Alessandro Bonazzi
6228f7494c
Files correlati : xvaga.dll Commento : , xvaga ; aggiunte xvt_fsys_files_remove, xvt_fsys_files_copy, xvt_GUID e xvt_fsys_get_sys_dir
151 lines
3.9 KiB
C++
151 lines
3.9 KiB
C++
/*
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The MIT License (MIT)
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Copyright (c) 2014 Graeme Hill (http://graemehill.ca)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#pragma once
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#define GUID_WINDOWS
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#ifdef GUID_ANDROID
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#include <thread>
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#include <jni.h>
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#endif
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#include <functional>
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#include <iostream>
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#include <array>
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#include <sstream>
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#include <string_view>
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#include <utility>
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#include <iomanip>
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#define BEGIN_XG_NAMESPACE namespace xg {
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#define END_XG_NAMESPACE }
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BEGIN_XG_NAMESPACE
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// Class to represent a GUID/UUID. Each instance acts as a wrapper around a
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// 16 byte value that can be passed around by value. It also supports
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// conversion to string (via the stream operator <<) and conversion from a
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// string via constructor.
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class Guid
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{
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public:
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explicit Guid(const std::array<unsigned char, 16> &bytes);
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explicit Guid(std::array<unsigned char, 16> &&bytes);
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// explicit Guid(std::string_view fromString);
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Guid();
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Guid(const Guid &other) = default;
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Guid &operator=(const Guid &other) = default;
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Guid(Guid &&other) = default;
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Guid &operator=(Guid &&other) = default;
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bool operator==(const Guid &other) const;
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bool operator!=(const Guid &other) const;
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std::string str() const;
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operator std::string() const;
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const std::array<unsigned char, 16>& bytes() const;
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void swap(Guid &other);
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bool isValid() const;
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private:
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void zeroify();
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// actual data
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std::array<unsigned char, 16> _bytes;
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// make the << operator a friend so it can access _bytes
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friend std::ostream &operator<<(std::ostream &s, const Guid &guid);
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friend bool operator<(const Guid &lhs, const Guid &rhs);
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};
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Guid newGuid();
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#ifdef GUID_ANDROID
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struct AndroidGuidInfo
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{
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static AndroidGuidInfo fromJniEnv(JNIEnv *env);
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JNIEnv *env;
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jclass uuidClass;
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jmethodID newGuidMethod;
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jmethodID mostSignificantBitsMethod;
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jmethodID leastSignificantBitsMethod;
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std::thread::id initThreadId;
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};
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extern AndroidGuidInfo androidInfo;
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void initJni(JNIEnv *env);
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// overloading for multi-threaded calls
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Guid newGuid(JNIEnv *env);
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#endif
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namespace details
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{
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template <typename...> struct hash;
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template<typename T>
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struct hash<T> : public std::hash<T>
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{
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using std::hash<T>::hash;
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};
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template <typename T, typename... Rest>
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struct hash<T, Rest...>
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{
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inline std::size_t operator()(const T& v, const Rest&... rest) {
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std::size_t seed = hash<Rest...>{}(rest...);
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seed ^= hash<T>{}(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
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return seed;
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}
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};
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}
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END_XG_NAMESPACE
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namespace std
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{
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// Template specialization for std::swap<Guid>() --
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// See guid.cpp for the function definition
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template <>
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void swap(xg::Guid &guid0, xg::Guid &guid1) noexcept;
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// Specialization for std::hash<Guid> -- this implementation
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// uses std::hash<std::string> on the stringification of the guid
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// to calculate the hash
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template <>
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struct hash<xg::Guid>
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{
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std::size_t operator()(xg::Guid const &guid) const
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{
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const uint64_t* p = reinterpret_cast<const uint64_t*>(guid.bytes().data());
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return xg::details::hash<uint64_t, uint64_t>{}(p[0], p[1]);
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}
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};
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}
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