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diff --git a/CPP/7zip/Compress/PpmdType.h b/CPP/7zip/Compress/PpmdType.h
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+++ b/CPP/7zip/Compress/PpmdType.h
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+/****************************************************************************
+ *  This file is part of PPMd project                                       *
+ *  Written and distributed to public domain by Dmitry Shkarin 1997,        *
+ *  1999-2001                                                               *
+ *  Contents: compilation parameters and miscelaneous definitions           *
+ *  Comments: system & compiler dependent file
+ 
+ *  modified by Igor Pavlov (2004-08-29).
+ ****************************************************************************/
+
+#ifndef __COMPRESS_PPMD_TYPE_H
+#define __COMPRESS_PPMD_TYPE_H
+
+const int kMaxOrderCompress = 32;
+const int MAX_O = 255; /* maximum allowed model order */
+
+template <class T>
+inline void _PPMD_SWAP(T& t1,T& t2) { T tmp = t1; t1 = t2; t2 = tmp; }
+
+#endif