use random_access_file for ship log; refactor catalog

libraries/state_history/CMakeLists.txt

@@ -2,7 +2,6 @@ file(GLOB HEADERS "include/eosio/state-history/*.hpp")
 
 add_library( state_history
              abi.cpp
-             compression.cpp
              create_deltas.cpp
              trace_converter.cpp
              ${HEADERS}

libraries/state_history/include/eosio/state_history/counter.hpp

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <boost/iostreams/filtering_streambuf.hpp>
+
+namespace eosio::detail {
+
+namespace bio = boost::iostreams;
+
+// directly adapt from boost/iostreams/filter/counter.hpp and change the type of chars_ to uint64_t.
+class counter  {
+public:
+    typedef char char_type;
+    struct category
+        : bio::dual_use,
+          bio::filter_tag,
+          bio::multichar_tag,
+          bio::optimally_buffered_tag
+        { };
+
+    uint64_t characters() const { return chars_; }
+    std::streamsize optimal_buffer_size() const { return 64*1024; }
+
+    template<typename Source>
+    std::streamsize read(Source& src, char_type* s, std::streamsize n)
+    {
+        std::streamsize result = bio::read(src, s, n);
+        if (result == -1)
+            return -1;
+        chars_ += result;
+        return result;
+    }
+
+    template<typename Sink>
+    std::streamsize write(Sink& snk, const char_type* s, std::streamsize n)
+    {
+        std::streamsize result = bio::write(snk, s, n);
+        chars_ += result;
+        return result;
+    }
+
+private:
+    uint64_t chars_ = 0;
+};
+BOOST_IOSTREAMS_PIPABLE(counter, 0)
+
+}