root/trunk/Updater/ICSharpCode.SharpZipLib/BZip2/BZip2Constants.cs @ 597

// 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>
        /// Defines internal values for both compression and decompression
        /// </summary>
        internal sealed class BZip2Constants
        {
                /// <summary>
                /// Random numbers used to randomise repetitive blocks
                /// </summary>
                public readonly static int[] RandomNumbers = {
                        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
                };

                /// <summary>
                /// When multiplied by compression parameter (1-9) gives the block size for compression
                /// 9 gives the best compresssion but uses the most memory.
                /// </summary>          
                public const int BaseBlockSize = 100000;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int MaximumAlphaSize = 258;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int MaximumCodeLength = 23;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int RunA = 0;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int RunB = 1;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int GroupCount = 6;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int GroupSize = 50;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int NumberOfIterations = 4;
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int MaximumSelectors = (2 + (900000 / GroupSize));
                
                /// <summary>
                /// Backend constant
                /// </summary>
                public const int OvershootBytes = 20;
                
                private BZip2Constants()
                {
                }
        }
}
        
/* This file was derived from a file containing 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
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java version ported by Keiron Liddle, Aftex Software <keiron@aftexsw.com> 1999-2001
 */