libstdc++-v3/testsuite/27_io/basic_streambuf/overflow/wchar_t/1.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2009, 2010
   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 3, 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 COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21
  22 // 27.5.2 template class basic_streambuf
  23
  24 #include <streambuf>
  25 #include <cwchar>
  26 #include <testsuite_hooks.h>
  27
  28 class testbuf : public std::wstreambuf
  29 {
  30 public:
  31
  32   // Typedefs:
  33   typedef std::wstreambuf::traits_type traits_type;
  34   typedef std::wstreambuf::char_type char_type;
  35
  36   testbuf(): std::wstreambuf()
  37   { }
  38
  39   bool
  40   check_pointers()
  41   {
  42     bool test __attribute__((unused)) = true;
  43     VERIFY( !this->eback() );
  44     VERIFY( !this->gptr() );
  45     VERIFY( !this->egptr() );
  46     VERIFY( !this->pbase() );
  47     VERIFY( !this->pptr() );
  48     VERIFY( !this->epptr() );
  49     return test;
  50   }
  51
  52   int_type
  53   pub_uflow()
  54   { return (this->uflow()); }
  55
  56   int_type
  57   pub_overflow(int_type __c = traits_type::eof())
  58   { return (this->overflow(__c)); }
  59
  60   int_type
  61   pub_pbackfail(int_type __c)
  62   { return (this->pbackfail(__c)); }
  63
  64   void
  65   pub_setg(wchar_t* beg, wchar_t* cur, wchar_t* end)
  66   { this->setg(beg, cur, end); }
  67
  68   void
  69   pub_setp(wchar_t* beg, wchar_t* end)
  70   { this->setp(beg, end); }
  71
  72 protected:
  73   int_type
  74   underflow()
  75   {
  76     int_type __retval = traits_type::eof();
  77     if (this->gptr() < this->egptr())
  78       __retval = traits_type::not_eof(0);
  79     return __retval;
  80   }
  81 };
  82
  83 void test01()
  84 {
  85   typedef testbuf::traits_type traits_type;
  86   typedef testbuf::int_type int_type;
  87
  88   bool test __attribute__((unused)) = true;
  89   wchar_t lit01[52];
  90   std::wcscpy(lit01, L"chicago underground trio/possible cube on delmark");
  91   testbuf buf01;
  92
  93   // pbackfail
  94   int i01 = 3;
  95   buf01.pub_setg(lit01, lit01, (lit01 + i01));
  96   VERIFY( i01 == buf01.in_avail() );
  97   int_type intt01 = traits_type::to_int_type(L'b');
  98   VERIFY( traits_type::eof() == buf01.pub_pbackfail(intt01) );
  99
 100   // overflow
 101   VERIFY( traits_type::eof() == buf01.pub_overflow(intt01) );
 102   VERIFY( traits_type::eof() == buf01.pub_overflow() );
 103   VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[0]) );
 104 }
 105
 106 int main()
 107 {
 108   test01();
 109   return 0;
 110 }