Add BRemoveEngine

Similar to BCopyEngine, but it (surprise!) removes an entry.

headers/private/storage/RemoveEngine.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <[email protected]>
+ */
+#ifndef _REMOVE_ENGINE_H
+#define _REMOVE_ENGINE_H
+
+
+#include <stdarg.h>
+
+#include <EntryOperationEngineBase.h>
+
+
+namespace BPrivate {
+
+
+class BRemoveEngine : public BEntryOperationEngineBase {
+public:
+			class BController;
+
+public:
+								BRemoveEngine();
+								~BRemoveEngine();
+
+			BController*		Controller() const;
+			void				SetController(BController* controller);
+
+			status_t			RemoveEntry(const Entry& entry);
+
+private:
+			status_t			_RemoveEntry(const char* path);
+
+			void				_NotifyErrorVarArgs(status_t error,
+									const char* format, va_list args);
+			status_t			_HandleEntryError(const char* path,
+									status_t error, const char* format, ...);
+
+private:
+			BController*		fController;
+};
+
+
+class BRemoveEngine::BController {
+public:
+								BController();
+	virtual						~BController();
+
+	virtual	bool				EntryStarted(const char* path);
+	virtual	bool				EntryFinished(const char* path, status_t error);
+
+	virtual	void				ErrorOccurred(const char* message,
+									status_t error);
+};
+
+
+} // namespace BPrivate
+
+
+using ::BPrivate::BRemoveEngine;
+
+
+#endif	// _REMOVE_ENGINE_H