kopia lustrzana https://github.com/jameshball/osci-render
77 wiersze
1.6 KiB
C++
77 wiersze
1.6 KiB
C++
/*
|
|
* IXUuid.cpp
|
|
* Author: Benjamin Sergeant
|
|
* Copyright (c) 2018 Machine Zone. All rights reserved.
|
|
*/
|
|
|
|
/**
|
|
* Generate a random uuid similar to the uuid python module
|
|
*
|
|
* >>> import uuid
|
|
* >>> uuid.uuid4().hex
|
|
* 'bec08155b37d4050a1f3c3fa0276bf12'
|
|
*
|
|
* Code adapted from https://github.com/r-lyeh-archived/sole
|
|
*/
|
|
|
|
#include "IXUuid.h"
|
|
|
|
#include <cstdint>
|
|
#include <iomanip>
|
|
#include <random>
|
|
#include <sstream>
|
|
#include <string>
|
|
|
|
|
|
namespace ix
|
|
{
|
|
class Uuid
|
|
{
|
|
public:
|
|
Uuid();
|
|
std::string toString() const;
|
|
|
|
private:
|
|
uint64_t _ab;
|
|
uint64_t _cd;
|
|
};
|
|
|
|
Uuid::Uuid()
|
|
{
|
|
static std::random_device rd;
|
|
static std::uniform_int_distribution<uint64_t> dist(0, (uint64_t)(~0));
|
|
|
|
_ab = dist(rd);
|
|
_cd = dist(rd);
|
|
|
|
_ab = (_ab & 0xFFFFFFFFFFFF0FFFULL) | 0x0000000000004000ULL;
|
|
_cd = (_cd & 0x3FFFFFFFFFFFFFFFULL) | 0x8000000000000000ULL;
|
|
}
|
|
|
|
std::string Uuid::toString() const
|
|
{
|
|
std::stringstream ss;
|
|
ss << std::hex << std::nouppercase << std::setfill('0');
|
|
|
|
uint32_t a = (_ab >> 32);
|
|
uint32_t b = (_ab & 0xFFFFFFFF);
|
|
uint32_t c = (_cd >> 32);
|
|
uint32_t d = (_cd & 0xFFFFFFFF);
|
|
|
|
ss << std::setw(8) << (a);
|
|
ss << std::setw(4) << (b >> 16);
|
|
ss << std::setw(4) << (b & 0xFFFF);
|
|
ss << std::setw(4) << (c >> 16);
|
|
ss << std::setw(4) << (c & 0xFFFF);
|
|
ss << std::setw(8) << d;
|
|
|
|
return ss.str();
|
|
}
|
|
|
|
std::string uuid4()
|
|
{
|
|
Uuid id;
|
|
return id.toString();
|
|
}
|
|
} // namespace ix
|