old-autovect-branch/libstdc++-v3/testsuite/27_io/basic_streambuf/sync/wchar_t/1057.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 // 27.5.2 template class basic_streambuf
  32
  33 #include <streambuf>
  34 #include <string>
  35 #include <testsuite_hooks.h>
  36
  37 class setpbuf : public std::wstreambuf
  38 {
  39   wchar_t       buffer[4];
  40   std::wstring  result;
  41
  42 public:
  43
  44   std::wstring&
  45   get_result()
  46   { return result; }
  47
  48   setpbuf()
  49   {
  50     wchar_t foo[32];
  51     setp(foo, foo + 32);
  52     setp(buffer, buffer + 4);
  53   }
  54
  55   ~setpbuf()
  56   { sync(); }
  57
  58   virtual int_type
  59   overflow(int_type n)
  60   {
  61     if (sync() != 0)
  62       return traits_type::eof();
  63
  64     result += traits_type::to_char_type(n);
  65
  66     return n;
  67   }
  68
  69   virtual int
  70   sync()
  71   {
  72     result.append(pbase(), pptr());
  73     setp(buffer, buffer + 4);
  74     return 0;
  75   }
  76 };
  77
  78 // libstdc++/1057
  79 void test04()
  80 {
  81   bool test __attribute__((unused)) = true;
  82   std::wstring text = L"abcdefghijklmn";
  83
  84   // 01
  85   setpbuf sp1;
  86   // Here xsputn writes over sp1.result
  87   sp1.sputn(text.c_str(), text.length());
  88
  89   // This crashes when result is accessed
  90   sp1.pubsync();
  91   VERIFY( sp1.get_result() == text );
  92
  93   // 02
  94   setpbuf sp2;
  95   for (std::wstring::size_type i = 0; i < text.length(); ++i)
  96     {
  97       // sputc also writes over result
  98       sp2.sputc(text[i]);
  99     }
 100
 101   // Crash here
 102   sp2.pubsync();
 103   VERIFY( sp2.get_result() == text );
 104 }
 105
 106 int main()
 107 {
 108   test04();
 109   return 0;
 110 }