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