate();
  70   VERIFY( state1 == state2 );
  71   VERIFY( !ctraits_type::compare(array1, "e", 1) );
  72
  73   // testing for correct exception setting
  74   const std::string str_04("   impulse!!");
  75   std::stringbuf isbuf_03(str_04, std::ios_base::in);
  76   std::stringbuf isbuf_04(str_04, std::ios_base::in);
  77   std::istream is_03(&isbuf_03);
  78   std::istream is_04(&isbuf_04);
  79
  80   is_03 >> array1;
  81   VERIFY( !ctraits_type::compare(array1,"impulse!!", 10) );
  82   VERIFY( is_03.rdstate() == std::ios_base::eofbit );
  83
  84   is_04.width(9);
  85   is_04 >> array1;
  86   VERIFY( ! std::ios::traits_type::compare(array1,"impulse!", 9) );
  87   VERIFY( !is_04.rdstate() );
  88 }
  89
  90 int main()
  91 {
  92   test01();
  93   return 0;
  94 }