| /* ZipOutputStream.java - Create a file in zip format |
| Copyright (C) 1999, 2000 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| As a special exception, if you link this library with other files to |
| produce an executable, this library does not by itself cause the |
| resulting executable to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why the |
| executable file might be covered by the GNU General Public License. */ |
| |
| package java.util.zip; |
| |
| import java.io.*; |
| |
| /* Written using on-line Java Platform 1.2 API Specification |
| * and JCL book. |
| * Believed complete and correct. |
| */ |
| |
| public class ZipOutputStream extends DeflaterOutputStream |
| implements ZipConstants |
| { |
| public static final int STORED = 0; |
| public static final int DEFLATED = 8; |
| |
| public void close () throws IOException |
| { |
| finish (); |
| out.close(); |
| } |
| |
| public void closeEntry () throws IOException |
| { |
| int compressed_size; |
| if (current.method == STORED) |
| { |
| compressed_size = uncompressed_size; |
| } |
| else |
| { |
| super.finish(); |
| compressed_size = def.getTotalOut(); |
| } |
| long crc = sum.getValue(); |
| |
| bytes_written += compressed_size; |
| |
| if (current.getCrc() == -1 || current.getCompressedSize() == -1 |
| || current.getSize() == -1) |
| { |
| current.setCrc(crc); |
| current.compressedSize = compressed_size; |
| current.setSize(uncompressed_size); |
| put4 (0x08074b50); |
| put4 ((int) (current.getCrc())); |
| put4 ((int) (current.getCompressedSize())); |
| put4 ((int) (current.getSize())); |
| bytes_written += 16; |
| } |
| else if (current.getCrc() != crc |
| || current.getCompressedSize() != compressed_size |
| || current.getSize() != uncompressed_size) |
| throw new ZipException ("zip entry field incorrect"); |
| |
| current.next = chain; |
| chain = current; |
| current = null; |
| } |
| |
| public void write (int bval) throws IOException |
| { |
| if (current.method == STORED) |
| { |
| out.write(bval); |
| } |
| else |
| super.write(bval); |
| sum.update(bval); |
| uncompressed_size += 1; |
| } |
| |
| public void write (byte[] buf, int off, int len) throws IOException |
| { |
| if (current.method == STORED) |
| out.write(buf, off, len); |
| else |
| super.write(buf, off, len); |
| sum.update(buf, off, len); |
| uncompressed_size += len; |
| } |
| |
| public void finish () throws IOException |
| { |
| if (current != null) |
| closeEntry (); |
| |
| // Write the central directory. |
| long offset = bytes_written; |
| int count = 0; |
| int bytes = 0; |
| while (chain != null) |
| { |
| bytes += write_entry (chain, false); |
| ++count; |
| chain = chain.next; |
| } |
| |
| // Write the end of the central directory record. |
| put4 (0x06054b50); |
| // Disk number. |
| put2 (0); |
| // Another disk number. |
| put2 (0); |
| put2 (count); |
| put2 (count); |
| put4 (bytes); |
| put4 ((int) offset); |
| |
| byte[] c = comment.getBytes("8859_1"); |
| put2 (c.length); |
| out.write(c); |
| } |
| |
| // Helper for finish and putNextEntry. |
| private int write_entry (ZipEntry entry, boolean is_local) |
| throws IOException |
| { |
| int bytes = put4 (is_local ? 0x04034b50 : 0x02014b50); |
| if (! is_local) |
| bytes += put_version (); |
| bytes += put_version (); |
| |
| boolean crc_after = false; |
| if (is_local |
| && (entry.getCrc() == -1 || entry.getCompressedSize() == -1 |
| || entry.getSize() == -1)) |
| crc_after = true; |
| // For the bits field we always indicate `normal' compression, |
| // even if that isn't true. |
| bytes += put2 (crc_after ? (1 << 3) : 0); |
| bytes += put2 (entry.method); |
| |
| bytes += put2(0); // time - FIXME |
