FDCStatus.java

/*
  FDCStatus.java

  (c) 2011-2013 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.engine.files.image;

import java.util.HashMap;
import java.util.Map;

public class FDCStatus {
	private Map<StatusBit, Boolean> values = new HashMap<StatusBit, Boolean>();
	//public byte markType;
	
	public static final StatusBit[] COMMON_STATUS = {
		StatusBit.NOT_READY, StatusBit.WRITE_PROTECT, StatusBit.HEAD_LOADED, StatusBit.SEEK_ERROR, 
		StatusBit.CRC_ERROR, StatusBit.TRACK_0, StatusBit.INDEX_PULSE, StatusBit.BUSY
	};
	
	public static final StatusBit[] R_STATUS = {
		StatusBit.NOT_READY, StatusBit.REC_NOT_FOUND,
		StatusBit.CRC_ERROR, StatusBit.LOST_DATA, StatusBit.DRQ_PIN, StatusBit.BUSY
	};
	public static final StatusBit[] W_STATUS = {
		StatusBit.NOT_READY, StatusBit.WRITE_PROTECT, StatusBit.REC_NOT_FOUND,
		StatusBit.CRC_ERROR, StatusBit.LOST_DATA, StatusBit.DRQ_PIN, StatusBit.BUSY
	};
	public boolean is(StatusBit bit) {
		return values.containsKey(bit) && values.get(bit);
	}
	public void set(StatusBit bit) {
		values.put(bit, Boolean.TRUE);
	}
	public void reset(StatusBit bit) {
		values.put(bit, Boolean.FALSE);
	}
	public void clear() {
		values.clear();
	}
	
	public String toString(int command) {
		StringBuilder status = new StringBuilder();
		StatusBit[] bits = COMMON_STATUS;
		switch (command) {
		case RealDiskConsts.FDC_readIDmarker:
		case RealDiskConsts.FDC_readsector:
		case RealDiskConsts.FDC_readtrack:
			bits = R_STATUS;
			break;
		case RealDiskConsts.FDC_writesector:
		case RealDiskConsts.FDC_writetrack:
			bits = W_STATUS;
			break;
		}
		
		for (StatusBit bit : bits) {
			if (is(bit)) {
				if (status.length() > 0)
					status.append(',');
				status.append(bit);
			}
		}
		return status.toString();
	}
	/**
	 * @param status
	 * @return
	 */
	public byte calculate(int command) {
		StatusBit[] bits = COMMON_STATUS;
		switch (command) {
		case RealDiskConsts.FDC_readIDmarker:
		case RealDiskConsts.FDC_readsector:
		case RealDiskConsts.FDC_readtrack:
			bits = R_STATUS;
			break;
		case RealDiskConsts.FDC_writesector:
		case RealDiskConsts.FDC_writetrack:
			bits = W_STATUS;
			break;
		}
		
		byte val = 0;
		for (StatusBit bit : bits) {
			if (is(bit)) {
				val |= bit.val;
			}
		}
		return val;
	}
}