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/*
* Some standard helpful macros.
*
* The canonical version of this file is maintained in the rra-c-util package,
* which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2014 Russ Allbery <eagle@eyrie.org>
* Copyright 2008-2011
* The Board of Trustees of the Leland Stanford Junior University
*
* Copying and distribution of this file, with or without modification, are
* permitted in any medium without royalty provided the copyright notice and
* this notice are preserved. This file is offered as-is, without any
* warranty.
*
* SPDX-License-Identifier: FSFAP
*/
#ifndef UTIL_MACROS_H
#define UTIL_MACROS_H 1
#include <portable/macros.h>
/*
* Used for iterating through arrays. ARRAY_SIZE returns the number of
* elements in the array (useful for a < upper bound in a for loop) and
* ARRAY_END returns a pointer to the element past the end (ISO C99 makes it
* legal to refer to such a pointer as long as it's never dereferenced).
*/
#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
#define ARRAY_END(array) (&(array)[ARRAY_SIZE(array)])
/* Used to name the elements of the array passed to pipe. */
#define PIPE_READ 0
#define PIPE_WRITE 1
/* Used for unused parameters to silence gcc warnings. */
#define UNUSED __attribute__((__unused__))
#endif /* UTIL_MACROS_H */
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