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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <math.h>
#include "macro.h"
/* On some optimization level, iszero(x) is converted to (x == 0.0), and emits warning -Wfloat-equal.
* The argument must be a floating point, i.e. one of float, double, or long double. */
#define iszero_safe(x) (fpclassify(x) == FP_ZERO)
/* To avoid x == y and triggering compile warning -Wfloat-equal. This returns false if one of the argument is
* NaN or infinity. One of the argument must be a floating point. */
#define fp_equal(x, y) iszero_safe((x) - (y))
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