From e04c4c5eb6db16ea378364778f7b25a8366bc16e Mon Sep 17 00:00:00 2001
From: Sebastian Eibl <sebastian.eibl@fau.de>
Date: Mon, 8 Apr 2019 17:28:42 +0200
Subject: [PATCH] following standard for random uuids
---
src/core/RandomUUID.cpp | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/core/RandomUUID.cpp b/src/core/RandomUUID.cpp
index 659922e4f..a2e923398 100644
--- a/src/core/RandomUUID.cpp
+++ b/src/core/RandomUUID.cpp
@@ -35,6 +35,12 @@ RandomUUID::RandomUUID()
std::random_device rd2;
std::mt19937 gen2( rd2() );
b_ = dis(gen2);
+ //unsure how independent these two random numbers really are
+
+ //setting version numbers
+ //https://en.m.wikipedia.org/wiki/Universally_unique_identifier
+ a_ = ((a_ & 0xFFFFFFFFFFFF0FFF) | 0x0000000000004000);
+ b_ = ((b_ & 0x3FFFFFFFFFFFFFFF) | 0x8000000000000000);
}
RandomUUID::RandomUUID( const UIntType a, const UIntType b)
@@ -49,7 +55,7 @@ std::string RandomUUID::toString() const
<< std::setfill('0')
<< std::setw(8) << (a_ >> 32) << "-"
<< std::setw(4) << ((a_&0xFFFFFFFF)>>16) << "-"
- << std::setw(4) <<(a_&0xFFFF) << "-"
+ << std::setw(4) << (a_&0xFFFF) << "-"
<< std::setw(4) << (b_ >> 48) << "-"
<< std::setw(12) << (b_&0xFFFFFFFFFFFF);
return ss.str();
--
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