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diff --git a/app/src/main/java/com/jcraft/jzlib/Inflate.java b/app/src/main/java/com/jcraft/jzlib/Inflate.java
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+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 class Inflate{
+
+ static final private int MAX_WBITS=15; // 32K LZ77 window
+
+ // preset dictionary flag in zlib header
+ static final private int PRESET_DICT=0x20;
+
+ static final int Z_NO_FLUSH=0;
+ static final int Z_PARTIAL_FLUSH=1;
+ static final int Z_SYNC_FLUSH=2;
+ static final int Z_FULL_FLUSH=3;
+ static final int Z_FINISH=4;
+
+ static final private int Z_DEFLATED=8;
+
+ 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;
+
+ static final private int METHOD=0; // waiting for method byte
+ static final private int FLAG=1; // waiting for flag byte
+ static final private int DICT4=2; // four dictionary check bytes to go
+ static final private int DICT3=3; // three dictionary check bytes to go
+ static final private int DICT2=4; // two dictionary check bytes to go
+ static final private int DICT1=5; // one dictionary check byte to go
+ static final private int DICT0=6; // waiting for inflateSetDictionary
+ static final private int BLOCKS=7; // decompressing blocks
+ static final private int CHECK4=8; // four check bytes to go
+ static final private int CHECK3=9; // three check bytes to go
+ static final private int CHECK2=10; // two check bytes to go
+ static final private int CHECK1=11; // one check byte to go
+ static final private int DONE=12; // finished check, done
+ static final private int BAD=13; // got an error--stay here
+
+ int mode; // current inflate mode
+
+ // mode dependent information
+ int method; // if FLAGS, method byte
+
+ // if CHECK, check values to compare
+ long[] was=new long[1] ; // computed check value
+ long need; // stream check value
+
+ // if BAD, inflateSync's marker bytes count
+ int marker;
+
+ // mode independent information
+ int nowrap; // flag for no wrapper
+ int wbits; // log2(window size) (8..15, defaults to 15)
+
+ InfBlocks blocks; // current inflate_blocks state
+
+ int inflateReset(ZStream z){
+ if(z == null || z.istate == null) return Z_STREAM_ERROR;
+
+ z.total_in = z.total_out = 0;
+ z.msg = null;
+ z.istate.mode = z.istate.nowrap!=0 ? BLOCKS : METHOD;
+ z.istate.blocks.reset(z, null);
+ return Z_OK;
+ }
+
+ int inflateEnd(ZStream z){
+ if(blocks != null)
+ blocks.free(z);
+ blocks=null;
+ // ZFREE(z, z->state);
+ return Z_OK;
+ }
+
+ int inflateInit(ZStream z, int w){
+ z.msg = null;
+ blocks = null;
+
+ // handle undocumented nowrap option (no zlib header or check)
+ nowrap = 0;
+ if(w < 0){
+ w = - w;
+ nowrap = 1;
+ }
+
+ // set window size
+ if(w<8 ||w>15){
+ inflateEnd(z);
+ return Z_STREAM_ERROR;
+ }
+ wbits=w;
+
+ z.istate.blocks=new InfBlocks(z,
+ z.istate.nowrap!=0 ? null : this,
+ 1<<w);
+
+ // reset state
+ inflateReset(z);
+ return Z_OK;
+ }
+
+ int inflate(ZStream z, int f){
+ int r;
+ int b;
+
+ if(z == null || z.istate == null || z.next_in == null)
+ return Z_STREAM_ERROR;
+ f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
+ r = Z_BUF_ERROR;
+ while (true){
+//System.out.println("mode: "+z.istate.mode);
+ switch (z.istate.mode){
+ case METHOD:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ if(((z.istate.method = z.next_in[z.next_in_index++])&0xf)!=Z_DEFLATED){
+ z.istate.mode = BAD;
+ z.msg="unknown compression method";
+ z.istate.marker = 5; // can't try inflateSync
+ break;
+ }
+ if((z.istate.method>>4)+8>z.istate.wbits){
+ z.istate.mode = BAD;
+ z.msg="invalid window size";
+ z.istate.marker = 5; // can't try inflateSync
+ break;
+ }
+ z.istate.mode=FLAG;
+ case FLAG:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ b = (z.next_in[z.next_in_index++])&0xff;
+
+ if((((z.istate.method << 8)+b) % 31)!=0){
+ z.istate.mode = BAD;
+ z.msg = "incorrect header check";
+ z.istate.marker = 5; // can't try inflateSync
+ break;
+ }
+
+ if((b&PRESET_DICT)==0){
+ z.istate.mode = BLOCKS;
+ break;
+ }
+ z.istate.mode = DICT4;
