Add RangeSet serialization

src/ripple/basics/RangeSet.h

@@ -24,6 +24,7 @@
 #include <boost/optional.hpp>
 #include <boost/icl/closed_interval.hpp>
 #include <boost/icl/interval_set.hpp>
+#include <boost/serialization/split_free.hpp>
 
 namespace ripple
 {
@@ -128,5 +129,72 @@ prevMissing(RangeSet<T> const & rs, T t, T minVal = 0)
         return boost::none;
     return boost::icl::last(tgt);
 }
- }  // namespace ripple
+}  // namespace ripple
+
+
+// The boost serialization documents recommended putting free-function helpers
+// in the boost serialization namespace
+
+namespace boost {
+namespace serialization {
+template <class Archive, class T>
+void
+save(Archive& ar,
+    ripple::ClosedInterval<T> const& ci,
+    const unsigned int version)
+{
+    ar << ci.lower() << ci.upper();
+}
+
+template <class Archive, class T>
+void
+load(Archive& ar, ripple::ClosedInterval<T>& ci, const unsigned int version)
+{
+    T low, up;
+    ar >> low >> up;
+    ci = ripple::ClosedInterval<T>{low, up};
+}
+
+template <class Archive, class T>
+void
+serialize(Archive& ar,
+    ripple::ClosedInterval<T>& ci,
+    const unsigned int version)
+{
+    split_free(ar, ci, version);
+}
+
+template <class Archive, class T>
+void
+save(Archive& ar, ripple::RangeSet<T> const& rs, const unsigned int version)
+{
+    ar << rs.iterative_size();
+    for (auto const& r : rs)
+        ar << r;
+}
+
+template <class Archive, class T>
+void
+load(Archive& ar, ripple::RangeSet<T>& rs, const unsigned int version)
+{
+    rs.clear();
+    std::size_t intervals;
+    ar >> intervals;
+    for (std::size_t i = 0; i < intervals; ++i)
+    {
+        ripple::ClosedInterval<T> ci;
+        ar >> ci;
+        rs.insert(ci);
+    }
+}
+
+template <class Archive, class T>
+void
+serialize(Archive& ar, ripple::RangeSet<T>& rs, const unsigned int version)
+{
+    split_free(ar, rs, version);
+}
+
+}  // serialization
+}  // boost
 #endif

src/test/basics/RangeSet_test.cpp

@@ -20,6 +20,8 @@
 #include <BeastConfig.h>
 #include <ripple/basics/RangeSet.h>
 #include <ripple/beast/unit_test.h>
+#include <boost/archive/binary_iarchive.hpp>
+#include <boost/archive/binary_oarchive.hpp>
 
 namespace ripple
 {
@@ -75,11 +77,41 @@ public:
         set.erase(range(4u, 5u));
         BEAST_EXPECT(to_string(set) == "1-2,6");
     }
+
+    void
+    testSerialization()
+    {
+
+        auto works = [](RangeSet<std::uint32_t> const & orig)
+        {
+            std::stringstream ss;
+            boost::archive::binary_oarchive oa(ss);
+            oa << orig;
+
+            boost::archive::binary_iarchive ia(ss);
+            RangeSet<std::uint32_t> deser;
+            ia >> deser;
+
+            return orig == deser;
+        };
+
+        RangeSet<std::uint32_t> rs;
+
+        BEAST_EXPECT(works(rs));
+
+        rs.insert(3);
+        BEAST_EXPECT(works(rs));
+
+        rs.insert(range(7u, 10u));
+        BEAST_EXPECT(works(rs));
+
+    }
     void
     run()
     {
         testPrevMissing();
         testToString();
+        testSerialization();
     }
 };