Add class BPathFinder

It's a more convenient C++ wrapper for the new find_path*() C functions.

headers/os/storage/PathFinder.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2013, Haiku Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _PATH_FINDER_H
+#define _PATH_FINDER_H
+
+
+#include <FindDirectory.h>
+#include <String.h>
+
+
+class BPath;
+class BStringList;
+struct entry_ref;
+
+
+class BPathFinder {
+public:
+								BPathFinder(const void* codePointer = NULL,
+									const char* dependency = NULL);
+								BPathFinder(const char* path,
+									const char* dependency = NULL);
+								BPathFinder(const entry_ref& ref,
+									const char* dependency = NULL);
+
+			status_t			SetTo(const void* codePointer = NULL,
+									const char* dependency = NULL);
+			status_t			SetTo(const char* path,
+									const char* dependency = NULL);
+			status_t			SetTo(const entry_ref& ref,
+									const char* dependency = NULL);
+
+			status_t			FindPath(path_base_directory baseDirectory,
+									const char* subPath, uint32 flags,
+									BPath& path);
+			status_t			FindPath(path_base_directory baseDirectory,
+									const char* subPath, BPath& path);
+			status_t			FindPath(path_base_directory baseDirectory,
+									BPath& path);
+
+	static	status_t			FindPaths(path_base_directory baseDirectory,
+									const char* subPath, uint32 flags,
+							 		BStringList& paths);
+	static	status_t			FindPaths(path_base_directory baseDirectory,
+									const char* subPath, BStringList& paths);
+	static	status_t			FindPaths(path_base_directory baseDirectory,
+									BStringList& paths);
+
+private:
+			status_t			_SetTo(const void* codePointer,
+									const char* path, const char* dependency);
+
+private:
+			const void*			fCodePointer;
+			BString				fPath;
+			BString				fDependency;
+			status_t			fInitStatus;
+			uint32				fReserved[4];
+};
+
+
+#endif	// _PATH_FINDER_H