/* Simple test of putwc in the C locale.

   Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.

   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 <errno.h>

#include <error.h>

#include <stdio.h>

#include <stdlib.h>

#include <wchar.h>

static const char outname[] = OBJPFX "tst_putwc.temp";

/* Prototype for our test function.  */

int do_test (void);

#define TEST_FUNCTION do_test ()

/* This defines the `main' function and some more.  */

#include <test-skeleton.c>

int

do_test (void)

{

  const wchar_t str[] = L"This is a test of putwc\n";

  wchar_t buf[100];

  size_t n = 0;

  FILE *fp;

  int res = 0;

  add_temp_file (outname);

  fp = fopen (outname, "w+");

  if (fp == NULL)

    error (EXIT_FAILURE, errno, "cannot open temporary file");

  for (n = 0; str[n] != L'\0'; ++n)

    putwc (str[n], fp);

  /* First try reading after rewinding.  */

  rewind (fp);

  wmemset (buf, L'\0', sizeof (buf) / sizeof (buf[0]));

  n = 0;

  while (! feof (fp) && n < sizeof (buf) - 1)

    {

      buf[n] = getwc (fp);

      if (buf[n] == WEOF)

	break;

      ++n;

    }

  buf[n] = L'\0';

  if (wcscmp (buf, L"This is a test of putwc\n") != 0)

    {

      puts ("first comparison failed");

      res = 1;

    }

  /* Now close the file, open it again, and read again.  */

  if (fclose (fp) != 0)

    {

      printf ("failure during fclose: %m\n");

      res = 1;

    }

  fp = fopen (outname, "r");

  if (fp == NULL)

    {

      printf ("cannot reopen file: %m\n");

      return 1;

    }

  /* We can remove the file now.  */

  remove (outname);

  wmemset (buf, L'\0', sizeof (buf) / sizeof (buf[0]));

  n = 0;

  while (! feof (fp) && n < sizeof (buf) - 1)

    {

      buf[n] = getwc (fp);

      if (buf[n] == WEOF)

	break;

      ++n;

    }

  buf[n] = L'\0';

  if (wcscmp (buf, L"This is a test of putwc\n") != 0)

    {

      puts ("second comparison failed");

      res = 1;

    }

  if (fclose (fp) != 0)

    {

      printf ("failure during fclose: %m\n");

      res = 1;

    }

  /* Next test: write a bit more than a few bytes.  */

  fp = fopen (outname, "w");

  if (fp == NULL)

    error (EXIT_FAILURE, errno, "cannot open temporary file");

  for (n = 0; n < 4098; ++n)

    putwc (n & 255, fp);

  fclose (fp);

  return res;

}