From 07162fa301835387e4da4278326ec1ff45d1dc3e Mon Sep 17 00:00:00 2001 From: Aki Date: Wed, 29 Sep 2021 21:52:57 +0200 Subject: Squashed 'zlib/' content from commit cacf7f1 git-subtree-dir: zlib git-subtree-split: cacf7f1d4e3d44d871b605da3b647f07d718623f --- contrib/dotzlib/DotZLib/AssemblyInfo.cs | 58 ++++++ contrib/dotzlib/DotZLib/ChecksumImpl.cs | 202 ++++++++++++++++++++ contrib/dotzlib/DotZLib/CircularBuffer.cs | 83 ++++++++ contrib/dotzlib/DotZLib/CodecBase.cs | 198 ++++++++++++++++++++ contrib/dotzlib/DotZLib/Deflater.cs | 106 +++++++++++ contrib/dotzlib/DotZLib/DotZLib.cs | 288 ++++++++++++++++++++++++++++ contrib/dotzlib/DotZLib/DotZLib.csproj | 141 ++++++++++++++ contrib/dotzlib/DotZLib/GZipStream.cs | 301 ++++++++++++++++++++++++++++++ contrib/dotzlib/DotZLib/Inflater.cs | 105 +++++++++++ contrib/dotzlib/DotZLib/UnitTests.cs | 274 +++++++++++++++++++++++++++ 10 files changed, 1756 insertions(+) create mode 100644 contrib/dotzlib/DotZLib/AssemblyInfo.cs create mode 100644 contrib/dotzlib/DotZLib/ChecksumImpl.cs create mode 100644 contrib/dotzlib/DotZLib/CircularBuffer.cs create mode 100644 contrib/dotzlib/DotZLib/CodecBase.cs create mode 100644 contrib/dotzlib/DotZLib/Deflater.cs create mode 100644 contrib/dotzlib/DotZLib/DotZLib.cs create mode 100644 contrib/dotzlib/DotZLib/DotZLib.csproj create mode 100644 contrib/dotzlib/DotZLib/GZipStream.cs create mode 100644 contrib/dotzlib/DotZLib/Inflater.cs create mode 100644 contrib/dotzlib/DotZLib/UnitTests.cs (limited to 'contrib/dotzlib/DotZLib') diff --git a/contrib/dotzlib/DotZLib/AssemblyInfo.cs b/contrib/dotzlib/DotZLib/AssemblyInfo.cs new file mode 100644 index 0000000..0491bfc --- /dev/null +++ b/contrib/dotzlib/DotZLib/AssemblyInfo.cs @@ -0,0 +1,58 @@ +using System.Reflection; +using System.Runtime.CompilerServices; + +// +// General Information about an assembly is controlled through the following +// set of attributes. Change these attribute values to modify the information +// associated with an assembly. +// +[assembly: AssemblyTitle("DotZLib")] +[assembly: AssemblyDescription(".Net bindings for ZLib compression dll 1.2.x")] +[assembly: AssemblyConfiguration("")] +[assembly: AssemblyCompany("Henrik Ravn")] +[assembly: AssemblyProduct("")] +[assembly: AssemblyCopyright("(c) 2004 by Henrik Ravn")] +[assembly: AssemblyTrademark("")] +[assembly: AssemblyCulture("")] + +// +// Version information for an assembly consists of the following four values: +// +// Major Version +// Minor Version +// Build Number +// Revision +// +// You can specify all the values or you can default the Revision and Build Numbers +// by using the '*' as shown below: + +[assembly: AssemblyVersion("1.0.*")] + +// +// In order to sign your assembly you must specify a key to use. Refer to the +// Microsoft .NET Framework documentation for more information on assembly signing. +// +// Use the attributes below to control which key is used for signing. +// +// Notes: +// (*) If no key is specified, the assembly is not signed. +// (*) KeyName refers to a key that has been installed in the Crypto Service +// Provider (CSP) on your machine. KeyFile refers to a file which contains +// a key. +// (*) If the KeyFile and the KeyName values are both specified, the +// following processing occurs: +// (1) If the KeyName can be found in the CSP, that key is used. +// (2) If the KeyName does not exist and the KeyFile does exist, the key +// in the KeyFile is installed into the CSP and used. +// (*) In order to create a KeyFile, you can use the sn.exe (Strong Name) utility. +// When specifying the KeyFile, the location of the KeyFile should be +// relative to the project output directory which is +// %Project Directory%\obj\. For example, if your KeyFile is +// located in the project directory, you would specify the AssemblyKeyFile +// attribute as [assembly: AssemblyKeyFile("..\\..\\mykey.snk")] +// (*) Delay Signing is an advanced option - see the Microsoft .NET Framework +// documentation for more information on this. +// +[assembly: AssemblyDelaySign(false)] +[assembly: AssemblyKeyFile("")] +[assembly: AssemblyKeyName("")] diff --git a/contrib/dotzlib/DotZLib/ChecksumImpl.cs b/contrib/dotzlib/DotZLib/ChecksumImpl.cs new file mode 100644 index 0000000..788b2fc --- /dev/null +++ b/contrib/dotzlib/DotZLib/ChecksumImpl.cs @@ -0,0 +1,202 @@ +// +// © 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.Runtime.InteropServices; +using System.Text; + + +namespace DotZLib +{ + #region ChecksumGeneratorBase + /// + /// Implements the common functionality needed for all s + /// + /// + public abstract class ChecksumGeneratorBase : ChecksumGenerator + { + /// + /// The value of the current checksum + /// + protected uint _current; + + /// + /// Initializes a new instance of the checksum generator base - the current checksum is + /// set to