[2087] Add MessageRenderer::writeName() variant for LabelSequence

The Name tests are not repeated as the Name variant is a wrapper
around the LabelSequence variant. Such tests would be redundant.
Instead, tests for LabelSequence specific stripLeft(), stripRight()
were added.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/lib/dns/labelsequence.h b/src/lib/dns/labelsequence.h
index 019250e72c..398c9afad9 100644
--- a/src/lib/dns/labelsequence.h
+++ b/src/lib/dns/labelsequence.h
@@ -45,6 +45,23 @@ class LabelSequence {
     friend std::string Name::toText(bool) const;
 
 public:
+    /// \brief Constructs a LabelSequence for the given label sequence
+    ///
+    /// \note The associated data MUST remain in scope during the lifetime
+    /// of this LabelSequence, since only the pointers are copied.
+    ///
+    /// \note No validation is done on the given data upon construction;
+    ///       use with care.
+    ///
+    /// \param ls The LabelSequence to construct a LabelSequence from
+    explicit LabelSequence(const LabelSequence& ls):
+                                     data_(ls.data_),
+                                     offsets_(ls.offsets_),
+                                     offsets_size_(ls.offsets_size_),
+                                     first_label_(ls.first_label_),
+                                     last_label_(ls.last_label_)
+    {}
+
     /// \brief Constructs a LabelSequence for the given name
     ///
     /// \note The associated Name MUST remain in scope during the lifetime