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Diffstat (limited to 'Build/source/libs/zlib/zlib-1.2.4/contrib/dotzlib/DotZLib/DotZLib.cs')
-rw-r--r-- | Build/source/libs/zlib/zlib-1.2.4/contrib/dotzlib/DotZLib/DotZLib.cs | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/Build/source/libs/zlib/zlib-1.2.4/contrib/dotzlib/DotZLib/DotZLib.cs b/Build/source/libs/zlib/zlib-1.2.4/contrib/dotzlib/DotZLib/DotZLib.cs new file mode 100644 index 00000000000..90c7c3b3807 --- /dev/null +++ b/Build/source/libs/zlib/zlib-1.2.4/contrib/dotzlib/DotZLib/DotZLib.cs @@ -0,0 +1,288 @@ +// +// © Copyright Henrik Ravn 2004 +// +// Use, modification and distribution are subject to the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +using System; +using System.IO; +using System.Runtime.InteropServices; +using System.Text; + + +namespace DotZLib +{ + + #region Internal types + + /// <summary> + /// Defines constants for the various flush types used with zlib + /// </summary> + internal enum FlushTypes + { + None, Partial, Sync, Full, Finish, Block + } + + #region ZStream structure + // internal mapping of the zlib zstream structure for marshalling + [StructLayoutAttribute(LayoutKind.Sequential, Pack=4, Size=0, CharSet=CharSet.Ansi)] + internal struct ZStream + { + public IntPtr next_in; + public uint avail_in; + public uint total_in; + + public IntPtr next_out; + public uint avail_out; + public uint total_out; + + [MarshalAs(UnmanagedType.LPStr)] + string msg; + uint state; + + uint zalloc; + uint zfree; + uint opaque; + + int data_type; + public uint adler; + uint reserved; + } + + #endregion + + #endregion + + #region Public enums + /// <summary> + /// Defines constants for the available compression levels in zlib + /// </summary> + public enum CompressLevel : int + { + /// <summary> + /// The default compression level with a reasonable compromise between compression and speed + /// </summary> + Default = -1, + /// <summary> + /// No compression at all. The data are passed straight through. + /// </summary> + None = 0, + /// <summary> + /// The maximum compression rate available. + /// </summary> + Best = 9, + /// <summary> + /// The fastest available compression level. + /// </summary> + Fastest = 1 + } + #endregion + + #region Exception classes + /// <summary> + /// The exception that is thrown when an error occurs on the zlib dll + /// </summary> + public class ZLibException : ApplicationException + { + /// <summary> + /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified + /// error message and error code + /// </summary> + /// <param name="errorCode">The zlib error code that caused the exception</param> + /// <param name="msg">A message that (hopefully) describes the error</param> + public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg)) + { + } + + /// <summary> + /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified + /// error code + /// </summary> + /// <param name="errorCode">The zlib error code that caused the exception</param> + public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode)) + { + } + } + #endregion + + #region Interfaces + + /// <summary> + /// Declares methods and properties that enables a running checksum to be calculated + /// </summary> + public interface ChecksumGenerator + { + /// <summary> + /// Gets the current value of the checksum + /// </summary> + uint Value { get; } + + /// <summary> + /// Clears the current checksum to 0 + /// </summary> + void Reset(); + + /// <summary> + /// Updates the current checksum with an array of bytes + /// </summary> + /// <param name="data">The data to update the checksum with</param> + void Update(byte[] data); + + /// <summary> + /// Updates the current checksum with part of an array of bytes + /// </summary> + /// <param name="data">The data to update the checksum with</param> + /// <param name="offset">Where in <c>data</c> to start updating</param> + /// <param name="count">The number of bytes from <c>data</c> to use</param> + /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception> + /// <exception cref="ArgumentNullException"><c>data</c> is a null reference</exception> + /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception> + void Update(byte[] data, int offset, int count); + + /// <summary> + /// Updates the current checksum with the data from a string + /// </summary> + /// <param name="data">The string to update the checksum with</param> + /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks> + void Update(string data); + + /// <summary> + /// Updates the current checksum with the data from a string, using a specific encoding + /// </summary> + /// <param name="data">The string to update the checksum with</param> + /// <param name="encoding">The encoding to use</param> + void Update(string data, Encoding encoding); + } + + + /// <summary> + /// Represents the method that will be called from a codec when new data + /// are available. + /// </summary> + /// <paramref name="data">The byte array containing the processed data</paramref> + /// <paramref name="startIndex">The index of the first processed byte in <c>data</c></paramref> + /// <paramref name="count">The number of processed bytes available</paramref> + /// <remarks>On return from this method, the data may be overwritten, so grab it while you can. + /// You cannot assume that startIndex will be zero. + /// </remarks> + public delegate void DataAvailableHandler(byte[] data, int startIndex, int count); + + /// <summary> + /// Declares methods and events for implementing compressors/decompressors + /// </summary> + public interface Codec + { + /// <summary> + /// Occurs when more processed data are available. + /// </summary> + event DataAvailableHandler DataAvailable; + + /// <summary> + /// Adds more data to the codec to be processed. + /// </summary> + /// <param name="data">Byte array containing the data to be added to the codec</param> + /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks> + void Add(byte[] data); + + /// <summary> + /// Adds more data to the codec to be processed. + /// </summary> + /// <param name="data">Byte array containing the data to be added to the codec</param> + /// <param name="offset">The index of the first byte to add from <c>data</c></param> + /// <param name="count">The number of bytes to add</param> + /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks> + void Add(byte[] data, int offset, int count); + + /// <summary> + /// Finishes up any pending data that needs to be processed and handled. + /// </summary> + void Finish(); + + /// <summary> + /// Gets the checksum of the data that has been added so far + /// </summary> + uint Checksum { get; } + + + } + + #endregion + + #region Classes + /// <summary> + /// Encapsulates general information about the ZLib library + /// </summary> + public class Info + { + #region DLL imports + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern uint zlibCompileFlags(); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern string zlibVersion(); + #endregion + + #region Private stuff + private uint _flags; + + // helper function that unpacks a bitsize mask + private static int bitSize(uint bits) + { + switch (bits) + { + case 0: return 16; + case 1: return 32; + case 2: return 64; + } + return -1; + } + #endregion + + /// <summary> + /// Constructs an instance of the <c>Info</c> class. + /// </summary> + public Info() + { + _flags = zlibCompileFlags(); + } + + /// <summary> + /// True if the library is compiled with debug info + /// </summary> + public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } } + + /// <summary> + /// True if the library is compiled with assembly optimizations + /// </summary> + public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } } + + /// <summary> + /// Gets the size of the unsigned int that was compiled into Zlib + /// </summary> + public int SizeOfUInt { get { return bitSize(_flags & 3); } } + + /// <summary> + /// Gets the size of the unsigned long that was compiled into Zlib + /// </summary> + public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } } + + /// <summary> + /// Gets the size of the pointers that were compiled into Zlib + /// </summary> + public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } } + + /// <summary> + /// Gets the size of the z_off_t type that was compiled into Zlib + /// </summary> + public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } } + + /// <summary> + /// Gets the version of ZLib as a string, e.g. "1.2.1" + /// </summary> + public static string Version { get { return zlibVersion(); } } + } + + #endregion + +} |