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

   1 // 1999-07-26 bkoz
   2
   3 // Copyright (C) 1999-2020 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   std::string str_01;
  29   const std::string str_02("coltrane playing 'softly as a morning sunrise'");
  30   const std::string str_03("coltrane");
  31
  32   std::stringbuf isbuf_01(std::ios_base::in);
  33   std::stringbuf isbuf_02(str_02, std::ios_base::in);
  34   std::istream is_01(0);
  35   std::istream is_02(&isbuf_02);
  36
  37   std::ios_base::iostate state1, state2, statefail;
  38   statefail = std::ios_base::failbit;
  39
  40   // template<_CharT, _Traits>
  41   //  basic_istream& operator>>(istream&, _CharT*)
  42   const int n = 20;
  43   char array1[n];
  44   array1[0] = '\0';
  45   typedef std::ios::traits_type ctraits_type;
  46   ctraits_type::int_type i1, i2;
  47
  48   state1 = is_01.rdstate();
  49   i1 = ctraits_type::length(array1);
  50   is_01 >> array1;   // should snake 0 characters, not alter stream state
  51   i2 = ctraits_type::length(array1);
  52   state2 = is_01.rdstate();
  53   VERIFY( i1 == i2 );
  54   VERIFY( state1 != state2 );
  55   VERIFY( static_cast<bool>(state2 & statefail) );
  56
  57   state1 = is_02.rdstate();
  58   is_02 >> array1;   // should snake "coltrane"
  59   state2 = is_02.rdstate();
  60   VERIFY( state1 == state2 );
  61   VERIFY( !static_cast<bool>(state2 & statefail) );
  62   VERIFY( array1[str_03.size() - 1] == 'e' );
  63   array1[str_03.size()] = '\0';
  64   VERIFY( !str_03.compare(0, str_03.size(), array1) );
  65   std::istream::int_type int1 = is_02.peek(); // should be ' '
  66   VERIFY( int1 == ' ' );
  67
  68   state1 = is_02.rdstate();
  69   is_02 >> array1;   // should snake "playing" as sentry "eats" ws
  70   state2 = is_02.rdstate();
  71   int1 = is_02.peek(); // should be ' '
  72   VERIFY( int1 == ' ' );
  73   VERIFY( state1 == state2 );
  74   VERIFY( !static_cast<bool>(state2 & statefail) );
  75
  76   // template<_CharT, _Traits>
  77   //  basic_istream& operator>>(istream&, unsigned char*)
  78   unsigned char array2[n];
  79   state1 = is_02.rdstate();
  80   is_02 >> array2;   // should snake 'softly
  81   state2 = is_02.rdstate();
  82   VERIFY( state1 == state2 );
  83   VERIFY( !static_cast<bool>(state2 & statefail) );
  84   VERIFY( array2[0] == '\'' );
  85   VERIFY( array2[1] == 's' );
  86   VERIFY( array2[6] == 'y' );
  87   int1 = is_02.peek(); // should be ' '
  88   VERIFY( int1 == ' ' );
  89
  90   // template<_CharT, _Traits>
  91   //  basic_istream& operator>>(istream&, signed char*)
  92   signed char array3[n];
  93   state1 = is_02.rdstate();
  94   is_02 >> array3;   // should snake "as"
  95   state2 = is_02.rdstate();
  96   VERIFY( state1 == state2 );
  97   VERIFY( !static_cast<bool>(state2 & statefail) );
  98   VERIFY( array3[0] == 'a' );
  99   VERIFY( array3[1] == 's' );
 100   int1 = is_02.peek(); // should be ' '
 101   VERIFY( int1 == ' ' );
 102 }
 103
 104 int main()
 105 {
 106   test01();
 107   return 0;
 108 }