zero + /// + public ChecksumGeneratorBase() + { + _current = 0; + } + + /// + /// Initializes a new instance of the checksum generator basewith a specified value + /// + /// The value to set the current checksum to + public ChecksumGeneratorBase(uint initialValue) + { + _current = initialValue; + } + + /// + /// Resets the current checksum to zero + /// + public void Reset() { _current = 0; } + + /// + /// Gets the current checksum value + /// + public uint Value { get { return _current; } } + + /// + /// Updates the current checksum with part of an array of bytes + /// + /// The data to update the checksum with + /// Where in data to start updating + /// The number of bytes from data to use + /// The sum of offset and count is larger than the length of data + /// data is a null reference + /// Offset or count is negative. + /// All the other Update methods are implmeneted in terms of this one. + /// This is therefore the only method a derived class has to implement + public abstract void Update(byte[] data, int offset, int count); + + /// + /// Updates the current checksum with an array of bytes. + /// + /// The data to update the checksum with + public void Update(byte[] data) + { + Update(data, 0, data.Length); + } + + /// + /// Updates the current checksum with the data from a string + /// + /// The string to update the checksum with + /// The characters in the string are converted by the UTF-8 encoding + public void Update(string data) + { + Update(Encoding.UTF8.GetBytes(data)); + } + + /// + /// Updates the current checksum with the data from a string, using a specific encoding + /// + /// The string to update the checksum with + /// The encoding to use + public void Update(string data, Encoding encoding) + { + Update(encoding.GetBytes(data)); + } + + } + #endregion + + #region CRC32 + /// + /// Implements a CRC32 checksum generator + /// + public sealed class CRC32Checksum : ChecksumGeneratorBase + { + #region DLL imports + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern uint crc32(uint crc, int data, uint length); + + #endregion + + /// + /// Initializes a new instance of the CRC32 checksum generator + /// + public CRC32Checksum() : base() {} + + /// + /// Initializes a new instance of the CRC32 checksum generator with a specified value + /// + /// The value to set the current checksum to + public CRC32Checksum(uint initialValue) : base(initialValue) {} + + /// + /// Updates the current checksum with part of an array of bytes + /// + /// The data to update the checksum with + /// Where in data to start updating + /// The number of bytes from data to use + /// The sum of offset and count is larger than the length of data + /// data is a null reference + /// Offset or count is negative. + public override void Update(byte[] data, int offset, int count) + { + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > data.Length) throw new ArgumentException(); + GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned); + try + { + _current = crc32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count); + } + finally + { + hData.Free(); + } + } + + } + #endregion + + #region Adler + /// + /// Implements a checksum generator that computes the Adler checksum on data + /// + public sealed class AdlerChecksum : ChecksumGeneratorBase + { + #region DLL imports + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern uint adler32(uint adler, int data, uint length); + + #endregion + + /// + /// Initializes a new instance of the Adler checksum generator + /// + public AdlerChecksum() : base() {} + + /// + /// Initializes a new instance of the Adler checksum generator with a specified value + /// + /// The value to set the current checksum to + public AdlerChecksum(uint initialValue) : base(initialValue) {} + + /// + /// Updates the current checksum with part of an array of bytes + /// + /// The data to update the checksum with + /// Where in data to start updating + /// The number of bytes from data to use + /// The sum of offset and count is larger than the length of data + /// data is a null reference + /// Offset or count is negative. + public override void Update(byte[] data, int offset, int count) + { + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > data.Length) throw new ArgumentException(); + GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned); + try + { + _current = adler32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count); + } + finally + { + hData.Free(); + } + } + + } + #endregion + +} \ No newline at end of file diff --git a/contrib/dotzlib/DotZLib/CircularBuffer.cs b/contrib/dotzlib/DotZLib/CircularBuffer.cs new file mode 100644 index 0000000..c1cab3a --- /dev/null +++ b/contrib/dotzlib/DotZLib/CircularBuffer.cs @@ -0,0 +1,83 @@ +// +// © 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.Diagnostics; + +namespace