zlib 1.2.2.1

ChangeLog

@@ -1,6 +1,35 @@
 
                 ChangeLog file for zlib
 
+Changes in 1.2.2.1 (31 October 2004)
+- Allow inflateSetDictionary() call for raw inflate
+- Fix inflate header crc check bug for file names and comments
+- Add deflateSetHeader() and gz_header structure for custom gzip headers
+- Add inflateGetheader() to retrieve gzip headers
+- Add crc32_combine() and adler32_combine() functions
+- Add alloc_func, free_func, in_func, out_func to Z_PREFIX list
+- Use zstreamp consistently in zlib.h (inflate_back functions)
+- Remove GUNZIP condition from definition of inflate_mode in inflate.h
+  and in contrib/inflate86/inffast.S [Truta, Anderson]
+- Add support for AMD64 in contrib/inflate86/inffas86.c [Anderson]
+- Update projects/README.projects and projects/visualc6 [Truta]
+- Update win32/DLL_FAQ.txt [Truta]
+- Avoid warning under NO_GZCOMPRESS in gzio.c; fix typo [Truta]
+- Deprecate Z_ASCII; use Z_TEXT instead [Truta]
+- Use a new algorithm for setting strm->data_type in trees.c [Truta]
+- Do not define an exit() prototype in zutil.c unless DEBUG defined
+- Remove prototype of exit() from zutil.c, example.c, minigzip.c [Truta]
+- Add comment in zlib.h for Z_NO_FLUSH parameter to deflate()
+
+Changes in 1.2.2 (3 October 2004)
+- Update zlib.h comments on gzip in-memory processing
+- Set adler to 1 in inflateReset() to support Java test suite [Walles]
+- Add contrib/dotzlib [Ravn]
+- Update win32/DLL_FAQ.txt [Truta]
+- Update contrib/minizip [Vollant]
+- Move contrib/visual-basic.txt to old/ [Truta]
+- Fix assembler builds in projects/visualc6/ [Truta]
+
 Changes in 1.2.1.2 (9 September 2004)
 - Update INDEX file
 - Fix trees.c to update strm->data_type (no one ever noticed!)

Makefile

@@ -30,7 +30,7 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.1.2
+SHAREDLIBV=libz.so.1.2.2.1
 SHAREDLIBM=libz.so.1
 
 AR=ar rc

Makefile.in

@@ -30,7 +30,7 @@ CPP=$(CC) -E
 
 LIBS=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.1.2
+SHAREDLIBV=libz.so.1.2.2.1
 SHAREDLIBM=libz.so.1
 
 AR=ar rc

README

@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY
 
-zlib 1.2.1.2 is a general purpose data compression library.  All the code is
+zlib 1.2.2.1 is a general purpose data compression library.  All the code is
 thread safe.  The data format used by the zlib library is described by RFCs
 (Request for Comments) 1950 to 1952 in the files
 http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
@@ -34,7 +34,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
 issue of  Dr. Dobb's Journal; a copy of the article is available in
 http://dogma.net/markn/articles/zlibtool/zlibtool.htm
 
-The changes made in version 1.2.1.2 are documented in the file ChangeLog.
+The changes made in version 1.2.2.1 are documented in the file ChangeLog.
 
 Unsupported third party contributions are provided in directory "contrib".
 

adler32.c

@@ -1,5 +1,5 @@
 /* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -72,3 +72,25 @@ uLong ZEXPORT adler32(adler, buf, len)
     }
     return (s2 << 16) | s1;
 }
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    uLong len2;
+{
+    unsigned long s1;
+    unsigned long s2;
+
+    len2 %= BASE;
+    s1 = adler1 & 0xffff;
+    s2 = len2 * s1;
+    MOD(s2);
+    s1 += (adler2 & 0xffff) + BASE - 1;
+    s2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - len2;
+    if (s1 > BASE) s1 -= BASE;
+    if (s1 > BASE) s1 -= BASE;
+    if (s2 > (BASE << 1)) s2 -= (BASE << 1);
+    if (s2 > BASE) s2 -= BASE;
+    return (s2 << 16) | s1;
+}

as400/compile.clp

@@ -118,6 +118,6 @@
                                  &MODLIB/INFTREES    &MODLIB/TREES       +
                                  &MODLIB/UNCOMPR     &MODLIB/ZUTIL)      +
                           SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC) +
-                          TEXT('ZLIB 1.2.1') TGTRLS(V4R4M0)
+                          TEXT('ZLIB 1.2.2') TGTRLS(V4R4M0)
 
              ENDPGM

as400/readme.txt

@@ -1,4 +1,4 @@
-        ZLIB version 1.2.1 for AS400 installation instructions
+        ZLIB version 1.2.2 for AS400 installation instructions
 
 I) From an AS400 *SAVF file:
 

as400/zlib.inc

@@ -1,7 +1,7 @@
       *  ZLIB.INC - Interface to the general purpose compression library
       *
       *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-      *  Version 1.2.1.2
+      *  Version 1.2.2.1
       *
       *
       *  WARNING:
@@ -20,8 +20,8 @@
       *                               Constants
       **************************************************************************
       *
-     D ZLIB_VERSION    C                   '1.2.1.2'                            Header's version
+     D ZLIB_VERSION    C                   '1.2.2.1'                            Header's version
-     D ZLIB_VERNUM     C                   X'1212'
+     D ZLIB_VERNUM     C                   X'1221'
       *
      D Z_NO_FLUSH      C                   0
      D Z_SYNC_FLUSH    C                   2

compress.c

@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 

contrib/README.contrib

@@ -19,6 +19,9 @@ blast/      by Mark Adler <madler@alumni.caltech.edu>
 delphi/     by Cosmin Truta <cosmint@cs.ubbcluj.ro>
         Support for Delphi and C++ Builder
 
+dotzlib/    by Henrik Ravn <henrik@ravn.com>
+        Support for Microsoft .Net and Visual C++ .Net
+
 gzappend/   by Mark Adler <madler@alumni.caltech.edu>
         append to a gzip file -- illustrates the use of Z_BLOCK
 
@@ -60,11 +63,8 @@ puff/       by Mark Adler <madler@alumni.caltech.edu>
 testzlib/   by Gilles Vollant <info@winimage.com>
         Example of the use of zlib
 
-untgz/      by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+untgz/      by Pedro A. Aranda Gutierrez <paag@tid.es>
         A very simple tar.gz file extractor using zlib
 
-visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
-        How to use compress(), uncompress() and the gz* functions from VB
-
 vstudio/    by Gilles Vollant <info@winimage.com>
-        Building a minizip-enhanced zlib with Visual Studio .NET
+        Building a minizip-enhanced zlib with Microsoft Visual Studio

contrib/ada/zlib.gpr

@@ -18,4 +18,3 @@ project Zlib is
    end Builder;
 
 end Zlib;
-

contrib/dotzlib/DotZLib.build

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<project name="DotZLib" default="build" basedir="./DotZLib">
+	<description>A .Net wrapper library around ZLib1.dll</description>
+
+	<property name="nunit.location" value="c:/program files/NUnit V2.1/bin" />
+	<property name="build.root" value="bin" />
+	
+	<property name="debug" value="true" />
+	<property name="nunit" value="true" />
+
+	<property name="build.folder" value="${build.root}/debug/" if="${debug}" />
+	<property name="build.folder" value="${build.root}/release/" unless="${debug}" />
+
+	<target name="clean" description="Remove all generated files">
+		<delete dir="${build.root}" failonerror="false" />
+	</target>
+
+	<target name="build" description="compiles the source code">
+		
+		<mkdir dir="${build.folder}" />
+		<csc target="library" output="${build.folder}DotZLib.dll" debug="${debug}">
+			<references basedir="${nunit.location}">
+				<includes if="${nunit}" name="nunit.framework.dll" />
+			</references>
+			<sources>
+				<includes name="*.cs" />
+				<excludes name="UnitTests.cs" unless="${nunit}" />
+			</sources>
+			<arg value="/d:nunit" if="${nunit}" />
+		</csc>
+	</target>
+
+</project>

contrib/dotzlib/DotZLib.sln

@@ -0,0 +1,21 @@
+Microsoft Visual Studio Solution File, Format Version 8.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DotZLib", "DotZLib\DotZLib.csproj", "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
+	ProjectSection(ProjectDependencies) = postProject
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfiguration) = preSolution
+		Debug = Debug
+		Release = Release
+	EndGlobalSection
+	GlobalSection(ProjectConfiguration) = postSolution
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.ActiveCfg = Debug|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Debug.Build.0 = Debug|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.ActiveCfg = Release|.NET
+		{BB1EE0B1-1808-46CB-B786-949D91117FC5}.Release.Build.0 = Release|.NET
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+	EndGlobalSection
+	GlobalSection(ExtensibilityAddIns) = postSolution
+	EndGlobalSection
+EndGlobal

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\<configuration>. 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("")]

contrib/dotzlib/DotZLib/ChecksumImpl.cs

@@ -0,0 +1,202 @@
+//
+// <20> 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
+    /// <summary>
+    /// Implements the common functionality needed for all <see cref="ChecksumGenerator"/>s
+    /// </summary>
+    /// <example></example>
+    public abstract class ChecksumGeneratorBase : ChecksumGenerator
+    {
+        /// <summary>
+        /// The value of the current checksum
+        /// </summary>
+        protected uint _current;
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator base - the current checksum is 
+        /// set to zero
+        /// </summary>
+        public ChecksumGeneratorBase()
+        {
+            _current = 0;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator basewith a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public ChecksumGeneratorBase(uint initialValue)
+        {
+            _current = initialValue;
+        }
+
+        /// <summary>
+        /// Resets the current checksum to zero
+        /// </summary>
+        public void Reset() { _current = 0; }
+
+        /// <summary>
+        /// Gets the current checksum value
+        /// </summary>
+        public uint Value { get { return _current; } }
+
+        /// <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="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        /// <remarks>All the other <c>Update</c> methods are implmeneted in terms of this one. 
+        /// This is therefore the only method a derived class has to implement</remarks>
+        public abstract void Update(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Updates the current checksum with an array of bytes.
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        public void Update(byte[] data)
+        {
+            Update(data, 0, data.Length);
+        }
+
+        /// <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>
+        public void Update(string data)
+        {
+			Update(Encoding.UTF8.GetBytes(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>
+        public void Update(string data, Encoding encoding)
+        {
+            Update(encoding.GetBytes(data));
+        }
+
+    }
+    #endregion
+
+    #region CRC32
+    /// <summary>
+    /// Implements a CRC32 checksum generator
+    /// </summary>
+    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
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator
+        /// </summary>
+        public CRC32Checksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public CRC32Checksum(uint initialValue) : base(initialValue) {}
+
+        /// <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="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        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
+    /// <summary>
+    /// Implements a checksum generator that computes the Adler checksum on data
+    /// </summary>
+    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
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator
+        /// </summary>
+        public AdlerChecksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public AdlerChecksum(uint initialValue) : base(initialValue) {}
+
+        /// <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="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        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
+
+}

