/* fmemopen tests for BZ#1930 and BZ#20005.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <assert.h>

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

/* Check if fflush does not reset the file position.  */

static int

do_test (void)

{

  char buffer[500] = "x";

  FILE *stream = fmemopen (buffer, sizeof (buffer), "r+");

  if (stream == NULL)

    {

      printf ("error: fmemopen could not open stream\n");

      return 1;

    }

  const char test[] = "test";

  size_t r = fwrite (test, sizeof (char), sizeof (test), stream);

  if (r != sizeof (test))

    {

      printf ("error: fwrite returned %zu, expected %zu\n", r, sizeof(test));

      return 1;

    }

  r = ftell (stream);

  if (r != sizeof (test))

    {

      printf ("error: ftell return %zu, expected %zu\n", r, sizeof(test));

      return 1;

    }

  if (fflush (stream) != 0)

    {

      printf ("error: fflush failed\n");

      return 1;

    }

  r = ftell (stream);

  if (r != sizeof (test))

    {

      printf ("error: ftell return %zu, expected %zu\n", r, sizeof(test));

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"