Helper class: Represents a loaded add-on image.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2797 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/storage/AddOnImage.cpp

@@ -0,0 +1,54 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+
+#include "AddOnImage.h"
+
+// constructor
+AddOnImage::AddOnImage()
+	: fID(-1)
+{
+}
+
+// destructor
+AddOnImage::~AddOnImage()
+{
+	Unload();
+}
+
+// Load
+status_t
+AddOnImage::Load(const char *path)
+{
+	Unload();
+	status_t error = (path ? B_OK : B_BAD_VALUE);
+	if (error == B_OK) {
+		image_id id = load_add_on(path);
+		if (id >= 0)
+			fID = id;
+		else
+			error = id;
+	}
+	return error;
+}
+
+// Unload
+void
+AddOnImage::Unload()
+{
+	if (fID >= 0) {
+		unload_add_on(fID);
+		fID = -1;
+	}
+}
+
+// SetID
+void
+AddOnImage::SetID(image_id id)
+{
+	Unload();
+	if (id >= 0)
+		fID = id;
+}
+

src/kits/storage/AddOnImage.h

@@ -0,0 +1,32 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+
+#ifndef _ADD_ON_IMAGE_H
+#define _ADD_ON_IMAGE_H
+
+#include <image.h>
+
+namespace BPrivate {
+
+class AddOnImage {
+public:
+	AddOnImage();
+	~AddOnImage();
+
+	status_t Load(const char *path);
+	void Unload();
+
+	void SetID(image_id id);
+	image_id ID() const	{ return fID; }
+
+private:
+	image_id	fID;
+};
+
+}	// namespace BPrivate
+
+using BPrivate::AddOnImage;
+
+#endif	// _ADD_ON_IMAGE_H