contrib/dotzlib/DotZLib/CircularBuffer.cs

@@ -0,0 +1,83 @@
+//
+// <20> 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
+{
+
+	/// <summary>
+	/// This class implements a circular buffer
+	/// </summary>
+	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;
+        }
+
+    }
+}

contrib/dotzlib/DotZLib/CodecBase.cs

@@ -0,0 +1,198 @@
+//
+// <20> 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
+{
+	/// <summary>
+	/// Implements the common functionality needed for all <see cref="Codec"/>s
+	/// </summary>
+	public abstract class CodecBase : Codec, IDisposable
+	{
+
+        #region Data members
+
+        /// <summary>
+        /// Instance of the internal zlib buffer structure that is 
+        /// passed to all functions in the zlib dll
+        /// </summary>
+        internal ZStream _ztream = new ZStream();
+
+        /// <summary>
+        /// True if the object instance has been disposed, false otherwise
+        /// </summary>
+        protected bool _isDisposed = false;
+
+        /// <summary>
+        /// The size of the internal buffers
+        /// </summary>
+        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
+
+        /// <summary>
+        /// Initializes a new instance of the <c>CodeBase</c> class. 
+        /// </summary>
+		public CodecBase()
+		{
+            try
+            {
+                _hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned);
+                _hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned);
+            }
+            catch (Exception)
+            {
+                CleanUp(false);
+                throw;
+            }
+        }
+
+
+        #region Codec Members
+
+        /// <summary>
+        /// Occurs when more processed data are available.
+        /// </summary>
+        public event DataAvailableHandler DataAvailable;
+
+        /// <summary>
+        /// Fires the <see cref="DataAvailable"/> event
+        /// </summary>
+        protected void OnDataAvailable()
+        {
+            if (_ztream.total_out > 0)
+            {
+                if (DataAvailable != null)
+                    DataAvailable( _outBuffer, 0, (int)_ztream.total_out); 
+                resetOutput();
+            }
+        }
+
+        /// <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>
+        public void Add(byte[] data)
+        {
+            Add(data,0,data.Length);
+        }
+
+        /// <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>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Add(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Finish();
+
+        /// <summary>
+        /// Gets the checksum of the data that has been added so far
+        /// </summary>
+        public uint Checksum { get { return _checksum; } }
+
+        #endregion
+
+        #region Destructor & IDisposable stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~CodecBase()
+        {
+            CleanUp(false);
+        }
+
+        /// <summary>
+        /// Releases any unmanaged resources and calls the <see cref="CleanUp()"/> method of the derived class
+        /// </summary>
+        public void Dispose()
+        {
+            CleanUp(true);
+        }
+
+        /// <summary>
+        /// Performs any codec specific cleanup
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        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
+
+        /// <summary>
+        /// Copies a number of bytes to the internal codec buffer - ready for proccesing
+        /// </summary>
+        /// <param name="data">The byte array that contains the data to copy</param>
+        /// <param name="startIndex">The index of the first byte to copy</param>
+        /// <param name="count">The number of bytes to copy from <c>data</c></param>
+        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;
+
+        }
+
+        /// <summary>
+        /// Resets the internal output buffers to a known state - ready for processing
+        /// </summary>
+        protected void resetOutput()
+        {
+            _ztream.total_out = 0;
+            _ztream.avail_out = kBufferSize;
+            _ztream.next_out = _hOutput.AddrOfPinnedObject();
+        }
+
+        /// <summary>
+        /// Updates the running checksum property
+        /// </summary>
+        /// <param name="newSum">The new checksum value</param>
+        protected void setChecksum(uint newSum)
+        {
+            _checksum = newSum;
+        }
+        #endregion
+
+    }
+}

contrib/dotzlib/DotZLib/Deflater.cs

@@ -0,0 +1,106 @@
+//
+// <20> 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
+{
+
+    /// <summary>
+    /// Implements a data compressor, using the deflate algorithm in the ZLib dll
+    /// </summary>
+	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
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Deflater</c>
+        /// </summary>
+        /// <param name="level">The compression level to use for this <c>Deflater</c></param>
+		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();
+		}
+
+        /// <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>
+        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 );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        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();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib deflate stream
+        /// </summary>
+        protected override void CleanUp() { deflateEnd(ref _ztream); }
+
+    }
+}

contrib/dotzlib/DotZLib/DotZLib.cs

@@ -0,0 +1,288 @@
+//
+// <20> 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
+
+}

contrib/dotzlib/DotZLib/DotZLib.csproj

@@ -0,0 +1,141 @@
+<VisualStudioProject>
+    <CSHARP
+        ProjectType = "Local"
+        ProductVersion = "7.10.3077"
+        SchemaVersion = "2.0"
+        ProjectGuid = "{BB1EE0B1-1808-46CB-B786-949D91117FC5}"
+    >
+        <Build>
+            <Settings
+                ApplicationIcon = ""
+                AssemblyKeyContainerName = ""
+                AssemblyName = "DotZLib"
+                AssemblyOriginatorKeyFile = ""
+                DefaultClientScript = "JScript"
+                DefaultHTMLPageLayout = "Grid"
+                DefaultTargetSchema = "IE50"
+                DelaySign = "false"
+                OutputType = "Library"
+                PreBuildEvent = ""
+                PostBuildEvent = ""
+                RootNamespace = "DotZLib"
+                RunPostBuildEvent = "OnBuildSuccess"
+                StartupObject = ""
+            >
+                <Config
+                    Name = "Debug"
+                    AllowUnsafeBlocks = "false"
+                    BaseAddress = "285212672"
+                    CheckForOverflowUnderflow = "false"
+                    ConfigurationOverrideFile = ""
+                    DefineConstants = "DEBUG;TRACE"
+                    DocumentationFile = "docs\DotZLib.xml"
+                    DebugSymbols = "true"
+                    FileAlignment = "4096"
+                    IncrementalBuild = "false"
+                    NoStdLib = "false"
+                    NoWarn = "1591"
+                    Optimize = "false"
+                    OutputPath = "bin\Debug\"
+                    RegisterForComInterop = "false"
+                    RemoveIntegerChecks = "false"
+                    TreatWarningsAsErrors = "false"
+                    WarningLevel = "4"
+                />
+                <Config
+                    Name = "Release"
+                    AllowUnsafeBlocks = "false"
+                    BaseAddress = "285212672"
+                    CheckForOverflowUnderflow = "false"
+                    ConfigurationOverrideFile = ""
+                    DefineConstants = "TRACE"
+                    DocumentationFile = "docs\DotZLib.xml"
+                    DebugSymbols = "false"
+                    FileAlignment = "4096"
+                    IncrementalBuild = "false"
+                    NoStdLib = "false"
+                    NoWarn = ""
+                    Optimize = "true"
+                    OutputPath = "bin\Release\"
+                    RegisterForComInterop = "false"
+                    RemoveIntegerChecks = "false"
+                    TreatWarningsAsErrors = "false"
+                    WarningLevel = "4"
+                />
+            </Settings>
+            <References>
+                <Reference
+                    Name = "System"
+                    AssemblyName = "System"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.dll"
+                />
+                <Reference
+                    Name = "System.Data"
+                    AssemblyName = "System.Data"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.Data.dll"
+                />
+                <Reference
+                    Name = "System.XML"
+                    AssemblyName = "System.Xml"
+                    HintPath = "C:\WINNT\Microsoft.NET\Framework\v1.1.4322\System.XML.dll"
+                />
+                <Reference
+                    Name = "nunit.framework"
+                    AssemblyName = "nunit.framework"
+                    HintPath = "E:\apps\NUnit V2.1\\bin\nunit.framework.dll"
+                    AssemblyFolderKey = "hklm\dn\nunit.framework"
+                />
+            </References>
+        </Build>
+        <Files>
+            <Include>
+                <File
+                    RelPath = "AssemblyInfo.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "ChecksumImpl.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "CircularBuffer.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "CodecBase.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "Deflater.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "DotZLib.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "GZipStream.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "Inflater.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "UnitTests.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+            </Include>
+        </Files>
+    </CSHARP>
+</VisualStudioProject>
+

contrib/dotzlib/DotZLib/GZipStream.cs

@@ -0,0 +1,301 @@
+//
+// <20> 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
+{
+	/// <summary>
+	/// Implements a compressed <see cref="Stream"/>, in GZip (.gz) format.
+	/// </summary>
+	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
+        /// <summary>
+        /// Creates a new file as a writeable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the compressed file to create</param>
+        /// <param name="level">The compression level to use when adding data</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+		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);
+		}
+
+        /// <summary>
+        /// Opens an existing file as a readable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the file to open</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+        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
+        /// <summary>
+        /// Returns true of this stream can be read from, false otherwise
+        /// </summary>
+        public override bool CanRead
+        {
+            get
+            {
+                return !_isWriting;
+            }
+        }
+    
+
+        /// <summary>
+        /// Returns false.
+        /// </summary>
+        public override bool CanSeek
+        {
+            get
+            {
+                return false;
+            }
+        }
+    
+        /// <summary>
+        /// Returns true if this tsream is writeable, false otherwise
+        /// </summary>
+        public override bool CanWrite
+        {
+            get
+            {
+                return _isWriting;
+            }
+        }
+        #endregion
+    
+        #region Destructor & IDispose stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~GZipStream()
+        {
+            cleanUp(false);
+        }
+
+        /// <summary>
+        /// Closes the external file handle
+        /// </summary>
+        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
+        /// <summary>
+        /// Attempts to read a number of bytes from the stream.
+        /// </summary>
+        /// <param name="buffer">The destination data buffer</param>
+        /// <param name="offset">The index of the first destination byte in <c>buffer</c></param>
+        /// <param name="count">The number of bytes requested</param>
+        /// <returns>The number of bytes read</returns>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not readable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        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;
+        }
+
+        /// <summary>
+        /// Attempts to read a single byte from the stream.
+        /// </summary>
+        /// <returns>The byte that was read, or -1 in case of error or End-Of-File</returns>
+        public override int ReadByte()
+        {
+            if (!CanRead) throw new NotSupportedException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+            return gzgetc(_gzFile);
+        }
+
+        /// <summary>
+        /// Writes a number of bytes to the stream
+        /// </summary>
+        /// <param name="buffer"></param>
+        /// <param name="offset"></param>
+        /// <param name="count"></param>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        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();
+            }
+        }
+
+        /// <summary>
+        /// Writes a single byte to the stream
+        /// </summary>
+        /// <param name="value">The byte to add to the stream.</param>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        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
+        /// <summary>
+        /// Not supported.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override void SetLength(long value)
+        {
+            throw new NotSupportedException();
+        }
+    
+        /// <summary>
+        ///  Not suppported.
+        /// </summary>
+        /// <param name="offset"></param>
+        /// <param name="origin"></param>
+        /// <returns></returns>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Seek(long offset, SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+    
+        /// <summary>
+        /// Flushes the <c>GZipStream</c>.
+        /// </summary>
+        /// <remarks>In this implementation, this method does nothing. This is because excessive
+        /// flushing may degrade the achievable compression rates.</remarks>
+        public override void Flush()
+        {
+            // left empty on purpose
+        }
+    
+        /// <summary>
+        /// Gets/sets the current position in the <c>GZipStream</c>. Not suppported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Position
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+            set
+            {
+                throw new NotSupportedException();
+            }
+        }
+    
+        /// <summary>
+        /// Gets the size of the stream. Not suppported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Length
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+        }
+        #endregion
+    }
+}