| bytes += put2(0); // date - FIXME |
| |
| if (crc_after) |
| { |
| // CRC, compressedSize, and Size are always 0 in this header. |
| // The actual values are given after the entry. |
| bytes += put4 (0); |
| bytes += put4 (0); |
| bytes += put4 (0); |
| } |
| else |
| { |
| bytes += put4 ((int) (entry.getCrc())); |
| bytes += put4 ((int) (entry.getCompressedSize())); |
| bytes += put4 ((int) (entry.getSize())); |
| } |
| |
| byte[] name = entry.name.getBytes("8859_1"); |
| bytes += put2 (name.length); |
| bytes += put2 (entry.extra == null ? 0 : entry.extra.length); |
| |
| byte[] comment = null; |
| if (! is_local) |
| { |
| if (entry.getComment() == null) |
| bytes += put2 (0); |
| else |
| { |
| comment = entry.getComment().getBytes("8859_1"); |
| bytes += put2 (comment.length); |
| } |
| |
| // Disk number start. |
| bytes += put2 (0); |
| // Internal file attributes. |
| bytes += put2 (0); |
| // External file attributes. |
| bytes += put4 (0); |
| // Relative offset of local header. |
| bytes += put4 ((int) entry.relativeOffset); |
| } |
| |
| out.write (name); |
| bytes += name.length; |
| if (entry.extra != null) |
| { |
| out.write(entry.extra); |
| bytes += entry.extra.length; |
| } |
| if (comment != null) |
| { |
| out.write(comment); |
| bytes += comment.length; |
| } |
| |
| bytes_written += bytes; |
| return bytes; |
| } |
| |
| public void putNextEntry (ZipEntry entry) throws IOException |
| { |
| if (current != null) |
| closeEntry (); |
| |
| if (entry.method < 0 ) |
| entry.method = method; |
| if (entry.method == STORED) |
| { |
| if (entry.getSize() == -1 || entry.getCrc() == -1) |
| throw new ZipException ("required entry not set"); |
| // Just in case. |
| entry.compressedSize = entry.getSize(); |
| } |
| entry.relativeOffset = bytes_written; |
| write_entry (entry, true); |
| current = entry; |
| int compr = (method == STORED) ? Deflater.NO_COMPRESSION : level; |
| def.reset(); |
| def.setLevel(compr); |
| sum.reset(); |
| } |
| |
| public void setLevel (int level) |
| { |
| if (level != Deflater.DEFAULT_COMPRESSION |
| && (level < Deflater.NO_COMPRESSION |
| || level > Deflater.BEST_COMPRESSION)) |
| throw new IllegalArgumentException (); |
| this.level = level; |
| } |
| |
| public void setMethod (int method) |
| { |
| if (method != DEFLATED && method != STORED) |
| throw new IllegalArgumentException (); |
| this.method = method; |
| } |
| |
| public void setComment (String comment) |
| { |
| if (comment.length() > 65535) |
| throw new IllegalArgumentException (); |
| this.comment = comment; |
| } |
| |
| public ZipOutputStream (OutputStream out) |
| { |
| super (out, new Deflater (Deflater.DEFAULT_COMPRESSION, true), 8192); |
| sum = new CRC32 (); |
| } |
| |
| private int put2 (int i) throws IOException |
| { |
| out.write (i); |
| out.write (i >> 8); |
| return 2; |
| } |
| |
| private int put4 (int i) throws IOException |
| { |
| out.write (i); |
| out.write (i >> 8); |
| out.write (i >> 16); |
| out.write (i >> 24); |
| return 4; |
| } |
| |
| private int put_version () throws IOException |
| { |
| // FIXME: for now we assume Unix, and we ignore the version |
| // number. |
| return put2 (3 << 8); |
| } |
| |
| // The entry we are currently writing, or null if we've called |
| // closeEntry. |
| private ZipEntry current; |
| // The chain of entries which have been written to this file. |
| private ZipEntry chain; |
| |
| private int method = DEFLATED; |
| private int level = Deflater.DEFAULT_COMPRESSION; |
| private String comment = ""; |
| private long bytes_written; |
| |
| private int uncompressed_size; |
| |
| /** The checksum object. */ |
| private Checksum sum; |
| } |