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https://github.com/openjdk/jdk.git
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8187443: Forest Consolidation: Move files to unified layout
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson
parent
270fe13182
commit
3789983e89
56923 changed files with 3 additions and 15727 deletions
426
src/java.base/share/classes/java/util/zip/ZipInputStream.java
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426
src/java.base/share/classes/java/util/zip/ZipInputStream.java
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@ -0,0 +1,426 @@
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/*
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* Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.zip;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.EOFException;
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import java.io.PushbackInputStream;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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import static java.util.zip.ZipConstants64.*;
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import static java.util.zip.ZipUtils.*;
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/**
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* This class implements an input stream filter for reading files in the
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* ZIP file format. Includes support for both compressed and uncompressed
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* entries.
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*
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* @author David Connelly
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* @since 1.1
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*/
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public
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class ZipInputStream extends InflaterInputStream implements ZipConstants {
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private ZipEntry entry;
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private int flag;
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private CRC32 crc = new CRC32();
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private long remaining;
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private byte[] tmpbuf = new byte[512];
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private static final int STORED = ZipEntry.STORED;
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private static final int DEFLATED = ZipEntry.DEFLATED;
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private boolean closed = false;
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// this flag is set to true after EOF has reached for
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// one entry
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private boolean entryEOF = false;
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private ZipCoder zc;
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/**
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* Check to make sure that this stream has not been closed
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*/
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private void ensureOpen() throws IOException {
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if (closed) {
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throw new IOException("Stream closed");
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}
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}
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/**
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* Creates a new ZIP input stream.
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*
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* <p>The UTF-8 {@link java.nio.charset.Charset charset} is used to
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* decode the entry names.
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*
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* @param in the actual input stream
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*/
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public ZipInputStream(InputStream in) {
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this(in, StandardCharsets.UTF_8);
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}
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/**
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* Creates a new ZIP input stream.
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*
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* @param in the actual input stream
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*
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* @param charset
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* The {@linkplain java.nio.charset.Charset charset} to be
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* used to decode the ZIP entry name (ignored if the
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* <a href="package-summary.html#lang_encoding"> language
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* encoding bit</a> of the ZIP entry's general purpose bit
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* flag is set).
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*
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* @since 1.7
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*/
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public ZipInputStream(InputStream in, Charset charset) {
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super(new PushbackInputStream(in, 512), new Inflater(true), 512);
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usesDefaultInflater = true;
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if(in == null) {
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throw new NullPointerException("in is null");
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}
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if (charset == null)
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throw new NullPointerException("charset is null");
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this.zc = ZipCoder.get(charset);
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}
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/**
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* Reads the next ZIP file entry and positions the stream at the
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* beginning of the entry data.
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* @return the next ZIP file entry, or null if there are no more entries
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public ZipEntry getNextEntry() throws IOException {
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ensureOpen();
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if (entry != null) {
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closeEntry();
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}
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crc.reset();
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inf.reset();
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if ((entry = readLOC()) == null) {
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return null;
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}
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if (entry.method == STORED) {
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remaining = entry.size;
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}
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entryEOF = false;
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return entry;
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}
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/**
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* Closes the current ZIP entry and positions the stream for reading the
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* next entry.
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public void closeEntry() throws IOException {
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ensureOpen();
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while (read(tmpbuf, 0, tmpbuf.length) != -1) ;
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entryEOF = true;
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}
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/**
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* Returns 0 after EOF has reached for the current entry data,
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* otherwise always return 1.
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* <p>
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* Programs should not count on this method to return the actual number
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* of bytes that could be read without blocking.
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*
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* @return 1 before EOF and 0 after EOF has reached for current entry.
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* @exception IOException if an I/O error occurs.
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*
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*/
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public int available() throws IOException {
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ensureOpen();
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if (entryEOF) {
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return 0;
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} else {
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return 1;
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}
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}
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/**
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* Reads from the current ZIP entry into an array of bytes.
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* If <code>len</code> is not zero, the method
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* blocks until some input is available; otherwise, no
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* bytes are read and <code>0</code> is returned.
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* @param b the buffer into which the data is read
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* @param off the start offset in the destination array <code>b</code>
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* @param len the maximum number of bytes read
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* @return the actual number of bytes read, or -1 if the end of the
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* entry is reached
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* @exception NullPointerException if <code>b</code> is <code>null</code>.
