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Directly import JZlib since it appears unmaintained upstream.
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| JZlib 0.0.* were released under the GNU LGPL license. Later, we have switched | ||
| over to a BSD-style license. | ||
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| ------------------------------------------------------------------------------ | ||
| Copyright (c) 2000-2011 ymnk, JCraft,Inc. All rights reserved. | ||
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| Redistribution and use in source and binary forms, with or without | ||
| 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, | ||
| this list of conditions and the following disclaimer. | ||
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| 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. | ||
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| 3. The names of the authors may not be used to endorse or promote products | ||
| 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, | ||
| 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. |
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| /* -*-mode:java; c-basic-offset:2; -*- */ | ||
| /* | ||
| Copyright (c) 2000-2011 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([email protected]) and Mark Adler([email protected]) | ||
| * and contributors of zlib. | ||
| */ | ||
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| package com.jcraft.jsch.jzlib; | ||
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| final public class Adler32 implements Checksum { | ||
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| // largest prime smaller than 65536 | ||
| static final private int BASE=65521; | ||
| // NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 | ||
| static final private int NMAX=5552; | ||
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| private long s1=1L; | ||
| private long s2=0L; | ||
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| public void reset(long init){ | ||
| s1=init&0xffff; | ||
| s2=(init>>16)&0xffff; | ||
| } | ||
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| public void reset(){ | ||
| s1=1L; | ||
| s2=0L; | ||
| } | ||
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| public long getValue(){ | ||
| return ((s2<<16)|s1); | ||
| } | ||
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| public void update(byte[] buf, int index, int len){ | ||
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| if(len==1){ | ||
| s1+=buf[index++]&0xff; s2+=s1; | ||
| s1%=BASE; | ||
| s2%=BASE; | ||
| return; | ||
| } | ||
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| int len1 = len/NMAX; | ||
| int len2 = len%NMAX; | ||
| while(len1-->0) { | ||
| int k=NMAX; | ||
| len-=k; | ||
| while(k-->0){ | ||
| s1+=buf[index++]&0xff; s2+=s1; | ||
| } | ||
| s1%=BASE; | ||
| s2%=BASE; | ||
| } | ||
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| int k=len2; | ||
| len-=k; | ||
| while(k-->0){ | ||
| s1+=buf[index++]&0xff; s2+=s1; | ||
| } | ||
| s1%=BASE; | ||
| s2%=BASE; | ||
| } | ||
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| public Adler32 copy(){ | ||
| Adler32 foo = new Adler32(); | ||
| foo.s1 = this.s1; | ||
| foo.s2 = this.s2; | ||
| return foo; | ||
| } | ||
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| // The following logic has come from zlib.1.2. | ||
| static long combine(long adler1, long adler2, long len2){ | ||
| long BASEL = (long)BASE; | ||
| long sum1; | ||
| long sum2; | ||
| long rem; // unsigned int | ||
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| rem = len2 % BASEL; | ||
| sum1 = adler1 & 0xffffL; | ||
| sum2 = rem * sum1; | ||
| sum2 %= BASEL; // MOD(sum2); | ||
| sum1 += (adler2 & 0xffffL) + BASEL - 1; | ||
| sum2 += ((adler1 >> 16) & 0xffffL) + ((adler2 >> 16) & 0xffffL) + BASEL - rem; | ||
| if (sum1 >= BASEL) sum1 -= BASEL; | ||
| if (sum1 >= BASEL) sum1 -= BASEL; | ||
| if (sum2 >= (BASEL << 1)) sum2 -= (BASEL << 1); | ||
| if (sum2 >= BASEL) sum2 -= BASEL; | ||
| return sum1 | (sum2 << 16); | ||
| } | ||
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| /* | ||
| private java.util.zip.Adler32 adler=new java.util.zip.Adler32(); | ||
| public void update(byte[] buf, int index, int len){ | ||
| if(buf==null) {adler.reset();} | ||
| else{adler.update(buf, index, len);} | ||
| } | ||
| public void reset(){ | ||
| adler.reset(); | ||
| } | ||
| public void reset(long init){ | ||
| if(init==1L){ | ||
| adler.reset(); | ||
| } | ||
| else{ | ||
| System.err.println("unsupported operation"); | ||
| } | ||
| } | ||
| public long getValue(){ | ||
| return adler.getValue(); | ||
| } | ||
| */ | ||
| } |
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