Minor fixes

Author: geonove

ddsketch/include/ddsketch.hpp

@@ -96,7 +96,7 @@ class  DDSketch {
 
   vector_double get_PMF(const T* split_points, uint32_t size) const;
 
-  vector_double get_CDF(const T* split_pints, uint32_t size) const;
+  vector_double get_CDF(const T* split_points, uint32_t size) const;
 
 
   bool is_empty() const;

ddsketch/include/ddsketch_impl.hpp

@@ -146,7 +146,7 @@ double DDSketch<Store, Mapping>::get_rank(const double &item) const {
   double rank = 0.0;
 
   if (!negative_store.is_empty()) {
-    for (auto it = negative_store.rbegin(); it != negative_store.rend() && index_mapping.value((*it).get_index()) <= item; ++it) {
+    for (auto it = negative_store.rbegin(); it != negative_store.rend() && -index_mapping.value((*it).get_index()) <= item; ++it) {
       rank += (*it).get_count();
     }
   }

ddsketch/include/log_like_index_mapping.hpp

@@ -97,6 +97,10 @@ class LogLikeIndexMapping : public IndexMapping<Derived> {
    */
   void serialize(std::ostream& os) const;
 
+  int get_serialized_size_bytes() const {
+  return 16;
+}
+
   template<class A = std::allocator<char>>
   string<A> to_string() const;