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PDF renderer implementation supporting the subset of PDF 1.4 specification.

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package org.openpdf.renderer.function.postscript.operation;

import java.util.Stack;

final class Bitshift implements PostScriptOperation {
	@Override
	/**
	 * int1 shift bitshift int2 
	 *
	 * shifts the binary representation of int1 left by
	 * shift bits and returns the result. Bits shifted out
	 * are lost; bits shifted in are 0. If shift is negative,
	 * a right shift by –shift bits is performed.
	 * This PostScriptOperation produces an arithmetically correct
	 * result only for positive values of int1.
	 * Both int1 and shift must be integers. 

	 *
	 * errors: stackunderflow, typecheck
	 */
	public void eval(Stack