60 files changed, 182 insertions, 103 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 71615168..e103c409 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.12...3.31)
 project(
    zlib
    LANGUAGES C
-    VERSION 1.3.1.2
+    VERSION 1.3.2
    HOMEPAGE_URL "https://zlib.net/"
    DESCRIPTION "a general-purpose lossless data-compression library")
diff --git a/ChangeLog b/ChangeLog
index 0571d81b..312753ed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,31 @@
                ChangeLog file for zlib
+Changes in 1.3.2 (17 Feb 2026)
+- Continued rewrite of CMake build [Vollstrecker]
+- Various portability improvements
+- Various github workflow additions and improvements
+- Check for negative lengths in crc32_combine functions
+- Copy only the initialized window contents in inflateCopy
+- Prevent the use of insecure functions without an explicit request
+- Add compressBound_z and deflateBound_z functions for large values
+- Use atomics to build inflate fixed tables once
+- Add definition of ZLIB_INSECURE to build tests with c89 and c94
+- Add --undefined option to ./configure for UBSan checker
+- Copy only the initialized deflate state in deflateCopy
+- Zero inflate state on allocation
+- Remove untgz from contrib
+- Add _z versions of the compress and uncompress functions
+- Vectorize the CRC-32 calculation on the s390x
+- Set bit 11 of the zip header flags in minizip if UTF-8
+- Update OS/400 support
+- Add a test to configure to check for a working compiler
+- Check for invalid NULL pointer inputs to zlib operations
+- Add --mandir to ./configure to specify manual directory
+- Add LICENSE.Info-Zip to contrib/minizip
+- Remove vstudio projects in lieu of cmake-generated projects
+- Replace strcpy() with memcpy() in contrib/minizip
 Changes in 1.3.1.2 (8 Dec 2025)
 - Improve portability to RISC OS
 - Permit compiling contrib/minizip/unzip.c with decryption
diff --git a/LICENSE b/LICENSE
index 61229c39..b7a69d05 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 Copyright notice:
- (C) 1995-2025 Jean-loup Gailly and Mark Adler
+ (C) 1995-2026 Jean-loup Gailly and Mark Adler
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
diff --git a/Makefile.in b/Makefile.in
index d1f0b8ea..bee83edf 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+# Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 # For conditions of distribution and use, see copyright notice in zlib.h
 # To compile and test, type:
@@ -31,7 +31,7 @@ VGFMAFLAG=
 STATICLIB=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.3.1.2
+SHAREDLIBV=libz.so.1.3.2
 SHAREDLIBM=libz.so.1
 LIBS=$(STATICLIB) $(SHAREDLIBV)
diff --git a/README b/README
index 4723b8ef..2b1e6f36 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY
-zlib 1.3.1.2 is a general purpose data compression library.  All the code is
+zlib 1.3.2 is a general purpose data compression library.  All the code is
 thread safe (though see the FAQ for caveats).  The data format used by the zlib
 library is described by RFCs (Request for Comments) 1950 to 1952 at
 https://datatracker.ietf.org/doc/html/rfc1950 (zlib format), rfc1951 (deflate
@@ -31,7 +31,7 @@ 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 at
 https://zlib.net/nelson/ .
-The changes made in version 1.3.1.2 are documented in the file ChangeLog.
+The changes made in version 1.3.2 are documented in the file ChangeLog.
 Unsupported third party contributions are provided in directory contrib/ .