contrib/dotzlib/DotZLib/Inflater.cs

@@ -0,0 +1,105 @@
+//
+// <20> 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
+{
+    
+    /// <summary>
+    /// Implements a data decompressor, using the inflate algorithm in the ZLib dll
+    /// </summary>
+    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
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Inflater</c>
+        /// </summary>
+        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();
+        }
+
+
+        /// <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>
+        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 );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        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();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib inflate stream
+        /// </summary>
+        protected override void CleanUp() { inflateEnd(ref _ztream); }
+
+
+	}
+}

contrib/dotzlib/DotZLib/UnitTests.cs

@@ -0,0 +1,274 @@
+//
+// <20> 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("1.2.2", 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

contrib/dotzlib/LICENSE_1_0.txt

@@ -0,0 +1,23 @@
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

contrib/dotzlib/readme.txt

@@ -0,0 +1,58 @@
+This directory contains a .Net wrapper class library for the ZLib1.dll
+
+The wrapper includes support for inflating/deflating memory buffers, 
+.Net streaming wrappers for the gz streams part of zlib, and wrappers
+for the checksum parts of zlib. See DotZLib/UnitTests.cs for examples.
+
+Directory structure:
+--------------------
+
+LICENSE_1_0.txt       - License file.
+readme.txt            - This file.
+DotZLib.chm           - Class library documentation
+DotZLib.build         - NAnt build file
+DotZLib.sln           - Microsoft Visual Studio 2003 solution file
+
+DotZLib\*.cs          - Source files for the class library
+
+Unit tests:
+-----------
+The file DotZLib/UnitTests.cs contains unit tests for use with NUnit 2.1 or higher.
+To include unit tests in the build, define nunit before building.
+
+
+Build instructions:
+-------------------
+
+1. Using Visual Studio.Net 2003:
+   Open DotZLib.sln in VS.Net and build from there. Output file (DotZLib.dll)
+   will be found ./DotZLib/bin/release or ./DotZLib/bin/debug, depending on 
+   you are building the release or debug version of the library. Check 
+   DotZLib/UnitTests.cs for instructions on how to include unit tests in the
+   build.
+   
+2. Using NAnt:
+   Open a command prompt with access to the build environment and run nant
+   in the same directory as the DotZLib.build file.
+   You can define 2 properties on the nant command-line to control the build:
+   debug={true|false} to toggle between release/debug builds (default=true).
+   nunit={true|false} to include or esclude unit tests (default=true).
+   Also the target clean will remove binaries.
+   Output file (DotZLib.dll) will be found in either ./DotZLib/bin/release 
+   or ./DotZLib/bin/debug, depending on whether you are building the release 
+   or debug version of the library.
+
+   Examples: 
+     nant -D:debug=false -D:nunit=false
+       will build a release mode version of the library without unit tests.
+     nant
+       will build a debug version of the library with unit tests 
+     nant clean
+       will remove all previously built files.
+
+
+---------------------------------
+Copyright (c) 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)

contrib/gzappend/gzappend.c

@@ -48,10 +48,10 @@
    unfriendly behavior that if gzappend fails, the gzip file is corrupted.
 
    This program was written to illustrate the use of the new Z_BLOCK option of
-   zlib 1.2.1's inflate() function.  This option returns from inflate() at each
+   zlib 1.2.x's inflate() function.  This option returns from inflate() at each
    block boundary to facilitate locating and modifying the last block bit at
    the start of the final deflate block.  Also whether using Z_BLOCK or not,
-   another required feature of zlib 1.2.1 is that inflate() now provides the
+   another required feature of zlib 1.2.x is that inflate() now provides the
    number of unusued bits in the last input byte used.  gzappend will not work
    with versions of zlib earlier than 1.2.1.
 

contrib/infback9/inftree9.c

@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate9_copyright[] =
-   " inflate9 1.2.1.2 Copyright 1995-2004 Mark Adler ";
+   " inflate9 1.2.2.1 Copyright 1995-2004 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -64,7 +64,7 @@ unsigned short FAR *work;
     static const unsigned short lext[31] = { /* Length codes 257..285 extra */
         128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
         130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
-        133, 133, 133, 133, 144, 77, 194};
+        133, 133, 133, 133, 144, 77, 207};
     static const unsigned short dbase[32] = { /* Distance codes 0..31 base */
         1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49,
         65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073,

contrib/inflate86/inffast.S

@@ -188,17 +188,8 @@
 /*
  * typedef enum inflate_mode consts, in inflate.h
  */
-#ifndef NO_GUNZIP
-#define GUNZIP
-#endif
-
-#ifdef GUNZIP
 #define INFLATE_MODE_TYPE 11  /* state->mode flags enum-ed in inflate.h */
 #define INFLATE_MODE_BAD  26
-#else
-#define INFLATE_MODE_TYPE 3
-#define INFLATE_MODE_BAD  17
-#endif
 
 
 #if ! defined( USE_MMX ) && ! defined( NO_MMX )

contrib/minizip/ioapi.c

@@ -94,7 +94,7 @@ uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
    uLong size;
 {
     uLong ret;
-    ret = fread(buf, 1, (size_t)size, (FILE *)stream);
+    ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
     return ret;
 }
 
@@ -106,7 +106,7 @@ uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
    uLong size;
 {
     uLong ret;
-    ret = fwrite(buf, 1, (size_t)size, (FILE *)stream);
+    ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
     return ret;
 }
 

contrib/minizip/unzip.c

@@ -1,5 +1,5 @@
 /* unzip.c -- IO for uncompress .zip files using zlib
-   Version 1.01c, August 23th, 2004
+   Version 1.01d, September 22th, 2004
 
    Copyright (C) 1998-2004 Gilles Vollant
 
@@ -1250,10 +1250,12 @@ extern int ZEXPORT unzReadCurrentFile  (file, buf, len)
         pfile_in_zip_read_info->stream.avail_out =
             (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
 
-    if ((len>pfile_in_zip_read_info->rest_read_compressed) &&
+    if ((len>pfile_in_zip_read_info->rest_read_compressed+
+           pfile_in_zip_read_info->stream.avail_in) &&
          (pfile_in_zip_read_info->raw))
         pfile_in_zip_read_info->stream.avail_out =
-            (uInt)pfile_in_zip_read_info->rest_read_compressed; 
+            (uInt)pfile_in_zip_read_info->rest_read_compressed+
+            pfile_in_zip_read_info->stream.avail_in;
 
     while (pfile_in_zip_read_info->stream.avail_out>0)
     {

contrib/minizip/zip.c

@@ -717,9 +717,9 @@ extern int ZEXPORT zipOpenNewFileInZip3 (file, filename, zipfi,
     if (comment==NULL)
         size_comment = 0;
     else
-        size_comment = strlen(comment);
+        size_comment = (uInt)strlen(comment);
 
-    size_filename = strlen(filename);
+    size_filename = (uInt)strlen(filename);
 
     if (zipfi == NULL)
         zi->ci.dosDate = 0;
@@ -1126,7 +1126,7 @@ extern int ZEXPORT zipClose (file, global_comment)
     if (global_comment==NULL)
         size_global_comment = 0;
     else
-        size_global_comment = strlen(global_comment);
+        size_global_comment = (uInt)strlen(global_comment);
 
 
     centraldir_pos_inzip = ZTELL(zi->z_filefunc,zi->filestream);

contrib/vstudio/vc7/zlib.rc

@@ -2,8 +2,8 @@
 
 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1,2,1,2
+  FILEVERSION	 1,2,2,1
-  PRODUCTVERSION 1,2,1,2
+  PRODUCTVERSION 1,2,2,1
   FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
   FILEFLAGS	0
   FILEOS	VOS_DOS_WINDOWS32
@@ -17,7 +17,7 @@ BEGIN
 
     BEGIN
       VALUE "FileDescription", "zlib data compression library\0"
-      VALUE "FileVersion",	"1.2.1.2\0"
+      VALUE "FileVersion",	"1.2.2.1\0"
       VALUE "InternalName",	"zlib\0"
       VALUE "OriginalFilename",	"zlib.dll\0"
       VALUE "ProductName",	"ZLib.DLL\0"

crc32.c

@@ -1,22 +1,22 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
  * CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
  * tables for updating the shift register in one step with three exclusive-ors
- * instead of four steps with four exclusive-ors.  This results about a factor
+ * instead of four steps with four exclusive-ors.  This results in about a
- * of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
+ * factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
  */
 
 /* @(#) $Id$ */
 
 /*
-  Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore protection
+  Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
-  on the static variables used to control the first-use generation of the crc
+  protection on the static variables used to control the first-use generation
-  tables.  Therefore if you #define DYNAMIC_CRC_TABLE, you should first call
+  of the crc tables.  Therefore, if you #define DYNAMIC_CRC_TABLE, you should
-  get_crc_table() to initialize the tables before allowing more than on thread
+  first call get_crc_table() to initialize the tables before allowing more than
-  to use crc32().
+  one thread to use crc32().
  */
 
 #ifdef MAKECRCH
@@ -72,6 +72,9 @@ local void make_crc_table OF((void));
 #ifdef MAKECRCH
    local void write_table OF((FILE *, const unsigned long FAR *));
 #endif /* MAKECRCH */
+local unsigned long gf2_matrix_times OF((unsigned long *mat,
+                                         unsigned long vec));
+local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
 
 /*
   Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
@@ -128,8 +131,8 @@ local void make_crc_table()
         }
 
 #ifdef BYFOUR
-		/* generate crc for each value followed by one, two, and three zeros, and
+        /* generate crc for each value followed by one, two, and three zeros,
-		   then the byte reversal of those as well as the first table */
+           and then the byte reversal of those as well as the first table */
         for (n = 0; n < 256; n++) {
             c = crc_table[0][n];
             crc_table[4][n] = REV(c);
@@ -144,7 +147,7 @@ local void make_crc_table()
         crc_table_empty = 0;
     }
     else {      /* not first */
-		/* wait for the other guy to finish (not exactly efficient, but rare) */
+        /* wait for the other guy to finish (not efficient, but rare) */
         while (crc_table_empty)
             ;
     }
@@ -331,3 +334,89 @@ local unsigned long crc32_big(crc, buf, len)
 }
 
