StringTokenReader.java

/*
  StringTokenReader.java

  (c) 2008-2013 Edward Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.tools.asm;

/**
 * @author ejs
 *
 */
public class StringTokenReader implements TokenReader {

	private String string;
	private int pos;

	public StringTokenReader(String string) {
		this.string = string;
		this.pos = 0;
	}
	/* (non-Javadoc)
	 * @see v9t9.tools.asm.TokenReader#getPos()
	 */
	public int getPos() {
		return pos;
	}

	/* (non-Javadoc)
	 * @see v9t9.tools.asm.TokenReader#read()
	 */
	public int read() {
		if (pos < string.length())
			return string.charAt(pos++);
		else
			return -1;
	}
	
	public void unread() {
		pos--;
	}

	/* (non-Javadoc)
	 * @see v9t9.tools.asm.TokenReader#setPos(int)
	 */
	public void setPos(int pos) {
		this.pos = pos;
	}

}