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// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>

// Copyright (C) 2001, 2002, 2003, 2009 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/>.

// 27.8.1.4 Overridden virtual functions

// { dg-require-fileio "" }

#include <fstream>

#include <testsuite_hooks.h>

#include <testsuite_io.h>

// @require@ %-*.tst %-*.txt

// @diff@ %-*.tst %*.txt

const char name_01[] = "sgetc.txt"; // file with data in it

// Test overloaded virtual functions.

void test01()

{

  using namespace std;

  using namespace __gnu_test;

  typedef std::filebuf::int_type        int_type;

  typedef filebuf::traits_type          traits_type;

  bool test __attribute__((unused)) = true;

  int_type                      c1, c2, c3;

  // int_type sputbackc(char_type c)

  // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail

  // otherwise decrements in_cur and returns *gptr()

  // in

  {

    constraint_filebuf fb_01; // in 

    fb_01.pubsetbuf(0, 0);

    fb_01.open(name_01, ios::in);

    VERIFY( fb_01.unbuffered() );

    c1 = fb_01.sbumpc();

    VERIFY( c1 == '/' );

    c2 = fb_01.sputbackc('/');

    VERIFY( c1 == c2 );

    c3 = fb_01.sgetc();

    VERIFY( c3 == c2 );

    c3 = fb_01.sbumpc();

    VERIFY( c3 == c2 );

    fb_01.sbumpc();

    c3 = fb_01.sbumpc();

    VERIFY( c3 == ' ' );

    c1 = fb_01.sgetc();

    c2 = fb_01.sputbackc('a');

    VERIFY( c2 == 'a' );

    c3 = fb_01.sbumpc();

    VERIFY( c3 == c2 );

    c3 = fb_01.sgetc();

    VERIFY( c1 == c3 );

    fb_01.pubseekoff(5, ios_base::beg, ios_base::in);

    c1 = fb_01.sgetc();

    VERIFY( c1 == '0' );

    fb_01.sbumpc();

    c1 = fb_01.sbumpc();

    VERIFY( c1 == '1' );

    c2 = fb_01.sputbackc('b');

    VERIFY( c2 == 'b' );

    fb_01.sbumpc();

    c3 = fb_01.sbumpc();

    VERIFY( c3 == '1' );

    c3 = fb_01.sbumpc();

    VERIFY( c3 == '7' );

    VERIFY( fb_01.unbuffered() );

  }

}

int main()

{

  test01();

  return 0;

}