DotZLib +{ + + /// + /// This class implements a circular buffer + /// + internal class CircularBuffer + { + #region Private data + private int _capacity; + private int _head; + private int _tail; + private int _size; + private byte[] _buffer; + #endregion + + public CircularBuffer(int capacity) + { + Debug.Assert( capacity > 0 ); + _buffer = new byte[capacity]; + _capacity = capacity; + _head = 0; + _tail = 0; + _size = 0; + } + + public int Size { get { return _size; } } + + public int Put(byte[] source, int offset, int count) + { + Debug.Assert( count > 0 ); + int trueCount = Math.Min(count, _capacity - Size); + for (int i = 0; i < trueCount; ++i) + _buffer[(_tail+i) % _capacity] = source[offset+i]; + _tail += trueCount; + _tail %= _capacity; + _size += trueCount; + return trueCount; + } + + public bool Put(byte b) + { + if (Size == _capacity) // no room + return false; + _buffer[_tail++] = b; + _tail %= _capacity; + ++_size; + return true; + } + + public int Get(byte[] destination, int offset, int count) + { + int trueCount = Math.Min(count,Size); + for (int i = 0; i < trueCount; ++i) + destination[offset + i] = _buffer[(_head+i) % _capacity]; + _head += trueCount; + _head %= _capacity; + _size -= trueCount; + return trueCount; + } + + public int Get() + { + if (Size == 0) + return -1; + + int result = (int)_buffer[_head++ % _capacity]; + --_size; + return result; + } + + } +} diff --git a/contrib/dotzlib/DotZLib/CodecBase.cs b/contrib/dotzlib/DotZLib/CodecBase.cs new file mode 100644 index 0000000..42e6da3 --- /dev/null +++ b/contrib/dotzlib/DotZLib/CodecBase.cs @@ -0,0 +1,198 @@ +// +// © 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.Runtime.InteropServices; + +namespace DotZLib +{ + /// + /// Implements the common functionality needed for all s + /// + public abstract class CodecBase : Codec, IDisposable + { + + #region Data members + + /// + /// Instance of the internal zlib buffer structure that is + /// passed to all functions in the zlib dll + /// + internal ZStream _ztream = new ZStream(); + + /// + /// True if the object instance has been disposed, false otherwise + /// + protected bool _isDisposed = false; + + /// + /// The size of the internal buffers + /// + protected const int kBufferSize = 16384; + + private byte[] _outBuffer = new byte[kBufferSize]; + private byte[] _inBuffer = new byte[kBufferSize]; + + private GCHandle _hInput; + private GCHandle _hOutput; + + private uint _checksum = 0; + + #endregion + + /// + /// Initializes a new instance of the CodeBase class. + /// + public CodecBase() + { + try + { + _hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned); + _hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned); + } + catch (Exception) + { + CleanUp(false); + throw; + } + } + + + #region Codec Members + + /// + /// Occurs when more processed data are available. + /// + public event DataAvailableHandler DataAvailable; + + /// + /// Fires the event + /// + protected void OnDataAvailable() + { + if (_ztream.total_out > 0) + { + if (DataAvailable != null) + DataAvailable( _outBuffer, 0, (int)_ztream.total_out); + resetOutput(); + } + } + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// Adding data may, or may not, raise the DataAvailable event + public void Add(byte[] data) + { + Add(data,0,data.Length); + } + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// The index of the first byte to add from data + /// The number of bytes to add + /// Adding data may, or may not, raise the DataAvailable event + /// This must be implemented by a derived class + public abstract void Add(byte[] data, int offset, int count); + + /// + /// Finishes up any pending data that needs to be processed and handled. + /// + /// This must be implemented by a derived class + public abstract void Finish(); + + /// + /// Gets the checksum of the data that has been added so far + /// + public uint Checksum { get { return _checksum; } } + + #endregion + + #region Destructor & IDisposable stuff + + /// + /// Destroys this instance + /// + ~CodecBase() + { + CleanUp(false); + } + + /// + /// Releases any unmanaged resources and calls the method of the derived class + /// + public void Dispose() + { + CleanUp(true); + } + + /// + /// Performs any codec specific cleanup + /// + /// This must be implemented by a derived class + protected abstract void CleanUp(); + + // performs the release of the handles and calls the dereived CleanUp() + private void CleanUp(bool isDisposing) + { + if (!