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* @exception IndexOutOfBoundsException if <code>off</code> is negative,
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* <code>len</code> is negative, or <code>len</code> is greater than
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* <code>b.length - off</code>
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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*/
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public int read(byte[] b, int off, int len) throws IOException {
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ensureOpen();
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if (off < 0 || len < 0 || off > b.length - len) {
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throw new IndexOutOfBoundsException();
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} else if (len == 0) {
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return 0;
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}
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if (entry == null) {
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return -1;
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}
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switch (entry.method) {
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case DEFLATED:
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len = super.read(b, off, len);
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if (len == -1) {
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readEnd(entry);
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entryEOF = true;
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entry = null;
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} else {
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crc.update(b, off, len);
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}
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return len;
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case STORED:
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if (remaining <= 0) {
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entryEOF = true;
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entry = null;
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return -1;
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}
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if (len > remaining) {
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len = (int)remaining;
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}
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len = in.read(b, off, len);
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if (len == -1) {
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throw new ZipException("unexpected EOF");
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}
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crc.update(b, off, len);
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remaining -= len;
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if (remaining == 0 && entry.crc != crc.getValue()) {
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throw new ZipException(
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"invalid entry CRC (expected 0x" + Long.toHexString(entry.crc) +
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" but got 0x" + Long.toHexString(crc.getValue()) + ")");
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}
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return len;
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default:
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throw new ZipException("invalid compression method");
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}
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}
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/**
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* Skips specified number of bytes in the current ZIP entry.
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* @param n the number of bytes to skip
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* @return the actual number of bytes skipped
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* @exception ZipException if a ZIP file error has occurred
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* @exception IOException if an I/O error has occurred
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* @exception IllegalArgumentException if {@code n < 0}
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*/
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public long skip(long n) throws IOException {
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if (n < 0) {
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throw new IllegalArgumentException("negative skip length");
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}
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ensureOpen();
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int max = (int)Math.min(n, Integer.MAX_VALUE);
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int total = 0;
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while (total < max) {
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int len = max - total;
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if (len > tmpbuf.length) {
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len = tmpbuf.length;
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}
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len = read(tmpbuf, 0, len);
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if (len == -1) {
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entryEOF = true;
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break;
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}
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total += len;
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}
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return total;
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}
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/**
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* Closes this input stream and releases any system resources associated
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* with the stream.
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* @exception IOException if an I/O error has occurred
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*/
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public void close() throws IOException {
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if (!closed) {
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super.close();
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closed = true;
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}
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}
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private byte[] b = new byte[256];
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/*
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* Reads local file (LOC) header for next entry.
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*/
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private ZipEntry readLOC() throws IOException {
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try {
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readFully(tmpbuf, 0, LOCHDR);
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} catch (EOFException e) {
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return null;
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}
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if (get32(tmpbuf, 0) != LOCSIG) {
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return null;
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}
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// get flag first, we need check EFS.
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flag = get16(tmpbuf, LOCFLG);
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// get the entry name and create the ZipEntry first
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int len = get16(tmpbuf, LOCNAM);
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int blen = b.length;
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if (len > blen) {
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do {
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blen = blen * 2;
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} while (len > blen);
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b = new byte[blen];
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}
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readFully(b, 0, len);
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// Force to use UTF-8 if the EFS bit is ON, even the cs is NOT UTF-8
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ZipEntry e = createZipEntry(((flag & EFS) != 0)
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? zc.toStringUTF8(b, len)
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: zc.toString(b, len));
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// now get the remaining fields for the entry
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if ((flag & 1) == 1) {
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throw new ZipException("encrypted ZIP entry not supported");
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}
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e.method = get16(tmpbuf, LOCHOW);
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e.xdostime = get32(tmpbuf, LOCTIM);
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if ((flag & 8) == 8) {
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/* "Data Descriptor" present */
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if (e.method != DEFLATED) {
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throw new ZipException(
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"only DEFLATED entries can have EXT descriptor");
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}
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} else {
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e.crc = get32(tmpbuf, LOCCRC);
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e.csize = get32(tmpbuf, LOCSIZ);
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e.size = get32(tmpbuf, LOCLEN);
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}
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len = get16(tmpbuf, LOCEXT);
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if (len > 0) {
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byte[] extra = new byte[len];
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readFully(extra, 0, len);
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e.setExtra0(extra,
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e.csize == ZIP64_MAGICVAL || e.size == ZIP64_MAGICVAL);
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}
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return e;
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}
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/**
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* Creates a new <code>ZipEntry</code> object for the specified
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* entry name.