+ case DICT4:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need=((z.next_in[z.next_in_index++]&0xff)<<24)&0xff000000L;
+ z.istate.mode=DICT3;
+ case DICT3:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<16)&0xff0000L;
+ z.istate.mode=DICT2;
+ case DICT2:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<8)&0xff00L;
+ z.istate.mode=DICT1;
+ case DICT1:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need += (z.next_in[z.next_in_index++]&0xffL);
+ z.adler = z.istate.need;
+ z.istate.mode = DICT0;
+ return Z_NEED_DICT;
+ case DICT0:
+ z.istate.mode = BAD;
+ z.msg = "need dictionary";
+ z.istate.marker = 0; // can try inflateSync
+ return Z_STREAM_ERROR;
+ case BLOCKS:
+
+ r = z.istate.blocks.proc(z, r);
+ if(r == Z_DATA_ERROR){
+ z.istate.mode = BAD;
+ z.istate.marker = 0; // can try inflateSync
+ break;
+ }
+ if(r == Z_OK){
+ r = f;
+ }
+ if(r != Z_STREAM_END){
+ return r;
+ }
+ r = f;
+ z.istate.blocks.reset(z, z.istate.was);
+ if(z.istate.nowrap!=0){
+ z.istate.mode=DONE;
+ break;
+ }
+ z.istate.mode=CHECK4;
+ case CHECK4:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need=((z.next_in[z.next_in_index++]&0xff)<<24)&0xff000000L;
+ z.istate.mode=CHECK3;
+ case CHECK3:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<16)&0xff0000L;
+ z.istate.mode = CHECK2;
+ case CHECK2:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<8)&0xff00L;
+ z.istate.mode = CHECK1;
+ case CHECK1:
+
+ if(z.avail_in==0)return r;r=f;
+
+ z.avail_in--; z.total_in++;
+ z.istate.need+=(z.next_in[z.next_in_index++]&0xffL);
+
+ if(((int)(z.istate.was[0])) != ((int)(z.istate.need))){
+ z.istate.mode = BAD;
+ z.msg = "incorrect data check";
+ z.istate.marker = 5; // can't try inflateSync
+ break;
+ }
+
+ z.istate.mode = DONE;
+ case DONE:
+ return Z_STREAM_END;
+ case BAD:
+ return Z_DATA_ERROR;
+ default:
+ return Z_STREAM_ERROR;
+ }
+ }
+ }
+
+
+ int inflateSetDictionary(ZStream z, byte[] dictionary, int dictLength){
+ int index=0;
+ int length = dictLength;
+ if(z==null || z.istate == null|| z.istate.mode != DICT0)
+ return Z_STREAM_ERROR;
+
+ if(z._adler.adler32(1L, dictionary, 0, dictLength)!=z.adler){
+ return Z_DATA_ERROR;
+ }
+
+ z.adler = z._adler.adler32(0, null, 0, 0);
+
+ if(length >= (1<<z.istate.wbits)){
+ length = (1<<z.istate.wbits)-1;
+ index=dictLength - length;
+ }
+ z.istate.blocks.set_dictionary(dictionary, index, length);
+ z.istate.mode = BLOCKS;
+ return Z_OK;
+ }
+
+ static private byte[] mark = {(byte)0, (byte)0, (byte)0xff, (byte)0xff};
+
+ int inflateSync(ZStream z){
+ int n; // number of bytes to look at
+ int p; // pointer to bytes
+ int m; // number of marker bytes found in a row
+ long r, w; // temporaries to save total_in and total_out
+
+ // set up
+ if(z == null || z.istate == null)
+ return Z_STREAM_ERROR;
+ if(z.istate.mode != BAD){
+ z.istate.mode = BAD;
+ z.istate.marker = 0;
+ }
+ if((n=z.avail_in)==0)
+ return Z_BUF_ERROR;
+ p=z.next_in_index;
+ m=z.istate.marker;
+
+ // search
+ while (n!=0 && m < 4){
+ if(z.next_in[p] == mark[m]){
+ m++;
+ }
+ else if(z.next_in[p]!=0){
+ m = 0;
+ }
+ else{
+ m = 4 - m;
+ }
+ p++; n--;
+ }
+
+ // restore
+ z.total_in += p-z.next_in_index;
+ z.next_in_index = p;
+ z.avail_in = n;
+ z.istate.marker = m;
+
+ // return no joy or set up to restart on a new block
+ if(m != 4){
+ return Z_DATA_ERROR;
+ }
+ r=z.total_in; w=z.total_out;
+ inflateReset(z);
+ z.total_in=r; z.total_out = w;
+ z.istate.mode = BLOCKS;
+ return Z_OK;
+ }
+
+ // Returns true if inflate is currently at the end of a block generated
+ // by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+ // implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
+ // but removes the length bytes of the resulting empty stored block. When
+ // decompressing, PPP checks that at the end of input packet, inflate is
+ // waiting for these length bytes.
+ int inflateSyncPoint(ZStream z){
+ if(z == null || z.istate == null || z.istate.blocks == null)
+ return Z_STREAM_ERROR;
+ return z.istate.blocks.sync_point();
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-18 13:58:08 +0000