/**
 * @file   compat/c23.h
 * @author Martin Pulec     <pulec@cesnet.cz>
 *
 * fallback implementation of some C23 and C2Y features like nullptr, countof
 * or built-in bool/true/false
 */
/*
 * Copyright (c) 2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
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 * modification, is permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of CESNET nor the names of its contributors may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef COMPAT_C23_H_B55FDBEB_BED9_4D10_85D8_BE8CE8C21997
#define COMPAT_C23_H_B55FDBEB_BED9_4D10_85D8_BE8CE8C21997

#if !defined __cplusplus

// IWYU pragma: begin_exports

// bool, true, false
#if __STDC_VERSION__ < 202311L
        #include <stdbool.h>
#endif

// nullptr
#if __STDC_VERSION__ < 202311L
        #include <stddef.h>
        #define nullptr NULL
#endif

// countof
#if __STDC_VERSION__ >= 202311L && __has_include(<stdcountof.h>)
        #include <stdcountof.h>
#elif !defined countof
        #define countof(arr) (sizeof(arr) / sizeof(arr)[0])
#endif

// IWYU pragma: end_exports

#endif // ! defined __cplusplus
#endif // ! defined COMPAT_C23_H_B55FDBEB_BED9_4D10_85D8_BE8CE8C21997

