macro.h

/*
 * macro.h
 * Copyright (C) 2023 youfa <vsyfar@gmail.com>
 *
 * Distributed under terms of the GPLv2 license.
 */

#ifndef MACRO_H
#define MACRO_H

#include <stddef.h>

// The arraysize(arr) macro returns the # of elements in an array arr.
// The expression is a compile-time constant, and therefore can be
// used in defining new arrays, for example.  If you use arraysize on
// a pointer by mistake, you will get a compile-time error.

// This template function declaration is used in defining arraysize.
// Note that the function doesn't need an implementation, as we only
// use its type.
template <typename T, size_t N>
char (&ArraySizeHelper(T (&array)[N]))[N];

#define arraysize(array) (sizeof(ArraySizeHelper(array)))

#endif /* !MACRO_H */