Merge 9.0

Merge 8.7
Adapt tclZipfs.c to zlib 1.2.12 (due to the changes in crc32 handling)
2022-04-12 15:28:49 +00:00 · 2022-04-12 14:45:20 +00:00 · 2022-04-12 14:34:59 +00:00 · 2022-04-12 13:53:03 +00:00 · 2022-04-12 13:32:35 +00:00 · 2022-04-12 13:16:46 +00:00
610 changed files with 52223 additions and 34520 deletions
@@ -1,9 +1,12 @@
 compat/zlib/contrib/dotzlib/DotZLib/UnitTests.cs
 compat/zlib/contrib/vstudio/readme.txt
 compat/zlib/contrib/vstudio/*/zlib.rc
+compat/zlib/contrib/vstudio/*/zlibvc.def
 compat/zlib/contrib/vstudio/*/*.sln
+compat/zlib/win32/zlib.def
 compat/zlib/win32/*.txt
 compat/zlib/win64/*.txt
+compat/zlib/zlib.map
 libtommath/*.dsp
 libtommath/*.sln
 libtommath/*.vcproj
@@ -1,3 +1,3 @@
 Important Note
 ==========
-Please do not file issues with Tcl on Github. They are unlikely to be noticed in a timely fashion. Tcl issues are hosted in the [tcl fossil repository on core.tcl.tk](https://core.tcl.tk/tcl/tktnew); please post them there.
+Please do not file issues with Tcl on Github. They are unlikely to be noticed in a timely fashion. Tcl issues are hosted in the [tcl fossil repository on core.tcl-lang.org](https://core.tcl-lang.org/tcl/tktnew); please post them there.
@@ -1,3 +1,3 @@
 Important Note
 ==========
-Please do not file pull requests with Tcl on Github. They are unlikely to be noticed in a timely fashion. Tcl issues (including patches) are hosted in the [tcl fossil repository on core.tcl.tk](https://core.tcl.tk/tcl/tktnew); please post them there.
+Please do not file pull requests with Tcl on Github. They are unlikely to be noticed in a timely fashion. Tcl issues (including patches) are hosted in the [tcl fossil repository on core.tcl-lang.org](https://core.tcl-lang.org/tcl/tktnew); please post them there.
@@ -7,11 +7,12 @@ jobs:
      matrix:
        cfgopt:
          - ""
-          - "CFLAGS=-DTCL_UTF_MAX=4"
+          - "CFLAGS=-DTCL_UTF_MAX=3"
          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
+          - "--enable-symbols=all"
    defaults:
      run:
        shell: bash
@@ -2,7 +2,7 @@ name: macOS
 on: [push]
 jobs:
  xcode:
-    runs-on: macos-11.0
+    runs-on: macos-11
    defaults:
      run:
        shell: bash
@@ -24,7 +24,7 @@ jobs:
          ERROR_ON_FAILURES: 1
          MAC_CI: 1
  clang:
-    runs-on: macos-11.0
+    runs-on: macos-11
    strategy:
      matrix:
        cfgopt:
@@ -32,6 +32,7 @@ jobs:
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
+          - "--enable-symbols=all"
    defaults:
      run:
        shell: bash
@@ -3,7 +3,7 @@ on: [push]
 jobs:
  linux:
    name: Linux
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
    defaults:
      run:
        shell: bash
@@ -27,18 +27,18 @@ jobs:
        working-directory: unix
      - name: Package
        run: |
-          cp ../unix/tclsh tclsh${TCL_PATCHLEVEL}_unofficial
-          chmod +x tclsh${TCL_PATCHLEVEL}_unofficial
-          tar -cf tclsh${TCL_PATCHLEVEL}_unofficial.tar tclsh${TCL_PATCHLEVEL}_unofficial
+          cp ../unix/tclsh tclsh${TCL_PATCHLEVEL}_snapshot
+          chmod +x tclsh${TCL_PATCHLEVEL}_snapshot
+          tar -cf tclsh${TCL_PATCHLEVEL}_snapshot.tar tclsh${TCL_PATCHLEVEL}_snapshot
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
-          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Linux single-file build (unofficial)
+          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Linux single-file build (snapshot)
          path: 1dist/*.tar
  macos:
    name: macOS
-    runs-on: macos-11.0
+    runs-on: macos-11
    defaults:
      run:
        shell: bash
@@ -74,8 +74,8 @@ jobs:
      - name: Package
        run: |
          mkdir contents
-          cp $TCL_BIN contents/tclsh${TCL_PATCHLEVEL}_unofficial
-          chmod +x contents/tclsh${TCL_PATCHLEVEL}_unofficial
+          cp $TCL_BIN contents/tclsh${TCL_PATCHLEVEL}_snapshot
+          chmod +x contents/tclsh${TCL_PATCHLEVEL}_snapshot
          cat > contents/README.txt <<EOF
          This is a single-file executable developer preview of Tcl $TCL_PATCHLEVEL

@@ -83,32 +83,38 @@ jobs:
          Use strictly at your own risk.

          To run it, you need to copy the executable out and run:
-              xattr -d com.apple.quarantine tclsh${TCL_PATCHLEVEL}_unofficial
+              xattr -d com.apple.quarantine tclsh${TCL_PATCHLEVEL}_snapshot
          to mark the executable as runnable on your machine.
          EOF
          $CREATE_DMG \
-              --volname "Tcl $TCL_PATCHLEVEL (unofficial)" \
+              --volname "Tcl $TCL_PATCHLEVEL (snapshot)" \
              --window-pos 200 120 \
              --window-size 800 400 \
-              "Tcl-$TCL_PATCHLEVEL-(unofficial).dmg" \
+              "Tcl-$TCL_PATCHLEVEL-(snapshot).dmg" \
              "contents/"
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
-          name: Tclsh ${{ env.TCL_PATCHLEVEL }} macOS single-file build (unofficial)
+          name: Tclsh ${{ env.TCL_PATCHLEVEL }} macOS single-file build (snapshot)
          path: 1dist/*.dmg
  win:
    name: Windows
-    runs-on: windows-latest
+    runs-on: windows-2019
    defaults:
      run:
-        shell: bash
+        shell: msys2 {0}
+    env:
+      CC: gcc
+      CFGOPT: --disable-symbols --disable-shared
    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
      - name: Install MSYS2
        uses: msys2/setup-msys2@v2
+        with:
+          msystem: UCRT64
+          install: git mingw-w64-ucrt-x86_64-toolchain make zip
+      - name: Checkout
+        uses: actions/checkout@v2
      - name: Prepare
        run: |
          touch generic/tclStubInit.c generic/tclOOStubInit.c
@@ -116,7 +122,7 @@ jobs:
          mkdir 1dist
        working-directory: .
      - name: Configure
-        run: ./configure --disable-symbols --disable-shared --enable-zipfs
+        run: ./configure $CFGOPT
        working-directory: win
      - name: Build
        run: |
@@ -129,10 +135,10 @@ jobs:
        working-directory: win
      - name: Set Executable Name
        run: |
-          cp ../win/tclsh*.exe tclsh${TCL_PATCHLEVEL}_unofficial.exe
+          cp ../win/tclsh*.exe tclsh${TCL_PATCHLEVEL}_snapshot.exe
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
-          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Windows single-file build (unofficial)
-          path: '1dist/*_unofficial.exe'
+          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Windows single-file build (snapshot)
+          path: '1dist/*_snapshot.exe'
@@ -1,8 +1,10 @@
 name: Windows
 on: [push]
+env:
+  ERROR_ON_FAILURES: 1
 jobs:
  msvc:
-    runs-on: windows-latest
+    runs-on: windows-2022
    defaults:
      run:
        shell: powershell
@@ -11,11 +13,11 @@ jobs:
      matrix:
        cfgopt:
          - ""
-          - "OPTS=utfmax"
+          - "OPTS=utf16"
          - "CHECKS=nodep"
          - "OPTS=static"
          - "OPTS=symbols"
-          - "OPTS=memdbg"
+          - "OPTS=symbols STATS=compdbg,memdbg"
    # Using powershell means we need to explicitly stop on failure
    steps:
      - name: Checkout
@@ -40,30 +42,31 @@ jobs:
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
-        env:
-          ERROR_ON_FAILURES: 1
-          CI_BUILD_WITH_MSVC: 1
  gcc:
-    runs-on: windows-latest
+    runs-on: windows-2022
    defaults:
      run:
-        shell: bash
+        shell: msys2 {0}
        working-directory: win
    strategy:
      matrix:
        cfgopt:
          - ""
-          - "CFLAGS=-DTCL_UTF_MAX=4"
+          - "CFLAGS=-DTCL_UTF_MAX=3"
          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
+          - "--enable-symbols=all"
    # Using powershell means we need to explicitly stop on failure
    steps:
+      - name: Install MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: MINGW64
+          install: git mingw-w64-x86_64-toolchain make
      - name: Checkout
        uses: actions/checkout@v2
-      - name: Install MSYS2 and Make
-        run: choco install msys2 make
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
@@ -80,8 +83,6 @@ jobs:
        run: make tcltest
      - name: Run Tests
        run: make test
-        env:
-          ERROR_ON_FAILURES: 1

 # If you add builds with Wine, be sure to define the environment variable
 # CI_USING_WINE when running them so that broken tests know not to run.
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <projectDescription>
-	<name>tcl8</name>
+	<name>tcl9</name>
 	<comment></comment>
 	<projects>
 	</projects>
@@ -20,13 +20,13 @@ jobs:
      compiler: gcc
      env:
        - BUILD_DIR=unix
-    - name: "Linux/GCC/Shared: UTF_MAX=4"
+    - name: "Linux/GCC/Shared: UTF_MAX=3"
      os: linux
      dist: focal
      compiler: gcc
      env:
        - BUILD_DIR=unix
-        - CFGOPT=CFLAGS=-DTCL_UTF_MAX=4
+        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=3"
    - name: "Linux/GCC/Shared: NO_DEPRECATED"
      os: linux
      dist: focal
@@ -83,13 +83,6 @@ jobs:
      compiler: clang
      env:
        - BUILD_DIR=unix
-    - name: "Linux/Clang/Shared:NO_DEPRECATED"
-      os: linux
-      dist: xenial
-      compiler: clang
-      env:
-        - BUILD_DIR=unix
-        - CFGOPT="CFLAGS=-DTCL_NO_DEPRECATED=1"
    - name: "Linux/Clang/Static"
      os: linux
      dist: focal
@@ -215,15 +208,6 @@ jobs:
      script:
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake '-f' makefile.vc all tcltest
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake '-f' makefile.vc test
-    - name: "Windows/MSVC/Shared: UTF_MAX=4"
-      os: windows
-      compiler: cl
-      env: *vcenv
-      before_install: *vcpreinst
-      install: []
-      script:
-        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc all tcltest
-        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc test
    - name: "Windows/MSVC/Shared: NO_DEPRECATED"
      os: windows
      compiler: cl
@@ -270,15 +254,6 @@ jobs:
      script:
        - cmd.exe //C vcvarsall.bat x86 '&&' nmake '-f' makefile.vc all tcltest
        - cmd.exe //C vcvarsall.bat x86 '&&' nmake '-f' makefile.vc test
-    - name: "Windows/MSVC-x86/Shared: UTF_MAX=4"
-      os: windows
-      compiler: cl
-      env: *vcenv
-      before_install: *vcpreinst
-      install: []
-      script:
-        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc all tcltest
-        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=utfmax' '-f' makefile.vc test
    - name: "Windows/MSVC-x86/Shared: NO_DEPRECATED"
      os: windows
      compiler: cl
@@ -326,12 +301,12 @@ jobs:
        - touch generic/tclStubInit.c generic/tclOOStubInit.c generic/tclOOScript.h
        - choco install -y make zip
        - cd ${BUILD_DIR}
-    - name: "Windows/GCC/Shared: UTF_MAX=4"
+    - name: "Windows/GCC/Shared: UTF_MAX=3"
      os: windows
      compiler: gcc
      env:
        - BUILD_DIR=win
-        - CFGOPT="--enable-64bit CFLAGS=-DTCL_UTF_MAX=4"
+        - CFGOPT="--enable-64bit CFLAGS=-DTCL_UTF_MAX=3"
      before_install: *makepreinst
    - name: "Windows/GCC/Shared: NO_DEPRECATED"
      os: windows
@@ -368,12 +343,12 @@ jobs:
      env:
        - BUILD_DIR=win
      before_install: *makepreinst
-    - name: "Windows/GCC-x86/Shared: UTF_MAX=4"
+    - name: "Windows/GCC-x86/Shared: UTF_MAX=3"
      os: windows
      compiler: gcc
      env:
        - BUILD_DIR=win
-        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=4"
+        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=3"
      before_install: *makepreinst
    - name: "Windows/GCC-x86/Shared: NO_DEPRECATED"
      os: windows
@@ -8096,7 +8096,7 @@ a better first place to look now.
 2009-03-25  Jan Nijtmans  <nijtmans@users.sf.net>

 	* doc/tclsh.1:		 Bring doc and tools in line with
-	* tools/installData.tcl: http://wiki.tcl.tk/812
+	* tools/installData.tcl: https://wiki.tcl-lang.org/page/exec+magic
 	* tools/str2c
 	* tools/tcltk-man2html.tcl

@@ -345,7 +345,7 @@
 	* library/clock.tcl: Corrected the regular expressions that match a
 	time zone to allow for time zones specified as +HH or -HH.
 	* tests/clock.test: Added regression test case for the above issue.
-	Thanks to Rolf Ade for reporting this issue [http://wiki.tcl.tk/13094]
+	Thanks to Rolf Ade for reporting this issue [https://wiki.tcl-lang.org/page/Parsing+ISO8601+dates+and+times]
 	* win/tclWinDde.c (Tcl_DdeObjCmd): Corrected a typo that caused a
 	compilation failure on VC++.

@@ -5262,7 +5262,7 @@
 	* generic/tclStrToD.c: Added code to support the "middle endian"
 	floating point format used in the Nokia N770's software-based floating
 	point. Thanks to Bruce Johnson for reporting this bug, originally on
-	http://wiki.tcl.tk/15408.
+	https://wiki.tcl-lang.org/page/Nokia+770.
 	* library/clock.tcl: Fixed a bug with Daylight Saving Time and Posix
 	time zone specifiers reported by Martin Lemburg in
 	http://groups.google.com/group/comp.lang.tcl/browse_thread/thread/9a8b15a4dfc0b7a0
@@ -1,13 +1,24 @@
 # README:  Tcl

-This is the **Tcl 8.7a4** source distribution.
+This is the **Tcl 9.0a4** source distribution.

 You can get any source release of Tcl from [our distribution
 site](https://sourceforge.net/projects/tcl/files/Tcl/).

+8.6 (production release, daily build)
+[![Build Status](https://github.com/tcltk/tcl/workflows/Linux/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Linux%22+branch%3Acore-8-6-branch)
+[![Build Status](https://github.com/tcltk/tcl/workflows/Windows/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Windows%22+branch%3Acore-8-6-branch)
+[![Build Status](https://github.com/tcltk/tcl/workflows/macOS/badge.svg?branch=core-8-6-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22macOS%22+branch%3Acore-8-6-branch)
+<br>
+8.7 (in development, daily build))
 [![Build Status](https://github.com/tcltk/tcl/workflows/Linux/badge.svg?branch=core-8-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Linux%22+branch%3Acore-8-branch)
 [![Build Status](https://github.com/tcltk/tcl/workflows/Windows/badge.svg?branch=core-8-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Windows%22+branch%3Acore-8-branch)
 [![Build Status](https://github.com/tcltk/tcl/workflows/macOS/badge.svg?branch=core-8-branch)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22macOS%22+branch%3Acore-8-branch)
+<br>
+9.0 (in development, daily build))
+[![Build Status](https://github.com/tcltk/tcl/workflows/Linux/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Linux%22+branch%3Amain)
+[![Build Status](https://github.com/tcltk/tcl/workflows/Windows/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22Windows%22+branch%3Amain)
+[![Build Status](https://github.com/tcltk/tcl/workflows/macOS/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions?query=workflow%3A%22macOS%22+branch%3Amain)

 ## Contents
 1. [Introduction](#intro)
@@ -45,7 +56,7 @@ and selling it either in whole or in part.  See the file
 ## <a id="doc">2.</a> Documentation
 Extensive documentation is available on our website.
 The home page for this release, including new features, is
-[here](https://www.tcl.tk/software/tcltk/8.7.html).
+[here](https://www.tcl-lang.org/software/tcltk/9.0.html).
 Detailed release notes can be found at the
 [file distributions page](https://sourceforge.net/projects/tcl/files/Tcl/)
 by clicking on the relevant version.
@@ -55,8 +66,8 @@ Xchange](https://www.tcl-lang.org/about/).
 There have been many Tcl books on the market.  Many are mentioned in
 [the Wiki](https://wiki.tcl-lang.org/_/ref?N=25206).

-The complete set of reference manual entries for Tcl 8.7 is [online,
-here](https://www.tcl-lang.org/man/tcl8.7/).
+The complete set of reference manual entries for Tcl 9.0 is [online,
+here](https://www.tcl-lang.org/man/tcl9.0/).

 ### <a id="doc.unix">2a.</a> Unix Documentation
 The `doc` subdirectory in this release contains a complete set of
@@ -96,7 +107,7 @@ Tcl Dev Kit builds on the earlier TclPro toolset and provides a debugger,
 static code checker, single-file wrapping utility, bytecode compiler, and
 more.  More information can be found at

-	http://www.ActiveState.com/Tcl
+	https://www.activestate.com/products/tcl/

 ## <a id="complangtcl">5.</a> Tcl newsgroup
 There is a USENET newsgroup, "`comp.lang.tcl`", intended for the exchange of
@@ -8843,7 +8843,7 @@ in this changeset (new minor version) rather than bug fixes:

 2017-09-02 (bug)[0e4d88] replace command, delete trace kills namespace (porter)

--- Released 8.7a1, September 8, 2017 --- http://core.tcl.tk/tcl/ for details
+--- Released 8.7a1, September 8, 2017 --- https://core.tcl-lang.org/tcl/ for details

 2017-08-10 [array names -regexp] supports backrefs (goth)

@@ -8942,7 +8942,7 @@ in this changeset (new minor version) rather than bug fixes:

 2018-11-16 (bug)[00d04c] Repair [binary encode base64] (sebres)

- Released 8.6.9, November 16, 2018 - details at http://core.tcl-lang.org/tcl/ -
+- Released 8.6.9, November 16, 2018 - details at https://core.tcl-lang.org/tcl/ -

 2018-11-22 (bug)[7a9dc5] [file normalize ~/~foo] segfault (sebres)

@@ -8990,7 +8990,162 @@ in this changeset (new minor version) rather than bug fixes:

 2019-11-15 (bug)[135804] segfault in [next] after destroy (coulter,sebres)

- Released 8.6.10, Nov 21, 2019 - details at http://core.tcl-lang.org/tcl/ -
+2019-11-18 (bug)[13657a] application/json us text, not binary (noe,nijtmans)
+=> http 2.9.1
+
+- Released 8.6.10, Nov 21, 2019 - details at https://core.tcl-lang.org/tcl/ -
+
+Changes to 8.7a3 include all changes to the 8.6 line through 8.6.10,
+plus the following, which focuses on the high-level feature changes
+in this changeset (new minor version) rather than bug fixes:
+
+2017-11-01 (bug)[3c32a3] crash deleting class mixed into instance (coulter)
+
+2017-11-03 [TIP 345] eliminate the encoding 'identity' (porter)
+
+2017-11-04 (bug)[0d902e] [string first] on ASCII stored as Unicode (fellows)
+
+2017-11-17 [TIP 422] Mark all Tcl_*VA() routines deprecated. (nijtmans)
+
+2017-11-20 (support) Ended use of the obsolete values.h header (culler)
+
+2017-11-30 (bug)[8e1e31] [lsort] ordering of U+0000 (nijtmans)
+
+2017-12-07 [TIP 487] Terminate support for pre-XP Windows (nijtmans)
+
+2017-12-08 [TIP 477] Reform of nmake build (nadkarni)
+
+2017-12-20 (bug)[ba1419] Crash: complex ensemble delete, namespace-7.8 (coulter)
+
+2018-01-17 [TIP 485] Removal of many deprecated features (nijtmans)
+
+2018-01-27 (bug) Crash in [join $l $l], join-4.1 (porter)
+
+2018-02-06 [TIP 493] Cease Distribution of http 1.0 (porter)
+
+2018-02-06 [TIP 484] internal rep for native ints are all 64-bit (nijtmans)
+
+2018-02-14 [TIP 476] Scan/Printf consistency (nijtmans)
+
+2018-03-05 [TIP 351] [lsearch] striding
+
+2018-03-05 [TIPs 330,336] tighten access to Interp fields (porter)
+
+2018-03-12 [TIP 462] [::tcl::process]
+
+2018-03-12 [TIP 490] add oo support for msgcat => msgcat 1.7.0 (oehlmann)
+
+2018-03-12 [TIP 499] custom locale preference list (oehlmann)
+=> msgcat 1.7.0
+
+2018-03-20 [TIP 503] End CONST84 support for Tcl 8.3 (porter)
+
+2018-03-30 Refactored [lrange] (spjuth)
+
+2018-04-20 [TIP 389] Unicode beyond BMP (nijtmans)
+
+2018-04-20 [TIP 421] [array for]
+
+2018-05-11 [TIP 425] Windows panic callback use of UTF-8
+
+2018-05-17 [TIP 491] Phase out --disable-threads support
+
+2018-06-03 [TIP 500] TclOO Private Methods and Variables
+
+2018-07-26 (bug)[ba921a] [string cat] of bytearrays (coulter,porter)
+
+2018-09-02 [TIP 478] Many new features in TclOO (lester,fellows)
+
+2018-09-04 (bug)[540bed] [binary format w] from bignum (nijtmans)
+
+2018-09-12 [TIP 430] zipfs and embedded script library (woods)
+
+2018-09-26 [TIP 508] [array default] (bonnet,fellows)
+
+2018-09-27 [TIP 515] level value reform (nijtmans)
+
+2018-09-27 [TIP 516] More OO slot operations (fellows)
+
+2018-09-27 [TIP 426] [info cmdtype] (fellows)
+
+2018-09-28 [TIP 509] Cross platform reentrant mutex
+
+2018-10-08 [TIP 514] native integers are 64-bit
+
+2018-10-12 [TIP 502] index value reform (porter)
+
+2018-11-06 [TIP 406] http cookies (fellows)
+
+2018-11-06 [TIP 445] Tcl_ObjType utilities (migrate to Tcl 9) (porter)
+
+2018-11-06 [TIP 501] [string is dict]
+
+2018-11-06 [TIP 519] inline export/unexport option for [oo::define]
+
+2018-11-06 [TIP 523] [lpop]
+
+2018-11-06 [TIP 524] TclOO custom dialects
+
+2018-11-06 [TIP 506] Tcl_(Incr|Decr)RefCount macros -> functions (porter)
+
+2018-11-15 [TIP 512] No stub for Tcl_SetExitProc()
+
+2019-04-08 (bug)[45b9fa] crash in [try] (coulter)
+
+2019-04-14 [TIP 160] terminal and serial channel controls
+
+2019-04-14 [TIP 312] more types for Tcl_LinkVar
+
+2019-04-14 [TIP 367] [lremove]
+
+2019-04-14 [TIP 504] [string insert]
+
+2019-04-16 [TIP 342] [dict getwithdefault]
+
+2019-04-23 (bug)[67a5ea] make [chan postevent] asynchronous
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2019-05-25 [TIP 431] [file tempdir]
+
+2019-05-25 [TIP 383] [coroinject], [coroprobe]
+
+2019-05-31 [TIP 544] Tcl_GetIntForIndex()
+
+2019-06-12 Replace TclOffset() with offsetof()
+
+2019-06-15 [TIP 461] string compare operators for [expr]
+
+2019-06-16 [TIP 521] floating point classification functions for [expr]
+
+2019-06-20 (bug)[6bdadf] crash multi-arg traced [lappend] (fellows)
+
+2019-06-28 [TIP 547] New encodings utf-16, ucs-2
+
+2019-09-14 [TIP 414] Tcl_InitSubsystems()
+
+2019-09-14 [TIP 548] wchar_t conversion functions
+
+- Released 8.7a3, Nov 21, 2019 --- https://core.tcl-lang.org/tcl/ for details -
+
+Changes to 9.0a1 include all changes to the 8.7 line through 8.7a3,
+plus the following, which focuses on the high-level feature changes
+in this changeset (new minor version) rather than bug fixes:
+
+2017-11-03 [TIP 114] Leading zero integer no longer means octal
+
+2017-11-03 [TIP 278] Revise variable name resolution, solve "Creative Writing"
+
+2017-11-03 [TIPs 330,336] Encapsulate struct Tcl_Interp
+
+2017-11-17 [TIP 422] Remove all Tcl_*VA() routines
+
+2017-12-15 [TIP 488] Disable magic $::tcl_precision
+
+2018-10-08 [TIP 494] Increased support for size_t value ranges
+
+2019-05-31 [TIP 537] 64-bit indices in regexp matching
+
+- Released 9.0a1, Nov 25, 2019 --- https://core.tcl-lang.org/tcl/ for details -

 2019-12-03 (bug)[3cd9be] Corner case in surrogate handling (nijtmans)

@@ -9119,139 +9274,142 @@ See RFC 2045

 2020-12-23 tzdata updated to Olson's tzdata2020e (jima)

- Released 8.6.11, Dec 31, 2020 - details at http://core.tcl-lang.org/tcl/ -
-
-Changes to 8.7a3 include all changes to the 8.6 line through 8.6.10,
-plus the following, which focuses on the high-level feature changes
-in this changeset (new minor version) rather than bug fixes:
-
-2017-11-01 (bug)[3c32a3] crash deleting class mixed into instance (coulter)
-
-2017-11-03 [TIP 345] eliminate the encoding 'identity' (porter)
-
-2017-11-04 (bug)[0d902e] [string first] on ASCII stored as Unicode (fellows)
-
-2017-11-17 [TIP 422] Mark all Tcl_*VA() routines deprecated. (nijtmans)
-
-2017-11-20 (support) Ended use of the obsolete values.h header (culler)
-
-2017-11-30 (bug)[8e1e31] [lsort] ordering of U+0000 (nijtmans)
-
-2017-12-07 [TIP 487] Terminate support for pre-XP Windows (nijtmans)
-
-2017-12-08 [TIP 477] Reform of nmake build (nadkarni)
-
-2017-12-20 (bug)[ba1419] Crash: complex ensemble delete, namespace-7.8 (coulter)
-
-2018-01-17 [TIP 485] Removal of many deprecated features (nijtmans)
-
-2018-01-27 (bug) Crash in [join $l $l], join-4.1 (porter)
-
-2018-02-06 [TIP 493] Cease Distribution of http 1.0 (porter)
-
-2018-02-06 [TIP 484] internal rep for native ints are all 64-bit (nijtmans)
-
-2018-02-14 [TIP 476] Scan/Printf consistency (nijtmans)
-
-2018-03-05 [TIP 351] [lsearch] striding
-
-2018-03-05 [TIPs 330,336] tighten access to Interp fields (porter)
-
-2018-03-12 [TIP 462] [::tcl::process]
-
-2018-03-12 [TIP 490] add oo support for msgcat => msgcat 1.7.0 (oehlmann)
-
-2018-03-12 [TIP 499] custom locale preference list (oehlmann)
-=> msgcat 1.7.0
-
-2018-03-20 [TIP 503] End CONST84 support for Tcl 8.3 (porter)
-
-2018-03-30 Refactored [lrange] (spjuth)
-
-2018-04-20 [TIP 389] Unicode beyond BMP (nijtmans)
-
-2018-04-20 [TIP 421] [array for]
-
-2018-05-11 [TIP 425] Windows panic callback use of UTF-8
-
-2018-05-17 [TIP 491] Phase out --disable-threads support
-
-2018-06-03 [TIP 500] TclOO Private Methods and Variables
-
-2018-07-26 (bug)[ba921a] [string cat] of bytearrays (coulter,porter)
-
-2018-09-02 [TIP 478] Many new features in TclOO (lester,fellows)
-
-2018-09-04 (bug)[540bed] [binary format w] from bignum (nijtmans)
-
-2018-09-12 [TIP 430] zipfs and embedded script library (woods)
-
-2018-09-26 [TIP 508] [array default] (bonnet,fellows)
-
-2018-09-27 [TIP 515] level value reform (nijtmans)
-
-2018-09-27 [TIP 516] More OO slot operations (fellows)
-
-2018-09-27 [TIP 426] [info cmdtype] (fellows)
-
-2018-09-28 [TIP 509] Cross platform reentrant mutex
-
-2018-10-08 [TIP 514] native integers are 64-bit
-
-2018-10-12 [TIP 502] index value reform (porter)
-
-2018-11-06 [TIP 406] http cookies (fellows)
-
-2018-11-06 [TIP 445] Tcl_ObjType utilities (migrate to Tcl 9) (porter)
-
-2018-11-06 [TIP 501] [string is dict]
-
-2018-11-06 [TIP 519] inline export/unexport option for [oo::define]
-
-2018-11-06 [TIP 523] [lpop]
-
-2018-11-06 [TIP 524] TclOO custom dialects
-
-2018-11-06 [TIP 506] Tcl_(Incr|Decr)RefCount macros -> functions (porter)
-
-2018-11-15 [TIP 512] No stub for Tcl_SetExitProc()
-
-2019-04-08 (bug)[45b9fa] crash in [try] (coulter)
-
-2019-04-14 [TIP 160] terminal and serial channel controls
-
-2019-04-14 [TIP 312] more types for Tcl_LinkVar
-
-2019-04-14 [TIP 367] [lremove]
-
-2019-04-14 [TIP 504] [string insert]
-
-2019-04-16 [TIP 342] [dict getwithdefault]
-
-2019-05-25 [TIP 431] [file tempdir]
-
-2019-05-25 [TIP 383] [coroinject], [coroprobe]
-
-2019-05-31 [TIP 544] Tcl_GetIntForIndex()
-
-2019-06-12 Replace TclOffset() with offsetof()
-
-2019-06-15 [TIP 461] string compare operators for [expr]
-
-2019-06-16 [TIP 521] floating point classification functions for [expr]
-
-2019-06-20 (bug)[6bdadf] crash multi-arg traced [lappend] (fellows)
-
-2019-06-28 [TIP 547] New encodings utf-16, ucs-2
-
-2019-09-14 [TIP 414] Tcl_InitSubsystems()
-
-2019-09-14 [TIP 548] wchar_t conversion functions
-
- Released 8.7a3, Nov 21, 2019 --- http://core.tcl-lang.org/tcl/ for details -
+- Released 8.6.11, Dec 31, 2020 - details at https://core.tcl-lang.org/tcl/ -

 Changes to 8.7a5 include all changes to the 8.6 line through 8.6.11,
 plus the following, which focuses on the high-level feature changes
 in this changeset (new minor version) rather than bug fixes:

- Released 8.7a5, Jan 21, 2021 --- http://core.tcl-lang.org/tcl/ for details -
+2019-12-13 [TIP 538] Externalize libtommath
+
+2020-01-20 [TIP 542] Support for switchable Full Unicode support
+
+2020-01-21 [TIP 543] Eliminate `TCL_INTERP_DESTROYED` flag value
+
+2020-01-24 [TIP 559] Eliminate public routine `Tcl_FreeResult
+
+2020-01-31 (new) Implement 64-bit seek on Zip channels. (nijtmans)
+
+2020-02-28 [TIP 557] C++ support for Tcl
+
+2020-02-28 [TIP 562] Deprecate channel types 1-4
+
+2020-03-11 (bug)[234d6c] Segfault in [set l {}; lpop l] (sebres)
+
+2020-03-12 (bug) Crash in tests binary-79.[12] (porter)
+
+2020-03-13 [TIP 569] Eliminate Comments That Serve Lint
+
+2020-04-06 (bug)[dd010c] [string trim*] on astral characters (porter,nijtmans)
+
+2020-05-30 [TIP 551] Permit underscore in numerical literals in source code
+
+2020-07-03 [TIP 578] Death to TCL_DBGX
+
+2020-08-11 (bug)[e87000] Win32 crash in [fconfigure stdout] (werner,nijtmans)
+
+2020-09-06 (bug)[c1a376] deletion trace on imported ensemble (coulter)
+
+2020-09-13 [TIP 585] Promote the INDEX_TEMP_TABLE flag of Tcl_GetIndexFromObj*() to the public interface
+
+2020-09-15 (bug)[b5777d] crash in [string index abcd 0-0x10000000000000000]
+
+2020-09-19 [b9ecf3] revised stork mgmt [uplevel [list $cmd ...]] (coulter)
+
+2020-10-23 [TIP 587] Default utf-8 for source command
+
+2020-10-27 (bug)[11229b] test string-31.26.* (porter)
+
+2020-11-08 [TIP 582] Comments in Expressions
+
+2020-11-16 [TIP 586] C String Parsing Support for binary scan
+
+2020-12-07 [TIP 590] Recommend lowercase Package Names
+
+2021-01-06 Bump to tcltest 2.5.4
+
+2021-01-15 [TIP 481] `Tcl_GetStringFromObj()` with `size_t` length parameter
+
+2021-01-15 [TIP 592] End support: Windows XP, Server 2003, Vista, Server 2008
+
+2021-01-25 tzdata updated to Olson's tzdata2021a (nijtmans)
+
+2021-01-29 (bug)[113be1] zipfs on mac
+
+2021-03-15 [TIP 575] Switchable Tcl_UtfCharComplete()/Tcl_UtfNext()/Tcl_UtfPrev()
+
+2021-03-19 (new)[0221b9] Drop TCL_WINDOW_EVENTS from Tcl's [update idletasks]
+
+2021-03-30 (new)[4b4830] [chan truncate] for reflected channels
+
+2021-04-30 [TIP 597] "string is unicode" and better utf-8/utf-16/cesu-8 encodings
+
+2021-04-09 [TIP 598] export TclWinConvertError
+
+2021-05-15 (bug)[463b7a] segfault from Tcl_Unload (coulter)
+
+2021-05-15 (bug)[fb2a41] tclZipfs.c free all memory (coulter)
+
+2021-05-18 (bug)[688fcc,28027d] namespace teardown reform (coulter)
+
+- Released 8.7a5, Jun 18, 2021 --- https://core.tcl-lang.org/tcl/ for details -
+
+Changes to 9.0a3 include all changes to the 8.7 line through 8.7a5,
+plus the following, which focuses on the high-level feature changes
+in this changeset (new major version) rather than bug fixes:
+
+Many of the TIPs in Tcl 8.7 mentioned above are extended further in 9.0
+
+2020-02-28 [TIP 497] Full support for Unicode planes 1-16
+
+2020-08-21 (bug)[43b434] improper calls to stat64()
+
+2021-04-08 [TIP 595] Unicode-aware loadable library handling.
+
+2021-04-30 [TIP 596] Stubs support for embedding Tcl in apps
+
+Many internal changes to broaden support for sizes beyond 32-bits.
+
+- Released 9.0a3, Jun 23, 2021 --- https://core.tcl-lang.org/tcl/ for details -
+
+2021-02-02 (new) support for MacOS Big Sur updates (nijtmans)
+=> platform 1.0.17
+
+2021-02-15 (bug)[d43f96] [string trim*] broken for Emoji (werner)
+
+2021-02-16 (bug)[22324b] [string reverse] broken for Emoji (werner)
+
+2021-02-19 (bug)[1dab71,7c64aa] BRE broken by uninitialized value use (lane)
+
+2021-03-09 (bug)[8419c5] Unix tty channels tolerate EINTR (nijtmans)
+        *** POTENTIAL INCOMPATIBILITY ***
+
+2021-03-10 (bug)[4c591f] [string compare] EIAS violation (nijtmans)
+
+2021-04-08 (new) dde package installation compatible with Tcl 9 (nijtmans)
+=> dde 1.4.4
+
+2021-04-14 (bug)[266494] [concat foo [list #]] EIAS violation (porter)
+
+2021-05-03 (bug)[24b918] Save IO buffers from modern optimizers (rupprecht)
+
+2021-05-06 (new) support for POSIX error EILSEQ (nijtmans)
+
+2021-05-17 (bug)[688fcc] segfault during traced delete of alias (coulter)
+
+2021-06-22 (bug)[bad6cc] More secure build tool. CVE-2021-35331 (nijtmans)
+
+2021-07-17 (bug)[592a25] Win: segfault in Tcl_PutEnv() (danckaert,nijtmans)
+
+2021-09-02 (bug)[ccc448] segfault in ensemble rewrite machinery (coulter)
+
+2021-09-14 (new) Update to Unicode-14 (nijtmans)
+
+2021-10-08 (bug)[a8579d] failed proc argument spec processing (russell,coulter)
+
+2021-10-27 (new) support for MacOS Monterey (nijtmans)
+=> platform 1.0.18
+
+2021-10-27 tzdata updated to Olson's tzdata2021e (nijtmans)
+
+- Released 8.6.12, Nov 5, 2021 - details at https://core.tcl-lang.org/tcl/ -
@@ -28,7 +28,7 @@ opendir(
    if ((fd = open(myname, 0, 0)) == -1) {
 	return NULL;
    }
-    dirp = (DIR *) ckalloc(sizeof(DIR));
+    dirp = (DIR *) Tcl_Alloc(sizeof(DIR));
    if (dirp == NULL) {
 	/* unreachable? */
 	close(fd);
@@ -106,5 +106,5 @@ closedir(
    close(dirp->dd_fd);
    dirp->dd_fd = -1;
    dirp->dd_loc = 0;
-    ckfree(dirp);
+    Tcl_Free(dirp);
 }
@@ -100,7 +100,7 @@ waitpid(
 	} else {
 	    prevPtr->nextPtr = waitPtr->nextPtr;
 	}
-	ckfree(waitPtr);
+	Tcl_Free(waitPtr);
 	return result;
    }

@@ -156,7 +156,7 @@ waitpid(
 		goto waitAgain;
 	    }
 	}
-	waitPtr = (WaitInfo *) ckalloc(sizeof(WaitInfo));
+	waitPtr = (WaitInfo *) Tcl_Alloc(sizeof(WaitInfo));
 	waitPtr->pid = result;
 	waitPtr->status = status;
 	waitPtr->nextPtr = deadList;
@@ -3,7 +3,7 @@ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

 project(zlib C)

-set(VERSION "1.2.11")
+set(VERSION "1.2.12")

 option(ASM686 "Enable building i686 assembly implementation")
 option(AMD64 "Enable building amd64 assembly implementation")
@@ -1,6 +1,69 @@

