fix calc_sever print_status npe bug (#387)

* fix calc_sever print_status npe bug

* fix: one line is out of limit

Co-authored-by: tianjian <tianjian@ezoodb.com>

.gitignore

@@ -13,4 +13,6 @@ nbproject/
 *.pdb
 *.exe
 *.ilk
-*.lib
+*.lib
+.idea
+cmake-build*

CMakeLists.txt

@@ -85,8 +85,12 @@ if (NOT WIN32)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
     if (APPLE)
-        include_directories(BEFORE /usr/local/opt/openssl/include)
-        link_directories(/usr/local/opt/openssl/lib)
+        include_directories(BEFORE
+                /usr/local/opt/openssl/include
+                )
+        link_directories(
+                /usr/local/opt/openssl/lib
+                )
     else()
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
     endif ()

examples/calculator/calc_server.cxx

@@ -152,9 +152,11 @@ void print_status(const std::string& cmd,
         << "current term: "
             << stuff.raft_instance_->get_term() << std::endl
         << "last snapshot log index: "
-            << stuff.sm_->last_snapshot()->get_last_log_idx() << std::endl
+            << (stuff.sm_->last_snapshot()
+                ? stuff.sm_->last_snapshot()->get_last_log_idx() : 0) << std::endl
         << "last snapshot log term: "
-            << stuff.sm_->last_snapshot()->get_last_log_term() << std::endl
+            << (stuff.sm_->last_snapshot()
+                ? stuff.sm_->last_snapshot()->get_last_log_term() : 0) << std::endl
         << "state machine value: "
             << get_sm()->get_current_value() << std::endl;
 }