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diff --git a/utils/tfstats/regexp/include/jm/re_cls.h b/utils/tfstats/regexp/include/jm/re_cls.h
new file mode 100644
index 0000000..5dd8f8e
--- /dev/null
+++ b/utils/tfstats/regexp/include/jm/re_cls.h
@@ -0,0 +1,79 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+/*
+ *
+ * Copyright (c) 1998-9
+ * Dr John Maddock
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Dr John Maddock makes no representations
+ * about the suitability of this software for any purpose.  
+ * It is provided "as is" without express or implied warranty.
+ *
+ */
+ 
+ /*
+  *   FILE     re_cls.h
+  *   VERSION  2.12
+  *   This is an internal header file, do not include directly.
+  *   character class lookup, for regular
+  *   expression library.
+  */
+
+#ifndef RE_CLS_H
+#define RE_CLS_H
+
+#ifndef JM_CFG_H
+#include <jm/jm_cfg.h>
+#endif
+
+#ifndef RE_STR_H
+#include <jm/re_str.h>
+#endif
+
+JM_NAMESPACE(__JM)
+
+#define re_classes_max 14
+
+void RE_CALL re_init_classes();
+void RE_CALL re_free_classes();
+void RE_CALL re_update_classes();
+JM_IX_DECL jm_uintfast32_t RE_CALL __re_lookup_class(const char* p);
+
+inline jm_uintfast32_t RE_CALL re_lookup_class(const char* first, const char* last)
+{
+   re_str<char> s(first, last);
+   return __re_lookup_class(s.c_str());
+}
+
+#ifndef JM_NO_WCSTRING
+inline jm_uintfast32_t RE_CALL re_lookup_class(const wchar_t* first, const wchar_t* last)
+{
+   re_str<wchar_t> s(first, last);
+   unsigned int len = re_strnarrow((char*)NULL, 0, s.c_str());
+   auto_array<char> buf(new char[len]);
+   re_strnarrow((char*)buf, len, s.c_str());
+   len =  __re_lookup_class((char*)buf);
+   return len;
+}
+#endif
+
+#ifdef RE_LOCALE_CPP
+
+extern jm_uintfast32_t re_char_class_id[];
+extern const char* re_char_class_names[];
+
+#endif
+
+JM_END_NAMESPACE
+
+#endif
+