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

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003 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 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 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // 27.5.2 template class basic_streambuf
  31
  32 #include <cstring> // for memset, memcmp
  33 #include <streambuf>
  34 #include <sstream>
  35 #include <ostream>
  36 #include <testsuite_hooks.h>
  37
  38 // libstdc++/9424
  39 class Outbuf_2 : public std::streambuf
  40 {
  41   char buf[1];
  42
  43 public:
  44   Outbuf_2()
  45   {
  46     setp(buf, buf + 1);
  47   }
  48
  49   int_type overflow(int_type c)
  50   {
  51     int_type eof = traits_type::eof();
  52
  53     if (pptr() < epptr())
  54       {
  55         if (traits_type::eq_int_type(c, eof))
  56           return traits_type::not_eof(c);
  57
  58         *pptr() = traits_type::to_char_type(c);
  59         pbump(1);
  60         return c;
  61       }
  62
  63     return eof;
  64   }
  65 };
  66
  67 class Inbuf_2 : public std::streambuf
  68 {
  69   static const char buf[];
  70   const char* current;
  71   int size;
  72
  73 public:
  74   Inbuf_2()
  75   {
  76     current = buf;
  77     size = std::strlen(buf);
  78   }
  79
  80   int_type underflow()
  81   {
  82     if (current < buf + size)
  83       return traits_type::to_int_type(*current);
  84     return traits_type::eof();
  85   }
  86
  87   int_type uflow()
  88   {
  89     if (current < buf + size)
  90       return traits_type::to_int_type(*current++);
  91     return traits_type::eof();
  92   }
  93 };
  94
  95 const char Inbuf_2::buf[] = "Atteivlis";
  96
  97 void test11()
  98 {
  99   bool test __attribute__((unused)) = true;
 100
 101   Inbuf_2 inbuf1;
 102   std::istream is(&inbuf1);
 103   Outbuf_2 outbuf1;
 104   is >> &outbuf1;
 105   VERIFY( inbuf1.sgetc() == 't' );
 106   VERIFY( is.good() );
 107 }
 108
 109 int main()
 110 {
 111   test11();
 112   return 0;
 113 }