jaroslav@694: /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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: final class JzLibInflater extends ZStream{
jaroslav@694: 
jaroslav@694:   static final private int MAX_WBITS=15;        // 32K LZ77 window
jaroslav@694:   static final private int DEF_WBITS=MAX_WBITS;
jaroslav@694: 
jaroslav@694:   public static final int Z_NO_FLUSH=0;
jaroslav@694:   static final private int Z_PARTIAL_FLUSH=1;
jaroslav@694:   static final private int Z_SYNC_FLUSH=2;
jaroslav@694:   static final private int Z_FULL_FLUSH=3;
jaroslav@694:   static final private int Z_FINISH=4;
jaroslav@694: 
jaroslav@694:   static final private int MAX_MEM_LEVEL=9;
jaroslav@694: 
jaroslav@694:   static final private int Z_OK=0;
jaroslav@694:   static final private int Z_STREAM_END=1;
jaroslav@694:   static final private int Z_NEED_DICT=2;
jaroslav@694:   static final private int Z_ERRNO=-1;
jaroslav@694:   static final private int Z_STREAM_ERROR=-2;
jaroslav@694:   static final private int Z_DATA_ERROR=-3;
jaroslav@694:   static final private int Z_MEM_ERROR=-4;
jaroslav@694:   static final private int Z_BUF_ERROR=-5;
jaroslav@694:   static final private int Z_VERSION_ERROR=-6;
jaroslav@694: 
jaroslav@694:   public JzLibInflater() {
jaroslav@694:     super();
jaroslav@694:     init();
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public JzLibInflater(int w)  {
jaroslav@694:     this(w, false);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public JzLibInflater(int w, boolean nowrap)  {
jaroslav@694:     super();
jaroslav@694:     int ret = init(w, nowrap);
jaroslav@694:     if(ret!=Z_OK)
jaroslav@694:       throw new IllegalStateException(ret+": "+msg);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   private boolean finished = false;
jaroslav@694: 
jaroslav@694:   public int init(){
jaroslav@694:     return init(DEF_WBITS);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int init(boolean nowrap){
jaroslav@694:     return init(DEF_WBITS, nowrap);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int init(int w){
jaroslav@694:     return init(w, false);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int init(int w, boolean nowrap){
jaroslav@694:     finished = false;
jaroslav@694:     istate=new Inflate(this);
jaroslav@694:     return istate.inflateInit(nowrap?-w:w);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int inflate(int f){
jaroslav@694:     if(istate==null) return Z_STREAM_ERROR;
jaroslav@694:     int ret = istate.inflate(f);
jaroslav@694:     if(ret == Z_STREAM_END) 
jaroslav@694:       finished = true;
jaroslav@694:     return ret;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int end(){
jaroslav@694:     finished = true;
jaroslav@694:     if(istate==null) return Z_STREAM_ERROR;
jaroslav@694:     int ret=istate.inflateEnd();
jaroslav@694: //    istate = null;
jaroslav@694:     return ret;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int sync(){
jaroslav@694:     if(istate == null)
jaroslav@694:       return Z_STREAM_ERROR;
jaroslav@694:     return istate.inflateSync();
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int syncPoint(){
jaroslav@694:     if(istate == null)
jaroslav@694:       return Z_STREAM_ERROR;
jaroslav@694:     return istate.inflateSyncPoint();
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public int setDictionary(byte[] dictionary, int dictLength){
jaroslav@694:     if(istate == null)
jaroslav@694:       return Z_STREAM_ERROR;
jaroslav@694:     return istate.inflateSetDictionary(dictionary, dictLength);
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public boolean finished(){
jaroslav@694:     return istate.mode==12 /*DONE*/;
jaroslav@694:   }
jaroslav@694: 
jaroslav@694:   public boolean needDict() {
jaroslav@694:     return istate == null ? false : istate.mode == Inflate.DICT0;
jaroslav@694:   }
jaroslav@694: }