/* Copyright (C) 1991-2018 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 <stdio.h>

#define TESTFILE OBJPFX "test.dat"

static int

do_test (void)

{

  FILE *fp;

  int i, j;

  puts ("\nFile seek test");

  fp = fopen (TESTFILE, "w");

  if (fp == NULL)

    {

      perror (TESTFILE);

      return 1;

    }

  for (i = 0; i < 256; i++)

    putc (i, fp);

  if (freopen (TESTFILE, "r", fp) != fp)

    {

      perror ("Cannot open file for reading");

      return 1;

    }

  for (i = 1; i <= 255; i++)

    {

      printf ("%3d\n", i);

      fseek (fp, (long) -i, SEEK_END);

      if ((j = getc (fp)) != 256 - i)

	{

	  printf ("SEEK_END failed %d\n", j);

	  break;

	}

      if (fseek (fp, (long) i, SEEK_SET))

	{

	  puts ("Cannot SEEK_SET");

	  break;

	}

      if ((j = getc (fp)) != i)

	{

	  printf ("SEEK_SET failed %d\n", j);

	  break;

	}

      if (fseek (fp, (long) i, SEEK_SET))

	{

	  puts ("Cannot SEEK_SET");

	  break;

	}

      if (fseek (fp, (long) (i >= 128 ? -128 : 128), SEEK_CUR))

	{

	  puts ("Cannot SEEK_CUR");

	  break;

	}

      if ((j = getc (fp)) != (i >= 128 ? i - 128 : i + 128))

	{

	  printf ("SEEK_CUR failed %d\n", j);

	  break;

	}

    }

  fclose (fp);

  remove (TESTFILE);

  puts ((i > 255) ? "Test succeeded." : "Test FAILED!");

  return (i > 255) ? 0 : 1;

}

#define TEST_FUNCTION do_test ()

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