_isDisposed) + { + CleanUp(); + if (_hInput.IsAllocated) + _hInput.Free(); + if (_hOutput.IsAllocated) + _hOutput.Free(); + + _isDisposed = true; + } + } + + + #endregion + + #region Helper methods + + /// + /// Copies a number of bytes to the internal codec buffer - ready for proccesing + /// + /// The byte array that contains the data to copy + /// The index of the first byte to copy + /// The number of bytes to copy from data + protected void copyInput(byte[] data, int startIndex, int count) + { + Array.Copy(data, startIndex, _inBuffer,0, count); + _ztream.next_in = _hInput.AddrOfPinnedObject(); + _ztream.total_in = 0; + _ztream.avail_in = (uint)count; + + } + + /// + /// Resets the internal output buffers to a known state - ready for processing + /// + protected void resetOutput() + { + _ztream.total_out = 0; + _ztream.avail_out = kBufferSize; + _ztream.next_out = _hOutput.AddrOfPinnedObject(); + } + + /// + /// Updates the running checksum property + /// + /// The new checksum value + protected void setChecksum(uint newSum) + { + _checksum = newSum; + } + #endregion + + } +} diff --git a/contrib/dotzlib/DotZLib/Deflater.cs b/contrib/dotzlib/DotZLib/Deflater.cs new file mode 100644 index 0000000..c247792 --- /dev/null +++ b/contrib/dotzlib/DotZLib/Deflater.cs @@ -0,0 +1,106 @@ +// +// © 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.Diagnostics; +using System.Runtime.InteropServices; + +namespace DotZLib +{ + + /// + /// Implements a data compressor, using the deflate algorithm in the ZLib dll + /// + public sealed class Deflater : CodecBase + { + #region Dll imports + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)] + private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflate(ref ZStream sz, int flush); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflateReset(ref ZStream sz); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int deflateEnd(ref ZStream sz); + #endregion + + /// + /// Constructs an new instance of the Deflater + /// + /// The compression level to use for this Deflater + public Deflater(CompressLevel level) : base() + { + int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream)); + if (retval != 0) + throw new ZLibException(retval, "Could not initialize deflater"); + + resetOutput(); + } + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// The index of the first byte to add from data + /// The number of bytes to add + /// Adding data may, or may not, raise the DataAvailable event + public override void Add(byte[] data, int offset, int count) + { + if (data == null) throw new ArgumentNullException(); + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > data.Length) throw new ArgumentException(); + + int total = count; + int inputIndex = offset; + int err = 0; + + while (err >= 0 && inputIndex < total) + { + copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize)); + while (err >= 0 && _ztream.avail_in > 0) + { + err = deflate(ref _ztream, (int)FlushTypes.None); + if (err == 0) + while (_ztream.avail_out == 0) + { + OnDataAvailable(); + err = deflate(ref _ztream, (int)FlushTypes.None); + } + inputIndex += (int)_ztream.total_in; + } + } + setChecksum( _ztream.adler ); + } + + + /// + /// Finishes up any pending data that needs to be processed and handled. + /// + public override void Finish() + { + int err; + do + { + err = deflate(ref _ztream, (int)FlushTypes.Finish); + OnDataAvailable(); + } + while (err == 0); + setChecksum( _ztream.adler ); + deflateReset(ref _ztream); + resetOutput(); + } + + /// + /// Closes the internal zlib deflate stream + /// + protected override void CleanUp() { deflateEnd(ref _ztream); } + + } +} diff --git a/contrib/dotzlib/DotZLib/DotZLib.cs b/contrib/dotzlib/DotZLib/DotZLib.cs new file mode 100644 index 0000000..be184b4 --- /dev/null +++ b/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 + + /// + /// Defines constants for the various flush types used with zlib + /// + 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 + /// + /// Defines constants for the available compression levels in zlib + /// + public enum CompressLevel : int + { + /// + /// The default compression level with a reasonable compromise between compression and speed + /// + Default = -1, + /// + /// No compression at all. The data are passed straight through. + /// + None = 0, + /// + /// The maximum compression rate available. + /// + Best = 9, + /// + /// The fastest available compression level. + /// + Fastest = 1 + } + #endregion + + #region Exception classes + /// + /// The exception that is thrown when an error occurs on the zlib dll + /// + public class ZLibException : ApplicationException + { + /// + /// Initializes a new instance of the class with a specified + /// error message and error code + /// + /// The zlib error code that caused the exception + /// A message that (hopefully) describes the error + public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg)) + { + } + + /// + /// Initializes a new instance of the class with a specified + /// error code + /// + /// The zlib error code that caused the exception + public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode)) + { + } + } + #endregion + + #region