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mcs/class/Compat.ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib/AssemblyInfo.cs Normal file
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// AssemblyInfo.cs
// Copyright (C) 2001 Mike Krueger
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.Reflection;
using System.Runtime.CompilerServices;
[assembly: CLSCompliant(true)]
[assembly: AssemblyTitle("ICSharpCode.SharpZipLibrary")]
[assembly: AssemblyDescription("free C# zlib implementation")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("#ZipLibrary")]
[assembly: AssemblyCopyright("(c) Mike Krueger 2001-2004")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
#if NET_2_0
[assembly: AssemblyVersion("2.6.0.0")]
#else
// not worrying about the NET_1_0 profile for now.
[assembly: AssemblyVersion("0.6.0.0")]
#endif
[assembly: AssemblyDelaySign(true)]
[assembly: AssemblyKeyFile ("SharpZipLib.pub")]

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mcs/class/Compat.ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib/BZip2/BZip2.cs Normal file
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// BZip2.cs
// Copyright (C) 2001 Mike Krueger
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.IO;
namespace ICSharpCode.SharpZipLib.BZip2
{
/// <summary>
/// Does all the compress and decompress pre-operation stuff.
/// Sets up the streams and file header characters.
/// Uses multiply overloaded methods to call for the compress/decompress.
/// </summary>
public sealed class BZip2
{
public static void Decompress(Stream instream, Stream outstream)
{
System.IO.Stream bos = outstream;
System.IO.Stream bis = instream;
BZip2InputStream bzis = new BZip2InputStream(bis);
int ch = bzis.ReadByte();
while (ch != -1) {
bos.WriteByte((byte)ch);
ch = bzis.ReadByte();
}
bos.Flush();
}
public static void Compress(Stream instream, Stream outstream, int blockSize)
{
System.IO.Stream bos = outstream;
System.IO.Stream bis = instream;
int ch = bis.ReadByte();
BZip2OutputStream bzos = new BZip2OutputStream(bos, blockSize);
while(ch != -1) {
bzos.WriteByte((byte)ch);
ch = bis.ReadByte();
}
bis.Close();
bzos.Close();
}
}
}
/* derived from a file which contained this license :
* Copyright (c) 1999-2001 Keiron Liddle, Aftex Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
*/

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// BZip2Constants.cs
// Copyright (C) 2001 Mike Krueger
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
namespace ICSharpCode.SharpZipLib.BZip2
{
/// <summary>
/// Base class for both the compress and decompress classes.
/// Holds common arrays, and static data.
/// </summary>
public sealed class BZip2Constants
{
public readonly static int[] rNums = {
619, 720, 127, 481, 931, 816, 813, 233, 566, 247,
985, 724, 205, 454, 863, 491, 741, 242, 949, 214,
733, 859, 335, 708, 621, 574, 73, 654, 730, 472,
419, 436, 278, 496, 867, 210, 399, 680, 480, 51,
878, 465, 811, 169, 869, 675, 611, 697, 867, 561,
862, 687, 507, 283, 482, 129, 807, 591, 733, 623,
150, 238, 59, 379, 684, 877, 625, 169, 643, 105,
170, 607, 520, 932, 727, 476, 693, 425, 174, 647,
73, 122, 335, 530, 442, 853, 695, 249, 445, 515,
909, 545, 703, 919, 874, 474, 882, 500, 594, 612,
641, 801, 220, 162, 819, 984, 589, 513, 495, 799,
161, 604, 958, 533, 221, 400, 386, 867, 600, 782,
382, 596, 414, 171, 516, 375, 682, 485, 911, 276,
98, 553, 163, 354, 666, 933, 424, 341, 533, 870,
227, 730, 475, 186, 263, 647, 537, 686, 600, 224,
469, 68, 770, 919, 190, 373, 294, 822, 808, 206,
184, 943, 795, 384, 383, 461, 404, 758, 839, 887,
715, 67, 618, 276, 204, 918, 873, 777, 604, 560,
951, 160, 578, 722, 79, 804, 96, 409, 713, 940,
652, 934, 970, 447, 318, 353, 859, 672, 112, 785,
645, 863, 803, 350, 139, 93, 354, 99, 820, 908,
609, 772, 154, 274, 580, 184, 79, 626, 630, 742,
653, 282, 762, 623, 680, 81, 927, 626, 789, 125,
411, 521, 938, 300, 821, 78, 343, 175, 128, 250,
170, 774, 972, 275, 999, 639, 495, 78, 352, 126,
857, 956, 358, 619, 580, 124, 737, 594, 701, 612,
669, 112, 134, 694, 363, 992, 809, 743, 168, 974,
944, 375, 748, 52, 600, 747, 642, 182, 862, 81,
344, 805, 988, 739, 511, 655, 814, 334, 249, 515,
897, 955, 664, 981, 649, 113, 974, 459, 893, 228,
433, 837, 553, 268, 926, 240, 102, 654, 459, 51,
686, 754, 806, 760, 493, 403, 415, 394, 687, 700,
946, 670, 656, 610, 738, 392, 760, 799, 887, 653,
978, 321, 576, 617, 626, 502, 894, 679, 243, 440,
680, 879, 194, 572, 640, 724, 926, 56, 204, 700,
707, 151, 457, 449, 797, 195, 791, 558, 945, 679,
297, 59, 87, 824, 713, 663, 412, 693, 342, 606,
134, 108, 571, 364, 631, 212, 174, 643, 304, 329,
343, 97, 430, 751, 497, 314, 983, 374, 822, 928,
140, 206, 73, 263, 980, 736, 876, 478, 430, 305,
170, 514, 364, 692, 829, 82, 855, 953, 676, 246,
369, 970, 294, 750, 807, 827, 150, 790, 288, 923,
