NaN-safe comparison and hashing

commit_hash:46d59ab3acbd313753d3e46f3a6f10a8ebc424d8

1 files changed, 31 insertions, 0 deletions

diff --git a/library/cpp/yt/misc/numeric_helpers.h b/library/cpp/yt/misc/numeric_helpers.h
new file mode 100644
index 0000000000..20844029c2
--- /dev/null
+++ b/library/cpp/yt/misc/numeric_helpers.h
@@ -0,0 +1,31 @@
+#pragma once
+
+namespace NYT {
+
+////////////////////////////////////////////////////////////////////////////////
+
+template <class T>
+T DivCeil(const T& numerator, const T& denominator);
+
+//! A version of division that is a bit less noisy around the situation
+//! when numerator is almost divisible by denominator. Round up if the remainder
+//! is at least half of denominator, otherwise round down.
+template<class T>
+T DivRound(const T& numerator, const T& denominator);
+
+template <class T>
+T RoundUp(const T& numerator, const T& denominator);
+
+template <class T>
+T RoundDown(const T& numerator, const T& denominator);
+
+template <class T>
+int GetSign(const T& value);
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NYT
+
+#define NUMERIC_HELPERS_INL_H_
+#include "numeric_helpers-inl.h"
+#undef NUMERIC_HELPERS_INL_H_