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// 1999-07-28 bkoz

// Copyright (C) 1999, 2001, 2003 Free Software Foundation

//

// 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 2, 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 COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// 27.6.1.2.3 basic_istream::operator>>

#include <istream>

#include <sstream>

#include <testsuite_hooks.h>

// stringbufs.

void test01()

{

  typedef std::ios::traits_type ctraits_type;

  bool test __attribute__((unused)) = true;

  const std::string str_01;

  const std::string str_02("art taylor kickin it on DAKAR");

  std::string strtmp;

  std::stringbuf isbuf_00(std::ios_base::in);

  std::stringbuf isbuf_01(std::ios_base::in | std::ios_base::out);

  std::stringbuf isbuf_02(str_01, std::ios_base::in);

  std::stringbuf isbuf_03(str_01, std::ios_base::in | std::ios_base::out);

  std::stringbuf isbuf_04(str_02, std::ios_base::in);

  std::stringbuf isbuf_05(str_02, std::ios_base::in | std::ios_base::out);

  std::istream is_00(NULL);

  std::istream is_01(&isbuf_01);

  std::istream is_02(&isbuf_02);

  std::istream is_03(&isbuf_03);

  std::istream is_04(&isbuf_04);

  std::istream is_05(&isbuf_05);

  std::ios_base::iostate state1, state2, statefail, stateeof;

  statefail = std::ios_base::failbit;

  stateeof = std::ios_base::eofbit;

  // template<_CharT, _Traits>

  //  basic_istream& operator>>(basic_streambuf*)

  // null istream to empty in_buf

  state1 = is_00.rdstate();

  is_00 >> &isbuf_00;

  state2 = is_00.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_00.str() == str_01 );

  // null istream to empty in_out_buf

  is_00.clear(std::ios_base::goodbit);

  state1 = is_00.rdstate();

  is_00 >> &isbuf_01;

  state2 = is_00.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_01.str() == str_01 );

  // null istream to full in_buf

  is_00.clear(std::ios_base::goodbit);

  state1 = is_00.rdstate();

  is_00 >> &isbuf_04;

  state2 = is_00.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_04.str() == str_02 );

  // null istream to full in_out_buf

  is_00.clear(std::ios_base::goodbit);

  state1 = is_00.rdstate();

  is_00 >> &isbuf_05;

  state2 = is_00.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_05.str() == str_02 );

  // empty but non-null istream to full in_buf

  state1 = is_02.rdstate();

  is_02 >> &isbuf_04;

  state2 = is_02.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_04.str() == str_02 ); // as only an "in" buffer

  VERIFY( isbuf_04.sgetc() == 'a' );

  // empty but non-null istream to full in_out_buf

  is_02.clear(std::ios_base::goodbit);

  state1 = is_02.rdstate();

  is_02 >> &isbuf_05;

  state2 = is_02.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_05.str() == str_02 ); // as only an "in" buffer

  VERIFY( isbuf_05.sgetc() == 'a' );

  // full istream to empty in_buf (need out_buf, you know?)

  state1 = is_04.rdstate();

  is_04 >> &isbuf_02;

  state2 = is_04.rdstate();

  VERIFY( state1 != state2 );

  VERIFY( static_cast<bool>(state2 & statefail) );

  VERIFY( isbuf_02.str() == str_01 ); // as only an "in" buffer

  VERIFY( isbuf_02.sgetc() == ctraits_type::eof() );

  VERIFY( is_04.peek() == ctraits_type::eof() ); // as failed

  // full istream to empty in_out_buf

  is_04.clear(std::ios_base::goodbit);

  state1 = is_04.rdstate();

  is_04 >> &isbuf_03;

  state2 = is_04.rdstate();

  VERIFY( state1 == state2 );

  VERIFY( !static_cast<bool>(state2 & statefail) );

  VERIFY( state2 != stateeof );

  strtmp = isbuf_03.str();

  VERIFY( strtmp == str_02 ); // as only an "in" buffer

  VERIFY( isbuf_03.sgetc() == 'a' );

  VERIFY( is_04.peek() == ctraits_type::eof() );

}

int main()

{

  test01();

  return 0;

}