804, 378, 215, 828, 592, 281, 565, 555, 710, 82,
896, 831, 547, 261, 524, 462, 293, 465, 502, 56,
661, 821, 976, 991, 658, 869, 905, 758, 745, 193,
768, 550, 608, 933, 378, 286, 215, 979, 792, 961,
61, 688, 793, 644, 986, 403, 106, 366, 905, 644,
372, 567, 466, 434, 645, 210, 389, 550, 919, 135,
780, 773, 635, 389, 707, 100, 626, 958, 165, 504,
920, 176, 193, 713, 857, 265, 203, 50, 668, 108,
645, 990, 626, 197, 510, 357, 358, 850, 858, 364,
936, 638
};
public readonly static int baseBlockSize = 100000;
public readonly static int MAX_ALPHA_SIZE = 258;
public readonly static int MAX_CODE_LEN = 23;
public readonly static int RUNA = 0;
public readonly static int RUNB = 1;
public readonly static int N_GROUPS = 6;
public readonly static int G_SIZE = 50;
public readonly static int N_ITERS = 4;
public readonly static int MAX_SELECTORS = (2 + (900000 / G_SIZE));
public readonly static int NUM_OVERSHOOT_BYTES = 20;
}
}
/* This file was derived from a file containing under this license:
*
* This file is a part of bzip2 and/or libbzip2, a program and
* library for lossless, block-sorting data compression.
*
* Copyright (C) 1996-1998 Julian R Seward. 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. The origin of this software must not be misrepresented; you must
* not claim that you wrote the original software. If you use this
* software in a product, an acknowledgment in the product
* documentation would be appreciated but is not required.
*
* 3. Altered source versions must be plainly marked as such, and must
* not be misrepresented as being the original software.
*
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* 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 THE AUTHOR 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.
*
* Java version ported by Keiron Liddle, Aftex Software <keiron@aftexsw.com> 1999-2001
*/

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2004-06-24 Raja R Harinath <rharinath@novell.com>
* AssemblyInfo.cs (AssemblyVersion): Set different version for the
net_2_0 profile.
2004-05-28 Duncan Mak <duncan@ximian.com>
* AssemblyInfo.cs: Use the new SharpZipLib.pub.
* Zip/Compression/DeflaterHuffman.cs (FlushBlock): Add some
parenthesis to help the generics compiler read this source.

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// Adler32.cs - Computes Adler32 data checksum of a data stream
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
namespace ICSharpCode.SharpZipLib.Checksums
{
/// <summary>
/// Computes Adler32 checksum for a stream of data. An Adler32
/// checksum is not as reliable as a CRC32 checksum, but a lot faster to
/// compute.
///
/// The specification for Adler32 may be found in RFC 1950.
/// ZLIB Compressed Data Format Specification version 3.3)
///
///
/// From that document:
///
/// "ADLER32 (Adler-32 checksum)
/// This contains a checksum value of the uncompressed data
/// (excluding any dictionary data) computed according to Adler-32
/// algorithm. This algorithm is a 32-bit extension and improvement
/// of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073
/// standard.
///
/// Adler-32 is composed of two sums accumulated per byte: s1 is
/// the sum of all bytes, s2 is the sum of all s1 values. Both sums
/// are done modulo 65521. s1 is initialized to 1, s2 to zero. The
/// Adler-32 checksum is stored as s2*65536 + s1 in most-
/// significant-byte first (network) order."
///
/// "8.2. The Adler-32 algorithm
///
/// The Adler-32 algorithm is much faster than the CRC32 algorithm yet
/// still provides an extremely low probability of undetected errors.
///
/// The modulo on unsigned long accumulators can be delayed for 5552
/// bytes, so the modulo operation time is negligible. If the bytes
/// are a, b, c, the second sum is 3a + 2b + c + 3, and so is position
/// and order sensitive, unlike the first sum, which is just a
/// checksum. That 65521 is prime is important to avoid a possible
/// large class of two-byte errors that leave the check unchanged.
/// (The Fletcher checksum uses 255, which is not prime and which also
/// makes the Fletcher check insensitive to single byte changes 0 -
/// 255.)
///
/// The sum s1 is initialized to 1 instead of zero to make the length
/// of the sequence part of s2, so that the length does not have to be
/// checked separately. (Any sequence of zeroes has a Fletcher
/// checksum of zero.)"
/// </summary>
/// <see cref="ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream"/>
/// <see cref="ICSharpCode.SharpZipLib.Zip.Compression.Streams.DeflaterOutputStream"/>
public sealed class Adler32 : IChecksum
{
/// <summary>
/// largest prime smaller than 65536
/// </summary>
readonly static uint BASE = 65521;
uint checksum;
/// <summary>
/// Returns the Adler32 data checksum computed so far.
