Showing the changes to java/pkg/com/sun/imageio/plugins/common/SubImageInputStream.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.imageio.plugins.common; | |
| 27 | + | |
| 28 | +import java.io.IOException; | |
| 29 | +import javax.imageio.stream.ImageInputStreamImpl; | |
| 30 | +import javax.imageio.stream.ImageInputStream; | |
| 31 | + | |
| 32 | +public final class SubImageInputStream extends ImageInputStreamImpl { | |
| 33 | + | |
| 34 | + ImageInputStream stream; | |
| 35 | + long startingPos; | |
| 36 | + int startingLength; | |
| 37 | + int length; | |
| 38 | + | |
| 39 | + public SubImageInputStream(ImageInputStream stream, int length) | |
| 40 | + throws IOException { | |
| 41 | + this.stream = stream; | |
| 42 | + this.startingPos = stream.getStreamPosition(); | |
| 43 | + this.startingLength = this.length = length; | |
| 44 | + } | |
| 45 | + | |
| 46 | + public int read() throws IOException { | |
| 47 | + if (length == 0) { // Local EOF | |
| 48 | + return -1; | |
| 49 | + } else { | |
| 50 | + --length; | |
| 51 | + return stream.read(); | |
| 52 | + } | |
| 53 | + } | |
| 54 | + | |
| 55 | + public int read(byte[] b, int off, int len) throws IOException { | |
| 56 | + if (length == 0) { // Local EOF | |
| 57 | + return -1; | |
| 58 | + } | |
| 59 | + | |
| 60 | + len = Math.min(len, length); | |
| 61 | + int bytes = stream.read(b, off, len); | |
| 62 | + length -= bytes; | |
| 63 | + return bytes; | |
| 64 | + } | |
| 65 | + | |
| 66 | + public long length() { | |
| 67 | + return startingLength; | |
| 68 | + } | |
| 69 | + | |
| 70 | + public void seek(long pos) throws IOException { | |
| 71 | + stream.seek(pos - startingPos); | |
| 72 | + streamPos = pos; | |
| 73 | + } | |
| 74 | + | |
| 75 | + protected void finalize() throws Throwable { | |
| 76 | + // Empty finalizer (for improved performance; no need to call | |
| 77 | + // super.finalize() in this case) | |
| 78 | + } | |
| 79 | +} | |