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diff --git a/Source/kwsys/Directory.hxx.in b/Source/kwsys/Directory.hxx.in
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+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
+#ifndef @KWSYS_NAMESPACE@_Directory_hxx
+#define @KWSYS_NAMESPACE@_Directory_hxx
+
+#include <@KWSYS_NAMESPACE@/Configure.h>
+
+#include <string>
+
+namespace @KWSYS_NAMESPACE@ {
+
+class DirectoryInternals;
+
+/** \class Directory
+ * \brief Portable directory/filename traversal.
+ *
+ * Directory provides a portable way of finding the names of the files
+ * in a system directory.
+ *
+ * Directory currently works with Windows and Unix operating systems.
+ */
+class @KWSYS_NAMESPACE@_EXPORT Directory
+{
+public:
+  Directory();
+  ~Directory();
+
+  /**
+   * Load the specified directory and load the names of the files
+   * in that directory. 0 is returned if the directory can not be
+   * opened, 1 if it is opened.
+   */
+  bool Load(const std::string&);
+
+  /**
+   * Return the number of files in the current directory.
+   */
+  unsigned long GetNumberOfFiles() const;
+
+  /**
+   * Return the number of files in the specified directory.
+   * A higher performance static method.
+   */
+  static unsigned long GetNumberOfFilesInDirectory(const std::string&);
+
+  /**
+   * Return the file at the given index, the indexing is 0 based
+   */
+  const char* GetFile(unsigned long) const;
+
+  /**
+   * Return the path to Open'ed directory
+   */
+  const char* GetPath() const;
+
+  /**
+   * Clear the internal structure. Used internally at beginning of Load(...)
+   * to clear the cache.
+   */
+  void Clear();
+
+private:
+  // Private implementation details.
+  DirectoryInternals* Internal;
+
+  Directory(const Directory&);      // Not implemented.
+  void operator=(const Directory&); // Not implemented.
+};                                  // End Class: Directory
+
+} // namespace @KWSYS_NAMESPACE@
+
+#endif