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

   1 // 1999-07-26 bkoz
   2
   3 // Copyright (C) 1999-2013 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 // 27.6.1.2.3 character extractors
  21
  22 #include <istream>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   bool test __attribute__((unused)) = true;
  29   std::string str_01;
  30   const std::string str_02("coltrane playing 'softly as a morning sunrise'");
  31   const std::string str_03("coltrane");
  32
  33   std::stringbuf isbuf_01(std::ios_base::in);
  34   std::stringbuf isbuf_02(str_02, std::ios_base::in);
  35   std::istream is_01(0);
  36   std::istream is_02(&isbuf_02);
  37
  38   std::ios_base::iostate state1, state2, statefail;
  39   statefail = std::ios_base::failbit;
  40
  41   // template<_CharT, _Traits>
  42   //  basic_istream& operator>>(istream&, _CharT*)
  43   const int n = 20;
  44   char array1[n];
  45   array1[0] = '\0';
  46   typedef std::ios::traits_type ctraits_type;
  47   ctraits_type::int_type i1, i2;
  48
  49   state1 = is_01.rdstate();
  50   i1 = ctraits_type::length(array1);
  51   is_01 >> array1;   // should snake 0 characters, not alter stream state
  52   i2 = ctraits_type::length(array1);
  53   state2 = is_01.rdstate();
  54   VERIFY( i1 == i2 );
  55   VERIFY( state1 != state2 );
  56   VERIFY( static_cast<bool>(state2 & statefail) );
  57
  58   state1 = is_02.rdstate();
  59   is_02 >> array1;   // should snake "coltrane"
  60   state2 = is_02.rdstate();
  61   VERIFY( state1 == state2 );
  62   VERIFY( !static_cast<bool>(state2 & statefail) );
  63   VERIFY( array1[str_03.size() - 1] == 'e' );
  64   array1[str_03.size()] = '\0';
  65   VERIFY( !str_03.compare(0, str_03.size(), array1) );
  66   std::istream::int_type int1 = is_02.peek(); // should be ' '
  67   VERIFY( int1 == ' ' );
  68
  69   state1 = is_02.rdstate();
  70   is_02 >> array1;   // should snake "playing" as sentry "eats" ws
  71   state2 = is_02.rdstate();
  72   int1 = is_02.peek(); // should be ' '
  73   VERIFY( int1 == ' ' );
  74   VERIFY( state1 == state2 );
  75   VERIFY( !static_cast<bool>(state2 & statefail) );
  76
  77   // template<_CharT, _Traits>
  78   //  basic_istream& operator>>(istream&, unsigned char*)
  79   unsigned char array2[n];
  80   state1 = is_02.rdstate();
  81   is_02 >> array2;   // should snake 'softly
  82   state2 = is_02.rdstate();
  83   VERIFY( state1 == state2 );
  84   VERIFY( !static_cast<bool>(state2 & statefail) );
  85   VERIFY( array2[0] == '\'' );
  86   VERIFY( array2[1] == 's' );
  87   VERIFY( array2[6] == 'y' );
  88   int1 = is_02.peek(); // should be ' '
  89   VERIFY( int1 == ' ' );
  90
  91   // template<_CharT, _Traits>
  92   //  basic_istream& operator>>(istream&, signed char*)
  93   signed char array3[n];
  94   state1 = is_02.rdstate();
  95   is_02 >> array3;   // should snake "as"
  96   state2 = is_02.rdstate();
  97   VERIFY( state1 == state2 );
  98   VERIFY( !static_cast<bool>(state2 & statefail) );
  99   VERIFY( array3[0] == 'a' );
 100   VERIFY( array3[1] == 's' );
 101   int1 = is_02.peek(); // should be ' '
 102   VERIFY( int1 == ' ' );
 103 }
 104
 105 int main()
 106 {
 107   test01();
 108   return 0;
 109 }