1 files changed, 13 insertions, 0 deletions
diff --git a/src/mongo/util/bufreader.h b/src/mongo/util/bufreader.h
index 8c30070bada..b8d931add9a 100644
--- a/src/mongo/util/bufreader.h
+++ b/src/mongo/util/bufreader.h
@@ -106,6 +106,11 @@ public:
         invariant(_pos >= _start);
     }
 
+    /** back up to beginging of buffer */
+    void rewindToStart() {
+        _pos = _start;
+    }
+
     /** return current position pointer, and advance by len */
     const void* skip(unsigned len) {
         ConstDataRangeCursor cdrc(_pos, _end);
@@ -124,6 +129,14 @@ public:
         s = readCStr().toString();
     }
 
+    /**
+     * Return a view of the next len bytes and advance by len.
+     */
+    StringData readBytes(size_t len) {
+        // Note: the call to skip() includes a check that at least 'len' bytes remain in the buffer.
+        return StringData(reinterpret_cast<const char*>(skip(len)), len);
+    }
+
     const void* pos() {
         return _pos;
     }