#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <wchar.h>

#define FAIL() \

  do {							\

    result = 1;						\

    printf ("test at line %d failed\n", __LINE__);	\

  } while (0)

static int

xsscanf (const char *str, const char *fmt, ...)

{

  va_list ap;

  va_start (ap, fmt);

  int ret = vsscanf (str, fmt, ap);

  va_end (ap);

  return ret;

}

static int

xscanf (const char *fmt, ...)

{

  va_list ap;

  va_start (ap, fmt);

  int ret = vscanf (fmt, ap);

  va_end (ap);

  return ret;

}

static int

xfscanf (FILE *f, const char *fmt, ...)

{

  va_list ap;

  va_start (ap, fmt);

  int ret = vfscanf (f, fmt, ap);

  va_end (ap);

  return ret;

}

int

main (void)

{

  wchar_t *lsp;

  char *sp;

  float f;

  double d;

  char c[8];

  int result = 0;

  if (xsscanf (" 0.25s x", "%e%3c", &f, c) != 2)

    FAIL ();

  else if (f != 0.25 || memcmp (c, "s x", 3) != 0)

    FAIL ();

  if (xsscanf (" 1.25s x", "%as%2c", &sp, c) != 2)

    FAIL ();

  else

    {

      if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)

	FAIL ();

      memset (sp, 'x', sizeof "1.25s");

      free (sp);

    }

  if (xsscanf (" 2.25s x", "%las%2c", &d, c) != 2)

    FAIL ();

  else if (d != 2.25 || memcmp (c, " x", 2) != 0)

    FAIL ();

  if (xsscanf (" 3.25S x", "%4aS%3c", &lsp, c) != 2)

    FAIL ();

  else

    {

      if (wcscmp (lsp, L"3.25") != 0 || memcmp (c, "S x", 3) != 0)

	FAIL ();

      memset (lsp, 'x', sizeof L"3.25");

      free (lsp);

    }

  if (xsscanf ("4.25[0-9.] x", "%a[0-9.]%8c", &sp, c) != 2)

    FAIL ();

  else

    {

      if (strcmp (sp, "4.25") != 0 || memcmp (c, "[0-9.] x", 8) != 0)

	FAIL ();

      memset (sp, 'x', sizeof "4.25");

      free (sp);

    }

  if (xsscanf ("5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)

    FAIL ();

  else if (d != 5.25 || memcmp (c, " x", 2) != 0)

    FAIL ();

  const char *tmpdir = getenv ("TMPDIR");

  if (tmpdir == NULL || tmpdir[0] == '\0')

    tmpdir = "/tmp";

  char fname[strlen (tmpdir) + sizeof "/tst-scanf16.XXXXXX"];

  sprintf (fname, "%s/tst-scanf16.XXXXXX", tmpdir);

  if (fname == NULL)

    FAIL ();

  /* Create a temporary file.   */

  int fd = mkstemp (fname);

  if (fd == -1)

    FAIL ();

  FILE *fp = fdopen (fd, "w+");

  if (fp == NULL)

    FAIL ();

  else

    {

      if (fputs (" 1.25s x", fp) == EOF)

	FAIL ();

      if (fseek (fp, 0, SEEK_SET) != 0)

	FAIL ();

      if (xfscanf (fp, "%as%2c", &sp, c) != 2)

	FAIL ();

      else

	{

	  if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)

	    FAIL ();

	  memset (sp, 'x', sizeof "1.25s");

	  free (sp);

	}

      if (freopen (fname, "r", stdin) == NULL)

	FAIL ();

      else

	{

	  if (xscanf ("%as%2c", &sp, c) != 2)

	    FAIL ();

	  else

	    {

	      if (strcmp (sp, "1.25s") != 0 || memcmp (c, " x", 2) != 0)

		FAIL ();

	      memset (sp, 'x', sizeof "1.25s");

	      free (sp);

	    }

	}

      fclose (fp);

    }

  remove (fname);

  return result;

}