minmax.h

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/*
 * Copyright (c) 2011-2014, Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_SYS_MINMAX_H_
#define ZEPHYR_INCLUDE_SYS_MINMAX_H_
 
#include <zephyr/sys/util.h>
 
#ifndef _ASMLANGUAGE
 
#ifdef __cplusplus
extern "C" {
#endif

#define _minmax_unique(op, a, b, ua, ub) ({ \
                __typeof__(a) ua = (a);     \
                __typeof__(b) ub = (b);     \
                op(ua, ub);                 \
        })
 
#define _minmax_cnt(op, a, b, cnt) \
        _minmax_unique(op, a, b, UTIL_CAT(_value_a_, cnt), UTIL_CAT(_value_b_, cnt))
 
#define _minmax3_unique(op, a, b, c, ua, ub, uc) ({ \
                __typeof__(a) ua = (a);             \
                __typeof__(b) ub = (b);             \
                __typeof__(c) uc = (c);             \
                op(ua, op(ub, uc));                 \
        })
 
#define _minmax3_cnt(op, a, b, c, cnt)            \
        _minmax3_unique(op, a, b, c,              \
                        UTIL_CAT(_value_a_, cnt), \
                        UTIL_CAT(_value_b_, cnt), \
                        UTIL_CAT(_value_c_, cnt))
 
#ifndef __cplusplus
#define max(a, b) _minmax_cnt(Z_INTERNAL_MAX, a, b, __COUNTER__)
#endif

#define max3(a, b, c) _minmax3_cnt(Z_INTERNAL_MAX, a, b, c, __COUNTER__)
 
#ifndef __cplusplus
#define min(a, b) _minmax_cnt(Z_INTERNAL_MIN, a, b, __COUNTER__)
#endif

#define min3(a, b, c) _minmax3_cnt(Z_INTERNAL_MIN, a, b, c, __COUNTER__)
 
#ifndef __cplusplus
#define clamp(val, low, high) ({                                               \
                /* random suffix to avoid naming conflict */                   \
                __typeof__(val) _value_val_ = (val);                           \
                __typeof__(low) _value_low_ = (low);                           \
                __typeof__(high) _value_high_ = (high);                        \
                (_value_val_ < _value_low_)  ? _value_low_ :                   \
                (_value_val_ > _value_high_) ? _value_high_ :                  \
                                               _value_val_;                    \
        })
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* _ASMLANGUAGE */
 
#endif /* ZEPHYR_INCLUDE_SYS_MINMAX_H_ */