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// Copyright (c) Meta Platforms, Inc. and affiliates.
// SPDX-License-Identifier: LGPL-2.1-or-later
/**
* @file
*
* Helpers for C arrays.
*/
#ifndef DRGN_ARRAY_H
#define DRGN_ARRAY_H
#include "pp.h"
#include "util.h"
/** @cond */
#define array_for_each_impl(var, arr, unique_end) \
for (typeof((arr)[0]) *var = (arr), \
*unique_end = var + array_size(arr); \
var < unique_end; var++)
/** @endcond */
/**
* Return the number of elements in an array.
*
* @hideinitializer
*/
#define array_size(arr) \
static_assert_expression(is_array(arr), \
"not an array", \
sizeof(arr) / sizeof((arr)[0]))
/**
* Iterate over every element in an array.
*
* The element is declared as `element_type *var` in the scope of the loop.
*
* @hideinitializer
*/
#define array_for_each(var, arr) \
array_for_each_impl(var, arr, PP_UNIQUE(end))
#endif /* DRGN_ARRAY_H */
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