                ChangeLog file for zlib

+Changes in 1.2.12 (27 Mar 2022)
+- Cygwin does not have _wopen(), so do not create gzopen_w() there
+- Permit a deflateParams() parameter change as soon as possible
+- Limit hash table inserts after switch from stored deflate
+- Fix bug when window full in deflate_stored()
+- Fix CLEAR_HASH macro to be usable as a single statement
+- Avoid a conversion error in gzseek when off_t type too small
+- Have Makefile return non-zero error code on test failure
+- Avoid some conversion warnings in gzread.c and gzwrite.c
+- Update use of errno for newer Windows CE versions
+- Small speedup to inflate [psumbera]
+- Return an error if the gzputs string length can't fit in an int
+- Add address checking in clang to -w option of configure
+- Don't compute check value for raw inflate if asked to validate
+- Handle case where inflateSync used when header never processed
+- Avoid the use of ptrdiff_t
+- Avoid an undefined behavior of memcpy() in gzappend()
+- Avoid undefined behaviors of memcpy() in gz*printf()
+- Avoid an undefined behavior of memcpy() in _tr_stored_block()
+- Make the names in functions declarations identical to definitions
+- Remove old assembler code in which bugs have manifested
+- Fix deflateEnd() to not report an error at start of raw deflate
+- Add legal disclaimer to README
+- Emphasize the need to continue decompressing gzip members
+- Correct the initialization requirements for deflateInit2()
+- Fix a bug that can crash deflate on some input when using Z_FIXED
+- Assure that the number of bits for deflatePrime() is valid
+- Use a structure to make globals in enough.c evident
+- Use a macro for the printf format of big_t in enough.c
+- Clean up code style in enough.c, update version
+- Use inline function instead of macro for index in enough.c
+- Clarify that prefix codes are counted in enough.c
+- Show all the codes for the maximum tables size in enough.c
+- Add gznorm.c example, which normalizes gzip files
+- Fix the zran.c example to work on a multiple-member gzip file
+- Add tables for crc32_combine(), to speed it up by a factor of 200
+- Add crc32_combine_gen() and crc32_combine_op() for fast combines
+- Speed up software CRC-32 computation by a factor of 1.5 to 3
+- Use atomic test and set, if available, for dynamic CRC tables
+- Don't bother computing check value after successful inflateSync()
+- Correct comment in crc32.c
+- Add use of the ARMv8 crc32 instructions when requested
+- Use ARM crc32 instructions if the ARM architecture has them
+- Explicitly note that the 32-bit check values are 32 bits
+- Avoid adding empty gzip member after gzflush with Z_FINISH
+- Fix memory leak on error in gzlog.c
+- Fix error in comment on the polynomial representation of a byte
+- Clarify gz* function interfaces, referring to parameter names
+- Change macro name in inflate.c to avoid collision in VxWorks
+- Correct typo in blast.c
+- Improve portability of contrib/minizip
+- Fix indentation in minizip's zip.c
+- Replace black/white with allow/block. (theresa-m)
+- minizip warning fix if MAXU32 already defined. (gvollant)
+- Fix unztell64() in minizip to work past 4GB. (Daniël Hörchner)
+- Clean up minizip to reduce warnings for testing
+- Add fallthrough comments for gcc
+- Eliminate use of ULL constants
+- Separate out address sanitizing from warnings in configure
+- Remove destructive aspects of make distclean
+- Check for cc masquerading as gcc or clang in configure
+- Fix crc32.c to compile local functions only if used
+
 Changes in 1.2.11 (15 Jan 2017)
 - Fix deflate stored bug when pulling last block from window
 - Permit immediate deflateParams changes before any deflate input
@@ -511,7 +574,7 @@ Changes in 1.2.3.5 (8 Jan 2010)
 - Don't use _vsnprintf on later versions of MSVC [Lowman]
 - Add CMake build script and input file [Lowman]
 - Update contrib/minizip to 1.1 [Svensson, Vollant]
- Moved nintendods directory from contrib to .
+- Moved nintendods directory from contrib to root
 - Replace gzio.c with a new set of routines with the same functionality
 - Add gzbuffer(), gzoffset(), gzclose_r(), gzclose_w() as part of above
 - Update contrib/minizip to 1.1b
@@ -685,7 +748,7 @@ Changes in 1.2.2.4 (11 July 2005)
 - Be more strict on incomplete code sets in inflate_table() and increase
  ENOUGH and MAXD -- this repairs a possible security vulnerability for
  invalid inflate input.  Thanks to Tavis Ormandy and Markus Oberhumer for
-  discovering the vulnerability and providing test cases.
+  discovering the vulnerability and providing test cases
 - Add ia64 support to configure for HP-UX [Smith]
 - Add error return to gzread() for format or i/o error [Levin]
 - Use malloc.h for OS/2 [Necasek]
@@ -721,7 +784,7 @@ Changes in 1.2.2.2 (30 December 2004)
 - Add Z_FIXED strategy option to deflateInit2() to force fixed trees
 - Add updated make_vms.com [Coghlan], update README
 - Create a new "examples" directory, move gzappend.c there, add zpipe.c,
-  fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html.
+  fitblk.c, gzlog.[ch], gzjoin.c, and zlib_how.html
 - Add FAQ entry and comments in deflate.c on uninitialized memory access
 - Add Solaris 9 make options in configure [Gilbert]
 - Allow strerror() usage in gzio.c for STDC
@@ -792,7 +855,7 @@ Changes in 1.2.1.1 (9 January 2004)
 - Fix a big fat bug in inftrees.c that prevented decoding valid
  dynamic blocks with only literals and no distance codes --
  Thanks to "Hot Emu" for the bug report and sample file
- Add a note to puff.c on no distance codes case.
+- Add a note to puff.c on no distance codes case

 Changes in 1.2.1 (17 November 2003)
 - Remove a tab in contrib/gzappend/gzappend.c
@@ -1036,14 +1099,14 @@ Changes in 1.2.0 (9 March 2003)
 - Add contrib/puff/ simple inflate for deflate format description

 Changes in 1.1.4 (11 March 2002)
- ZFREE was repeated on same allocation on some error conditions.
+- ZFREE was repeated on same allocation on some error conditions
  This creates a security problem described in
  http://www.zlib.org/advisory-2002-03-11.txt
 - Returned incorrect error (Z_MEM_ERROR) on some invalid data
 - Avoid accesses before window for invalid distances with inflate window
-  less than 32K.
+  less than 32K
 - force windowBits > 8 to avoid a bug in the encoder for a window size
-  of 256 bytes. (A complete fix will be available in 1.1.5).
+  of 256 bytes. (A complete fix will be available in 1.1.5)

 Changes in 1.1.3 (9 July 1998)
 - fix "an inflate input buffer bug that shows up on rare but persistent
@@ -1117,7 +1180,7 @@ Changes in 1.1.1 (27 Feb 98)
 - remove block truncation heuristic which had very marginal effect for zlib
  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
  compression ratio on some files. This also allows inlining _tr_tally for
-  matches in deflate_slow.
+  matches in deflate_slow
 - added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)

 Changes in 1.1.0 (24 Feb 98)
@@ -1162,7 +1225,7 @@ Changes in 1.0.8 (27 Jan 1998)
 - include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
 - use constant arrays for the static trees in trees.c instead of computing
  them at run time (thanks to Ken Raeburn for this suggestion). To create
-  trees.h, compile with GEN_TREES_H and run "make test".
+  trees.h, compile with GEN_TREES_H and run "make test"
 - check return code of example in "make test" and display result
 - pass minigzip command line options to file_compress
 - simplifying code of inflateSync to avoid gcc 2.8 bug
@@ -1201,12 +1264,12 @@ Changes in 1.0.6 (19 Jan 1998)
 - add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
  gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
 - Fix a deflate bug occurring only with compression level 0 (thanks to
-  Andy Buckler for finding this one).
- In minigzip, pass transparently also the first byte for .Z files.
+  Andy Buckler for finding this one)
+- In minigzip, pass transparently also the first byte for .Z files
 - return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
 - check Z_FINISH in inflate (thanks to Marc Schluper)
 - Implement deflateCopy (thanks to Adam Costello)
- make static libraries by default in configure, add --shared option.
+- make static libraries by default in configure, add --shared option
 - move MSDOS or Windows specific files to directory msdos
 - suppress the notion of partial flush to simplify the interface
  (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
@@ -1218,7 +1281,7 @@ Changes in 1.0.6 (19 Jan 1998)
 - added Makefile.nt (thanks to Stephen Williams)
 - added the unsupported "contrib" directory:
   contrib/asm386/ by Gilles Vollant <info@winimage.com>
-        386 asm code replacing longest_match().
+        386 asm code replacing longest_match()
   contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
        A C++ I/O streams interface to the zlib gz* functions
   contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
@@ -1226,7 +1289,7 @@ Changes in 1.0.6 (19 Jan 1998)
   contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
        A very simple tar.gz file extractor using zlib
   contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
-        How to use compress(), uncompress() and the gz* functions from VB.
+        How to use compress(), uncompress() and the gz* functions from VB
 - pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
  level) in minigzip (thanks to Tom Lane)

@@ -1235,8 +1298,8 @@ Changes in 1.0.6 (19 Jan 1998)
 - add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
 - add undocumented function zError to convert error code to string
  (for Tim Smithers)
- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
- Use default memcpy for Symantec MSDOS compiler.
+- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code
+- Use default memcpy for Symantec MSDOS compiler
 - Add EXPORT keyword for check_func (needed for Windows DLL)
 - add current directory to LD_LIBRARY_PATH for "make test"
 - create also a link for libz.so.1
@@ -1249,7 +1312,7 @@ Changes in 1.0.6 (19 Jan 1998)
 - allow compilation with ANSI keywords only enabled for TurboC in large model
 - avoid "versionString"[0] (Borland bug)
 - add NEED_DUMMY_RETURN for Borland
- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
+- use variable z_verbose for tracing in debug mode (L. Peter Deutsch)
 - allow compilation with CC
 - defined STDC for OS/2 (David Charlap)
 - limit external names to 8 chars for MVS (Thomas Lund)
@@ -1259,7 +1322,7 @@ Changes in 1.0.6 (19 Jan 1998)
 - use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
 - added makelcc.bat for lcc-win32 (Tom St Denis)
 - in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
+- Avoid expanded $Id$. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion
 - check for unistd.h in configure (for off_t)
 - remove useless check parameter in inflate_blocks_free
 - avoid useless assignment of s->check to itself in inflate_blocks_new
@@ -1280,7 +1343,7 @@ Changes in 1.0.5 (3 Jan 98)
 Changes in 1.0.4 (24 Jul 96)
 - In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
  bit, so the decompressor could decompress all the correct data but went
-  on to attempt decompressing extra garbage data. This affected minigzip too.
+  on to attempt decompressing extra garbage data. This affected minigzip too
 - zlibVersion and gzerror return const char* (needed for DLL)
 - port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
 - use z_error only for DEBUG (avoid problem with DLLs)
@@ -1310,7 +1373,7 @@ Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
 - fix array overlay in deflate.c which sometimes caused bad compressed data
 - fix inflate bug with empty stored block
 - fix MSDOS medium model which was broken in 0.99
- fix deflateParams() which could generate bad compressed data.
+- fix deflateParams() which could generate bad compressed data
 - Bytef is define'd instead of typedef'ed (work around Borland bug)
 - added an INDEX file
 - new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
@@ -1331,7 +1394,7 @@ Changes in 0.99 (27 Jan 96)
 - allow preset dictionary shared between compressor and decompressor
 - allow compression level 0 (no compression)
 - add deflateParams in zlib.h: allow dynamic change of compression level
-  and compression strategy.
+  and compression strategy
 - test large buffers and deflateParams in example.c
 - add optional "configure" to build zlib as a shared library
 - suppress Makefile.qnx, use configure instead
@@ -1373,30 +1436,30 @@ Changes in 0.99 (27 Jan 96)
 - use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
 - use Z_BINARY instead of BINARY
 - document that gzclose after gzdopen will close the file
- allow "a" as mode in gzopen.
+- allow "a" as mode in gzopen
 - fix error checking in gzread
 - allow skipping .gz extra-field on pipes
 - added reference to Perl interface in README
 - put the crc table in FAR data (I dislike more and more the medium model :)
 - added get_crc_table
- added a dimension to all arrays (Borland C can't count).
+- added a dimension to all arrays (Borland C can't count)
 - workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
 - guard against multiple inclusion of *.h (for precompiled header on Mac)
- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
+- Watcom C pretends to be Microsoft C small model even in 32 bit mode
 - don't use unsized arrays to avoid silly warnings by Visual C++:
     warning C4746: 'inflate_mask' : unsized array treated as  '__far'
-     (what's wrong with far data in far model?).
+     (what's wrong with far data in far model?)
 - define enum out of inflate_blocks_state to allow compilation with C++

 Changes in 0.95 (16 Aug 95)
 - fix MSDOS small and medium model (now easier to adapt to any compiler)
 - inlined send_bits
 - fix the final (:-) bug for deflate with flush (output was correct but
-  not completely flushed in rare occasions).
+  not completely flushed in rare occasions)
 - default window size is same for compression and decompression
-  (it's now sufficient to set MAX_WBITS in zconf.h).
+  (it's now sufficient to set MAX_WBITS in zconf.h)
 - voidp -> voidpf and voidnp -> voidp (for consistency with other
-  typedefs and because voidnp was not near in large model).
+  typedefs and because voidnp was not near in large model)

 Changes in 0.94 (13 Aug 95)
 - support MSDOS medium model
@@ -1405,12 +1468,12 @@ Changes in 0.94 (13 Aug 95)
 - added support for VMS
 - allow a compression level in gzopen()
 - gzflush now calls fflush
- For deflate with flush, flush even if no more input is provided.
+- For deflate with flush, flush even if no more input is provided
 - rename libgz.a as libz.a
 - avoid complex expression in infcodes.c triggering Turbo C bug
 - work around a problem with gcc on Alpha (in INSERT_STRING)
 - don't use inline functions (problem with some gcc versions)
- allow renaming of Byte, uInt, etc... with #define.
+- allow renaming of Byte, uInt, etc... with #define
 - avoid warning about (unused) pointer before start of array in deflate.c
 - avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
 - avoid reserved word 'new' in trees.c
@@ -1429,7 +1492,7 @@ Changes in 0.92 (3 May 95)
 - no memcpy on Pyramid
 - suppressed inftest.c
 - optimized fill_window, put longest_match inline for gcc
- optimized inflate on stored blocks.
+- optimized inflate on stored blocks
 - untabify all sources to simplify patches

 Changes in 0.91 (2 May 95)
@@ -1447,7 +1510,7 @@ Changes in 0.9 (1 May 95)
 - let again gzread copy uncompressed data unchanged (was working in 0.71)
 - deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
 - added a test of inflateSync in example.c
- moved MAX_WBITS to zconf.h because users might want to change that.
+- moved MAX_WBITS to zconf.h because users might want to change that
 - document explicitly that zalloc(64K) on MSDOS must return a normalized
  pointer (zero offset)
 - added Makefiles for Microsoft C, Turbo C, Borland C++
@@ -1456,7 +1519,7 @@ Changes in 0.9 (1 May 95)
 Changes in 0.8 (29 April 95)
 - added fast inflate (inffast.c)
 - deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
-  is incompatible with previous versions of zlib which returned Z_OK.
+  is incompatible with previous versions of zlib which returned Z_OK
 - work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
  (actually that was not a compiler bug, see 0.81 above)
 - gzread no longer reads one extra byte in certain cases
@@ -1466,50 +1529,50 @@ Changes in 0.8 (29 April 95)

 Changes in 0.71 (14 April 95)
 - Fixed more MSDOS compilation problems :( There is still a bug with
-  TurboC large model.
+  TurboC large model

 Changes in 0.7 (14 April 95)
- Added full inflate support.
+- Added full inflate support
 - Simplified the crc32() interface. The pre- and post-conditioning
  (one's complement) is now done inside crc32(). WARNING: this is
-  incompatible with previous versions; see zlib.h for the new usage.
+  incompatible with previous versions; see zlib.h for the new usage

 Changes in 0.61 (12 April 95)
- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
+- workaround for a bug in TurboC. example and minigzip now work on MSDOS

 Changes in 0.6 (11 April 95)
 - added minigzip.c
 - added gzdopen to reopen a file descriptor as gzFile
- added transparent reading of non-gziped files in gzread.
+- added transparent reading of non-gziped files in gzread
 - fixed bug in gzread (don't read crc as data)
- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
+- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose)
 - don't allocate big arrays in the stack (for MSDOS)
 - fix some MSDOS compilation problems

 Changes in 0.5:
 - do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
-  not yet Z_FULL_FLUSH.
+  not yet Z_FULL_FLUSH
 - support decompression but only in a single step (forced Z_FINISH)
- added opaque object for zalloc and zfree.
+- added opaque object for zalloc and zfree
 - added deflateReset and inflateReset
- added a variable zlib_version for consistency checking.
- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
-  Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
+- added a variable zlib_version for consistency checking
+- renamed the 'filter' parameter of deflateInit2 as 'strategy'
+  Added Z_FILTERED and Z_HUFFMAN_ONLY constants

 Changes in 0.4:
- avoid "zip" everywhere, use zlib instead of ziplib.
+- avoid "zip" everywhere, use zlib instead of ziplib
 - suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
-  if compression method == 8.
+  if compression method == 8
 - added adler32 and crc32
 - renamed deflateOptions as deflateInit2, call one or the other but not both
- added the method parameter for deflateInit2.
+- added the method parameter for deflateInit2
 - added inflateInit2
 - simplied considerably deflateInit and inflateInit by not supporting
  user-provided history buffer. This is supported only in deflateInit2
-  and inflateInit2.
+  and inflateInit2

 Changes in 0.3:
 - prefix all macro names with Z_
- use Z_FINISH instead of deflateEnd to finish compression.
+- use Z_FINISH instead of deflateEnd to finish compression
 - added Z_HUFFMAN_ONLY
 - added gzerror()
@@ -32,7 +32,7 @@ CPP=$(CC) -E

 STATICLIB=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.2.11
+SHAREDLIBV=libz.so.1.2.12
 SHAREDLIBM=libz.so.1
 LIBS=$(STATICLIB) $(SHAREDLIBV)

@@ -91,8 +91,8 @@ teststatic: static
 	  echo '		*** zlib test OK ***'; \
 	else \
 	  echo '		*** zlib test FAILED ***'; false; \
-	fi; \
-	rm -f $$TMPST
+	fi
+	@rm -f tmpst_$$

 testshared: shared
 	@LD_LIBRARY_PATH=`pwd`:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
@@ -104,8 +104,8 @@ testshared: shared
 	  echo '		*** zlib shared test OK ***'; \
 	else \
 	  echo '		*** zlib shared test FAILED ***'; false; \
-	fi; \
-	rm -f $$TMPSH
+	fi
+	@rm -f tmpsh_$$

 test64: all64
 	@TMP64=tmp64_$$; \
@@ -113,8 +113,8 @@ test64: all64
 	  echo '		*** zlib 64-bit test OK ***'; \
 	else \
 	  echo '		*** zlib 64-bit test FAILED ***'; false; \
-	fi; \
-	rm -f $$TMP64
+	fi
+	@rm -f tmp64_$$

 infcover.o: $(SRCDIR)test/infcover.c $(SRCDIR)zlib.h zconf.h
 	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/infcover.c
@@ -376,15 +376,13 @@ clean:
 	rm -f contrib/infback9/*.gcda contrib/infback9/*.gcno contrib/infback9/*.gcov

 maintainer-clean: distclean
-distclean: clean zconf zconf.h.cmakein docs
+distclean: clean zconf zconf.h.cmakein
 	rm -f Makefile zlib.pc configure.log
 	-@rm -f .DS_Store
 	@if [ -f Makefile.in ]; then \
 	printf 'all:\n\t-@echo "Please use ./configure first.  Thank you."\n' > Makefile ; \
 	printf '\ndistclean:\n\tmake -f Makefile.in distclean\n' >> Makefile ; \
 	touch -r $(SRCDIR)Makefile.in Makefile ; fi
-	@if [ ! -f zconf.h.in ]; then rm -f zconf.h zconf.h.cmakein ; fi
-	@if [ ! -f zlib.3 ]; then rm -f zlib.3.pdf ; fi

 tags:
 	etags $(SRCDIR)*.[ch]
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.2.11 is a general purpose data compression library.  All the code is
+zlib 1.2.12 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://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
@@ -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
 http://marknelson.us/1997/01/01/zlib-engine/ .

-The changes made in version 1.2.11 are documented in the file ChangeLog.
+The changes made in version 1.2.12 are documented in the file ChangeLog.

 Unsupported third party contributions are provided in directory contrib/ .

@@ -84,7 +84,7 @@ Acknowledgments:

 Copyright notice:

- (C) 1995-2017 Jean-loup Gailly and Mark Adler
+ (C) 1995-2022 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
@@ -108,7 +108,10 @@ Copyright notice:
 If you use the zlib library in a product, we would appreciate *not* receiving
 lengthy legal documents to sign.  The sources are provided for free but without
 warranty of any kind.  The library has been entirely written by Jean-loup
-Gailly and Mark Adler; it does not include third-party code.
+Gailly and Mark Adler; it does not include third-party code.  We make all
+contributions to and distributions of this project solely in our personal
+capacity, and are not conveying any rights to any intellectual property of
+any third parties.

 If you redistribute modified sources, we would appreciate that you include in
 the file ChangeLog history information documenting your changes.  Please read
@@ -87,6 +87,7 @@ build64=0
 gcc=0
 warn=0
 debug=0
+sanitize=0
 old_cc="$CC"
 old_cflags="$CFLAGS"
 OBJC='$(OBJZ) $(OBJG)'
@@ -137,6 +138,7 @@ case "$1" in
    -c* | --const) zconst=1; shift ;;
    -w* | --warn) warn=1; shift ;;
    -d* | --debug) debug=1; shift ;;
+    --sanitize) sanitize=1; shift ;;
    *)
      echo "unknown option: $1" | tee -a configure.log
      echo "$0 --help for help" | tee -a configure.log
@@ -165,8 +167,14 @@ extern int getchar();
 int hello() {return getchar();}
 EOF

-test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
-cc=${CC-${CROSS_PREFIX}gcc}
+if test -z "$CC"; then
+  echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
+  if ${CROSS_PREFIX}gcc -v >/dev/null 2>&1; then
+    cc=${CROSS_PREFIX}gcc
+  else
+    cc=${CROSS_PREFIX}cc
+  fi
+fi
 cflags=${CFLAGS-"-O3"}
 # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
 case "$cc" in
@@ -199,6 +207,9 @@ if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
      CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
    fi
  fi
+  if test $sanitize -eq 1; then
+    CFLAGS="${CFLAGS} -fsanitize=address"
+  fi
  if test $debug -eq 1; then
    CFLAGS="${CFLAGS} -DZLIB_DEBUG"
    SFLAGS="${SFLAGS} -DZLIB_DEBUG"
@@ -367,8 +378,11 @@ else
  try()
  {
    show $*
-    ( $* ) >> configure.log 2>&1
+    got=`( $* ) 2>&1`
    ret=$?
+    if test "$got" != ""; then
+      printf "%s\n" "$got" >> configure.log
+    fi
    if test $ret -ne 0; then
      echo "(exit code "$ret")" >> configure.log
    fi
@@ -381,8 +395,11 @@ tryboth()
  show $*
  got=`( $* ) 2>&1`
  ret=$?
-  printf %s "$got" >> configure.log
+  if test "$got" != ""; then
+    printf "%s\n" "$got" >> configure.log
+  fi
  if test $ret -ne 0; then
+    echo "(exit code "$ret")" >> configure.log
    return $ret
  fi
  test "$got" = ""
@@ -457,17 +474,11 @@ size_t dummy = 0;
 EOF
 if try $CC -c $CFLAGS $test.c; then
  echo "Checking for size_t... Yes." | tee -a configure.log
-  need_sizet=0
 else
  echo "Checking for size_t... No." | tee -a configure.log
-  need_sizet=1
-fi
-
-echo >> configure.log
-
-# find the size_t integer type, if needed
-if test $need_sizet -eq 1; then
-  cat > $test.c <<EOF
+  # find a size_t integer type
+  # check for long long
+  cat > $test.c << EOF
 long long dummy = 0;
 EOF
  if try $CC -c $CFLAGS $test.c; then
@@ -495,17 +506,13 @@ EOF
  if try $CC $CFLAGS -o $test $test.c; then
    sizet=`./$test`
    echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
+    CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
+    SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
  else
-    echo "Failed to find a pointer-size integer type." | tee -a configure.log
-    leave 1
+    echo "Checking for a pointer-size integer type... not found." | tee -a configure.log
  fi
 fi

-if test $need_sizet -eq 1; then
-  CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
-  SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
-fi
-
 echo >> configure.log

 # check for large file support, and if none, check for fseeko()
@@ -849,7 +856,6 @@ echo SHAREDLIBV = $SHAREDLIBV >> configure.log
 echo STATICLIB = $STATICLIB >> configure.log
 echo TEST = $TEST >> configure.log
 echo VER = $VER >> configure.log
-echo Z_U4 = $Z_U4 >> configure.log
 echo SRCDIR = $SRCDIR >> configure.log
 echo exec_prefix = $exec_prefix >> configure.log
 echo includedir = $includedir >> configure.log
@@ -8,14 +8,6 @@ ada/        by Dmitriy Anisimkov <anisimkov@yahoo.com>
        Support for Ada
        See http://zlib-ada.sourceforge.net/

-amd64/      by Mikhail Teterin <mi@ALDAN.algebra.com>
-        asm code for AMD64
-        See patch at http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/96393
-
-asm686/     by Brian Raiter <breadbox@muppetlabs.com>
-        asm code for Pentium and PPro/PII, using the AT&T (GNU as) syntax
-        See http://www.muppetlabs.com/~breadbox/software/assembly.html
-
 blast/      by Mark Adler <madler@alumni.caltech.edu>
        Decompressor for output of PKWare Data Compression Library (DCL)

@@ -32,9 +24,6 @@ gcc_gvmat64/by Gilles Vollant <info@winimage.com>
 infback9/   by Mark Adler <madler@alumni.caltech.edu>
        Unsupported diffs to infback to decode the deflate64 format

-inflate86/  by Chris Anderson <christop@charm.net>
-        Tuned x86 gcc asm code to replace inflate_fast()
-
 iostream/   by Kevin Ruland <kevin@rodin.wustl.edu>
        A C++ I/O streams interface to the zlib gz* functions

@@ -45,16 +34,6 @@ iostream3/  by Ludwig Schwardt <schwardt@sun.ac.za>
            and Kevin Ruland <kevin@rodin.wustl.edu>
        Yet another C++ I/O streams interface

-masmx64/    by Gilles Vollant <info@winimage.com>
-        x86 64-bit (AMD64 and Intel EM64t) code for x64 assembler to
-        replace longest_match() and inflate_fast(),  also masm x86
-        64-bits translation of Chris Anderson inflate_fast()
-
-masmx86/    by Gilles Vollant <info@winimage.com>
-        x86 asm code to replace longest_match() and inflate_fast(),
-        for Visual C++ and MASM (32 bits).
-        Based on Brian Raiter (asm686) and Chris Anderson (inflate86)
-
 minizip/    by Gilles Vollant <info@winimage.com>
        Mini zip and unzip based on zlib
        Includes Zip64 support by Mathias Svensson <mathias@result42.com>
@@ -1,452 +0,0 @@
-/*
- * match.S -- optimized version of longest_match()
- * based on the similar work by Gilles Vollant, and Brian Raiter, written 1998
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the BSD License. Use by owners of Che Guevarra
- * parafernalia is prohibited, where possible, and highly discouraged
- * elsewhere.
- */
-
-#ifndef NO_UNDERLINE
-#	define	match_init	_match_init
-#	define	longest_match	_longest_match
-#endif
-
-#define	scanend		ebx
-#define	scanendw	bx
-#define	chainlenwmask	edx /* high word: current chain len low word: s->wmask */
-#define	curmatch	rsi
-#define	curmatchd	esi
-#define	windowbestlen	r8
-#define	scanalign	r9
-#define	scanalignd	r9d
-#define	window		r10
-#define	bestlen		r11
-#define	bestlend	r11d
-#define	scanstart	r12d
-#define	scanstartw	r12w
-#define scan		r13
-#define nicematch	r14d
-#define	limit		r15
-#define	limitd		r15d
-#define prev		rcx
-
-/*
- * The 258 is a "magic number, not a parameter -- changing it
- * breaks the hell loose
- */
-#define	MAX_MATCH	(258)
-#define	MIN_MATCH	(3)
-#define	MIN_LOOKAHEAD	(MAX_MATCH + MIN_MATCH + 1)
-#define	MAX_MATCH_8	((MAX_MATCH + 7) & ~7)
-
-/* stack frame offsets */
-#define	LocalVarsSize	(112)
-#define _chainlenwmask	( 8-LocalVarsSize)(%rsp)
-#define _windowbestlen	(16-LocalVarsSize)(%rsp)
-#define save_r14        (24-LocalVarsSize)(%rsp)
-#define save_rsi        (32-LocalVarsSize)(%rsp)
-#define save_rbx        (40-LocalVarsSize)(%rsp)
-#define save_r12        (56-LocalVarsSize)(%rsp)
-#define save_r13        (64-LocalVarsSize)(%rsp)
-#define save_r15        (80-LocalVarsSize)(%rsp)
-
-
-.globl	match_init, longest_match
-
-/*
- * On AMD64 the first argument of a function (in our case -- the pointer to
- * deflate_state structure) is passed in %rdi, hence our offsets below are
- * all off of that.
- */
-
-/* you can check the structure offset by running
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "deflate.h"
-
-void print_depl()
-{
-deflate_state ds;
-deflate_state *s=&ds;
-printf("size pointer=%u\n",(int)sizeof(void*));
-
-printf("#define dsWSize         (%3u)(%%rdi)\n",(int)(((char*)&(s->w_size))-((char*)s)));
-printf("#define dsWMask         (%3u)(%%rdi)\n",(int)(((char*)&(s->w_mask))-((char*)s)));
-printf("#define dsWindow        (%3u)(%%rdi)\n",(int)(((char*)&(s->window))-((char*)s)));
-printf("#define dsPrev          (%3u)(%%rdi)\n",(int)(((char*)&(s->prev))-((char*)s)));
-printf("#define dsMatchLen      (%3u)(%%rdi)\n",(int)(((char*)&(s->match_length))-((char*)s)));
-printf("#define dsPrevMatch     (%3u)(%%rdi)\n",(int)(((char*)&(s->prev_match))-((char*)s)));
-printf("#define dsStrStart      (%3u)(%%rdi)\n",(int)(((char*)&(s->strstart))-((char*)s)));
-printf("#define dsMatchStart    (%3u)(%%rdi)\n",(int)(((char*)&(s->match_start))-((char*)s)));
-printf("#define dsLookahead     (%3u)(%%rdi)\n",(int)(((char*)&(s->lookahead))-((char*)s)));
-printf("#define dsPrevLen       (%3u)(%%rdi)\n",(int)(((char*)&(s->prev_length))-((char*)s)));
-printf("#define dsMaxChainLen   (%3u)(%%rdi)\n",(int)(((char*)&(s->max_chain_length))-((char*)s)));
-printf("#define dsGoodMatch     (%3u)(%%rdi)\n",(int)(((char*)&(s->good_match))-((char*)s)));
-printf("#define dsNiceMatch     (%3u)(%%rdi)\n",(int)(((char*)&(s->nice_match))-((char*)s)));
-}
-
-*/
-
-
-/*
-  to compile for XCode 3.2 on MacOSX x86_64
-  - run "gcc -g -c -DXCODE_MAC_X64_STRUCTURE amd64-match.S"
- */
-
-
-#ifndef CURRENT_LINX_XCODE_MAC_X64_STRUCTURE
-#define dsWSize		( 68)(%rdi)
-#define dsWMask		( 76)(%rdi)
-#define dsWindow	( 80)(%rdi)
-#define dsPrev		( 96)(%rdi)
-#define dsMatchLen	(144)(%rdi)
-#define dsPrevMatch	(148)(%rdi)
-#define dsStrStart	(156)(%rdi)
-#define dsMatchStart	(160)(%rdi)
-#define dsLookahead	(164)(%rdi)
-#define dsPrevLen	(168)(%rdi)
-#define dsMaxChainLen	(172)(%rdi)
-#define dsGoodMatch	(188)(%rdi)
-#define dsNiceMatch	(192)(%rdi)
-
-#else 
-
-#ifndef STRUCT_OFFSET
-#	define STRUCT_OFFSET	(0)
-#endif
-
-
-#define dsWSize		( 56 + STRUCT_OFFSET)(%rdi)
-#define dsWMask		( 64 + STRUCT_OFFSET)(%rdi)
-#define dsWindow	( 72 + STRUCT_OFFSET)(%rdi)
-#define dsPrev		( 88 + STRUCT_OFFSET)(%rdi)
-#define dsMatchLen	(136 + STRUCT_OFFSET)(%rdi)
-#define dsPrevMatch	(140 + STRUCT_OFFSET)(%rdi)
-#define dsStrStart	(148 + STRUCT_OFFSET)(%rdi)
-#define dsMatchStart	(152 + STRUCT_OFFSET)(%rdi)
-#define dsLookahead	(156 + STRUCT_OFFSET)(%rdi)
-#define dsPrevLen	(160 + STRUCT_OFFSET)(%rdi)
-#define dsMaxChainLen	(164 + STRUCT_OFFSET)(%rdi)
-#define dsGoodMatch	(180 + STRUCT_OFFSET)(%rdi)
-#define dsNiceMatch	(184 + STRUCT_OFFSET)(%rdi)
-
-#endif
-
-
-
-
-.text
-
-/* uInt longest_match(deflate_state *deflatestate, IPos curmatch) */
-
-longest_match:
-/*
- * Retrieve the function arguments. %curmatch will hold cur_match
- * throughout the entire function (passed via rsi on amd64).
- * rdi will hold the pointer to the deflate_state (first arg on amd64)
- */
-		mov     %rsi, save_rsi
-		mov     %rbx, save_rbx
-		mov	%r12, save_r12
-		mov     %r13, save_r13
-		mov     %r14, save_r14
-		mov     %r15, save_r15
-
-/* uInt wmask = s->w_mask;						*/
-/* unsigned chain_length = s->max_chain_length;				*/
-/* if (s->prev_length >= s->good_match) {				*/
-/*     chain_length >>= 2;						*/
-/* }									*/
-
-		movl	dsPrevLen, %eax
-		movl	dsGoodMatch, %ebx
-		cmpl	%ebx, %eax
-		movl	dsWMask, %eax
-		movl	dsMaxChainLen, %chainlenwmask
-		jl	LastMatchGood
-		shrl	$2, %chainlenwmask
-LastMatchGood:
-
-/* chainlen is decremented once beforehand so that the function can	*/
-/* use the sign flag instead of the zero flag for the exit test.	*/
-/* It is then shifted into the high word, to make room for the wmask	*/
-/* value, which it will always accompany.				*/
-
-		decl	%chainlenwmask
-		shll	$16, %chainlenwmask
-		orl	%eax, %chainlenwmask
-
-/* if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;	*/
-
-		movl	dsNiceMatch, %eax
-		movl	dsLookahead, %ebx
-		cmpl	%eax, %ebx
-		jl	LookaheadLess
-		movl	%eax, %ebx
-LookaheadLess:	movl	%ebx, %nicematch
-
-/* register Bytef *scan = s->window + s->strstart;			*/
-
-		mov	dsWindow, %window
-		movl	dsStrStart, %limitd
-		lea	(%limit, %window), %scan
-
-/* Determine how many bytes the scan ptr is off from being		*/
-/* dword-aligned.							*/
-
-		mov	%scan, %scanalign
-		negl	%scanalignd
-		andl	$3, %scanalignd
-
-/* IPos limit = s->strstart > (IPos)MAX_DIST(s) ?			*/
-/*     s->strstart - (IPos)MAX_DIST(s) : NIL;				*/
-
-		movl	dsWSize, %eax
-		subl	$MIN_LOOKAHEAD, %eax
-		xorl	%ecx, %ecx
-		subl	%eax, %limitd
-		cmovng	%ecx, %limitd
-
-/* int best_len = s->prev_length;					*/
-
-		movl	dsPrevLen, %bestlend
-
-/* Store the sum of s->window + best_len in %windowbestlen locally, and in memory.	*/
-
-		lea	(%window, %bestlen), %windowbestlen
-		mov	%windowbestlen, _windowbestlen
-
-/* register ush scan_start = *(ushf*)scan;				*/
-/* register ush scan_end   = *(ushf*)(scan+best_len-1);			*/
-/* Posf *prev = s->prev;						*/
-
-		movzwl	(%scan), %scanstart
-		movzwl	-1(%scan, %bestlen), %scanend
-		mov	dsPrev, %prev
-
-/* Jump into the main loop.						*/
-
-		movl	%chainlenwmask, _chainlenwmask
-		jmp	LoopEntry
-
-.balign 16
-
-/* do {
- *     match = s->window + cur_match;
- *     if (*(ushf*)(match+best_len-1) != scan_end ||
- *         *(ushf*)match != scan_start) continue;
- *     [...]
- * } while ((cur_match = prev[cur_match & wmask]) > limit
- *          && --chain_length != 0);
- *
- * Here is the inner loop of the function. The function will spend the
- * majority of its time in this loop, and majority of that time will
- * be spent in the first ten instructions.
- */
-LookupLoop:
-		andl	%chainlenwmask, %curmatchd
-		movzwl	(%prev, %curmatch, 2), %curmatchd
-		cmpl	%limitd, %curmatchd
-		jbe	LeaveNow
-		subl	$0x00010000, %chainlenwmask
-		js	LeaveNow
-LoopEntry:	cmpw	-1(%windowbestlen, %curmatch), %scanendw
-		jne	LookupLoop
-		cmpw	%scanstartw, (%window, %curmatch)
-		jne	LookupLoop
-
-/* Store the current value of chainlen.					*/
-		movl	%chainlenwmask, _chainlenwmask
-
-/* %scan is the string under scrutiny, and %prev to the string we	*/
-/* are hoping to match it up with. In actuality, %esi and %edi are	*/
-/* both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and %edx is	*/
-/* initialized to -(MAX_MATCH_8 - scanalign).				*/
-
-		mov	$(-MAX_MATCH_8), %rdx
-		lea	(%curmatch, %window), %windowbestlen
-		lea	MAX_MATCH_8(%windowbestlen, %scanalign), %windowbestlen
-		lea	MAX_MATCH_8(%scan, %scanalign), %prev
-
-/* the prefetching below makes very little difference... */
-		prefetcht1	(%windowbestlen, %rdx)
-		prefetcht1	(%prev, %rdx)
-
-/*
- * Test the strings for equality, 8 bytes at a time. At the end,
- * adjust %rdx so that it is offset to the exact byte that mismatched.
- *
- * It should be confessed that this loop usually does not represent
- * much of the total running time. Replacing it with a more
- * straightforward "rep cmpsb" would not drastically degrade
- * performance -- unrolling it, for example, makes no difference.
- */
-
-#undef USE_SSE	/* works, but is 6-7% slower, than non-SSE... */
-
-LoopCmps:
-#ifdef USE_SSE
-		/* Preload the SSE registers */
-		movdqu	  (%windowbestlen, %rdx), %xmm1
-		movdqu	  (%prev, %rdx), %xmm2
-		pcmpeqb	%xmm2, %xmm1
-		movdqu	16(%windowbestlen, %rdx), %xmm3
-		movdqu	16(%prev, %rdx), %xmm4
-		pcmpeqb	%xmm4, %xmm3
-		movdqu	32(%windowbestlen, %rdx), %xmm5
-		movdqu	32(%prev, %rdx), %xmm6
-		pcmpeqb	%xmm6, %xmm5
-		movdqu	48(%windowbestlen, %rdx), %xmm7
-		movdqu	48(%prev, %rdx), %xmm8
-		pcmpeqb	%xmm8, %xmm7
-
-		/* Check the comparisions' results */
-		pmovmskb %xmm1, %rax
-		notw	%ax
-		bsfw	%ax, %ax
-		jnz	LeaveLoopCmps
-		
-		/* this is the only iteration of the loop with a possibility of having
-		   incremented rdx by 0x108 (each loop iteration add 16*4 = 0x40 
-		   and (0x40*4)+8=0x108 */
-		add	$8, %rdx
-		jz LenMaximum
-		add	$8, %rdx
-
-		
-		pmovmskb %xmm3, %rax
-		notw	%ax
-		bsfw	%ax, %ax
-		jnz	LeaveLoopCmps
-		
-		
-		add	$16, %rdx
-
-
-		pmovmskb %xmm5, %rax
-		notw	%ax
-		bsfw	%ax, %ax
-		jnz	LeaveLoopCmps
-		
-		add	$16, %rdx
-
-
-		pmovmskb %xmm7, %rax
-		notw	%ax
-		bsfw	%ax, %ax
-		jnz	LeaveLoopCmps
-		
-		add	$16, %rdx
-		
-		jmp	LoopCmps
-LeaveLoopCmps:	add	%rax, %rdx
-#else
-		mov	(%windowbestlen, %rdx), %rax
-		xor	(%prev, %rdx), %rax
-		jnz	LeaveLoopCmps
-		
-		mov	8(%windowbestlen, %rdx), %rax
-		xor	8(%prev, %rdx), %rax
-		jnz	LeaveLoopCmps8
-
-		mov	16(%windowbestlen, %rdx), %rax
-		xor	16(%prev, %rdx), %rax
-		jnz	LeaveLoopCmps16
-				
-		add	$24, %rdx
-		jnz	LoopCmps
-		jmp	LenMaximum
-#	if 0
-/*
- * This three-liner is tantalizingly simple, but bsf is a slow instruction,
- * and the complicated alternative down below is quite a bit faster. Sad...
- */
-
-LeaveLoopCmps:	bsf	%rax, %rax /* find the first non-zero bit */
-		shrl	$3, %eax /* divide by 8 to get the byte */
-		add	%rax, %rdx
-#	else
-LeaveLoopCmps16:
-		add	$8, %rdx
-LeaveLoopCmps8:
-		add	$8, %rdx
-LeaveLoopCmps:	testl   $0xFFFFFFFF, %eax /* Check the first 4 bytes */
-		jnz     Check16
-		add     $4, %rdx
-		shr     $32, %rax
-Check16:        testw   $0xFFFF, %ax
-		jnz     LenLower
-		add	$2, %rdx
-		shrl	$16, %eax
-LenLower:	subb	$1, %al
-		adc	$0, %rdx
-#	endif
-#endif
-
-/* Calculate the length of the match. If it is longer than MAX_MATCH,	*/
-/* then automatically accept it as the best possible match and leave.	*/
-
-		lea	(%prev, %rdx), %rax
-		sub	%scan, %rax
-		cmpl	$MAX_MATCH, %eax
-		jge	LenMaximum
-
-/* If the length of the match is not longer than the best match we	*/
-/* have so far, then forget it and return to the lookup loop.		*/
-
-		cmpl	%bestlend, %eax
-		jg	LongerMatch
-		mov	_windowbestlen, %windowbestlen
-		mov	dsPrev, %prev
-		movl	_chainlenwmask, %edx
-		jmp	LookupLoop
-
-/*         s->match_start = cur_match;					*/
-/*         best_len = len;						*/
-/*         if (len >= nice_match) break;				*/
-/*         scan_end = *(ushf*)(scan+best_len-1);			*/
-
-LongerMatch:
-		movl	%eax, %bestlend
-		movl	%curmatchd, dsMatchStart
-		cmpl	%nicematch, %eax
-		jge	LeaveNow
-
-		lea	(%window, %bestlen), %windowbestlen
-		mov	%windowbestlen, _windowbestlen
-
-		movzwl	-1(%scan, %rax), %scanend
-		mov	dsPrev, %prev
-		movl	_chainlenwmask, %chainlenwmask
-		jmp	LookupLoop
-
-/* Accept the current string, with the maximum possible length.		*/
-
-LenMaximum:
-		movl	$MAX_MATCH, %bestlend
-		movl	%curmatchd, dsMatchStart
-
-/* if ((uInt)best_len <= s->lookahead) return (uInt)best_len;		*/
-/* return s->lookahead;							*/
-
-LeaveNow:
-		movl	dsLookahead, %eax
-		cmpl	%eax, %bestlend
-		cmovngl	%bestlend, %eax
-LookaheadRet:
-
-/* Restore the registers and return from whence we came.			*/
-
-	mov	save_rsi, %rsi
-	mov	save_rbx, %rbx
-	mov	save_r12, %r12
-	mov	save_r13, %r13
-	mov	save_r14, %r14
-	mov	save_r15, %r15
-
-	ret
-
-match_init:	ret
@@ -1,51 +0,0 @@
-This is a patched version of zlib, modified to use
-Pentium-Pro-optimized assembly code in the deflation algorithm. The
-files changed/added by this patch are:
-
-README.686
-match.S
-
-The speedup that this patch provides varies, depending on whether the
-compiler used to build the original version of zlib falls afoul of the
-PPro's speed traps. My own tests show a speedup of around 10-20% at
-the default compression level, and 20-30% using -9, against a version
-compiled using gcc 2.7.2.3. Your mileage may vary.
-
-Note that this code has been tailored for the PPro/PII in particular,
-and will not perform particuarly well on a Pentium.
-
-If you are using an assembler other than GNU as, you will have to
-translate match.S to use your assembler's syntax. (Have fun.)
-
-Brian Raiter
-breadbox@muppetlabs.com
-April, 1998
-
-
-Added for zlib 1.1.3:
-
-The patches come from
-http://www.muppetlabs.com/~breadbox/software/assembly.html
-
-To compile zlib with this asm file, copy match.S to the zlib directory
-then do:
-
-CFLAGS="-O3 -DASMV" ./configure
-make OBJA=match.o
-
-
-Update:
-
-I've been ignoring these assembly routines for years, believing that
-gcc's generated code had caught up with it sometime around gcc 2.95
-and the major rearchitecting of the Pentium 4. However, I recently
-learned that, despite what I believed, this code still has some life
-in it. On the Pentium 4 and AMD64 chips, it continues to run about 8%
-faster than the code produced by gcc 4.1.
-
-In acknowledgement of its continuing usefulness, I've altered the
-license to match that of the rest of zlib. Share and Enjoy!
-
-Brian Raiter
-breadbox@muppetlabs.com
-April, 2007
@@ -57,7 +57,7 @@ int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow,
 * use by the application to pass an input descriptor to infun(), if desired.
 *
 * If left and in are not NULL and *left is not zero when blast() is called,
- * then the *left bytes are *in are consumed for input before infun() is used.
+ * then the *left bytes at *in are consumed for input before infun() is used.
 *
 * The output function is invoked: err = outfun(how, buf, len), where the bytes
 * to be written are buf[0..len-1].  If err is not zero, then blast() returns
@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
  const OutBuf: Pointer; BufSize: Integer);

