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124 lines
3.5 KiB
C++
124 lines
3.5 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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// Original file Copyright Crytek GMBH or its affiliates, used under license.
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// Description : Part of CryEngine's extension framework.
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#ifndef CRYINCLUDE_CRYEXTENSION_CRYGUID_H
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#define CRYINCLUDE_CRYEXTENSION_CRYGUID_H
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#pragma once
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#include "Serialization/IArchive.h"
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#include "Random.h"
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#include <functional>
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struct CryGUID
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{
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uint64 hipart;
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uint64 lopart;
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// !!! Do NOT turn CryGUID into a non-aggregate !!!
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// It will prevent inlining and type list unrolling opportunities within
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// cryinterface_cast<T>() and cryiidof<T>(). As such prevent constructors,
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// non-public members, base classes and virtual functions!
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//CryGUID() : hipart(0), lopart(0) {}
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//CryGUID(uint64 h, uint64 l) : hipart(h), lopart(l) {}
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static CryGUID Construct(const uint64& hipart, const uint64& lopart)
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{
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CryGUID guid = {hipart, lopart};
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return guid;
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}
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static CryGUID Create()
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{
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uint64 lopart = 0;
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uint64 hipart = 0;
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while (lopart == 0 || hipart == 0)
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{
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const uint32 a = cry_random_uint32();
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const uint32 b = cry_random_uint32();
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const uint32 c = cry_random_uint32();
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const uint32 d = cry_random_uint32();
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lopart = (uint64)a | ((uint64)b << 32);
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hipart = (uint64)c | ((uint64)d << 32);
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}
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return Construct(lopart, hipart);
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}
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static CryGUID Null()
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{
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return Construct(0, 0);
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}
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bool operator ==(const CryGUID& rhs) const {return hipart == rhs.hipart && lopart == rhs.lopart; }
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bool operator !=(const CryGUID& rhs) const {return hipart != rhs.hipart || lopart != rhs.lopart; }
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bool operator <(const CryGUID& rhs) const {return hipart == rhs.hipart ? lopart < rhs.lopart : hipart < rhs.hipart; }
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void Serialize(Serialization::IArchive& ar)
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{
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if (ar.IsInput())
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{
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uint32 dwords[4];
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ar(dwords, "guid");
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lopart = (((uint64)dwords[1]) << 32) | (uint64)dwords[0];
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hipart = (((uint64)dwords[3]) << 32) | (uint64)dwords[2];
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}
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else
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{
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uint32 guid[4] = {
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(uint32)(lopart & 0xFFFFFFFF), (uint32)((lopart >> 32) & 0xFFFFFFFF),
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(uint32)(hipart & 0xFFFFFFFF), (uint32)((hipart >> 32) & 0xFFFFFFFF)
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};
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ar(guid, "guid");
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}
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}
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};
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// This is only used by the editor where we use C++ 11.
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namespace std
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{
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template<>
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struct hash<CryGUID>
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{
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public:
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size_t operator()(const CryGUID& guid) const
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{
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std::hash<uint64> hasher;
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return hasher(guid.lopart) ^ hasher(guid.hipart);
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}
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};
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}
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namespace AZStd
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{
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template<>
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struct hash<CryGUID>
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{
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public:
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size_t operator()(const CryGUID& guid) const
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{
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std::hash<CryGUID> hasher;
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return hasher(guid);
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}
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};
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}
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#define MAKE_CRYGUID(high, low) CryGUID::Construct((uint64) high##LL, (uint64) low##LL)
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#endif // CRYINCLUDE_CRYEXTENSION_CRYGUID_H
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