/// </summary>
public long Value {
get {
return checksum;
}
}
/// <summary>
/// Creates a new instance of the <code>Adler32</code> class.
/// The checksum starts off with a value of 1.
/// </summary>
public Adler32()
{
Reset();
}
/// <summary>
/// Resets the Adler32 checksum to the initial value.
/// </summary>
public void Reset()
{
checksum = 1; //Initialize to 1
}
/// <summary>
/// Updates the checksum with the byte b.
/// </summary>
/// <param name="bval">
/// the data value to add. The high byte of the int is ignored.
/// </param>
public void Update(int bval)
{
//We could make a length 1 byte array and call update again, but I
//would rather not have that overhead
uint s1 = checksum & 0xFFFF;
uint s2 = checksum >> 16;
s1 = (s1 + ((uint)bval & 0xFF)) % BASE;
s2 = (s1 + s2) % BASE;
checksum = (s2 << 16) + s1;
}
/// <summary>
/// Updates the checksum with the bytes taken from the array.
/// </summary>
/// <param name="buffer">
/// buffer an array of bytes
/// </param>
public void Update(byte[] buffer)
{
Update(buffer, 0, buffer.Length);
}
/// <summary>
/// Updates the checksum with the bytes taken from the array.
/// </summary>
/// <param name="buf">
/// an array of bytes
/// </param>
/// <param name="off">
/// the start of the data used for this update
/// </param>
/// <param name="len">
/// the number of bytes to use for this update
/// </param>
public void Update(byte[] buf, int off, int len)
{
if (buf == null) {
throw new ArgumentNullException("buf");
}
if (off < 0 || len < 0 || off + len > buf.Length) {
throw new ArgumentOutOfRangeException();
}
//(By Per Bothner)
uint s1 = checksum & 0xFFFF;
uint s2 = checksum >> 16;
while (len > 0) {
// We can defer the modulo operation:
// s1 maximally grows from 65521 to 65521 + 255 * 3800
// s2 maximally grows by 3800 * median(s1) = 2090079800 < 2^31
int n = 3800;
if (n > len) {
n = len;
}
len -= n;
while (--n >= 0) {
s1 = s1 + (uint)(buf[off++] & 0xFF);
s2 = s2 + s1;
}
s1 %= BASE;
s2 %= BASE;
}
checksum = (s2 << 16) | s1;
}
}
}

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// CRC32.cs - Computes CRC32 data checksum of a data stream
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
namespace ICSharpCode.SharpZipLib.Checksums
{
/// <summary>
/// Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
/// x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
///
/// Polynomials over GF(2) are represented in binary, one bit per coefficient,
/// with the lowest powers in the most significant bit. Then adding polynomials
/// is just exclusive-or, and multiplying a polynomial by x is a right shift by
/// one. If we call the above polynomial p, and represent a byte as the
/// polynomial q, also with the lowest power in the most significant bit (so the
/// byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
/// where a mod b means the remainder after dividing a by b.
///
/// This calculation is done using the shift-register method of multiplying and
/// taking the remainder. The register is initialized to zero, and for each
/// incoming bit, x^32 is added mod p to the register if the bit is a one (where
/// x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
/// x (which is shifting right by one and adding x^32 mod p if the bit shifted
/// out is a one). We start with the highest power (least significant bit) of
/// q and repeat for all eight bits of q.
///
/// The table is simply the CRC of all possible eight bit values. This is all
/// the information needed to generate CRC's on data a byte at a time for all
/// combinations of CRC register values and incoming bytes.
/// </summary>
public sealed class Crc32 : IChecksum
{
readonly static uint CrcSeed = 0xFFFFFFFF;
readonly static uint[] CrcTable = new uint[] {
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419,
0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4,
0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07,
0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856,
0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4,
0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3,
0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A,
0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599,
0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190,
0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F,
0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E,
0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED,
0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3,
0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A,
0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5,
0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010,
0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17,
0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6,
0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615,
0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344,
0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A,
0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1,
0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C,
0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF,
0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE,
0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31,
0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C,
0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B,
0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1,
0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278,
0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7,
0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66,
0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605,
0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8,
0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B,
0x2D02EF8D
};
internal static uint ComputeCrc32(uint oldCrc, byte bval)
{
return (uint)(Crc32.CrcTable[(oldCrc ^ bval) & 0xFF] ^ (oldCrc >> 8));
}
/// <summary>
/// The crc data checksum so far.
/// </summary>
uint crc = 0;
/// <summary>
/// Returns the CRC32 data checksum computed so far.
/// </summary>
public long Value {
get {
return (long)crc;
}
set {
crc = (uint)value;
}
}
/// <summary>
/// Resets the CRC32 data checksum as if no update was ever called.
/// </summary>
public void Reset()
{
crc = 0;
}
/// <summary>
/// Updates the checksum with the int bval.
/// </summary>
/// <param name = "bval">
/// the byte is taken as the lower 8 bits of bval
/// </param>
public void Update(int bval)
{
crc ^= CrcSeed;
crc = CrcTable[(crc ^ bval) & 0xFF] ^ (crc >> 8);
crc ^= CrcSeed;
}
/// <summary>
/// Updates the checksum with the bytes taken from the array.
/// </summary>
/// <param name="buffer">
/// buffer an array of bytes
/// </param>
public void Update(byte[] buffer)
{
Update(buffer, 0, buffer.Length);
}
/// <summary>
/// Adds the byte array to the data checksum.
