From 45f7819aba9b25a4277d5ac2da31313f44f75e77 Mon Sep 17 00:00:00 2001
From: Daniel Larimer <dan@bitshares.org>
Date: Thu, 8 Oct 2015 13:40:01 -0400
Subject: [PATCH] adding some hashing methods to db for debugging

---
 libraries/db/include/graphene/db/flat_index.hpp    |  8 ++++++++
 libraries/db/include/graphene/db/generic_index.hpp | 13 ++++++++++++-
 libraries/db/include/graphene/db/index.hpp         |  1 +
 libraries/db/include/graphene/db/object.hpp        |  7 +++++++
 libraries/db/include/graphene/db/simple_index.hpp  |  7 +++++++
 5 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/libraries/db/include/graphene/db/flat_index.hpp b/libraries/db/include/graphene/db/flat_index.hpp
index 06eb3826..a2b7e036 100644
--- a/libraries/db/include/graphene/db/flat_index.hpp
+++ b/libraries/db/include/graphene/db/flat_index.hpp
@@ -87,6 +87,14 @@ namespace graphene { namespace db {
             } FC_CAPTURE_AND_RETHROW()
          }
 
+         virtual fc::uint128 hash()const override {
+            fc::uint128 result;
+            for( const auto& ptr : _objects )
+               result += ptr.hash();
+
+            return result;
+         }
+
          class const_iterator
          {
             public:
diff --git a/libraries/db/include/graphene/db/generic_index.hpp b/libraries/db/include/graphene/db/generic_index.hpp
index 837df43d..4a4ff71b 100644
--- a/libraries/db/include/graphene/db/generic_index.hpp
+++ b/libraries/db/include/graphene/db/generic_index.hpp
@@ -90,8 +90,19 @@ namespace graphene { namespace chain {
 
          const index_type& indices()const { return _indices; }
 
+         virtual fc::uint128 hash()const override {
+            fc::uint128 result;
+            for( const auto& ptr : _indices )
+            {
+               result += ptr.hash();
+            }
+
+            return result;
+         }
+
       private:
-         index_type _indices;
+         fc::uint128 _current_hash;
+         index_type  _indices;
    };
 
    /**
diff --git a/libraries/db/include/graphene/db/index.hpp b/libraries/db/include/graphene/db/index.hpp
index 514a79e5..6c175e20 100644
--- a/libraries/db/include/graphene/db/index.hpp
+++ b/libraries/db/include/graphene/db/index.hpp
@@ -122,6 +122,7 @@ namespace graphene { namespace db {
          }
 
          virtual void               inspect_all_objects(std::function<void(const object&)> inspector)const = 0;
+         virtual fc::uint128        hash()const = 0;
          virtual void               add_observer( const shared_ptr<index_observer>& ) = 0;
 
    };
diff --git a/libraries/db/include/graphene/db/object.hpp b/libraries/db/include/graphene/db/object.hpp
index 16ff3fba..94068f50 100644
--- a/libraries/db/include/graphene/db/object.hpp
+++ b/libraries/db/include/graphene/db/object.hpp
@@ -18,6 +18,8 @@
 #pragma once
 #include <graphene/db/object_id.hpp>
 #include <fc/io/raw.hpp>
+#include <fc/crypto/city.hpp>
+#include <fc/uint128.hpp>
 
 namespace graphene { namespace db {
 
@@ -67,6 +69,7 @@ namespace graphene { namespace db {
          virtual void               move_from( object& obj ) = 0;
          virtual variant            to_variant()const  = 0;
          virtual vector<char>       pack()const = 0;
+         virtual fc::uint128        hash()const = 0;
    };
 
    /**
@@ -91,6 +94,10 @@ namespace graphene { namespace db {
          }
          virtual variant to_variant()const { return variant( static_cast<const DerivedClass&>(*this) ); }
          virtual vector<char> pack()const  { return fc::raw::pack( static_cast<const DerivedClass&>(*this) ); }
+         virtual fc::uint128  hash()const  {  
+             auto tmp = this->pack();
+             return fc::city_hash_crc_128( tmp.data(), tmp.size() );
+         }
    };
 
    typedef flat_map<uint8_t, object_id_type> annotation_map;
diff --git a/libraries/db/include/graphene/db/simple_index.hpp b/libraries/db/include/graphene/db/simple_index.hpp
index 9c4b0742..9e0a612f 100644
--- a/libraries/db/include/graphene/db/simple_index.hpp
+++ b/libraries/db/include/graphene/db/simple_index.hpp
@@ -92,6 +92,13 @@ namespace graphene { namespace db {
                }
             } FC_CAPTURE_AND_RETHROW()
          }
+         virtual fc::uint128 hash()const override {
+            fc::uint128 result;
+            for( const auto& ptr : _objects )
+               result += ptr->hash();
+
+            return result;
+         }
 
          class const_iterator
          {