 #endif /* BYFOUR */
+
+#define GF2_DIM 32      /* dimension of GF(2) vectors (length of CRC) */
+
+/* ========================================================================= */
+local unsigned long gf2_matrix_times(mat, vec)
+    unsigned long *mat;
+    unsigned long vec;
+{
+    unsigned long sum;
+
+    sum = 0;
+    while (vec) {
+        if (vec & 1)
+            sum ^= *mat;
+        vec >>= 1;
+        mat++;
+    }
+    return sum;
+}
+
+/* ========================================================================= */
+local void gf2_matrix_square(square, mat)
+    unsigned long *square;
+    unsigned long *mat;
+{
+    int n;
+
+    for (n = 0; n < GF2_DIM; n++)
+        square[n] = gf2_matrix_times(mat, mat[n]);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT crc32_combine(crc1, crc2, len2)
+    uLong crc1;
+    uLong crc2;
+    uLong len2;
+{
+    int n;
+    unsigned long row;
+    unsigned long even[GF2_DIM];    /* even-power-of-two zeros operator */
+    unsigned long odd[GF2_DIM];     /* odd-power-of-two zeros operator */
+
+    /* degenerate case */
+    if (len2 == 0)
+        return crc1;
+
+    /* put operator for one zero bit in odd */
+    odd[0] = 0xedb88320L;           /* CRC-32 polynomial */
+    row = 1;
+    for (n = 1; n < GF2_DIM; n++) {
+        odd[n] = row;
+        row <<= 1;
+    }
+
+    /* put operator for two zero bits in even */
+    gf2_matrix_square(even, odd);
+
+    /* put operator for four zero bits in odd */
+    gf2_matrix_square(odd, even);
+
+    /* apply len2 zeros to crc1 (first square will put the operator for one
+       zero byte, eight zero bits, in even) */
+    do {
+        /* apply zeros operator for this bit of len2 */
+        gf2_matrix_square(even, odd);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(even, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+        if (len2 == 0)
+            break;
+
+        /* another iteration of the loop with odd and even swapped */
+        gf2_matrix_square(odd, even);
+        if (len2 & 1)
+            crc1 = gf2_matrix_times(odd, crc1);
+        len2 >>= 1;
+
+        /* if no more bits set, then done */
+    } while (len2 != 0);
+
+    /* return combined crc */
+    crc1 ^= crc2;
+    return crc1;
+}

deflate.c

@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -52,7 +52,7 @@
 #include "deflate.h"
 
 const char deflate_copyright[] =
-   " deflate 1.2.1.2 Copyright 1995-2004 Jean-loup Gailly ";
+   " deflate 1.2.2.1 Copyright 1995-2004 Jean-loup Gailly ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -274,6 +274,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
     s->strm = strm;
 
     s->wrap = wrap;
+    s->gzhead = Z_NULL;
     s->w_bits = windowBits;
     s->w_size = 1 << s->w_bits;
     s->w_mask = s->w_size - 1;
@@ -390,6 +391,17 @@ int ZEXPORT deflateReset (strm)
     return Z_OK;
 }
 
+/* ========================================================================= */
+int ZEXPORT deflateSetHeader (strm, head)
+    z_streamp strm;
+    gz_headerp head;
+{
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+    strm->state->gzhead = head;
+    return Z_OK;
+}
+
 /* ========================================================================= */
 int ZEXPORT deflatePrime (strm, bits, value)
     z_streamp strm;
@@ -548,9 +560,11 @@ int ZEXPORT deflate (strm, flush)
     if (s->status == INIT_STATE) {
 #ifdef GZIP
         if (s->wrap == 2) {
+            strm->adler = crc32(0L, Z_NULL, 0);
             put_byte(s, 31);
             put_byte(s, 139);
             put_byte(s, 8);
+            if (s->gzhead == NULL) {
                 put_byte(s, 0);
                 put_byte(s, 0);
                 put_byte(s, 0);
@@ -561,7 +575,32 @@ int ZEXPORT deflate (strm, flush)
                              4 : 0));
                 put_byte(s, 255);
                 s->status = BUSY_STATE;
-            strm->adler = crc32(0L, Z_NULL, 0);
+            }
+            else {
+                put_byte(s, (s->gzhead->text ? 1 : 0) +
+                            (s->gzhead->hcrc ? 2 : 0) +
+                            (s->gzhead->extra == Z_NULL ? 0 : 4) +
+                            (s->gzhead->name == Z_NULL ? 0 : 8) +
+                            (s->gzhead->comment == Z_NULL ? 0 : 16)
+                        );
+                put_byte(s, s->gzhead->time & 0xff);
+                put_byte(s, (s->gzhead->time >> 8) & 0xff);
+                put_byte(s, (s->gzhead->time >> 16) & 0xff);
+                put_byte(s, (s->gzhead->time >> 24) & 0xff);
+                put_byte(s, s->level == 9 ? 2 :
+                            (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+                             4 : 0));
+                put_byte(s, s->gzhead->os & 0xff);
+                if (s->gzhead->extra != NULL) {
+                    put_byte(s, s->gzhead->extra_len & 0xff);
+                    put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+                }
+                if (s->gzhead->hcrc)
+                    strm->adler = crc32(strm->adler, s->pending_buf,
+                                        s->pending);
+                s->gzindex = 0;
+                s->status = EXTRA_STATE;
+            }
         }
         else
 #endif
@@ -592,6 +631,110 @@ int ZEXPORT deflate (strm, flush)
             strm->adler = adler32(0L, Z_NULL, 0);
         }
     }
+#ifdef GZIP
+    if (s->status == EXTRA_STATE) {
+        if (s->gzhead->extra != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+
+            while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size)
+                        break;
+                }
+                put_byte(s, s->gzhead->extra[s->gzindex]);
+                s->gzindex++;
+            }
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (s->gzindex == s->gzhead->extra_len) {
+                s->gzindex = 0;
+                s->status = NAME_STATE;
+            }
+        }
+        else
+            s->status = NAME_STATE;
+    }
+    if (s->status == NAME_STATE) {
+        if (s->gzhead->name != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->name[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0) {
+                s->gzindex = 0;
+                s->status = COMMENT_STATE;
+            }
+        }
+        else
+            s->status = COMMENT_STATE;
+    }
+    if (s->status == COMMENT_STATE) {
+        if (s->gzhead->comment != NULL) {
+            int beg = s->pending;   /* start of bytes to update crc */
+            int val;
+
+            do {
+                if (s->pending == s->pending_buf_size) {
+                    if (s->gzhead->hcrc && s->pending > beg)
+                        strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                            s->pending - beg);
+                    flush_pending(strm);
+                    beg = s->pending;
+                    if (s->pending == s->pending_buf_size) {
+                        val = 1;
+                        break;
+                    }
+                }
+                val = s->gzhead->comment[s->gzindex++];
+                put_byte(s, val);
+            } while (val != 0);
+            if (s->gzhead->hcrc && s->pending > beg)
+                strm->adler = crc32(strm->adler, s->pending_buf + beg,
+                                    s->pending - beg);
+            if (val == 0)
+                s->status = HCRC_STATE;
+        }
+        else
+            s->status = HCRC_STATE;
+    }
+    if (s->status == HCRC_STATE) {
+        if (s->gzhead->hcrc) {
+            if (s->pending + 2 > s->pending_buf_size)
+                flush_pending(strm);
+            if (s->pending + 2 <= s->pending_buf_size) {
+                put_byte(s, strm->adler & 0xff);
+                put_byte(s, (strm->adler >> 8) & 0xff);
+                strm->adler = crc32(0L, Z_NULL, 0);
+                s->status = BUSY_STATE;
+            }
+        }
+        else
+            s->status = BUSY_STATE;
+    }
+#endif
 
     /* Flush as much pending output as possible */
     if (s->pending != 0) {
@@ -704,7 +847,12 @@ int ZEXPORT deflateEnd (strm)
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
 
     status = strm->state->status;
-    if (status != INIT_STATE && status != BUSY_STATE &&
+    if (status != INIT_STATE &&
+        status != EXTRA_STATE &&
+        status != NAME_STATE &&
+        status != COMMENT_STATE &&
+        status != HCRC_STATE &&
+        status != BUSY_STATE &&
         status != FINISH_STATE) {
       return Z_STREAM_ERROR;
     }

deflate.h

@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2002 Jean-loup Gailly
+ * Copyright (C) 1995-2004 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -49,6 +49,10 @@
 /* All codes must not exceed MAX_BITS bits */
 
 #define INIT_STATE    42
+#define EXTRA_STATE   69
+#define NAME_STATE    73
+#define COMMENT_STATE 91
+#define HCRC_STATE   103
 #define BUSY_STATE   113
 #define FINISH_STATE 666
 /* Stream status */
@@ -95,6 +99,8 @@ typedef struct internal_state {
     Bytef *pending_out;  /* next pending byte to output to the stream */
     int   pending;       /* nb of bytes in the pending buffer */
     int   wrap;          /* bit 0 true for zlib, bit 1 true for gzip */
+    gz_headerp  gzhead;  /* gzip header information to write */
+    int   gzindex;       /* where in extra, name, or comment */
     Byte  method;        /* STORED (for zip only) or DEFLATED */
     int   last_flush;    /* value of flush param for previous deflate call */
 

example.c

@@ -1,5 +1,5 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,8 +11,6 @@
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif
 
 #if defined(VMS) || defined(RISCOS)

gzio.c

@@ -1,5 +1,5 @@
 /* gzio.c -- IO on .gz files
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
@@ -11,7 +11,7 @@
 
 #include "zutil.h"
 
-#ifdef NO_DEFLATE       /* for compatiblity with old definition */
+#ifdef NO_DEFLATE       /* for compatibility with old definition */
 #  define NO_GZCOMPRESS
 #endif
 
