utils.h

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/*
 * Copyright (C) 2023 Otto-von-Guericke-Universität Magdeburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define CONCAT(a, b) a ## b
 
#define CONCAT3(a, b, c) a ## b ## c
 
#define CONCAT4(a, b, c, d) a ## b ## c ## d
 
/* For compatibility with vendor headers, only provide MAX() and MIN() if not
 * provided. (The alternative approach of using #undef has the downside that
 * vendor header files may provide a smarter version of MAX() / MIN() that does
 * not evaluate the argument twice and rely on this).
 */
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
 
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
 
#ifndef ABS
#define ABS(x) ((x) > 0 ? (x) : -(x))
#endif
 
#define LIMIT(val, low, high) ((val < low) ? low : (val > high) ? high : val)
 
#ifdef __cplusplus
}
#endif