@@ -81,7 +81,7 @@ Acknowledgments:
 Copyright notice:
- (C) 1995-2025 Jean-loup Gailly and Mark Adler
+ (C) 1995-2026 Jean-loup Gailly and Mark Adler
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
diff --git a/compress.c b/compress.c
index 410d6e50..bd74b948 100644
--- a/compress.c
+++ b/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/contrib/delphi/ZLib.pas b/contrib/delphi/ZLib.pas
index b167b69c..cda3b09e 100644
--- a/contrib/delphi/ZLib.pas
+++ b/contrib/delphi/ZLib.pas
@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
  const OutBuf: Pointer; BufSize: Integer);
 const
-  zlib_version = '1.3.1.2';
+  zlib_version = '1.3.2';
 type
  EZlibError = class(Exception);
diff --git a/contrib/dotzlib/DotZLib/UnitTests.cs b/contrib/dotzlib/DotZLib/UnitTests.cs
index 6b532e25..2714a4b4 100644
--- a/contrib/dotzlib/DotZLib/UnitTests.cs
+++ b/contrib/dotzlib/DotZLib/UnitTests.cs
@@ -156,7 +156,7 @@ namespace DotZLibTests
        public void Info_Version()
        {
            Info info = new Info();
-            Assert.AreEqual("1.3.1.2", Info.Version);
+            Assert.AreEqual("1.3.2", Info.Version);
            Assert.AreEqual(32, info.SizeOfUInt);
            Assert.AreEqual(32, info.SizeOfULong);
            Assert.AreEqual(32, info.SizeOfPointer);
diff --git a/contrib/infback9/inftree9.c b/contrib/infback9/inftree9.c
index 0f06e0f4..cb96cf87 100644
--- a/contrib/infback9/inftree9.c
+++ b/contrib/infback9/inftree9.c
@@ -1,5 +1,5 @@
 /* inftree9.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2025 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
@@ -9,7 +9,7 @@
 #define MAXBITS 15
 const char inflate9_copyright[] =
-   " inflate9 1.3.1.2 Copyright 1995-2025 Mark Adler ";
+   " inflate9 1.3.2 Copyright 1995-2026 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
@@ -59,7 +59,7 @@ int inflate_table9(codetype type, unsigned short FAR *lens, unsigned codes,
    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, 64, 204};
+        133, 133, 133, 133, 144, 199, 75};
    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,
diff --git a/contrib/minizip/MiniZip64_info.txt b/contrib/minizip/MiniZip64_info.txt
index 86487d18..7ca3d05b 100644
--- a/contrib/minizip/MiniZip64_info.txt
+++ b/contrib/minizip/MiniZip64_info.txt
@@ -1,4 +1,4 @@
-MiniZip - Copyright (c) 1998-2010 - by Gilles Vollant - version 1.1 64 bits from Mathias Svensson
+MiniZip - Copyright (c) 1998-2026 - by Gilles Vollant - version 1.1 64 bits from Mathias Svensson
 Introduction
 ---------------------
diff --git a/contrib/minizip/configure.ac b/contrib/minizip/configure.ac
index 339d6dc0..b739fa0c 100644
--- a/contrib/minizip/configure.ac
+++ b/contrib/minizip/configure.ac
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
-AC_INIT([minizip], [1.3.1.2], [bugzilla.redhat.com])
+AC_INIT([minizip], [1.3.2], [bugzilla.redhat.com])
 AC_CONFIG_SRCDIR([minizip.c])
 AM_INIT_AUTOMAKE([foreign])
 LT_INIT
diff --git a/contrib/minizip/crypt.h b/contrib/minizip/crypt.h
index d1827c31..dd548938 100644
--- a/contrib/minizip/crypt.h
+++ b/contrib/minizip/crypt.h
@@ -1,9 +1,6 @@
 /* crypt.h -- base code for crypt/uncrypt ZIPfile
+   Copyright (C) 1998-2026 Gilles Vollant
-   Version 1.01e, February 12th, 2005
-   Copyright (C) 1998-2005 Gilles Vollant
   This code is a modified version of crypting code in Infozip distribution
diff --git a/contrib/minizip/ioapi.c b/contrib/minizip/ioapi.c
index 04989887..3ee97516 100644
--- a/contrib/minizip/ioapi.c
+++ b/contrib/minizip/ioapi.c
@@ -1,7 +1,7 @@
 /* ioapi.h -- IO base function header for compress/uncompress .zip
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/minizip/ioapi.h b/contrib/minizip/ioapi.h
index 569857fc..a5211239 100644
--- a/contrib/minizip/ioapi.h
+++ b/contrib/minizip/ioapi.h
@@ -1,7 +1,7 @@
 /* ioapi.h -- IO base function header for compress/uncompress .zip
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/minizip/iowin32.c b/contrib/minizip/iowin32.c
index abd51535..810ab2cc 100644
--- a/contrib/minizip/iowin32.c
+++ b/contrib/minizip/iowin32.c
@@ -1,8 +1,7 @@
 /* iowin32.c -- IO base function header for compress/uncompress .zip
-     Version 1.1, February 14h, 2010
     part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/minizip/iowin32.h b/contrib/minizip/iowin32.h
index 345ac93a..65be6270 100644
--- a/contrib/minizip/iowin32.h
+++ b/contrib/minizip/iowin32.h
@@ -1,8 +1,7 @@
