/*
* Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package com.sun.imageio.plugins.common;
import java.io.IOException;
import javax.imageio.stream.ImageInputStreamImpl;
import javax.imageio.stream.ImageInputStream;
public final class SubImageInputStream extends ImageInputStreamImpl {
ImageInputStream stream;
long startingPos;
int startingLength;
int length;
public SubImageInputStream(ImageInputStream stream, int length)
throws IOException {
this.stream = stream;
this.startingPos = stream.getStreamPosition();
this.startingLength = this.length = length;
}
public int read() throws IOException {
if (length == 0) { // Local EOF
return -1;
} else {
--length;
return stream.read();
}
}
public int read(byte[] b, int off, int len) throws IOException {
if (length == 0) { // Local EOF
return -1;
}
len = Math.min(len, length);
int bytes = stream.read(b, off, len);
length -= bytes;
return bytes;
}
public long length() {
return startingLength;
}
public void seek(long pos) throws IOException {
stream.seek(pos - startingPos);
streamPos = pos;
}
protected void finalize() throws Throwable {
// Empty finalizer (for improved performance; no need to call
// super.finalize() in this case)
}
}