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package org.jruby.ext.ffi.jffi;

import com.kenai.jffi.Function;
import com.kenai.jffi.HeapInvocationBuffer;
import org.jruby.RubyModule;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

final class FastIntPointerMethodOneArg extends FastIntMethod {
    private final IntParameterConverter c1;
    private final ParameterMarshaller m1;

    public FastIntPointerMethodOneArg(RubyModule implementationClass, Function function,
            IntResultConverter intResultConverter, IntParameterConverter[] intParameterConverters,
            ParameterMarshaller[] marshallers) {

        super(implementationClass, function, intResultConverter, intParameterConverters);
        this.c1 = intParameterConverters[0];
        this.m1 = marshallers[0];
    }

    private final IRubyObject invoke(ThreadContext context, IRubyObject arg1) {
        if (c1.isConvertible(context, arg1)) {
            int retval = invoker.invokeIrI(function, c1.intValue(context, arg1));
            return resultConverter.fromNative(context, retval);
        } else {
            HeapInvocationBuffer buffer = new HeapInvocationBuffer(function);
            m1.marshal(context, buffer, arg1);
            return resultConverter.fromNative(context, invoker.invokeInt(function, buffer));
        }
    }

    @Override
    public final IRubyObject call(ThreadContext context, IRubyObject self, RubyModule clazz, String name, IRubyObject[] args, Block block) {
        arity.checkArity(context.getRuntime(), args);
        return invoke(context, args[0]);
    }

    @Override
    public final IRubyObject call(ThreadContext context, IRubyObject self, RubyModule klazz,
            String name, IRubyObject arg1) {
        return invoke(context, arg1);
    }
}