| | 1 | | namespace ICSharpCode.SharpZipLib.BZip2 |
| | 2 | | { |
| | 3 | | /// <summary> |
| | 4 | | /// Defines internal values for both compression and decompression |
| | 5 | | /// </summary> |
| | 6 | | internal sealed class BZip2Constants |
| | 7 | | { |
| | 8 | | /// <summary> |
| | 9 | | /// Random numbers used to randomise repetitive blocks |
| | 10 | | /// </summary> |
| 0 | 11 | | public readonly static int[] RandomNumbers = { |
| 0 | 12 | | 619, 720, 127, 481, 931, 816, 813, 233, 566, 247, |
| 0 | 13 | | 985, 724, 205, 454, 863, 491, 741, 242, 949, 214, |
| 0 | 14 | | 733, 859, 335, 708, 621, 574, 73, 654, 730, 472, |
| 0 | 15 | | 419, 436, 278, 496, 867, 210, 399, 680, 480, 51, |
| 0 | 16 | | 878, 465, 811, 169, 869, 675, 611, 697, 867, 561, |
| 0 | 17 | | 862, 687, 507, 283, 482, 129, 807, 591, 733, 623, |
| 0 | 18 | | 150, 238, 59, 379, 684, 877, 625, 169, 643, 105, |
| 0 | 19 | | 170, 607, 520, 932, 727, 476, 693, 425, 174, 647, |
| 0 | 20 | | 73, 122, 335, 530, 442, 853, 695, 249, 445, 515, |
| 0 | 21 | | 909, 545, 703, 919, 874, 474, 882, 500, 594, 612, |
| 0 | 22 | | 641, 801, 220, 162, 819, 984, 589, 513, 495, 799, |
| 0 | 23 | | 161, 604, 958, 533, 221, 400, 386, 867, 600, 782, |
| 0 | 24 | | 382, 596, 414, 171, 516, 375, 682, 485, 911, 276, |
| 0 | 25 | | 98, 553, 163, 354, 666, 933, 424, 341, 533, 870, |
| 0 | 26 | | 227, 730, 475, 186, 263, 647, 537, 686, 600, 224, |
| 0 | 27 | | 469, 68, 770, 919, 190, 373, 294, 822, 808, 206, |
| 0 | 28 | | 184, 943, 795, 384, 383, 461, 404, 758, 839, 887, |
| 0 | 29 | | 715, 67, 618, 276, 204, 918, 873, 777, 604, 560, |
| 0 | 30 | | 951, 160, 578, 722, 79, 804, 96, 409, 713, 940, |
| 0 | 31 | | 652, 934, 970, 447, 318, 353, 859, 672, 112, 785, |
| 0 | 32 | | 645, 863, 803, 350, 139, 93, 354, 99, 820, 908, |
| 0 | 33 | | 609, 772, 154, 274, 580, 184, 79, 626, 630, 742, |
| 0 | 34 | | 653, 282, 762, 623, 680, 81, 927, 626, 789, 125, |
| 0 | 35 | | 411, 521, 938, 300, 821, 78, 343, 175, 128, 250, |
| 0 | 36 | | 170, 774, 972, 275, 999, 639, 495, 78, 352, 126, |
| 0 | 37 | | 857, 956, 358, 619, 580, 124, 737, 594, 701, 612, |
| 0 | 38 | | 669, 112, 134, 694, 363, 992, 809, 743, 168, 974, |
| 0 | 39 | | 944, 375, 748, 52, 600, 747, 642, 182, 862, 81, |
| 0 | 40 | | 344, 805, 988, 739, 511, 655, 814, 334, 249, 515, |
| 0 | 41 | | 897, 955, 664, 981, 649, 113, 974, 459, 893, 228, |
| 0 | 42 | | 433, 837, 553, 268, 926, 240, 102, 654, 459, 51, |
| 0 | 43 | | 686, 754, 806, 760, 493, 403, 415, 394, 687, 700, |
| 0 | 44 | | 946, 670, 656, 610, 738, 392, 760, 799, 887, 653, |
| 0 | 45 | | 978, 321, 576, 617, 626, 502, 894, 679, 243, 440, |
| 0 | 46 | | 680, 879, 194, 572, 640, 724, 926, 56, 204, 700, |
| 0 | 47 | | 707, 151, 457, 449, 797, 195, 791, 558, 945, 679, |
