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package org.jruby.ir.interpreter;

import java.util.Arrays;
import java.util.EnumSet;
import java.util.List;

import org.jruby.ir.IRFlags;
import org.jruby.ir.IRScope;
import org.jruby.ir.instructions.CallBase;
import org.jruby.ir.runtime.IRRuntimeHelpers;
import org.jruby.ir.instructions.Instr;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.DynamicScope;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;

public class ExitableInterpreterContext extends InterpreterContext {

    public static final ExitableInterpreterContext NULL = new ExitableInterpreterContext(null, null, 0, null, null, 0);

    private final static ExitableInterpreterEngine EXITABLE_INTERPRETER = new ExitableInterpreterEngine();
	
    private final CallBase superCall;
    private final int exitIPC;

    public ExitableInterpreterContext(InterpreterContext originalIC, CallBase superCall, int exitIPC) {
        this(originalIC.getScope(), Arrays.asList(originalIC.getInstructions()), originalIC.getTemporaryVariableCount(), originalIC.getFlags(), superCall, exitIPC);
    }

    private ExitableInterpreterContext(IRScope scope, List<Instr> instructions, int temporaryVariableCount, EnumSet<IRFlags> flags, CallBase superCall, int exitIPC) {
        super(scope, instructions, temporaryVariableCount, flags);

        this.superCall = superCall;
        this.exitIPC = exitIPC;
    }

    public ExitableInterpreterEngineState getEngineState() {
        return new ExitableInterpreterEngineState(this);
    }

    public int getExitIPC() {
        return exitIPC;
    }
    
    @Override
    public ExitableInterpreterEngine getEngine() {
    	return EXITABLE_INTERPRETER;
    }

    /**
     * @return the live ruby values for the operand to the original super call.
      */
    public IRubyObject[] getArgs(ThreadContext context, IRubyObject self, StaticScope currScope, DynamicScope currDynScope, Object[] temps) {
    	IRubyObject[] args = superCall.prepareArguments(context, self, currScope, currDynScope, temps);

        IRRuntimeHelpers.setCallInfo(context, superCall.getFlags());

        return args;
    }
}