Interfaces + + /// + /// Declares methods and properties that enables a running checksum to be calculated + /// + public interface ChecksumGenerator + { + /// + /// Gets the current value of the checksum + /// + uint Value { get; } + + /// + /// Clears the current checksum to 0 + /// + void Reset(); + + /// + /// Updates the current checksum with an array of bytes + /// + /// The data to update the checksum with + void Update(byte[] data); + + /// + /// Updates the current checksum with part of an array of bytes + /// + /// The data to update the checksum with + /// Where in data to start updating + /// The number of bytes from data to use + /// The sum of offset and count is larger than the length of data + /// data is a null reference + /// Offset or count is negative. + void Update(byte[] data, int offset, int count); + + /// + /// Updates the current checksum with the data from a string + /// + /// The string to update the checksum with + /// The characters in the string are converted by the UTF-8 encoding + void Update(string data); + + /// + /// Updates the current checksum with the data from a string, using a specific encoding + /// + /// The string to update the checksum with + /// The encoding to use + void Update(string data, Encoding encoding); + } + + + /// + /// Represents the method that will be called from a codec when new data + /// are available. + /// + /// The byte array containing the processed data + /// The index of the first processed byte in data + /// The number of processed bytes available + /// On return from this method, the data may be overwritten, so grab it while you can. + /// You cannot assume that startIndex will be zero. + /// + public delegate void DataAvailableHandler(byte[] data, int startIndex, int count); + + /// + /// Declares methods and events for implementing compressors/decompressors + /// + public interface Codec + { + /// + /// Occurs when more processed data are available. + /// + event DataAvailableHandler DataAvailable; + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// Adding data may, or may not, raise the DataAvailable event + void Add(byte[] data); + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// The index of the first byte to add from data + /// The number of bytes to add + /// Adding data may, or may not, raise the DataAvailable event + void Add(byte[] data, int offset, int count); + + /// + /// Finishes up any pending data that needs to be processed and handled. + /// + void Finish(); + + /// + /// Gets the checksum of the data that has been added so far + /// + uint Checksum { get; } + + + } + + #endregion + + #region Classes + /// + /// Encapsulates general information about the ZLib library + /// + 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 + + /// + /// Constructs an instance of the Info class. + /// + public Info() + { + _flags = zlibCompileFlags(); + } + + /// + /// True if the library is compiled with debug info + /// + public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } } + + /// + /// True if the library is compiled with assembly optimizations + /// + public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } } + + /// + /// Gets the size of the unsigned int that was compiled into Zlib + /// + public int SizeOfUInt { get { return bitSize(_flags & 3); } } + + /// + /// Gets the size of the unsigned long that was compiled into Zlib + /// + public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } } + + /// + /// Gets the size of the pointers that were compiled into Zlib + /// + public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } } + + /// + /// Gets the size of the z_off_t type that was compiled into Zlib + /// + public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } } + + /// + /// Gets the version of ZLib as a string, e.g. "1.2.1" + /// + public static string Version { get { return zlibVersion(); } } + } + + #endregion + +} diff --git a/contrib/dotzlib/DotZLib/DotZLib.csproj b/contrib/dotzlib/DotZLib/DotZLib.csproj new file mode 100644 index 0000000..71eeb85 --- /dev/null +++ b/contrib/dotzlib/DotZLib/DotZLib.csproj @@ -0,0 +1,141 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/contrib/dotzlib/DotZLib/GZipStream.cs b/contrib/dotzlib/DotZLib/GZipStream.cs new file mode 100644 index 0000000..b161300 --- /dev/null +++ b/contrib/dotzlib/DotZLib/GZipStream.cs @@ -0,0 +1,301 @@ +// +// © 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; + +namespace DotZLib +{ + /// + /// Implements a compressed , in GZip (.gz) format. + /// + public class GZipStream : Stream, IDisposable + { + #region Dll Imports + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)] + private static extern IntPtr gzopen(string name, string mode); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int gzclose(IntPtr gzFile); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int