public static RubyClass createPointerClass(Ruby runtime, RubyModule module) {
RubyClass pointerClass =
module.defineClassUnder(
"Pointer",
module.getClass(AbstractMemory.ABSTRACT_MEMORY_RUBY_CLASS),
RubyInstanceConfig.REIFY_RUBY_CLASSES
? new ReifyingAllocator(Pointer.class)
: PointerAllocator.INSTANCE);
pointerClass.defineAnnotatedMethods(Pointer.class);
pointerClass.defineAnnotatedConstants(Pointer.class);
pointerClass.setReifiedClass(Pointer.class);
pointerClass.kindOf =
new RubyModule.KindOf() {
@Override
public boolean isKindOf(IRubyObject obj, RubyModule type) {
return obj instanceof Pointer && super.isKindOf(obj, type);
}
};
module.defineClassUnder(
"NullPointerError", runtime.getRuntimeError(), runtime.getRuntimeError().getAllocator());
// Add Pointer::NULL as a constant
Pointer nullPointer = new Pointer(runtime, pointerClass, new NullMemoryIO(runtime));
pointerClass.setConstant("NULL", nullPointer);
runtime
.getNilClass()
.addMethod("to_ptr", new NilToPointerMethod(runtime.getNilClass(), nullPointer));
return pointerClass;
}
private IRubyObject prepareRaiseException(Ruby runtime, IRubyObject[] args, Block block) {
if (args.length == 0) {
IRubyObject lastException = errorInfo;
if (lastException.isNil()) {
return new RaiseException(runtime, runtime.getRuntimeError(), "", false).getException();
}
return lastException;
}
IRubyObject exception;
ThreadContext context = getRuntime().getCurrentContext();
if (args.length == 1) {
if (args[0] instanceof RubyString) {
return runtime.getRuntimeError().newInstance(context, args, block);
}
if (!args[0].respondsTo("exception")) {
return runtime.newTypeError("exception class/object expected").getException();
}
exception = args[0].callMethod(context, "exception");
} else {
if (!args[0].respondsTo("exception")) {
return runtime.newTypeError("exception class/object expected").getException();
}
exception = args[0].callMethod(context, "exception", args[1]);
}
if (!runtime.getException().isInstance(exception)) {
return runtime.newTypeError("exception object expected").getException();
}
if (args.length == 3) {
((RubyException) exception).set_backtrace(args[2]);
}
return exception;
}