 /* iowin32.h -- IO base function header for compress/uncompress .zip
-     Version 1.1, February 14h, 2010
     part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/minizip/miniunz.c b/contrib/minizip/miniunz.c
index 8aa788f1..cd577ea0 100644
--- a/contrib/minizip/miniunz.c
+++ b/contrib/minizip/miniunz.c
@@ -1,9 +1,8 @@
 /*
   miniunz.c
-   Version 1.1, February 14h, 2010
   sample part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications of Unzip for Zip64
         Copyright (C) 2007-2008 Even Rouault
diff --git a/contrib/minizip/minizip.c b/contrib/minizip/minizip.c
index 46a6d798..f68bea1d 100644
--- a/contrib/minizip/minizip.c
+++ b/contrib/minizip/minizip.c
@@ -1,9 +1,8 @@
 /*
   minizip.c
-   Version 1.1, February 14h, 2010
   sample part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications of Unzip for Zip64
         Copyright (C) 2007-2008 Even Rouault
diff --git a/contrib/minizip/skipset.h b/contrib/minizip/skipset.h
index 9bef1850..ec4d4ab4 100644
--- a/contrib/minizip/skipset.h
+++ b/contrib/minizip/skipset.h
@@ -1,5 +1,5 @@
 /* skipset.h -- set operations using a skiplist
-// Copyright (C) 2024 Mark Adler
+// Copyright (C) 2024-2026 Mark Adler
 // See MiniZip_info.txt for the license.
 // This implements a skiplist set, i.e. just keys, no data, with ~O(log n) time
diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
index 44c51bd3..d7ff21cb 100644
--- a/contrib/minizip/unzip.c
+++ b/contrib/minizip/unzip.c
@@ -1,8 +1,7 @@
 /* unzip.c -- IO for uncompress .zip files using zlib
-   Version 1.1, February 14h, 2010
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications of Unzip for Zip64
         Copyright (C) 2007-2008 Even Rouault
diff --git a/contrib/minizip/unzip.h b/contrib/minizip/unzip.h
index a3f18949..9c98b608 100644
--- a/contrib/minizip/unzip.h
+++ b/contrib/minizip/unzip.h
@@ -1,8 +1,7 @@
 /* unzip.h -- IO for uncompress .zip files using zlib
-   Version 1.1, February 14h, 2010
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications of Unzip for Zip64
         Copyright (C) 2007-2008 Even Rouault
diff --git a/contrib/minizip/zip.c b/contrib/minizip/zip.c
index 0ec6fe1b..31005c51 100644
--- a/contrib/minizip/zip.c
+++ b/contrib/minizip/zip.c
@@ -1,8 +1,7 @@
 /* zip.c -- IO on .zip files using zlib
-   Version 1.1, February 14h, 2010
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/minizip/zip.h b/contrib/minizip/zip.h
index 522c6c74..99624407 100644
--- a/contrib/minizip/zip.h
+++ b/contrib/minizip/zip.h
@@ -1,8 +1,7 @@
 /* zip.h -- IO on .zip files using zlib
-   Version 1.1, February 14h, 2010
   part of the MiniZip project - ( https://www.winimage.com/zLibDll/minizip.html )
-         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
+         Copyright (C) 1998-2026 Gilles Vollant (minizip) ( https://www.winimage.com/zLibDll/minizip.html )
         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( https://result42.com )
diff --git a/contrib/nuget/nuget.csproj b/contrib/nuget/nuget.csproj
index 06391345..ead9a205 100644
--- a/contrib/nuget/nuget.csproj
+++ b/contrib/nuget/nuget.csproj
@@ -6,8 +6,8 @@
    <PackageId Condition="$([MSBuild]::IsOSPlatform('Windows'))">$(PackageId).win</PackageId>
    <PackageId Condition="$([MSBuild]::IsOSPlatform('Linux'))">$(PackageId).linux</PackageId>
    <PackageId Condition="$([MSBuild]::IsOSPlatform('OSX'))">$(PackageId).osx</PackageId>
-    <Copyright>(C) 1995-2025 Jean-loup Gailly and Mark Adler</Copyright>
+    <Copyright>(C) 1995-2026 Jean-loup Gailly and Mark Adler</Copyright>
-    <version>1.3.1.2</version>
+    <version>1.3.2</version>
    <PackageDescription>NuGet Package for consuming native builds of zlib into .NET without complexity.</PackageDescription>
    <PackageReadmeFile>README</PackageReadmeFile>
    <!--
diff --git a/contrib/pascal/zlibpas.pas b/contrib/pascal/zlibpas.pas
index 8715da8c..603ff82e 100644
--- a/contrib/pascal/zlibpas.pas
+++ b/contrib/pascal/zlibpas.pas
@@ -10,7 +10,7 @@ unit zlibpas;
 interface
 const
-  ZLIB_VERSION = '1.3.1.2';
+  ZLIB_VERSION = '1.3.2';
  ZLIB_VERNUM  = $12a0;
 type
diff --git a/contrib/puff/pufftest.c b/contrib/puff/pufftest.c
index 6cad56ff..b022992a 100644
--- a/contrib/puff/pufftest.c
+++ b/contrib/puff/pufftest.c
@@ -1,8 +1,7 @@
 /*
 * pufftest.c
- * Copyright (C) 2002-2013 Mark Adler
+ * Copyright (C) 2002-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in puff.h
- * version 2.3, 21 Jan 2013
 */
 /* Example of how to use puff().
