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

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

// 27.8.1.4 Overridden virtual functions

#include <fstream>

#include <testsuite_hooks.h>

#include <testsuite_io.h>

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

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

const char name_02[] = "tmp_sgetn_2out.tst"; // empty file, need to create

// Test overloaded virtual functions.

void test05()

{

  using namespace std;

  using namespace __gnu_test;

  typedef filebuf::int_type     int_type;

  typedef filebuf::traits_type  traits_type;

  bool test __attribute__((unused)) = true;

  streamsize                    strmsz_1, strmsz_2;

  char carray2[8192] = "";

  int_type                      c2, c4;

  // streamsize sgetn(char_type *s, streamsize n)

  // streamsize xsgetn(char_type *s, streamsize n)

  // assign up to n chars to s from input sequence, indexing in_cur as

  // approp and returning the number of chars assigned

  // out

  {

    constraint_filebuf fb_02;

    fb_02.pubsetbuf(0, 0);

    fb_02.open(name_02, ios_base::out | ios_base::trunc);

    VERIFY( fb_02.unbuffered() );

    VERIFY( !fb_02.read_position() );

    strmsz_2 = fb_02.in_avail();

    strmsz_2 = fb_02.sgetn(carray2, 10);

    VERIFY( strmsz_2 == 0 );

    c2 = fb_02.sgetc();

    VERIFY( c2 == traits_type::eof() );

    strmsz_1 = fb_02.in_avail();

    strmsz_2 = fb_02.sgetn(carray2, strmsz_1 + 5);

    VERIFY( strmsz_1 == -1 );

    VERIFY( strmsz_2 == 0 );

    c4 = fb_02.sgetc();

    VERIFY( fb_02.unbuffered() );

    VERIFY( !fb_02.read_position() );

  }

}

int main()

{

  test05();

  return 0;

}