jaroslav@694: /* -*-mode:java; c-basic-offset:2; -*- */
jaroslav@694: /*
jaroslav@694: Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
jaroslav@694: 
jaroslav@694: Redistribution and use in source and binary forms, with or without
jaroslav@694: modification, are permitted provided that the following conditions are met:
jaroslav@694: 
jaroslav@694:   1. Redistributions of source code must retain the above copyright notice,
jaroslav@694:      this list of conditions and the following disclaimer.
jaroslav@694: 
jaroslav@694:   2. Redistributions in binary form must reproduce the above copyright 
jaroslav@694:      notice, this list of conditions and the following disclaimer in 
jaroslav@694:      the documentation and/or other materials provided with the distribution.
jaroslav@694: 
jaroslav@694:   3. The names of the authors may not be used to endorse or promote products
jaroslav@694:      derived from this software without specific prior written permission.
jaroslav@694: 
jaroslav@694: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
jaroslav@694: INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
jaroslav@694: FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
jaroslav@694: INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
jaroslav@694: INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
jaroslav@694: LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
jaroslav@694: OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
jaroslav@694: LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
jaroslav@694: NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
jaroslav@694: EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jaroslav@694:  */
jaroslav@694: /*
jaroslav@694:  * This program is based on zlib-1.1.3, so all credit should go authors
jaroslav@694:  * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
jaroslav@694:  * and contributors of zlib.
jaroslav@694:  */
jaroslav@694: 
jaroslav@694: package org.apidesign.bck2brwsr.emul.zip;
jaroslav@694: 
jaroslav@694: import org.apidesign.bck2brwsr.emul.lang.System;
jaroslav@694: import java.io.UnsupportedEncodingException;
jaroslav@694: 
jaroslav@694: /**
jaroslav@694:  * @see "http://www.ietf.org/rfc/rfc1952.txt"
jaroslav@694:  */
jaroslav@694: final class GZIPHeader implements Cloneable {
jaroslav@694: 
jaroslav@694:   public static final byte OS_MSDOS = (byte) 0x00;
jaroslav@694:   public static final byte OS_AMIGA = (byte) 0x01;
jaroslav@694:   public static final byte OS_VMS = (byte) 0x02;
jaroslav@694:   public static final byte OS_UNIX = (byte) 0x03;
jaroslav@694:   public static final byte OS_ATARI = (byte) 0x05;
jaroslav@694:   public static final byte OS_OS2 = (byte) 0x06;
jaroslav@694:   public static final byte OS_MACOS = (byte) 0x07;
jaroslav@694:   public static final byte OS_TOPS20 = (byte) 0x0a;
jaroslav@694:   public static final byte OS_WIN32 = (byte) 0x0b;
jaroslav@694:   public static final byte OS_VMCMS = (byte) 0x04;
jaroslav@694:   public static final byte OS_ZSYSTEM = (byte) 0x08;
jaroslav@694:   public static final byte OS_CPM = (byte) 0x09;
jaroslav@694:   public static final byte OS_QDOS = (byte) 0x0c;
jaroslav@694:   public static final byte OS_RISCOS = (byte) 0x0d;
jaroslav@694:   public static final byte OS_UNKNOWN = (byte) 0xff;
jaroslav@694: 
jaroslav@694:   boolean text = false;
jaroslav@694:   private boolean fhcrc = false;
jaroslav@694:   long time;
jaroslav@694:   int xflags;
jaroslav@694:   int os = 255;
jaroslav@694:   byte[] extra;
jaroslav@694:   byte[] name;
jaroslav@694:   byte[] comment;
jaroslav@694:   int hcrc;
jaroslav@694:   long crc;
jaroslav@694:   boolean done = false;
jaroslav@694:   long mtime = 0;
jaroslav@694: 
jaroslav@694:   public void setModifiedTime(long mtime) {
jaroslav@694:     this.mtime = mtime;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public long getModifiedTime() {
jaroslav@694:     return mtime;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public void setOS(int os) {
jaroslav@694:     if((0<=os && os <=13) || os==255)
jaroslav@694:       this.os=os;
jaroslav@694:     else
jaroslav@694:       throw new IllegalArgumentException("os: "+os);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int getOS(){
jaroslav@694:     return os;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public void setName(String name) {
jaroslav@694:     try{
jaroslav@694:       this.name=name.getBytes("ISO-8859-1");
jaroslav@694:     }