diff --git a/contrib/zlib1-dll/CMakeLists.txt b/contrib/zlib1-dll/CMakeLists.txt
index c9825aa0..86625123 100644
--- a/contrib/zlib1-dll/CMakeLists.txt
+++ b/contrib/zlib1-dll/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.12...3.31)
 project(
    zlib1-dll
    LANGUAGES C
-    VERSION 1.3.1.2
+    VERSION 1.3.2
    HOMEPAGE_URL "https://zlib.net/"
    DESCRIPTION "zlib1.dll is the legacy DLL with zlib and minizip")
diff --git a/crc32.c b/crc32.c
index 97eb5fda..d9ade515 100644
--- a/crc32.c
+++ b/crc32.c
@@ -1,5 +1,5 @@
 /* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2022 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 *
 * This interleaved implementation of a CRC makes use of pipelined multiple
diff --git a/deflate.c b/deflate.c
index 96c48dd4..d7d2c7c1 100644
--- a/deflate.c
+++ b/deflate.c
@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2025 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly and Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
@@ -52,7 +52,7 @@
 #include "deflate.h"
 const char deflate_copyright[] =
-   " deflate 1.3.1.2 Copyright 1995-2025 Jean-loup Gailly and Mark Adler ";
+   " deflate 1.3.2 Copyright 1995-2026 Jean-loup Gailly and 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
diff --git a/deflate.h b/deflate.h
index 15c015e9..0732ba83 100644
--- a/deflate.h
+++ b/deflate.h
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2024 Jean-loup Gailly
+ * Copyright (C) 1995-2026 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/gzguts.h b/gzguts.h
index c3d473ac..266305de 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004-2025 Mark Adler
+ * Copyright (C) 2004-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/gzlib.c b/gzlib.c
index 934688c5..7a37a96c 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -1,5 +1,5 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004-2025 Mark Adler
+ * Copyright (C) 2004-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/gzread.c b/gzread.c
index bbabf522..8b3e369d 100644
--- a/gzread.c
+++ b/gzread.c
@@ -1,5 +1,5 @@
 /* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004-2025 Mark Adler
+ * Copyright (C) 2004-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/gzwrite.c b/gzwrite.c
index 18c820e2..13a3700a 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -1,5 +1,5 @@
 /* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004-2025 Mark Adler
+ * Copyright (C) 2004-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/infback.c b/infback.c
index 8cb7654c..e6443feb 100644
--- a/infback.c
+++ b/infback.c
@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2025 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/inffast.c b/inffast.c
index 818886f6..d1657f3f 100644
--- a/inffast.c
+++ b/inffast.c
@@ -1,5 +1,5 @@
 /* inffast.c -- fast decoding
- * Copyright (C) 1995-2025 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/inflate.c b/inflate.c
index 91c01f99..5f5d4922 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2025 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/inftrees.c b/inftrees.c
index 8dc0d088..dcbc64e0 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2025 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
@@ -23,7 +23,7 @@
 #define MAXBITS 15
 const char inflate_copyright[] =
-   " inflate 1.3.1.2 Copyright 1995-2025 Mark Adler ";
+   " inflate 1.3.2 Copyright 1995-2026 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
@@ -71,7 +71,7 @@ int ZLIB_INTERNAL inflate_table(codetype type, unsigned short FAR *lens,
        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, 64, 204};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 75};
    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,
diff --git a/inftrees.h b/inftrees.h
index 00ec96ec..84d05369 100644
--- a/inftrees.h
+++ b/inftrees.h
@@ -1,5 +1,5 @@
 /* inftrees.h -- header to use inftrees.c
- * Copyright (C) 1995-2005, 2010 Mark Adler
+ * Copyright (C) 1995-2026 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/os400/README400 b/os400/README400
index 2cfe7a3c..9314a687 100644
--- a/os400/README400
+++ b/os400/README400
@@ -1,4 +1,4 @@
-        ZLIB version 1.3.1.2 for OS/400 installation instructions
+        ZLIB version 1.3.2 for OS/400 installation instructions
 1) Download and unpack the zlib tarball to some IFS directory.
