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[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 27_io / basic_streambuf / overflow / wchar_t / 1.cc

// 1999-10-11 bkoz

// Copyright (C) 1999-2024 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.


// 27.5.2 template class basic_streambuf

#include <streambuf>
#include <cwchar>
#include <testsuite_hooks.h>

class testbuf : public std::wstreambuf
{
public:

  // Typedefs:
  typedef std::wstreambuf::traits_type traits_type;
  typedef std::wstreambuf::char_type char_type;

  testbuf(): std::wstreambuf() 
  { }

  void
  check_pointers()
  {
    VERIFY( !this->eback() );
    VERIFY( !this->gptr() );
    VERIFY( !this->egptr() );
    VERIFY( !this->pbase() );
    VERIFY( !this->pptr() );
    VERIFY( !this->epptr() );
  }

  int_type 
  pub_uflow() 
  { return (this->uflow()); }

  int_type 
  pub_overflow(int_type __c = traits_type::eof()) 
  { return (this->overflow(__c)); }

  int_type 
  pub_pbackfail(int_type __c) 
  { return (this->pbackfail(__c)); }

  void 
  pub_setg(wchar_t* beg, wchar_t* cur, wchar_t* end) 
  { this->setg(beg, cur, end); }

  void 
  pub_setp(wchar_t* beg, wchar_t* end) 
  { this->setp(beg, end); }

protected:
  int_type 
  underflow() 
  { 
    int_type __retval = traits_type::eof();
    if (this->gptr() < this->egptr())
      __retval = traits_type::not_eof(0); 
    return __retval;
  }
};

void test01()
{
  typedef testbuf::traits_type traits_type;
  typedef testbuf::int_type int_type;

  wchar_t lit01[52];
  std::wcscpy(lit01, L"chicago underground trio/possible cube on delmark");
  testbuf buf01;

  // pbackfail
  int i01 = 3;
  buf01.pub_setg(lit01, lit01, (lit01 + i01));
  VERIFY( i01 == buf01.in_avail() );
  int_type intt01 = traits_type::to_int_type(L'b');
  VERIFY( traits_type::eof() == buf01.pub_pbackfail(intt01) );

  // overflow
  VERIFY( traits_type::eof() == buf01.pub_overflow(intt01) );
  VERIFY( traits_type::eof() == buf01.pub_overflow() );
  VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[0]) );
}

int main() 
{
  test01();
  return 0;
}