1 files changed, 61 insertions, 0 deletions
diff --git a/Source/Editors/save_state.cpp b/Source/Editors/save_state.cpp
new file mode 100644
index 00000000..73701e65
--- /dev/null
+++ b/Source/Editors/save_state.cpp
@@ -0,0 +1,61 @@
+//-----------------------------------------------------------------------------
+//           Name: save_state.cpp
+//      Developer: Wolfire Games LLC
+//    Description: 
+//        License: Read below
+//-----------------------------------------------------------------------------
+//
+//
+//   Copyright 2022 Wolfire Games LLC
+//
+//   Licensed under the Apache License, Version 2.0 (the "License");
+//   you may not use this file except in compliance with the License.
+//   You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+//
+//-----------------------------------------------------------------------------
+#include "save_state.h"
+
+unsigned SavedChunk::global_chunk_id_counter = 1;
+
+SavedChunk::SavedChunk() : global_chunk_id(global_chunk_id_counter++)
+{
+
+}
+
+unsigned SavedChunk::GetGlobalID()
+{
+    return global_chunk_id;
+}
+
+void AddChunkToHistory(std::list<SavedChunk> &chunk_list, int state_id, SavedChunk &saved_chunk){
+    saved_chunk.state_id = state_id;
+    chunk_list.push_back(saved_chunk);
+}
+
+void StateHistory::clear() {
+    chunks.clear();
+    current_state = -1;
+    start_state = 0;
+    num_states = 0;;
+}
+
+std::list<SavedChunk>::iterator StateHistory::GetCurrentChunk()
+{
+    std::list<SavedChunk>::iterator chunkit = chunks.begin();
+    for( ; chunkit != chunks.end(); chunkit++ )
+    {
+        if( chunkit->state_id == current_state )
+        {
+            return chunkit;
+        }
+    }
+    return chunks.end();
+}