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*
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* @param name the ZIP file entry name
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* @return the ZipEntry just created
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*/
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protected ZipEntry createZipEntry(String name) {
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return new ZipEntry(name);
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}
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/**
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* Reads end of deflated entry as well as EXT descriptor if present.
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*
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* Local headers for DEFLATED entries may optionally be followed by a
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* data descriptor, and that data descriptor may optionally contain a
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* leading signature (EXTSIG).
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*
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* From the zip spec http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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*
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* """Although not originally assigned a signature, the value 0x08074b50
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* has commonly been adopted as a signature value for the data descriptor
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* record. Implementers should be aware that ZIP files may be
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* encountered with or without this signature marking data descriptors
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* and should account for either case when reading ZIP files to ensure
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* compatibility."""
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*/
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private void readEnd(ZipEntry e) throws IOException {
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int n = inf.getRemaining();
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if (n > 0) {
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((PushbackInputStream)in).unread(buf, len - n, n);
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}
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if ((flag & 8) == 8) {
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/* "Data Descriptor" present */
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if (inf.getBytesWritten() > ZIP64_MAGICVAL ||
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inf.getBytesRead() > ZIP64_MAGICVAL) {
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// ZIP64 format
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readFully(tmpbuf, 0, ZIP64_EXTHDR);
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long sig = get32(tmpbuf, 0);
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if (sig != EXTSIG) { // no EXTSIG present
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e.crc = sig;
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e.csize = get64(tmpbuf, ZIP64_EXTSIZ - ZIP64_EXTCRC);
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e.size = get64(tmpbuf, ZIP64_EXTLEN - ZIP64_EXTCRC);
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((PushbackInputStream)in).unread(
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tmpbuf, ZIP64_EXTHDR - ZIP64_EXTCRC, ZIP64_EXTCRC);
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} else {
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e.crc = get32(tmpbuf, ZIP64_EXTCRC);
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e.csize = get64(tmpbuf, ZIP64_EXTSIZ);
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e.size = get64(tmpbuf, ZIP64_EXTLEN);
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}
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} else {
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readFully(tmpbuf, 0, EXTHDR);
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long sig = get32(tmpbuf, 0);
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if (sig != EXTSIG) { // no EXTSIG present
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e.crc = sig;
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e.csize = get32(tmpbuf, EXTSIZ - EXTCRC);
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e.size = get32(tmpbuf, EXTLEN - EXTCRC);
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((PushbackInputStream)in).unread(
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tmpbuf, EXTHDR - EXTCRC, EXTCRC);
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} else {
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e.crc = get32(tmpbuf, EXTCRC);
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e.csize = get32(tmpbuf, EXTSIZ);
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e.size = get32(tmpbuf, EXTLEN);
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}
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}
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}
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if (e.size != inf.getBytesWritten()) {
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throw new ZipException(
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"invalid entry size (expected " + e.size +
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" but got " + inf.getBytesWritten() + " bytes)");
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}
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if (e.csize != inf.getBytesRead()) {
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throw new ZipException(
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"invalid entry compressed size (expected " + e.csize +
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" but got " + inf.getBytesRead() + " bytes)");
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}
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if (e.crc != crc.getValue()) {
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throw new ZipException(
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"invalid entry CRC (expected 0x" + Long.toHexString(e.crc) +
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" but got 0x" + Long.toHexString(crc.getValue()) + ")");
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}
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}
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/*
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* Reads bytes, blocking until all bytes are read.
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*/
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private void readFully(byte[] b, int off, int len) throws IOException {
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while (len > 0) {
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int n = in.read(b, off, len);
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if (n == -1) {
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throw new EOFException();
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}
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off += n;
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len -= n;
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}
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}
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}
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