diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/7zip/UI/Common/UpdateProduce.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/UI/Common/UpdateProduce.cpp	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,63 @@
+// UpdateProduce.cpp
+
+#include "StdAfx.h"
+
+#include "UpdateProduce.h"
+
+using namespace NUpdateArchive;
+
+static const char *kUpdateActionSetCollision =
+    "Internal collision in update action set";
+
+void UpdateProduce(
+    const CObjectVector<CUpdatePair> &updatePairs,
+    const NUpdateArchive::CActionSet &actionSet,
+    CObjectVector<CUpdatePair2> &operationChain)
+{
+  for(int i = 0; i < updatePairs.Size(); i++)
+  {
+    // CUpdateArchiveRange aRange;
+    const CUpdatePair &pair = updatePairs[i];
+
+    CUpdatePair2 pair2;
+    pair2.IsAnti = false;
+    pair2.ArchiveItemIndex = pair.ArchiveItemIndex;
+    pair2.DirItemIndex = pair.DirItemIndex;
+    pair2.ExistInArchive = (pair.State != NPairState::kOnlyOnDisk);
+    pair2.ExistOnDisk = (pair.State != NPairState::kOnlyInArchive && pair.State != NPairState::kNotMasked);
+    switch(actionSet.StateActions[pair.State])
+    {
+      case NPairAction::kIgnore:
+        /*
+        if (pair.State != NPairState::kOnlyOnDisk)
+          IgnoreArchiveItem(m_ArchiveItems[pair.ArchiveItemIndex]);
+        // cout << "deleting";
+        */
+        break;
+      case NPairAction::kCopy:
+        {
+          if (pair.State == NPairState::kOnlyOnDisk)
+            throw kUpdateActionSetCollision;
+          pair2.NewData = pair2.NewProperties = false;
+          operationChain.Add(pair2);
+          break;
+        }
+      case NPairAction::kCompress:
+        {
+          if (pair.State == NPairState::kOnlyInArchive || 
+            pair.State == NPairState::kNotMasked)
+            throw kUpdateActionSetCollision;
+          pair2.NewData = pair2.NewProperties = true;
+          operationChain.Add(pair2);
+          break;
+        }
+      case NPairAction::kCompressAsAnti:
+        {
+          pair2.IsAnti = true;
+          pair2.NewData = pair2.NewProperties = true;
+          operationChain.Add(pair2);
+          break;
+        }
+    }
+  }
+}