 const
-  zlib_version = '1.2.11';
+  zlib_version = '1.2.12';

 type
  EZlibError = class(Exception);
@@ -156,7 +156,7 @@ namespace DotZLibTests
        public void Info_Version()
        {
            Info info = new Info();
-            Assert.AreEqual("1.2.11", Info.Version);
+            Assert.AreEqual("1.2.12", Info.Version);
            Assert.AreEqual(32, info.SizeOfUInt);
            Assert.AreEqual(32, info.SizeOfULong);
            Assert.AreEqual(32, info.SizeOfPointer);
@@ -1,5 +1,5 @@
 /* inftree9.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2017 Mark Adler
+ * Copyright (C) 1995-2022 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 1.2.11 Copyright 1995-2017 Mark Adler ";
+   " inflate9 1.2.12 Copyright 1995-2022 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, 202};
+        133, 133, 133, 133, 144, 199, 202};
    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,
@@ -1,2 +0,0 @@
-ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
-ml64.exe /Flgvmat64   /c /Zi gvmat64.asm
@@ -1,553 +0,0 @@
-;uInt longest_match_x64(
-;    deflate_state *s,
-;    IPos cur_match);                             /* current match */
-
-; gvmat64.asm -- Asm portion of the optimized longest_match for 32 bits x86_64
-;  (AMD64 on Athlon 64, Opteron, Phenom
-;     and Intel EM64T on Pentium 4 with EM64T, Pentium D, Core 2 Duo, Core I5/I7)
-; Copyright (C) 1995-2010 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
-;
-; File written by Gilles Vollant, by converting to assembly the longest_match
-;  from Jean-loup Gailly in deflate.c of zLib and infoZip zip.
-;
-;  and by taking inspiration on asm686 with masm, optimised assembly code
-;        from Brian Raiter, written 1998
-;
-;  This software is provided 'as-is', without any express or implied
-;  warranty.  In no event will the authors be held liable for any damages
-;  arising from the use of this software.
-;
-;  Permission is granted to anyone to use this software for any purpose,
-;  including commercial applications, and to alter it and redistribute it
-;  freely, subject to the following restrictions:
-;
-;  1. The origin of this software must not be misrepresented; you must not
-;     claim that you wrote the original software. If you use this software
-;     in a product, an acknowledgment in the product documentation would be
-;     appreciated but is not required.
-;  2. Altered source versions must be plainly marked as such, and must not be
-;     misrepresented as being the original software
-;  3. This notice may not be removed or altered from any source distribution.
-;
-;
-;
-;         http://www.zlib.net
-;         http://www.winimage.com/zLibDll
-;         http://www.muppetlabs.com/~breadbox/software/assembly.html
-;
-; to compile this file for infozip Zip, I use option:
-;   ml64.exe /Flgvmat64 /c /Zi /DINFOZIP gvmat64.asm
-;
-; to compile this file for zLib, I use option:
-;   ml64.exe /Flgvmat64 /c /Zi gvmat64.asm
-; Be carrefull to adapt zlib1222add below to your version of zLib
-;   (if you use a version of zLib before 1.0.4 or after 1.2.2.2, change
-;    value of zlib1222add later)
-;
-; This file compile with Microsoft Macro Assembler (x64) for AMD64
-;
-;   ml64.exe is given with Visual Studio 2005/2008/2010 and Windows WDK
-;
-;   (you can get Windows WDK with ml64 for AMD64 from
-;      http://www.microsoft.com/whdc/Devtools/wdk/default.mspx for low price)
-;
-
-
-;uInt longest_match(s, cur_match)
-;    deflate_state *s;
-;    IPos cur_match;                             /* current match */
-.code
-longest_match PROC
-
-
-;LocalVarsSize   equ 88
- LocalVarsSize   equ 72
-
-; register used : rax,rbx,rcx,rdx,rsi,rdi,r8,r9,r10,r11,r12
-; free register :  r14,r15
-; register can be saved : rsp
-
- chainlenwmask   equ  rsp + 8 - LocalVarsSize    ; high word: current chain len
-                                                 ; low word: s->wmask
-;window          equ  rsp + xx - LocalVarsSize   ; local copy of s->window ; stored in r10
-;windowbestlen   equ  rsp + xx - LocalVarsSize   ; s->window + bestlen , use r10+r11
-;scanstart       equ  rsp + xx - LocalVarsSize   ; first two bytes of string ; stored in r12w
-;scanend         equ  rsp + xx - LocalVarsSize   ; last two bytes of string use ebx
-;scanalign       equ  rsp + xx - LocalVarsSize   ; dword-misalignment of string r13
-;bestlen         equ  rsp + xx - LocalVarsSize   ; size of best match so far -> r11d
-;scan            equ  rsp + xx - LocalVarsSize   ; ptr to string wanting match -> r9
-IFDEF INFOZIP
-ELSE
- nicematch       equ  (rsp + 16 - LocalVarsSize) ; a good enough match size
-ENDIF
-
-save_rdi        equ  rsp + 24 - LocalVarsSize
-save_rsi        equ  rsp + 32 - LocalVarsSize
-save_rbx        equ  rsp + 40 - LocalVarsSize
-save_rbp        equ  rsp + 48 - LocalVarsSize
-save_r12        equ  rsp + 56 - LocalVarsSize
-save_r13        equ  rsp + 64 - LocalVarsSize
-;save_r14        equ  rsp + 72 - LocalVarsSize
-;save_r15        equ  rsp + 80 - LocalVarsSize
-
-
-; summary of register usage
-; scanend     ebx
-; scanendw    bx
-; chainlenwmask   edx
-; curmatch    rsi
-; curmatchd   esi
-; windowbestlen   r8
-; scanalign   r9
-; scanalignd  r9d
-; window      r10
-; bestlen     r11
-; bestlend    r11d
-; scanstart   r12d
-; scanstartw  r12w
-; scan        r13
-; nicematch   r14d
-; limit       r15
-; limitd      r15d
-; prev        rcx
-
-;  all the +4 offsets are due to the addition of pending_buf_size (in zlib
-;  in the deflate_state structure since the asm code was first written
-;  (if you compile with zlib 1.0.4 or older, remove the +4).
-;  Note : these value are good with a 8 bytes boundary pack structure
-
-
-    MAX_MATCH           equ     258
-    MIN_MATCH           equ     3
-    MIN_LOOKAHEAD       equ     (MAX_MATCH+MIN_MATCH+1)
-
-
-;;; Offsets for fields in the deflate_state structure. These numbers
-;;; are calculated from the definition of deflate_state, with the
-;;; assumption that the compiler will dword-align the fields. (Thus,
-;;; changing the definition of deflate_state could easily cause this
-;;; program to crash horribly, without so much as a warning at
-;;; compile time. Sigh.)
-
-;  all the +zlib1222add offsets are due to the addition of fields
-;  in zlib in the deflate_state structure since the asm code was first written
-;  (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
-;  (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
-;  if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
-
-
-IFDEF INFOZIP
-
-_DATA   SEGMENT
-COMM    window_size:DWORD
-; WMask ; 7fff
-COMM    window:BYTE:010040H
-COMM    prev:WORD:08000H
-; MatchLen : unused
-; PrevMatch : unused
-COMM    strstart:DWORD
-COMM    match_start:DWORD
-; Lookahead : ignore
-COMM    prev_length:DWORD ; PrevLen
-COMM    max_chain_length:DWORD
-COMM    good_match:DWORD
-COMM    nice_match:DWORD
-prev_ad equ OFFSET prev
-window_ad equ OFFSET window
-nicematch equ nice_match
-_DATA ENDS
-WMask equ 07fffh
-
-ELSE
-
-  IFNDEF zlib1222add
-    zlib1222add equ 8
-  ENDIF
-dsWSize         equ 56+zlib1222add+(zlib1222add/2)
-dsWMask         equ 64+zlib1222add+(zlib1222add/2)
-dsWindow        equ 72+zlib1222add
-dsPrev          equ 88+zlib1222add
-dsMatchLen      equ 128+zlib1222add
-dsPrevMatch     equ 132+zlib1222add
-dsStrStart      equ 140+zlib1222add
-dsMatchStart    equ 144+zlib1222add
-dsLookahead     equ 148+zlib1222add
-dsPrevLen       equ 152+zlib1222add
-dsMaxChainLen   equ 156+zlib1222add
-dsGoodMatch     equ 172+zlib1222add
-dsNiceMatch     equ 176+zlib1222add
-
-window_size     equ [ rcx + dsWSize]
-WMask           equ [ rcx + dsWMask]
-window_ad       equ [ rcx + dsWindow]
-prev_ad         equ [ rcx + dsPrev]
-strstart        equ [ rcx + dsStrStart]
-match_start     equ [ rcx + dsMatchStart]
-Lookahead       equ [ rcx + dsLookahead] ; 0ffffffffh on infozip
-prev_length     equ [ rcx + dsPrevLen]
-max_chain_length equ [ rcx + dsMaxChainLen]
-good_match      equ [ rcx + dsGoodMatch]
-nice_match      equ [ rcx + dsNiceMatch]
-ENDIF
-
-; parameter 1 in r8(deflate state s), param 2 in rdx (cur match)
-
-; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
-; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
-;
-; All registers must be preserved across the call, except for
-;   rax, rcx, rdx, r8, r9, r10, and r11, which are scratch.
-
-
-
-;;; Save registers that the compiler may be using, and adjust esp to
-;;; make room for our stack frame.
-
-
-;;; Retrieve the function arguments. r8d will hold cur_match
-;;; throughout the entire function. edx will hold the pointer to the
-;;; deflate_state structure during the function's setup (before
-;;; entering the main loop.
-
-; parameter 1 in rcx (deflate_state* s), param 2 in edx -> r8 (cur match)
-
-; this clear high 32 bits of r8, which can be garbage in both r8 and rdx
-
-        mov [save_rdi],rdi
-        mov [save_rsi],rsi
-        mov [save_rbx],rbx
-        mov [save_rbp],rbp
-IFDEF INFOZIP
-        mov r8d,ecx
-ELSE
-        mov r8d,edx
-ENDIF
-        mov [save_r12],r12
-        mov [save_r13],r13
-;        mov [save_r14],r14
-;        mov [save_r15],r15
-
-
-;;; uInt wmask = s->w_mask;
-;;; unsigned chain_length = s->max_chain_length;
-;;; if (s->prev_length >= s->good_match) {
-;;;     chain_length >>= 2;
-;;; }
-
-        mov edi, prev_length
-        mov esi, good_match
-        mov eax, WMask
-        mov ebx, max_chain_length
-        cmp edi, esi
-        jl  LastMatchGood
-        shr ebx, 2
-LastMatchGood:
-
-;;; chainlen is decremented once beforehand so that the function can
-;;; use the sign flag instead of the zero flag for the exit test.
-;;; It is then shifted into the high word, to make room for the wmask
-;;; value, which it will always accompany.
-
-        dec ebx
-        shl ebx, 16
-        or  ebx, eax
-
-;;; on zlib only
-;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-
-IFDEF INFOZIP
-        mov [chainlenwmask], ebx
-; on infozip nice_match = [nice_match]
-ELSE
-        mov eax, nice_match
-        mov [chainlenwmask], ebx
-        mov r10d, Lookahead
-        cmp r10d, eax
-        cmovnl r10d, eax
-        mov [nicematch],r10d
-ENDIF
-
-;;; register Bytef *scan = s->window + s->strstart;
-        mov r10, window_ad
-        mov ebp, strstart
-        lea r13, [r10 + rbp]
-
-;;; Determine how many bytes the scan ptr is off from being
-;;; dword-aligned.
-
-         mov r9,r13
-         neg r13
-         and r13,3
-
-;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
-;;;     s->strstart - (IPos)MAX_DIST(s) : NIL;
-IFDEF INFOZIP
-        mov eax,07efah ; MAX_DIST = (WSIZE-MIN_LOOKAHEAD) (0x8000-(3+8+1))
-ELSE
-        mov eax, window_size
-        sub eax, MIN_LOOKAHEAD
-ENDIF
-        xor edi,edi
-        sub ebp, eax
-
-        mov r11d, prev_length
-
-        cmovng ebp,edi
-
-;;; int best_len = s->prev_length;
-
-
-;;; Store the sum of s->window + best_len in esi locally, and in esi.
-
-       lea  rsi,[r10+r11]
-
-;;; register ush scan_start = *(ushf*)scan;
-;;; register ush scan_end   = *(ushf*)(scan+best_len-1);
-;;; Posf *prev = s->prev;
-
-        movzx r12d,word ptr [r9]
-        movzx ebx, word ptr [r9 + r11 - 1]
-
-        mov rdi, prev_ad
-
-;;; Jump into the main loop.
-
-        mov edx, [chainlenwmask]
-
-        cmp bx,word ptr [rsi + r8 - 1]
-        jz  LookupLoopIsZero
-
-LookupLoop1:
-        and r8d, edx
-
-        movzx   r8d, word ptr [rdi + r8*2]
-        cmp r8d, ebp
-        jbe LeaveNow
-        sub edx, 00010000h
-        js  LeaveNow
-
-LoopEntry1:
-        cmp bx,word ptr [rsi + r8 - 1]
-        jz  LookupLoopIsZero
-
-LookupLoop2:
-        and r8d, edx
-
-        movzx   r8d, word ptr [rdi + r8*2]
-        cmp r8d, ebp
-        jbe LeaveNow
-        sub edx, 00010000h
-        js  LeaveNow
-
-LoopEntry2:
-        cmp bx,word ptr [rsi + r8 - 1]
-        jz  LookupLoopIsZero
-
-LookupLoop4:
-        and r8d, edx
-
-        movzx   r8d, word ptr [rdi + r8*2]
-        cmp r8d, ebp
-        jbe LeaveNow
-        sub edx, 00010000h
-        js  LeaveNow
-
-LoopEntry4:
-
-        cmp bx,word ptr [rsi + r8 - 1]
-        jnz LookupLoop1
-        jmp LookupLoopIsZero
-
-
-;;; do {
-;;;     match = s->window + cur_match;
-;;;     if (*(ushf*)(match+best_len-1) != scan_end ||
-;;;         *(ushf*)match != scan_start) continue;
-;;;     [...]
-;;; } while ((cur_match = prev[cur_match & wmask]) > limit
-;;;          && --chain_length != 0);
-;;;
-;;; Here is the inner loop of the function. The function will spend the
-;;; majority of its time in this loop, and majority of that time will
-;;; be spent in the first ten instructions.
-;;;
-;;; Within this loop:
-;;; ebx = scanend
-;;; r8d = curmatch
-;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
-;;; esi = windowbestlen - i.e., (window + bestlen)
-;;; edi = prev
-;;; ebp = limit
-
-LookupLoop:
-        and r8d, edx
-
-        movzx   r8d, word ptr [rdi + r8*2]
-        cmp r8d, ebp
-        jbe LeaveNow
-        sub edx, 00010000h
-        js  LeaveNow
-
-LoopEntry:
-
-        cmp bx,word ptr [rsi + r8 - 1]
-        jnz LookupLoop1
-LookupLoopIsZero:
-        cmp     r12w, word ptr [r10 + r8]
-        jnz LookupLoop1
-
-
-;;; Store the current value of chainlen.
-        mov [chainlenwmask], edx
-
-;;; Point edi to the string under scrutiny, and esi to the string we
-;;; are hoping to match it up with. In actuality, esi and edi are
-;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
-;;; initialized to -(MAX_MATCH_8 - scanalign).
-
-        lea rsi,[r8+r10]
-        mov rdx, 0fffffffffffffef8h; -(MAX_MATCH_8)
-        lea rsi, [rsi + r13 + 0108h] ;MAX_MATCH_8]
-        lea rdi, [r9 + r13 + 0108h] ;MAX_MATCH_8]
-
-        prefetcht1 [rsi+rdx]
-        prefetcht1 [rdi+rdx]
-
-
-;;; Test the strings for equality, 8 bytes at a time. At the end,
-;;; adjust rdx so that it is offset to the exact byte that mismatched.
-;;;
-;;; We already know at this point that the first three bytes of the
-;;; strings match each other, and they can be safely passed over before
-;;; starting the compare loop. So what this code does is skip over 0-3
-;;; bytes, as much as necessary in order to dword-align the edi
-;;; pointer. (rsi will still be misaligned three times out of four.)
-;;;
-;;; It should be confessed that this loop usually does not represent
-;;; much of the total running time. Replacing it with a more
-;;; straightforward "rep cmpsb" would not drastically degrade
-;;; performance.
-
-
-LoopCmps:
-        mov rax, [rsi + rdx]
-        xor rax, [rdi + rdx]
-        jnz LeaveLoopCmps
-
-        mov rax, [rsi + rdx + 8]
-        xor rax, [rdi + rdx + 8]
-        jnz LeaveLoopCmps8
-
-
-        mov rax, [rsi + rdx + 8+8]
-        xor rax, [rdi + rdx + 8+8]
-        jnz LeaveLoopCmps16
-
-        add rdx,8+8+8
-
-        jnz short LoopCmps
-        jmp short LenMaximum
-LeaveLoopCmps16: add rdx,8
-LeaveLoopCmps8: add rdx,8
-LeaveLoopCmps:
-
-        test    eax, 0000FFFFh
-        jnz LenLower
-
-        test eax,0ffffffffh
-
-        jnz LenLower32
-
-        add rdx,4
-        shr rax,32
-        or ax,ax
-        jnz LenLower
-
-LenLower32:
-        shr eax,16
-        add rdx,2
-LenLower:   sub al, 1
-        adc rdx, 0
-;;; Calculate the length of the match. If it is longer than MAX_MATCH,
-;;; then automatically accept it as the best possible match and leave.
-
-        lea rax, [rdi + rdx]
-        sub rax, r9
-        cmp eax, MAX_MATCH
-        jge LenMaximum
-
-;;; If the length of the match is not longer than the best match we
-;;; have so far, then forget it and return to the lookup loop.
-;///////////////////////////////////
-
-        cmp eax, r11d
-        jg  LongerMatch
-
-        lea rsi,[r10+r11]
-
-        mov rdi, prev_ad
-        mov edx, [chainlenwmask]
-        jmp LookupLoop
-
-;;;         s->match_start = cur_match;
-;;;         best_len = len;
-;;;         if (len >= nice_match) break;
-;;;         scan_end = *(ushf*)(scan+best_len-1);
-
-LongerMatch:
-        mov r11d, eax
-        mov match_start, r8d
-        cmp eax, [nicematch]
-        jge LeaveNow
-
-        lea rsi,[r10+rax]
-
-        movzx   ebx, word ptr [r9 + rax - 1]
-        mov rdi, prev_ad
-        mov edx, [chainlenwmask]
-        jmp LookupLoop
-
-;;; Accept the current string, with the maximum possible length.
-
-LenMaximum:
-        mov r11d,MAX_MATCH
-        mov match_start, r8d
-
-;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
-;;; return s->lookahead;
-
-LeaveNow:
-IFDEF INFOZIP
-        mov eax,r11d
-ELSE
-        mov eax, Lookahead
-        cmp r11d, eax
-        cmovng eax, r11d
-ENDIF
-
-;;; Restore the stack and return from whence we came.
-
-
-        mov rsi,[save_rsi]
-        mov rdi,[save_rdi]
-        mov rbx,[save_rbx]
-        mov rbp,[save_rbp]
-        mov r12,[save_r12]
-        mov r13,[save_r13]
-;        mov r14,[save_r14]
-;        mov r15,[save_r15]
-
-
-        ret 0
-; please don't remove this string !
-; Your can freely use gvmat64 in any free or commercial app
-; but it is far better don't remove the string in the binary!
-    db     0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998, converted to amd 64 by Gilles Vollant 2005",0dh,0ah,0
-longest_match   ENDP
-
-match_init PROC
-  ret 0
-match_init ENDP
-
-
-END
@@ -1,186 +0,0 @@
-/* inffas8664.c is a hand tuned assembler version of inffast.c - fast decoding
- * version for AMD64 on Windows using Microsoft C compiler
- *
- * Copyright (C) 1995-2003 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- * Copyright (C) 2003 Chris Anderson <christop@charm.net>
- * Please use the copyright conditions above.
- *
- * 2005 - Adaptation to Microsoft C Compiler for AMD64 by Gilles Vollant
- *
- * inffas8664.c call function inffas8664fnc in inffasx64.asm
- *  inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
- *
- * Dec-29-2003 -- I added AMD64 inflate asm support.  This version is also
- * slightly quicker on x86 systems because, instead of using rep movsb to copy
- * data, it uses rep movsw, which moves data in 2-byte chunks instead of single
- * bytes.  I've tested the AMD64 code on a Fedora Core 1 + the x86_64 updates
- * from http://fedora.linux.duke.edu/fc1_x86_64
- * which is running on an Athlon 64 3000+ / Gigabyte GA-K8VT800M system with
- * 1GB ram.  The 64-bit version is about 4% faster than the 32-bit version,
- * when decompressing mozilla-source-1.3.tar.gz.
- *
- * Mar-13-2003 -- Most of this is derived from inffast.S which is derived from
- * the gcc -S output of zlib-1.2.0/inffast.c.  Zlib-1.2.0 is in beta release at
- * the moment.  I have successfully compiled and tested this code with gcc2.96,
- * gcc3.2, icc5.0, msvc6.0.  It is very close to the speed of inffast.S
- * compiled with gcc -DNO_MMX, but inffast.S is still faster on the P3 with MMX
- * enabled.  I will attempt to merge the MMX code into this version.  Newer
- * versions of this and inffast.S can be found at
- * http://www.eetbeetee.com/zlib/ and http://www.charm.net/~christop/zlib/
- *
- */
-
-#include <stdio.h>
-#include "zutil.h"
-#include "inftrees.h"
-#include "inflate.h"
-#include "inffast.h"
-
-/* Mark Adler's comments from inffast.c: */
-
-/*
-   Decode literal, length, and distance codes and write out the resulting
-   literal and match bytes until either not enough input or output is
-   available, an end-of-block is encountered, or a data error is encountered.
-   When large enough input and output buffers are supplied to inflate(), for
-   example, a 16K input buffer and a 64K output buffer, more than 95% of the
-   inflate execution time is spent in this routine.
-
-   Entry assumptions:
-
-        state->mode == LEN
-        strm->avail_in >= 6
-        strm->avail_out >= 258
-        start >= strm->avail_out
-        state->bits < 8
-
-   On return, state->mode is one of:
-
-        LEN -- ran out of enough output space or enough available input
-        TYPE -- reached end of block code, inflate() to interpret next block
-        BAD -- error in block data
-
-   Notes:
-
-    - The maximum input bits used by a length/distance pair is 15 bits for the
-      length code, 5 bits for the length extra, 15 bits for the distance code,
-      and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
-      Therefore if strm->avail_in >= 6, then there is enough input to avoid
-      checking for available input while decoding.
-
-    - The maximum bytes that a single length/distance pair can output is 258
-      bytes, which is the maximum length that can be coded.  inflate_fast()
-      requires strm->avail_out >= 258 for each loop to avoid checking for
-      output space.
- */
-
-
-
-    typedef struct inffast_ar {
-/* 64   32                               x86  x86_64 */
-/* ar offset                              register */
-/*  0    0 */ void *esp;                /* esp save */
-/*  8    4 */ void *ebp;                /* ebp save */
-/* 16    8 */ unsigned char FAR *in;    /* esi rsi  local strm->next_in */
-/* 24   12 */ unsigned char FAR *last;  /*     r9   while in < last */
-/* 32   16 */ unsigned char FAR *out;   /* edi rdi  local strm->next_out */
-/* 40   20 */ unsigned char FAR *beg;   /*          inflate()'s init next_out */
-/* 48   24 */ unsigned char FAR *end;   /*     r10  while out < end */
-/* 56   28 */ unsigned char FAR *window;/*          size of window, wsize!=0 */
-/* 64   32 */ code const FAR *lcode;    /* ebp rbp  local strm->lencode */
-/* 72   36 */ code const FAR *dcode;    /*     r11  local strm->distcode */
-/* 80   40 */ size_t /*unsigned long */hold;       /* edx rdx  local strm->hold */
-/* 88   44 */ unsigned bits;            /* ebx rbx  local strm->bits */
-/* 92   48 */ unsigned wsize;           /*          window size */
-/* 96   52 */ unsigned write;           /*          window write index */
-/*100   56 */ unsigned lmask;           /*     r12  mask for lcode */
-/*104   60 */ unsigned dmask;           /*     r13  mask for dcode */
-/*108   64 */ unsigned len;             /*     r14  match length */
-/*112   68 */ unsigned dist;            /*     r15  match distance */
-/*116   72 */ unsigned status;          /*          set when state chng*/
-    } type_ar;
-#ifdef ASMINF
-
-void inflate_fast(strm, start)
-z_streamp strm;
-unsigned start;         /* inflate()'s starting value for strm->avail_out */
-{
-    struct inflate_state FAR *state;
-    type_ar ar;
-    void inffas8664fnc(struct inffast_ar * par);
-
-
-
-#if (defined( __GNUC__ ) && defined( __amd64__ ) && ! defined( __i386 )) || (defined(_MSC_VER) && defined(_M_AMD64))
-#define PAD_AVAIL_IN 6
-#define PAD_AVAIL_OUT 258
-#else
-#define PAD_AVAIL_IN 5
-#define PAD_AVAIL_OUT 257
-#endif
-
-    /* copy state to local variables */
-    state = (struct inflate_state FAR *)strm->state;
-
-    ar.in = strm->next_in;
-    ar.last = ar.in + (strm->avail_in - PAD_AVAIL_IN);
-    ar.out = strm->next_out;
-    ar.beg = ar.out - (start - strm->avail_out);
-    ar.end = ar.out + (strm->avail_out - PAD_AVAIL_OUT);
-    ar.wsize = state->wsize;
-    ar.write = state->wnext;
-    ar.window = state->window;
-    ar.hold = state->hold;
-    ar.bits = state->bits;
-    ar.lcode = state->lencode;
-    ar.dcode = state->distcode;
-    ar.lmask = (1U << state->lenbits) - 1;
-    ar.dmask = (1U << state->distbits) - 1;
-
-    /* decode literals and length/distances until end-of-block or not enough
-       input data or output space */
-
-    /* align in on 1/2 hold size boundary */
-    while (((size_t)(void *)ar.in & (sizeof(ar.hold) / 2 - 1)) != 0) {
-        ar.hold += (unsigned long)*ar.in++ << ar.bits;
-        ar.bits += 8;
-    }
-
-    inffas8664fnc(&ar);
-
-    if (ar.status > 1) {
-        if (ar.status == 2)
-            strm->msg = "invalid literal/length code";
-        else if (ar.status == 3)
-            strm->msg = "invalid distance code";
-        else
-            strm->msg = "invalid distance too far back";
-        state->mode = BAD;
-    }
-    else if ( ar.status == 1 ) {
-        state->mode = TYPE;
-    }
-
-    /* return unused bytes (on entry, bits < 8, so in won't go too far back) */
-    ar.len = ar.bits >> 3;
-    ar.in -= ar.len;
-    ar.bits -= ar.len << 3;
-    ar.hold &= (1U << ar.bits) - 1;
-
-    /* update state and return */
-    strm->next_in = ar.in;
-    strm->next_out = ar.out;
-    strm->avail_in = (unsigned)(ar.in < ar.last ?
-                                PAD_AVAIL_IN + (ar.last - ar.in) :
-                                PAD_AVAIL_IN - (ar.in - ar.last));
-    strm->avail_out = (unsigned)(ar.out < ar.end ?
-                                 PAD_AVAIL_OUT + (ar.end - ar.out) :
-                                 PAD_AVAIL_OUT - (ar.out - ar.end));
-    state->hold = (unsigned long)ar.hold;
-    state->bits = ar.bits;
-    return;
-}
-
-#endif
@@ -1,396 +0,0 @@
-; inffasx64.asm is a hand tuned assembler version of inffast.c - fast decoding
-; version for AMD64 on Windows using Microsoft C compiler
-;
-; inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
-; inffasx64.asm is called by inffas8664.c, which contain more info.
-
-
-; to compile this file, I use option
-;   ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
-;   with Microsoft Macro Assembler (x64) for AMD64
-;
-
-; This file compile with Microsoft Macro Assembler (x64) for AMD64
-;
-;   ml64.exe is given with Visual Studio 2005/2008/2010 and Windows WDK
-;
-;   (you can get Windows WDK with ml64 for AMD64 from
-;      http://www.microsoft.com/whdc/Devtools/wdk/default.mspx for low price)
-;
-
-
-.code
-inffas8664fnc PROC
-
-; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
-; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
-;
-; All registers must be preserved across the call, except for
-;   rax, rcx, rdx, r8, r-9, r10, and r11, which are scratch.
-
-
-	mov [rsp-8],rsi
-	mov [rsp-16],rdi
-	mov [rsp-24],r12
-	mov [rsp-32],r13
-	mov [rsp-40],r14
-	mov [rsp-48],r15
-	mov [rsp-56],rbx
-
-	mov rax,rcx
-
-	mov	[rax+8], rbp       ; /* save regs rbp and rsp */
-	mov	[rax], rsp
-
-	mov	rsp, rax          ; /* make rsp point to &ar */
-
-	mov	rsi, [rsp+16]      ; /* rsi  = in */
-	mov	rdi, [rsp+32]      ; /* rdi  = out */
-	mov	r9, [rsp+24]       ; /* r9   = last */
-	mov	r10, [rsp+48]      ; /* r10  = end */
-	mov	rbp, [rsp+64]      ; /* rbp  = lcode */
-	mov	r11, [rsp+72]      ; /* r11  = dcode */
-	mov	rdx, [rsp+80]      ; /* rdx  = hold */
-	mov	ebx, [rsp+88]      ; /* ebx  = bits */
-	mov	r12d, [rsp+100]    ; /* r12d = lmask */
-	mov	r13d, [rsp+104]    ; /* r13d = dmask */
-                                          ; /* r14d = len */
-                                          ; /* r15d = dist */
-
-
-	cld
-	cmp	r10, rdi
-	je	L_one_time           ; /* if only one decode left */
-	cmp	r9, rsi
-
-    jne L_do_loop
-
-
-L_one_time:
-	mov	r8, r12           ; /* r8 = lmask */
-	cmp	bl, 32
-	ja	L_get_length_code_one_time
-
-	lodsd                         ; /* eax = *(uint *)in++ */
-	mov	cl, bl            ; /* cl = bits, needs it for shifting */
-	add	bl, 32             ; /* bits += 32 */
-	shl	rax, cl
-	or	rdx, rax          ; /* hold |= *((uint *)in)++ << bits */
-	jmp	L_get_length_code_one_time
-
-ALIGN 4
-L_while_test:
-	cmp	r10, rdi
-	jbe	L_break_loop
-	cmp	r9, rsi
-	jbe	L_break_loop
-
-L_do_loop:
-	mov	r8, r12           ; /* r8 = lmask */
-	cmp	bl, 32
-	ja	L_get_length_code    ; /* if (32 < bits) */
-
-	lodsd                         ; /* eax = *(uint *)in++ */
-	mov	cl, bl            ; /* cl = bits, needs it for shifting */
-	add	bl, 32             ; /* bits += 32 */
-	shl	rax, cl
-	or	rdx, rax          ; /* hold |= *((uint *)in)++ << bits */
-
-L_get_length_code:
-	and	r8, rdx            ; /* r8 &= hold */
-	mov	eax, [rbp+r8*4]  ; /* eax = lcode[hold & lmask] */
-
-	mov	cl, ah            ; /* cl = this.bits */
-	sub	bl, ah            ; /* bits -= this.bits */
-	shr	rdx, cl           ; /* hold >>= this.bits */
-
-	test	al, al
-	jnz	L_test_for_length_base ; /* if (op != 0) 45.7% */
-
-	mov	r8, r12            ; /* r8 = lmask */
-	shr	eax, 16            ; /* output this.val char */
-	stosb
-
-L_get_length_code_one_time:
-	and	r8, rdx            ; /* r8 &= hold */
-	mov	eax, [rbp+r8*4] ; /* eax = lcode[hold & lmask] */
-
-L_dolen:
-	mov	cl, ah            ; /* cl = this.bits */
-	sub	bl, ah            ; /* bits -= this.bits */
-	shr	rdx, cl           ; /* hold >>= this.bits */
-
-	test	al, al
-	jnz	L_test_for_length_base ; /* if (op != 0) 45.7% */
-
-	shr	eax, 16            ; /* output this.val char */
-	stosb
-	jmp	L_while_test
-
-ALIGN 4
-L_test_for_length_base:
-	mov	r14d, eax         ; /* len = this */
-	shr	r14d, 16           ; /* len = this.val */
-	mov	cl, al
-
-	test	al, 16
-	jz	L_test_for_second_level_length ; /* if ((op & 16) == 0) 8% */
-	and	cl, 15             ; /* op &= 15 */
-	jz	L_decode_distance    ; /* if (!op) */
-
-L_add_bits_to_len:
-	sub	bl, cl
-	xor	eax, eax
-	inc	eax
-	shl	eax, cl
-	dec	eax
-	and	eax, edx          ; /* eax &= hold */
-	shr	rdx, cl
-	add	r14d, eax         ; /* len += hold & mask[op] */
-
-L_decode_distance:
-	mov	r8, r13           ; /* r8 = dmask */
-	cmp	bl, 32
-	ja	L_get_distance_code  ; /* if (32 < bits) */
-
-	lodsd                         ; /* eax = *(uint *)in++ */
-	mov	cl, bl            ; /* cl = bits, needs it for shifting */
-	add	bl, 32             ; /* bits += 32 */
-	shl	rax, cl
-	or	rdx, rax          ; /* hold |= *((uint *)in)++ << bits */
-
-L_get_distance_code:
-	and	r8, rdx           ; /* r8 &= hold */
-	mov	eax, [r11+r8*4] ; /* eax = dcode[hold & dmask] */
-
-L_dodist:
-	mov	r15d, eax         ; /* dist = this */
-	shr	r15d, 16           ; /* dist = this.val */
-	mov	cl, ah
-	sub	bl, ah            ; /* bits -= this.bits */
-	shr	rdx, cl           ; /* hold >>= this.bits */
-	mov	cl, al            ; /* cl = this.op */
-
-	test	al, 16             ; /* if ((op & 16) == 0) */
-	jz	L_test_for_second_level_dist
-	and	cl, 15             ; /* op &= 15 */
-	jz	L_check_dist_one
-
-L_add_bits_to_dist:
-	sub	bl, cl
-	xor	eax, eax
-	inc	eax
-	shl	eax, cl
-	dec	eax                 ; /* (1 << op) - 1 */
-	and	eax, edx          ; /* eax &= hold */
-	shr	rdx, cl
-	add	r15d, eax         ; /* dist += hold & ((1 << op) - 1) */
-
-L_check_window:
-	mov	r8, rsi           ; /* save in so from can use it's reg */
-	mov	rax, rdi
-	sub	rax, [rsp+40]      ; /* nbytes = out - beg */
-
-	cmp	eax, r15d
-	jb	L_clip_window        ; /* if (dist > nbytes) 4.2% */
-
-	mov	ecx, r14d         ; /* ecx = len */
-	mov	rsi, rdi
-	sub	rsi, r15          ; /* from = out - dist */
-
-	sar	ecx, 1
-	jnc	L_copy_two           ; /* if len % 2 == 0 */
-
-	rep     movsw
-	mov	al, [rsi]
-	mov	[rdi], al
-	inc	rdi
-
-	mov	rsi, r8           ; /* move in back to %rsi, toss from */
-	jmp	L_while_test
-
-L_copy_two:
-	rep     movsw
-	mov	rsi, r8           ; /* move in back to %rsi, toss from */
-	jmp	L_while_test
-
-ALIGN 4
-L_check_dist_one:
-	cmp	r15d, 1            ; /* if dist 1, is a memset */
-	jne	L_check_window
-	cmp	[rsp+40], rdi      ; /* if out == beg, outside window */
-	je	L_check_window
-
-	mov	ecx, r14d         ; /* ecx = len */
-	mov	al, [rdi-1]
-	mov	ah, al
-
-	sar	ecx, 1
-	jnc	L_set_two
-	mov	[rdi], al
-	inc	rdi
-
-L_set_two:
-	rep     stosw
-	jmp	L_while_test
-
-ALIGN 4
-L_test_for_second_level_length:
-	test	al, 64
-	jnz	L_test_for_end_of_block ; /* if ((op & 64) != 0) */
-
-	xor	eax, eax
-	inc	eax
-	shl	eax, cl
-	dec	eax
-	and	eax, edx         ; /* eax &= hold */
-	add	eax, r14d        ; /* eax += len */
-	mov	eax, [rbp+rax*4] ; /* eax = lcode[val+(hold&mask[op])]*/
-	jmp	L_dolen
-
-ALIGN 4
-L_test_for_second_level_dist:
-	test	al, 64
-	jnz	L_invalid_distance_code ; /* if ((op & 64) != 0) */
-
-	xor	eax, eax
-	inc	eax
-	shl	eax, cl
-	dec	eax
-	and	eax, edx         ; /* eax &= hold */
-	add	eax, r15d        ; /* eax += dist */
-	mov	eax, [r11+rax*4] ; /* eax = dcode[val+(hold&mask[op])]*/
-	jmp	L_dodist
-
-ALIGN 4
-L_clip_window:
-	mov	ecx, eax         ; /* ecx = nbytes */
-	mov	eax, [rsp+92]     ; /* eax = wsize, prepare for dist cmp */
-	neg	ecx                ; /* nbytes = -nbytes */
-
-	cmp	eax, r15d
-	jb	L_invalid_distance_too_far ; /* if (dist > wsize) */
-
-	add	ecx, r15d         ; /* nbytes = dist - nbytes */
-	cmp	dword ptr [rsp+96], 0
-	jne	L_wrap_around_window ; /* if (write != 0) */
-
-	mov	rsi, [rsp+56]     ; /* from  = window */
-	sub	eax, ecx         ; /* eax  -= nbytes */
-	add	rsi, rax         ; /* from += wsize - nbytes */
-
-	mov	eax, r14d        ; /* eax = len */
-	cmp	r14d, ecx
-	jbe	L_do_copy           ; /* if (nbytes >= len) */
-
-	sub	eax, ecx         ; /* eax -= nbytes */
-	rep     movsb
-	mov	rsi, rdi
-	sub	rsi, r15         ; /* from = &out[ -dist ] */
-	jmp	L_do_copy
-
-ALIGN 4
-L_wrap_around_window:
-	mov	eax, [rsp+96]     ; /* eax = write */
-	cmp	ecx, eax
-	jbe	L_contiguous_in_window ; /* if (write >= nbytes) */
-
-	mov	esi, [rsp+92]     ; /* from  = wsize */
-	add	rsi, [rsp+56]     ; /* from += window */
-	add	rsi, rax         ; /* from += write */
-	sub	rsi, rcx         ; /* from -= nbytes */
-	sub	ecx, eax         ; /* nbytes -= write */
-
-	mov	eax, r14d        ; /* eax = len */
-	cmp	eax, ecx
-	jbe	L_do_copy           ; /* if (nbytes >= len) */
-
-	sub	eax, ecx         ; /* len -= nbytes */
-	rep     movsb
-	mov	rsi, [rsp+56]     ; /* from = window */
-	mov	ecx, [rsp+96]     ; /* nbytes = write */
-	cmp	eax, ecx
-	jbe	L_do_copy           ; /* if (nbytes >= len) */
-
-	sub	eax, ecx         ; /* len -= nbytes */
-	rep     movsb
-	mov	rsi, rdi
-	sub	rsi, r15         ; /* from = out - dist */
-	jmp	L_do_copy
-
-ALIGN 4
-L_contiguous_in_window:
-	mov	rsi, [rsp+56]     ; /* rsi = window */
-	add	rsi, rax
-	sub	rsi, rcx         ; /* from += write - nbytes */
-
-	mov	eax, r14d        ; /* eax = len */
-	cmp	eax, ecx
-	jbe	L_do_copy           ; /* if (nbytes >= len) */
-
-	sub	eax, ecx         ; /* len -= nbytes */
-	rep     movsb
-	mov	rsi, rdi
-	sub	rsi, r15         ; /* from = out - dist */
-	jmp	L_do_copy           ; /* if (nbytes >= len) */
-
-ALIGN 4
-L_do_copy:
-	mov	ecx, eax         ; /* ecx = len */
-	rep     movsb
-
-	mov	rsi, r8          ; /* move in back to %esi, toss from */
-	jmp	L_while_test
-
-L_test_for_end_of_block:
-	test	al, 32
-	jz	L_invalid_literal_length_code
-	mov	dword ptr [rsp+116], 1
-	jmp	L_break_loop_with_status
-
-L_invalid_literal_length_code:
-	mov	dword ptr [rsp+116], 2
-	jmp	L_break_loop_with_status
-
-L_invalid_distance_code:
-	mov	dword ptr [rsp+116], 3
-	jmp	L_break_loop_with_status
-
-L_invalid_distance_too_far:
-	mov	dword ptr [rsp+116], 4
-	jmp	L_break_loop_with_status
-
-L_break_loop:
-	mov	dword ptr [rsp+116], 0
-
-L_break_loop_with_status:
-; /* put in, out, bits, and hold back into ar and pop esp */
-	mov	[rsp+16], rsi     ; /* in */
-	mov	[rsp+32], rdi     ; /* out */
-	mov	[rsp+88], ebx     ; /* bits */
-	mov	[rsp+80], rdx     ; /* hold */
-
-	mov	rax, [rsp]       ; /* restore rbp and rsp */
-	mov	rbp, [rsp+8]
-	mov	rsp, rax
-
-
-
-	mov rsi,[rsp-8]
-	mov rdi,[rsp-16]
-	mov r12,[rsp-24]
-	mov r13,[rsp-32]
-	mov r14,[rsp-40]
-	mov r15,[rsp-48]
-	mov rbx,[rsp-56]
-
-    ret 0
-;          :
-;          : "m" (ar)
-;          : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
-;            "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
-;    );
-
-inffas8664fnc 	ENDP
-;_TEXT	ENDS
-END
@@ -1,31 +0,0 @@
-Summary
-------
-This directory contains ASM implementations of the functions
-longest_match() and inflate_fast(), for 64 bits x86 (both AMD64 and Intel EM64t),
-for use with Microsoft Macro Assembler (x64) for AMD64 and Microsoft C++ 64 bits.
-
-gvmat64.asm is written by Gilles Vollant (2005), by using Brian Raiter 686/32 bits
-   assembly optimized version from Jean-loup Gailly original longest_match function
-
-inffasx64.asm and inffas8664.c were written by Chris Anderson, by optimizing
-   original function from Mark Adler
-
-Use instructions
----------------
-Assemble the .asm files using MASM and put the object files into the zlib source
-directory.  You can also get object files here:
-
-     http://www.winimage.com/zLibDll/zlib124_masm_obj.zip
-
-define ASMV and ASMINF in your project. Include inffas8664.c in your source tree,
-and inffasx64.obj and gvmat64.obj as object to link.
-
-
-Build instructions
------------------
-run bld_64.bat with Microsoft Macro Assembler (x64) for AMD64 (ml64.exe)
-
-ml64.exe is given with Visual Studio 2005, Windows 2003 server DDK
-
-You can get Windows 2003 server DDK with ml64 and cl for AMD64 from
-  http://www.microsoft.com/whdc/devtools/ddk/default.mspx for low price)
@@ -1,2 +0,0 @@
-ml /coff /Zi /c /Flmatch686.lst match686.asm
-ml /coff /Zi /c /Flinffas32.lst inffas32.asm
@@ -1,479 +0,0 @@
-; match686.asm -- Asm portion of the optimized longest_match for 32 bits x86
-; Copyright (C) 1995-1996 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
-; File written by Gilles Vollant, by converting match686.S from Brian Raiter
-; for MASM. This is as assembly version of longest_match
-;  from Jean-loup Gailly in deflate.c
-;
-;         http://www.zlib.net
-;         http://www.winimage.com/zLibDll
-;         http://www.muppetlabs.com/~breadbox/software/assembly.html
-;
-; For Visual C++ 4.x and higher and ML 6.x and higher
-;   ml.exe is distributed in
-;  http://www.microsoft.com/downloads/details.aspx?FamilyID=7a1c9da0-0510-44a2-b042-7ef370530c64
-;
-; this file contain two implementation of longest_match
-;
-;  this longest_match was written by Brian raiter (1998), optimized for Pentium Pro
-;   (and the faster known version of match_init on modern Core 2 Duo and AMD Phenom)
-;
-;  for using an assembly version of longest_match, you need define ASMV in project
-;
-;    compile the asm file running
-;           ml /coff /Zi /c /Flmatch686.lst match686.asm
-;    and do not include match686.obj in your project
-;
-; note: contrib of zLib 1.2.3 and earlier contained both a deprecated version for
-;  Pentium (prior Pentium Pro) and this version for Pentium Pro and modern processor
-;  with autoselect (with cpu detection code)
-;  if you want support the old pentium optimization, you can still use these version
-;
-; this file is not optimized for old pentium, but it compatible with all x86 32 bits
-; processor (starting 80386)
-;
-;
-; see below : zlib1222add must be adjuster if you use a zlib version < 1.2.2.2
-
-;uInt longest_match(s, cur_match)
-;    deflate_state *s;
-;    IPos cur_match;                             /* current match */
-
-    NbStack         equ     76
-    cur_match       equ     dword ptr[esp+NbStack-0]
-    str_s           equ     dword ptr[esp+NbStack-4]
-; 5 dword on top (ret,ebp,esi,edi,ebx)
-    adrret          equ     dword ptr[esp+NbStack-8]
-    pushebp         equ     dword ptr[esp+NbStack-12]
-    pushedi         equ     dword ptr[esp+NbStack-16]
-    pushesi         equ     dword ptr[esp+NbStack-20]
-    pushebx         equ     dword ptr[esp+NbStack-24]
-
-    chain_length    equ     dword ptr [esp+NbStack-28]
-    limit           equ     dword ptr [esp+NbStack-32]
-    best_len        equ     dword ptr [esp+NbStack-36]
-    window          equ     dword ptr [esp+NbStack-40]
-    prev            equ     dword ptr [esp+NbStack-44]
-    scan_start      equ      word ptr [esp+NbStack-48]
-    wmask           equ     dword ptr [esp+NbStack-52]
-    match_start_ptr equ     dword ptr [esp+NbStack-56]
-    nice_match      equ     dword ptr [esp+NbStack-60]
-    scan            equ     dword ptr [esp+NbStack-64]
-
-    windowlen       equ     dword ptr [esp+NbStack-68]
-    match_start     equ     dword ptr [esp+NbStack-72]
-    strend          equ     dword ptr [esp+NbStack-76]
-    NbStackAdd      equ     (NbStack-24)
-
-    .386p
-
-    name    gvmatch
-    .MODEL  FLAT
-
-
-
-;  all the +zlib1222add offsets are due to the addition of fields
-;  in zlib in the deflate_state structure since the asm code was first written
-;  (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
-;  (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
-;  if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
-
-    zlib1222add         equ     8
-
-;  Note : these value are good with a 8 bytes boundary pack structure
-    dep_chain_length    equ     74h+zlib1222add
-    dep_window          equ     30h+zlib1222add
-    dep_strstart        equ     64h+zlib1222add
-    dep_prev_length     equ     70h+zlib1222add
-    dep_nice_match      equ     88h+zlib1222add
-    dep_w_size          equ     24h+zlib1222add
-    dep_prev            equ     38h+zlib1222add
-    dep_w_mask          equ     2ch+zlib1222add
-    dep_good_match      equ     84h+zlib1222add
-    dep_match_start     equ     68h+zlib1222add
-    dep_lookahead       equ     6ch+zlib1222add
-
-
-_TEXT                   segment
-
-IFDEF NOUNDERLINE
-            public  longest_match
-            public  match_init
-ELSE
-            public  _longest_match
-            public  _match_init
-ENDIF
-
-    MAX_MATCH           equ     258
-    MIN_MATCH           equ     3
-    MIN_LOOKAHEAD       equ     (MAX_MATCH+MIN_MATCH+1)
-
-
-
-MAX_MATCH       equ     258
-MIN_MATCH       equ     3
-MIN_LOOKAHEAD   equ     (MAX_MATCH + MIN_MATCH + 1)
-MAX_MATCH_8_     equ     ((MAX_MATCH + 7) AND 0FFF0h)
-
-
-;;; stack frame offsets
-
-chainlenwmask   equ  esp + 0    ; high word: current chain len
-                    ; low word: s->wmask
-window      equ  esp + 4    ; local copy of s->window
-windowbestlen   equ  esp + 8    ; s->window + bestlen
-scanstart   equ  esp + 16   ; first two bytes of string
-scanend     equ  esp + 12   ; last two bytes of string
-scanalign   equ  esp + 20   ; dword-misalignment of string
-nicematch   equ  esp + 24   ; a good enough match size
-bestlen     equ  esp + 28   ; size of best match so far
-scan        equ  esp + 32   ; ptr to string wanting match
-
-LocalVarsSize   equ 36
-;   saved ebx   byte esp + 36
-;   saved edi   byte esp + 40
-;   saved esi   byte esp + 44
-;   saved ebp   byte esp + 48
-;   return address  byte esp + 52
-deflatestate    equ  esp + 56   ; the function arguments
-curmatch    equ  esp + 60
-
-;;; Offsets for fields in the deflate_state structure. These numbers
-;;; are calculated from the definition of deflate_state, with the
-;;; assumption that the compiler will dword-align the fields. (Thus,
-;;; changing the definition of deflate_state could easily cause this
-;;; program to crash horribly, without so much as a warning at
-;;; compile time. Sigh.)
-
-dsWSize     equ 36+zlib1222add
-dsWMask     equ 44+zlib1222add
-dsWindow    equ 48+zlib1222add
-dsPrev      equ 56+zlib1222add
-dsMatchLen  equ 88+zlib1222add
-dsPrevMatch equ 92+zlib1222add
-dsStrStart  equ 100+zlib1222add
-dsMatchStart    equ 104+zlib1222add
-dsLookahead equ 108+zlib1222add
-dsPrevLen   equ 112+zlib1222add
-dsMaxChainLen   equ 116+zlib1222add
-dsGoodMatch equ 132+zlib1222add
-dsNiceMatch equ 136+zlib1222add
-
-
-;;; match686.asm -- Pentium-Pro-optimized version of longest_match()
-;;; Written for zlib 1.1.2
-;;; Copyright (C) 1998 Brian Raiter <breadbox@muppetlabs.com>
-;;; You can look at http://www.muppetlabs.com/~breadbox/software/assembly.html
-;;;
-;;
-;;  This software is provided 'as-is', without any express or implied
-;;  warranty.  In no event will the authors be held liable for any damages
-;;  arising from the use of this software.
-;;
-;;  Permission is granted to anyone to use this software for any purpose,
-;;  including commercial applications, and to alter it and redistribute it
-;;  freely, subject to the following restrictions:
-;;
-;;  1. The origin of this software must not be misrepresented; you must not
-;;     claim that you wrote the original software. If you use this software
-;;     in a product, an acknowledgment in the product documentation would be
-;;     appreciated but is not required.
-;;  2. Altered source versions must be plainly marked as such, and must not be
-;;     misrepresented as being the original software
-;;  3. This notice may not be removed or altered from any source distribution.
-;;
-
-;GLOBAL _longest_match, _match_init
-
-
-;SECTION    .text
-
-;;; uInt longest_match(deflate_state *deflatestate, IPos curmatch)
-
-;_longest_match:
-    IFDEF NOUNDERLINE
-    longest_match       proc near
-    ELSE
-    _longest_match      proc near
-    ENDIF
-.FPO (9, 4, 0, 0, 1, 0)
-
-;;; Save registers that the compiler may be using, and adjust esp to
-;;; make room for our stack frame.
-
-        push    ebp
-        push    edi
-        push    esi
-        push    ebx
-        sub esp, LocalVarsSize
-
-;;; Retrieve the function arguments. ecx will hold cur_match
-;;; throughout the entire function. edx will hold the pointer to the
-;;; deflate_state structure during the function's setup (before
-;;; entering the main loop.
-
-        mov edx, [deflatestate]
-        mov ecx, [curmatch]
-
-;;; uInt wmask = s->w_mask;
-;;; unsigned chain_length = s->max_chain_length;
-;;; if (s->prev_length >= s->good_match) {
-;;;     chain_length >>= 2;
-;;; }
-
-        mov eax, [edx + dsPrevLen]
-        mov ebx, [edx + dsGoodMatch]
-        cmp eax, ebx
-        mov eax, [edx + dsWMask]
-        mov ebx, [edx + dsMaxChainLen]
-        jl  LastMatchGood
-        shr ebx, 2
-LastMatchGood:
-
-;;; chainlen is decremented once beforehand so that the function can
-;;; use the sign flag instead of the zero flag for the exit test.
-;;; It is then shifted into the high word, to make room for the wmask
-;;; value, which it will always accompany.
-
-        dec ebx
-        shl ebx, 16
-        or  ebx, eax
-        mov [chainlenwmask], ebx
-
-;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-
-        mov eax, [edx + dsNiceMatch]
-        mov ebx, [edx + dsLookahead]
-        cmp ebx, eax
-        jl  LookaheadLess
-        mov ebx, eax
-LookaheadLess:  mov [nicematch], ebx
-
-;;; register Bytef *scan = s->window + s->strstart;
-
-        mov esi, [edx + dsWindow]
-        mov [window], esi
-        mov ebp, [edx + dsStrStart]
-        lea edi, [esi + ebp]
-        mov [scan], edi
-
-;;; Determine how many bytes the scan ptr is off from being
-;;; dword-aligned.
-
-        mov eax, edi
-        neg eax
-        and eax, 3
-        mov [scanalign], eax
-
-;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
-;;;     s->strstart - (IPos)MAX_DIST(s) : NIL;
-
-        mov eax, [edx + dsWSize]
-        sub eax, MIN_LOOKAHEAD
-        sub ebp, eax
-        jg  LimitPositive
-        xor ebp, ebp
-LimitPositive:
-
-;;; int best_len = s->prev_length;
-
-        mov eax, [edx + dsPrevLen]
-        mov [bestlen], eax
-
-;;; Store the sum of s->window + best_len in esi locally, and in esi.
-
-        add esi, eax
-        mov [windowbestlen], esi
-
-;;; register ush scan_start = *(ushf*)scan;
-;;; register ush scan_end   = *(ushf*)(scan+best_len-1);
-;;; Posf *prev = s->prev;
-
-        movzx   ebx, word ptr [edi]
-        mov [scanstart], ebx
-        movzx   ebx, word ptr [edi + eax - 1]
-        mov [scanend], ebx
-        mov edi, [edx + dsPrev]
-
-;;; Jump into the main loop.
-
-        mov edx, [chainlenwmask]
-        jmp short LoopEntry
-
-align 4
-
-;;; do {
-;;;     match = s->window + cur_match;
-;;;     if (*(ushf*)(match+best_len-1) != scan_end ||
-;;;         *(ushf*)match != scan_start) continue;
-;;;     [...]
-;;; } while ((cur_match = prev[cur_match & wmask]) > limit
-;;;          && --chain_length != 0);
-;;;
-;;; Here is the inner loop of the function. The function will spend the
-;;; majority of its time in this loop, and majority of that time will
-;;; be spent in the first ten instructions.
-;;;
-;;; Within this loop:
-;;; ebx = scanend
-;;; ecx = curmatch
-;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
-;;; esi = windowbestlen - i.e., (window + bestlen)
-;;; edi = prev
-;;; ebp = limit
-
-LookupLoop:
-        and ecx, edx
-        movzx   ecx, word ptr [edi + ecx*2]
-        cmp ecx, ebp
-        jbe LeaveNow
-        sub edx, 00010000h
-        js  LeaveNow
-LoopEntry:  movzx   eax, word ptr [esi + ecx - 1]
-        cmp eax, ebx
-        jnz LookupLoop
-        mov eax, [window]
-        movzx   eax, word ptr [eax + ecx]
-        cmp eax, [scanstart]
-        jnz LookupLoop
-
-;;; Store the current value of chainlen.
-
-        mov [chainlenwmask], edx
-
-;;; Point edi to the string under scrutiny, and esi to the string we
-;;; are hoping to match it up with. In actuality, esi and edi are
-;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
-;;; initialized to -(MAX_MATCH_8 - scanalign).
-
-        mov esi, [window]
-        mov edi, [scan]
-        add esi, ecx
-        mov eax, [scanalign]
-        mov edx, 0fffffef8h; -(MAX_MATCH_8)
-        lea edi, [edi + eax + 0108h] ;MAX_MATCH_8]
-        lea esi, [esi + eax + 0108h] ;MAX_MATCH_8]
-
-;;; Test the strings for equality, 8 bytes at a time. At the end,
-;;; adjust edx so that it is offset to the exact byte that mismatched.
-;;;
-;;; We already know at this point that the first three bytes of the
-;;; strings match each other, and they can be safely passed over before
-;;; starting the compare loop. So what this code does is skip over 0-3
-;;; bytes, as much as necessary in order to dword-align the edi
-;;; pointer. (esi will still be misaligned three times out of four.)
-;;;
-;;; It should be confessed that this loop usually does not represent
-;;; much of the total running time. Replacing it with a more
-;;; straightforward "rep cmpsb" would not drastically degrade
-;;; performance.
-
-LoopCmps:
-        mov eax, [esi + edx]
-        xor eax, [edi + edx]
-        jnz LeaveLoopCmps
-        mov eax, [esi + edx + 4]
-        xor eax, [edi + edx + 4]
-        jnz LeaveLoopCmps4
-        add edx, 8
-        jnz LoopCmps
-        jmp short LenMaximum
-LeaveLoopCmps4: add edx, 4
-LeaveLoopCmps:  test    eax, 0000FFFFh
-        jnz LenLower
-        add edx,  2
-        shr eax, 16
-LenLower:   sub al, 1
-        adc edx, 0
-
-;;; Calculate the length of the match. If it is longer than MAX_MATCH,
-;;; then automatically accept it as the best possible match and leave.
-
-        lea eax, [edi + edx]
-        mov edi, [scan]
-        sub eax, edi
-        cmp eax, MAX_MATCH
-        jge LenMaximum
-
-;;; If the length of the match is not longer than the best match we
-;;; have so far, then forget it and return to the lookup loop.
-
-        mov edx, [deflatestate]
-        mov ebx, [bestlen]
-        cmp eax, ebx
-        jg  LongerMatch
-        mov esi, [windowbestlen]
-        mov edi, [edx + dsPrev]
-        mov ebx, [scanend]
-        mov edx, [chainlenwmask]
-        jmp LookupLoop
-
-;;;         s->match_start = cur_match;
-;;;         best_len = len;
-;;;         if (len >= nice_match) break;
-;;;         scan_end = *(ushf*)(scan+best_len-1);
-
-LongerMatch:    mov ebx, [nicematch]
-        mov [bestlen], eax
-        mov [edx + dsMatchStart], ecx
-        cmp eax, ebx
-        jge LeaveNow
-        mov esi, [window]
-        add esi, eax
-        mov [windowbestlen], esi
-        movzx   ebx, word ptr [edi + eax - 1]
-        mov edi, [edx + dsPrev]
-        mov [scanend], ebx
-        mov edx, [chainlenwmask]
-        jmp LookupLoop
-
-;;; Accept the current string, with the maximum possible length.
-
-LenMaximum: mov edx, [deflatestate]
-        mov dword ptr [bestlen], MAX_MATCH
-        mov [edx + dsMatchStart], ecx
-
-;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
-;;; return s->lookahead;
-
-LeaveNow:
-        mov edx, [deflatestate]
-        mov ebx, [bestlen]
-        mov eax, [edx + dsLookahead]
-        cmp ebx, eax
-        jg  LookaheadRet
-        mov eax, ebx
-LookaheadRet:
-
-;;; Restore the stack and return from whence we came.
-
-        add esp, LocalVarsSize
-        pop ebx
-        pop esi
-        pop edi
-        pop ebp
-
-        ret
-; please don't remove this string !
-; Your can freely use match686 in any free or commercial app if you don't remove the string in the binary!
-    db     0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998",0dh,0ah
-
-
-    IFDEF NOUNDERLINE
-    longest_match       endp
-    ELSE
-    _longest_match      endp
-    ENDIF
-
-    IFDEF NOUNDERLINE
-    match_init      proc near
-                    ret
-    match_init      endp
-    ELSE
-    _match_init     proc near
-                    ret
-    _match_init     endp
-    ENDIF
-
-
-_TEXT   ends
-end
@@ -1,27 +0,0 @@
-
-Summary
-------
-This directory contains ASM implementations of the functions
-longest_match() and inflate_fast().
-
-
-Use instructions
----------------
-Assemble using MASM, and copy the object files into the zlib source
-directory, then run the appropriate makefile, as suggested below.  You can
-donwload MASM from here:
-
-    http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=7a1c9da0-0510-44a2-b042-7ef370530c64
-
-You can also get objects files here:
-
-    http://www.winimage.com/zLibDll/zlib124_masm_obj.zip
-
-Build instructions
------------------
-* With Microsoft C and MASM:
-nmake -f win32/Makefile.msc LOC="-DASMV -DASMINF" OBJA="match686.obj inffas32.obj"
-
-* With Borland C and TASM:
-make -f win32/Makefile.bor LOCAL_ZLIB="-DASMV -DASMINF" OBJA="match686.obj inffas32.obj" OBJPA="+match686c.obj+match686.obj+inffas32.obj"
-
@@ -1,5 +1,5 @@
 CC=cc
-CFLAGS=-O -I../..
+CFLAGS := $(CFLAGS) -O -I../..