@@ -941,7 +941,6 @@ local uLong getLong (s)
 int ZEXPORT gzclose (file)
     gzFile file;
 {
-    int err;
     gz_stream *s = (gz_stream*)file;
 
     if (s == NULL) return Z_STREAM_ERROR;
@@ -950,8 +949,8 @@ int ZEXPORT gzclose (file)
 #ifdef NO_GZCOMPRESS
         return Z_STREAM_ERROR;
 #else
-        err = do_flush (file, Z_FINISH);
+        if (do_flush (file, Z_FINISH) != Z_OK)
-        if (err != Z_OK) return destroy((gz_stream*)file);
+            return destroy((gz_stream*)file);
 
         putLong (s->file, s->crc);
         putLong (s->file, (uLong)(s->in & 0xffffffff));

infback.c

@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -26,7 +26,7 @@ local void fixedtables OF((struct inflate_state FAR *state));
    window and output buffer that is 2**windowBits bytes.
  */
 int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
-z_stream FAR *strm;
+z_streamp strm;
 int windowBits;
 unsigned char FAR *window;
 const char *version;
@@ -238,7 +238,7 @@ struct inflate_state FAR *state;
    are not correct, i.e. strm is Z_NULL or the state was not initialized.
  */
 int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
-z_stream FAR *strm;
+z_streamp strm;
 in_func in;
 void FAR *in_desc;
 out_func out;
@@ -611,7 +611,7 @@ void FAR *out_desc;
 }
 
 int ZEXPORT inflateBackEnd(strm)
-z_stream FAR *strm;
+z_streamp strm;
 {
     if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
         return Z_STREAM_ERROR;

inflate.c

@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -109,9 +109,11 @@ z_streamp strm;
     state = (struct inflate_state FAR *)strm->state;
     strm->total_in = strm->total_out = state->total = 0;
     strm->msg = Z_NULL;
+    strm->adler = 1;        /* to support ill-conceived Java test suite */
     state->mode = HEAD;
     state->last = 0;
     state->havedict = 0;
+    state->head = Z_NULL;
     state->wsize = 0;
     state->whave = 0;
     state->hold = 0;
@@ -581,6 +583,8 @@ int flush;
                 break;
             }
             state->flags = 0;           /* expect zlib header */
+            if (state->head != Z_NULL)
+                state->head->done = -1;
             if (!(state->wrap & 1) ||   /* check if zlib header allowed */
 #else
             if (
@@ -620,16 +624,24 @@ int flush;
                 state->mode = BAD;
                 break;
             }
+            if (state->head != Z_NULL)
+                state->head->text = (int)((hold >> 8) & 1);
             if (state->flags & 0x0200) CRC2(state->check, hold);
             INITBITS();
             state->mode = TIME;
         case TIME:
             NEEDBITS(32);
+            if (state->head != Z_NULL)
+                state->head->time = hold;
             if (state->flags & 0x0200) CRC4(state->check, hold);
             INITBITS();
             state->mode = OS;
         case OS:
             NEEDBITS(16);
+            if (state->head != Z_NULL) {
+                state->head->xflags = (int)(hold & 0xff);
+                state->head->os = (int)(hold >> 8);
+            }
             if (state->flags & 0x0200) CRC2(state->check, hold);
             INITBITS();
             state->mode = EXLEN;
@@ -637,15 +649,26 @@ int flush;
             if (state->flags & 0x0400) {
                 NEEDBITS(16);
                 state->length = (unsigned)(hold);
+                if (state->head != Z_NULL)
+                    state->head->extra_len = (unsigned)hold;
                 if (state->flags & 0x0200) CRC2(state->check, hold);
                 INITBITS();
             }
+            else if (state->head != Z_NULL)
+                state->head->extra = Z_NULL;
             state->mode = EXTRA;
         case EXTRA:
             if (state->flags & 0x0400) {
                 copy = state->length;
                 if (copy > have) copy = have;
                 if (copy) {
+                    if (state->head != Z_NULL &&
+                        state->head->extra != Z_NULL) {
+                        len = state->head->extra_len - state->length;
+                        zmemcpy(state->head->extra + len, next,
+                                len + copy > state->head->extra_max ?
+                                state->head->extra_max - len : copy);
+                    }
                     if (state->flags & 0x0200)
                         state->check = crc32(state->check, next, copy);
                     have -= copy;
@@ -654,6 +677,7 @@ int flush;
                 }
                 if (state->length) goto inf_leave;
             }
+            state->length = 0;
             state->mode = NAME;
         case NAME:
             if (state->flags & 0x0800) {
@@ -661,13 +685,20 @@ int flush;
                 copy = 0;
                 do {
                     len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->name != Z_NULL &&
+                            state->length < state->head->name_max)
+                        state->head->name[state->length++] = len;
                 } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                     state->check = crc32(state->check, next, copy);
                 have -= copy;
                 next += copy;
                 if (len) goto inf_leave;
             }
+            else if (state->head != Z_NULL)
+                state->head->name = Z_NULL;
+            state->length = 0;
             state->mode = COMMENT;
         case COMMENT:
             if (state->flags & 0x1000) {
@@ -675,13 +706,19 @@ int flush;
                 copy = 0;
                 do {
                     len = (unsigned)(next[copy++]);
+                    if (state->head != Z_NULL &&
+                            state->head->comment != Z_NULL &&
+                            state->length < state->head->comm_max)
+                        state->head->comment[state->length++] = len;
                 } while (len && copy < have);
-                if (state->flags & 0x02000)
+                if (state->flags & 0x0200)
                     state->check = crc32(state->check, next, copy);
                 have -= copy;
                 next += copy;
                 if (len) goto inf_leave;
             }
+            else if (state->head != Z_NULL)
+                state->head->comment = Z_NULL;
             state->mode = HCRC;
         case HCRC:
             if (state->flags & 0x0200) {
@@ -693,6 +730,10 @@ int flush;
                 }
                 INITBITS();
             }
+            if (state->head != Z_NULL) {
+                state->head->hcrc = (int)((state->flags >> 9) & 1);
+                state->head->done = 1;
+            }
             strm->adler = state->check = crc32(0L, Z_NULL, 0);
             state->mode = TYPE;
             break;
@@ -1109,12 +1150,16 @@ uInt dictLength;
     /* check state */
     if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
     state = (struct inflate_state FAR *)strm->state;
-    if (state->mode != DICT) return Z_STREAM_ERROR;
+    if (state->wrap != 0 && state->mode != DICT)
+        return Z_STREAM_ERROR;
 
     /* check for correct dictionary id */
+    if (state->mode == DICT) {
         id = adler32(0L, Z_NULL, 0);
         id = adler32(id, dictionary, dictLength);
-    if (id != state->check) return Z_DATA_ERROR;
+        if (id != state->check)
+            return Z_DATA_ERROR;
+    }
 
     /* copy dictionary to window */
     if (updatewindow(strm, strm->avail_out)) {
@@ -1136,6 +1181,23 @@ uInt dictLength;
     return Z_OK;
 }
 
+int ZEXPORT inflateGetHeader(strm, head)
+z_streamp strm;
+gz_headerp head;
+{
+    struct inflate_state FAR *state;
+
+    /* check state */
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    state = (struct inflate_state FAR *)strm->state;
+    if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
+
+    /* save header structure */
+    state->head = head;
+    head->done = 0;
+    return Z_OK;
+}
+
 /*
    Search buf[0..len-1] for the pattern: 0, 0, 0xff, 0xff.  Return when found
    or when out of input.  When called, *have is the number of pattern bytes

inflate.h

@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2003 Mark Adler
+ * Copyright (C) 1995-2004 Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -19,7 +19,6 @@
 /* Possible inflate modes between inflate() calls */
 typedef enum {
     HEAD,       /* i: waiting for magic header */
-#ifdef GUNZIP
     FLAGS,      /* i: waiting for method and flags (gzip) */
     TIME,       /* i: waiting for modification time (gzip) */
     OS,         /* i: waiting for extra flags and operating system (gzip) */
@@ -28,7 +27,6 @@ typedef enum {
     NAME,       /* i: waiting for end of file name (gzip) */
     COMMENT,    /* i: waiting for end of comment (gzip) */
     HCRC,       /* i: waiting for header crc (gzip) */
-#endif
     DICTID,     /* i: waiting for dictionary check value */
     DICT,       /* waiting for inflateSetDictionary() call */
         TYPE,       /* i: waiting for type bits, including last-flag bit */
@@ -45,9 +43,7 @@ typedef enum {
             MATCH,      /* o: waiting for output space to copy string */
             LIT,        /* o: waiting for output space to write literal */
     CHECK,      /* i: waiting for 32-bit check value */
-#ifdef GUNZIP
     LENGTH,     /* i: waiting for 32-bit length (gzip) */
-#endif
     DONE,       /* finished check, done -- remain here until reset */
     BAD,        /* got a data error -- remain here until reset */
     MEM,        /* got an inflate() memory error -- remain here until reset */
@@ -86,6 +82,7 @@ struct inflate_state {
     int flags;                  /* gzip header method and flags (0 if zlib) */
     unsigned long check;        /* protected copy of check value */
     unsigned long total;        /* protected copy of output count */
+    gz_headerp head;            /* where to save gzip header information */
         /* sliding window */
     unsigned wbits;             /* log base 2 of requested window size */
     unsigned wsize;             /* window size or zero if not using window */

inftrees.c

@@ -9,7 +9,7 @@
 #define MAXBITS 15
 
 const char inflate_copyright[] =
-   " inflate 1.2.1.2 Copyright 1995-2004 Mark Adler ";
+   " inflate 1.2.2.1 Copyright 1995-2004 Mark Adler ";
 /*
   If you use the zlib library in a product, an acknowledgment is welcome
   in the documentation of your product. If for some reason you cannot
@@ -62,7 +62,7 @@ unsigned short FAR *work;
         35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
     static const unsigned short lext[31] = { /* Length codes 257..285 extra */
         16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 194};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 207};
     static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
         1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
         257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,

minigzip.c

@@ -1,5 +1,5 @@
 /* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -21,8 +21,6 @@
 #ifdef STDC
 #  include <string.h>
 #  include <stdlib.h>
-#else
-   extern void exit  OF((int));
 #endif
 
 #ifdef USE_MMAP

old/README

@@ -1,3 +1,3 @@
-This directory contains files that have not been updated for zlib 1.2.1
+This directory contains files that have not been updated for zlib 1.2.x
 
 (Volunteers are encouraged to help clean this up.  Thanks.)

projects/README.projects

@@ -10,18 +10,21 @@ please consider submitting the project to the contrib directory.
 Requirements
 ============
 
-- The project must build zlib using exclusively the source files from
+- The project must build zlib using the source files from the official
-  the official zlib distribution.
+  zlib source distribution, exclusively.
 
-- If there are "official" makefiles in the zlib distribution, the builds
+- If the project produces redistributable builds (e.g. shared objects
-  given by the makefiles must be compatible with the builds given by the
+  or DLL files), these builds must be compatible to those produced by
-  project.  These builds are called "official" builds.
+  makefiles, if such makefiles exist in the zlib distribution.
+  In particular, if the project produces a DLL build for the Win32
+  platform, this build must comply to the officially-ammended Win32 DLL
+  Application Binary Interface (ABI), described in win32/DLL_FAQ.txt.
 
-- It is possible to add non-official pieces of code to the project,
+- The project may provide additional build targets, which depend on
-  if the resulting build remains compatible with an official build.
+  3rd-party (unofficially-supported) software, present in the contrib
-  For example, it is possible to add an "ASM build" target besides
+  directory.  For example, it is possible to provide an "ASM build",
-  the regular target, by including ASM source files from the contrib
+  besides the officially-supported build, and have ASM source files
-  directory.
+  among its dependencies.
 
 - If there are significant differences between the project files created
   by different versions of an IDE (e.g. Visual C++ 6.0 vs. 7.0), the name

projects/visualc6/README.txt

@@ -5,23 +5,6 @@ Copyright (C) 2004 Cosmin Truta.
 For conditions of distribution and use, see copyright notice in zlib.h.
 