/// </summary>
/// <param name = "buf">
/// the buffer which contains the data
/// </param>
/// <param name = "off">
/// the offset in the buffer where the data starts
/// </param>
/// <param name = "len">
/// the length of the data
/// </param>
public void Update(byte[] buf, int off, int len)
{
if (buf == null) {
throw new ArgumentNullException("buf");
}
if (off < 0 || len < 0 || off + len > buf.Length) {
throw new ArgumentOutOfRangeException();
}
crc ^= CrcSeed;
while (--len >= 0) {
crc = CrcTable[(crc ^ buf[off++]) & 0xFF] ^ (crc >> 8);
}
crc ^= CrcSeed;
}
}
}

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// IChecksum.cs - Interface to compute a data checksum
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
namespace ICSharpCode.SharpZipLib.Checksums
{
/// <summary>
/// Interface to compute a data checksum used by checked input/output streams.
/// A data checksum can be updated by one byte or with a byte array. After each
/// update the value of the current checksum can be returned by calling
/// <code>getValue</code>. The complete checksum object can also be reset
/// so it can be used again with new data.
/// </summary>
public interface IChecksum
{
/// <summary>
/// Returns the data checksum computed so far.
/// </summary>
long Value
{
get;
}
/// <summary>
/// Resets the data checksum as if no update was ever called.
/// </summary>
void Reset();
/// <summary>
/// Adds one byte to the data checksum.
/// </summary>
/// <param name = "bval">
/// the data value to add. The high byte of the int is ignored.
/// </param>
void Update(int bval);
/// <summary>
/// Updates the data checksum with the bytes taken from the array.
/// </summary>
/// <param name="buffer">
/// buffer an array of bytes
/// </param>
void Update(byte[] buffer);
/// <summary>
/// Adds the byte array to the data checksum.
/// </summary>
/// <param name = "buf">
/// the buffer which contains the data
/// </param>
/// <param name = "off">
/// the offset in the buffer where the data starts
/// </param>
/// <param name = "len">
/// the length of the data
/// </param>
void Update(byte[] buf, int off, int len);
}
}

159
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// StrangeCRC.cs - computes a crc used in the bziplib ... I don't think that
// this is the 'standard' crc, please correct me, if I'm wrong
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
namespace ICSharpCode.SharpZipLib.Checksums
{
public class StrangeCRC : IChecksum
{
readonly static uint[] crc32Table = {
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,
0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,
0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
};
int globalCrc;
public StrangeCRC()
{
Reset();
}
public void Reset()
{
globalCrc = -1;
}
public long Value {
get {
return ~globalCrc;
}
}
public void Update(int inCh)
{
int temp = (globalCrc >> 24) ^ inCh;
if (temp < 0) {
temp = 256 + temp;
}
globalCrc = (int)((globalCrc << 8) ^ crc32Table[temp]);
}
public void Update(byte[] buf)
{
Update(buf, 0, buf.Length);
}
public void Update(byte[] buf, int off, int len)
{
if (buf == null) {
throw new ArgumentNullException("buf");
}
if (off < 0 || len < 0 || off + len > buf.Length) {
throw new ArgumentOutOfRangeException();
}
for (int i = 0; i < len; ++i) {
Update(buf[off++]);
}
}
}
}

68
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// GZIPConstants.cs
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
namespace ICSharpCode.SharpZipLib.GZip
{
/// <summary>
/// This class contains constants used for gzip.
/// </summary>
public class GZipConstants
{
/// <summary>
/// Magic number found at start of GZIP header
/// </summary>
public static readonly int GZIP_MAGIC = 0x1F8B;
/* The flag byte is divided into individual bits as follows:
bit 0 FTEXT
bit 1 FHCRC
bit 2 FEXTRA
bit 3 FNAME
bit 4 FCOMMENT
bit 5 reserved
bit 6 reserved
bit 7 reserved
*/
public const int FTEXT = 0x1;
public const int FHCRC = 0x2;
public const int FEXTRA = 0x4;
public const int FNAME = 0x8;
public const int FCOMMENT = 0x10;
}
}

336
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// GzipInputStream.cs
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
namespace ICSharpCode.SharpZipLib.GZip
{
/// <summary>
/// This filter stream is used to decompress a "GZIP" format stream.
/// The "GZIP" format is described baseInputStream RFC 1952.
///
/// author of the original java version : John Leuner
/// </summary>
/// <example> This sample shows how to unzip a gzipped file
/// <code>
/// using System;
/// using System.IO;
///
/// using NZlib.GZip;
///
/// class MainClass
/// {
/// public static void Main(string[] args)
/// {
/// Stream s = new GZipInputStream(File.OpenRead(args[0]));
/// FileStream fs = File.Create(Path.GetFileNameWithoutExtension(args[0]));
/// int size = 2048;
/// byte[] writeData = new byte[2048];
/// while (true) {
/// size = s.Read(writeData, 0, size);
/// if (size > 0) {
/// fs.Write(writeData, 0, size);
/// } else {
/// break;
/// }
/// }
/// s.Close();
/// }
/// }
/// </code>
/// </example>
public class GZipInputStream : InflaterInputStream
{
/// <summary>
/// CRC-32 value for uncompressed data
/// </summary>
protected Crc32 crc = new Crc32();
/// <summary>
/// Indicates end of stream
/// </summary>
protected bool eos;
// Have we read the GZIP header yet?