gzwrite(IntPtr gzFile, int data, int length); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int gzread(IntPtr gzFile, int data, int length); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int gzgetc(IntPtr gzFile); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int gzputc(IntPtr gzFile, int c); + + #endregion + + #region Private data + private IntPtr _gzFile; + private bool _isDisposed = false; + private bool _isWriting; + #endregion + + #region Constructors + /// + /// Creates a new file as a writeable GZipStream + /// + /// The name of the compressed file to create + /// The compression level to use when adding data + /// If an error occurred in the internal zlib function + public GZipStream(string fileName, CompressLevel level) + { + _isWriting = true; + _gzFile = gzopen(fileName, String.Format("wb{0}", (int)level)); + if (_gzFile == IntPtr.Zero) + throw new ZLibException(-1, "Could not open " + fileName); + } + + /// + /// Opens an existing file as a readable GZipStream + /// + /// The name of the file to open + /// If an error occurred in the internal zlib function + public GZipStream(string fileName) + { + _isWriting = false; + _gzFile = gzopen(fileName, "rb"); + if (_gzFile == IntPtr.Zero) + throw new ZLibException(-1, "Could not open " + fileName); + + } + #endregion + + #region Access properties + /// + /// Returns true of this stream can be read from, false otherwise + /// + public override bool CanRead + { + get + { + return !_isWriting; + } + } + + + /// + /// Returns false. + /// + public override bool CanSeek + { + get + { + return false; + } + } + + /// + /// Returns true if this tsream is writeable, false otherwise + /// + public override bool CanWrite + { + get + { + return _isWriting; + } + } + #endregion + + #region Destructor & IDispose stuff + + /// + /// Destroys this instance + /// + ~GZipStream() + { + cleanUp(false); + } + + /// + /// Closes the external file handle + /// + public void Dispose() + { + cleanUp(true); + } + + // Does the actual closing of the file handle. + private void cleanUp(bool isDisposing) + { + if (!_isDisposed) + { + gzclose(_gzFile); + _isDisposed = true; + } + } + #endregion + + #region Basic reading and writing + /// + /// Attempts to read a number of bytes from the stream. + /// + /// The destination data buffer + /// The index of the first destination byte in buffer + /// The number of bytes requested + /// The number of bytes read + /// If buffer is null + /// If count or offset are negative + /// If offset + count is > buffer.Length + /// If this stream is not readable. + /// If this stream has been disposed. + public override int Read(byte[] buffer, int offset, int count) + { + if (!CanRead) throw new NotSupportedException(); + if (buffer == null) throw new ArgumentNullException(); + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > buffer.Length) throw new ArgumentException(); + if (_isDisposed) throw new ObjectDisposedException("GZipStream"); + + GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned); + int result; + try + { + result = gzread(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count); + if (result < 0) + throw new IOException(); + } + finally + { + h.Free(); + } + return result; + } + + /// + /// Attempts to read a single byte from the stream. + /// + /// The byte that was read, or -1 in case of error or End-Of-File + public override int ReadByte() + { + if (!CanRead) throw new NotSupportedException(); + if (_isDisposed) throw new ObjectDisposedException("GZipStream"); + return gzgetc(_gzFile); + } + + /// + /// Writes a number of bytes to the stream + /// + /// + /// + /// + /// If buffer is null + /// If count or offset are negative + /// If offset + count is > buffer.Length + /// If this stream is not writeable. + /// If this stream has been disposed. + public override void Write(byte[] buffer, int offset, int count) + { + if (!CanWrite) throw new NotSupportedException(); + if (buffer == null) throw new ArgumentNullException(); + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > buffer.Length) throw new ArgumentException(); + if (_isDisposed) throw new ObjectDisposedException("GZipStream"); + + GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned); + try + { + int result = gzwrite(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count); + if (result < 0) + throw new IOException(); + } + finally + { + h.Free(); + } + } + + /// + /// Writes a single byte to the stream + /// + /// The byte to add to the stream. + /// If this stream is not writeable. + /// If this stream has been disposed. + public override void WriteByte(byte value) + { + if (!CanWrite) throw new NotSupportedException(); + if (_isDisposed) throw new ObjectDisposedException("GZipStream"); + + int result = gzputc(_gzFile, (int)value); + if (result < 