1 files changed, 54 insertions, 0 deletions
diff --git a/include/swobject.h b/include/swobject.h
new file mode 100644
index 0000000..567405b
--- /dev/null
+++ b/include/swobject.h
@@ -0,0 +1,54 @@
+#ifndef SWOBJECT_H
+#define SWOBJECT_H
+
+#include <utilfuns.h>
+#if !defined(__GNUC__) && !defined(_WIN32_WCE)
+#else
+#include <unixstr.h>
+#endif
+
+#include <defs.h>
+#include <string.h>
+
+#define SWDYNAMIC_CAST(className, object) (className *)((object)?((object->getClass()->isAssignableFrom(#className))?object:0):0)
+
+/**
+* Class used for SWDYNAMIC_CAST to save the inheritance order.
+*/
+class SWDLLEXPORT SWClass {
+private:
+	const char **descends;
+
+public:
+	SWClass(const char **descends) {
+		this->descends = descends;
+	}
+
+	bool isAssignableFrom(const char *className) const {
+		for (int i = 0; descends[i]; i++) {
+			if (!stricmp(descends[i], className))
+				return true;
+		}
+		return false;
+	}
+};
+
+/** Base class for major Sword classes.
+* SWObject is the base class for major Sword classes like SWKey.
+* It is used because dynamic_cast is not available on all plattforms supported
+* by Sword. Use SWDYNAMIC_CAST(classname, object) instead of dynamic_cast<classname>(object).
+*/
+class SWObject {
+protected:
+	SWClass * myclass;
+     
+public:
+	/** Use this to get the class definition and inheritance order.
+	* @return The class definition of this object
+	*/
+	const SWClass *getClass () const {
+		return myclass;
+	}
+};
+
+#endif