0N/A/*
2362N/A * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage com.sun.imageio.plugins.common;
0N/A
0N/Aimport java.io.IOException;
0N/Aimport javax.imageio.stream.ImageInputStreamImpl;
0N/Aimport javax.imageio.stream.ImageInputStream;
0N/A
0N/Apublic final class SubImageInputStream extends ImageInputStreamImpl {
0N/A
0N/A ImageInputStream stream;
0N/A long startingPos;
0N/A int startingLength;
0N/A int length;
0N/A
0N/A public SubImageInputStream(ImageInputStream stream, int length)
0N/A throws IOException {
0N/A this.stream = stream;
0N/A this.startingPos = stream.getStreamPosition();
0N/A this.startingLength = this.length = length;
0N/A }
0N/A
0N/A public int read() throws IOException {
0N/A if (length == 0) { // Local EOF
0N/A return -1;
0N/A } else {
0N/A --length;
0N/A return stream.read();
0N/A }
0N/A }
0N/A
0N/A public int read(byte[] b, int off, int len) throws IOException {
0N/A if (length == 0) { // Local EOF
0N/A return -1;
0N/A }
0N/A
0N/A len = Math.min(len, length);
0N/A int bytes = stream.read(b, off, len);
0N/A length -= bytes;
0N/A return bytes;
0N/A }
0N/A
0N/A public long length() {
0N/A return startingLength;
0N/A }
0N/A
0N/A public void seek(long pos) throws IOException {
0N/A stream.seek(pos - startingPos);
0N/A streamPos = pos;
0N/A }
0N/A
0N/A protected void finalize() throws Throwable {
0N/A // Empty finalizer (for improved performance; no need to call
0N/A // super.finalize() in this case)
0N/A }
0N/A}