forked from boostorg/beast
Vinnie Falco
7382a0c142
* Make LessThan private * Make NodeObject::isSame private * Remove hotTRANSACTION * Remove some Serializer members * Remove unused SHAMapItem::getRaw * Remove unused STLedgerEntry::getOwners * Remove Serializer constructors * Remove unused Serializer members * Remove SerialIter ctor
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2014, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_HASH_XXHASHER_H_INCLUDED
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#define BEAST_HASH_XXHASHER_H_INCLUDED
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#ifndef BEAST_NO_XXHASH
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#define BEAST_NO_XXHASH 0
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#endif
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#if ! BEAST_NO_XXHASH
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#include <beast/hash/endian.h>
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#include <beast/hash/impl/xxhash.h>
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#include <beast/utility/noexcept.h>
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#include <beast/cxx14/type_traits.h> // <type_traits>
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#include <cstddef>
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namespace beast {
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class xxhasher
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{
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private:
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// requires 64-bit std::size_t
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static_assert(sizeof(std::size_t)==8, "");
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detail::XXH64_state_t state_;
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public:
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using result_type = std::size_t;
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static beast::endian const endian = beast::endian::native;
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xxhasher() noexcept
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{
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detail::XXH64_reset (&state_, 1);
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}
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template <class Seed,
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std::enable_if_t<
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std::is_unsigned<Seed>::value>* = nullptr>
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explicit
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xxhasher (Seed seed)
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{
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detail::XXH64_reset (&state_, seed);
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}
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template <class Seed,
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std::enable_if_t<
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std::is_unsigned<Seed>::value>* = nullptr>
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xxhasher (Seed seed, Seed)
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{
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detail::XXH64_reset (&state_, seed);
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}
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void
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operator()(void const* key, std::size_t len) noexcept
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{
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detail::XXH64_update (&state_, key, len);
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}
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explicit
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operator std::size_t() noexcept
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{
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return detail::XXH64_digest(&state_);
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}
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};
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} // beast
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#endif
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#endif
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