[2052] Add implementation and unit tests for dns::LabelSequence::compare()

1 files changed, 25 insertions, 1 deletions

diff --git a/src/lib/dns/name.h b/src/lib/dns/name.h
index ef32f90d7b..4e7564f4f9 100644
--- a/src/lib/dns/name.h
+++ b/src/lib/dns/name.h
@@ -142,7 +142,8 @@ public:
         SUPERDOMAIN = 0,
         SUBDOMAIN = 1,
         EQUAL = 2,
-        COMMONANCESTOR = 3
+        COMMONANCESTOR = 3,
+        NONE = 4
     };
 
     ///
@@ -399,6 +400,29 @@ public:
     /// comparison result.
     NameComparisonResult compare(const Name& other) const;
 
+private:
+    /// \brief Partially compare two <code>Name</code>s.
+    ///
+    /// This method performs a partial comparison of the
+    /// <code>Name</code> and <code>other</code> and returns the result
+    /// in the form of a <code>NameComparisonResult</code> object.
+    ///
+    /// This method never throws an exception.
+    ///
+    /// \param other the right-hand operand to compare against.
+    /// \param first_label the leftmost label of <code>Name</code> to
+    /// begin comparing from.
+    /// \param first_label_other the leftmost label of
+    /// <code>other</code> to begin comparing from.
+    /// \param case_sensitive If true, comparison is case-insensitive
+    /// \return a <code>NameComparisonResult</code> object representing the
+    /// comparison result.
+    NameComparisonResult partial_compare(const Name& other,
+                                         unsigned int first_label,
+                                         unsigned int first_label_other,
+                                         bool case_sensitive = false) const;
+
+public:
     /// \brief Return true iff two names are equal.
     ///
     /// Semantically this could be implemented based on the result of the