jaroslav@694:     catch(UnsupportedEncodingException e){
jaroslav@694:       throw new IllegalArgumentException("name must be in ISO-8859-1 "+name);
jaroslav@694:     }
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public String getName(){
jaroslav@694:     if(name==null) return "";
jaroslav@694:     try {
jaroslav@694:       return new String(name, "ISO-8859-1");
jaroslav@694:     }
jaroslav@694:     catch (UnsupportedEncodingException e) {
jaroslav@694:       throw new IllegalArgumentException(e.toString());
jaroslav@694:     }
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public void setComment(String comment) {
jaroslav@694:     try{
jaroslav@694:       this.comment=comment.getBytes("ISO-8859-1");
jaroslav@694:     }
jaroslav@694:     catch(UnsupportedEncodingException e){
jaroslav@694:       throw new IllegalArgumentException("comment must be in ISO-8859-1 "+name);
jaroslav@694:     }
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public String getComment(){
jaroslav@694:     if(comment==null) return "";
jaroslav@694:     try {
jaroslav@694:       return new String(comment, "ISO-8859-1");
jaroslav@694:     }
jaroslav@694:     catch (UnsupportedEncodingException e) {
jaroslav@694:       throw new IllegalArgumentException(e.toString());
jaroslav@694:     }
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public void setCRC(long crc){
jaroslav@694:     this.crc = crc;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public long getCRC(){
jaroslav@694:     return crc;
jaroslav@694:   }
jaroslav@694: /*
jaroslav@694:   void put(Deflate d){
jaroslav@694:     int flag = 0;
jaroslav@694:     if(text){
jaroslav@694:       flag |= 1;     // FTEXT
jaroslav@694:     }
jaroslav@694:     if(fhcrc){
jaroslav@694:       flag |= 2;     // FHCRC
jaroslav@694:     }
jaroslav@694:     if(extra!=null){
jaroslav@694:       flag |= 4;     // FEXTRA
jaroslav@694:     }
jaroslav@694:     if(name!=null){
jaroslav@694:       flag |= 8;    // FNAME
jaroslav@694:     }
jaroslav@694:     if(comment!=null){
jaroslav@694:       flag |= 16;   // FCOMMENT
jaroslav@694:     }
jaroslav@694:     int xfl = 0;
jaroslav@694:     if(d.level == JZlib.Z_BEST_SPEED){
jaroslav@694:       xfl |= 4;
jaroslav@694:     }
jaroslav@694:     else if (d.level == JZlib.Z_BEST_COMPRESSION){
jaroslav@694:       xfl |= 2;
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     d.put_short((short)0x8b1f);  // ID1 ID2
jaroslav@694:     d.put_byte((byte)8);         // CM(Compression Method)
jaroslav@694:     d.put_byte((byte)flag);
jaroslav@694:     d.put_byte((byte)mtime);
jaroslav@694:     d.put_byte((byte)(mtime>>8));
jaroslav@694:     d.put_byte((byte)(mtime>>16));
jaroslav@694:     d.put_byte((byte)(mtime>>24));
jaroslav@694:     d.put_byte((byte)xfl);
jaroslav@694:     d.put_byte((byte)os);
jaroslav@694: 
jaroslav@694:     if(extra!=null){
jaroslav@694:       d.put_byte((byte)extra.length);
jaroslav@694:       d.put_byte((byte)(extra.length>>8));
jaroslav@694:       d.put_byte(extra, 0, extra.length);
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     if(name!=null){
jaroslav@694:       d.put_byte(name, 0, name.length);
jaroslav@694:       d.put_byte((byte)0);
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     if(comment!=null){
jaroslav@694:       d.put_byte(comment, 0, comment.length);
jaroslav@694:       d.put_byte((byte)0);
jaroslav@694:     }
jaroslav@694:   }
jaroslav@694: */
jaroslav@694:   @Override
jaroslav@694:   public Object clone() throws CloneNotSupportedException {
jaroslav@694:     GZIPHeader gheader = (GZIPHeader)super.clone();
jaroslav@694:     byte[] tmp;
jaroslav@694:     if(gheader.extra!=null){
jaroslav@694:       tmp=new byte[gheader.extra.length];
jaroslav@694:       System.arraycopy(gheader.extra, 0, tmp, 0, tmp.length);
jaroslav@694:       gheader.extra = tmp;
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     if(gheader.name!=null){
jaroslav@694:       tmp=new byte[gheader.name.length];
jaroslav@694:       System.arraycopy(gheader.name, 0, tmp, 0, tmp.length);
jaroslav@694:       gheader.name = tmp;
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     if(gheader.comment!=null){
jaroslav@694:       tmp=new byte[gheader.comment.length];
jaroslav@694:       System.arraycopy(gheader.comment, 0, tmp, 0, tmp.length);
jaroslav@694:       gheader.comment = tmp;
jaroslav@694:     }
jaroslav@694: 
jaroslav@694:     return gheader;
jaroslav@694:   }
jaroslav@694: }