bool readGZIPHeader;
/// <summary>
/// Creates a GzipInputStream with the default buffer size
/// </summary>
/// <param name="baseInputStream">
/// The stream to read compressed data from (baseInputStream GZIP format)
/// </param>
public GZipInputStream(Stream baseInputStream) : this(baseInputStream, 4096)
{
}
/// <summary>
/// Creates a GZIPInputStream with the specified buffer size
/// </summary>
/// <param name="baseInputStream">
/// The stream to read compressed data from (baseInputStream GZIP format)
/// </param>
/// <param name="size">
/// Size of the buffer to use
/// </param>
public GZipInputStream(Stream baseInputStream, int size) : base(baseInputStream, new Inflater(true), size)
{
}
/// <summary>
/// Reads uncompressed data into an array of bytes
/// </summary>
/// <param name="buf">
/// the buffer to read uncompressed data into
/// </param>
/// <param name="offset">
/// the offset indicating where the data should be placed
/// </param>
/// <param name="len">
/// the number of uncompressed bytes to be read
/// </param>
public override int Read(byte[] buf, int offset, int len)
{
// We first have to slurp baseInputStream the GZIP header, then we feed all the
// rest of the data to the superclass.
//
// As we do that we continually update the CRC32. Once the data is
// finished, we check the CRC32
//
// This means we don't need our own buffer, as everything is done
// baseInputStream the superclass.
if (!readGZIPHeader) {
ReadHeader();
}
if (eos) {
return 0;
}
// System.err.println("GZIPIS.read(byte[], off, len ... " + offset + " and len " + len);
//We don't have to read the header, so we just grab data from the superclass
int numRead = base.Read(buf, offset, len);
if (numRead > 0) {
crc.Update(buf, offset, numRead);
}
if (inf.IsFinished) {
ReadFooter();
}
return numRead;
}
private void ReadHeader()
{
/* 1. Check the two magic bytes */
Crc32 headCRC = new Crc32();
int magic = baseInputStream.ReadByte();
if (magic < 0) {
eos = true;
return;
}
headCRC.Update(magic);
if (magic != (GZipConstants.GZIP_MAGIC >> 8)) {
throw new IOException("Error baseInputStream GZIP header, first byte doesn't match");
}
magic = baseInputStream.ReadByte();
if (magic != (GZipConstants.GZIP_MAGIC & 0xFF)) {
throw new IOException("Error baseInputStream GZIP header, second byte doesn't match");
}
headCRC.Update(magic);
/* 2. Check the compression type (must be 8) */
int CM = baseInputStream.ReadByte();
if (CM != 8) {
throw new IOException("Error baseInputStream GZIP header, data not baseInputStream deflate format");
}
headCRC.Update(CM);
/* 3. Check the flags */
int flags = baseInputStream.ReadByte();
if (flags < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
headCRC.Update(flags);
/* This flag byte is divided into individual bits as follows:
bit 0 FTEXT
bit 1 FHCRC
bit 2 FEXTRA
bit 3 FNAME
bit 4 FCOMMENT
bit 5 reserved
bit 6 reserved
bit 7 reserved
*/
/* 3.1 Check the reserved bits are zero */
if ((flags & 0xd0) != 0) {
throw new IOException("Reserved flag bits baseInputStream GZIP header != 0");
}
/* 4.-6. Skip the modification time, extra flags, and OS type */
for (int i=0; i< 6; i++) {
int readByte = baseInputStream.ReadByte();
if (readByte < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
headCRC.Update(readByte);
}
/* 7. Read extra field */
if ((flags & GZipConstants.FEXTRA) != 0) {
/* Skip subfield id */
for (int i=0; i< 2; i++) {
int readByte = baseInputStream.ReadByte();
if (readByte < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
headCRC.Update(readByte);
}
if (baseInputStream.ReadByte() < 0 || baseInputStream.ReadByte() < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
int len1, len2, extraLen;
len1 = baseInputStream.ReadByte();
len2 = baseInputStream.ReadByte();
if ((len1 < 0) || (len2 < 0)) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
headCRC.Update(len1);
headCRC.Update(len2);
extraLen = (len1 << 8) | len2;
for (int i = 0; i < extraLen;i++) {
int readByte = baseInputStream.ReadByte();
if (readByte < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
headCRC.Update(readByte);
}
}
/* 8. Read file name */
if ((flags & GZipConstants.FNAME) != 0) {
int readByte;
while ( (readByte = baseInputStream.ReadByte()) > 0) {
headCRC.Update(readByte);
}
if (readByte < 0) {
throw new Exception("Early EOF baseInputStream GZIP file name");
}
headCRC.Update(readByte);
}
/* 9. Read comment */
if ((flags & GZipConstants.FCOMMENT) != 0) {
int readByte;
