/* -*-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);
}
}