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<pre><span class="sourceLineNo">001</span>package serp.bytecode;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import java.io.*;<a name="line.3"></a>
<span class="sourceLineNo">004</span><a name="line.4"></a>
<span class="sourceLineNo">005</span>import serp.bytecode.visitor.*;<a name="line.5"></a>
<span class="sourceLineNo">006</span><a name="line.6"></a>
<span class="sourceLineNo">007</span>/**<a name="line.7"></a>
<span class="sourceLineNo">008</span> * The <code>multianewarray</code> instruction, which creates a new<a name="line.8"></a>
<span class="sourceLineNo">009</span> * multi-dimensional array.<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * @author Abe White<a name="line.11"></a>
<span class="sourceLineNo">012</span> */<a name="line.12"></a>
<span class="sourceLineNo">013</span>public class MultiANewArrayInstruction extends ClassInstruction {<a name="line.13"></a>
<span class="sourceLineNo">014</span> private int _dims = -1;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span> MultiANewArrayInstruction(Code owner) {<a name="line.16"></a>
<span class="sourceLineNo">017</span> super(owner, Constants.MULTIANEWARRAY);<a name="line.17"></a>
<span class="sourceLineNo">018</span> }<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span> int getLength() {<a name="line.20"></a>
<span class="sourceLineNo">021</span> return super.getLength() + 1;<a name="line.21"></a>
<span class="sourceLineNo">022</span> }<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span> public int getStackChange() {<a name="line.24"></a>
<span class="sourceLineNo">025</span> return -_dims + 1;<a name="line.25"></a>
<span class="sourceLineNo">026</span> }<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span> /**<a name="line.28"></a>
<span class="sourceLineNo">029</span> * Return the dimensions of the array, or -1 if not set.<a name="line.29"></a>
<span class="sourceLineNo">030</span> */<a name="line.30"></a>
<span class="sourceLineNo">031</span> public int getDimensions() {<a name="line.31"></a>
<span class="sourceLineNo">032</span> return _dims;<a name="line.32"></a>
<span class="sourceLineNo">033</span> }<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span> /**<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Set the dimensions of the array.<a name="line.36"></a>
<span class="sourceLineNo">037</span> *<a name="line.37"></a>
<span class="sourceLineNo">038</span> * @return this instruction, for method chaining<a name="line.38"></a>
<span class="sourceLineNo">039</span> */<a name="line.39"></a>
<span class="sourceLineNo">040</span> public MultiANewArrayInstruction setDimensions(int dims) {<a name="line.40"></a>
<span class="sourceLineNo">041</span> _dims = dims;<a name="line.41"></a>
<span class="sourceLineNo">042</span> return this;<a name="line.42"></a>
<span class="sourceLineNo">043</span> }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> /**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * Two MultiANewArray instructions are equal if they have the same<a name="line.46"></a>
<span class="sourceLineNo">047</span> * type and dimensions, or if the type and dimensions of either is unset.<a name="line.47"></a>
<span class="sourceLineNo">048</span> */<a name="line.48"></a>
<span class="sourceLineNo">049</span> public boolean equalsInstruction(Instruction other) {<a name="line.49"></a>
<span class="sourceLineNo">050</span> if (other == this)<a name="line.50"></a>
<span class="sourceLineNo">051</span> return true;<a name="line.51"></a>
<span class="sourceLineNo">052</span> if (!(other instanceof MultiANewArrayInstruction))<a name="line.52"></a>
<span class="sourceLineNo">053</span> return false;<a name="line.53"></a>
<span class="sourceLineNo">054</span> if (!super.equalsInstruction(other))<a name="line.54"></a>
<span class="sourceLineNo">055</span> return false;<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span> MultiANewArrayInstruction ins = (MultiANewArrayInstruction) other;<a name="line.57"></a>
<span class="sourceLineNo">058</span> int dims = getDimensions();<a name="line.58"></a>
<span class="sourceLineNo">059</span> int otherDims = ins.getDimensions();<a name="line.59"></a>
<span class="sourceLineNo">060</span> return dims == -1 || otherDims == -1 || dims == otherDims;<a name="line.60"></a>
<span class="sourceLineNo">061</span> }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> public void acceptVisit(BCVisitor visit) {<a name="line.63"></a>
<span class="sourceLineNo">064</span> visit.enterMultiANewArrayInstruction(this);<a name="line.64"></a>
<span class="sourceLineNo">065</span> visit.exitMultiANewArrayInstruction(this);<a name="line.65"></a>
<span class="sourceLineNo">066</span> }<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span> void read(Instruction orig) {<a name="line.68"></a>
<span class="sourceLineNo">069</span> super.read(orig);<a name="line.69"></a>
<span class="sourceLineNo">070</span> _dims = ((MultiANewArrayInstruction) orig).getDimensions();<a name="line.70"></a>
<span class="sourceLineNo">071</span> }<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span> void read(DataInput in) throws IOException {<a name="line.73"></a>
<span class="sourceLineNo">074</span> super.read(in);<a name="line.74"></a>
<span class="sourceLineNo">075</span> _dims = in.readUnsignedByte();<a name="line.75"></a>
<span class="sourceLineNo">076</span> }<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span> void write(DataOutput out) throws IOException {<a name="line.78"></a>
<span class="sourceLineNo">079</span> super.write(out);<a name="line.79"></a>
<span class="sourceLineNo">080</span> out.writeByte(_dims);<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span>}<a name="line.82"></a>
</pre>
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