/* SPDX-License-Identifier: LGPL-2.1-or-later OR (GPL-2.0-or-later WITH eCos-exception-2.0) */

/*

  This file is part of GNU libmicrohttpd.

  Copyright (C) 2024 Evgeny Grin (Karlson2k)

  GNU libmicrohttpd 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.

  GNU libmicrohttpd 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.

  Alternatively, you can redistribute GNU libmicrohttpd and/or

  modify it under the terms of the GNU General Public License as

  published by the Free Software Foundation; either version 2 of

  the License, or (at your option) any later version, together

  with the eCos exception, as follows:

    As a special exception, if other files instantiate templates or

    use macros or inline functions from this file, or you compile this

    file and link it with other works to produce a work based on this

    file, this file does not by itself cause the resulting work to be

    covered by the GNU General Public License. However the source code

    for this file must still be made available in accordance with

    section (3) of the GNU General Public License v2.

    This exception does not invalidate any other reasons why a work

    based on this file might be covered by the GNU General Public

    License.

  You should have received copies of the GNU Lesser General Public

  License and the GNU General Public License along with this library;

  if not, see <https://www.gnu.org/licenses/>.

*/

/**

 * @file src/mhd2/mhd_panic.c

 * @brief  mhd_panic() and MHD_lib_set_panic_func() implementations

 * @author Karlson2k (Evgeny Grin)

 */

#include "mhd_sys_options.h"

#include <stdio.h>

#ifdef HAVE_STDLIB_H

#  include <stdlib.h>

#elif defined(HAVE_UNISTD_H)

#  include <unistd.h>

#endif

#include "sys_null_macro.h"

#include "mhd_public_api.h"

#include "mhd_panic.h"

/**

 * The user handler for panic

 */

static MHD_PanicCallback user_panic_handler = (MHD_PanicCallback) NULL;

/**

 * The closure argument for the #user_panic_handler

 */

static void *user_panic_handler_cls = NULL;

MHD_INTERNAL void

mhd_panic_init_default (void)

{

  user_panic_handler = (MHD_PanicCallback) NULL;

}

MHD_EXTERN_ void

MHD_lib_set_panic_func (MHD_PanicCallback cb,

                        void *cls)

{

  user_panic_handler = cb;

  user_panic_handler_cls = cls;

}

MHD_NORETURN_ MHD_INTERNAL void

mhd_panic (const char *file,

           const char *func,

           unsigned int line,

           const char *message)

{

  static const char empty_str[1] = "";

  if (NULL == file)

    file = empty_str;

  if (NULL == func)

    func = empty_str;

  if (NULL == message)

    message = empty_str;

  if (NULL != user_panic_handler)

    user_panic_handler (user_panic_handler_cls,

                        file, func, line, message);

#ifdef MHD_SUPPORT_LOG_FUNCTIONALITY

  if (0 == file[0])

    fprintf (stderr,

             "Unrecoverable error detected in GNU libmicrohttpd%s%s\n",

             (0 == message[0]) ? "" : ": ",

             message);

  else

  {

    if (0 != func[0])

    {

      fprintf (stderr,

               "Unrecoverable error detected in GNU libmicrohttpd, " \

               "file '%s' at %s:%u%s%s\n",

               file, func, line,

               (0 == message[0]) ? "" : ": ",

               message);

    }

    else

    {

      fprintf (stderr,

               "Unrecoverable error detected in GNU libmicrohttpd, " \

               "file '%s' at line %u%s%s\n",

               file, line,

               (0 == message[0]) ? "" : ": ",

               message);

    }

  }

#endif /* MHD_SUPPORT_LOG_FUNCTIONALITY */

  abort ();

}