0) + throw new IOException(); + } + #endregion + + #region Position & length stuff + /// + /// Not supported. + /// + /// + /// Always thrown + public override void SetLength(long value) + { + throw new NotSupportedException(); + } + + /// + /// Not suppported. + /// + /// + /// + /// + /// Always thrown + public override long Seek(long offset, SeekOrigin origin) + { + throw new NotSupportedException(); + } + + /// + /// Flushes the GZipStream. + /// + /// In this implementation, this method does nothing. This is because excessive + /// flushing may degrade the achievable compression rates. + public override void Flush() + { + // left empty on purpose + } + + /// + /// Gets/sets the current position in the GZipStream. Not suppported. + /// + /// In this implementation this property is not supported + /// Always thrown + public override long Position + { + get + { + throw new NotSupportedException(); + } + set + { + throw new NotSupportedException(); + } + } + + /// + /// Gets the size of the stream. Not suppported. + /// + /// In this implementation this property is not supported + /// Always thrown + public override long Length + { + get + { + throw new NotSupportedException(); + } + } + #endregion + } +} diff --git a/contrib/dotzlib/DotZLib/Inflater.cs b/contrib/dotzlib/DotZLib/Inflater.cs new file mode 100644 index 0000000..8ed5451 --- /dev/null +++ b/contrib/dotzlib/DotZLib/Inflater.cs @@ -0,0 +1,105 @@ +// +// © 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.Diagnostics; +using System.Runtime.InteropServices; + +namespace DotZLib +{ + + /// + /// Implements a data decompressor, using the inflate algorithm in the ZLib dll + /// + public class Inflater : CodecBase + { + #region Dll imports + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)] + private static extern int inflateInit_(ref ZStream sz, string vs, int size); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int inflate(ref ZStream sz, int flush); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int inflateReset(ref ZStream sz); + + [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)] + private static extern int inflateEnd(ref ZStream sz); + #endregion + + /// + /// Constructs an new instance of the Inflater + /// + public Inflater() : base() + { + int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream)); + if (retval != 0) + throw new ZLibException(retval, "Could not initialize inflater"); + + resetOutput(); + } + + + /// + /// Adds more data to the codec to be processed. + /// + /// Byte array containing the data to be added to the codec + /// The index of the first byte to add from data + /// The number of bytes to add + /// Adding data may, or may not, raise the DataAvailable event + public override void Add(byte[] data, int offset, int count) + { + if (data == null) throw new ArgumentNullException(); + if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException(); + if ((offset+count) > data.Length) throw new ArgumentException(); + + int total = count; + int inputIndex = offset; + int err = 0; + + while (err >= 0 && inputIndex < total) + { + copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize)); + err = inflate(ref _ztream, (int)FlushTypes.None); + if (err == 0) + while (_ztream.avail_out == 0) + { + OnDataAvailable(); + err = inflate(ref _ztream, (int)FlushTypes.None); + } + + inputIndex += (int)_ztream.total_in; + } + setChecksum( _ztream.adler ); + } + + + /// + /// Finishes up any pending data that needs to be processed and handled. + /// + public override void Finish() + { + int err; + do + { + err = inflate(ref _ztream, (int)FlushTypes.Finish); + OnDataAvailable(); + } + while (err == 0); + setChecksum( _ztream.adler ); + inflateReset(ref _ztream); + resetOutput(); + } + + /// + /// Closes the internal zlib inflate stream + /// + protected override void CleanUp() { inflateEnd(ref _ztream); } + + + } +} diff --git a/contrib/dotzlib/DotZLib/UnitTests.cs b/contrib/dotzlib/DotZLib/UnitTests.cs new file mode 100644 index 0000000..44f7633 --- /dev/null +++ b/contrib/dotzlib/DotZLib/UnitTests.cs @@ -0,0 +1,274 @@ +// +// © 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.Collections; +using System.IO; + +// uncomment the define below to include unit tests +//#define nunit +#if nunit +using NUnit.Framework; + +// Unit tests for the DotZLib class library +// ---------------------------------------- +// +// Use this with NUnit 2 from http://www.nunit.org +// + +namespace DotZLibTests +{ + using DotZLib; + + // helper methods + internal class Utils + { + public static bool byteArrEqual( byte[] lhs, byte[] rhs ) + { + if (lhs.Length != rhs.Length) + return false; + for (int i = lhs.Length-1; i >= 0; --i) + if (lhs[i] != rhs[i]) + return false; + return true; + } + + } + + + [TestFixture] + public class CircBufferTests + { + #region Circular buffer tests + [Test] + public void SinglePutGet() + { + CircularBuffer buf = new CircularBuffer(10); + Assert.AreEqual( 0, buf.Size ); + Assert.AreEqual( -1, buf.Get() ); + + Assert.IsTrue(buf.Put( 1 )); + Assert.AreEqual( 1, buf.Size ); + Assert.AreEqual( 1, buf.Get() ); + Assert.AreEqual( 0, buf.Size ); + Assert.AreEqual( -1, buf.Get() ); + } + + [Test] + public void BlockPutGet() + { + CircularBuffer buf = new CircularBuffer(10); + byte[] arr = {1,2,3,4,5,6,7,8,9,10}; + Assert.AreEqual( 10, buf.Put(arr,0,10) ); + Assert.AreEqual( 10, buf.Size ); + Assert.IsFalse( buf.Put(11) ); + Assert.AreEqual( 1, buf.Get() ); + Assert.IsTrue( buf.Put(11) ); + + byte[] arr2 = (byte[])arr.Clone(); + Assert.AreEqual( 9, buf.Get(arr2,1,9) ); + Assert.IsTrue( Utils.byteArrEqual(arr,arr2) ); + } + + #endregion + } + + [TestFixture] + public class ChecksumTests + { + #region CRC32 Tests + [Test] + public void CRC32_Null() + { + CRC32Checksum crc32 = new CRC32Checksum(); + Assert.AreEqual( 0, crc32.Value ); + + crc32 = new CRC32Checksum(1); + Assert.AreEqual( 1, crc32.Value ); + + crc32 = new CRC32Checksum(556); + Assert.AreEqual( 556, crc32.Value ); + } + + [Test] + public void CRC32_Data() + { + CRC32Checksum crc32 = new CRC32Checksum(); + byte[] data = { 1,2,3,4,5,6,7 }; + crc32.Update(data); + Assert.AreEqual( 0x70e46888, crc32.Value ); + + crc32 = new CRC32Checksum(); + crc32.Update("penguin"); + Assert.AreEqual( 0x0e5c1a120, crc32.Value ); + + crc32 = new CRC32Checksum(1); + crc32.Update("penguin"); + Assert.AreEqual(0x43b6aa94, crc32.Value); + + } + #endregion + + #region Adler tests + + [Test] + public void Adler_Null() + { + AdlerChecksum adler = new AdlerChecksum(); + Assert.AreEqual(0, adler.Value); + + adler = new AdlerChecksum(1); + Assert.AreEqual( 1, adler.Value ); + + adler = new AdlerChecksum(556); + Assert.AreEqual( 556, adler.Value ); + } + + [Test] + public void Adler_Data() + { + AdlerChecksum adler = new AdlerChecksum(1); + byte[] data = { 1,2,3,4,5,6,7 }; + adler.Update(data); + Assert.AreEqual( 0x5b001d, adler.Value ); + + adler = new AdlerChecksum(); + adler.Update("penguin"); + Assert.AreEqual(0x0bcf02f6, adler.Value ); + + adler = new AdlerChecksum(1); + adler.Update("penguin"); + Assert.AreEqual(0x0bd602f7, adler.Value); + + } + #endregion + } + + [TestFixture] + public class InfoTests + { + #region Info tests + [Test] + public void Info_Version() + { + Info info = new Info(); + Assert.AreEqual("1.2.11", Info.Version); + Assert.AreEqual(32, info.SizeOfUInt); + Assert.AreEqual(32, info.SizeOfULong); + Assert.AreEqual(32, info.SizeOfPointer); + Assert.AreEqual(32, info.SizeOfOffset); + } + #endregion + } + + [TestFixture] + public class DeflateInflateTests + { + #region Deflate tests + [Test] + public void Deflate_Init() + { + using (Deflater def = new Deflater(CompressLevel.Default)) + { + } + } + + private ArrayList compressedData = new ArrayList(); + private uint adler1; + + private ArrayList uncompressedData = new ArrayList(); + private uint adler2; + + public void CDataAvail(byte[] data, int startIndex, int count) + { + for (int i = 0; i < count; ++i) + compressedData.Add(data[i+startIndex]); + } + + [Test] + public void Deflate_Compress() + { + compressedData.Clear(); + + byte[] testData = new byte[35000]; + for (int i = 0; i < testData.Length; ++i) + testData[i] = 5; + + using (Deflater def = new Deflater((CompressLevel)5)) + { + def.DataAvailable += new DataAvailableHandler(CDataAvail); + def.Add(testData); + def.Finish(); + adler1 = def.Checksum; + } + } + #endregion + + #region Inflate tests + [Test] + public void Inflate_Init() + { + using (Inflater inf = new Inflater()) + { + } + } + + private void DDataAvail(byte[] data, int startIndex, int count) + { + for (int i = 0; i < count; ++i) + uncompressedData.Add(data[i+startIndex]); + } + + [Test] + public void Inflate_Expand() + { + uncompressedData.Clear(); + + using (Inflater inf = new Inflater()) + { + inf.DataAvailable += new DataAvailableHandler(DDataAvail); + inf.Add((byte[])compressedData.ToArray(typeof(byte))); + inf.Finish(); + adler2 = inf.Checksum; + } + Assert.AreEqual( adler1, adler2 ); + } + #endregion + } + + [TestFixture] + public class GZipStreamTests + { + #region GZipStream test + [Test] + public void GZipStream_WriteRead() + { + using (GZipStream gzOut = new GZipStream("gzstream.gz", CompressLevel.Best)) + { + BinaryWriter writer = new BinaryWriter(gzOut); + writer.Write("hi there"); + writer.Write(Math.PI); + writer.Write(42); + } + + using (GZipStream gzIn = new GZipStream("gzstream.gz")) + { + BinaryReader reader = new BinaryReader(gzIn); + string s = reader.ReadString(); + Assert.AreEqual("hi there",s); + double d = reader.ReadDouble(); + Assert.AreEqual(Math.PI, d); + int i = reader.ReadInt32(); + Assert.AreEqual(42,i); + } + + } + #endregion + } +} + +#endif -- cgit v1.1