while ( (readByte = baseInputStream.ReadByte()) > 0) {
headCRC.Update(readByte);
}
if (readByte < 0) {
throw new Exception("Early EOF baseInputStream GZIP comment");
}
headCRC.Update(readByte);
}
/* 10. Read header CRC */
if ((flags & GZipConstants.FHCRC) != 0) {
int tempByte;
int crcval = baseInputStream.ReadByte();
if (crcval < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
tempByte = baseInputStream.ReadByte();
if (tempByte < 0) {
throw new Exception("Early EOF baseInputStream GZIP header");
}
crcval = (crcval << 8) | tempByte;
if (crcval != ((int) headCRC.Value & 0xffff)) {
throw new IOException("Header CRC value mismatch");
}
}
readGZIPHeader = true;
//System.err.println("Read GZIP header");
}
private void ReadFooter()
{
byte[] footer = new byte[8];
int avail = inf.RemainingInput;
if (avail > 8) {
avail = 8;
}
System.Array.Copy(buf, len - inf.RemainingInput, footer, 0, avail);
int needed = 8 - avail;
while (needed > 0) {
int count = baseInputStream.Read(footer, 8-needed, needed);
if (count <= 0) {
throw new Exception("Early EOF baseInputStream GZIP footer");
}
needed -= count; //Jewel Jan 16
}
int crcval = (footer[0] & 0xff) | ((footer[1] & 0xff) << 8) | ((footer[2] & 0xff) << 16) | (footer[3] << 24);
if (crcval != (int) crc.Value) {
throw new IOException("GZIP crc sum mismatch, theirs \"" + crcval + "\" and ours \"" + (int) crc.Value);
}
int total = (footer[4] & 0xff) | ((footer[5] & 0xff) << 8) | ((footer[6] & 0xff) << 16) | (footer[7] << 24);
if (total != inf.TotalOut) {
throw new IOException("Number of bytes mismatch");
}
/* XXX Should we support multiple members.
* Difficult, since there may be some bytes still baseInputStream buf
*/
eos = true;
}
}
}

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// GzipOutputStream.cs
// Copyright (C) 2001 Mike Krueger
//
// This file was translated from java, it was part of the GNU Classpath
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
namespace ICSharpCode.SharpZipLib.GZip
{
/// <summary>
/// This filter stream is used to compress a stream into a "GZIP" stream.
/// The "GZIP" format is described in RFC 1952.
///
/// author of the original java version : John Leuner
/// </summary>
/// <example> This sample shows how to gzip a file
/// <code>
/// using System;
/// using System.IO;
///
/// using ICSharpCode.SharpZipLib.GZip; // -jr- corrected
///
/// class MainClass
/// {
/// public static void Main(string[] args)
/// {
/// Stream s = new GZipOutputStream(File.Create(args[0] + ".gz"));
/// FileStream fs = File.OpenRead(args[0]);
/// byte[] writeData = new byte[fs.Length];
/// fs.Read(writeData, 0, (int)fs.Length);
/// s.Write(writeData, 0, writeData.Length);
/// s.Close();
/// }
/// }
/// </code>
/// </example>
public class GZipOutputStream : DeflaterOutputStream
{
//Variables
/// <summary>
/// CRC-32 value for uncompressed data
/// </summary>
protected Crc32 crc = new Crc32();
// Constructors
/// <summary>
/// Creates a GzipOutputStream with the default buffer size
/// </summary>
/// <param name="baseOutputStream">
/// The stream to read data (to be compressed) from
/// </param>
public GZipOutputStream(Stream baseOutputStream) : this(baseOutputStream, 4096)
{
}
/// <summary>
/// Creates a GZIPOutputStream with the specified buffer size
/// </summary>
/// <param name="baseOutputStream">
/// The stream to read data (to be compressed) from
/// </param>
/// <param name="size">
/// Size of the buffer to use
/// </param>
public GZipOutputStream(Stream baseOutputStream, int size) : base(baseOutputStream, new Deflater(Deflater.DEFAULT_COMPRESSION, true), size)
{
WriteHeader();
// System.err.println("wrote GZIP header (" + gzipHeader.length + " bytes )");
}
void WriteHeader()
{
int mod_time = (int)(DateTime.Now.Ticks / 10000L); // Ticks give back 100ns intervals
byte[] gzipHeader = {
/* The two magic bytes */
(byte) (GZipConstants.GZIP_MAGIC >> 8), (byte) GZipConstants.GZIP_MAGIC,
/* The compression type */
(byte) Deflater.DEFLATED,
/* The flags (not set) */
0,
/* The modification time */
(byte) mod_time, (byte) (mod_time >> 8),
(byte) (mod_time >> 16), (byte) (mod_time >> 24),
/* The extra flags */
0,
/* The OS type (unknown) */
(byte) 255
};
baseOutputStream.Write(gzipHeader, 0, gzipHeader.Length);
}
public override void Write(byte[] buf, int off, int len)
{
crc.Update(buf, off, len);
base.Write(buf, off, len);
}
/// <summary>
/// Writes remaining compressed output data to the output stream
/// and closes it.
