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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/basic/math-util.h | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/basic/math-util.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/basic/math-util.h b/src/basic/math-util.h new file mode 100644 index 0000000..24023cd --- /dev/null +++ b/src/basic/math-util.h @@ -0,0 +1,14 @@ +/* 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)) |