| 0 | 48 | | 297, 59, 87, 824, 713, 663, 412, 693, 342, 606, |
| 0 | 49 | | 134, 108, 571, 364, 631, 212, 174, 643, 304, 329, |
| 0 | 50 | | 343, 97, 430, 751, 497, 314, 983, 374, 822, 928, |
| 0 | 51 | | 140, 206, 73, 263, 980, 736, 876, 478, 430, 305, |
| 0 | 52 | | 170, 514, 364, 692, 829, 82, 855, 953, 676, 246, |
| 0 | 53 | | 369, 970, 294, 750, 807, 827, 150, 790, 288, 923, |
| 0 | 54 | | 804, 378, 215, 828, 592, 281, 565, 555, 710, 82, |
| 0 | 55 | | 896, 831, 547, 261, 524, 462, 293, 465, 502, 56, |
| 0 | 56 | | 661, 821, 976, 991, 658, 869, 905, 758, 745, 193, |
| 0 | 57 | | 768, 550, 608, 933, 378, 286, 215, 979, 792, 961, |
| 0 | 58 | | 61, 688, 793, 644, 986, 403, 106, 366, 905, 644, |
| 0 | 59 | | 372, 567, 466, 434, 645, 210, 389, 550, 919, 135, |
| 0 | 60 | | 780, 773, 635, 389, 707, 100, 626, 958, 165, 504, |
| 0 | 61 | | 920, 176, 193, 713, 857, 265, 203, 50, 668, 108, |
| 0 | 62 | | 645, 990, 626, 197, 510, 357, 358, 850, 858, 364, |
| 0 | 63 | | 936, 638 |
| 0 | 64 | | }; |
| | 65 | |
|
| | 66 | | /// <summary> |
| | 67 | | /// When multiplied by compression parameter (1-9) gives the block size for compression |
| | 68 | | /// 9 gives the best compression but uses the most memory. |
| | 69 | | /// </summary> |
| | 70 | | public const int BaseBlockSize = 100000; |
| | 71 | |
|
| | 72 | | /// <summary> |
| | 73 | | /// Backend constant |
| | 74 | | /// </summary> |
| | 75 | | public const int MaximumAlphaSize = 258; |
| | 76 | |
|
| | 77 | | /// <summary> |
| | 78 | | /// Backend constant |
| | 79 | | /// </summary> |
| | 80 | | public const int MaximumCodeLength = 23; |
| | 81 | |
|
| | 82 | | /// <summary> |
| | 83 | | /// Backend constant |
| | 84 | | /// </summary> |
| | 85 | | public const int RunA = 0; |
| | 86 | |
|
| | 87 | | /// <summary> |
| | 88 | | /// Backend constant |
| | 89 | | /// </summary> |
| | 90 | | public const int RunB = 1; |
| | 91 | |
|
| | 92 | | /// <summary> |
| | 93 | | /// Backend constant |
| | 94 | | /// </summary> |
| | 95 | | public const int GroupCount = 6; |
| | 96 | |
|
| | 97 | | /// <summary> |
| | 98 | | /// Backend constant |
| | 99 | | /// </summary> |
| | 100 | | public const int GroupSize = 50; |
| | 101 | |
|
| | 102 | | /// <summary> |
| | 103 | | /// Backend constant |
| | 104 | | /// </summary> |
| | 105 | | public const int NumberOfIterations = 4; |
| | 106 | |
|
| | 107 | | /// <summary> |
| | 108 | | /// Backend constant |
| | 109 | | /// </summary> |
| | 110 | | public const int MaximumSelectors = (2 + (900000 / GroupSize)); |
| | 111 | |
|
| | 112 | | /// <summary> |
| | 113 | | /// Backend constant |
| | 114 | | /// </summary> |
| | 115 | | public const int OvershootBytes = 20; |
| | 116 | |
|
| 0 | 117 | | private BZip2Constants() |
| | 118 | | { |
| 0 | 119 | | } |
| | 120 | | } |
| | 121 | | } |