diff options
Diffstat (limited to 'org.fox.ttcomics/src/main/java/com/github/junrar/io/ReadOnlyAccessByteArray.java')
| -rw-r--r-- | org.fox.ttcomics/src/main/java/com/github/junrar/io/ReadOnlyAccessByteArray.java | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/org.fox.ttcomics/src/main/java/com/github/junrar/io/ReadOnlyAccessByteArray.java b/org.fox.ttcomics/src/main/java/com/github/junrar/io/ReadOnlyAccessByteArray.java new file mode 100644 index 0000000..bbdb687 --- /dev/null +++ b/org.fox.ttcomics/src/main/java/com/github/junrar/io/ReadOnlyAccessByteArray.java @@ -0,0 +1,90 @@ +/*
+ * 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 com.github.junrar.io;
+
+import java.io.EOFException;
+import java.io.IOException;
+
+/**
+ * A File like access to a byte array.
+ * (seek and read certain number of bytes)
+ *
+ * @author $LastChangedBy$
+ * @version $LastChangedRevision$
+ */
+public class ReadOnlyAccessByteArray implements IReadOnlyAccess{
+
+ private int positionInFile;
+ private byte[] file;
+
+ /**
+ * Initialize with byte[ ]
+ * @param file the file given as byte array
+ */
+ 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();
+ }
+ }
+
+ /** Read a single byte of data. */
+ public int read() throws IOException {
+ return file[positionInFile++];
+ }
+
+ /**
+ * Read up to <tt>count</tt> bytes to the specified buffer.
+ */
+ 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-(int)positionInFile-1);
+ System.arraycopy(file, (int)positionInFile, buffer, 0, read );
+ positionInFile+=read;
+ return read;
+ }
+
+ public void close() throws IOException {
+ }
+}
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