   (i.e.: /path/to/the/zlib/ifs/source/directory)
diff --git a/os400/make.sh b/os400/make.sh
index e9643f52..43915796 100644
--- a/os400/make.sh
+++ b/os400/make.sh
@@ -276,7 +276,7 @@ fi
 echo '#pragma comment(user, "ZLIB version '"${VERSION}"'")' > os400.c
 echo '#pragma comment(user, __DATE__)' >> os400.c
 echo '#pragma comment(user, __TIME__)' >> os400.c
-echo '#pragma comment(copyright, "Copyright (C) 1995-2017 Jean-Loup Gailly, Mark Adler. OS/400 version by P. Monnerat.")' >> os400.c
+echo '#pragma comment(copyright, "Copyright (C) 1995-2026 Jean-Loup Gailly, Mark Adler. OS/400 version by P. Monnerat.")' >> os400.c
 make_module     OS400           os400.c
 LINK=                           # No need to rebuild service program yet.
 MODULES=
diff --git a/os400/zlibfixed.rpgle b/os400/zlibfixed.rpgle
index b2e3e093..75060f30 100644
--- a/os400/zlibfixed.rpgle
+++ b/os400/zlibfixed.rpgle
@@ -1,7 +1,7 @@
      *  ZLIB.INC - Interface to the general purpose compression library
      *
      *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-      *  Version 1.3.1.2
+      *  Version 1.3.2
      *
      *
      *  WARNING:
@@ -22,14 +22,14 @@
      *
      *  Versioning information.
      *
-     D ZLIB_VERSION    C                   '1.3.1.2'
+     D ZLIB_VERSION    C                   '1.3.2'
-     D ZLIB_VERNUM     C                   X'12a0'
+     D ZLIB_VERNUM     C                   X'1320'
     D ZLIB_VER_MAJOR  C                   1
     D ZLIB_VER_MINOR  C                   3
     D ZLIB_VER_REVISION...
-     D                 C                   1
-     D ZLIB_VER_SUBREVISION...
     D                 C                   2
+     D ZLIB_VER_SUBREVISION...
+     D                 C                   0
      *
      *  Other equates.
      *
@@ -535,6 +535,20 @@
     D  buf                       65535    const options(*varsize)              Bytes to accumulate
     D  len                          20U 0 value                                Buffer length
      *
+     D crc32_combine_gen...
+     D                 PR            10U 0 extproc('crc32_combine_gen')         Operator
+     D  len2                         20U 0 value                                Buffer length
+      *
+     D crc32_combine_gen64...
+     D                 PR            10U 0 extproc('crc32_combine_gen64')       Operator
+     D  len2                         20U 0 value                                Buffer length
+      *
+     D crc32_combine_op...
+     D                 PR            10U 0 extproc('crc32_combine_op')          New Checksum
+     D  crc1                         10U 0 value                                Old checksum
+     D  crc2                         10U 0 value                                Old checksum
+     D  op                           10U 0 value                                Operator
+      *
      **************************************************************************
      *                     Miscellaneous function prototypes
      **************************************************************************
diff --git a/os400/zlibfree.rpgle b/os400/zlibfree.rpgle
index 5ae31baf..b35c4680 100644
--- a/os400/zlibfree.rpgle
+++ b/os400/zlibfree.rpgle
@@ -2,7 +2,7 @@
 //  ZLIB.INC - Interface to the general purpose compression library
 //  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-//  Version 1.3.1.1
+//  Version 1.3.2
 //  WARNING:
@@ -23,12 +23,12 @@
 //  Versioning information.
