libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/9424-in.cc

   1 // Copyright (C) 2004-2016 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 // 27.5.2 template class basic_streambuf
  20
  21 #include <cstring>
  22 #include <cwchar>
  23 #include <streambuf>
  24 #include <sstream>
  25 #include <ostream>
  26 #include <testsuite_hooks.h>
  27
  28 // libstdc++/9424
  29 class Outbuf_2 : public std::wstreambuf
  30 {
  31   wchar_t buf[1];
  32
  33 public:
  34   Outbuf_2()
  35   {
  36     setp(buf, buf + 1);
  37   }
  38
  39   int_type overflow(int_type c)
  40   {
  41     int_type eof = traits_type::eof();
  42
  43     if (pptr() < epptr())
  44       {
  45         if (traits_type::eq_int_type(c, eof))
  46           return traits_type::not_eof(c);
  47
  48         *pptr() = traits_type::to_char_type(c);
  49         pbump(1);
  50         return c;
  51       }
  52
  53     return eof;
  54   }
  55 };
  56
  57 class Inbuf_2 : public std::wstreambuf
  58 {
  59   static const wchar_t buf[];
  60   const wchar_t* current;
  61   int size;
  62
  63 public:
  64   Inbuf_2()
  65   {
  66     current = buf;
  67     size = std::wcslen(buf);
  68   }
  69
  70   int_type underflow()
  71   {
  72     if (current < buf + size)
  73       return traits_type::to_int_type(*current);
  74     return traits_type::eof();
  75   }
  76
  77   int_type uflow()
  78   {
  79     if (current < buf + size)
  80       return traits_type::to_int_type(*current++);
  81     return traits_type::eof();
  82   }
  83 };
  84
  85 const wchar_t Inbuf_2::buf[] = L"Atteivlis";
  86
  87 void test11()
  88 {
  89   bool test __attribute__((unused)) = true;
  90
  91   Inbuf_2 inbuf1;
  92   std::wistream is(&inbuf1);
  93   Outbuf_2 outbuf1;
  94   is >> &outbuf1;
  95   VERIFY( inbuf1.sgetc() == L't' );
  96   VERIFY( is.good() );
  97 }
  98
  99 int main()
 100 {
 101   test11();
 102   return 0;
 103 }