libstdc++-v3/testsuite/27_io/basic_istream/getline/char/4.cc

   1 // Copyright (C) 2004-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18
  19 // 27.6.1.3 unformatted input functions
  20
  21 #include <cstring> // for strlen
  22 #include <istream>
  23 #include <testsuite_hooks.h>
  24
  25 class Inbuf : public std::streambuf
  26 {
  27   static const char buf[];
  28   const char* current;
  29   int size;
  30
  31 public:
  32   Inbuf()
  33   {
  34     current = buf;
  35     size = std::strlen(buf);
  36   }
  37
  38   int_type underflow()
  39   {
  40     if (current < buf + size)
  41       return traits_type::to_int_type(*current);
  42     return traits_type::eof();
  43   }
  44
  45   int_type uflow()
  46   {
  47     if (current < buf + size)
  48       return traits_type::to_int_type(*current++);
  49     return traits_type::eof();
  50   }
  51 };
  52
  53 const char Inbuf::buf[] = "1234567890abcdefghij";
  54
  55 void test01()
  56 {
  57   using namespace std;
  58
  59   typedef char_traits<char>   traits_type;
  60
  61   Inbuf inbuf1;
  62   istream is(&inbuf1);
  63
  64   char buffer[10];
  65   traits_type::assign(buffer, sizeof(buffer), 'X');
  66
  67   is.getline(buffer, sizeof(buffer), '0');
  68   VERIFY( is.rdstate() == ios_base::goodbit );
  69   VERIFY( !traits_type::compare(buffer, "123456789\0", sizeof(buffer)) );
  70   VERIFY( is.gcount() == 10 );
  71
  72   is.clear();
  73   traits_type::assign(buffer, sizeof(buffer), 'X');
  74   is.getline(buffer, sizeof(buffer));
  75   VERIFY( is.rdstate() == ios_base::failbit );
  76   VERIFY( !traits_type::compare(buffer, "abcdefghi\0", sizeof(buffer)) );
  77   VERIFY( is.gcount() == 9 );
  78
  79   is.clear();
  80   traits_type::assign(buffer, sizeof(buffer), 'X');
  81   is.getline(buffer, sizeof(buffer));
  82   VERIFY( is.rdstate() == ios_base::eofbit );
  83   VERIFY( !traits_type::compare(buffer, "j\0XXXXXXXX", sizeof(buffer)) );
  84   VERIFY( is.gcount() == 1 );
  85
  86   is.clear();
  87   traits_type::assign(buffer, sizeof(buffer), 'X');
  88   is.getline(buffer, sizeof(buffer));
  89   VERIFY( is.rdstate() == (ios_base::eofbit | ios_base::failbit) );
  90   VERIFY( !traits_type::compare(buffer, "\0XXXXXXXXX", sizeof(buffer)) );
  91   VERIFY( is.gcount() == 0 );
  92 }
  93
  94 int main()
  95 {
  96   test01();
  97   return 0;
  98 }