/// </summary>
public override void Close()
{
Finish();
baseOutputStream.Close();
}
public override void Finish()
{
base.Finish();
int totalin = def.TotalIn;
int crcval = (int) (crc.Value & 0xffffffff);
// System.err.println("CRC val is " + Integer.toHexString( crcval ) + " and length " + Integer.toHexString(totalin));
byte[] gzipFooter = {
(byte) crcval, (byte) (crcval >> 8),
(byte) (crcval >> 16), (byte) (crcval >> 24),
(byte) totalin, (byte) (totalin >> 8),
(byte) (totalin >> 16), (byte) (totalin >> 24)
};
baseOutputStream.Write(gzipFooter, 0, gzipFooter.Length);
// System.err.println("wrote GZIP trailer (" + gzipFooter.length + " bytes )");
}
}
}

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// InvalidHeaderException.cs
// Copyright (C) 2001 Mike Krueger
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
namespace ICSharpCode.SharpZipLib.Tar {
/// <summary>
/// This exception is used to indicate that there is a problem
/// with a TAR archive header.
/// </summary>
public class InvalidHeaderException : System.IO.IOException
{
public InvalidHeaderException()
{
}
public InvalidHeaderException(string msg) : base(msg)
{
}
}
}
/* The original Java file had this header:
** Authored by Timothy Gerard Endres
** <mailto:time@gjt.org> <http://www.trustice.com>
**
** This work has been placed into the public domain.
** You may use this work in any way and for any purpose you wish.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE.
**
*/

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// TarOutputStream.cs
// Copyright (C) 2001 Mike Krueger
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give you
// permission to link this library with independent modules to produce an
// executable, regardless of the license terms of these independent
// modules, and to copy and distribute the resulting executable under
// terms of your choice, provided that you also meet, for each linked
// independent module, the terms and conditions of the license of that
// module. An independent module is a module which is not derived from
// or based on this library. If you modify this library, you may extend
// this exception to your version of the library, but you are not
// obligated to do so. If you do not wish to do so, delete this
// exception statement from your version.
using System;
using System.IO;
using System.Text;
namespace ICSharpCode.SharpZipLib.Tar
{
/// <summary>
/// The TarOutputStream writes a UNIX tar archive as an OutputStream.
/// Methods are provided to put entries, and then write their contents
/// by writing to this stream using write().
/// </summary>
/// public
public class TarOutputStream : Stream
{
protected bool debug;
protected int currSize;
protected int currBytes;
protected byte[] blockBuf;
protected int assemLen;
protected byte[] assemBuf;
protected TarBuffer buffer;
protected Stream outputStream;
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override bool CanRead
{
get
{
return outputStream.CanRead;
}
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override bool CanSeek
{
get
{
return outputStream.CanSeek; // -jr- Should be false?
}
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override bool CanWrite
{
get
{
return outputStream.CanWrite;
}
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override long Length
{
get
{
return outputStream.Length;
}
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override long Position
{
get
{
return outputStream.Position;
}
set
{
outputStream.Position = value;
}
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override long Seek(long offset, SeekOrigin origin)
{
return outputStream.Seek(offset, origin);
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override void SetLength(long val)
{
outputStream.SetLength(val);
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override int ReadByte()
{
return outputStream.ReadByte();
}
/// <summary>
/// I needed to implement the abstract member.
/// </summary>
public override int Read(byte[] b, int off, int len)
{
return outputStream.Read(b, off, len);
}
public override void Flush()
{
outputStream.Flush();
}
public TarOutputStream(Stream outputStream) : this(outputStream, TarBuffer.DefaultBlockFactor)
{
}
public TarOutputStream(Stream outputStream, int blockFactor)
{
this.outputStream = outputStream;
this.buffer = TarBuffer.CreateOutputTarBuffer(outputStream, blockFactor);
this.debug = false;
this.assemLen = 0;
this.assemBuf = new byte[TarBuffer.BlockSize];
this.blockBuf = new byte[TarBuffer.BlockSize];
}
/// <summary>
/// Sets the debugging flag.
/// </summary>
/// <param name = "debugFlag">
/// True to turn on debugging.
/// </param>
public void SetDebug(bool debugFlag)
{
this.debug = debugFlag;
SetBufferDebug(debugFlag);
}
public void SetBufferDebug(bool debug)
{
this.buffer.SetDebug(debug);
}
/// <summary>
/// Ends the TAR archive without closing the underlying OutputStream.
/// The result is that the EOF record of nulls is written.
/// </summary>
public void Finish()
{
this.WriteEOFRecord();
}
/// <summary>
/// Ends the TAR archive and closes the underlying OutputStream.
/// This means that finish() is called followed by calling the
/// TarBuffer's close().
/// </summary>
public override void Close()
{
this.Finish();
this.buffer.Close();
}
/// <summary>
/// Get the record size being used by this stream's TarBuffer.
/// </summary>
/// <returns>
/// The TarBuffer record size.
/// </returns>
public int GetRecordSize()
{
return this.buffer.GetRecordSize();
}
/// <summary>
/// Put an entry on the output stream. This writes the entry's
/// header and positions the output stream for writing
/// the contents of the entry. Once this method is called, the
/// stream is ready for calls to write() to write the entry's
/// contents. Once the contents are written, closeEntry()
/// <B>MUST</B> be called to ensure that all buffered data
/// is completely written to the output stream.
/// </summary>
/// <param name="entry">
/// The TarEntry to be written to the archive.