 
-To use:
-
-1) On the main menu, select "File | Open Workspace".
-   Open "zlib.dsw".
-
-2) Select "Build | Set Active Configuration".
-   Choose the configuration you wish to build.
-
-3) Select "Build | Clean".
-
-4) Select "Build | Build ... (F7)".  Ignore warning messages about
-   not being able to find certain include files (e.g. alloc.h).
-
-5) If you built one of the sample programs (example or minigzip),
-   select "Build | Execute ... (Ctrl+F5)".
-
-
 This project builds the zlib binaries as follows:
 
 * Win32_DLL_Release\zlib1.dll       DLL build
@@ -36,3 +19,55 @@ This project builds the zlib binaries as follows:
 
 For more information regarding the DLL builds, please see the DLL FAQ
 in ..\..\win32\DLL_FAQ.txt.
+
+
+To build and test:
+
+1) On the main menu, select "File | Open Workspace".
+   Open "zlib.dsw".
+
+2) Select "Build | Set Active Configuration".
+   Choose the configuration you wish to build.
+
+3) Select "Build | Clean".
+
+4) Select "Build | Build ... (F7)".  Ignore warning messages about
+   not being able to find certain include files (e.g. alloc.h).
+
+5) If you built one of the sample programs (example or minigzip),
+   select "Build | Execute ... (Ctrl+F5)".
+
+
+To use:
+
+1) Select "Project | Settings (Alt+F7)".
+   Make note of the configuration names used in your project.
+   Usually, these names are "Win32 Release" and "Win32 Debug".
+
+2) In the Workspace window, select the "FileView" tab.
+   Right-click on the root item "Workspace '...'".
+   Select "Insert Project into Workspace".
+   Switch on the checkbox "Dependency of:", and select the name
+   of your project.  Open "zlib.dsp".
+
+3) Select "Build | Configurations".
+   For each configuration of your project:
+   3.1) Choose the zlib configuration you wish to use.
+   3.2) Click on "Add".
+   3.3) Set the new zlib configuration name to the name used by
+        the configuration from the current iteration.
+
+4) Select "Build | Set Active Configuration".
+   Choose the configuration you wish to build.
+
+5) Select "Build | Build ... (F7)".
+
+6) If you built an executable program, select
+   "Build | Execute ... (Ctrl+F5)".
+
+
+Note:
+
+To build the ASM-enabled code, you need Microsoft Assembler
+(ML.EXE).  You can get it by downloading and installing the
+latest Processor Pack for Visual C++ 6.0.

projects/visualc6/example.dsp

@@ -47,7 +47,7 @@ RSC=rc.exe
 # PROP Intermediate_Dir "Win32_DLL_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -58,7 +58,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib1.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_DLL_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "example - Win32 DLL Debug"
 
@@ -73,7 +73,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -84,7 +84,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlib1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_DLL_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Release"
 
@@ -99,7 +99,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_ASM_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -110,7 +110,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib1.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_DLL_ASM_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "example - Win32 DLL ASM Debug"
 
@@ -125,7 +125,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_ASM_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -136,7 +136,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlib1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_DLL_ASM_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "example - Win32 LIB Release"
 
@@ -151,7 +151,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -162,7 +162,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_LIB_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "example - Win32 LIB Debug"
 
@@ -177,7 +177,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -188,7 +188,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlibd.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_LIB_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Release"
 
@@ -203,7 +203,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_ASM_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -214,7 +214,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_LIB_ASM_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "example - Win32 LIB ASM Debug"
 
@@ -229,7 +229,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_ASM_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -240,7 +240,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlibd.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_LIB_ASM_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ENDIF 
 

projects/visualc6/minigzip.dsp

@@ -47,7 +47,7 @@ RSC=rc.exe
 # PROP Intermediate_Dir "Win32_DLL_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -58,7 +58,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib1.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_DLL_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 DLL Debug"
 
@@ -73,7 +73,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -84,7 +84,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlib1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_DLL_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Release"
 
@@ -99,7 +99,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_ASM_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -110,7 +110,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib1.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_DLL_ASM_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 DLL ASM Debug"
 
@@ -125,7 +125,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_DLL_ASM_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -136,7 +136,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlib1d.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_DLL_ASM_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Release"
 
@@ -151,7 +151,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -162,7 +162,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_LIB_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 LIB Debug"
 
@@ -177,7 +177,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -188,7 +188,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlibd.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_LIB_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Release"
 
@@ -203,7 +203,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_ASM_Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
+# ADD BASE CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MD /W3 /O2 /D "WIN32" /D "NDEBUG" /FD /c
 # SUBTRACT CPP /YX
@@ -214,7 +214,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
-# ADD LINK32 zlib.lib /nologo /subsystem:console /machine:I386 /libpath:"Win32_LIB_ASM_Release"
+# ADD LINK32 /nologo /subsystem:console /machine:I386
 
 !ELSEIF  "$(CFG)" == "minigzip - Win32 LIB ASM Debug"
 
@@ -229,7 +229,7 @@ LINK32=link.exe
 # PROP Intermediate_Dir "Win32_LIB_ASM_Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
+# ADD BASE CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
 # ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /D "WIN32" /D "_DEBUG" /FD /GZ /c
 # SUBTRACT CPP /YX
@@ -240,7 +240,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 zlibd.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept /libpath:"Win32_LIB_ASM_Debug"
+# ADD LINK32 /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 
 !ENDIF 
 

projects/visualc6/zlib.dsp

@@ -418,7 +418,73 @@ SOURCE=..\..\win32\zlib1.rc
 # Begin Source File
 
 SOURCE=..\..\contrib\masmx86\gvmat32.asm
+
+!IF  "$(CFG)" == "zlib - Win32 DLL Release"
+
 # PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Release
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Debug
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
+
+# PROP Exclude_From_Build 1
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Release
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Debug
+InputPath=..\..\contrib\masmx86\gvmat32.asm
+InputName=gvmat32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
+!ENDIF 
+
 # End Source File
 # Begin Source File
 
@@ -466,11 +532,6 @@ SOURCE=..\..\contrib\masmx86\gvmat32c.c
 # Begin Source File
 
 SOURCE=..\..\contrib\masmx86\inffas32.asm
-# PROP Exclude_From_Build 1
-# End Source File
-# Begin Source File
-
-SOURCE=..\..\contrib\masmx86\gvmat32.obj
 
 !IF  "$(CFG)" == "zlib - Win32 DLL Release"
 
@@ -482,8 +543,28 @@ SOURCE=..\..\contrib\masmx86\gvmat32.obj
 
 !ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
 
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Release
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
 !ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
 
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_DLL_ASM_Debug
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
 !ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
 
 # PROP Exclude_From_Build 1
@@ -494,39 +575,28 @@ SOURCE=..\..\contrib\masmx86\gvmat32.obj
 
 !ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
 
-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Release
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
 
-!ENDIF 
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
 
-# End Source File
+# End Custom Build
-# Begin Source File
-
-SOURCE=..\..\contrib\masmx86\inffas32.obj
-
-!IF  "$(CFG)" == "zlib - Win32 DLL Release"
-
-# PROP Exclude_From_Build 1
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL Debug"
-
-# PROP Exclude_From_Build 1
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Release"
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 DLL ASM Debug"
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Release"
-
-# PROP Exclude_From_Build 1
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB Debug"
-
-# PROP Exclude_From_Build 1
-
-!ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Release"
 
 !ELSEIF  "$(CFG)" == "zlib - Win32 LIB ASM Debug"
 
+# Begin Custom Build - Assembling...
+IntDir=.\Win32_LIB_ASM_Debug
+InputPath=..\..\contrib\masmx86\inffas32.asm
+InputName=inffas32
+
+"$(IntDir)\$(InputName).obj" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"
+	ml.exe /nologo /c /coff /Cx /Zi /Fo"$(IntDir)\$(InputName).obj" "$(InputPath)"
+
+# End Custom Build
+
 !ENDIF 
 
 # End Source File

qnx/package.qpg

@@ -25,10 +25,10 @@
       <QPG:Files>
          <QPG:Add file="../zconf.h" install="/opt/include/" user="root:sys" permission="644"/>
          <QPG:Add file="../zlib.h" install="/opt/include/" user="root:sys" permission="644"/>
-         <QPG:Add file="../libz.so.1.2.1.2" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="../libz.so.1.2.2.1" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.1.2"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.2.1"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.1.2"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.2.1"/>
-         <QPG:Add file="../libz.so.1.2.1.2" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.2.2.1" install="/opt/lib/" component="slib"/>
       </QPG:Files>
 
       <QPG:PackageFilter>
@@ -63,7 +63,7 @@
             </QPM:ProductDescription>
 
             <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.2.1.2</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.2.2.1</QPM:ReleaseVersion>
                <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
                <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
                <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>

trees.c

@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2003 Jean-loup Gailly
+ * Copyright (C) 1995-2004 Jean-loup Gailly
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -930,8 +930,25 @@ void _tr_flush_block(s, buf, stored_len, eof)
     /* Build the Huffman trees unless a stored block is forced */
     if (s->level > 0) {
 
-         /* Check if the file is ascii or binary */
+        /* Check if the file is binary or text */
-        if (s->strm->data_type == Z_UNKNOWN) set_data_type(s);
+        if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN)
+            set_data_type(s);
+
+#ifdef DEBUG
+        /* Write out literal/length frequencies for benchmarking */
+        if (z_verbose) {
+            FILE *freq;
+            freq = fopen("defreq.txt", "a");
+            if (freq != NULL) {
+                int n;
+                fputs("ltree:", freq);
+                for (n = 0; n < L_CODES; n++)
+                    fprintf(freq, " %d", s->dyn_ltree[n].Freq);
+                putc('\n', freq);
+                fclose(freq);
+            }
+        }
+#endif
 
         /* Construct the literal and distance trees */
         build_tree(s, (tree_desc *)(&(s->l_desc)));
@@ -1117,21 +1134,24 @@ local void compress_block(s, ltree, dtree)
 }
 
 /* ===========================================================================
- * Set the data type to ASCII or BINARY, using a crude approximation:
+ * Set the data type to BINARY or TEXT, using a crude approximation:
- * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
+ * set it to Z_TEXT if all symbols are either printable characters (33 to 255)
- * IN assertion: the fields freq of dyn_ltree are set and the total of all
+ * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise.
- * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+ * IN assertion: the fields Freq of dyn_ltree are set.
  */
 local void set_data_type(s)
     deflate_state *s;
 {
-    int n = 0;
+    int n;
-    unsigned ascii_freq = 0;
+
-    unsigned bin_freq = 0;
+    for (n = 0; n < 9; n++)
-    while (n < 7)        bin_freq += s->dyn_ltree[n++].Freq;
+        if (s->dyn_ltree[n].Freq != 0)
-    while (n < 128)    ascii_freq += s->dyn_ltree[n++].Freq;
+            break;
-    while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
+    if (n == 9)
-    s->strm->data_type = bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII;
+        for (n = 14; n < 32; n++)
+            if (s->dyn_ltree[n].Freq != 0)
+                break;
+    s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY;
 }
 
 /* ===========================================================================

win32/DLL_FAQ.txt

@@ -203,13 +203,11 @@ in the zlib distribution, or at the following location:
     zlib distribution.
 
 
- 8. I need a DLL for my Microsoft .NET project.  What can I do?
+ 8. I need to use zlib in my Microsoft .NET project.  What can I
+    do?
 
