math_core.h

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/*
 * CDDL HEADER START
 *
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2023 Saso Kiselkov. All rights reserved.
 */
#ifndef _ACF_UTILS_MATH_CORE_H_
#define _ACF_UTILS_MATH_CORE_H_
 
#include <math.h>
 
#include "assert.h"
#include "core.h"
 
#ifdef  __cplusplus
extern "C" {
#endif
 
#define DEFN_CLAMP(name, type, assert_chk) \
static inline type \
name(type x, type min_val, type max_val) \
{ \
    if (COND_LIKELY(min_val < max_val)) { \
        if (x < min_val) \
            return (min_val); \
        if (x > max_val) \
            return (max_val); \
    } else { \
        if (x > min_val) \
            return (min_val); \
        if (x < max_val) \
            return (max_val); \
    } \
    return (x); \
}
 
DEFN_CLAMP(clamp, double, ASSERT3F)
DEFN_CLAMP(clampl, long, ASSERT3S)
DEFN_CLAMP(clampi, int, ASSERT3S)
 
#undef  DEFN_CLAMP
 
#ifdef  __cplusplus
}
#endif
 
#endif  /* _ACF_UTILS_GEOM_H_ */