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- using System;
- using Interop=System.Runtime.InteropServices;
- namespace BestHTTP.Decompression.Zlib
- {
-
-
-
-
-
-
- public enum FlushType
- {
-
- None = 0,
-
-
-
-
-
- Partial,
-
-
-
-
-
-
-
-
-
- Sync,
-
-
-
-
-
-
-
- Full,
-
- Finish,
- }
-
-
-
- public enum CompressionLevel
- {
-
-
-
-
-
- None= 0,
-
-
-
- Level0 = 0,
-
-
-
- BestSpeed = 1,
-
-
-
- Level1 = 1,
-
-
-
- Level2 = 2,
-
-
-
- Level3 = 3,
-
-
-
- Level4 = 4,
-
-
-
- Level5 = 5,
-
-
-
- Default = 6,
-
-
-
- Level6 = 6,
-
-
-
- Level7 = 7,
-
-
-
- Level8 = 8,
-
-
-
-
- BestCompression = 9,
-
-
-
- Level9 = 9,
- }
-
-
-
-
-
- public enum CompressionStrategy
- {
-
-
-
- Default = 0,
-
-
-
-
-
-
-
- Filtered = 1,
-
-
-
-
- HuffmanOnly = 2,
- }
-
-
-
- public enum CompressionMode
- {
-
-
-
- Compress= 0,
-
-
-
- Decompress = 1,
- }
-
-
-
- [Interop.GuidAttribute("ebc25cf6-9120-4283-b972-0e5520d0000E")]
- internal class ZlibException : System.Exception
- {
-
-
-
-
- public ZlibException()
- : base()
- {
- }
-
-
-
-
- public ZlibException(System.String s)
- : base(s)
- {
- }
- }
- internal class SharedUtils
- {
-
-
-
-
-
-
- public static int URShift(int number, int bits)
- {
- return (int)((uint)number >> bits);
- }
- #if NOT
-
-
-
-
-
-
- public static long URShift(long number, int bits)
- {
- return (long) ((UInt64)number >> bits);
- }
- #endif
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- public static System.Int32 ReadInput(System.IO.TextReader sourceTextReader, byte[] target, int start, int count)
- {
-
- if (target.Length == 0) return 0;
- char[] charArray = new char[target.Length];
- int bytesRead = sourceTextReader.Read(charArray, start, count);
-
- if (bytesRead == 0) return -1;
- for (int index = start; index < start + bytesRead; index++)
- target[index] = (byte)charArray[index];
- return bytesRead;
- }
- internal static byte[] ToByteArray(System.String sourceString)
- {
- return System.Text.UTF8Encoding.UTF8.GetBytes(sourceString);
- }
- internal static char[] ToCharArray(byte[] byteArray)
- {
- return System.Text.UTF8Encoding.UTF8.GetChars(byteArray);
- }
- }
- internal static class InternalConstants
- {
- internal static readonly int MAX_BITS = 15;
- internal static readonly int BL_CODES = 19;
- internal static readonly int D_CODES = 30;
- internal static readonly int LITERALS = 256;
- internal static readonly int LENGTH_CODES = 29;
- internal static readonly int L_CODES = (LITERALS + 1 + LENGTH_CODES);
-
- internal static readonly int MAX_BL_BITS = 7;
-
- internal static readonly int REP_3_6 = 16;
-
- internal static readonly int REPZ_3_10 = 17;
-
- internal static readonly int REPZ_11_138 = 18;
- }
- internal sealed class StaticTree
- {
- internal static readonly short[] lengthAndLiteralsTreeCodes = new short[] {
- 12, 8, 140, 8, 76, 8, 204, 8, 44, 8, 172, 8, 108, 8, 236, 8,
- 28, 8, 156, 8, 92, 8, 220, 8, 60, 8, 188, 8, 124, 8, 252, 8,
- 2, 8, 130, 8, 66, 8, 194, 8, 34, 8, 162, 8, 98, 8, 226, 8,
- 18, 8, 146, 8, 82, 8, 210, 8, 50, 8, 178, 8, 114, 8, 242, 8,
- 10, 8, 138, 8, 74, 8, 202, 8, 42, 8, 170, 8, 106, 8, 234, 8,
- 26, 8, 154, 8, 90, 8, 218, 8, 58, 8, 186, 8, 122, 8, 250, 8,
- 6, 8, 134, 8, 70, 8, 198, 8, 38, 8, 166, 8, 102, 8, 230, 8,
- 22, 8, 150, 8, 86, 8, 214, 8, 54, 8, 182, 8, 118, 8, 246, 8,
- 14, 8, 142, 8, 78, 8, 206, 8, 46, 8, 174, 8, 110, 8, 238, 8,
- 30, 8, 158, 8, 94, 8, 222, 8, 62, 8, 190, 8, 126, 8, 254, 8,
- 1, 8, 129, 8, 65, 8, 193, 8, 33, 8, 161, 8, 97, 8, 225, 8,
- 17, 8, 145, 8, 81, 8, 209, 8, 49, 8, 177, 8, 113, 8, 241, 8,
- 9, 8, 137, 8, 73, 8, 201, 8, 41, 8, 169, 8, 105, 8, 233, 8,
