/* Test of snprintf() function.

   Copyright (C) 2007-2020 Free Software Foundation, Inc.

   This program 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 of the License, or

   (at your option) any later version.

   This program 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 program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */

#include <config.h>

#include <stdio.h>

#include "signature.h"

SIGNATURE_CHECK (snprintf, int, (char *, size_t, char const *, ...));

#include <string.h>

#include "macros.h"

int

main (int argc, char *argv[])

{

  char buf[8];

  int size;

  int retval;

  retval = snprintf (NULL, 0, "%d", 12345);

  ASSERT (retval == 5);

  for (size = 0; size <= 8; size++)

    {

      memcpy (buf, "DEADBEEF", 8);

      retval = snprintf (buf, size, "%d", 12345);

      ASSERT (retval == 5);

      if (size < 6)

        {

          if (size > 0)

            {

              ASSERT (memcmp (buf, "12345", size - 1) == 0);

              ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size);

            }

#if !CHECK_SNPRINTF_POSIX

          if (size > 0)

#endif

            ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);

        }

      else

        {

          ASSERT (memcmp (buf, "12345\0EF", 8) == 0);

        }

    }

  /* Test the support of the POSIX/XSI format strings with positions.  */

  {

    char result[100];

    retval = snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);

    ASSERT (strcmp (result, "55 33") == 0);

    ASSERT (retval == strlen (result));

  }

  return 0;

}