73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*
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* Copyright (C) 2015 Cloudius Systems, Ltd.
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*/
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#include "UUID.hh"
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#include "net/byteorder.hh"
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#include <random>
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#include <boost/iterator/function_input_iterator.hpp>
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#include <boost/algorithm/string.hpp>
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#include <string>
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#include "core/sstring.hh"
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#include "util/serialization.hh"
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#include "types.hh"
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namespace utils {
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UUID
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make_random_uuid() {
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// FIXME: keep in userspace
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static thread_local std::random_device urandom;
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static thread_local std::uniform_int_distribution<uint8_t> dist(0, 255);
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union {
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uint8_t b[16];
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struct {
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uint64_t msb, lsb;
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} w;
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} v;
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for (auto& b : v.b) {
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b = dist(urandom);
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}
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v.b[6] &= 0x0f;
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v.b[6] |= 0x40; // version 4
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v.b[8] &= 0x3f;
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v.b[8] |= 0x80; // IETF variant
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return UUID(net::hton(v.w.msb), net::hton(v.w.lsb));
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}
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std::ostream& operator<<(std::ostream& out, const UUID& uuid) {
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return out << uuid.to_sstring();
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}
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UUID::UUID(sstring_view uuid) {
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sstring uuid_string(uuid.begin(), uuid.end());
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boost::erase_all(uuid_string, "-");
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auto size = uuid_string.size() / 2;
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if (size != 16) {
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throw marshal_exception();
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}
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sstring most = sstring(uuid_string.begin(), uuid_string.begin() + size);
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sstring least = sstring(uuid_string.begin() + size, uuid_string.end());
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int base = 16;
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this->most_sig_bits = std::stoull(most, nullptr, base);
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this->least_sig_bits = std::stoull(least, nullptr, base);
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}
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void UUID::serialize(bytes::iterator& out) const {
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serialize_int64(out, most_sig_bits);
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serialize_int64(out, least_sig_bits);
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}
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UUID UUID::deserialize(bytes_view& v) {
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auto most = read_simple<int64_t>(v);
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auto least = read_simple<int64_t>(v);
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return UUID(most, least);
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}
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size_t UUID::serialized_size() const {
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return serialize_int64_size + serialize_int64_size;
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}
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}
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