 UNZ_OBJS = miniunz.o unzip.o ioapi.o ../../libz.a
 ZIP_OBJS = minizip.o zip.o   ioapi.o ../../libz.a
@@ -16,10 +16,14 @@ minizip:  $(ZIP_OBJS)
 	$(CC) $(CFLAGS) -o $@ $(ZIP_OBJS)

 test:	miniunz minizip
-	./minizip test readme.txt
+	@rm -f test.*
+	@echo hello hello hello > test.txt
+	./minizip test test.txt
 	./miniunz -l test.zip
-	mv readme.txt readme.old
+	@mv test.txt test.old
 	./miniunz test.zip
+	@cmp test.txt test.old
+	@rm -f test.*

 clean:
-	/bin/rm -f *.o *~ minizip miniunz
+	/bin/rm -f *.o *~ minizip miniunz test.*
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

-AC_INIT([minizip], [1.2.11], [bugzilla.redhat.com])
+AC_INIT([minizip], [1.2.12], [bugzilla.redhat.com])
 AC_CONFIG_SRCDIR([minizip.c])
 AM_INIT_AUTOMAKE([foreign])
 LT_INIT
@@ -37,8 +37,8 @@ static int decrypt_byte(unsigned long* pkeys, const z_crc_t* pcrc_32_tab)
    unsigned temp;  /* POTENTIAL BUG:  temp*(temp^1) may overflow in an
                     * unpredictable manner on 16-bit systems; not a problem
                     * with any known compiler so far, though */
-    (void)pcrc_32_tab;

+    (void)pcrc_32_tab;
    temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2;
    return (int)(((temp * (temp ^ 1)) >> 8) & 0xff);
 }
@@ -52,7 +52,7 @@ static int update_keys(unsigned long* pkeys,const z_crc_t* pcrc_32_tab,int c)
    (*(pkeys+1)) += (*(pkeys+0)) & 0xff;
    (*(pkeys+1)) = (*(pkeys+1)) * 134775813L + 1;
    {
-      int keyshift = (int)((*(pkeys+1)) >> 24);
+      register int keyshift = (int)((*(pkeys+1)) >> 24);
      (*(pkeys+2)) = CRC32((*(pkeys+2)), keyshift);
    }
    return c;
@@ -78,24 +78,24 @@ static void init_keys(const char* passwd,unsigned long* pkeys,const z_crc_t* pcr
    (update_keys(pkeys,pcrc_32_tab,c ^= decrypt_byte(pkeys,pcrc_32_tab)))

 #define zencode(pkeys,pcrc_32_tab,c,t) \
-    (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), t^(c))
+    (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), (Byte)t^(c))

 #ifdef INCLUDECRYPTINGCODE_IFCRYPTALLOWED

 #define RAND_HEAD_LEN  12
   /* "last resort" source for second part of crypt seed pattern */
 #  ifndef ZCR_SEED2
-#    define ZCR_SEED2 3141592654UL     /* use PI as default pattern */
+#    define ZCR_SEED2 3141592654L       /* use PI as default pattern */
 #  endif

-static int crypthead(const char* passwd,      /* password string */
-                     unsigned char* buf,      /* where to write header */
-                     int bufSize,
-                     unsigned long* pkeys,
-                     const z_crc_t* pcrc_32_tab,
-                     unsigned long crcForCrypting)
+static unsigned crypthead(const char* passwd,       /* password string */
+                          unsigned char* buf,       /* where to write header */
+                          int bufSize,
+                          unsigned long* pkeys,
+                          const z_crc_t* pcrc_32_tab,
+                          unsigned long crcForCrypting)
 {
-    int n;                       /* index in random header */
+    unsigned n;                  /* index in random header */
    int t;                       /* temporary */
    int c;                       /* random byte */
    unsigned char header[RAND_HEAD_LEN-2]; /* random header */
@@ -14,11 +14,7 @@
        #define _CRT_SECURE_NO_WARNINGS
 #endif

-#if defined(_WIN32)
-#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
-#define FTELLO_FUNC(stream) _ftelli64(stream)
-#define FSEEKO_FUNC(stream, offset, origin) _fseeki64(stream, offset, origin)
-#elif defined(__APPLE__) || defined(IOAPI_NO_64)
+#if defined(__APPLE__) || defined(IOAPI_NO_64)
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
@@ -62,7 +58,7 @@ ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream
        return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
    else
    {
-        uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
+        uLong tell_uLong = (uLong)(*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
        if ((tell_uLong) == MAXU32)
            return (ZPOS64_T)-1;
        else
@@ -98,6 +94,7 @@ static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));

 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
 {
+    (void)opaque;
    FILE* file = NULL;
    const char* mode_fopen = NULL;
    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
@@ -116,6 +113,7 @@ static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, in

 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
 {
+    (void)opaque;
    FILE* file = NULL;
    const char* mode_fopen = NULL;
    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
@@ -135,6 +133,7 @@ static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename,

 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
 {
+    (void)opaque;
    uLong ret;
    ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
    return ret;
@@ -142,6 +141,7 @@ static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf,

 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
 {
+    (void)opaque;
    uLong ret;
    ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
    return ret;
@@ -149,6 +149,7 @@ static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const voi

 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
    long ret;
    ret = ftell((FILE *)stream);
    return ret;
@@ -157,13 +158,15 @@ static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)

 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
    ZPOS64_T ret;
-    ret = FTELLO_FUNC((FILE *)stream);
+    ret = (ZPOS64_T)FTELLO_FUNC((FILE *)stream);
    return ret;
 }

 static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
 {
+    (void)opaque;
    int fseek_origin=0;
    long ret;
    switch (origin)
@@ -180,13 +183,14 @@ static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offs
    default: return -1;
    }
    ret = 0;
-    if (fseek((FILE *)stream, offset, fseek_origin) != 0)
+    if (fseek((FILE *)stream, (long)offset, fseek_origin) != 0)
        ret = -1;
    return ret;
 }

 static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
 {
+    (void)opaque;
    int fseek_origin=0;
    long ret;
    switch (origin)
@@ -204,7 +208,7 @@ static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T
    }
    ret = 0;

-    if(FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
+    if(FSEEKO_FUNC((FILE *)stream, (long)offset, fseek_origin) != 0)
                        ret = -1;

    return ret;
@@ -213,6 +217,7 @@ static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T

 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
    int ret;
    ret = fclose((FILE *)stream);
    return ret;
@@ -220,6 +225,7 @@ static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)

 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
 {
+    (void)opaque;
    int ret;
    ret = ferror((FILE *)stream);
    return ret;
@@ -91,8 +91,7 @@ typedef  64BIT_INT_CUSTOM_TYPE ZPOS64_T;
 typedef uint64_t ZPOS64_T;
 #else

-/* Maximum unsigned 32-bit value used as placeholder for zip64 */
-#define MAXU32 0xffffffff
+

 #if defined(_MSC_VER) || defined(__BORLANDC__)
 typedef unsigned __int64 ZPOS64_T;
@@ -102,7 +101,10 @@ typedef unsigned long long int ZPOS64_T;
 #endif
 #endif

-
+/* Maximum unsigned 32-bit value used as placeholder for zip64 */
+#ifndef MAXU32
+#define MAXU32 (0xffffffff)
+#endif

 #ifdef __cplusplus
 extern "C" {
@@ -45,6 +45,7 @@
 #include <time.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <sys/stat.h>

 #ifdef _WIN32
 # include <direct.h>
@@ -80,7 +81,7 @@
    filename : the filename of the file where date/time must be modified
    dosdate : the new date at the MSDos format (4 bytes)
    tmu_date : the SAME new date at the tm_unz format */
-void change_file_date(filename,dosdate,tmu_date)
+static void change_file_date(filename,dosdate,tmu_date)
    const char *filename;
    uLong dosdate;
    tm_unz tmu_date;
@@ -98,6 +99,7 @@ void change_file_date(filename,dosdate,tmu_date)
  CloseHandle(hFile);
 #else
 #if defined(unix) || defined(__APPLE__)
+  (void)dosdate;
  struct utimbuf ut;
  struct tm newdate;
  newdate.tm_sec = tmu_date.tm_sec;
@@ -121,7 +123,7 @@ void change_file_date(filename,dosdate,tmu_date)
 /* mymkdir and change_file_date are not 100 % portable
   As I don't know well Unix, I wait feedback for the unix portion */

-int mymkdir(dirname)
+static int mymkdir(dirname)
    const char* dirname;
 {
    int ret=0;
@@ -135,14 +137,14 @@ int mymkdir(dirname)
    return ret;
 }

-int makedir (newdir)
-    char *newdir;
+static int makedir (newdir)
+    const char *newdir;
 {
  char *buffer ;
  char *p;
-  int  len = (int)strlen(newdir);
+  size_t len = strlen(newdir);

-  if (len <= 0)
+  if (len == 0)
    return 0;

  buffer = (char*)malloc(len+1);
@@ -185,13 +187,13 @@ int makedir (newdir)
  return 1;
 }