- 25, 8, 153, 8, 89, 8, 217, 8, 57, 8, 185, 8, 121, 8, 249, 8,
- 5, 8, 133, 8, 69, 8, 197, 8, 37, 8, 165, 8, 101, 8, 229, 8,
- 21, 8, 149, 8, 85, 8, 213, 8, 53, 8, 181, 8, 117, 8, 245, 8,
- 13, 8, 141, 8, 77, 8, 205, 8, 45, 8, 173, 8, 109, 8, 237, 8,
- 29, 8, 157, 8, 93, 8, 221, 8, 61, 8, 189, 8, 125, 8, 253, 8,
- 19, 9, 275, 9, 147, 9, 403, 9, 83, 9, 339, 9, 211, 9, 467, 9,
- 51, 9, 307, 9, 179, 9, 435, 9, 115, 9, 371, 9, 243, 9, 499, 9,
- 11, 9, 267, 9, 139, 9, 395, 9, 75, 9, 331, 9, 203, 9, 459, 9,
- 43, 9, 299, 9, 171, 9, 427, 9, 107, 9, 363, 9, 235, 9, 491, 9,
- 27, 9, 283, 9, 155, 9, 411, 9, 91, 9, 347, 9, 219, 9, 475, 9,
- 59, 9, 315, 9, 187, 9, 443, 9, 123, 9, 379, 9, 251, 9, 507, 9,
- 7, 9, 263, 9, 135, 9, 391, 9, 71, 9, 327, 9, 199, 9, 455, 9,
- 39, 9, 295, 9, 167, 9, 423, 9, 103, 9, 359, 9, 231, 9, 487, 9,
- 23, 9, 279, 9, 151, 9, 407, 9, 87, 9, 343, 9, 215, 9, 471, 9,
- 55, 9, 311, 9, 183, 9, 439, 9, 119, 9, 375, 9, 247, 9, 503, 9,
- 15, 9, 271, 9, 143, 9, 399, 9, 79, 9, 335, 9, 207, 9, 463, 9,
- 47, 9, 303, 9, 175, 9, 431, 9, 111, 9, 367, 9, 239, 9, 495, 9,
- 31, 9, 287, 9, 159, 9, 415, 9, 95, 9, 351, 9, 223, 9, 479, 9,
- 63, 9, 319, 9, 191, 9, 447, 9, 127, 9, 383, 9, 255, 9, 511, 9,
- 0, 7, 64, 7, 32, 7, 96, 7, 16, 7, 80, 7, 48, 7, 112, 7,
- 8, 7, 72, 7, 40, 7, 104, 7, 24, 7, 88, 7, 56, 7, 120, 7,
- 4, 7, 68, 7, 36, 7, 100, 7, 20, 7, 84, 7, 52, 7, 116, 7,
- 3, 8, 131, 8, 67, 8, 195, 8, 35, 8, 163, 8, 99, 8, 227, 8
- };
- internal static readonly short[] distTreeCodes = new short[] {
- 0, 5, 16, 5, 8, 5, 24, 5, 4, 5, 20, 5, 12, 5, 28, 5,
- 2, 5, 18, 5, 10, 5, 26, 5, 6, 5, 22, 5, 14, 5, 30, 5,
- 1, 5, 17, 5, 9, 5, 25, 5, 5, 5, 21, 5, 13, 5, 29, 5,
- 3, 5, 19, 5, 11, 5, 27, 5, 7, 5, 23, 5 };
- internal static readonly StaticTree Literals;
- internal static readonly StaticTree Distances;
- internal static readonly StaticTree BitLengths;
- internal short[] treeCodes;
- internal int[] extraBits;
- internal int extraBase;
- internal int elems;
- internal int maxLength;
- private StaticTree(short[] treeCodes, int[] extraBits, int extraBase, int elems, int maxLength)
- {
- this.treeCodes = treeCodes;
- this.extraBits = extraBits;
- this.extraBase = extraBase;
- this.elems = elems;
- this.maxLength = maxLength;
- }
- static StaticTree()
- {
- Literals = new StaticTree(lengthAndLiteralsTreeCodes, ZTree.ExtraLengthBits, InternalConstants.LITERALS + 1, InternalConstants.L_CODES, InternalConstants.MAX_BITS);
- Distances = new StaticTree(distTreeCodes, ZTree.ExtraDistanceBits, 0, InternalConstants.D_CODES, InternalConstants.MAX_BITS);
- BitLengths = new StaticTree(null, ZTree.extra_blbits, 0, InternalConstants.BL_CODES, InternalConstants.MAX_BL_BITS);
- }
- }
-
-
-
-
-
-
-
-
-
-
-
- public sealed class Adler
- {
-
- private static readonly uint BASE = 65521;
-
- private static readonly int NMAX = 5552;
- #pragma warning disable 3001
- #pragma warning disable 3002
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- public static uint Adler32(uint adler, byte[] buf, int index, int len)
- {
- if (buf == null)
- return 1;
- uint s1 = (uint) (adler & 0xffff);
- uint s2 = (uint) ((adler >> 16) & 0xffff);
- while (len > 0)
- {
- int k = len < NMAX ? len : NMAX;
- len -= k;
- while (k >= 16)
- {
-
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- s1 += buf[index++]; s2 += s1;
- k -= 16;
- }
- if (k != 0)
- {
- do
- {
- s1 += buf[index++];
- s2 += s1;
- }
- while (--k != 0);
- }
- s1 %= BASE;
- s2 %= BASE;
- }
- return (uint)((s2 << 16) | s1);
- }
- #pragma warning restore 3001
- #pragma warning restore 3002
- }
- }
|