Add LZMA.

3rdparty/lzma-21.03beta/CPP/7zip/UI/Common/UpdatePair.h

@@ -0,0 +1,27 @@
+// UpdatePair.h
+
+#ifndef __UPDATE_PAIR_H
+#define __UPDATE_PAIR_H
+
+#include "DirItem.h"
+#include "UpdateAction.h"
+
+#include "../../Archive/IArchive.h"
+
+struct CUpdatePair
+{
+  NUpdateArchive::NPairState::EEnum State;
+  int ArcIndex;
+  int DirIndex;
+  int HostIndex; // >= 0 for alt streams only, contains index of host pair
+
+  CUpdatePair(): ArcIndex(-1), DirIndex(-1), HostIndex(-1) {}
+};
+
+void GetUpdatePairInfoList(
+    const CDirItems &dirItems,
+    const CObjectVector<CArcItem> &arcItems,
+    NFileTimeType::EEnum fileTimeType,
+    CRecordVector<CUpdatePair> &updatePairs);
+
+#endif