/// </param>
public void PutNextEntry(TarEntry entry)
{
if (entry.TarHeader.name.Length > TarHeader.NAMELEN)
{
TarHeader longHeader = new TarHeader();
longHeader.typeFlag = TarHeader.LF_GNU_LONGNAME;
longHeader.name.Append("././@LongLink");
longHeader.userId = 0;
longHeader.groupId = 0;
longHeader.groupName.Length = 0;
longHeader.userName.Length = 0;
longHeader.linkName.Length = 0;
longHeader.size = entry.TarHeader.name.Length;
Console.WriteLine("TarOutputStream: PutNext entry Long name found size = " + longHeader.size); // DEBUG
longHeader.WriteHeader(this.blockBuf);
this.buffer.WriteBlock(this.blockBuf); // Add special long filename header block
int nameCharIndex = 0;
while (nameCharIndex < entry.TarHeader.name.Length)
{
TarHeader.GetNameBytes(entry.TarHeader.name, nameCharIndex, this.blockBuf, 0, TarBuffer.BlockSize);
nameCharIndex += TarBuffer.BlockSize;
this.buffer.WriteBlock(this.blockBuf);
}
}
entry.WriteEntryHeader(this.blockBuf);
this.buffer.WriteBlock(this.blockBuf);
this.currBytes = 0;
this.currSize = entry.IsDirectory ? 0 : (int)entry.Size;
}
/// <summary>
/// Close an entry. This method MUST be called for all file
/// entries that contain data. The reason is that we must
/// buffer data written to the stream in order to satisfy
/// the buffer's block based writes. Thus, there may be
/// data fragments still being assembled that must be written
/// to the output stream before this entry is closed and the
/// next entry written.
/// </summary>
public void CloseEntry()
{
if (this.assemLen > 0)
{
for (int i = this.assemLen; i < this.assemBuf.Length; ++i)
{
this.assemBuf[i] = 0;
}
this.buffer.WriteBlock(this.assemBuf);
this.currBytes += this.assemLen;
this.assemLen = 0;
}
if (this.currBytes < this.currSize)
{
throw new IOException("entry closed at '" + this.currBytes + "' before the '" + this.currSize + "' bytes specified in the header were written");
}
}
/// <summary>
/// Writes a byte to the current tar archive entry.
/// This method simply calls Write(byte[], int, int).
/// </summary>
/// <param name="b">
/// The byte written.
/// </param>
public override void WriteByte(byte b)
{
this.Write(new byte[] { b }, 0, 1);
}
/// <summary>
/// Writes bytes to the current tar archive entry. This method
/// is aware of the current entry and will throw an exception if
/// you attempt to write bytes past the length specified for the
/// current entry. The method is also (painfully) aware of the
/// record buffering required by TarBuffer, and manages buffers
/// that are not a multiple of recordsize in length, including
/// assembling records from small buffers.
/// </summary>
/// <param name = "wBuf">
/// The buffer to write to the archive.
/// </param>
/// <param name = "wOffset">
/// The offset in the buffer from which to get bytes.
/// </param>
/// <param name = "numToWrite">
/// The number of bytes to write.
/// </param>
public override void Write(byte[] wBuf, int wOffset, int numToWrite)
{
if ((this.currBytes + numToWrite) > this.currSize)
{
throw new IOException("request to write '" + numToWrite + "' bytes exceeds size in header of '" + this.currSize + "' bytes");
}
//
// We have to deal with assembly!!!
// The programmer can be writing little 32 byte chunks for all
// we know, and we must assemble complete records for writing.
// REVIEW Maybe this should be in TarBuffer? Could that help to
// eliminate some of the buffer copying.
//
if (this.assemLen > 0)
{
if ((this.assemLen + numToWrite ) >= this.blockBuf.Length)
{
int aLen = this.blockBuf.Length - this.assemLen;
Array.Copy(this.assemBuf, 0, this.blockBuf, 0, this.assemLen);
Array.Copy(wBuf, wOffset, this.blockBuf, this.assemLen, aLen);
this.buffer.WriteBlock(this.blockBuf);
this.currBytes += this.blockBuf.Length;
wOffset += aLen;
numToWrite -= aLen;
this.assemLen = 0;
}
else
{// ( (this.assemLen + numToWrite ) < this.blockBuf.length )
Array.Copy(wBuf, wOffset, this.assemBuf, this.assemLen, numToWrite);
wOffset += numToWrite;
this.assemLen += numToWrite;
numToWrite -= numToWrite;
}
}
//
// When we get here we have EITHER:
// o An empty "assemble" buffer.
// o No bytes to write (numToWrite == 0)
//
while (numToWrite > 0)
{
if (numToWrite < this.blockBuf.Length)
{
Array.Copy(wBuf, wOffset, this.assemBuf, this.assemLen, numToWrite);
this.assemLen += numToWrite;
break;
}
this.buffer.WriteBlock(wBuf, wOffset);
int num = this.blockBuf.Length;
this.currBytes += num;
numToWrite -= num;
wOffset += num;
}
}
/// <summary>
/// Write an EOF (end of archive) record to the tar archive.
/// An EOF record consists of a record of all zeros.
/// </summary>
void WriteEOFRecord()
{
for (int i = 0; i < this.blockBuf.Length; ++i)
{
this.blockBuf[i] = 0;
}
this.buffer.WriteBlock(this.blockBuf);
}
}
}
/* The original Java file had this header:
** Authored by Timothy Gerard Endres
** <mailto:time@gjt.org> <http://www.trustice.com>
**
** This work has been placed into the public domain.
** You may use this work in any way and for any purpose you wish.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE.
**
*/

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