ByteFormatter.java

/******************************************************************************
 * Product: Adempiere ERP & CRM Smart Business Solution                       *
 * Copyright (C) 1999-2007 ComPiere, Inc. All Rights Reserved.                *
 * This program is free software, you can redistribute it and/or modify it    *
 * under the terms version 2 of the GNU General Public License as published   *
 * by the Free Software Foundation. This program is distributed in the hope   *
 * that it will be useful, but WITHOUT ANY WARRANTY, without even the implied *
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.           *
 * See the GNU General Public License for more details.                       *
 * You should have received a copy of the GNU General Public License along    *
 * with this program, if not, write to the Free Software Foundation, Inc.,    *
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *
 * For the text or an alternative of this public license, you may reach us    *
 * ComPiere, Inc., 2620 Augustine Dr. #245, Santa Clara, CA 95054, USA        *
 * or via info@compiere.org or http://www.compiere.org/license.html           *
 *****************************************************************************/
package ar.com.ergio.print.fiscal.util;

/** A formatter for bytes and byte arrays. */
public final class ByteFormatter
{
	private ByteFormatter() {}

	// To Hex

	public static String toHexString(byte[] b) { return toHexString(b, 0, b.length); }
	public static String toHexString(byte[] b, int off, int len) { return toHexString(new StringBuffer(), b, off, len).toString(); }
	public static StringBuffer toHexString(StringBuffer buffer, byte[] b) { return toHexString(buffer, b, 0, b.length); }
	public static StringBuffer toHexString(StringBuffer buffer, byte[] b, int off, int len)
	{
		if (off < 0 || len < 0 || off > b.length - len) throw new ArrayIndexOutOfBoundsException();
		buffer.append('{');
		for (int i = off, l = off + len; i < l; i++) 
		{
			buffer.append(' ');
			toHex(buffer, b[i]);
		}
		buffer.append(' ');
		buffer.append('}');
		return buffer;
	}

	public static String toHex(int b) { return toHex(new StringBuffer(), b).toString(); }
	public static StringBuffer toHex(StringBuffer buffer, int b)
	{
		buffer.append(Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, 0x10)));
		buffer.append(Character.toUpperCase(Character.forDigit(b & 0xF, 0x10)));
		return buffer;
	}

	// To ASCII

	public static String toASCIIString(byte[] b) { return toASCIIString(b, 0, b.length); }
	public static String toASCIIString(byte[] b, int off, int len) { return toASCIIString(new StringBuffer(), b, off, len).toString(); }
	public static StringBuffer toASCIIString(StringBuffer buffer, byte[] b) { return toASCIIString(buffer, b, 0, b.length); }
	public static StringBuffer toASCIIString(StringBuffer buffer, byte[] b, int off, int len)
	{
		if (off < 0 || len < 0 || off > b.length - len) throw new ArrayIndexOutOfBoundsException();
		buffer.append('"');
		for (int i = off, l = off + len; i < l; i++) toASCII(buffer, b[i]);
		buffer.append('"');
		return buffer;
	}

	public static String toASCII(int b) { return toASCII(new StringBuffer(), b).toString(); }
	public static StringBuffer toASCII(StringBuffer buffer, int b)
	{
		if (b == '\\') buffer.append('\\').append('\\');
		else if (b == '"') buffer.append('\\').append('"');
		else if (b >= 0x20 && b <= 0x7F) buffer.append((char) b);
		else toHex(buffer.append('\\').append('x'), b);
		return buffer;
	}
}