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// 2003-04-12  Paolo Carlini  <pcarlini at unitus dot it>

// Copyright (C) 2003, 2004, 2005, 2006, 2007, 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/>.

// stdio_filebuf.h

// { dg-require-fileio "" }

#include <ext/stdio_filebuf.h>

#include <cstdio>

#include <fstream>

#include <cstring>

#include <testsuite_hooks.h>

// Small stack-based buffers (i.e., using _M_unbuf) were not flushed

// out by _M_really_overflow upon overflow.

void test01()

{

  using namespace std;

  bool test __attribute__((unused)) = true;

  const char* name = "tmp_file1";

  FILE* file = fopen(name, "w");

  {

    using namespace __gnu_cxx;

    stdio_filebuf<char> sbuf(file, ios_base::out, 2);

    sbuf.sputc('T');

    sbuf.sputc('S');

    sbuf.sputc('P');

  }

  fclose(file);

  filebuf fbuf;

  fbuf.open(name, ios_base::in);

  char buf[10];

  streamsize n = fbuf.sgetn(buf, sizeof(buf));

  fbuf.close();

  VERIFY( n == 3 );

  VERIFY( !memcmp(buf, "TSP", 3) );

}

int main()

{

  test01();

}