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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/util/zip/ZipOutputStream.java
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+/* ZipOutputStream.java --
+ Copyright (C) 2001, 2004, 2005, 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.util.zip;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
+import java.util.Enumeration;
+import java.util.Vector;
+
+/**
+ * This is a FilterOutputStream that writes the files into a zip
+ * archive one after another. It has a special method to start a new
+ * zip entry. The zip entries contains information about the file name
+ * size, compressed size, CRC, etc.
+ *
+ * It includes support for STORED and DEFLATED entries.
+ *
+ * This class is not thread safe.
+ *
+ * @author Jochen Hoenicke
+ */
+public class ZipOutputStream extends DeflaterOutputStream implements ZipConstants
+{
+ private Vector entries = new Vector();
+ private CRC32 crc = new CRC32();
+ private ZipEntry curEntry = null;
+
+ private int curMethod;
+ private int size;
+ private int offset = 0;
+
+ private byte[] zipComment = new byte[0];
+ private int defaultMethod = DEFLATED;
+
+ /**
+ * Our Zip version is hard coded to 1.0 resp. 2.0
+ */
+ private static final int ZIP_STORED_VERSION = 10;
+ private static final int ZIP_DEFLATED_VERSION = 20;
+
+ /**
+ * Compression method. This method doesn't compress at all.
+ */
+ public static final int STORED = 0;
+
+ /**
+ * Compression method. This method uses the Deflater.
+ */
+ public static final int DEFLATED = 8;
+
+ /**
+ * Creates a new Zip output stream, writing a zip archive.
+ * @param out the output stream to which the zip archive is written.
+ */
+ public ZipOutputStream(OutputStream out)
+ {
+ super(out, new Deflater(Deflater.DEFAULT_COMPRESSION, true));
+ }
+
+ /**
+ * Set the zip file comment.
+ * @param comment the comment.
+ * @exception IllegalArgumentException if encoding of comment is
+ * longer than 0xffff bytes.
+ */
+ public void setComment(String comment)
+ {
+ byte[] commentBytes;
+ try
+ {
+ commentBytes = comment.getBytes("UTF-8");
+ }
+ catch (UnsupportedEncodingException uee)
+ {
+ throw new AssertionError(uee);
+ }
+ if (commentBytes.length > 0xffff)
+ throw new IllegalArgumentException("Comment too long.");
+ zipComment = commentBytes;
+ }
+
+ /**
+ * Sets default compression method. If the Zip entry specifies
+ * another method its method takes precedence.
+ * @param method the method.
+ * @exception IllegalArgumentException if method is not supported.
+ * @see #STORED
+ * @see #DEFLATED
+ */
+ public void setMethod(int method)
+ {
+ if (method != STORED && method != DEFLATED)
+ throw new IllegalArgumentException("Method not supported.");
+ defaultMethod = method;
+ }
+
+ /**
+ * Sets default compression level. The new level will be activated
+ * immediately.
+ * @exception IllegalArgumentException if level is not supported.
+ * @see Deflater
+ */
+ public void setLevel(int level)
+ {
+ def.setLevel(level);
+ }
+
+ /**
+ * Write an unsigned short in little endian byte order.
+ */
+ private void writeLeShort(int value) throws IOException
+ {
+ out.write(value & 0xff);
+ out.write((value >> 8) & 0xff);
+ }
+
+ /**
+ * Write an int in little endian byte order.
+ */
+ private void writeLeInt(int value) throws IOException
+ {
+ writeLeShort(value);
+ writeLeShort(value >> 16);
+ }
+
+ /**
+ * Write a long value as an int. Some of the zip constants
+ * are declared as longs even though they fit perfectly well
+ * into integers.
+ */
+ private void writeLeInt(long value) throws IOException
+ {
+ writeLeInt((int) value);
+ }
+
+ /**
+ * Starts a new Zip entry. It automatically closes the previous
+ * entry if present. If the compression method is stored, the entry
+ * must have a valid size and crc, otherwise all elements (except
+ * name) are optional, but must be correct if present. If the time
+ * is not set in the entry, the current time is used.