-  - We did not implement a COM wrapper around zlib, so you will
+  - Henrik Ravn has contributed a .NET wrapper around zlib.  Look
-    have to develop it yourself, or to get it from somewhere else.
+    into contrib/dotzlib/, inside the zlib distribution.
-
-    If you would be so generous as to contribute such a wrapper,
-    we would like to include it in a future zlib version.
 
 
  9. If my application uses ZLIB1.DLL, should I link it to
@@ -227,8 +225,8 @@ in the zlib distribution, or at the following location:
     depend on it should also be linked to MSVCRT.DLL.
 
 
-10. Why are you saying that ZLIB1.DLL and my application must be
+10. Why are you saying that ZLIB1.DLL and my application should
-    linked to the same C run-time (CRT) library?  I linked my
+    be linked to the same C run-time (CRT) library?  I linked my
     application and my DLLs to different C libraries (e.g. my
     application to a static library, and my DLLs to MSVCRT.DLL),
     and everything works fine.
@@ -279,12 +277,6 @@ in the zlib distribution, or at the following location:
     even run on it.  Furthermore, no serious user should run
     Windows 95 without a proper update installed.
 
-    There is also the fact that the mainstream C compilers for
-    Windows are Microsoft Visual C++ 6.0, and gcc/MinGW.  Both
-    are producing executables that link to MSVCRT.DLL by default,
-    without offering other dynamic CRTs as alternatives easy to
-    select by users.
-
 
 12. Why are you not linking ZLIB1.DLL to
     <<my favorite C run-time library>> ?
@@ -297,27 +289,60 @@ in the zlib distribution, or at the following location:
       to a static C library, you may as well consider linking zlib
       in statically, too.
 
-    * Linking ZLIB1.DLL to CRTDLL.DLL looks very appealing,
+    * Linking ZLIB1.DLL to CRTDLL.DLL looks appealing, because
-      because CRTDLL.DLL is present on every Win32 installation.
+      CRTDLL.DLL is present on every Win32 installation.
-      Unfortunately, it has a series of problems: it raises
+      Unfortunately, it has a series of problems: it does not
-      difficulties when using it with C++ code, it does not work
+      work properly with Microsoft's C++ libraries, it does not
-      with 64-bit file offsets, (and so on...), and Microsoft
+      provide support for 64-bit file offsets, (and so on...),
-      discontinued its support a long time ago.
+      and Microsoft discontinued its support a long time ago.
 
-    * Linking ZLIB1.DLL to MSVCR70.DLL, supplied with the
+    * Linking ZLIB1.DLL to MSVCR70.DLL or MSVCR71.DLL, supplied
-      Microsoft .NET platform and Visual C++ 7.0 or newer, is not
+      with the Microsoft .NET platform, and Visual C++ 7.0/7.1,
-      a good option.  Although it is available for free download
+      raises problems related to the status of ZLIB1.DLL as a
-      and distribution, its presence is scarce on today's Win32
+      system component.  According to the Microsoft Knowledge Base
-      installations.  If it will ever become more popular than
+      article KB326922 "INFO: Redistribution of the Shared C
-      MSVCRT.DLL and will be pre-installed on the future Win32
+      Runtime Component in Visual C++ .NET", MSVCR70.DLL and
-      systems, we will probably think again about it.
+      MSVCR71.DLL are not supposed to function as system DLLs,
+      because they may clash with MSVCRT.DLL.  Instead, the
+      application's installer is supposed to put these DLLs
+      (if needed) in the application's private directory.
+      If ZLIB1.DLL depends on a non-system runtime, it cannot
+      function as a redistributable system component.
 
-    * Linking ZLIB1.DLL to NTDLL.DLL is not possible.
+    * Linking ZLIB1.DLL to non-Microsoft runtimes, such as
-      NTDLL.DLL exports only a part of the C library, and only on
+      Borland's, or Cygwin's, raises problems related to the
-      Windows NT systems.
+      reliable presence of these runtimes on Win32 systems.
+      It's easier to let the DLL build of zlib up to the people
+      who distribute these runtimes, and who may proceed as
+      explained in the answer to Question 14.
 
 
-13. I need to link my own DLL build to a CRT different than
+13. If ZLIB1.DLL cannot be linked to MSVCR70.DLL or MSVCR71.DLL,
+    how can I build/use ZLIB1.DLL in Microsoft Visual C++ 7.0
+    (Visual Studio .NET) or newer?
+
+  - Due to the problems explained in the Microsoft Knowledge Base
+    article KB326922 (see the previous answer), the C runtime that
+    comes with the VC7 environment is no longer considered a
+    system component.  That is, it should not be assumed that this
+    runtime exists, or may be installed in a system directory.
+    Since ZLIB1.DLL is supposed to be a system component, it may
+    not depend on a non-system component.
+
+    In order to link ZLIB1.DLL and your application to MSVCRT.DLL
+    in VC7, you need the library of Visual C++ 6.0 or older.  If
+    you don't have this library at hand, it's probably best not to
+    use ZLIB1.DLL.
+
+    We are hoping that, in the future, Microsoft will provide a
+    way to build applications linked to a proper system runtime,
+    from the Visual C++ environment.  Until then, you have a
+    couple of alternatives, such as linking zlib in statically.
+    If your application requires dynamic linking, you may proceed
+    as explained in the answer to Question 14.
+
+
+14. I need to link my own DLL build to a CRT different than
     MSVCRT.DLL.  What can I do?
 
   - Feel free to rebuild the DLL from the zlib sources, and link
@@ -333,7 +358,7 @@ in the zlib distribution, or at the following location:
     CYGWIN1.DLL, and it is distributed under the name CYGZ.DLL.
 
 
-14. May I include additional pieces of code that I find useful,
+15. May I include additional pieces of code that I find useful,
     link them in ZLIB1.DLL, and export them?
 
   - No.  A legitimate build of ZLIB1.DLL must not include code
@@ -346,7 +371,7 @@ in the zlib distribution, or at the following location:
     is a redistributable file, named VCLxx.DLL.
 
 
-15. May I remove some functionality out of ZLIB1.DLL, by enabling
+16. May I remove some functionality out of ZLIB1.DLL, by enabling
     macros like NO_GZCOMPRESS or NO_GZIP at compile time?
 
   - No.  A legitimate build of ZLIB1.DLL must provide the complete
@@ -355,7 +380,7 @@ in the zlib distribution, or at the following location:
     different file name, as suggested in the previous answer.
 
 
-16. I made my own ZLIB1.DLL build.  Can I test it for compliance?
+17. I made my own ZLIB1.DLL build.  Can I test it for compliance?
 
   - We prefer that you download the official DLL from the zlib
     web site.  If you need something peculiar from this DLL, you

win32/VisualC.txt

@@ -0,0 +1,3 @@
+
+To build zlib using the Microsoft Visual C++ environment,
+use the appropriate project from the projects/ directory.

win32/zlib1.rc

@@ -5,8 +5,8 @@ VS_VERSION_INFO		VERSIONINFO
 #else
 VS_VERSION_INFO		VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
 #endif
-  FILEVERSION		1,2,1,2
+  FILEVERSION		1,2,2,1
-  PRODUCTVERSION	1,2,1,2
+  PRODUCTVERSION	1,2,2,1
   FILEFLAGSMASK		VS_FFI_FILEFLAGSMASK
 #ifdef _DEBUG
   FILEFLAGS		1
@@ -23,12 +23,12 @@ BEGIN
     //language ID = U.S. English, char set = Windows, Multilingual
     BEGIN
       VALUE "FileDescription",	"zlib data compression library\0"
-      VALUE "FileVersion",	"1.2.1.2\0"
+      VALUE "FileVersion",	"1.2.2.1\0"
       VALUE "InternalName",	"zlib1.dll\0"
       VALUE "LegalCopyright",	"(C) 1995-2004 Jean-loup Gailly & Mark Adler\0"
       VALUE "OriginalFilename",	"zlib1.dll\0"
       VALUE "ProductName",	"zlib\0"
-      VALUE "ProductVersion",	"1.2.1.2\0"
+      VALUE "ProductVersion",	"1.2.2.1\0"
       VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
     END
   END

zconf.h

@@ -43,6 +43,10 @@
 #  define get_crc_table         z_get_crc_table
 #  define zError                z_zError
 
+#  define alloc_func            z_alloc_func
+#  define free_func             z_free_func
+#  define in_func               z_in_func
+#  define out_func              z_out_func
 #  define Byte                  z_Byte
 #  define uInt                  z_uInt
 #  define uLong                 z_uLong

zconf.in.h

@@ -43,6 +43,10 @@
 #  define get_crc_table         z_get_crc_table
 #  define zError                z_zError
 
+#  define alloc_func            z_alloc_func
+#  define free_func             z_free_func
+#  define in_func               z_in_func
+#  define out_func              z_out_func
 #  define Byte                  z_Byte
 #  define uInt                  z_uInt
 #  define uLong                 z_uLong

zlib.3

@@ -1,4 +1,4 @@
-.TH ZLIB 3 "9 September 2004"
+.TH ZLIB 3 "31 October 2004"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -133,7 +133,7 @@ before asking for help.
 Send questions and/or comments to zlib@gzip.org,
 or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
 .SH AUTHORS
-Version 1.2.1.2
+Version 1.2.2.1
 Copyright (C) 1995-2004 Jean-loup Gailly (jloup@gzip.org)
 and Mark Adler (madler@alumni.caltech.edu).
 .LP

zlib.h

@@ -1,5 +1,5 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.2.1.2, September 9th, 2004
+  version 1.2.2.1, October 31st, 2004
 
   Copyright (C) 1995-2004 Jean-loup Gailly and Mark Adler
 
@@ -37,8 +37,8 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.1.2"
+#define ZLIB_VERSION "1.2.2.1"
-#define ZLIB_VERNUM 0x1212
+#define ZLIB_VERNUM 0x1221
 
 /*
      The 'zlib' compression library provides in-memory compression and
@@ -53,24 +53,22 @@ extern "C" {
   application must provide more input and/or consume the output
   (providing more output space) before each call.
 
-     The compressed data format used by the in-memory functions is the zlib
+     The compressed data format used by default by the in-memory functions is
-  format, which is a zlib wrapper documented in RFC 1950, wrapped around a
+  the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
-  deflate stream, which is itself documented in RFC 1951.
+  around a deflate stream, which is itself documented in RFC 1951.
 
      The library also supports reading and writing files in gzip (.gz) format
   with an interface similar to that of stdio using the functions that start
   with "gz".  The gzip format is different from the zlib format.  gzip is a
   gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
 
+     This library can optionally read and write gzip streams in memory as well.
+
      The zlib format was designed to be compact and fast for use in memory
   and on communications channels.  The gzip format was designed for single-
   file compression on file systems, has a larger header than zlib to maintain
   directory information, and uses a different, slower check method than zlib.
 
