boost/uuid/uuid.hpp
// Boost uuid.hpp header file ----------------------------------------------// // Copyright 2006 Andy Tompkins. // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // Revision History // 06 Feb 2006 - Initial Revision // 09 Nov 2006 - fixed variant and version bits for v4 guids // 13 Nov 2006 - added serialization // 17 Nov 2006 - added name-based guid creation // 20 Nov 2006 - add fixes for gcc (from Tim Blechmann) // 07 Mar 2007 - converted to header only // 10 May 2007 - removed need for Boost.Thread // - added better seed - thanks Peter Dimov // - removed null() // - replaced byte_count() and output_bytes() with size() and begin() and end() // 11 May 2007 - fixed guid(ByteInputIterator first, ByteInputIterator last) // - optimized operator>> // 14 May 2007 - converted from guid to uuid // 29 May 2007 - uses new implementation of sha1 // 01 Jun 2007 - removed using namespace directives // 09 Nov 2007 - moved implementation to uuid.ipp file // 12 Nov 2007 - moved serialize code to uuid_serialize.hpp file // 25 Feb 2008 - moved to namespace boost::uuids // 19 Mar 2009 - changed to a POD, reorganized files // 28 Nov 2009 - disabled deprecated warnings for MSVC // 30 Nov 2009 - used BOOST_STATIC_CONSTANT // 02 Dec 2009 - removed BOOST_STATIC_CONSTANT - not all compilers like it // 29 Apr 2013 - added support for noexcept and constexpr, added optimizations for SSE/AVX #ifndef BOOST_UUID_HPP #define BOOST_UUID_HPP #include <cstddef> #include <boost/cstdint.hpp> #include <boost/uuid/detail/config.hpp> #ifndef BOOST_UUID_NO_TYPE_TRAITS #include <boost/type_traits/is_pod.hpp> #include <boost/type_traits/integral_constant.hpp> #endif #ifdef BOOST_HAS_PRAGMA_ONCE #pragma once #endif #if defined(_MSC_VER) #pragma warning(push) // Save warning settings. #pragma warning(disable : 4996) // Disable deprecated std::swap_ranges, std::equal #endif #ifdef BOOST_NO_STDC_NAMESPACE namespace std { using ::size_t; using ::ptrdiff_t; } //namespace std #endif //BOOST_NO_STDC_NAMESPACE namespace boost { namespace uuids { struct uuid { public: typedef uint8_t value_type; typedef uint8_t& reference; typedef uint8_t const& const_reference; typedef uint8_t* iterator; typedef uint8_t const* const_iterator; typedef std::size_t size_type; typedef std::ptrdiff_t difference_type; // This does not work on some compilers // They seem to want the variable definec in // a cpp file //BOOST_STATIC_CONSTANT(size_type, static_size = 16); static BOOST_CONSTEXPR size_type static_size() BOOST_NOEXCEPT { return 16; } public: iterator begin() BOOST_NOEXCEPT { return data; } const_iterator begin() const BOOST_NOEXCEPT { return data; } iterator end() BOOST_NOEXCEPT { return data+size(); } const_iterator end() const BOOST_NOEXCEPT { return data+size(); } BOOST_CONSTEXPR size_type size() const BOOST_NOEXCEPT { return static_size(); } bool is_nil() const BOOST_NOEXCEPT; enum variant_type { variant_ncs, // NCS backward compatibility variant_rfc_4122, // defined in RFC 4122 document variant_microsoft, // Microsoft Corporation backward compatibility variant_future // future definition }; variant_type variant() const BOOST_NOEXCEPT { // variant is stored in octet 7 // which is index 8, since indexes count backwards unsigned char octet7 = data[8]; // octet 7 is array index 8 if ( (octet7 & 0x80) == 0x00 ) { // 0b0xxxxxxx return variant_ncs; } else if ( (octet7 & 0xC0) == 0x80 ) { // 0b10xxxxxx return variant_rfc_4122; } else if ( (octet7 & 0xE0) == 0xC0 ) { // 0b110xxxxx return variant_microsoft; } else { //assert( (octet7 & 0xE0) == 0xE0 ) // 0b111xxxx return variant_future; } } enum version_type { version_unknown = -1, version_time_based = 1, version_dce_security = 2, version_name_based_md5 = 3, version_random_number_based = 4, version_name_based_sha1 = 5 }; version_type version() const BOOST_NOEXCEPT { // version is stored in octet 9 // which is index 6, since indexes count backwards uint8_t octet9 = data[6]; if ( (octet9 & 0xF0) == 0x10 ) { return version_time_based; } else if ( (octet9 & 0xF0) == 0x20 ) { return version_dce_security; } else if ( (octet9 & 0xF0) == 0x30 ) { return version_name_based_md5; } else if ( (octet9 & 0xF0) == 0x40 ) { return version_random_number_based; } else if ( (octet9 & 0xF0) == 0x50 ) { return version_name_based_sha1; } else { return version_unknown; } } // note: linear complexity void swap(uuid& rhs) BOOST_NOEXCEPT; public: // or should it be array<uint8_t, 16> uint8_t data[16]; }; bool operator== (uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT; bool operator< (uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT; inline bool operator!=(uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT { return !(lhs == rhs); } inline bool operator>(uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT { return rhs < lhs; } inline bool operator<=(uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT { return !(rhs < lhs); } inline bool operator>=(uuid const& lhs, uuid const& rhs) BOOST_NOEXCEPT { return !(lhs < rhs); } inline void swap(uuid& lhs, uuid& rhs) BOOST_NOEXCEPT { lhs.swap(rhs); } // This is equivalent to boost::hash_range(u.begin(), u.end()); inline std::size_t hash_value(uuid const& u) BOOST_NOEXCEPT { std::size_t seed = 0; for(uuid::const_iterator i=u.begin(), e=u.end(); i != e; ++i) { seed ^= static_cast<std::size_t>(*i) + 0x9e3779b9 + (seed << 6) + (seed >> 2); } return seed; } }} //namespace boost::uuids #ifndef BOOST_UUID_NO_TYPE_TRAITS // type traits specializations namespace boost { template <> struct is_pod<uuids::uuid> : true_type {}; } // namespace boost #endif #if defined(BOOST_UUID_USE_SSE2) #include <boost/uuid/detail/uuid_x86.hpp> #else #include <boost/uuid/detail/uuid_generic.hpp> #endif #if defined(_MSC_VER) #pragma warning(pop) // Restore warnings to previous state. #endif #endif // BOOST_UUID_HPP