+ * @param entry the entry.
+ * @exception IOException if an I/O error occured.
+ * @exception ZipException if stream was finished.
+ */
+ public void putNextEntry(ZipEntry entry) throws IOException
+ {
+ if (entries == null)
+ throw new ZipException("ZipOutputStream was finished");
+
+ int method = entry.getMethod();
+ int flags = 0;
+ if (method == -1)
+ method = defaultMethod;
+
+ if (method == STORED)
+ {
+ if (entry.getCompressedSize() >= 0)
+ {
+ if (entry.getSize() < 0)
+ entry.setSize(entry.getCompressedSize());
+ else if (entry.getSize() != entry.getCompressedSize())
+ throw new ZipException
+ ("Method STORED, but compressed size != size");
+ }
+ else
+ entry.setCompressedSize(entry.getSize());
+
+ if (entry.getSize() < 0)
+ throw new ZipException("Method STORED, but size not set");
+ if (entry.getCrc() < 0)
+ throw new ZipException("Method STORED, but crc not set");
+ }
+ else if (method == DEFLATED)
+ {
+ if (entry.getCompressedSize() < 0
+ || entry.getSize() < 0 || entry.getCrc() < 0)
+ flags |= 8;
+ }
+
+ if (curEntry != null)
+ closeEntry();
+
+ if (entry.getTime() < 0)
+ entry.setTime(System.currentTimeMillis());
+
+ entry.flags = flags;
+ entry.offset = offset;
+ entry.setMethod(method);
+ curMethod = method;
+ /* Write the local file header */
+ writeLeInt(LOCSIG);
+ writeLeShort(method == STORED
+ ? ZIP_STORED_VERSION : ZIP_DEFLATED_VERSION);
+ writeLeShort(flags);
+ writeLeShort(method);
+ writeLeInt(entry.getDOSTime());
+ if ((flags & 8) == 0)
+ {
+ writeLeInt((int)entry.getCrc());
+ writeLeInt((int)entry.getCompressedSize());
+ writeLeInt((int)entry.getSize());
+ }
+ else
+ {
+ writeLeInt(0);
+ writeLeInt(0);
+ writeLeInt(0);
+ }
+ byte[] name;
+ try
+ {
+ name = entry.getName().getBytes("UTF-8");
+ }
+ catch (UnsupportedEncodingException uee)
+ {
+ throw new AssertionError(uee);
+ }
+ if (name.length > 0xffff)
+ throw new ZipException("Name too long.");
+ byte[] extra = entry.getExtra();
+ if (extra == null)
+ extra = new byte[0];
+ writeLeShort(name.length);
+ writeLeShort(extra.length);
+ out.write(name);
+ out.write(extra);
+
+ offset += LOCHDR + name.length + extra.length;
+
+ /* Activate the entry. */
+
+ curEntry = entry;
+ crc.reset();
+ if (method == DEFLATED)
+ def.reset();
+ size = 0;
+ }
+
+ /**
+ * Closes the current entry.
+ * @exception IOException if an I/O error occured.
+ * @exception ZipException if no entry is active.
+ */
+ public void closeEntry() throws IOException
+ {
+ if (curEntry == null)
+ throw new ZipException("No open entry");
+
+ /* First finish the deflater, if appropriate */
+ if (curMethod == DEFLATED)
+ super.finish();
+
+ int csize = curMethod == DEFLATED ? def.getTotalOut() : size;
+
+ if (curEntry.getSize() < 0)
+ curEntry.setSize(size);
+ else if (curEntry.getSize() != size)
+ throw new ZipException("size was "+size
+ +", but I expected "+curEntry.getSize());
+
+ if (curEntry.getCompressedSize() < 0)
+ curEntry.setCompressedSize(csize);
+ else if (curEntry.getCompressedSize() != csize)
+ throw new ZipException("compressed size was "+csize
+ +", but I expected "+curEntry.getSize());
+
+ if (curEntry.getCrc() < 0)
+ curEntry.setCrc(crc.getValue());
+ else if (curEntry.getCrc() != crc.getValue())
+ throw new ZipException("crc was " + Long.toHexString(crc.getValue())
+ + ", but I expected "
+ + Long.toHexString(curEntry.getCrc()));
+
+ offset += csize;
+
+ /* Now write the data descriptor entry if needed. */
+ if (curMethod == DEFLATED && (curEntry.flags & 8) != 0)
+ {
+ writeLeInt(EXTSIG);
+ writeLeInt((int)curEntry.getCrc());
+ writeLeInt((int)curEntry.getCompressedSize());
+ writeLeInt((int)curEntry.getSize());
+ offset += EXTHDR;
+ }
+
+ entries.addElement(curEntry);
+ curEntry = null;
+ }
+
+ /**
+ * Writes the given buffer to the current entry.