-     This library does not provide any functions to write gzip files in memory.
-  However such functions could be easily written using zlib's deflate function,
-  the documentation in the gzip RFC, and the examples in gzio.c.
-
      The library does not install any signal handler. The decoder checks
   the consistency of the compressed data, so the library should never
   crash even in case of corrupted input.
@@ -97,13 +95,36 @@ typedef struct z_stream_s {
     free_func  zfree;   /* used to free the internal state */
     voidpf     opaque;  /* private data object passed to zalloc and zfree */
 
-    int     data_type;  /* best guess about the data type: ascii or binary */
+    int     data_type;  /* best guess about the data type: binary or text */
     uLong   adler;      /* adler32 value of the uncompressed data */
     uLong   reserved;   /* reserved for future use */
 } z_stream;
 
 typedef z_stream FAR *z_streamp;
 
+/*
+     gzip header information passed to and from zlib routines.  See RFC 1952
+  for more details on the meanings of these fields.
+*/
+typedef struct gz_header_s {
+    int     text;       /* true if compressed data believed to be text */
+    uLong   time;       /* modification time */
+    int     xflags;     /* extra flags (not used when writing a gzip file) */
+    int     os;         /* operating system */
+    Bytef   *extra;     /* pointer to extra field or Z_NULL if none */
+    uInt    extra_len;  /* extra field length (valid if extra != Z_NULL) */
+    uInt    extra_max;  /* space at extra (only when reading header) */
+    Bytef   *name;      /* pointer to zero-terminated file name or Z_NULL */
+    uInt    name_max;   /* space at name (only when reading header) */
+    Bytef   *comment;   /* pointer to zero-terminated comment or Z_NULL */
+    uInt    comm_max;   /* space at comment (only when reading header) */
+    int     hcrc;       /* true if there was or will be a header crc */
+    int     done;       /* true when done reading gzip header (not used
+                           when writing a gzip file) */
+} gz_header;
+
+typedef gz_header FAR *gz_headerp;
+
 /*
    The application must update next_in and avail_in when avail_in has
    dropped to zero. It must update next_out and avail_out when avail_out
@@ -172,7 +193,8 @@ typedef z_stream FAR *z_streamp;
 /* compression strategy; see deflateInit2() below for details */
 
 #define Z_BINARY   0
-#define Z_ASCII    1
+#define Z_TEXT     1
+#define Z_ASCII    Z_TEXT   /* for compatibility with 1.2.2 and earlier */
 #define Z_UNKNOWN  2
 /* Possible values of the data_type field (though see inflate()) */
 
@@ -246,6 +268,10 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
   and with zero avail_out, it must be called again after making room in the
   output buffer because there might be more output pending.
 
+    Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
+  decide how much data to accumualte before producing output, in order to
+  maximize compression.
+
     If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
   flushed to the output buffer and the output is aligned on a byte boundary, so
   that the decompressor can get all input data available so far. (In particular
@@ -257,7 +283,7 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
   Z_SYNC_FLUSH, and the compression state is reset so that decompression can
   restart from this point if previous compressed data has been damaged or if
   random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
-  the compression.
+  compression.
 
     If deflate returns with avail_out == 0, this function must be called again
   with the same value of the flush parameter and more output space (updated
@@ -282,8 +308,8 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
     deflate() sets strm->adler to the adler32 checksum of all input read
   so far (that is, total_in bytes).
 
-    deflate() may update data_type if it can make a good guess about
+    deflate() may update strm->data_type if it can make a good guess about
-  the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
+  the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
   binary. This field is only for information purposes and does not affect
   the compression algorithm in any manner.
 
@@ -478,7 +504,8 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
    16 to windowBits to write a simple gzip header and trailer around the
    compressed data instead of a zlib wrapper. The gzip header will have no
    file name, no extra data, no comment, no modification time (set to zero),
-   no header crc, and the operating system will be set to 255 (unknown).
+   no header crc, and the operating system will be set to 255 (unknown).  If a
+   gzip stream is being written, strm->adler is a crc32 instead of an adler32.
 
      The memLevel parameter specifies how much memory should be allocated
    for the internal compression state. memLevel=1 uses minimum memory but
@@ -617,6 +644,30 @@ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
    stream state was inconsistent.
 */
 
+ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
+                                         gz_headerp head));
+/*
+      deflateSetHeader() provides gzip header information for when a gzip
+   stream is requested by deflateInit2().  deflateSetHeader() may be called
+   after deflateInit2() or deflateReset() and before the first call of
+   deflate().  The text, time, os, extra field, name, and comment information
+   in the provided gz_header structure are written to the gzip header (xflag is
+   ignored -- the extra flags are set according to the compression level).  The
+   caller must assure that, if not Z_NULL, name and comment are terminated with
+   a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
+   available there.  If hcrc is true, a gzip header crc is included.  Note that
+   the current versions of the command-line version of gzip (up through version
+   1.3.x) do not support header crc's, and will report that it is a "multi-part
+   gzip file" and give up.
+
+      If deflateSetHeader is not used, the default gzip header has text false,
+   the time set to zero, and os set to 255, with no extra, name, or comment
+   fields.  The gzip header is returned to the default state by deflateReset().
+
+      deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
 /*
 ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
                                      int  windowBits));
@@ -649,7 +700,8 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
      windowBits can also be greater than 15 for optional gzip decoding. Add
    32 to windowBits to enable zlib and gzip decoding with automatic header
    detection, or add 16 to decode only the gzip format (the zlib format will
-   return a Z_DATA_ERROR).
+   return a Z_DATA_ERROR.  If a gzip stream is being decoded, strm->adler is
+   a crc32 instead of an adler32.
 
      inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
    memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
@@ -664,11 +716,14 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
                                              uInt  dictLength));
 /*
      Initializes the decompression dictionary from the given uncompressed byte
-   sequence. This function must be called immediately after a call of inflate
+   sequence. This function must be called immediately after a call of inflate,
-   if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
+   if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
-   can be determined from the adler32 value returned by this call of
+   can be determined from the adler32 value returned by that call of inflate.
-   inflate. The compressor and decompressor must use exactly the same
+   The compressor and decompressor must use exactly the same dictionary (see
-   dictionary (see deflateSetDictionary).
+   deflateSetDictionary).  For raw inflate, this function can be called
+   immediately after inflateInit2() or inflateReset() and before any call of
+   inflate() to set the dictionary.  The application must insure that the
+   dictionary that was used for compression is provided.
 
      inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
    parameter is invalid (such as NULL dictionary) or the stream state is
@@ -719,8 +774,48 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
+ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
+                                         gz_headerp head));
 /*
-ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
+      inflateGetHeader() requests that gzip header information be stored in the
+   provided gz_header structure.  inflateGetHeader() may be called after
+   inflateInit2() or inflateReset(), and before the first call of inflate().
+   As inflate() processes the gzip stream, head->done is zero until the header
+   is completed, at which time head->done is set to one.  If a zlib stream is
+   being decoded, then head->done is set to -1 to indicate that there will be
+   no gzip header information forthcoming.  Note that Z_BLOCK can be used to
+   force inflate() to return immediately after header processing is complete
+   and before any actual data is decompressed.
+
+      The text, time, xflags, and os fields are filled in with the gzip header
+   contents.  hcrc is set to true if there is a header CRC.  (The header CRC
+   was valid if done is set to one.)  If extra is not Z_NULL, then extra_max
+   contains the maximum number of bytes to write to extra.  Once done is true,
+   extra_len contains the actual extra field length, and extra contains the
+   extra field, or that field truncated if extra_max is less than extra_len.
+   If name is not Z_NULL, then up to name_max characters are written there,
+   terminated with a zero unless the length is greater than name_max.  If
+   comment is not Z_NULL, then up to comm_max characters are written there,
+   terminated with a zero unless the length is greater than comm_max.  When
+   any of extra, name, or comment are not Z_NULL and the respective field is
+   not present in the header, then that field is set to Z_NULL to signal its
+   absence.  This allows the use of deflateSetHeader() with the returned
+   structure to duplicate the header.  However if those fields are set to
+   allocated memory, then the application will need to save those pointers
+   elsewhere so that they can be eventually freed.
+
+      If inflateGetHeader is not used, then the header information is simply
+   discarded.  The header is always checked for validity, including the header
+   CRC if present.  inflateReset() will reset the process to discard the header
+   information.  The application would need to call inflateGetHeader() again to
+   retrieve the header from the next gzip stream.
+
+      inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent.
+*/
+
+/*
+ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
                                         unsigned char FAR *window));
 
      Initialize the internal stream state for decompression using inflateBack()
@@ -744,7 +839,7 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
 typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
 typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
 
-ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
+ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
                                     in_func in, void FAR *in_desc,
                                     out_func out, void FAR *out_desc));
 /*
@@ -813,7 +908,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
    that inflateBack() cannot return Z_OK.
 */
 
-ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm));
+ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
 /*
      All memory allocated by inflateBackInit() is freed.
 
@@ -1119,7 +1214,6 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
 */
 
 ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
-
 /*
      Update a running Adler-32 checksum with the bytes buf[0..len-1] and
    return the updated checksum. If buf is NULL, this function returns
@@ -1135,12 +1229,21 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
      if (adler != original_adler) error();
 */
 
+ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
+                                          uLong len2));
+/*
+     Combine two Adler-32 checksums into one.  For two sequences of bytes, seq1
+   and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
+   each, adler1 and adler2.  adler32_combine() returns the Adler-32 checksum of
+   seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
+*/
+
 ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
 /*
-     Update a running crc with the bytes buf[0..len-1] and return the updated
+     Update a running CRC-32 with the bytes buf[0..len-1] and return the
-   crc. If buf is NULL, this function returns the required initial value
+   updated CRC-32. If buf is NULL, this function returns the required initial
-   for the crc. Pre- and post-conditioning (one's complement) is performed
+   value for the for the crc. Pre- and post-conditioning (one's complement) is
-   within this function so it shouldn't be done by the application.
+   performed within this function so it shouldn't be done by the application.
    Usage example:
 
      uLong crc = crc32(0L, Z_NULL, 0);
@@ -1151,6 +1254,16 @@ ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
      if (crc != original_crc) error();
 */
 
+ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, uLong len2));
+
+/*
+     Combine two CRC-32 check values into one.  For two sequences of bytes,
+   seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
+   calculated for each, crc1 and crc2.  crc32_combine() returns the CRC-32
+   check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
+   len2.
+*/
+
 
                         /* various hacks, don't look :) */
 
@@ -1167,7 +1280,7 @@ ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
                                       int stream_size));
 ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
                                       const char *version, int stream_size));
-ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
+ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
                                          unsigned char FAR *window,
                                          const char *version,
                                          int stream_size));

zutil.c

@@ -1,5 +1,5 @@
 /* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
@@ -11,10 +11,6 @@
 struct internal_state      {int dummy;}; /* for buggy compilers */
 #endif
 
-#ifndef STDC
-extern void exit OF((int));
-#endif
-
 const char * const z_errmsg[10] = {
 "need dictionary",     /* Z_NEED_DICT       2  */
 "stream end",          /* Z_STREAM_END      1  */

zutil.h

@@ -1,5 +1,5 @@
 /* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * Copyright (C) 1995-2004 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h
  */