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00040 using System;
00041
00042 namespace ICSharpCode.SharpZipLib.Zip.Compression
00043 {
00044
00048 public class DeflaterConstants
00049 {
00053 public const bool DEBUGGING = false;
00054
00058 public const int STORED_BLOCK = 0;
00059
00063 public const int STATIC_TREES = 1;
00064
00068 public const int DYN_TREES = 2;
00069
00073 public const int PRESET_DICT = 0x20;
00074
00078 public const int DEFAULT_MEM_LEVEL = 8;
00079
00083 public const int MAX_MATCH = 258;
00084
00088 public const int MIN_MATCH = 3;
00089
00093 public const int MAX_WBITS = 15;
00094
00098 public const int WSIZE = 1 << MAX_WBITS;
00099
00103 public const int WMASK = WSIZE - 1;
00104
00108 public const int HASH_BITS = DEFAULT_MEM_LEVEL + 7;
00109
00113 public const int HASH_SIZE = 1 << HASH_BITS;
00114
00118 public const int HASH_MASK = HASH_SIZE - 1;
00119
00123 public const int HASH_SHIFT = (HASH_BITS + MIN_MATCH - 1) / MIN_MATCH;
00124
00128 public const int MIN_LOOKAHEAD = MAX_MATCH + MIN_MATCH + 1;
00129
00133 public const int MAX_DIST = WSIZE - MIN_LOOKAHEAD;
00134
00138 public const int PENDING_BUF_SIZE = 1 << (DEFAULT_MEM_LEVEL + 8);
00139
00143 public static int MAX_BLOCK_SIZE = Math.Min(65535, PENDING_BUF_SIZE - 5);
00144
00148 public const int DEFLATE_STORED = 0;
00149
00153 public const int DEFLATE_FAST = 1;
00154
00158 public const int DEFLATE_SLOW = 2;
00159
00163 public static int[] GOOD_LENGTH = { 0, 4, 4, 4, 4, 8, 8, 8, 32, 32 };
00164
00168 public static int[] MAX_LAZY = { 0, 4, 5, 6, 4, 16, 16, 32, 128, 258 };
00169
00173 public static int[] NICE_LENGTH = { 0, 8, 16, 32, 16, 32, 128, 128, 258, 258 };
00174
00178 public static int[] MAX_CHAIN = { 0, 4, 8, 32, 16, 32, 128, 256, 1024, 4096 };
00179
00183 public static int[] COMPR_FUNC = { 0, 1, 1, 1, 1, 2, 2, 2, 2, 2 };
00184
00185 }
00186 }