/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package davaguine.jmac.tools;
import java.util.Arrays;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class ByteArrayWriter {
private byte[] data = null;
private int index = 0;
public ByteArrayWriter() {
}
public ByteArrayWriter(int size) {
this.data = new byte[size];
}
public ByteArrayWriter(final byte[] data) {
this.data = data;
}
public void reset(int size) {
this.data = new byte[size];
index = 0;
}
public byte[] getBytes() {
return data;
}
public void writeUnsignedByte(short value) {
if (value < 0 || value > 255)
throw new JMACException("Wrong Value");
data[index++] = (byte) value;
}
public void writeUnsignedShort(int value) {
if (value < 0 || value > 65535)
throw new JMACException("Wrong Value");
data[index++] = (byte) (value & 0xff);
data[index++] = (byte) (value >> 8);
}
public void writeUnsignedInt(long value) {
if (value < 0 || value > 4294967295L)
throw new JMACException("Wrong Value");
data[index++] = (byte) (value & 0xff);
data[index++] = (byte) ((value >> 8) & 0xff);
data[index++] = (byte) ((value >> 16) & 0xff);
data[index++] = (byte) ((value >> 24) & 0xff);
}
public void writeByte(byte value) {
data[index++] = value;
}
public void writeShort(short value) {
data[index++] = (byte) (value & 0xff);
data[index++] = (byte) (value >> 8);
}
public void writeInt(int value) {
data[index++] = (byte) (value & 0xff);
data[index++] = (byte) ((value >> 8) & 0xff);
data[index++] = (byte) ((value >> 16) & 0xff);
data[index++] = (byte) ((value >> 24) & 0xff);
}
public void writeBytes(byte[] buf) {
writeBytes(buf, 0, buf.length);
}
public void writeBytes(byte[] buf, int off, int len) {
System.arraycopy(buf, off, data, index, len);
index += len;
}
public void writeString(String value, int size) {
byte[] bytes = value.getBytes();
if (bytes.length > size)
bytes = Arrays.copyOfRange(bytes, 0, size);
System.arraycopy(bytes, 0, data, index, bytes.length);
index += size;
}
public void writeZString(String value, String encoding) {
try {
byte[] bytes = value.getBytes(encoding);
System.arraycopy(bytes, 0, data, index, bytes.length);
index += bytes.length;
} catch (java.io.UnsupportedEncodingException e) {
throw new JMACException("Unsupported Encoding", e);
}
data[index++] = 0;
}
}