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/*
* Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
* Original author: Edmund Wagner
* Creation date: 30.05.2007
*
* Source: $HeadURL$
* Last changed: $LastChangedDate$
*
* the unrar licence applies to all junrar source and binary distributions
* you are not allowed to use this source to re-create the RAR compression algorithm
*
* Here some html entities which can be used for escaping javadoc tags:
* "&": "&" or "&"
* "<": "<" or "<"
* ">": ">" or ">"
* "@": "@"
*/
package org.fox.ttcomics2.junrar.io;
import java.io.EOFException;
import java.io.IOException;
public class ReadOnlyAccessByteArray implements IReadOnlyAccess {
private int positionInFile;
private byte[] file;
public ReadOnlyAccessByteArray(byte[] file) {
if (file == null) {
throw new NullPointerException("file must not be null!!");
}
this.file = file;
this.positionInFile = 0;
}
public long getPosition() throws IOException {
return positionInFile;
}
public void setPosition(long pos) throws IOException {
if (pos < file.length && pos >= 0) {
this.positionInFile = (int) pos;
} else {
throw new EOFException();
}
}
public int read() throws IOException {
return file[positionInFile++];
}
public int read(byte[] buffer, int off, int count) throws IOException {
int read = Math.min(count, file.length - positionInFile);
System.arraycopy(file, positionInFile, buffer, off, read);
positionInFile += read;
return read;
}
public int readFully(byte[] buffer, int count) throws IOException {
if (buffer == null) {
throw new NullPointerException("buffer must not be null");
}
if (count == 0) {
throw new IllegalArgumentException("cannot read 0 bytes ;-)");
}
int read = Math.min(count, file.length - positionInFile - 1);
System.arraycopy(file, positionInFile, buffer, 0, read);
positionInFile += read;
return read;
}
public void close() throws IOException {
}
}
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