+ * @exception IOException if an I/O error occured.
+ * @exception ZipException if no entry is active.
+ */
+ public void write(byte[] b, int off, int len) throws IOException
+ {
+ if (curEntry == null)
+ throw new ZipException("No open entry.");
+
+ switch (curMethod)
+ {
+ case DEFLATED:
+ super.write(b, off, len);
+ break;
+
+ case STORED:
+ out.write(b, off, len);
+ break;
+ }
+
+ crc.update(b, off, len);
+ size += len;
+ }
+
+ /**
+ * Finishes the stream. This will write the central directory at the
+ * end of the zip file and flush the stream.
+ * @exception IOException if an I/O error occured.
+ */
+ public void finish() throws IOException
+ {
+ if (entries == null)
+ return;
+ if (curEntry != null)
+ closeEntry();
+
+ int numEntries = 0;
+ int sizeEntries = 0;
+
+ Enumeration e = entries.elements();
+ while (e.hasMoreElements())
+ {
+ ZipEntry entry = (ZipEntry) e.nextElement();
+
+ int method = entry.getMethod();
+ writeLeInt(CENSIG);
+ writeLeShort(method == STORED
+ ? ZIP_STORED_VERSION : ZIP_DEFLATED_VERSION);
+ writeLeShort(method == STORED
+ ? ZIP_STORED_VERSION : ZIP_DEFLATED_VERSION);
+ writeLeShort(entry.flags);
+ writeLeShort(method);
+ writeLeInt(entry.getDOSTime());
+ writeLeInt((int)entry.getCrc());
+ writeLeInt((int)entry.getCompressedSize());
+ writeLeInt((int)entry.getSize());
+
+ byte[] name;
+ try
+ {
+ name = entry.getName().getBytes("UTF-8");
+ }
+ catch (UnsupportedEncodingException uee)
+ {
+ throw new AssertionError(uee);
+ }
+ if (name.length > 0xffff)
+ throw new ZipException("Name too long.");
+ byte[] extra = entry.getExtra();
+ if (extra == null)
+ extra = new byte[0];
+ String str = entry.getComment();
+ byte[] comment;
+ try
+ {
+ comment = str != null ? str.getBytes("UTF-8") : new byte[0];
+ }
+ catch (UnsupportedEncodingException uee)
+ {
+ throw new AssertionError(uee);
+ }
+ if (comment.length > 0xffff)
+ throw new ZipException("Comment too long.");
+
+ writeLeShort(name.length);
+ writeLeShort(extra.length);
+ writeLeShort(comment.length);
+ writeLeShort(0); /* disk number */
+ writeLeShort(0); /* internal file attr */
+ writeLeInt(0); /* external file attr */
+ writeLeInt(entry.offset);
+
+ out.write(name);
+ out.write(extra);
+ out.write(comment);
+ numEntries++;
+ sizeEntries += CENHDR + name.length + extra.length + comment.length;
+ }
+
+ writeLeInt(ENDSIG);
+ writeLeShort(0); /* disk number */
+ writeLeShort(0); /* disk with start of central dir */
+ writeLeShort(numEntries);
+ writeLeShort(numEntries);
+ writeLeInt(sizeEntries);
+ writeLeInt(offset);
+ writeLeShort(zipComment.length);
+ out.write(zipComment);
+ out.flush();
+ entries = null;
+ }
+}