/* * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */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) }}
/*
* Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
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)
}
}