-void do_banner()
+static void do_banner()
 {
    printf("MiniUnz 1.01b, demo of zLib + Unz package written by Gilles Vollant\n");
    printf("more info at http://www.winimage.com/zLibDll/unzip.html\n\n");
 }

-void do_help()
+static void do_help()
 {
    printf("Usage : miniunz [-e] [-x] [-v] [-l] [-o] [-p password] file.zip [file_to_extr.] [-d extractdir]\n\n" \
           "  -e  Extract without pathname (junk paths)\n" \
@@ -203,7 +205,7 @@ void do_help()
           "  -p  extract crypted file using password\n\n");
 }

-void Display64BitsSize(ZPOS64_T n, int size_char)
+static void Display64BitsSize(ZPOS64_T n, int size_char)
 {
  /* to avoid compatibility problem , we do here the conversion */
  char number[21];
@@ -231,7 +233,7 @@ void Display64BitsSize(ZPOS64_T n, int size_char)
  printf("%s",&number[pos_string]);
 }

-int do_list(uf)
+static int do_list(uf)
    unzFile uf;
 {
    uLong i;
@@ -309,7 +311,7 @@ int do_list(uf)
 }


-int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
+static int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
    unzFile uf;
    const int* popt_extract_without_path;
    int* popt_overwrite;
@@ -324,7 +326,6 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
    uInt size_buf;

    unz_file_info64 file_info;
-    uLong ratio=0;
    err = unzGetCurrentFileInfo64(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);

    if (err!=UNZ_OK)
@@ -439,7 +440,7 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
                    break;
                }
                if (err>0)
-                    if (fwrite(buf,err,1,fout)!=1)
+                    if (fwrite(buf,(unsigned)err,1,fout)!=1)
                    {
                        printf("error in writing extracted file\n");
                        err=UNZ_ERRNO;
@@ -472,7 +473,7 @@ int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
 }


-int do_extract(uf,opt_extract_without_path,opt_overwrite,password)
+static int do_extract(uf,opt_extract_without_path,opt_overwrite,password)
    unzFile uf;
    int opt_extract_without_path;
    int opt_overwrite;
@@ -481,7 +482,6 @@ int do_extract(uf,opt_extract_without_path,opt_overwrite,password)
    uLong i;
    unz_global_info64 gi;
    int err;
-    FILE* fout=NULL;

    err = unzGetGlobalInfo64(uf,&gi);
    if (err!=UNZ_OK)
@@ -508,14 +508,13 @@ int do_extract(uf,opt_extract_without_path,opt_overwrite,password)
    return 0;
 }

-int do_extract_onefile(uf,filename,opt_extract_without_path,opt_overwrite,password)
+static int do_extract_onefile(uf,filename,opt_extract_without_path,opt_overwrite,password)
    unzFile uf;
    const char* filename;
    int opt_extract_without_path;
    int opt_overwrite;
    const char* password;
 {
-    int err = UNZ_OK;
    if (unzLocateFile(uf,filename,CASESENSITIVITY)!=UNZ_OK)
    {
        printf("file %s not found in the zipfile\n",filename);
@@ -12,6 +12,7 @@
         Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
 */

+
 #if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
        #ifndef __USE_FILE_OFFSET64
                #define __USE_FILE_OFFSET64
@@ -27,11 +28,7 @@
        #endif
 #endif

-#if defined(_WIN32)
-#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
-#define FTELLO_FUNC(stream) _ftelli64(stream)
-#define FSEEKO_FUNC(stream, offset, origin) _fseeki64(stream, offset, origin)
-#elif defined(__APPLE__) || defined(IOAPI_NO_64)
+#ifdef __APPLE__
 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 #define FTELLO_FUNC(stream) ftello(stream)
@@ -42,7 +39,8 @@
 #define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
 #endif

-#include "tinydir.h"
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -73,9 +71,9 @@
 #define MAXFILENAME (256)

 #ifdef _WIN32
-uLong filetime(f, tmzip, dt)
-    const char *f;         /* name of file to get info on */
-    tm_zip *tmzip;         /* return value: access, modific. and creation times */
+static int filetime(f, tmzip, dt)
+    const char *f;          /* name of file to get info on */
+    tm_zip *tmzip;             /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
  int ret = 0;
@@ -97,11 +95,12 @@ uLong filetime(f, tmzip, dt)
 }
 #else
 #if defined(unix) || defined(__APPLE__)
-uLong filetime(f, tmzip, dt)
+static int filetime(f, tmzip, dt)
    const char *f;         /* name of file to get info on */
    tm_zip *tmzip;         /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
+  (void)dt;
  int ret=0;
  struct stat s;        /* results of stat() */
  struct tm* filedate;
@@ -110,7 +109,7 @@ uLong filetime(f, tmzip, dt)
  if (strcmp(f,"-")!=0)
  {
    char name[MAXFILENAME+1];
-    int len = strlen(f);
+    size_t len = strlen(f);
    if (len > MAXFILENAME)
      len = MAXFILENAME;

@@ -140,8 +139,8 @@ uLong filetime(f, tmzip, dt)
 }
 #else
 uLong filetime(f, tmzip, dt)
-    const char *f;         /* name of file to get info on */
-    tm_zip *tmzip;         /* return value: access, modific. and creation times */
+    const char *f;          /* name of file to get info on */
+    tm_zip *tmzip;             /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
 {
    return 0;
@@ -152,7 +151,7 @@ uLong filetime(f, tmzip, dt)



-int check_exist_file(filename)
+static int check_exist_file(filename)
    const char* filename;
 {
    FILE* ftestexist;
@@ -165,16 +164,15 @@ int check_exist_file(filename)
    return ret;
 }

-void do_banner()
+static void do_banner()
 {
    printf("MiniZip 1.1, demo of zLib + MiniZip64 package, written by Gilles Vollant\n");
    printf("more info on MiniZip at http://www.winimage.com/zLibDll/minizip.html\n\n");
 }

-void do_help()
+static void do_help()
 {
    printf("Usage : minizip [-o] [-a] [-0 to -9] [-p password] [-j] file.zip [files_to_add]\n\n" \
-           "  -r  Scan directories recursively\n" \
           "  -o  Overwrite existing file.zip\n" \
           "  -a  Append to existing file.zip\n" \
           "  -0  Store only\n" \
@@ -185,7 +183,7 @@ void do_help()

 /* calculate the CRC32 of a file,
   because to encrypt a file, we need known the CRC32 of the file before */
-int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigned long* result_crc)
+static int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigned long* result_crc)
 {
   unsigned long calculate_crc=0;
   int err=ZIP_OK;
@@ -202,7 +200,7 @@ int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigne
        do
        {
            err = ZIP_OK;
-            size_read = (int)fread(buf,1,size_buf,fin);
+            size_read = fread(buf,1,size_buf,fin);
            if (size_read < size_buf)
                if (feof(fin)==0)
            {
@@ -211,7 +209,7 @@ int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigne
            }

            if (size_read>0)
-                calculate_crc = crc32(calculate_crc,buf,size_read);
+                calculate_crc = crc32_z(calculate_crc,buf,size_read);
            total_read += size_read;

        } while ((err == ZIP_OK) && (size_read>0));
@@ -224,7 +222,7 @@ int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigne
    return err;
 }

-int isLargeFile(const char* filename)
+static int isLargeFile(const char* filename)
 {
  int largeFile = 0;
  ZPOS64_T pos = 0;
@@ -232,8 +230,8 @@ int isLargeFile(const char* filename)

  if(pFile != NULL)
  {
-    int n = FSEEKO_FUNC(pFile, 0, SEEK_END);
-    pos = FTELLO_FUNC(pFile);
+    FSEEKO_FUNC(pFile, 0, SEEK_END);
+    pos = (ZPOS64_T)FTELLO_FUNC(pFile);

                printf("File : %s is %lld bytes\n", filename, pos);

@@ -246,160 +244,19 @@ int isLargeFile(const char* filename)
 return largeFile;
 }

-void addFileToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
-    FILE * fin;
-    int size_read;
-    const char *savefilenameinzip;
-    zip_fileinfo zi;
-    unsigned long crcFile=0;
-    int zip64 = 0;
-    int err=0;
-    int size_buf=WRITEBUFFERSIZE;
-    unsigned char buf[WRITEBUFFERSIZE];
-    zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
-    zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
-    zi.dosDate = 0;
-    zi.internal_fa = 0;
-    zi.external_fa = 0;
-    filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
-
-/*
-    err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
-                     NULL,0,NULL,0,NULL / * comment * /,
-                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                     opt_compress_level);
-*/
-    if ((password != NULL) && (err==ZIP_OK))
-        err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
-
-    zip64 = isLargeFile(filenameinzip);
-
-   /* The path name saved, should not include a leading slash. */
-   /*if it did, windows/xp and dynazip couldn't read the zip file. */
-     savefilenameinzip = filenameinzip;
-     while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
-     {
-         savefilenameinzip++;
-     }
-
-     /*should the zip file contain any path at all?*/
-     if( opt_exclude_path )
-     {
-         const char *tmpptr;
-         const char *lastslash = 0;
-         for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
-         {
-             if( *tmpptr == '\\' || *tmpptr == '/')
-             {
-                 lastslash = tmpptr;
-             }
-         }
-         if( lastslash != NULL )
-         {
-             savefilenameinzip = lastslash+1; // base filename follows last slash.
-         }
-     }
-
-     /**/
-    err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
-                     NULL,0,NULL,0,NULL /* comment*/,
-                     (opt_compress_level != 0) ? Z_DEFLATED : 0,
-                     opt_compress_level,0,
-                     /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
-                     -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
-                     password,crcFile, zip64);
-
-    if (err != ZIP_OK)
-        printf("error in opening %s in zipfile\n",filenameinzip);
-    else
-    {
-        fin = FOPEN_FUNC(filenameinzip,"rb");
-        if (fin==NULL)
-        {
-            err=ZIP_ERRNO;
-            printf("error in opening %s for reading\n",filenameinzip);
-        }
-    }
-
-    if (err == ZIP_OK)
-        do
-        {
-            err = ZIP_OK;
-            size_read = (int)fread(buf,1,size_buf,fin);
-            if (size_read < size_buf)
-                if (feof(fin)==0)
-            {
-                printf("error in reading %s\n",filenameinzip);
-                err = ZIP_ERRNO;
-            }
-
-            if (size_read>0)
-            {
-                err = zipWriteInFileInZip (zf,buf,size_read);
-                if (err<0)
-                {
-                    printf("error in writing %s in the zipfile\n",
-                                     filenameinzip);
-                }
-
-            }
-        } while ((err == ZIP_OK) && (size_read>0));
-
-    if (fin)
-        fclose(fin);
-
-    if (err<0)
-        err=ZIP_ERRNO;
-    else
-    {
-        err = zipCloseFileInZip(zf);
-        if (err!=ZIP_OK)
-            printf("error in closing %s in the zipfile\n",
-                        filenameinzip);
-    }
-}
-
-
-void addPathToZip(zipFile zf, const char *filenameinzip, const char *password, int opt_exclude_path,int opt_compress_level) {
-    tinydir_dir dir;
-    int i;
-    char newname[512];
-
-    tinydir_open_sorted(&dir, filenameinzip);
-
-    for (i = 0; i < dir.n_files; i++)
-    {
-        tinydir_file file;
-        tinydir_readfile_n(&dir, &file, i);
-        if(strcmp(file.name,".")==0) continue;
-        if(strcmp(file.name,"..")==0) continue;
-        sprintf(newname,"%s/%s",dir.path,file.name);
-        if (file.is_dir)
-        {
-            addPathToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
-        } else {
-            addFileToZip(zf,newname,password,opt_exclude_path,opt_compress_level);
-        }
-    }
-
-    tinydir_close(&dir);
-}
-
-
 int main(argc,argv)
    int argc;
    char *argv[];
 {
    int i;
-    int opt_recursive=0;
-    int opt_overwrite=1;
+    int opt_overwrite=0;
    int opt_compress_level=Z_DEFAULT_COMPRESSION;
    int opt_exclude_path=0;
    int zipfilenamearg = 0;
    char filename_try[MAXFILENAME+16];
    int zipok;
    int err=0;
-    int size_buf=0;
+    size_t size_buf=0;
    void* buf=NULL;
    const char* password=NULL;

@@ -429,8 +286,7 @@ int main(argc,argv)
                        opt_compress_level = c-'0';
                    if ((c=='j') || (c=='J'))
                        opt_exclude_path = 1;
-                    if ((c=='r') || (c=='R'))
-                        opt_recursive = 1;
+
                    if (((c=='p') || (c=='P')) && (i+1<argc))
                    {
                        password=argv[i+1];
@@ -537,14 +393,117 @@ int main(argc,argv)
                  ((argv[i][1]=='o') || (argv[i][1]=='O') ||
                   (argv[i][1]=='a') || (argv[i][1]=='A') ||
                   (argv[i][1]=='p') || (argv[i][1]=='P') ||
-                   (argv[i][1]=='r') || (argv[i][1]=='R') ||
                   ((argv[i][1]>='0') || (argv[i][1]<='9'))) &&
                  (strlen(argv[i]) == 2)))
            {
-                if(opt_recursive) {
-                    addPathToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
-                } else {
-                    addFileToZip(zf,argv[i],password,opt_exclude_path,opt_compress_level);
+                FILE * fin;
+                size_t size_read;
+                const char* filenameinzip = argv[i];
+                const char *savefilenameinzip;
+                zip_fileinfo zi;
+                unsigned long crcFile=0;
+                int zip64 = 0;
+
+                zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
+                zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
+                zi.dosDate = 0;
+                zi.internal_fa = 0;
+                zi.external_fa = 0;
+                filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);
+
+/*
+                err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
+                                 NULL,0,NULL,0,NULL / * comment * /,
+                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                                 opt_compress_level);
+*/
+                if ((password != NULL) && (err==ZIP_OK))
+                    err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);
+
+                zip64 = isLargeFile(filenameinzip);
+
+                                                         /* The path name saved, should not include a leading slash. */
+               /*if it did, windows/xp and dynazip couldn't read the zip file. */
+                 savefilenameinzip = filenameinzip;
+                 while( savefilenameinzip[0] == '\\' || savefilenameinzip[0] == '/' )
+                 {
+                     savefilenameinzip++;
+                 }
+
+                 /*should the zip file contain any path at all?*/
+                 if( opt_exclude_path )
+                 {
+                     const char *tmpptr;
+                     const char *lastslash = 0;
+                     for( tmpptr = savefilenameinzip; *tmpptr; tmpptr++)
+                     {
+                         if( *tmpptr == '\\' || *tmpptr == '/')
+                         {
+                             lastslash = tmpptr;
+                         }
+                     }
+                     if( lastslash != NULL )
+                     {
+                         savefilenameinzip = lastslash+1; // base filename follows last slash.
+                     }
+                 }
+
+                 /**/
+                err = zipOpenNewFileInZip3_64(zf,savefilenameinzip,&zi,
+                                 NULL,0,NULL,0,NULL /* comment*/,
+                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
+                                 opt_compress_level,0,
+                                 /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
+                                 -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
+                                 password,crcFile, zip64);
+
+                if (err != ZIP_OK)
+                    printf("error in opening %s in zipfile\n",filenameinzip);
+                else
+                {
+                    fin = FOPEN_FUNC(filenameinzip,"rb");
+                    if (fin==NULL)
+                    {
+                        err=ZIP_ERRNO;
+                        printf("error in opening %s for reading\n",filenameinzip);
+                    }
+                }
+
+                if (err == ZIP_OK)
+                    do
+                    {
+                        err = ZIP_OK;
+                        size_read = fread(buf,1,size_buf,fin);
+                        if (size_read < size_buf)
+                            if (feof(fin)==0)
+                        {
+                            printf("error in reading %s\n",filenameinzip);
+                            err = ZIP_ERRNO;
+                        }
+
+                        if (size_read>0)
+                        {
+                            err = zipWriteInFileInZip (zf,buf,(unsigned)size_read);
+                            if (err<0)
+                            {
+                                printf("error in writing %s in the zipfile\n",
+                                                 filenameinzip);
+                            }
+
+                        }
+                    } while ((err == ZIP_OK) && (size_read>0));
+
+                if (fin)
+                    fclose(fin);
+
+                if (err<0)
+                    err=ZIP_ERRNO;
+                else
+                {
+                    err = zipCloseFileInZip(zf);
+                    if (err!=ZIP_OK)
+                        printf("error in closing %s in the zipfile\n",
+                                    filenameinzip);
                }
            }
        }
@@ -1,816 +0,0 @@
-/*
-Copyright (c) 2013-2017, tinydir authors:
- Cong Xu
- Lautis Sun
- Baudouin Feildel
- Andargor <andargor@yahoo.com>
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-1. Redistributions of source code must retain the above copyright notice, this
-   list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright notice,
-   this list of conditions and the following disclaimer in the documentation
-   and/or other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-#ifndef TINYDIR_H
-#define TINYDIR_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if ((defined _UNICODE) && !(defined UNICODE))
-#define UNICODE
-#endif
-
-#if ((defined UNICODE) && !(defined _UNICODE))
-#define _UNICODE
-#endif
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#ifdef _MSC_VER
-# define WIN32_LEAN_AND_MEAN
-# include <windows.h>
-# include <tchar.h>
-# pragma warning(push)
-# pragma warning (disable : 4996)
-#else
-# include <dirent.h>
-# include <libgen.h>
-# include <sys/stat.h>
-# include <stddef.h>
-#endif
-#ifdef __MINGW32__
-# include <tchar.h>
-#endif
-
-
-/* types */
-
-/* Windows UNICODE wide character support */
-#if defined _MSC_VER || defined __MINGW32__
-# define _tinydir_char_t TCHAR
-# define TINYDIR_STRING(s) _TEXT(s)
-# define _tinydir_strlen _tcslen
-# define _tinydir_strcpy _tcscpy
-# define _tinydir_strcat _tcscat
-# define _tinydir_strcmp _tcscmp
-# define _tinydir_strrchr _tcsrchr
-# define _tinydir_strncmp _tcsncmp
-#else
-# define _tinydir_char_t char
-# define TINYDIR_STRING(s) s
-# define _tinydir_strlen strlen
-# define _tinydir_strcpy strcpy
-# define _tinydir_strcat strcat
-# define _tinydir_strcmp strcmp
-# define _tinydir_strrchr strrchr
-# define _tinydir_strncmp strncmp
-#endif
-
-#if (defined _MSC_VER || defined __MINGW32__)
-# include <windows.h>
-# define _TINYDIR_PATH_MAX MAX_PATH
-#elif defined  __linux__
-# include <limits.h>
-# define _TINYDIR_PATH_MAX PATH_MAX
-#elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-# include <sys/param.h>
-# if defined(BSD)
-#  include <limits.h>
-#  define _TINYDIR_PATH_MAX PATH_MAX
-# endif
-#endif
-
-#ifndef _TINYDIR_PATH_MAX
-#define _TINYDIR_PATH_MAX 4096
-#endif
-
-#ifdef _MSC_VER
-/* extra chars for the "\\*" mask */
-# define _TINYDIR_PATH_EXTRA 2
-#else
-# define _TINYDIR_PATH_EXTRA 0
-#endif
-
-#define _TINYDIR_FILENAME_MAX 256
-
-#if (defined _MSC_VER || defined __MINGW32__)
-#define _TINYDIR_DRIVE_MAX 3
-#endif
-
-#ifdef _MSC_VER
-# define _TINYDIR_FUNC static __inline
-#elif !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
-# define _TINYDIR_FUNC static __inline__
-#else
-# define _TINYDIR_FUNC static inline
-#endif
-
-/* readdir_r usage; define TINYDIR_USE_READDIR_R to use it (if supported) */
-#ifdef TINYDIR_USE_READDIR_R
-
-/* readdir_r is a POSIX-only function, and may not be available under various
- * environments/settings, e.g. MinGW. Use readdir fallback */
-#if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE ||\
-	_POSIX_SOURCE
-# define _TINYDIR_HAS_READDIR_R
-#endif
-#if _POSIX_C_SOURCE >= 200112L
-# define _TINYDIR_HAS_FPATHCONF
-# include <unistd.h>
-#endif
-#if _BSD_SOURCE || _SVID_SOURCE || \
-	(_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
-# define _TINYDIR_HAS_DIRFD
-# include <sys/types.h>
-#endif
-#if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD &&\
-	defined _PC_NAME_MAX
-# define _TINYDIR_USE_FPATHCONF
-#endif
-#if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R ||\
-	!(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX)
-# define _TINYDIR_USE_READDIR
-#endif
-
-/* Use readdir by default */
-#else
-# define _TINYDIR_USE_READDIR
-#endif
-
-/* MINGW32 has two versions of dirent, ASCII and UNICODE*/
-#ifndef _MSC_VER
-#if (defined __MINGW32__) && (defined _UNICODE)
-#define _TINYDIR_DIR _WDIR
-#define _tinydir_dirent _wdirent
-#define _tinydir_opendir _wopendir
-#define _tinydir_readdir _wreaddir
-#define _tinydir_closedir _wclosedir
-#else
-#define _TINYDIR_DIR DIR
-#define _tinydir_dirent dirent
-#define _tinydir_opendir opendir
-#define _tinydir_readdir readdir
-#define _tinydir_closedir closedir
-#endif
-#endif
-
-/* Allow user to use a custom allocator by defining _TINYDIR_MALLOC and _TINYDIR_FREE. */
-#if    defined(_TINYDIR_MALLOC) &&  defined(_TINYDIR_FREE)
-#elif !defined(_TINYDIR_MALLOC) && !defined(_TINYDIR_FREE)
-#else
-#error "Either define both alloc and free or none of them!"
-#endif
-
-#if !defined(_TINYDIR_MALLOC)
-	#define _TINYDIR_MALLOC(_size) malloc(_size)
-	#define _TINYDIR_FREE(_ptr)    free(_ptr)
-#endif /* !defined(_TINYDIR_MALLOC) */
-
-typedef struct tinydir_file
-{
-	_tinydir_char_t path[_TINYDIR_PATH_MAX];
-	_tinydir_char_t name[_TINYDIR_FILENAME_MAX];
-	_tinydir_char_t *extension;
-	int is_dir;
-	int is_reg;
-
-#ifndef _MSC_VER
-#ifdef __MINGW32__
-	struct _stat _s;
-#else
-	struct stat _s;
-#endif
-#endif
-} tinydir_file;
-
-typedef struct tinydir_dir
-{
-	_tinydir_char_t path[_TINYDIR_PATH_MAX];
-	int has_next;
-	size_t n_files;
-
-	tinydir_file *_files;
-#ifdef _MSC_VER
-	HANDLE _h;
-	WIN32_FIND_DATA _f;
-#else
-	_TINYDIR_DIR *_d;
-	struct _tinydir_dirent *_e;
-#ifndef _TINYDIR_USE_READDIR
-	struct _tinydir_dirent *_ep;
-#endif
-#endif
-} tinydir_dir;
-
-
-/* declarations */
-
-_TINYDIR_FUNC
-int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path);
-_TINYDIR_FUNC
-int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path);
-_TINYDIR_FUNC
-void tinydir_close(tinydir_dir *dir);
-
-_TINYDIR_FUNC
-int tinydir_next(tinydir_dir *dir);
-_TINYDIR_FUNC
-int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file);
-_TINYDIR_FUNC
-int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i);
-_TINYDIR_FUNC
-int tinydir_open_subdir_n(tinydir_dir *dir, size_t i);
-
-_TINYDIR_FUNC
-int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path);
-_TINYDIR_FUNC
-void _tinydir_get_ext(tinydir_file *file);
-_TINYDIR_FUNC
-int _tinydir_file_cmp(const void *a, const void *b);
-#ifndef _MSC_VER
-#ifndef _TINYDIR_USE_READDIR
-_TINYDIR_FUNC
-size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp);
-#endif
-#endif
-
-
-/* definitions*/
-
-_TINYDIR_FUNC
-int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path)
-{
-#ifndef _MSC_VER
-#ifndef _TINYDIR_USE_READDIR
-	int error;
-	int size;	/* using int size */
-#endif
-#else
-	_tinydir_char_t path_buf[_TINYDIR_PATH_MAX];
-#endif
-	_tinydir_char_t *pathp;
-
-	if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
-	{
-		errno = ENAMETOOLONG;
-		return -1;
-	}
-
-	/* initialise dir */
-	dir->_files = NULL;
-#ifdef _MSC_VER
-	dir->_h = INVALID_HANDLE_VALUE;
-#else
-	dir->_d = NULL;
-#ifndef _TINYDIR_USE_READDIR
-	dir->_ep = NULL;
-#endif
-#endif
-	tinydir_close(dir);
-
-	_tinydir_strcpy(dir->path, path);
-	/* Remove trailing slashes */
-	pathp = &dir->path[_tinydir_strlen(dir->path) - 1];
-	while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/')))
-	{
-		*pathp = TINYDIR_STRING('\0');
-		pathp++;
-	}
-#ifdef _MSC_VER
-	_tinydir_strcpy(path_buf, dir->path);
-	_tinydir_strcat(path_buf, TINYDIR_STRING("\\*"));
-#if (defined WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
-	dir->_h = FindFirstFileEx(path_buf, FindExInfoStandard, &dir->_f, FindExSearchNameMatch, NULL, 0);
-#else
-	dir->_h = FindFirstFile(path_buf, &dir->_f);
-#endif
-	if (dir->_h == INVALID_HANDLE_VALUE)
-	{
-		errno = ENOENT;
-#else
-	dir->_d = _tinydir_opendir(path);
-	if (dir->_d == NULL)
-	{
-#endif
-		goto bail;
-	}
-
-	/* read first file */
-	dir->has_next = 1;
-#ifndef _MSC_VER
-#ifdef _TINYDIR_USE_READDIR
-	dir->_e = _tinydir_readdir(dir->_d);
-#else
-	/* allocate dirent buffer for readdir_r */
-	size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */
-	if (size == -1) return -1;
-	dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size);
-	if (dir->_ep == NULL) return -1;
-
-	error = readdir_r(dir->_d, dir->_ep, &dir->_e);
-	if (error != 0) return -1;
-#endif
-	if (dir->_e == NULL)
-	{
-		dir->has_next = 0;
-	}
-#endif
-
-	return 0;
-
-bail:
-	tinydir_close(dir);
-	return -1;
-}
-
-_TINYDIR_FUNC
-int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path)
-{
-	/* Count the number of files first, to pre-allocate the files array */
-	size_t n_files = 0;
-	if (tinydir_open(dir, path) == -1)
-	{
-		return -1;
-	}
-	while (dir->has_next)
-	{
-		n_files++;
-		if (tinydir_next(dir) == -1)
-		{
-			goto bail;
-		}
-	}
-	tinydir_close(dir);
-
-	if (tinydir_open(dir, path) == -1)
-	{
-		return -1;
-	}
-
-	dir->n_files = 0;
-	dir->_files = (tinydir_file *)_TINYDIR_MALLOC(sizeof *dir->_files * n_files);
-	if (dir->_files == NULL)
-	{
-		goto bail;
-	}
-	while (dir->has_next)
-	{
-		tinydir_file *p_file;
-		dir->n_files++;
-
-		p_file = &dir->_files[dir->n_files - 1];
-		if (tinydir_readfile(dir, p_file) == -1)
-		{
-			goto bail;
-		}
-
-		if (tinydir_next(dir) == -1)
-		{
-			goto bail;
-		}
-
-		/* Just in case the number of files has changed between the first and
-		second reads, terminate without writing into unallocated memory */
-		if (dir->n_files == n_files)
-		{
-			break;
-		}
-	}
-
-	qsort(dir->_files, dir->n_files, sizeof(tinydir_file), _tinydir_file_cmp);
-
-	return 0;
-
-bail:
-	tinydir_close(dir);
-	return -1;
-}
-
-_TINYDIR_FUNC
-void tinydir_close(tinydir_dir *dir)
-{
-	if (dir == NULL)
-	{
-		return;
-	}
-
-	memset(dir->path, 0, sizeof(dir->path));
-	dir->has_next = 0;
-	dir->n_files = 0;
-	_TINYDIR_FREE(dir->_files);
-	dir->_files = NULL;
-#ifdef _MSC_VER
-	if (dir->_h != INVALID_HANDLE_VALUE)
-	{
-		FindClose(dir->_h);
-	}
-	dir->_h = INVALID_HANDLE_VALUE;
-#else
-	if (dir->_d)
-	{
-		_tinydir_closedir(dir->_d);
-	}
-	dir->_d = NULL;
-	dir->_e = NULL;
-#ifndef _TINYDIR_USE_READDIR
-	_TINYDIR_FREE(dir->_ep);
-	dir->_ep = NULL;
-#endif
-#endif
-}
-
-_TINYDIR_FUNC
-int tinydir_next(tinydir_dir *dir)
-{
-	if (dir == NULL)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	if (!dir->has_next)
-	{
-		errno = ENOENT;
-		return -1;
-	}
-
-#ifdef _MSC_VER
-	if (FindNextFile(dir->_h, &dir->_f) == 0)
-#else
-#ifdef _TINYDIR_USE_READDIR
-	dir->_e = _tinydir_readdir(dir->_d);
-#else
-	if (dir->_ep == NULL)
-	{
-		return -1;
-	}
-	if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0)
-	{
-		return -1;
-	}
-#endif
-	if (dir->_e == NULL)
-#endif
-	{
-		dir->has_next = 0;
-#ifdef _MSC_VER
-		if (GetLastError() != ERROR_SUCCESS &&
-			GetLastError() != ERROR_NO_MORE_FILES)
-		{
-			tinydir_close(dir);
-			errno = EIO;
-			return -1;
-		}
-#endif
-	}
-
-	return 0;
-}
-
-_TINYDIR_FUNC
-int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file)
-{
-	if (dir == NULL || file == NULL)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-#ifdef _MSC_VER
-	if (dir->_h == INVALID_HANDLE_VALUE)
-#else
-	if (dir->_e == NULL)
-#endif
-	{
-		errno = ENOENT;
-		return -1;
-	}
-	if (_tinydir_strlen(dir->path) +
-		_tinydir_strlen(
-#ifdef _MSC_VER
-			dir->_f.cFileName
-#else
-			dir->_e->d_name
-#endif
-		) + 1 + _TINYDIR_PATH_EXTRA >=
-		_TINYDIR_PATH_MAX)
-	{
-		/* the path for the file will be too long */
-		errno = ENAMETOOLONG;
-		return -1;
-	}
-	if (_tinydir_strlen(
-#ifdef _MSC_VER
-			dir->_f.cFileName
-#else
-			dir->_e->d_name
-#endif
-		) >= _TINYDIR_FILENAME_MAX)
-	{
-		errno = ENAMETOOLONG;
-		return -1;
-	}
-
-	_tinydir_strcpy(file->path, dir->path);
-	_tinydir_strcat(file->path, TINYDIR_STRING("/"));
-	_tinydir_strcpy(file->name,
-#ifdef _MSC_VER
-		dir->_f.cFileName
-#else
-		dir->_e->d_name
-#endif
-	);
-	_tinydir_strcat(file->path, file->name);
-#ifndef _MSC_VER
-#ifdef __MINGW32__
-	if (_tstat(
-#else
-	if (stat(
-#endif
-		file->path, &file->_s) == -1)
-	{
-		return -1;
-	}
-#endif
-	_tinydir_get_ext(file);
-
-	file->is_dir =
-#ifdef _MSC_VER
-		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
-#else
-		S_ISDIR(file->_s.st_mode);
-#endif
-	file->is_reg =
-#ifdef _MSC_VER
-		!!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) ||
-		(
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) &&
-#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) &&
-#endif
-#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) &&
-#endif
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) &&
-			!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY));
-#else
-		S_ISREG(file->_s.st_mode);
-#endif
-
-	return 0;
-}
-
-_TINYDIR_FUNC
-int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i)
-{
-	if (dir == NULL || file == NULL)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	if (i >= dir->n_files)
-	{
-		errno = ENOENT;
-		return -1;
-	}
-
-	memcpy(file, &dir->_files[i], sizeof(tinydir_file));
-	_tinydir_get_ext(file);
-
-	return 0;
-}
-
-_TINYDIR_FUNC
-int tinydir_open_subdir_n(tinydir_dir *dir, size_t i)
-{
-	_tinydir_char_t path[_TINYDIR_PATH_MAX];
-	if (dir == NULL)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	if (i >= dir->n_files || !dir->_files[i].is_dir)
-	{
-		errno = ENOENT;
-		return -1;
-	}
-
-	_tinydir_strcpy(path, dir->_files[i].path);
-	tinydir_close(dir);
-	if (tinydir_open_sorted(dir, path) == -1)
-	{
-		return -1;
-	}
-
-	return 0;
-}
-
-/* Open a single file given its path */
-_TINYDIR_FUNC
-int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path)
-{
-	tinydir_dir dir;
-	int result = 0;
-	int found = 0;
-	_tinydir_char_t dir_name_buf[_TINYDIR_PATH_MAX];
-	_tinydir_char_t file_name_buf[_TINYDIR_FILENAME_MAX];
-	_tinydir_char_t *dir_name;
-	_tinydir_char_t *base_name;
-#if (defined _MSC_VER || defined __MINGW32__)
-	_tinydir_char_t drive_buf[_TINYDIR_PATH_MAX];
-	_tinydir_char_t ext_buf[_TINYDIR_FILENAME_MAX];
-#endif
-
-	if (file == NULL || path == NULL || _tinydir_strlen(path) == 0)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX)
-	{
-		errno = ENAMETOOLONG;
-		return -1;
-	}
-
-	/* Get the parent path */
-#if (defined _MSC_VER || defined __MINGW32__)
-#if ((defined _MSC_VER) && (_MSC_VER >= 1400))
-		_tsplitpath_s(
-			path,
-			drive_buf, _TINYDIR_DRIVE_MAX,
-			dir_name_buf, _TINYDIR_FILENAME_MAX,
-			file_name_buf, _TINYDIR_FILENAME_MAX,
-			ext_buf, _TINYDIR_FILENAME_MAX);
-#else
-		_tsplitpath(
-			path,
-			drive_buf,
-			dir_name_buf,
-			file_name_buf,
-			ext_buf);
-#endif
-
-/* _splitpath_s not work fine with only filename and widechar support */
-#ifdef _UNICODE
-		if (drive_buf[0] == L'\xFEFE')
-			drive_buf[0] = '\0';
-		if (dir_name_buf[0] == L'\xFEFE')
-			dir_name_buf[0] = '\0';
-#endif
-
-	if (errno)
-	{
-		errno = EINVAL;
-		return -1;
-	}
-	/* Emulate the behavior of dirname by returning "." for dir name if it's
-	empty */
-	if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0')
-	{
-		_tinydir_strcpy(dir_name_buf, TINYDIR_STRING("."));
-	}
-	/* Concatenate the drive letter and dir name to form full dir name */
-	_tinydir_strcat(drive_buf, dir_name_buf);
-	dir_name = drive_buf;
-	/* Concatenate the file name and extension to form base name */
-	_tinydir_strcat(file_name_buf, ext_buf);
-	base_name = file_name_buf;
-#else
-	_tinydir_strcpy(dir_name_buf, path);
-	dir_name = dirname(dir_name_buf);
-	_tinydir_strcpy(file_name_buf, path);
-	base_name =basename(file_name_buf);
-#endif
-
-	/* Open the parent directory */
-	if (tinydir_open(&dir, dir_name) == -1)
-	{
-		return -1;
-	}
-
-	/* Read through the parent directory and look for the file */
-	while (dir.has_next)
-	{
-		if (tinydir_readfile(&dir, file) == -1)
-		{
-			result = -1;
-			goto bail;
-		}
-		if (_tinydir_strcmp(file->name, base_name) == 0)
-		{
-			/* File found */
-			found = 1;
-			break;
-		}
-		tinydir_next(&dir);
-	}
-	if (!found)
-	{
-		result = -1;
-		errno = ENOENT;
-	}
-
-bail:
-	tinydir_close(&dir);
-	return result;
-}
-
-_TINYDIR_FUNC
-void _tinydir_get_ext(tinydir_file *file)
-{
-	_tinydir_char_t *period = _tinydir_strrchr(file->name, TINYDIR_STRING('.'));
-	if (period == NULL)
-	{
-		file->extension = &(file->name[_tinydir_strlen(file->name)]);
-	}
-	else
-	{
-		file->extension = period + 1;
-	}
-}
-
-_TINYDIR_FUNC
-int _tinydir_file_cmp(const void *a, const void *b)
-{
-	const tinydir_file *fa = (const tinydir_file *)a;
-	const tinydir_file *fb = (const tinydir_file *)b;
-	if (fa->is_dir != fb->is_dir)
-	{
-		return -(fa->is_dir - fb->is_dir);
-	}
-	return _tinydir_strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX);
-}
-
-#ifndef _MSC_VER
-#ifndef _TINYDIR_USE_READDIR
-/*
-The following authored by Ben Hutchings <ben@decadent.org.uk>
-from https://womble.decadent.org.uk/readdir_r-advisory.html
-*/
-/* Calculate the required buffer size (in bytes) for directory      *
-* entries read from the given directory handle.  Return -1 if this  *
-* this cannot be done.                                              *
-*                                                                   *
-* This code does not trust values of NAME_MAX that are less than    *
-* 255, since some systems (including at least HP-UX) incorrectly    *
-* define it to be a smaller value.                                  */
-_TINYDIR_FUNC
-size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp)
-{
-	long name_max;
-	size_t name_end;
-	/* parameter may be unused */
-	(void)dirp;
-
-#if defined _TINYDIR_USE_FPATHCONF
-	name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX);
-	if (name_max == -1)
-#if defined(NAME_MAX)
-		name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
-#else
-		return (size_t)(-1);
-#endif
-#elif defined(NAME_MAX)
- 	name_max = (NAME_MAX > 255) ? NAME_MAX : 255;
-#else
-#error "buffer size for readdir_r cannot be determined"
-#endif
-	name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1;
-	return (name_end > sizeof(struct _tinydir_dirent) ?
-		name_end : sizeof(struct _tinydir_dirent));
-}
-#endif
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-
-# if defined (_MSC_VER)
-# pragma warning(pop)
-# endif
-
-#endif
@@ -455,7 +455,7 @@ local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
            if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
                ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
            {
-                uPosFound = uReadPos+i;
+                uPosFound = uReadPos+(unsigned)i;
                break;
            }

@@ -523,7 +523,7 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
            if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
                ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
            {
-                uPosFound = uReadPos+i;
+                uPosFound = uReadPos+(unsigned)i;
                break;
            }

@@ -853,13 +853,13 @@ local void unz64local_DosDateToTmuDate (ZPOS64_T ulDosDate, tm_unz* ptm)
 {
    ZPOS64_T uDate;
    uDate = (ZPOS64_T)(ulDosDate>>16);
-    ptm->tm_mday = (uInt)(uDate&0x1f) ;
-    ptm->tm_mon =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;
-    ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
+    ptm->tm_mday = (int)(uDate&0x1f) ;
+    ptm->tm_mon =  (int)((((uDate)&0x1E0)/0x20)-1) ;
+    ptm->tm_year = (int)(((uDate&0x0FE00)/0x0200)+1980) ;