-Dcl-C ZLIB_VERSION '1.3.1.1';
+Dcl-C ZLIB_VERSION '1.3.2';
-Dcl-C ZLIB_VERNUM X'12A0';
+Dcl-C ZLIB_VERNUM X'1320';
 Dcl-C ZLIB_VER_MAJOR 1;
 Dcl-C ZLIB_VER_MINOR 3;
-Dcl-C ZLIB_VER_REVISION 1;
+Dcl-C ZLIB_VER_REVISION 2;
-Dcl-C ZLIB_VER_SUBREVISION 1;
+Dcl-C ZLIB_VER_SUBREVISION 0;
 //  Other equates.
@@ -113,6 +113,13 @@ Dcl-Pr compress Int(10) Extproc('compress');
    sourceLen Uns(10) Value; // Source length
 End-Pr;
+Dcl-Pr compress_z Int(10) Extproc('compress_z');
+    dest Char(65535) Options(*VARSIZE); // Destination buffer
+    destLen Uns(20); // Destination length
+    source Char(65535) Const Options(*VARSIZE); // Source buffer
+    sourceLen Uns(20) Value; // Source length
+End-Pr;
 Dcl-Pr compress2 Int(10) Extproc('compress2');
    dest Char(65535) Options(*VARSIZE); // Destination buffer
    destLen Uns(10); // Destination length
@@ -121,10 +128,22 @@ Dcl-Pr compress2 Int(10) Extproc('compress2');
    level Int(10) Value; // Compression level
 End-Pr;
+Dcl-Pr compress2_z Int(10) Extproc('compress2_z');
+    dest Char(65535) Options(*VARSIZE); // Destination buffer
+    destLen Uns(20); // Destination length
+    source Char(65535) Const Options(*VARSIZE); // Source buffer
+    sourceLen Uns(20) Value; // Source length
+    level Int(10) Value; // Compression level
+End-Pr;
 Dcl-Pr compressBound Uns(10) Extproc('compressBound');
    sourceLen Uns(10) Value;
 End-Pr;
+Dcl-Pr compressBound_z Uns(10) Extproc('compressBound_z');
+    sourceLen Uns(20) Value;
+End-Pr;
 Dcl-Pr uncompress Int(10) Extproc('uncompress');
    dest Char(65535) Options(*VARSIZE); // Destination buffer
    destLen Uns(10); // Destination length
@@ -132,6 +151,13 @@ Dcl-Pr uncompress Int(10) Extproc('uncompress');
    sourceLen Uns(10) Value; // Source length
 End-Pr;
+Dcl-Pr uncompress_z Int(10) Extproc('uncompress_z');
+    dest Char(65535) Options(*VARSIZE); // Destination buffer
+    destLen Uns(20); // Destination length
+    source Char(65535) Const Options(*VARSIZE); // Source buffer
+    sourceLen Uns(20) Value; // Source length
+End-Pr;
 Dcl-Pr uncompress2 Int(10) Extproc('uncompress2');
    dest Char(65535) Options(*VARSIZE); // Destination buffer
    destLen Uns(10); // Destination length
@@ -139,6 +165,13 @@ Dcl-Pr uncompress2 Int(10) Extproc('uncompress2');
    sourceLen Uns(10); // Source length
 End-Pr;
+Dcl-Pr uncompress2_z Int(10) Extproc('uncompress2_z');
+    dest Char(65535) Options(*VARSIZE); // Destination buffer
+    destLen Uns(20); // Destination length
+    source Char(65535) Const Options(*VARSIZE); // Source buffer
+    sourceLen Uns(20); // Source length
+End-Pr;
 /if not defined(LARGE_FILES)
    Dcl-Pr gzopen Extproc('gzopen') Like(gzFile);
            path Pointer Value Options(*STRING); // File pathname
@@ -397,7 +430,12 @@ End-Pr;
 Dcl-Pr deflateBound Uns(10) Extproc('deflateBound'); // Change level & strat
    strm Like(z_stream); // Compression stream
-    sourcelen Uns(10) Value; // Compression level
+    sourcelen Uns(10) Value; // Source length
+End-Pr;
+Dcl-Pr deflateBound_z Uns(10) Extproc('deflateBound_z'); // Change level & strat
+    strm Like(z_stream); // Compression stream
+    sourcelen Uns(20) Value; // Source length
 End-Pr;
 Dcl-Pr deflatePending Int(10) Extproc('deflatePending'); // Change level & strat
@@ -542,7 +580,7 @@ End-Pr;
 Dcl-Pr crc32_combine Uns(10) Extproc('crc32_combine'); // New checksum
    crc1 Uns(10) Value; // Old checksum
    crc2 Uns(10) Value; // Old checksum
-    len2 Uns(20) Value; // Buffer length
+    len2 Uns(20) Value; // 2nd Buffer length
 End-Pr;
 Dcl-Pr crc32_z Uns(10) Extproc('crc32_z'); // New checksum
@@ -551,6 +589,20 @@ Dcl-Pr crc32_z Uns(10) Extproc('crc32_z'); // New checksum
    len Uns(20) Value; // Buffer length
 End-Pr;
+Dcl-Pr crc32_combine_gen Uns(10) Extproc('crc32_combine_gen');
+    len Uns(20) Value; // 2nd Buffer length
+End-Pr;
+Dcl-Pr crc32_combine_gen64 Uns(10) Extproc('crc32_combine_gen64');
+    len Uns(20) Value; // 2nd Buffer length
+End-Pr;
