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171 lines
5.3 KiB
171 lines
5.3 KiB
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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/*
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Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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3. The names of the authors may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
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INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This program is based on zlib-1.1.3, so all credit should go authors
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* Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
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* and contributors of zlib.
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*/
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package com.jcraft.jzlib;
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final public class Deflater extends ZStream{
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static final private int MAX_WBITS=15; // 32K LZ77 window
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static final private int DEF_WBITS=MAX_WBITS;
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static final private int Z_NO_FLUSH=0;
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static final private int Z_PARTIAL_FLUSH=1;
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static final private int Z_SYNC_FLUSH=2;
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static final private int Z_FULL_FLUSH=3;
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static final private int Z_FINISH=4;
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static final private int MAX_MEM_LEVEL=9;
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static final private int Z_OK=0;
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static final private int Z_STREAM_END=1;
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static final private int Z_NEED_DICT=2;
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static final private int Z_ERRNO=-1;
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static final private int Z_STREAM_ERROR=-2;
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static final private int Z_DATA_ERROR=-3;
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static final private int Z_MEM_ERROR=-4;
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static final private int Z_BUF_ERROR=-5;
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static final private int Z_VERSION_ERROR=-6;
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private boolean finished = false;
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public Deflater(){
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super();
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}
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public Deflater(int level) throws GZIPException {
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this(level, MAX_WBITS);
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}
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public Deflater(int level, boolean nowrap) throws GZIPException {
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this(level, MAX_WBITS, nowrap);
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}
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public Deflater(int level, int bits) throws GZIPException {
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this(level, bits, false);
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}
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public Deflater(int level, int bits, boolean nowrap) throws GZIPException {
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super();
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int ret = init(level, bits, nowrap);
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if(ret!=Z_OK)
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throw new GZIPException(ret+": "+msg);
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}
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public Deflater(int level, int bits, int memlevel, JZlib.WrapperType wrapperType) throws GZIPException {
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super();
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int ret = init(level, bits, memlevel, wrapperType);
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if(ret!=Z_OK)
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throw new GZIPException(ret+": "+msg);
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}
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public Deflater(int level, int bits, int memlevel) throws GZIPException {
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super();
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int ret = init(level, bits, memlevel);
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if(ret!=Z_OK)
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throw new GZIPException(ret+": "+msg);
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}
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public int init(int level){
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return init(level, MAX_WBITS);
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}
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public int init(int level, boolean nowrap){
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return init(level, MAX_WBITS, nowrap);
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}
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public int init(int level, int bits){
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return init(level, bits, false);
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}
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public int init(int level, int bits, int memlevel, JZlib.WrapperType wrapperType){
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if(bits < 9 || bits > 15){
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return Z_STREAM_ERROR;
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}
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if(wrapperType == JZlib.W_NONE) {
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bits *= -1;
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}
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else if(wrapperType == JZlib.W_GZIP) {
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bits += 16;
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}
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else if(wrapperType == JZlib.W_ANY) {
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return Z_STREAM_ERROR;
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}
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else if(wrapperType == JZlib.W_ZLIB) {
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}
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return init(level, bits, memlevel);
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}
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public int init(int level, int bits, int memlevel){
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finished = false;
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dstate=new Deflate(this);
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return dstate.deflateInit(level, bits, memlevel);
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}
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public int init(int level, int bits, boolean nowrap){
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finished = false;
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dstate=new Deflate(this);
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return dstate.deflateInit(level, nowrap?-bits:bits);
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}
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public int deflate(int flush){
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if(dstate==null){
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return Z_STREAM_ERROR;
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}
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int ret = dstate.deflate(flush);
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if(ret == Z_STREAM_END)
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finished = true;
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return ret;
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}
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public int end(){
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finished = true;
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if(dstate==null) return Z_STREAM_ERROR;
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int ret=dstate.deflateEnd();
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dstate=null;
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free();
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return ret;
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}
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public int params(int level, int strategy){
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if(dstate==null) return Z_STREAM_ERROR;
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return dstate.deflateParams(level, strategy);
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}
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public int setDictionary (byte[] dictionary, int dictLength){
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if(dstate == null)
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return Z_STREAM_ERROR;
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return dstate.deflateSetDictionary(dictionary, dictLength);
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}
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public boolean finished(){
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return finished;
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}
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public int copy(Deflater src){
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this.finished = src.finished;
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return Deflate.deflateCopy(this, src);
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}
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}
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