-    ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
-    ptm->tm_min =  (uInt) ((ulDosDate&0x7E0)/0x20) ;
-    ptm->tm_sec =  (uInt) (2*(ulDosDate&0x1f)) ;
+    ptm->tm_hour = (int) ((ulDosDate &0xF800)/0x800);
+    ptm->tm_min =  (int) ((ulDosDate&0x7E0)/0x20) ;
+    ptm->tm_sec =  (int) (2*(ulDosDate&0x1f)) ;
 }

 /*
@@ -993,7 +993,7 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,

        if (lSeek!=0)
        {
-            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                lSeek=0;
            else
                err=UNZ_ERRNO;
@@ -1018,7 +1018,7 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,

        if (lSeek!=0)
        {
-            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                lSeek=0;
            else
                err=UNZ_ERRNO;
@@ -1090,7 +1090,7 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,

        if (lSeek!=0)
        {
-            if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
+            if (ZSEEK64(s->z_filefunc, s->filestream,(ZPOS64_T)lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
                lSeek=0;
            else
                err=UNZ_ERRNO;
@@ -1767,7 +1767,7 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)

            if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
                (pfile_in_zip_read_info->rest_read_compressed == 0))
-                return (iRead==0) ? UNZ_EOF : iRead;
+                return (iRead==0) ? UNZ_EOF : (int)iRead;

            if (pfile_in_zip_read_info->stream.avail_out <
                            pfile_in_zip_read_info->stream.avail_in)
@@ -1857,6 +1857,9 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
              err = Z_DATA_ERROR;

            uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
+            /* Detect overflow, because z_stream.total_out is uLong (32 bits) */
+            if (uTotalOutAfter<uTotalOutBefore)
+                uTotalOutAfter += 1LL << 32; /* Add maximum value of uLong + 1 */
            uOutThis = uTotalOutAfter-uTotalOutBefore;

            pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
@@ -1871,14 +1874,14 @@ extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
            iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);

            if (err==Z_STREAM_END)
-                return (iRead==0) ? UNZ_EOF : iRead;
+                return (iRead==0) ? UNZ_EOF : (int)iRead;
            if (err!=Z_OK)
                break;
        }
    }

    if (err==Z_OK)
-        return iRead;
+        return (int)iRead;
    return err;
 }

@@ -83,12 +83,12 @@ typedef voidp unzFile;
 /* tm_unz contain date/time info */
 typedef struct tm_unz_s
 {
-    uInt tm_sec;            /* seconds after the minute - [0,59] */
-    uInt tm_min;            /* minutes after the hour - [0,59] */
-    uInt tm_hour;           /* hours since midnight - [0,23] */
-    uInt tm_mday;           /* day of the month - [1,31] */
-    uInt tm_mon;            /* months since January - [0,11] */
-    uInt tm_year;           /* years - [1980..2044] */
+    int tm_sec;             /* seconds after the minute - [0,59] */
+    int tm_min;             /* minutes after the hour - [0,59] */
+    int tm_hour;            /* hours since midnight - [0,23] */
+    int tm_mday;            /* day of the month - [1,31] */
+    int tm_mon;             /* months since January - [0,11] */
+    int tm_year;            /* years - [1980..2044] */
 } tm_unz;

 /* unz_global_info structure contain global data about the ZIPfile
@@ -158,7 +158,7 @@ typedef struct
 #ifndef NOCRYPT
    unsigned long keys[3];     /* keys defining the pseudo-random sequence */
    const z_crc_t* pcrc_32_tab;
-    int crypt_header_size;
+    unsigned crypt_header_size;
 #endif
 } curfile64_info;

@@ -301,7 +301,7 @@ local int zip64local_putValue (const zlib_filefunc64_32_def* pzlib_filefunc_def,
        }
      }

-    if (ZWRITE64(*pzlib_filefunc_def,filestream,buf,nbByte)!=(uLong)nbByte)
+    if (ZWRITE64(*pzlib_filefunc_def,filestream,buf,(uLong)nbByte)!=(uLong)nbByte)
        return ZIP_ERRNO;
    else
        return ZIP_OK;
@@ -337,8 +337,8 @@ local uLong zip64local_TmzDateToDosDate(const tm_zip* ptm)
    else if (year>=80)
        year-=80;
    return
-      (uLong) (((ptm->tm_mday) + (32 * (ptm->tm_mon+1)) + (512 * year)) << 16) |
-        ((ptm->tm_sec/2) + (32* ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
+      (uLong) (((uLong)(ptm->tm_mday) + (32 * (uLong)(ptm->tm_mon+1)) + (512 * year)) << 16) |
+        (((uLong)ptm->tm_sec/2) + (32 * (uLong)ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
 }


@@ -522,12 +522,12 @@ local ZPOS64_T zip64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_f
      if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
        ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
      {
-        uPosFound = uReadPos+i;
+        uPosFound = uReadPos+(unsigned)i;
        break;
      }

-      if (uPosFound!=0)
-        break;
+    if (uPosFound!=0)
+      break;
  }
  TRYFREE(buf);
  return uPosFound;
@@ -586,7 +586,7 @@ local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
      // Signature "0x07064b50" Zip64 end of central directory locater
      if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
      {
-        uPosFound = uReadPos+i;
+        uPosFound = uReadPos+(unsigned)i;
        break;
      }
    }
@@ -637,7 +637,7 @@ local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
  return relativeOffset;
 }

-int LoadCentralDirectoryRecord(zip64_internal* pziinit)
+local int LoadCentralDirectoryRecord(zip64_internal* pziinit)
 {
  int err=ZIP_OK;
  ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
@@ -955,7 +955,7 @@ extern zipFile ZEXPORT zipOpen64 (const void* pathname, int append)
    return zipOpen3(pathname,append,NULL,NULL);
 }

-int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
+local int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
 {
  /* write the local header */
  int err;
@@ -1034,8 +1034,8 @@ int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_ex
      // Remember position of Zip64 extended info for the local file header. (needed when we update size after done with file)
      zi->ci.pos_zip64extrainfo = ZTELL64(zi->z_filefunc,zi->filestream);

-      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (short)HeaderID,2);
-      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (short)DataSize,2);
+      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)HeaderID,2);
+      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)DataSize,2);

      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)UncompressedSize,8);
      err = zip64local_putValue(&zi->z_filefunc, zi->filestream, (ZPOS64_T)CompressedSize,8);
@@ -1516,7 +1516,7 @@ extern int ZEXPORT zipCloseFileInZipRaw64 (zipFile file, ZPOS64_T uncompressed_s
    zip64_internal* zi;
    ZPOS64_T compressed_size;
    uLong invalidValue = 0xffffffff;
-    short datasize = 0;
+    unsigned datasize = 0;
    int err=ZIP_OK;

    if (file == NULL)
@@ -1752,7 +1752,7 @@ extern int ZEXPORT zipCloseFileInZip (zipFile file)
    return zipCloseFileInZipRaw (file,0,0);
 }

-int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
 {
  int err = ZIP_OK;
  ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writing_offset;
@@ -1774,7 +1774,7 @@ int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eo
    return err;
 }

-int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+local int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
  int err = ZIP_OK;

@@ -1813,7 +1813,7 @@ int Write_Zip64EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centra
  }
  return err;
 }
-int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
+local int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir, ZPOS64_T centraldir_pos_inzip)
 {
  int err = ZIP_OK;

@@ -1861,7 +1861,7 @@ int Write_EndOfCentralDirectoryRecord(zip64_internal* zi, uLong size_centraldir,
   return err;
 }

-int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
+local int Write_GlobalComment(zip64_internal* zi, const char* global_comment)
 {
  int err = ZIP_OK;
  uInt size_global_comment = 0;
@@ -1962,7 +1962,7 @@ extern int ZEXPORT zipRemoveExtraInfoBlock (char* pData, int* dataLen, short sHe
  if(pData == NULL || *dataLen < 4)
    return ZIP_PARAMERROR;

-  pNewHeader = (char*)ALLOC(*dataLen);
+  pNewHeader = (char*)ALLOC((unsigned)*dataLen);
  pTmp = pNewHeader;

  while(p < (pData + *dataLen))
@@ -88,12 +88,12 @@ typedef voidp zipFile;
 /* tm_zip contain date/time info */
 typedef struct tm_zip_s
 {
-    uInt tm_sec;            /* seconds after the minute - [0,59] */
-    uInt tm_min;            /* minutes after the hour - [0,59] */
-    uInt tm_hour;           /* hours since midnight - [0,23] */
-    uInt tm_mday;           /* day of the month - [1,31] */
-    uInt tm_mon;            /* months since January - [0,11] */
-    uInt tm_year;           /* years - [1980..2044] */
+    int tm_sec;             /* seconds after the minute - [0,59] */
+    int tm_min;             /* minutes after the hour - [0,59] */
+    int tm_hour;            /* hours since midnight - [0,23] */
+    int tm_mday;            /* day of the month - [1,31] */
+    int tm_mon;             /* months since January - [0,11] */
+    int tm_year;            /* years - [1980..2044] */
 } tm_zip;

 typedef struct
@@ -144,6 +144,11 @@ extern zipFile ZEXPORT zipOpen2_64 OF((const void *pathname,
                                   zipcharpc* globalcomment,
                                   zlib_filefunc64_def* pzlib_filefunc_def));

+extern zipFile ZEXPORT zipOpen3 OF((const void *pathname,
+                                    int append,
+                                    zipcharpc* globalcomment,
+                                    zlib_filefunc64_32_def* pzlib_filefunc64_32_def));
+
 extern int ZEXPORT zipOpenNewFileInZip OF((zipFile file,
                       const char* filename,
                       const zip_fileinfo* zipfi,
@@ -10,7 +10,7 @@ unit zlibpas;
 interface

 const
-  ZLIB_VERSION = '1.2.11';
+  ZLIB_VERSION = '1.2.12';
  ZLIB_VERNUM  = $12a0;

 type
@@ -1,275 +1,275 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <windows.h>
-
-#include "zlib.h"
-
-
-void MyDoMinus64(LARGE_INTEGER *R,LARGE_INTEGER A,LARGE_INTEGER B)
-{
-    R->HighPart = A.HighPart - B.HighPart;
-    if (A.LowPart >= B.LowPart)
-        R->LowPart = A.LowPart - B.LowPart;
-    else
-    {
-        R->LowPart = A.LowPart - B.LowPart;
-        R->HighPart --;
-    }
-}
-
-#ifdef _M_X64
-// see http://msdn2.microsoft.com/library/twchhe95(en-us,vs.80).aspx for __rdtsc
-unsigned __int64 __rdtsc(void);
-void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
-{
- //   printf("rdtsc = %I64x\n",__rdtsc());
-   pbeginTime64->QuadPart=__rdtsc();
-}
-
-LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
-{
-    LARGE_INTEGER LIres;
-    unsigned _int64 res=__rdtsc()-((unsigned _int64)(beginTime64.QuadPart));
-    LIres.QuadPart=res;
-   // printf("rdtsc = %I64x\n",__rdtsc());
-    return LIres;
-}
-#else
-#ifdef _M_IX86
-void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
-{
-    DWORD dwEdx,dwEax;
-    _asm
-    {
-        rdtsc
-        mov dwEax,eax
-        mov dwEdx,edx
-    }
-    pbeginTime64->LowPart=dwEax;
-    pbeginTime64->HighPart=dwEdx;
-}
-
-void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
-{
-    myGetRDTSC32(pbeginTime64);
-}
-
-LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
-{
-    LARGE_INTEGER LIres,endTime64;
-    myGetRDTSC32(&endTime64);
-
-    LIres.LowPart=LIres.HighPart=0;
-    MyDoMinus64(&LIres,endTime64,beginTime64);
-    return LIres;
-}
-#else
-void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
-{
-}
-
-void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
-{
-}
-
-LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
-{
-    LARGE_INTEGER lr;
-    lr.QuadPart=0;
-    return lr;
-}
-#endif
-#endif
-
-void BeginCountPerfCounter(LARGE_INTEGER * pbeginTime64,BOOL fComputeTimeQueryPerf)
-{
-    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(pbeginTime64)))
-    {
-        pbeginTime64->LowPart = GetTickCount();
-        pbeginTime64->HighPart = 0;
-    }
-}
-
-DWORD GetMsecSincePerfCounter(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
-{
-    LARGE_INTEGER endTime64,ticksPerSecond,ticks;
-    DWORDLONG ticksShifted,tickSecShifted;
-    DWORD dwLog=16+0;
-    DWORD dwRet;
-    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(&endTime64)))
-        dwRet = (GetTickCount() - beginTime64.LowPart)*1;
-    else
-    {
-        MyDoMinus64(&ticks,endTime64,beginTime64);
-        QueryPerformanceFrequency(&ticksPerSecond);
-
-
-        {
-            ticksShifted = Int64ShrlMod32(*(DWORDLONG*)&ticks,dwLog);
-            tickSecShifted = Int64ShrlMod32(*(DWORDLONG*)&ticksPerSecond,dwLog);
-
-        }
-
-        dwRet = (DWORD)((((DWORD)ticksShifted)*1000)/(DWORD)(tickSecShifted));
-        dwRet *=1;
-    }
-    return dwRet;
-}
-
-int ReadFileMemory(const char* filename,long* plFileSize,unsigned char** pFilePtr)
-{
-    FILE* stream;
-    unsigned char* ptr;
-    int retVal=1;
-    stream=fopen(filename, "rb");
-    if (stream==NULL)
-        return 0;
-
-    fseek(stream,0,SEEK_END);
-
-    *plFileSize=ftell(stream);
-    fseek(stream,0,SEEK_SET);
-    ptr=malloc((*plFileSize)+1);
-    if (ptr==NULL)
-        retVal=0;
-    else
-    {
-        if (fread(ptr, 1, *plFileSize,stream) != (*plFileSize))
-            retVal=0;
-    }
-    fclose(stream);
-    *pFilePtr=ptr;
-    return retVal;
-}
-
-int main(int argc, char *argv[])
-{
-    int BlockSizeCompress=0x8000;
-    int BlockSizeUncompress=0x8000;
-    int cprLevel=Z_DEFAULT_COMPRESSION ;
-    long lFileSize;
-    unsigned char* FilePtr;
-    long lBufferSizeCpr;
-    long lBufferSizeUncpr;
-    long lCompressedSize=0;
-    unsigned char* CprPtr;
-    unsigned char* UncprPtr;
-    long lSizeCpr,lSizeUncpr;
-    DWORD dwGetTick,dwMsecQP;
-    LARGE_INTEGER li_qp,li_rdtsc,dwResRdtsc;
-
-    if (argc<=1)
-    {
-        printf("run TestZlib <File> [BlockSizeCompress] [BlockSizeUncompress] [compres. level]\n");
-        return 0;
-    }
-
-    if (ReadFileMemory(argv[1],&lFileSize,&FilePtr)==0)
-    {
-        printf("error reading %s\n",argv[1]);
-        return 1;
-    }
-    else printf("file %s read, %u bytes\n",argv[1],lFileSize);
-
-    if (argc>=3)
-        BlockSizeCompress=atol(argv[2]);
-
-    if (argc>=4)
-        BlockSizeUncompress=atol(argv[3]);
-
-    if (argc>=5)
-        cprLevel=(int)atol(argv[4]);
-
-    lBufferSizeCpr = lFileSize + (lFileSize/0x10) + 0x200;
-    lBufferSizeUncpr = lBufferSizeCpr;
-
-    CprPtr=(unsigned char*)malloc(lBufferSizeCpr + BlockSizeCompress);
-
-    BeginCountPerfCounter(&li_qp,TRUE);
-    dwGetTick=GetTickCount();
-    BeginCountRdtsc(&li_rdtsc);
-    {
-        z_stream zcpr;
-        int ret=Z_OK;
-        long lOrigToDo = lFileSize;
-        long lOrigDone = 0;
-        int step=0;
-        memset(&zcpr,0,sizeof(z_stream));
-        deflateInit(&zcpr,cprLevel);
-
-        zcpr.next_in = FilePtr;
-        zcpr.next_out = CprPtr;
-
-
-        do
-        {
-            long all_read_before = zcpr.total_in;
-            zcpr.avail_in = min(lOrigToDo,BlockSizeCompress);
-            zcpr.avail_out = BlockSizeCompress;
-            ret=deflate(&zcpr,(zcpr.avail_in==lOrigToDo) ? Z_FINISH : Z_SYNC_FLUSH);
-            lOrigDone += (zcpr.total_in-all_read_before);
-            lOrigToDo -= (zcpr.total_in-all_read_before);
-            step++;
-        } while (ret==Z_OK);
-
-        lSizeCpr=zcpr.total_out;
-        deflateEnd(&zcpr);
-        dwGetTick=GetTickCount()-dwGetTick;
-        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
-        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
-        printf("total compress size = %u, in %u step\n",lSizeCpr,step);
-        printf("time = %u msec = %f sec\n",dwGetTick,dwGetTick/(double)1000.);
-        printf("defcpr time QP = %u msec = %f sec\n",dwMsecQP,dwMsecQP/(double)1000.);
-        printf("defcpr result rdtsc = %I64x\n\n",dwResRdtsc.QuadPart);
-    }
-
-    CprPtr=(unsigned char*)realloc(CprPtr,lSizeCpr);
-    UncprPtr=(unsigned char*)malloc(lBufferSizeUncpr + BlockSizeUncompress);
-
-    BeginCountPerfCounter(&li_qp,TRUE);
-    dwGetTick=GetTickCount();
-    BeginCountRdtsc(&li_rdtsc);
-    {
-        z_stream zcpr;
-        int ret=Z_OK;
-        long lOrigToDo = lSizeCpr;
-        long lOrigDone = 0;
-        int step=0;
-        memset(&zcpr,0,sizeof(z_stream));
-        inflateInit(&zcpr);
-
-        zcpr.next_in = CprPtr;
-        zcpr.next_out = UncprPtr;
-
-
-        do
-        {
-            long all_read_before = zcpr.total_in;
-            zcpr.avail_in = min(lOrigToDo,BlockSizeUncompress);
-            zcpr.avail_out = BlockSizeUncompress;
-            ret=inflate(&zcpr,Z_SYNC_FLUSH);
-            lOrigDone += (zcpr.total_in-all_read_before);
-            lOrigToDo -= (zcpr.total_in-all_read_before);
-            step++;
-        } while (ret==Z_OK);
-
-        lSizeUncpr=zcpr.total_out;
-        inflateEnd(&zcpr);
-        dwGetTick=GetTickCount()-dwGetTick;
-        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
-        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
-        printf("total uncompress size = %u, in %u step\n",lSizeUncpr,step);
-        printf("time = %u msec = %f sec\n",dwGetTick,dwGetTick/(double)1000.);
-        printf("uncpr  time QP = %u msec = %f sec\n",dwMsecQP,dwMsecQP/(double)1000.);
-        printf("uncpr  result rdtsc = %I64x\n\n",dwResRdtsc.QuadPart);
-    }
-
-    if (lSizeUncpr==lFileSize)
-    {
-        if (memcmp(FilePtr,UncprPtr,lFileSize)==0)
-            printf("compare ok\n");
-
-    }
-
-    return 0;
-}
+#include <stdio.h>
+#include <stdlib.h>
+#include <windows.h>
+
+#include "zlib.h"
+
+
+void MyDoMinus64(LARGE_INTEGER *R,LARGE_INTEGER A,LARGE_INTEGER B)
+{
+    R->HighPart = A.HighPart - B.HighPart;
+    if (A.LowPart >= B.LowPart)
+        R->LowPart = A.LowPart - B.LowPart;
+    else
+    {
+        R->LowPart = A.LowPart - B.LowPart;
+        R->HighPart --;
+    }
+}
+
+#ifdef _M_X64
+// see http://msdn2.microsoft.com/library/twchhe95(en-us,vs.80).aspx for __rdtsc
+unsigned __int64 __rdtsc(void);
+void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
+{
+ //   printf("rdtsc = %I64x\n",__rdtsc());
+   pbeginTime64->QuadPart=__rdtsc();
+}
+
+LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
+{
+    LARGE_INTEGER LIres;
+    unsigned _int64 res=__rdtsc()-((unsigned _int64)(beginTime64.QuadPart));
+    LIres.QuadPart=res;
+   // printf("rdtsc = %I64x\n",__rdtsc());
+    return LIres;
+}
+#else
+#ifdef _M_IX86
+void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
+{
+    DWORD dwEdx,dwEax;
+    _asm
+    {
+        rdtsc
+        mov dwEax,eax
+        mov dwEdx,edx
+    }
+    pbeginTime64->LowPart=dwEax;
+    pbeginTime64->HighPart=dwEdx;
+}
+
+void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
+{
+    myGetRDTSC32(pbeginTime64);
+}
+
+LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
+{
+    LARGE_INTEGER LIres,endTime64;
+    myGetRDTSC32(&endTime64);
+
+    LIres.LowPart=LIres.HighPart=0;
+    MyDoMinus64(&LIres,endTime64,beginTime64);
+    return LIres;
+}
+#else
+void myGetRDTSC32(LARGE_INTEGER * pbeginTime64)
+{
+}
+
+void BeginCountRdtsc(LARGE_INTEGER * pbeginTime64)
+{
+}
+
+LARGE_INTEGER GetResRdtsc(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
+{
+    LARGE_INTEGER lr;
+    lr.QuadPart=0;
+    return lr;
+}
+#endif
+#endif
+
+void BeginCountPerfCounter(LARGE_INTEGER * pbeginTime64,BOOL fComputeTimeQueryPerf)
+{
+    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(pbeginTime64)))
+    {
+        pbeginTime64->LowPart = GetTickCount();
+        pbeginTime64->HighPart = 0;
+    }
+}
+
+DWORD GetMsecSincePerfCounter(LARGE_INTEGER beginTime64,BOOL fComputeTimeQueryPerf)
+{
+    LARGE_INTEGER endTime64,ticksPerSecond,ticks;
+    DWORDLONG ticksShifted,tickSecShifted;
+    DWORD dwLog=16+0;
+    DWORD dwRet;
+    if ((!fComputeTimeQueryPerf) || (!QueryPerformanceCounter(&endTime64)))
+        dwRet = (GetTickCount() - beginTime64.LowPart)*1;
+    else
+    {
+        MyDoMinus64(&ticks,endTime64,beginTime64);
+        QueryPerformanceFrequency(&ticksPerSecond);
+
+
+        {
+            ticksShifted = Int64ShrlMod32(*(DWORDLONG*)&ticks,dwLog);
+            tickSecShifted = Int64ShrlMod32(*(DWORDLONG*)&ticksPerSecond,dwLog);
+
+        }
+
+        dwRet = (DWORD)((((DWORD)ticksShifted)*1000)/(DWORD)(tickSecShifted));
+        dwRet *=1;
+    }
+    return dwRet;
+}
+
+int ReadFileMemory(const char* filename,long* plFileSize,unsigned char** pFilePtr)
+{
+    FILE* stream;
+    unsigned char* ptr;
+    int retVal=1;
+    stream=fopen(filename, "rb");
+    if (stream==NULL)
+        return 0;
+
+    fseek(stream,0,SEEK_END);
+
+    *plFileSize=ftell(stream);
+    fseek(stream,0,SEEK_SET);
+    ptr=malloc((*plFileSize)+1);
+    if (ptr==NULL)
+        retVal=0;
+    else
+    {
+        if (fread(ptr, 1, *plFileSize,stream) != (*plFileSize))
+            retVal=0;
+    }
+    fclose(stream);
+    *pFilePtr=ptr;
+    return retVal;
+}
+
+int main(int argc, char *argv[])
+{
+    int BlockSizeCompress=0x8000;
+    int BlockSizeUncompress=0x8000;
+    int cprLevel=Z_DEFAULT_COMPRESSION ;
+    long lFileSize;
+    unsigned char* FilePtr;
+    long lBufferSizeCpr;
+    long lBufferSizeUncpr;
+    long lCompressedSize=0;
+    unsigned char* CprPtr;
+    unsigned char* UncprPtr;
+    long lSizeCpr,lSizeUncpr;
+    DWORD dwGetTick,dwMsecQP;
+    LARGE_INTEGER li_qp,li_rdtsc,dwResRdtsc;
+
+    if (argc<=1)
+    {
+        printf("run TestZlib <File> [BlockSizeCompress] [BlockSizeUncompress] [compres. level]\n");
+        return 0;
+    }
+
+    if (ReadFileMemory(argv[1],&lFileSize,&FilePtr)==0)
+    {
+        printf("error reading %s\n",argv[1]);
+        return 1;
+    }
+    else printf("file %s read, %u bytes\n",argv[1],lFileSize);
+
+    if (argc>=3)
+        BlockSizeCompress=atol(argv[2]);
+
+    if (argc>=4)
+        BlockSizeUncompress=atol(argv[3]);
+
+    if (argc>=5)
+        cprLevel=(int)atol(argv[4]);
+
+    lBufferSizeCpr = lFileSize + (lFileSize/0x10) + 0x200;
+    lBufferSizeUncpr = lBufferSizeCpr;
+
+    CprPtr=(unsigned char*)malloc(lBufferSizeCpr + BlockSizeCompress);
+
+    BeginCountPerfCounter(&li_qp,TRUE);
+    dwGetTick=GetTickCount();
+    BeginCountRdtsc(&li_rdtsc);
+    {
+        z_stream zcpr;
+        int ret=Z_OK;
+        long lOrigToDo = lFileSize;
+        long lOrigDone = 0;
+        int step=0;
+        memset(&zcpr,0,sizeof(z_stream));
+        deflateInit(&zcpr,cprLevel);
+
+        zcpr.next_in = FilePtr;
+        zcpr.next_out = CprPtr;
+
+
+        do
+        {
+            long all_read_before = zcpr.total_in;
+            zcpr.avail_in = min(lOrigToDo,BlockSizeCompress);
+            zcpr.avail_out = BlockSizeCompress;
+            ret=deflate(&zcpr,(zcpr.avail_in==lOrigToDo) ? Z_FINISH : Z_SYNC_FLUSH);
+            lOrigDone += (zcpr.total_in-all_read_before);
+            lOrigToDo -= (zcpr.total_in-all_read_before);
+            step++;
+        } while (ret==Z_OK);
+
+        lSizeCpr=zcpr.total_out;
+        deflateEnd(&zcpr);
+        dwGetTick=GetTickCount()-dwGetTick;
+        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
+        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
+        printf("total compress size = %u, in %u step\n",lSizeCpr,step);
+        printf("time = %u msec = %f sec\n",dwGetTick,dwGetTick/(double)1000.);
+        printf("defcpr time QP = %u msec = %f sec\n",dwMsecQP,dwMsecQP/(double)1000.);
+        printf("defcpr result rdtsc = %I64x\n\n",dwResRdtsc.QuadPart);
+    }
+
+    CprPtr=(unsigned char*)realloc(CprPtr,lSizeCpr);
+    UncprPtr=(unsigned char*)malloc(lBufferSizeUncpr + BlockSizeUncompress);
+
+    BeginCountPerfCounter(&li_qp,TRUE);
+    dwGetTick=GetTickCount();
+    BeginCountRdtsc(&li_rdtsc);
+    {
+        z_stream zcpr;
+        int ret=Z_OK;
+        long lOrigToDo = lSizeCpr;
+        long lOrigDone = 0;
+        int step=0;
+        memset(&zcpr,0,sizeof(z_stream));
+        inflateInit(&zcpr);
+
+        zcpr.next_in = CprPtr;
+        zcpr.next_out = UncprPtr;
+
+
+        do
+        {
+            long all_read_before = zcpr.total_in;
+            zcpr.avail_in = min(lOrigToDo,BlockSizeUncompress);
+            zcpr.avail_out = BlockSizeUncompress;
+            ret=inflate(&zcpr,Z_SYNC_FLUSH);
+            lOrigDone += (zcpr.total_in-all_read_before);
+            lOrigToDo -= (zcpr.total_in-all_read_before);
+            step++;
+        } while (ret==Z_OK);
+
+        lSizeUncpr=zcpr.total_out;
+        inflateEnd(&zcpr);
+        dwGetTick=GetTickCount()-dwGetTick;
+        dwMsecQP=GetMsecSincePerfCounter(li_qp,TRUE);
+        dwResRdtsc=GetResRdtsc(li_rdtsc,TRUE);
+        printf("total uncompress size = %u, in %u step\n",lSizeUncpr,step);
+        printf("time = %u msec = %f sec\n",dwGetTick,dwGetTick/(double)1000.);
+        printf("uncpr  time QP = %u msec = %f sec\n",dwMsecQP,dwMsecQP/(double)1000.);
+        printf("uncpr  result rdtsc = %I64x\n\n",dwResRdtsc.QuadPart);
+    }
+
+    if (lSizeUncpr==lFileSize)
+    {
+        if (memcmp(FilePtr,UncprPtr,lFileSize)==0)
+            printf("compare ok\n");
+
+    }
+
+    return 0;
+}
@@ -1,4 +1,4 @@
-Building instructions for the DLL versions of Zlib 1.2.11
+Building instructions for the DLL versions of Zlib 1.2.12
 ========================================================

 This directory contains projects that build zlib and minizip using
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 2, 11, 0
-  PRODUCTVERSION 1, 2, 11, 0
+  FILEVERSION	 1, 2, 12, 0
+  PRODUCTVERSION 1, 2, 12, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "FileVersion",	"1.2.12\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -151,3 +151,8 @@ EXPORTS
        deflateGetDictionary                    @173
        adler32_z                               @174
        crc32_z                                 @175
+
+; zlib1 v1.2.12 added:
+		crc32_combine_gen						@176
+		crc32_combine_gen64						@177
+		crc32_combine_op						@178
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 2, 11, 0
-  PRODUCTVERSION 1, 2, 11, 0
+  FILEVERSION	 1, 2, 12, 0
+  PRODUCTVERSION 1, 2, 12, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "FileVersion",	"1.2.12\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -151,3 +151,8 @@ EXPORTS
        deflateGetDictionary                    @173
        adler32_z                               @174
        crc32_z                                 @175
+
+; zlib1 v1.2.12 added:
+		crc32_combine_gen						@176
+		crc32_combine_gen64						@177
+		crc32_combine_op						@178
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 2, 11, 0
-  PRODUCTVERSION 1, 2, 11, 0
+  FILEVERSION	 1, 2, 12, 0
+  PRODUCTVERSION 1, 2, 12, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "FileVersion",	"1.2.12\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -151,3 +151,8 @@ EXPORTS
        deflateGetDictionary                    @173
        adler32_z                               @174
        crc32_z                                 @175
+
+; zlib1 v1.2.12 added:
+		crc32_combine_gen						@176
+		crc32_combine_gen64						@177
+		crc32_combine_op						@178
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 2, 11, 0
-  PRODUCTVERSION 1, 2, 11, 0
+  FILEVERSION	 1, 2, 12, 0
+  PRODUCTVERSION 1, 2, 12, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "FileVersion",	"1.2.12\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -151,3 +151,8 @@ EXPORTS
        deflateGetDictionary                    @173
        adler32_z                               @174
        crc32_z                                 @175
+
+; zlib1 v1.2.12 added:
+		crc32_combine_gen						@176
+		crc32_combine_gen64						@177
+		crc32_combine_op						@178
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 2, 11, 0
-  PRODUCTVERSION 1, 2, 11, 0
+  FILEVERSION	 1, 2, 12, 0
+  PRODUCTVERSION 1, 2, 12, 0
  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
  FILEFLAGS	0
  FILEOS	VOS_DOS_WINDOWS32
@@ -17,12 +17,12 @@ BEGIN

    BEGIN
      VALUE "FileDescription", "zlib data compression and ZIP file I/O library\0"
-      VALUE "FileVersion",	"1.2.11\0"
+      VALUE "FileVersion",	"1.2.12\0"
      VALUE "InternalName",	"zlib\0"
      VALUE "OriginalFilename",	"zlibwapi.dll\0"
      VALUE "ProductName",	"ZLib.DLL\0"
      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2017 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2022 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -151,3 +151,8 @@ EXPORTS
        deflateGetDictionary                    @173
        adler32_z                               @174
        crc32_z                                 @175
+
+; zlib1 v1.2.12 added:
+		crc32_combine_gen						@176
+		crc32_combine_gen64						@177
+		crc32_combine_op						@178
@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2022 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 1.2.11 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
+   " deflate 1.2.12 Copyright 1995-2022 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
@@ -190,8 +190,11 @@ local const config configuration_table[10] = {
 * prev[] will be initialized on the fly.
 */
 #define CLEAR_HASH(s) \
-    s->head[s->hash_size-1] = NIL; \
-    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+    do { \
+        s->head[s->hash_size-1] = NIL; \
+        zmemzero((Bytef *)s->head, \
+                 (unsigned)(s->hash_size-1)*sizeof(*s->head)); \
+    } while (0)

 /* ===========================================================================
 * Slide the hash table when sliding the window down (could be avoided with 32
@@ -252,11 +255,6 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
    int wrap = 1;
    static const char my_version[] = ZLIB_VERSION;

-    ushf *overlay;
-    /* We overlay pending_buf and d_buf+l_buf. This works since the average
-     * output size for (length,distance) codes is <= 24 bits.
-     */
-
    if (version == Z_NULL || version[0] != my_version[0] ||
        stream_size != sizeof(z_stream)) {
        return Z_VERSION_ERROR;
@@ -326,9 +324,47 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,

    s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */

-    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
-    s->pending_buf = (uchf *) overlay;
-    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+    /* We overlay pending_buf and sym_buf. This works since the average size
+     * for length/distance pairs over any compressed block is assured to be 31
+     * bits or less.
+     *
+     * Analysis: The longest fixed codes are a length code of 8 bits plus 5
+     * extra bits, for lengths 131 to 257. The longest fixed distance codes are
+     * 5 bits plus 13 extra bits, for distances 16385 to 32768. The longest
+     * possible fixed-codes length/distance pair is then 31 bits total.
+     *
+     * sym_buf starts one-fourth of the way into pending_buf. So there are
+     * three bytes in sym_buf for every four bytes in pending_buf. Each symbol
+     * in sym_buf is three bytes -- two for the distance and one for the
+     * literal/length. As each symbol is consumed, the pointer to the next
+     * sym_buf value to read moves forward three bytes. From that symbol, up to
+     * 31 bits are written to pending_buf. The closest the written pending_buf
+     * bits gets to the next sym_buf symbol to read is just before the last
+     * code is written. At that time, 31*(n-2) bits have been written, just
+     * after 24*(n-2) bits have been consumed from sym_buf. sym_buf starts at
+     * 8*n bits into pending_buf. (Note that the symbol buffer fills when n-1
+     * symbols are written.) The closest the writing gets to what is unread is
+     * then n+14 bits. Here n is lit_bufsize, which is 16384 by default, and
+     * can range from 128 to 32768.
+     *
+     * Therefore, at a minimum, there are 142 bits of space between what is
+     * written and what is read in the overlain buffers, so the symbols cannot
+     * be overwritten by the compressed data. That space is actually 139 bits,
+     * due to the three-bit fixed-code block header.
+     *
+     * That covers the case where either Z_FIXED is specified, forcing fixed
+     * codes, or when the use of fixed codes is chosen, because that choice
+     * results in a smaller compressed block than dynamic codes. That latter
+     * condition then assures that the above analysis also covers all dynamic
+     * blocks. A dynamic-code block will only be chosen to be emitted if it has
+     * fewer bits than a fixed-code block would for the same set of symbols.
+     * Therefore its average symbol length is assured to be less than 31. So
+     * the compressed data for a dynamic block also cannot overwrite the
+     * symbols from which it is being constructed.
+     */
+
+    s->pending_buf = (uchf *) ZALLOC(strm, s->lit_bufsize, 4);
+    s->pending_buf_size = (ulg)s->lit_bufsize * 4;

    if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
        s->pending_buf == Z_NULL) {
@@ -337,8 +373,12 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
        deflateEnd (strm);
        return Z_MEM_ERROR;
    }
-    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
-    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+    s->sym_buf = s->pending_buf + s->lit_bufsize;
+    s->sym_end = (s->lit_bufsize - 1) * 3;
+    /* We avoid equality with lit_bufsize*3 because of wraparound at 64K
+     * on 16 bit machines and because stored blocks are restricted to
+     * 64K-1 bytes.
+     */

    s->level = level;
    s->strategy = strategy;
@@ -488,13 +528,13 @@ int ZEXPORT deflateResetKeep (strm)
 #ifdef GZIP
        s->wrap == 2 ? GZIP_STATE :
 #endif
-        s->wrap ? INIT_STATE : BUSY_STATE;
+        INIT_STATE;
    strm->adler =
 #ifdef GZIP
        s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
 #endif
        adler32(0L, Z_NULL, 0);
-    s->last_flush = Z_NO_FLUSH;
+    s->last_flush = -2;

    _tr_init(s);

@@ -549,7 +589,8 @@ int ZEXPORT deflatePrime (strm, bits, value)

    if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
    s = strm->state;
-    if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
+    if (bits < 0 || bits > 16 ||
+        s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
        return Z_BUF_ERROR;
    do {
        put = Buf_size - s->bi_valid;
@@ -587,12 +628,12 @@ int ZEXPORT deflateParams(strm, level, strategy)
    func = configuration_table[s->level].func;

    if ((strategy != s->strategy || func != configuration_table[level].func) &&
-        s->high_water) {
+        s->last_flush != -2) {
        /* Flush the last buffer: */
        int err = deflate(strm, Z_BLOCK);
        if (err == Z_STREAM_ERROR)
            return err;
-        if (strm->avail_out == 0)
+        if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead)
            return Z_BUF_ERROR;
    }
    if (s->level != level) {
@@ -811,6 +852,8 @@ int ZEXPORT deflate (strm, flush)
    }

    /* Write the header */
+    if (s->status == INIT_STATE && s->wrap == 0)
+        s->status = BUSY_STATE;
    if (s->status == INIT_STATE) {
        /* zlib header */
        uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
@@ -1108,7 +1151,6 @@ int ZEXPORT deflateCopy (dest, source)
 #else
    deflate_state *ds;
    deflate_state *ss;
-    ushf *overlay;


    if (deflateStateCheck(source) || dest == Z_NULL) {
@@ -1128,8 +1170,7 @@ int ZEXPORT deflateCopy (dest, source)
    ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
    ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
    ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
-    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
-    ds->pending_buf = (uchf *) overlay;
+    ds->pending_buf = (uchf *) ZALLOC(dest, ds->lit_bufsize, 4);

    if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
        ds->pending_buf == Z_NULL) {
@@ -1143,8 +1184,7 @@ int ZEXPORT deflateCopy (dest, source)
    zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);

    ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
-    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
-    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
+    ds->sym_buf = ds->pending_buf + ds->lit_bufsize;

    ds->l_desc.dyn_tree = ds->dyn_ltree;
    ds->d_desc.dyn_tree = ds->dyn_dtree;
@@ -1513,6 +1553,8 @@ local void fill_window(s)
            s->match_start -= wsize;
            s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
            s->block_start -= (long) wsize;
+            if (s->insert > s->strstart)
+                s->insert = s->strstart;
            slide_hash(s);
            more += wsize;
        }
@@ -1742,6 +1784,7 @@ local block_state deflate_stored(s, flush)
            s->matches = 2;         /* clear hash */
            zmemcpy(s->window, s->strm->next_in - s->w_size, s->w_size);
            s->strstart = s->w_size;
+            s->insert = s->strstart;
        }
        else {
            if (s->window_size - s->strstart <= used) {
@@ -1750,12 +1793,14 @@ local block_state deflate_stored(s, flush)
                zmemcpy(s->window, s->window + s->w_size, s->strstart);
                if (s->matches < 2)
                    s->matches++;   /* add a pending slide_hash() */
+                if (s->insert > s->strstart)
+                    s->insert = s->strstart;
            }
            zmemcpy(s->window + s->strstart, s->strm->next_in - used, used);
            s->strstart += used;
+            s->insert += MIN(used, s->w_size - s->insert);
        }
        s->block_start = s->strstart;
-        s->insert += MIN(used, s->w_size - s->insert);
    }
    if (s->high_water < s->strstart)
        s->high_water = s->strstart;
@@ -1770,7 +1815,7 @@ local block_state deflate_stored(s, flush)
        return block_done;

    /* Fill the window with any remaining input. */
-    have = s->window_size - s->strstart - 1;
+    have = s->window_size - s->strstart;
    if (s->strm->avail_in > have && s->block_start >= (long)s->w_size) {
        /* Slide the window down. */
        s->block_start -= s->w_size;
@@ -1779,12 +1824,15 @@ local block_state deflate_stored(s, flush)
        if (s->matches < 2)
            s->matches++;           /* add a pending slide_hash() */
        have += s->w_size;          /* more space now */
+        if (s->insert > s->strstart)
+            s->insert = s->strstart;
    }
    if (have > s->strm->avail_in)
        have = s->strm->avail_in;
    if (have) {
        read_buf(s->strm, s->window + s->strstart, have);
        s->strstart += have;
+        s->insert += MIN(have, s->w_size - s->insert);
    }
    if (s->high_water < s->strstart)
        s->high_water = s->strstart;
@@ -1912,7 +1960,7 @@ local block_state deflate_fast(s, flush)
        FLUSH_BLOCK(s, 1);
        return finish_done;
    }
-    if (s->last_lit)
+    if (s->sym_next)
        FLUSH_BLOCK(s, 0);
    return block_done;
 }
@@ -2043,7 +2091,7 @@ local block_state deflate_slow(s, flush)
        FLUSH_BLOCK(s, 1);
        return finish_done;
    }
-    if (s->last_lit)
+    if (s->sym_next)
        FLUSH_BLOCK(s, 0);
    return block_done;
 }
@@ -2118,7 +2166,7 @@ local block_state deflate_rle(s, flush)
        FLUSH_BLOCK(s, 1);
        return finish_done;
    }
-    if (s->last_lit)
+    if (s->sym_next)
        FLUSH_BLOCK(s, 0);
    return block_done;
 }
@@ -2157,7 +2205,7 @@ local block_state deflate_huff(s, flush)
        FLUSH_BLOCK(s, 1);
        return finish_done;
    }
-    if (s->last_lit)
+    if (s->sym_next)
        FLUSH_BLOCK(s, 0);
    return block_done;
 }
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2016 Jean-loup Gailly
+ * Copyright (C) 1995-2018 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -217,7 +217,7 @@ typedef struct internal_state {
    /* Depth of each subtree used as tie breaker for trees of equal frequency
     */

-    uchf *l_buf;          /* buffer for literals or lengths */
+    uchf *sym_buf;        /* buffer for distances and literals/lengths */

    uInt  lit_bufsize;
    /* Size of match buffer for literals/lengths.  There are 4 reasons for
@@ -239,13 +239,8 @@ typedef struct internal_state {
     *   - I can't count above 4
     */

-    uInt last_lit;      /* running index in l_buf */
-
-    ushf *d_buf;
-    /* Buffer for distances. To simplify the code, d_buf and l_buf have
-     * the same number of elements. To use different lengths, an extra flag
-     * array would be necessary.
-     */
+    uInt sym_next;      /* running index in sym_buf */
+    uInt sym_end;       /* symbol table full when sym_next reaches this */

    ulg opt_len;        /* bit length of current block with optimal trees */
    ulg static_len;     /* bit length of current block with static trees */
@@ -325,20 +320,22 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,

 # define _tr_tally_lit(s, c, flush) \
  { uch cc = (c); \
-    s->d_buf[s->last_lit] = 0; \
-    s->l_buf[s->last_lit++] = cc; \
+    s->sym_buf[s->sym_next++] = 0; \
+    s->sym_buf[s->sym_next++] = 0; \
+    s->sym_buf[s->sym_next++] = cc; \
    s->dyn_ltree[cc].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
+    flush = (s->sym_next == s->sym_end); \
   }
 # define _tr_tally_dist(s, distance, length, flush) \
  { uch len = (uch)(length); \
    ush dist = (ush)(distance); \
-    s->d_buf[s->last_lit] = dist; \
-    s->l_buf[s->last_lit++] = len; \
+    s->sym_buf[s->sym_next++] = dist; \
+    s->sym_buf[s->sym_next++] = dist >> 8; \
+    s->sym_buf[s->sym_next++] = len; \
    dist--; \
    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
    s->dyn_dtree[d_code(dist)].Freq++; \
-    flush = (s->last_lit == s->lit_bufsize-1); \
+    flush = (s->sym_next == s->sym_end); \
  }
 #else
 # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
@@ -34,6 +34,10 @@ gzlog.h
      and deflateSetDictionary()
    - illustrates use of a gzip header extra field

+gznorm.c
+    normalize a gzip file by combining members into a single member
+    - demonstrates how to concatenate deflate streams using Z_BLOCK
+
 zlib_how.html
    painfully comprehensive description of zpipe.c (see below)
    - describes in excruciating detail the use of deflate() and inflate()
@@ -44,6 +48,7 @@ zpipe.c
    - deeply commented in zlib_how.html (see above)

 zran.c
+zran.h
    index a zlib or gzip stream and randomly access it
    - illustrates the use of Z_BLOCK, inflatePrime(), and
      inflateSetDictionary() to provide random access
@@ -1,7 +1,7 @@
 /* enough.c -- determine the maximum size of inflate's Huffman code tables over
- * all possible valid and complete Huffman codes, subject to a length limit.
- * Copyright (C) 2007, 2008, 2012 Mark Adler
- * Version 1.4  18 August 2012  Mark Adler
+ * all possible valid and complete prefix codes, subject to a length limit.
+ * Copyright (C) 2007, 2008, 2012, 2018 Mark Adler
+ * Version 1.5  5 August 2018  Mark Adler
 */

 /* Version history:
@@ -17,101 +17,107 @@
   1.4  18 Aug 2012  Avoid shifts more than bits in type (caused endless loop!)
                     Clean up comparisons of different types
                     Clean up code indentation
+   1.5   5 Aug 2018  Clean up code style, formatting, and comments
+                     Show all the codes for the maximum, and only the maximum
 */

 /*
-   Examine all possible Huffman codes for a given number of symbols and a
-   maximum code length in bits to determine the maximum table size for zilb's
-   inflate.  Only complete Huffman codes are counted.
+   Examine all possible prefix codes for a given number of symbols and a
+   maximum code length in bits to determine the maximum table size for zlib's
+   inflate. Only complete prefix codes are counted.

   Two codes are considered distinct if the vectors of the number of codes per
-   length are not identical.  So permutations of the symbol assignments result
+   length are not identical. So permutations of the symbol assignments result
   in the same code for the counting, as do permutations of the assignments of
   the bit values to the codes (i.e. only canonical codes are counted).

   We build a code from shorter to longer lengths, determining how many symbols
-   are coded at each length.  At each step, we have how many symbols remain to
+   are coded at each length. At each step, we have how many symbols remain to
   be coded, what the last code length used was, and how many bit patterns of
   that length remain unused. Then we add one to the code length and double the
-   number of unused patterns to graduate to the next code length.  We then
+   number of unused patterns to graduate to the next code length. We then
   assign all portions of the remaining symbols to that code length that
-   preserve the properties of a correct and eventually complete code.  Those
+   preserve the properties of a correct and eventually complete code. Those
   properties are: we cannot use more bit patterns than are available; and when
-   all the symbols are used, there are exactly zero possible bit patterns
-   remaining.
+   all the symbols are used, there are exactly zero possible bit patterns left
+   unused.

   The inflate Huffman decoding algorithm uses two-level lookup tables for
-   speed.  There is a single first-level table to decode codes up to root bits
-   in length (root == 9 in the current inflate implementation).  The table
-   has 1 << root entries and is indexed by the next root bits of input.  Codes
-   shorter than root bits have replicated table entries, so that the correct
-   entry is pointed to regardless of the bits that follow the short code.  If
-   the code is longer than root bits, then the table entry points to a second-
-   level table.  The size of that table is determined by the longest code with
-   that root-bit prefix.  If that longest code has length len, then the table
-   has size 1 << (len - root), to index the remaining bits in that set of
-   codes.  Each subsequent root-bit prefix then has its own sub-table.  The
-   total number of table entries required by the code is calculated
-   incrementally as the number of codes at each bit length is populated.  When
-   all of the codes are shorter than root bits, then root is reduced to the
-   longest code length, resulting in a single, smaller, one-level table.
+   speed. There is a single first-level table to decode codes up to root bits
+   in length (root == 9 for literal/length codes and root == 6 for distance
+   codes, in the current inflate implementation). The base table has 1 << root
+   entries and is indexed by the next root bits of input. Codes shorter than
+   root bits have replicated table entries, so that the correct entry is
+   pointed to regardless of the bits that follow the short code. If the code is
+   longer than root bits, then the table entry points to a second-level table.
+   The size of that table is determined by the longest code with that root-bit
+   prefix. If that longest code has length len, then the table has size 1 <<
+   (len - root), to index the remaining bits in that set of codes. Each
+   subsequent root-bit prefix then has its own sub-table. The total number of
+   table entries required by the code is calculated incrementally as the number
+   of codes at each bit length is populated. When all of the codes are shorter
+   than root bits, then root is reduced to the longest code length, resulting
+   in a single, smaller, one-level table.

   The inflate algorithm also provides for small values of root (relative to
   the log2 of the number of symbols), where the shortest code has more bits
-   than root.  In that case, root is increased to the length of the shortest
-   code.  This program, by design, does not handle that case, so it is verified
-   that the number of symbols is less than 2^(root + 1).
+   than root. In that case, root is increased to the length of the shortest
+   code. This program, by design, does not handle that case, so it is verified
+   that the number of symbols is less than 1 << (root + 1).

   In order to speed up the examination (by about ten orders of magnitude for
   the default arguments), the intermediate states in the build-up of a code
-   are remembered and previously visited branches are pruned.  The memory
+   are remembered and previously visited branches are pruned. The memory
   required for this will increase rapidly with the total number of symbols and
-   the maximum code length in bits.  However this is a very small price to pay
+   the maximum code length in bits. However this is a very small price to pay
   for the vast speedup.

-   First, all of the possible Huffman codes are counted, and reachable
+   First, all of the possible prefix codes are counted, and reachable
   intermediate states are noted by a non-zero count in a saved-results array.
   Second, the intermediate states that lead to (root + 1) bit or longer codes
   are used to look at all sub-codes from those junctures for their inflate
-   memory usage.  (The amount of memory used is not affected by the number of
+   memory usage. (The amount of memory used is not affected by the number of
   codes of root bits or less in length.)  Third, the visited states in the
   construction of those sub-codes and the associated calculation of the table
   size is recalled in order to avoid recalculating from the same juncture.
   Beginning the code examination at (root + 1) bit codes, which is enabled by
   identifying the reachable nodes, accounts for about six of the orders of
-   magnitude of improvement for the default arguments.  About another four
-   orders of magnitude come from not revisiting previous states.  Out of
-   approximately 2x10^16 possible Huffman codes, only about 2x10^6 sub-codes
+   magnitude of improvement for the default arguments. About another four
+   orders of magnitude come from not revisiting previous states. Out of
+   approximately 2x10^16 possible prefix codes, only about 2x10^6 sub-codes
   need to be examined to cover all of the possible table memory usage cases
   for the default arguments of 286 symbols limited to 15-bit codes.

-   Note that an unsigned long long type is used for counting.  It is quite easy
-   to exceed the capacity of an eight-byte integer with a large number of
-   symbols and a large maximum code length, so multiple-precision arithmetic
-   would need to replace the unsigned long long arithmetic in that case.  This
-   program will abort if an overflow occurs.  The big_t type identifies where
-   the counting takes place.
+   Note that the uintmax_t type is used for counting. It is quite easy to
+   exceed the capacity of an eight-byte integer with a large number of symbols
+   and a large maximum code length, so multiple-precision arithmetic would need
+   to replace the integer arithmetic in that case. This program will abort if
+   an overflow occurs. The big_t type identifies where the counting takes
+   place.

-   An unsigned long long type is also used for calculating the number of
-   possible codes remaining at the maximum length.  This limits the maximum
-   code length to the number of bits in a long long minus the number of bits
-   needed to represent the symbols in a flat code.  The code_t type identifies
-   where the bit pattern counting takes place.
+   The uintmax_t type is also used for calculating the number of possible codes
+   remaining at the maximum length. This limits the maximum code length to the
+   number of bits in a long long minus the number of bits needed to represent
+   the symbols in a flat code. The code_t type identifies where the bit-pattern
+   counting takes place.
 */

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
+#include <stdint.h>
 #include <assert.h>

 #define local static

-/* special data types */
-typedef unsigned long long big_t;   /* type for code counting */
-typedef unsigned long long code_t;  /* type for bit pattern counting */
-struct tab {                        /* type for been here check */
-    size_t len;         /* length of bit vector in char's */
-    char *vec;          /* allocated bit vector */
+// Special data types.
+typedef uintmax_t big_t;    // type for code counting
+#define PRIbig "ju"         // printf format for big_t
+typedef uintmax_t code_t;   // type for bit pattern counting
+struct tab {                // type for been-here check
+    size_t len;             // allocated length of bit vector in octets
+    char *vec;              // allocated bit vector
 };

 /* The array for saving results, num[], is indexed with this triplet:
@@ -126,447 +132,466 @@ struct tab {                        /* type for been here check */
      left: 2..syms - 1, but only the evens (so syms == 8 -> 2, 4, 6)
      len: 1..max - 1 (max == maximum code length in bits)

-   syms == 2 is not saved since that immediately leads to a single code.  left
+   syms == 2 is not saved since that immediately leads to a single code. left
   must be even, since it represents the number of available bit patterns at
-   the current length, which is double the number at the previous length.
-   left ends at syms-1 since left == syms immediately results in a single code.
+   the current length, which is double the number at the previous length. left
+   ends at syms-1 since left == syms immediately results in a single code.
   (left > sym is not allowed since that would result in an incomplete code.)
   len is less than max, since the code completes immediately when len == max.

-   The offset into the array is calculated for the three indices with the
-   first one (syms) being outermost, and the last one (len) being innermost.
-   We build the array with length max-1 lists for the len index, with syms-3
-   of those for each symbol.  There are totsym-2 of those, with each one
-   varying in length as a function of sym.  See the calculation of index in
-   count() for the index, and the calculation of size in main() for the size
-   of the array.
+   The offset into the array is calculated for the three indices with the first
+   one (syms) being outermost, and the last one (len) being innermost. We build
+   the array with length max-1 lists for the len index, with syms-3 of those
+   for each symbol. There are totsym-2 of those, with each one varying in
+   length as a function of sym. See the calculation of index in map() for the
+   index, and the calculation of size in main() for the size of the array.

   For the deflate example of 286 symbols limited to 15-bit codes, the array
-   has 284,284 entries, taking up 2.17 MB for an 8-byte big_t.  More than
-   half of the space allocated for saved results is actually used -- not all
-   possible triplets are reached in the generation of valid Huffman codes.
+   has 284,284 entries, taking up 2.17 MB for an 8-byte big_t. More than half
+   of the space allocated for saved results is actually used -- not all
+   possible triplets are reached in the generation of valid prefix codes.
 */

 /* The array for tracking visited states, done[], is itself indexed identically
   to the num[] array as described above for the (syms, left, len) triplet.
   Each element in the array is further indexed by the (mem, rem) doublet,
   where mem is the amount of inflate table space used so far, and rem is the
-   remaining unused entries in the current inflate sub-table.  Each indexed
+   remaining unused entries in the current inflate sub-table. Each indexed
   element is simply one bit indicating whether the state has been visited or
-   not.  Since the ranges for mem and rem are not known a priori, each bit
+   not. Since the ranges for mem and rem are not known a priori, each bit
   vector is of a variable size, and grows as needed to accommodate the visited
-   states.  mem and rem are used to calculate a single index in a triangular
-   array.  Since the range of mem is expected in the default case to be about
+   states. mem and rem are used to calculate a single index in a triangular
+   array. Since the range of mem is expected in the default case to be about
   ten times larger than the range of rem, the array is skewed to reduce the
-   memory usage, with eight times the range for mem than for rem.  See the
-   calculations for offset and bit in beenhere() for the details.
+   memory usage, with eight times the range for mem than for rem. See the
+   calculations for offset and bit in been_here() for the details.

   For the deflate example of 286 symbols limited to 15-bit codes, the bit
-   vectors grow to total approximately 21 MB, in addition to the 4.3 MB done[]
-   array itself.
+   vectors grow to total 5.5 MB, in addition to the 4.3 MB done array itself.
 */

-/* Globals to avoid propagating constants or constant pointers recursively */
-local int max;          /* maximum allowed bit length for the codes */
-local int root;         /* size of base code table in bits */
-local int large;        /* largest code table so far */
-local size_t size;      /* number of elements in num and done */
-local int *code;        /* number of symbols assigned to each bit length */
-local big_t *num;       /* saved results array for code counting */
-local struct tab *done; /* states already evaluated array */
+// Type for a variable-length, allocated string.
+typedef struct {
+    char *str;          // pointer to allocated string
+    size_t size;        // size of allocation
+    size_t len;         // length of string, not including terminating zero
+} string_t;

-/* Index function for num[] and done[] */
-#define INDEX(i,j,k) (((size_t)((i-1)>>1)*((i-2)>>1)+(j>>1)-1)*(max-1)+k-1)
-
-/* Free allocated space.  Uses globals code, num, and done. */
-local void cleanup(void)
-{
-    size_t n;
-
-    if (done != NULL) {
-        for (n = 0; n < size; n++)
-            if (done[n].len)
-                free(done[n].vec);
-        free(done);
-    }
-    if (num != NULL)
-        free(num);
-    if (code != NULL)
-        free(code);
+// Clear a string_t.
+local void string_clear(string_t *s) {
+    s->str[0] = 0;
+    s->len = 0;
 }

-/* Return the number of possible Huffman codes using bit patterns of lengths
-   len through max inclusive, coding syms symbols, with left bit patterns of
-   length len unused -- return -1 if there is an overflow in the counting.
-   Keep a record of previous results in num to prevent repeating the same
-   calculation.  Uses the globals max and num. */
-local big_t count(int syms, int len, int left)
-{
-    big_t sum;          /* number of possible codes from this juncture */
-    big_t got;          /* value returned from count() */
-    int least;          /* least number of syms to use at this juncture */
-    int most;           /* most number of syms to use at this juncture */
-    int use;            /* number of bit patterns to use in next call */
-    size_t index;       /* index of this case in *num */
+// Initialize a string_t.
+local void string_init(string_t *s) {
+    s->size = 16;
+    s->str = malloc(s->size);
+    assert(s->str != NULL && "out of memory");
+    string_clear(s);
+}

-    /* see if only one possible code */
+// Release the allocation of a string_t.
+local void string_free(string_t *s) {
+    free(s->str);
+    s->str = NULL;
+    s->size = 0;
+    s->len = 0;
+}
+
+// Save the results of printf with fmt and the subsequent argument list to s.
+// Each call appends to s. The allocated space for s is increased as needed.
+local void string_printf(string_t *s, char *fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    size_t len = s->len;
+    int ret = vsnprintf(s->str + len, s->size - len, fmt, ap);
+    assert(ret >= 0 && "out of memory");
+    s->len += ret;
+    if (s->size < s->len + 1) {
+        do {
+            s->size <<= 1;
+            assert(s->size != 0 && "overflow");
+        } while (s->size < s->len + 1);
+        s->str = realloc(s->str, s->size);
+        assert(s->str != NULL && "out of memory");
+        vsnprintf(s->str + len, s->size - len, fmt, ap);
+    }
+    va_end(ap);
+}
+
+// Globals to avoid propagating constants or constant pointers recursively.
+struct {
+    int max;            // maximum allowed bit length for the codes
+    int root;           // size of base code table in bits
+    int large;          // largest code table so far
+    size_t size;        // number of elements in num and done
+    big_t tot;          // total number of codes with maximum tables size
+    string_t out;       // display of subcodes for maximum tables size
+    int *code;          // number of symbols assigned to each bit length
+    big_t *num;         // saved results array for code counting
+    struct tab *done;   // states already evaluated array
+} g;
+
+// Index function for num[] and done[].
+local inline size_t map(int syms, int left, int len) {
+    return ((size_t)((syms - 1) >> 1) * ((syms - 2) >> 1) +
+            (left >> 1) - 1) * (g.max - 1) +
+           len - 1;
+}
+
+// Free allocated space in globals.
+local void cleanup(void) {
+    if (g.done != NULL) {
+        for (size_t n = 0; n < g.size; n++)
+            if (g.done[n].len)
+                free(g.done[n].vec);
+        g.size = 0;
+        free(g.done);   g.done = NULL;
+    }
+    free(g.num);    g.num = NULL;
+    free(g.code);   g.code = NULL;
+    string_free(&g.out);
+}
+
+// Return the number of possible prefix codes using bit patterns of lengths len
+// through max inclusive, coding syms symbols, with left bit patterns of length
+// len unused -- return -1 if there is an overflow in the counting. Keep a
+// record of previous results in num to prevent repeating the same calculation.
+local big_t count(int syms, int left, int len) {
+    // see if only one possible code
    if (syms == left)
        return 1;

-    /* note and verify the expected state */
-    assert(syms > left && left > 0 && len < max);
+    // note and verify the expected state
+    assert(syms > left && left > 0 && len < g.max);

-    /* see if we've done this one already */
-    index = INDEX(syms, left, len);
-    got = num[index];
+    // see if we've done this one already
+    size_t index = map(syms, left, len);
+    big_t got = g.num[index];
    if (got)
-        return got;         /* we have -- return the saved result */
+        return got;         // we have -- return the saved result

-    /* we need to use at least this many bit patterns so that the code won't be
-       incomplete at the next length (more bit patterns than symbols) */
-    least = (left << 1) - syms;
+    // we need to use at least this many bit patterns so that the code won't be
+    // incomplete at the next length (more bit patterns than symbols)
+    int least = (left << 1) - syms;
    if (least < 0)
        least = 0;

-    /* we can use at most this many bit patterns, lest there not be enough
-       available for the remaining symbols at the maximum length (if there were
-       no limit to the code length, this would become: most = left - 1) */
-    most = (((code_t)left << (max - len)) - syms) /
-            (((code_t)1 << (max - len)) - 1);
+    // we can use at most this many bit patterns, lest there not be enough
+    // available for the remaining symbols at the maximum length (if there were
+    // no limit to the code length, this would become: most = left - 1)
+    int most = (((code_t)left << (g.max - len)) - syms) /
+               (((code_t)1 << (g.max - len)) - 1);

-    /* count all possible codes from this juncture and add them up */
-    sum = 0;
-    for (use = least; use <= most; use++) {
-        got = count(syms - use, len + 1, (left - use) << 1);
+    // count all possible codes from this juncture and add them up
+    big_t sum = 0;
+    for (int use = least; use <= most; use++) {
+        got = count(syms - use, (left - use) << 1, len + 1);
        sum += got;
-        if (got == (big_t)0 - 1 || sum < got)   /* overflow */
-            return (big_t)0 - 1;
+        if (got == (big_t)-1 || sum < got)      // overflow
+            return (big_t)-1;
    }

-    /* verify that all recursive calls are productive */
+    // verify that all recursive calls are productive
    assert(sum != 0);

-    /* save the result and return it */
-    num[index] = sum;
+    // save the result and return it
+    g.num[index] = sum;
    return sum;
 }

-/* Return true if we've been here before, set to true if not.  Set a bit in a
-   bit vector to indicate visiting this state.  Each (syms,len,left) state
-   has a variable size bit vector indexed by (mem,rem).  The bit vector is
-   lengthened if needed to allow setting the (mem,rem) bit. */
-local int beenhere(int syms, int len, int left, int mem, int rem)
-{
-    size_t index;       /* index for this state's bit vector */
-    size_t offset;      /* offset in this state's bit vector */
-    int bit;            /* mask for this state's bit */
-    size_t length;      /* length of the bit vector in bytes */
-    char *vector;       /* new or enlarged bit vector */
-
-    /* point to vector for (syms,left,len), bit in vector for (mem,rem) */
-    index = INDEX(syms, left, len);
-    mem -= 1 << root;
-    offset = (mem >> 3) + rem;
+// Return true if we've been here before, set to true if not. Set a bit in a
+// bit vector to indicate visiting this state. Each (syms,len,left) state has a
+// variable size bit vector indexed by (mem,rem). The bit vector is lengthened
+// as needed to allow setting the (mem,rem) bit.
+local int been_here(int syms, int left, int len, int mem, int rem) {
+    // point to vector for (syms,left,len), bit in vector for (mem,rem)
+    size_t index = map(syms, left, len);
+    mem -= 1 << g.root;             // mem always includes the root table
+    mem >>= 1;                      // mem and rem are always even
+    rem >>= 1;
+    size_t offset = (mem >> 3) + rem;
    offset = ((offset * (offset + 1)) >> 1) + rem;
-    bit = 1 << (mem & 7);
+    int bit = 1 << (mem & 7);

-    /* see if we've been here */
-    length = done[index].len;
-    if (offset < length && (done[index].vec[offset] & bit) != 0)
-        return 1;       /* done this! */
+    // see if we've been here
+    size_t length = g.done[index].len;
+    if (offset < length && (g.done[index].vec[offset] & bit) != 0)
+        return 1;       // done this!

-    /* we haven't been here before -- set the bit to show we have now */
+    // we haven't been here before -- set the bit to show we have now

-    /* see if we need to lengthen the vector in order to set the bit */
+    // see if we need to lengthen the vector in order to set the bit
    if (length <= offset) {
-        /* if we have one already, enlarge it, zero out the appended space */
+        // if we have one already, enlarge it, zero out the appended space
+        char *vector;
        if (length) {
            do {
                length <<= 1;
            } while (length <= offset);
-            vector = realloc(done[index].vec, length);
-            if (vector != NULL)
-                memset(vector + done[index].len, 0, length - done[index].len);
+            vector = realloc(g.done[index].vec, length);
+            assert(vector != NULL && "out of memory");
+            memset(vector + g.done[index].len, 0, length - g.done[index].len);
        }

-        /* otherwise we need to make a new vector and zero it out */
+        // otherwise we need to make a new vector and zero it out
        else {
-            length = 1 << (len - root);
+            length = 16;
            while (length <= offset)
                length <<= 1;
-            vector = calloc(length, sizeof(char));
+            vector = calloc(length, 1);
+            assert(vector != NULL && "out of memory");
        }

-        /* in either case, bail if we can't get the memory */
-        if (vector == NULL) {
-            fputs("abort: unable to allocate enough memory\n", stderr);
-            cleanup();
-            exit(1);
-        }
-
-        /* install the new vector */
-        done[index].len = length;
-        done[index].vec = vector;
+        // install the new vector
+        g.done[index].len = length;
+        g.done[index].vec = vector;
    }

-    /* set the bit */
-    done[index].vec[offset] |= bit;
+    // set the bit
+    g.done[index].vec[offset] |= bit;
    return 0;
 }

-/* Examine all possible codes from the given node (syms, len, left).  Compute
-   the amount of memory required to build inflate's decoding tables, where the
-   number of code structures used so far is mem, and the number remaining in
-   the current sub-table is rem.  Uses the globals max, code, root, large, and
-   done. */
-local void examine(int syms, int len, int left, int mem, int rem)
-{
-    int least;          /* least number of syms to use at this juncture */
-    int most;           /* most number of syms to use at this juncture */
-    int use;            /* number of bit patterns to use in next call */
-
-    /* see if we have a complete code */
+// Examine all possible codes from the given node (syms, len, left). Compute
+// the amount of memory required to build inflate's decoding tables, where the
+// number of code structures used so far is mem, and the number remaining in
+// the current sub-table is rem.
+local void examine(int syms, int left, int len, int mem, int rem) {
+    // see if we have a complete code
    if (syms == left) {
-        /* set the last code entry */
-        code[len] = left;
+        // set the last code entry
+        g.code[len] = left;

-        /* complete computation of memory used by this code */
+        // complete computation of memory used by this code
        while (rem < left) {
            left -= rem;
-            rem = 1 << (len - root);
+            rem = 1 << (len - g.root);
            mem += rem;
        }
        assert(rem == left);

-        /* if this is a new maximum, show the entries used and the sub-code */
-        if (mem > large) {
-            large = mem;
-            printf("max %d: ", mem);
-            for (use = root + 1; use <= max; use++)
-                if (code[use])
-                    printf("%d[%d] ", code[use], use);
-            putchar('\n');
-            fflush(stdout);
+        // if this is at the maximum, show the sub-code
+        if (mem >= g.large) {
+            // if this is a new maximum, update the maximum and clear out the
+            // printed sub-codes from the previous maximum
+            if (mem > g.large) {
+                g.large = mem;
+                string_clear(&g.out);
+            }
+
+            // compute the starting state for this sub-code
+            syms = 0;
+            left = 1 << g.max;
+            for (int bits = g.max; bits > g.root; bits--) {
+                syms += g.code[bits];
+                left -= g.code[bits];
+                assert((left & 1) == 0);
+                left >>= 1;
+            }
+
+            // print the starting state and the resulting sub-code to g.out
+            string_printf(&g.out, "<%u, %u, %u>:",
+                          syms, g.root + 1, ((1 << g.root) - left) << 1);
+            for (int bits = g.root + 1; bits <= g.max; bits++)
+                if (g.code[bits])
+                    string_printf(&g.out, " %d[%d]", g.code[bits], bits);
+            string_printf(&g.out, "\n");
        }

-        /* remove entries as we drop back down in the recursion */
-        code[len] = 0;
+        // remove entries as we drop back down in the recursion
+        g.code[len] = 0;
        return;
    }

-    /* prune the tree if we can */
-    if (beenhere(syms, len, left, mem, rem))
+    // prune the tree if we can
+    if (been_here(syms, left, len, mem, rem))
        return;

-    /* we need to use at least this many bit patterns so that the code won't be
-       incomplete at the next length (more bit patterns than symbols) */
-    least = (left << 1) - syms;
+    // we need to use at least this many bit patterns so that the code won't be
+    // incomplete at the next length (more bit patterns than symbols)
+    int least = (left << 1) - syms;
    if (least < 0)
        least = 0;

-    /* we can use at most this many bit patterns, lest there not be enough
-       available for the remaining symbols at the maximum length (if there were
-       no limit to the code length, this would become: most = left - 1) */
-    most = (((code_t)left << (max - len)) - syms) /
-            (((code_t)1 << (max - len)) - 1);
+    // we can use at most this many bit patterns, lest there not be enough
+    // available for the remaining symbols at the maximum length (if there were
+    // no limit to the code length, this would become: most = left - 1)
+    int most = (((code_t)left << (g.max - len)) - syms) /
+               (((code_t)1 << (g.max - len)) - 1);

-    /* occupy least table spaces, creating new sub-tables as needed */
-    use = least;
+    // occupy least table spaces, creating new sub-tables as needed
+    int use = least;
    while (rem < use) {
        use -= rem;
-        rem = 1 << (len - root);
+        rem = 1 << (len - g.root);
        mem += rem;
    }
    rem -= use;

-    /* examine codes from here, updating table space as we go */
+    // examine codes from here, updating table space as we go
    for (use = least; use <= most; use++) {
-        code[len] = use;
-        examine(syms - use, len + 1, (left - use) << 1,
-                mem + (rem ? 1 << (len - root) : 0), rem << 1);
+        g.code[len] = use;
+        examine(syms - use, (left - use) << 1, len + 1,
+                mem + (rem ? 1 << (len - g.root) : 0), rem << 1);
        if (rem == 0) {
-            rem = 1 << (len - root);
+            rem = 1 << (len - g.root);
            mem += rem;
        }
        rem--;
    }

-    /* remove entries as we drop back down in the recursion */
-    code[len] = 0;
+    // remove entries as we drop back down in the recursion
+    g.code[len] = 0;
 }

-/* Look at all sub-codes starting with root + 1 bits.  Look at only the valid
-   intermediate code states (syms, left, len).  For each completed code,
-   calculate the amount of memory required by inflate to build the decoding
-   tables. Find the maximum amount of memory required and show the code that
-   requires that maximum.  Uses the globals max, root, and num. */
-local void enough(int syms)
-{
-    int n;              /* number of remaing symbols for this node */
-    int left;           /* number of unused bit patterns at this length */
-    size_t index;       /* index of this case in *num */
+// Look at all sub-codes starting with root + 1 bits. Look at only the valid
+// intermediate code states (syms, left, len). For each completed code,
+// calculate the amount of memory required by inflate to build the decoding
+// tables. Find the maximum amount of memory required and show the codes that
+// require that maximum.
+local void enough(int syms) {
+    // clear code
+    for (int n = 0; n <= g.max; n++)
+        g.code[n] = 0;

-    /* clear code */
-    for (n = 0; n <= max; n++)
-        code[n] = 0;
+    // look at all (root + 1) bit and longer codes
+    string_clear(&g.out);           // empty saved results
+    g.large = 1 << g.root;          // base table
+    if (g.root < g.max)             // otherwise, there's only a base table
+        for (int n = 3; n <= syms; n++)
+            for (int left = 2; left < n; left += 2) {
+                // look at all reachable (root + 1) bit nodes, and the
+                // resulting codes (complete at root + 2 or more)
+                size_t index = map(n, left, g.root + 1);
+                if (g.root + 1 < g.max && g.num[index]) // reachable node
+                    examine(n, left, g.root + 1, 1 << g.root, 0);

-    /* look at all (root + 1) bit and longer codes */
-    large = 1 << root;              /* base table */
-    if (root < max)                 /* otherwise, there's only a base table */
-        for (n = 3; n <= syms; n++)
-            for (left = 2; left < n; left += 2)
-            {
-                /* look at all reachable (root + 1) bit nodes, and the
-                   resulting codes (complete at root + 2 or more) */
-                index = INDEX(n, left, root + 1);
-                if (root + 1 < max && num[index])       /* reachable node */
-                    examine(n, root + 1, left, 1 << root, 0);
-
-                /* also look at root bit codes with completions at root + 1
-                   bits (not saved in num, since complete), just in case */
-                if (num[index - 1] && n <= left << 1)
-                    examine((n - left) << 1, root + 1, (n - left) << 1,
-                            1 << root, 0);
+                // also look at root bit codes with completions at root + 1
+                // bits (not saved in num, since complete), just in case
+                if (g.num[index - 1] && n <= left << 1)
+                    examine((n - left) << 1, (n - left) << 1, g.root + 1,
+                            1 << g.root, 0);
            }

-    /* done */
-    printf("done: maximum of %d table entries\n", large);
+    // done
+    printf("maximum of %d table entries for root = %d\n", g.large, g.root);
+    fputs(g.out.str, stdout);
 }

-/*
-   Examine and show the total number of possible Huffman codes for a given
-   maximum number of symbols, initial root table size, and maximum code length
-   in bits -- those are the command arguments in that order.  The default
-   values are 286, 9, and 15 respectively, for the deflate literal/length code.
-   The possible codes are counted for each number of coded symbols from two to
-   the maximum.  The counts for each of those and the total number of codes are
-   shown.  The maximum number of inflate table entires is then calculated
-   across all possible codes.  Each new maximum number of table entries and the
-   associated sub-code (starting at root + 1 == 10 bits) is shown.
+// Examine and show the total number of possible prefix codes for a given
+// maximum number of symbols, initial root table size, and maximum code length
+// in bits -- those are the command arguments in that order. The default values
+// are 286, 9, and 15 respectively, for the deflate literal/length code. The
+// possible codes are counted for each number of coded symbols from two to the
+// maximum. The counts for each of those and the total number of codes are
+// shown. The maximum number of inflate table entires is then calculated across
+// all possible codes. Each new maximum number of table entries and the
+// associated sub-code (starting at root + 1 == 10 bits) is shown.
+//
+// To count and examine prefix codes that are not length-limited, provide a
+// maximum length equal to the number of symbols minus one.
+//
+// For the deflate literal/length code, use "enough". For the deflate distance
+// code, use "enough 30 6".
+int main(int argc, char **argv) {
+    // set up globals for cleanup()
+    g.code = NULL;
+    g.num = NULL;
+    g.done = NULL;
+    string_init(&g.out);

-   To count and examine Huffman codes that are not length-limited, provide a
-   maximum length equal to the number of symbols minus one.
-
-   For the deflate literal/length code, use "enough".  For the deflate distance
-   code, use "enough 30 6".
-
-   This uses the %llu printf format to print big_t numbers, which assumes that
-   big_t is an unsigned long long.  If the big_t type is changed (for example
-   to a multiple precision type), the method of printing will also need to be
-   updated.
- */
-int main(int argc, char **argv)
-{
-    int syms;           /* total number of symbols to code */
-    int n;              /* number of symbols to code for this run */
-    big_t got;          /* return value of count() */
-    big_t sum;          /* accumulated number of codes over n */
-    code_t word;        /* for counting bits in code_t */
-
-    /* set up globals for cleanup() */
-    code = NULL;
-    num = NULL;
-    done = NULL;
-
-    /* get arguments -- default to the deflate literal/length code */
-    syms = 286;
-    root = 9;
-    max = 15;
+    // get arguments -- default to the deflate literal/length code
+    int syms = 286;
+    g.root = 9;
+    g.max = 15;
    if (argc > 1) {
        syms = atoi(argv[1]);
        if (argc > 2) {
-            root = atoi(argv[2]);
+            g.root = atoi(argv[2]);
            if (argc > 3)
-                max = atoi(argv[3]);
+                g.max = atoi(argv[3]);
        }
    }
-    if (argc > 4 || syms < 2 || root < 1 || max < 1) {
+    if (argc > 4 || syms < 2 || g.root < 1 || g.max < 1) {
        fputs("invalid arguments, need: [sym >= 2 [root >= 1 [max >= 1]]]\n",
              stderr);
        return 1;
    }

-    /* if not restricting the code length, the longest is syms - 1 */
-    if (max > syms - 1)
-        max = syms - 1;
+    // if not restricting the code length, the longest is syms - 1
+    if (g.max > syms - 1)
+        g.max = syms - 1;