+Dcl-Pr crc32_combine_op Uns(10) Extproc('crc32_combine_op'); // New checksum
+    crc1 Uns(10) Value; // Old checksum
+    crc2 Uns(10) Value; // Old checksum
+    op Uns(10) Value; // Operator
+End-Pr;
 //*************************************************************************
 //                     Miscellaneous function prototypes
 //*************************************************************************
diff --git a/qnx/package.qpg b/qnx/package.qpg
index b86609ab..82d65f4b 100644
--- a/qnx/package.qpg
+++ b/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.1.3.1.2" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="../libz.so.1.3.2" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.3.1.2"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.3.2"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.3.1.2"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.3.2"/>
-         <QPG:Add file="../libz.so.1.3.1.2" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.3.2" install="/opt/lib/" component="slib"/>
      </QPG:Files>
      <QPG:PackageFilter>
@@ -63,7 +63,7 @@
            </QPM:ProductDescription>
            <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.3.1.2</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.3.2</QPM:ReleaseVersion>
               <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
               <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
               <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
diff --git a/test/example.c b/test/example.c
index f517bb66..9cc5f763 100644
--- a/test/example.c
+++ b/test/example.c
@@ -1,5 +1,5 @@
 /* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2006, 2011, 2016 Jean-loup Gailly
+ * Copyright (C) 1995-2026 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/test/minigzip.c b/test/minigzip.c
index fb0ef161..40da8736 100644
--- a/test/minigzip.c
+++ b/test/minigzip.c
@@ -1,5 +1,5 @@
 /* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2006, 2010, 2011, 2016 Jean-loup Gailly
+ * Copyright (C) 1995-2026 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/treebuild.xml b/treebuild.xml
index 3624680b..cd7d7a58 100644
--- a/treebuild.xml
+++ b/treebuild.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" ?>
-<package name="zlib" version="1.3.1.2">
+<package name="zlib" version="1.3.2">
-    <library name="zlib" dlversion="1.3.1.2" dlname="z">
+    <library name="zlib" dlversion="1.3.2" dlname="z">
        <property name="description"> zip compression library </property>
        <property name="include-target-dir" value="$(@PACKAGE/install-includedir)" />
diff --git a/trees.c b/trees.c
index e5524367..8e4da01e 100644
--- a/trees.c
+++ b/trees.c
@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2024 Jean-loup Gailly
+ * Copyright (C) 1995-2026 Jean-loup Gailly
 * detect_data_type() function provided freely by Cosmin Truta, 2006
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/uncompr.c b/uncompr.c
index 14ef96ce..2195e785 100644
--- a/uncompr.c
+++ b/uncompr.c
@@ -1,5 +1,5 @@
 /* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/win32/Makefile.gcc b/win32/Makefile.gcc
index 2fc69324..d1cdb9a1 100644
--- a/win32/Makefile.gcc
+++ b/win32/Makefile.gcc
@@ -4,7 +4,7 @@
 # Last updated: Mar 2012.
 # Tested under Cygwin and MinGW.
-# Copyright (C) 1995-2003 Jean-loup Gailly.
+# Copyright (C) 1995-2026 Jean-loup Gailly.
 # For conditions of distribution and use, see copyright notice in zlib.h
 # To compile, or to compile and test, type from the top level zlib directory:
diff --git a/win32/README-WIN32.txt b/win32/README-WIN32.txt
index 79d2822e..48c9120a 100644
--- a/win32/README-WIN32.txt
+++ b/win32/README-WIN32.txt
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY
-zlib 1.3.1.2 is a general purpose data compression library.  All the code is
+zlib 1.3.2 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
 https://datatracker.ietf.org/doc/html/rfc1951 (zlib format), rfc1951.txt
@@ -22,7 +22,7 @@ asking for help.
