org.openpdf.renderer.function.postscript.operation.Lt Maven / Gradle / Ivy

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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 Lt implements PostScriptOperation {
	@Override
	/**
	 * num1 num2 lt bool 
	 *
	 * pops two objects from the operand stack and pushes true
	 * if the first operand is less than the second, or false
	 * otherwise. If both operands are numbers, lt compares
	 * their mathematical values. If both operands are strings,
	 * lt compares them element by element, treating the elements
	 * as integers in the range 0 to 255, to determine whether
	 * the first string is lexically less than the second.
	 * If the operands are of other types or one is a string
	 * and the other is a number, a typecheck error occurs. 

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