mirror of
https://github.com/ClickHouse/ClickHouse.git
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b79ead9c84
* Replicate poco into base/poco/ * De-register poco submodule * Build poco from ClickHouse * Exclude poco from stylecheck * Exclude poco from whitespace check * Exclude poco from typo check * Remove x bit from sources/headers (the style check complained) * Exclude poco from duplicate include check * Fix fasttest * Remove contrib/poco-cmake/* * Simplify poco build descriptions * Remove poco stuff not used by ClickHouse * Glob poco sources * Exclude poco from clang-tidy
106 lines
1.7 KiB
C++
106 lines
1.7 KiB
C++
//
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// Hash.h
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//
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// Library: Foundation
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// Package: Hashing
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// Module: Hash
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//
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// Definition of the Hash class.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_Hash_INCLUDED
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#define Foundation_Hash_INCLUDED
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#include "Poco/Foundation.h"
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#include <cstddef>
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namespace Poco {
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std::size_t Foundation_API hash(Int8 n);
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std::size_t Foundation_API hash(UInt8 n);
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std::size_t Foundation_API hash(Int16 n);
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std::size_t Foundation_API hash(UInt16 n);
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std::size_t Foundation_API hash(Int32 n);
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std::size_t Foundation_API hash(UInt32 n);
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std::size_t Foundation_API hash(Int64 n);
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std::size_t Foundation_API hash(UInt64 n);
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std::size_t Foundation_API hash(const std::string& str);
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template <class T>
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struct Hash
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/// A generic hash function.
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{
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std::size_t operator () (T value) const
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/// Returns the hash for the given value.
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{
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return Poco::hash(value);
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}
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};
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//
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// inlines
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//
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inline std::size_t hash(Int8 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(UInt8 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(Int16 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(UInt16 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(Int32 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(UInt32 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(Int64 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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inline std::size_t hash(UInt64 n)
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{
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return static_cast<std::size_t>(n)*2654435761U;
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}
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} // namespace Poco
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#endif // Foundation_Hash_INCLUDED
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