 Manifest:
-The package zlib-1.3.1.2-win32-x86.zip will contain the following files:
+The package zlib-1.3.2-win32-x86.zip will contain the following files:
  README-WIN32.txt This document
  ChangeLog        Changes since previous zlib packages
@@ -72,7 +72,7 @@ are too numerous to cite here.
 Copyright notice:
-  (C) 1995-2017 Jean-loup Gailly and Mark Adler
+  (C) 1995-2026 Jean-loup Gailly and Mark Adler
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
diff --git a/win32/zlib1.rc b/win32/zlib1.rc
index 66e5b51e..e86ce568 100644
--- a/win32/zlib1.rc
+++ b/win32/zlib1.rc
@@ -23,7 +23,7 @@ BEGIN
      VALUE "FileDescription",  "zlib data compression library\0"
      VALUE "FileVersion",      ZLIB_VERSION "\0"
      VALUE "InternalName",     "zlib1.dll\0"
-      VALUE "LegalCopyright",   "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright",   "(C) 1995-2026 Jean-loup Gailly & Mark Adler\0"
      VALUE "OriginalFilename", "zlib1.dll\0"
      VALUE "ProductName",      "zlib\0"
      VALUE "ProductVersion",   ZLIB_VERSION "\0"
diff --git a/zconf.h b/zconf.h
index a7143810..828ca617 100644
--- a/zconf.h
+++ b/zconf.h
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2025 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/zconf.h.in b/zconf.h.in
index a7143810..828ca617 100644
--- a/zconf.h.in
+++ b/zconf.h.in
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2025 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/zlib.3 b/zlib.3
index 5dc8b7cb..70d5f180 100644
--- a/zlib.3
+++ b/zlib.3
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "8 Dec 2025"
+.TH ZLIB 3 "17 Feb 2026"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -105,9 +105,9 @@ 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 AND LICENSE
-Version 1.3.1.2
+Version 1.3.2
 .LP
-Copyright (C) 1995-2025 Jean-loup Gailly and Mark Adler
+Copyright (C) 1995-2026 Jean-loup Gailly and Mark Adler
 .LP
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
diff --git a/zlib.3.pdf b/zlib.3.pdf
index c4bb1175..0ec7c6ab 100644
--- a/zlib.3.pdf
+++ b/zlib.3.pdf
Binary files differ
diff --git a/zlib.h b/zlib.h
index 8ffc8de8..a57d3361 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,7 +1,7 @@
 /* zlib.h -- interface of the 'zlib' general purpose compression library
-  version 1.3.1.2, December 8th, 2025
+  version 1.3.2, February 17th, 2026
-  Copyright (C) 1995-2025 Jean-loup Gailly and Mark Adler
+  Copyright (C) 1995-2026 Jean-loup Gailly and Mark Adler
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
@@ -41,12 +41,12 @@
 extern "C" {
 #endif
-#define ZLIB_VERSION "1.3.1.2-audit"
+#define ZLIB_VERSION "1.3.2"
-#define ZLIB_VERNUM 0x1312
+#define ZLIB_VERNUM 0x1320
 #define ZLIB_VER_MAJOR 1
 #define ZLIB_VER_MINOR 3
-#define ZLIB_VER_REVISION 1
+#define ZLIB_VER_REVISION 2
-#define ZLIB_VER_SUBREVISION 2
+#define ZLIB_VER_SUBREVISION 0
 /*
    The 'zlib' compression library provides in-memory compression and
diff --git a/zlib.map b/zlib.map
index 6c4c0311..7a9100f0 100644
--- a/zlib.map
+++ b/zlib.map
@@ -113,4 +113,4 @@ ZLIB_1.3.2 {
        uncompress2_z;
  local:
    inflate_fixed;
-} ZLIB_1.3.1.2;
-\ No newline at end of file
+} ZLIB_1.3.1.2;
diff --git a/zutil.c b/zutil.c
index 860faddc..4ea02a9c 100644
--- a/zutil.c
+++ b/zutil.c
@@ -1,5 +1,5 @@
 /* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2017 Jean-loup Gailly
+ * Copyright (C) 1995-2026 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */
diff --git a/zutil.h b/zutil.h
index 80f6d85b..a9bc23ca 100644
--- a/zutil.h
+++ b/zutil.h
@@ -1,5 +1,5 @@
 /* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2026 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */