From 78052771af75f9c6fdff10796c82a38167274a6f Mon Sep 17 00:00:00 2001
From: Geert Bosch <geert@mongodb.com>
Date: Thu, 2 Mar 2017 14:07:32 -0500
Subject: SERVER-27987 Create and persist UUIDs for newly created collections

---
 src/mongo/bson/bsonelement.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/mongo/bson/bsonelement.h')

diff --git a/src/mongo/bson/bsonelement.h b/src/mongo/bson/bsonelement.h
index 111cbad442f..3120907b589 100644
--- a/src/mongo/bson/bsonelement.h
+++ b/src/mongo/bson/bsonelement.h
@@ -579,6 +579,17 @@ public:
         return Timestamp();
     }
 
+    const std::array<unsigned char, 16> uuid() const {
+        int len = 0;
+        const char* data = nullptr;
+        if (type() == BinData && binDataType() == BinDataType::newUUID)
+            data = binData(len);
+        uassert(00000, "uuid must be a 16-byte binary field with UUID (4) subtype", len == 16);
+        std::array<unsigned char, 16> result;
+        memcpy(&result, data, len);
+        return result;
+    }
+
     Date_t timestampTime() const {
         unsigned long long t = ConstDataView(value() + 4).read<LittleEndian<unsigned int>>();
         return Date_t::fromMillisSinceEpoch(t * 1000);
-- 
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