-    /* determine the number of bits in a code_t */
-    for (n = 0, word = 1; word; n++, word <<= 1)
-        ;
+    // determine the number of bits in a code_t
+    int bits = 0;
+    for (code_t word = 1; word; word <<= 1)
+        bits++;

-    /* make sure that the calculation of most will not overflow */
-    if (max > n || (code_t)(syms - 2) >= (((code_t)0 - 1) >> (max - 1))) {
+    // make sure that the calculation of most will not overflow
+    if (g.max > bits || (code_t)(syms - 2) >= ((code_t)-1 >> (g.max - 1))) {
        fputs("abort: code length too long for internal types\n", stderr);
        return 1;
    }

-    /* reject impossible code requests */
-    if ((code_t)(syms - 1) > ((code_t)1 << max) - 1) {
+    // reject impossible code requests
+    if ((code_t)(syms - 1) > ((code_t)1 << g.max) - 1) {
        fprintf(stderr, "%d symbols cannot be coded in %d bits\n",
-                syms, max);
+                syms, g.max);
        return 1;
    }

-    /* allocate code vector */
-    code = calloc(max + 1, sizeof(int));
-    if (code == NULL) {
-        fputs("abort: unable to allocate enough memory\n", stderr);
-        return 1;
-    }
+    // allocate code vector
+    g.code = calloc(g.max + 1, sizeof(int));
+    assert(g.code != NULL && "out of memory");

-    /* determine size of saved results array, checking for overflows,
-       allocate and clear the array (set all to zero with calloc()) */
-    if (syms == 2)              /* iff max == 1 */
-        num = NULL;             /* won't be saving any results */
+    // determine size of saved results array, checking for overflows,
+    // allocate and clear the array (set all to zero with calloc())
+    if (syms == 2)              // iff max == 1
+        g.num = NULL;           // won't be saving any results
    else {
-        size = syms >> 1;
-        if (size > ((size_t)0 - 1) / (n = (syms - 1) >> 1) ||
-                (size *= n, size > ((size_t)0 - 1) / (n = max - 1)) ||
-                (size *= n, size > ((size_t)0 - 1) / sizeof(big_t)) ||
-                (num = calloc(size, sizeof(big_t))) == NULL) {
-            fputs("abort: unable to allocate enough memory\n", stderr);
-            cleanup();
-            return 1;
-        }
+        g.size = syms >> 1;
+        int n = (syms - 1) >> 1;
+        assert(g.size <= (size_t)-1 / n && "overflow");
+        g.size *= n;
+        n = g.max - 1;
+        assert(g.size <= (size_t)-1 / n && "overflow");
+        g.size *= n;
+        g.num = calloc(g.size, sizeof(big_t));
+        assert(g.num != NULL && "out of memory");
    }

-    /* count possible codes for all numbers of symbols, add up counts */
-    sum = 0;
-    for (n = 2; n <= syms; n++) {
-        got = count(n, 1, 2);
+    // count possible codes for all numbers of symbols, add up counts
+    big_t sum = 0;
+    for (int n = 2; n <= syms; n++) {
+        big_t got = count(n, 2, 1);
        sum += got;
-        if (got == (big_t)0 - 1 || sum < got) {     /* overflow */
-            fputs("abort: can't count that high!\n", stderr);
-            cleanup();
-            return 1;
-        }
-        printf("%llu %d-codes\n", got, n);
+        assert(got != (big_t)-1 && sum >= got && "overflow");
    }
-    printf("%llu total codes for 2 to %d symbols", sum, syms);
-    if (max < syms - 1)
-        printf(" (%d-bit length limit)\n", max);
+    printf("%"PRIbig" total codes for 2 to %d symbols", sum, syms);
+    if (g.max < syms - 1)
+        printf(" (%d-bit length limit)\n", g.max);
    else
        puts(" (no length limit)");

-    /* allocate and clear done array for beenhere() */
+    // allocate and clear done array for been_here()
    if (syms == 2)
-        done = NULL;
-    else if (size > ((size_t)0 - 1) / sizeof(struct tab) ||
-             (done = calloc(size, sizeof(struct tab))) == NULL) {
-        fputs("abort: unable to allocate enough memory\n", stderr);
-        cleanup();
-        return 1;
+        g.done = NULL;
+    else {
+        g.done = calloc(g.size, sizeof(struct tab));
+        assert(g.done != NULL && "out of memory");
    }

-    /* find and show maximum inflate table usage */
-    if (root > max)                 /* reduce root to max length */
-        root = max;
-    if ((code_t)syms < ((code_t)1 << (root + 1)))
+    // find and show maximum inflate table usage
+    if (g.root > g.max)             // reduce root to max length
+        g.root = g.max;
+    if ((code_t)syms < ((code_t)1 << (g.root + 1)))
        enough(syms);
    else
-        puts("cannot handle minimum code lengths > root");
+        fputs("cannot handle minimum code lengths > root", stderr);

-    /* done */
+    // done
    cleanup();
    return 0;
 }
@@ -137,7 +137,7 @@ local void rotate(unsigned char *list, unsigned len, unsigned rot)
    /* do simple left shift by one */
    if (rot == 1) {
        tmp = *list;
-        memcpy(list, list + 1, len - 1);
+        memmove(list, list + 1, len - 1);
        *last = tmp;
        return;
    }
@@ -1,8 +1,8 @@
 /*
 * gzlog.c
- * Copyright (C) 2004, 2008, 2012, 2016 Mark Adler, all rights reserved
+ * Copyright (C) 2004, 2008, 2012, 2016, 2019 Mark Adler, all rights reserved
 * For conditions of distribution and use, see copyright notice in gzlog.h
- * version 2.2, 14 Aug 2012
+ * version 2.3, 25 May 2019
 */

 /*
@@ -756,12 +756,14 @@ local int log_recover(struct log *log, int op)
                return -2;
            }
            if ((fd = open(log->path, O_RDONLY, 0)) < 0) {
+                free(data);
                log_log(log, op, ".add file read failure");
                return -1;
            }
            ret = (size_t)read(fd, data, len) != len;
            close(fd);
            if (ret) {
+                free(data);
                log_log(log, op, ".add file read failure");
                return -1;
            }
@@ -0,0 +1,470 @@
+/* gznorm.c -- normalize a gzip stream
+ * Copyright (C) 2018 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ * Version 1.0  7 Oct 2018  Mark Adler */
+
+// gznorm takes a gzip stream, potentially containing multiple members, and
+// converts it to a gzip stream with a single member. In addition the gzip
+// header is normalized, removing the file name and time stamp, and setting the
+// other header contents (XFL, OS) to fixed values. gznorm does not recompress
+// the data, so it is fast, but no advantage is gained from the history that
+// could be available across member boundaries.
+
+#include <stdio.h>      // fread, fwrite, putc, fflush, ferror, fprintf,
+                        // vsnprintf, stdout, stderr, NULL, FILE
+#include <stdlib.h>     // malloc, free
+#include <string.h>     // strerror
+#include <errno.h>      // errno
+#include <stdarg.h>     // va_list, va_start, va_end
+#include "zlib.h"       // inflateInit2, inflate, inflateReset, inflateEnd,
+                        // z_stream, z_off_t, crc32_combine, Z_NULL, Z_BLOCK,
+                        // Z_OK, Z_STREAM_END, Z_BUF_ERROR, Z_DATA_ERROR,
+                        // Z_MEM_ERROR
+
+#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
+#  include <fcntl.h>
+#  include <io.h>
+#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+#  define SET_BINARY_MODE(file)
+#endif
+
+#define local static
+
+// printf to an allocated string. Return the string, or NULL if the printf or
+// allocation fails.
+local char *aprintf(char *fmt, ...) {
+    // Get the length of the result of the printf.
+    va_list args;
+    va_start(args, fmt);
+    int len = vsnprintf(NULL, 0, fmt, args);
+    va_end(args);
+    if (len < 0)
+        return NULL;
+
+    // Allocate the required space and printf to it.
+    char *str = malloc(len + 1);
+    if (str == NULL)
+        return NULL;
+    va_start(args, fmt);
+    vsnprintf(str, len + 1, fmt, args);
+    va_end(args);
+    return str;
+}
+
+// Return with an error, putting an allocated error message in *err. Doing an
+// inflateEnd() on an already ended state, or one with state set to Z_NULL, is
+// permitted.
+#define BYE(...) \
+    do { \
+        inflateEnd(&strm); \
+        *err = aprintf(__VA_ARGS__); \
+        return 1; \
+    } while (0)
+
+// Chunk size for buffered reads and for decompression. Twice this many bytes
+// will be allocated on the stack by gzip_normalize(). Must fit in an unsigned.
+#define CHUNK 16384
+
+// Read a gzip stream from in and write an equivalent normalized gzip stream to
+// out. If given no input, an empty gzip stream will be written. If successful,
+// 0 is returned, and *err is set to NULL. On error, 1 is returned, where the
+// details of the error are returned in *err, a pointer to an allocated string.
+//
+// The input may be a stream with multiple gzip members, which is converted to
+// a single gzip member on the output. Each gzip member is decompressed at the
+// level of deflate blocks. This enables clearing the last-block bit, shifting
+// the compressed data to concatenate to the previous member's compressed data,
+// which can end at an arbitrary bit boundary, and identifying stored blocks in
+// order to resynchronize those to byte boundaries. The deflate compressed data
+// is terminated with a 10-bit empty fixed block. If any members on the input
+// end with a 10-bit empty fixed block, then that block is excised from the
+// stream. This avoids appending empty fixed blocks for every normalization,
+// and assures that gzip_normalize applied a second time will not change the
+// input. The pad bits after stored block headers and after the final deflate
+// block are all forced to zeros.
+local int gzip_normalize(FILE *in, FILE *out, char **err) {
+    // initialize the inflate engine to process a gzip member
+    z_stream strm;
+    strm.zalloc = Z_NULL;
+    strm.zfree = Z_NULL;
+    strm.opaque = Z_NULL;
+    strm.avail_in = 0;
+    strm.next_in = Z_NULL;
+    if (inflateInit2(&strm, 15 + 16) != Z_OK)
+        BYE("out of memory");
+
+    // State while processing the input gzip stream.
+    enum {              // BETWEEN -> HEAD -> BLOCK -> TAIL -> BETWEEN -> ...
+        BETWEEN,        // between gzip members (must end in this state)
+        HEAD,           // reading a gzip header
+        BLOCK,          // reading deflate blocks
+        TAIL            // reading a gzip trailer
+    } state = BETWEEN;              // current component being processed
+    unsigned long crc = 0;          // accumulated CRC of uncompressed data
+    unsigned long len = 0;          // accumulated length of uncompressed data
+    unsigned long buf = 0;          // deflate stream bit buffer of num bits
+    int num = 0;                    // number of bits in buf (at bottom)
+
+    // Write a canonical gzip header (no mod time, file name, comment, extra
+    // block, or extra flags, and OS is marked as unknown).
+    fwrite("\x1f\x8b\x08\0\0\0\0\0\0\xff", 1, 10, out);
+
+    // Process the gzip stream from in until reaching the end of the input,
+    // encountering invalid input, or experiencing an i/o error.
+    int more;                       // true if not at the end of the input
+    do {
+        // State inside this loop.
+        unsigned char *put;         // next input buffer location to process
+        int prev;                   // number of bits from previous block in
+                                    // the bit buffer, or -1 if not at the
+                                    // start of a block
+        unsigned long long memb;    // uncompressed length of member
+        size_t tail;                // number of trailer bytes read (0..8)
+        unsigned long part;         // accumulated trailer component
+
+        // Get the next chunk of input from in.
+        unsigned char dat[CHUNK];
+        strm.avail_in = fread(dat, 1, CHUNK, in);
+        if (strm.avail_in == 0)
+            break;
+        more = strm.avail_in == CHUNK;
+        strm.next_in = put = dat;
+
+        // Run that chunk of input through the inflate engine to exhaustion.
+        do {
+            // At this point it is assured that strm.avail_in > 0.
+
+            // Inflate until the end of a gzip component (header, deflate
+            // block, trailer) is reached, or until all of the chunk is
+            // consumed. The resulting decompressed data is discarded, though
+            // the total size of the decompressed data in each member is
+            // tracked, for the calculation of the total CRC.
+            do {
+                // inflate and handle any errors
+                unsigned char scrap[CHUNK];
+                strm.avail_out = CHUNK;
+                strm.next_out = scrap;
+                int ret = inflate(&strm, Z_BLOCK);
+                if (ret == Z_MEM_ERROR)
+                    BYE("out of memory");
+                if (ret == Z_DATA_ERROR)
+                    BYE("input invalid: %s", strm.msg);
+                if (ret != Z_OK && ret != Z_BUF_ERROR && ret != Z_STREAM_END)
+                    BYE("internal error");
+
+                // Update the number of uncompressed bytes generated in this
+                // member. The actual count (not modulo 2^32) is required to
+                // correctly compute the total CRC.
+                unsigned got = CHUNK - strm.avail_out;
+                memb += got;
+                if (memb < got)
+                    BYE("overflow error");
+
+                // Continue to process this chunk until it is consumed, or
+                // until the end of a component (header, deflate block, or
+                // trailer) is reached.
+            } while (strm.avail_out == 0 && (strm.data_type & 0x80) == 0);
+
+            // Since strm.avail_in was > 0 for the inflate call, some input was
+            // just consumed. It is therefore assured that put < strm.next_in.
+
+            // Disposition the consumed component or part of a component.
+            switch (state) {
+                case BETWEEN:
+                    state = HEAD;
+                    // Fall through to HEAD when some or all of the header is
+                    // processed.
+
+                case HEAD:
+                    // Discard the header.
+                    if (strm.data_type & 0x80) {
+                        // End of header reached -- deflate blocks follow.
+                        put = strm.next_in;
+                        prev = num;
+                        memb = 0;
+                        state = BLOCK;
+                    }
+                    break;
+
+                case BLOCK:
+                    // Copy the deflate stream to the output, but with the
+                    // last-block-bit cleared. Re-synchronize stored block
+                    // headers to the output byte boundaries. The bytes at
+                    // put..strm.next_in-1 is the compressed data that has been
+                    // processed and is ready to be copied to the output.
+
+                    // At this point, it is assured that new compressed data is
+                    // available, i.e., put < strm.next_in. If prev is -1, then
+                    // that compressed data starts in the middle of a deflate
+                    // block. If prev is not -1, then the bits in the bit
+                    // buffer, possibly combined with the bits in *put, contain
+                    // the three-bit header of the new deflate block. In that
+                    // case, prev is the number of bits from the previous block
+                    // that remain in the bit buffer. Since num is the number
+                    // of bits in the bit buffer, we have that num - prev is
+                    // the number of bits from the new block currently in the
+                    // bit buffer.
+
+                    // If strm.data_type & 0xc0 is 0x80, then the last byte of
+                    // the available compressed data includes the last bits of
+                    // the end of a deflate block. In that case, that last byte
+                    // also has strm.data_type & 0x1f bits of the next deflate
+                    // block, in the range 0..7. If strm.data_type & 0xc0 is
+                    // 0xc0, then the last byte of the compressed data is the
+                    // end of the deflate stream, followed by strm.data_type &
+                    // 0x1f pad bits, also in the range 0..7.
+
+                    // Set bits to the number of bits not yet consumed from the
+                    // last byte. If we are at the end of the block, bits is
+                    // either the number of bits in the last byte belonging to
+                    // the next block, or the number of pad bits after the
+                    // final block. In either of those cases, bits is in the
+                    // range 0..7.
+                    ;                   // (required due to C syntax oddity)
+                    int bits = strm.data_type & 0x1f;
+
+                    if (prev != -1) {
+                        // We are at the start of a new block. Clear the last
+                        // block bit, and check for special cases. If it is a
+                        // stored block, then emit the header and pad to the
+                        // next byte boundary. If it is a final, empty fixed
+                        // block, then excise it.
+
+                        // Some or all of the three header bits for this block
+                        // may already be in the bit buffer. Load any remaining
+                        // header bits into the bit buffer.
+                        if (num - prev < 3) {
+                            buf += (unsigned long)*put++ << num;
+                            num += 8;
+                        }
+
+                        // Set last to have a 1 in the position of the last
+                        // block bit in the bit buffer.
+                        unsigned long last = (unsigned long)1 << prev;
+
+                        if (((buf >> prev) & 7) == 3) {
+                            // This is a final fixed block. Load at least ten
+                            // bits from this block, including the header, into
+                            // the bit buffer. We already have at least three,
+                            // so at most one more byte needs to be loaded.
+                            if (num - prev < 10) {
+                                if (put == strm.next_in)
+                                    // Need to go get and process more input.
+                                    // We'll end up back here to finish this.
+                                    break;
+                                buf += (unsigned long)*put++ << num;
+                                num += 8;
+                            }
+                            if (((buf >> prev) & 0x3ff) == 3) {
+                                // That final fixed block is empty. Delete it
+                                // to avoid adding an empty block every time a
+                                // gzip stream is normalized.
+                                num = prev;
+                                buf &= last - 1;    // zero the pad bits
+                            }
+                        }
+                        else if (((buf >> prev) & 6) == 0) {
+                            // This is a stored block. Flush to the next
+                            // byte boundary after the three-bit header.
+                            num = (prev + 10) & ~7;
+                            buf &= last - 1;        // zero the pad bits
+                        }
+
+                        // Clear the last block bit.
+                        buf &= ~last;
+
+                        // Write out complete bytes in the bit buffer.
+                        while (num >= 8) {
+                            putc(buf, out);
+                            buf >>= 8;
+                            num -= 8;
+                        }
+
+                        // If no more bytes left to process, then we have
+                        // consumed the byte that had bits from the next block.
+                        if (put == strm.next_in)
+                            bits = 0;
+                    }
+
+                    // We are done handling the deflate block header. Now copy
+                    // all or almost all of the remaining compressed data that
+                    // has been processed so far. Don't copy one byte at the
+                    // end if it contains bits from the next deflate block or
+                    // pad bits at the end of a deflate block.
+
+                    // mix is 1 if we are at the end of a deflate block, and if
+                    // some of the bits in the last byte follow this block. mix
+                    // is 0 if we are in the middle of a deflate block, if the
+                    // deflate block ended on a byte boundary, or if all of the
+                    // compressed data processed so far has been consumed.
+                    int mix = (strm.data_type & 0x80) && bits;
+
+                    // Copy all of the processed compressed data to the output,
+                    // except for the last byte if it contains bits from the
+                    // next deflate block or pad bits at the end of the deflate
+                    // stream. Copy the data after shifting in num bits from
+                    // buf in front of it, leaving num bits from the end of the
+                    // compressed data in buf when done.
+                    unsigned char *end = strm.next_in - mix;
+                    if (put < end) {
+                        if (num)
+                            // Insert num bits from buf before the data being
+                            // copied.
+                            do {
+                                buf += (unsigned)(*put++) << num;
+                                putc(buf, out);
+                                buf >>= 8;
+                            } while (put < end);
+                        else {
+                            // No shifting needed -- write directly.
+                            fwrite(put, 1, end - put, out);
+                            put = end;
+                        }
+                    }
+
+                    // Process the last processed byte if it wasn't written.
+                    if (mix) {
+                        // Load the last byte into the bit buffer.
+                        buf += (unsigned)(*put++) << num;
+                        num += 8;
+
+                        if (strm.data_type & 0x40) {
+                            // We are at the end of the deflate stream and
+                            // there are bits pad bits. Discard the pad bits
+                            // and write a byte to the output, if available.
+                            // Leave the num bits left over in buf to prepend
+                            // to the next deflate stream.
+                            num -= bits;
+                            if (num >= 8) {
+                                putc(buf, out);
+                                num -= 8;
+                                buf >>= 8;
+                            }
+
+                            // Force the pad bits in the bit buffer to zeros.
+                            buf &= ((unsigned long)1 << num) - 1;
+
+                            // Don't need to set prev here since going to TAIL.
+                        }
+                        else
+                            // At the end of an internal deflate block. Leave
+                            // the last byte in the bit buffer to examine on
+                            // the next entry to BLOCK, when more bits from the
+                            // next block will be available.
+                            prev = num - bits;      // number of bits in buffer
+                                                    // from current block
+                    }
+
+                    // Don't have a byte left over, so we are in the middle of
+                    // a deflate block, or the deflate block ended on a byte
+                    // boundary. Set prev appropriately for the next entry into
+                    // BLOCK.
+                    else if (strm.data_type & 0x80)
+                        // The block ended on a byte boundary, so no header
+                        // bits are in the bit buffer.
+                        prev = num;
+                    else
+                        // In the middle of a deflate block, so no header here.
+                        prev = -1;
+
+                    // Check for the end of the deflate stream.
+                    if ((strm.data_type & 0xc0) == 0xc0) {
+                        // That ends the deflate stream on the input side, the
+                        // pad bits were discarded, and any remaining bits from
+                        // the last block in the stream are saved in the bit
+                        // buffer to prepend to the next stream. Process the
+                        // gzip trailer next.
+                        tail = 0;
+                        part = 0;
+                        state = TAIL;
+                    }
+                    break;
+
+                case TAIL:
+                    // Accumulate available trailer bytes to update the total
+                    // CRC and the total uncompressed length.
+                    do {
+                        part = (part >> 8) + ((unsigned long)(*put++) << 24);
+                        tail++;
+                        if (tail == 4) {
+                            // Update the total CRC.
+                            z_off_t len2 = memb;
+                            if (len2 < 0 || (unsigned long long)len2 != memb)
+                                BYE("overflow error");
+                            crc = crc ? crc32_combine(crc, part, len2) : part;
+                            part = 0;
+                        }
+                        else if (tail == 8) {
+                            // Update the total uncompressed length. (It's ok
+                            // if this sum is done modulo 2^32.)
+                            len += part;
+
+                            // At the end of a member. Set up to inflate an
+                            // immediately following gzip member. (If we made
+                            // it this far, then the trailer was valid.)
+                            if (inflateReset(&strm) != Z_OK)
+                                BYE("internal error");
+                            state = BETWEEN;
+                            break;
+                        }
+                    } while (put < strm.next_in);
+                    break;
+            }
+
+            // Process the input buffer until completely consumed.
+        } while (strm.avail_in > 0);
+
+        // Process input until end of file, invalid input, or i/o error.
+    } while (more);
+
+    // Done with the inflate engine.
+    inflateEnd(&strm);
+
+    // Verify the validity of the input.
+    if (state != BETWEEN)
+        BYE("input invalid: incomplete gzip stream");
+
+    // Write the remaining deflate stream bits, followed by a terminating
+    // deflate fixed block.
+    buf += (unsigned long)3 << num;
+    putc(buf, out);
+    putc(buf >> 8, out);
+    if (num > 6)
+        putc(0, out);
+
+    // Write the gzip trailer, which is the CRC and the uncompressed length
+    // modulo 2^32, both in little-endian order.
+    putc(crc, out);
+    putc(crc >> 8, out);
+    putc(crc >> 16, out);
+    putc(crc >> 24, out);
+    putc(len, out);
+    putc(len >> 8, out);
+    putc(len >> 16, out);
+    putc(len >> 24, out);
+    fflush(out);
+
+    // Check for any i/o errors.
+    if (ferror(in) || ferror(out))
+        BYE("i/o error: %s", strerror(errno));
+
+    // All good!
+    *err = NULL;
+    return 0;
+}
+
+// Normalize the gzip stream on stdin, writing the result to stdout.
+int main(void) {
+    // Avoid end-of-line conversions on evil operating systems.
+    SET_BINARY_MODE(stdin);
+    SET_BINARY_MODE(stdout);
+
+    // Normalize from stdin to stdout, returning 1 on error, 0 if ok.
+    char *err;
+    int ret = gzip_normalize(stdin, stdout, &err);
+    if (ret)
+        fprintf(stderr, "gznorm error: %s\n", err);
+    free(err);
+    return ret;
+}
@@ -1,11 +1,13 @@
 /* zran.c -- example of zlib/gzip stream indexing and random access
- * Copyright (C) 2005, 2012 Mark Adler
+ * Copyright (C) 2005, 2012, 2018 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
-   Version 1.1  29 Sep 2012  Mark Adler */
+ * Version 1.2  14 Oct 2018  Mark Adler */

 /* Version History:
 1.0  29 May 2005  First version
 1.1  29 Sep 2012  Fix memory reallocation error
+ 1.2  14 Oct 2018  Handle gzip streams with multiple members
+                   Add a header file to facilitate usage in applications
 */

 /* Illustrate the use of Z_BLOCK, inflatePrime(), and inflateSetDictionary()
@@ -20,11 +22,11 @@
   the starting file offset and bit of that block, and the 32K bytes of
   uncompressed data that precede that block.  Also the uncompressed offset of
   that block is saved to provide a referece for locating a desired starting
-   point in the uncompressed stream.  build_index() works by decompressing the
-   input zlib or gzip stream a block at a time, and at the end of each block
-   deciding if enough uncompressed data has gone by to justify the creation of
-   a new access point.  If so, that point is saved in a data structure that
-   grows as needed to accommodate the points.
+   point in the uncompressed stream.  deflate_index_build() works by
+   decompressing the input zlib or gzip stream a block at a time, and at the
+   end of each block deciding if enough uncompressed data has gone by to
+   justify the creation of a new access point.  If so, that point is saved in a
+   data structure that grows as needed to accommodate the points.

   To use the index, an offset in the uncompressed data is provided, for which
   the latest access point at or preceding that offset is located in the index.
@@ -43,7 +45,8 @@
   There is some fair bit of overhead to starting inflation for the random
   access, mainly copying the 32K byte dictionary.  So if small pieces of the
   file are being accessed, it would make sense to implement a cache to hold
-   some lookahead and avoid many calls to extract() for small lengths.
+   some lookahead and avoid many calls to deflate_index_extract() for small
+   lengths.

   Another way to build an index would be to use inflateCopy().  That would
   not be constrained to have access points at block boundaries, but requires
@@ -56,30 +59,21 @@
 #include <stdlib.h>
 #include <string.h>
 #include "zlib.h"
+#include "zran.h"

-#define local static
-
-#define SPAN 1048576L       /* desired distance between access points */
 #define WINSIZE 32768U      /* sliding window size */
 #define CHUNK 16384         /* file input buffer size */

-/* access point entry */
+/* Access point entry. */
 struct point {
    off_t out;          /* corresponding offset in uncompressed data */
    off_t in;           /* offset in input file of first full byte */
-    int bits;           /* number of bits (1-7) from byte at in - 1, or 0 */
+    int bits;           /* number of bits (1-7) from byte at in-1, or 0 */
    unsigned char window[WINSIZE];  /* preceding 32K of uncompressed data */
 };

-/* access point list */
-struct access {
-    int have;           /* number of list entries filled in */
-    int size;           /* number of list entries allocated */
-    struct point *list; /* allocated list */
-};
-
-/* Deallocate an index built by build_index() */
-local void free_index(struct access *index)
+/* See comments in zran.h. */
+void deflate_index_free(struct deflate_index *index)
 {
    if (index != NULL) {
        free(index->list);
@@ -87,39 +81,43 @@ local void free_index(struct access *index)
    }
 }

-/* Add an entry to the access point list.  If out of memory, deallocate the
-   existing list and return NULL. */
-local struct access *addpoint(struct access *index, int bits,
-    off_t in, off_t out, unsigned left, unsigned char *window)
+/* Add an entry to the access point list. If out of memory, deallocate the
+   existing list and return NULL. index->gzip is the allocated size of the
+   index in point entries, until it is time for deflate_index_build() to
+   return, at which point gzip is set to indicate a gzip file or not.
+ */
+static struct deflate_index *addpoint(struct deflate_index *index, int bits,
+                                      off_t in, off_t out, unsigned left,
+                                      unsigned char *window)
 {
    struct point *next;

    /* if list is empty, create it (start with eight points) */
    if (index == NULL) {
-        index = malloc(sizeof(struct access));
+        index = malloc(sizeof(struct deflate_index));
        if (index == NULL) return NULL;
        index->list = malloc(sizeof(struct point) << 3);
        if (index->list == NULL) {
            free(index);
            return NULL;
        }
-        index->size = 8;
+        index->gzip = 8;
        index->have = 0;
    }

    /* if list is full, make it bigger */
-    else if (index->have == index->size) {
-        index->size <<= 1;
-        next = realloc(index->list, sizeof(struct point) * index->size);
+    else if (index->have == index->gzip) {
+        index->gzip <<= 1;
+        next = realloc(index->list, sizeof(struct point) * index->gzip);
        if (next == NULL) {
-            free_index(index);
+            deflate_index_free(index);
            return NULL;
        }
        index->list = next;
    }

    /* fill in entry and increment how many we have */
-    next = index->list + index->have;
+    next = (struct point *)(index->list) + index->have;
    next->bits = bits;
    next->in = in;
    next->out = out;
@@ -133,20 +131,14 @@ local struct access *addpoint(struct access *index, int bits,
    return index;
 }

-/* Make one entire pass through the compressed stream and build an index, with
-   access points about every span bytes of uncompressed output -- span is
-   chosen to balance the speed of random access against the memory requirements
-   of the list, about 32K bytes per access point.  Note that data after the end
-   of the first zlib or gzip stream in the file is ignored.  build_index()
-   returns the number of access points on success (>= 1), Z_MEM_ERROR for out
-   of memory, Z_DATA_ERROR for an error in the input file, or Z_ERRNO for a
-   file read error.  On success, *built points to the resulting index. */
-local int build_index(FILE *in, off_t span, struct access **built)
+/* See comments in zran.h. */
+int deflate_index_build(FILE *in, off_t span, struct deflate_index **built)
 {
    int ret;
+    int gzip = 0;               /* true if reading a gzip file */
    off_t totin, totout;        /* our own total counters to avoid 4GB limit */
    off_t last;                 /* totout value of last access point */
-    struct access *index;       /* access points being generated */
+    struct deflate_index *index;    /* access points being generated */
    z_stream strm;
    unsigned char input[CHUNK];
    unsigned char window[WINSIZE];
@@ -163,7 +155,7 @@ local int build_index(FILE *in, off_t span, struct access **built)

    /* inflate the input, maintain a sliding window, and build an index -- this
       also validates the integrity of the compressed data using the check
-       information at the end of the gzip or zlib stream */
+       information in the gzip or zlib stream */
    totin = totout = last = 0;
    index = NULL;               /* will be allocated by first addpoint() */
    strm.avail_out = 0;
@@ -172,14 +164,19 @@ local int build_index(FILE *in, off_t span, struct access **built)
        strm.avail_in = fread(input, 1, CHUNK, in);
        if (ferror(in)) {
            ret = Z_ERRNO;
-            goto build_index_error;
+            goto deflate_index_build_error;
        }
        if (strm.avail_in == 0) {
            ret = Z_DATA_ERROR;
-            goto build_index_error;
+            goto deflate_index_build_error;
        }
        strm.next_in = input;

+        /* check for a gzip stream */
+        if (totin == 0 && strm.avail_in >= 3 &&
+            input[0] == 31 && input[1] == 139 && input[2] == 8)
+            gzip = 1;
+
        /* process all of that, or until end of stream */
        do {
            /* reset sliding window if necessary */
@@ -198,9 +195,17 @@ local int build_index(FILE *in, off_t span, struct access **built)
            if (ret == Z_NEED_DICT)
                ret = Z_DATA_ERROR;
            if (ret == Z_MEM_ERROR || ret == Z_DATA_ERROR)
-                goto build_index_error;
-            if (ret == Z_STREAM_END)
+                goto deflate_index_build_error;
+            if (ret == Z_STREAM_END) {
+                if (gzip &&
+                    (strm.avail_in || ungetc(getc(in), in) != EOF)) {
+                    ret = inflateReset(&strm);
+                    if (ret != Z_OK)
+                        goto deflate_index_build_error;
+                    continue;
+                }
                break;
+            }

            /* if at end of block, consider adding an index entry (note that if
               data_type indicates an end-of-block, then all of the
@@ -217,7 +222,7 @@ local int build_index(FILE *in, off_t span, struct access **built)
                                 totout, strm.avail_out, window);
                if (index == NULL) {
                    ret = Z_MEM_ERROR;
-                    goto build_index_error;
+                    goto deflate_index_build_error;
                }
                last = totout;
            }
@@ -227,27 +232,21 @@ local int build_index(FILE *in, off_t span, struct access **built)
    /* clean up and return index (release unused entries in list) */
    (void)inflateEnd(&strm);
    index->list = realloc(index->list, sizeof(struct point) * index->have);
-    index->size = index->have;
+    index->gzip = gzip;
+    index->length = totout;
    *built = index;
-    return index->size;
+    return index->have;

    /* return error */
-  build_index_error:
+  deflate_index_build_error:
    (void)inflateEnd(&strm);
-    if (index != NULL)
-        free_index(index);
+    deflate_index_free(index);
    return ret;
 }

-/* Use the index to read len bytes from offset into buf, return bytes read or
-   negative for error (Z_DATA_ERROR or Z_MEM_ERROR).  If data is requested past
-   the end of the uncompressed data, then extract() will return a value less
-   than len, indicating how much as actually read into buf.  This function
-   should not return a data error unless the file was modified since the index
-   was generated.  extract() may also return Z_ERRNO if there is an error on
-   reading or seeking the input file. */
-local int extract(FILE *in, struct access *index, off_t offset,
-                  unsigned char *buf, int len)
+/* See comments in zran.h. */
+int deflate_index_extract(FILE *in, struct deflate_index *index, off_t offset,
+                          unsigned char *buf, int len)
 {
    int ret, skip;
    z_stream strm;
@@ -276,12 +275,12 @@ local int extract(FILE *in, struct access *index, off_t offset,
        return ret;
    ret = fseeko(in, here->in - (here->bits ? 1 : 0), SEEK_SET);
    if (ret == -1)
-        goto extract_ret;
+        goto deflate_index_extract_ret;
    if (here->bits) {
        ret = getc(in);
        if (ret == -1) {
            ret = ferror(in) ? Z_ERRNO : Z_DATA_ERROR;
-            goto extract_ret;
+            goto deflate_index_extract_ret;
        }
        (void)inflatePrime(&strm, here->bits, ret >> (8 - here->bits));
    }
@@ -293,21 +292,21 @@ local int extract(FILE *in, struct access *index, off_t offset,
    skip = 1;                               /* while skipping to offset */
    do {
        /* define where to put uncompressed data, and how much */
-        if (offset == 0 && skip) {          /* at offset now */
-            strm.avail_out = len;
-            strm.next_out = buf;
-            skip = 0;                       /* only do this once */
-        }
        if (offset > WINSIZE) {             /* skip WINSIZE bytes */
            strm.avail_out = WINSIZE;
            strm.next_out = discard;
            offset -= WINSIZE;
        }
-        else if (offset != 0) {             /* last skip */
+        else if (offset > 0) {              /* last skip */
            strm.avail_out = (unsigned)offset;
            strm.next_out = discard;
            offset = 0;
        }
+        else if (skip) {                    /* at offset now */
+            strm.avail_out = len;
+            strm.next_out = buf;
+            skip = 0;                       /* only do this once */
+        }

        /* uncompress until avail_out filled, or end of stream */
        do {
@@ -315,11 +314,11 @@ local int extract(FILE *in, struct access *index, off_t offset,
                strm.avail_in = fread(input, 1, CHUNK, in);
                if (ferror(in)) {
                    ret = Z_ERRNO;
-                    goto extract_ret;
+                    goto deflate_index_extract_ret;
                }
                if (strm.avail_in == 0) {
                    ret = Z_DATA_ERROR;
-                    goto extract_ret;
+                    goto deflate_index_extract_ret;
                }
                strm.next_in = input;
            }
@@ -327,41 +326,99 @@ local int extract(FILE *in, struct access *index, off_t offset,
            if (ret == Z_NEED_DICT)
                ret = Z_DATA_ERROR;
            if (ret == Z_MEM_ERROR || ret == Z_DATA_ERROR)
-                goto extract_ret;
-            if (ret == Z_STREAM_END)
-                break;
+                goto deflate_index_extract_ret;
+            if (ret == Z_STREAM_END) {
+                /* the raw deflate stream has ended */
+                if (index->gzip == 0)
+                    /* this is a zlib stream that has ended -- done */
+                    break;
+
+                /* near the end of a gzip member, which might be followed by
+                   another gzip member -- skip the gzip trailer and see if
+                   there is more input after it */
+                if (strm.avail_in < 8) {
+                    fseeko(in, 8 - strm.avail_in, SEEK_CUR);
+                    strm.avail_in = 0;
+                }
+                else {
+                    strm.avail_in -= 8;
+                    strm.next_in += 8;
+                }
+                if (strm.avail_in == 0 && ungetc(getc(in), in) == EOF)
+                    /* the input ended after the gzip trailer -- done */
+                    break;
+
+                /* there is more input, so another gzip member should follow --
+                   validate and skip the gzip header */
+                ret = inflateReset2(&strm, 31);
+                if (ret != Z_OK)
+                    goto deflate_index_extract_ret;
+                do {
+                    if (strm.avail_in == 0) {
+                        strm.avail_in = fread(input, 1, CHUNK, in);
+                        if (ferror(in)) {
+                            ret = Z_ERRNO;
+                            goto deflate_index_extract_ret;
+                        }
+                        if (strm.avail_in == 0) {
+                            ret = Z_DATA_ERROR;
+                            goto deflate_index_extract_ret;
+                        }
+                        strm.next_in = input;
+                    }
+                    ret = inflate(&strm, Z_BLOCK);
+                    if (ret == Z_MEM_ERROR || ret == Z_DATA_ERROR)
+                        goto deflate_index_extract_ret;
+                } while ((strm.data_type & 128) == 0);
+
+                /* set up to continue decompression of the raw deflate stream
+                   that follows the gzip header */
+                ret = inflateReset2(&strm, -15);
+                if (ret != Z_OK)
+                    goto deflate_index_extract_ret;
+            }
+
+            /* continue to process the available input before reading more */
        } while (strm.avail_out != 0);

-        /* if reach end of stream, then don't keep trying to get more */
        if (ret == Z_STREAM_END)
+            /* reached the end of the compressed data -- return the data that
+               was available, possibly less than requested */
            break;

-        /* do until offset reached and requested data read, or stream ends */
+        /* do until offset reached and requested data read */
    } while (skip);

-    /* compute number of uncompressed bytes read after offset */
+    /* compute the number of uncompressed bytes read after the offset */
    ret = skip ? 0 : len - strm.avail_out;

-    /* clean up and return bytes read or error */
-  extract_ret:
+    /* clean up and return the bytes read, or the negative error */
+  deflate_index_extract_ret:
    (void)inflateEnd(&strm);
    return ret;
 }

-/* Demonstrate the use of build_index() and extract() by processing the file
-   provided on the command line, and the extracting 16K from about 2/3rds of
-   the way through the uncompressed output, and writing that to stdout. */
+#ifdef TEST
+
+#define SPAN 1048576L       /* desired distance between access points */
+#define LEN 16384           /* number of bytes to extract */
+
+/* Demonstrate the use of deflate_index_build() and deflate_index_extract() by
+   processing the file provided on the command line, and extracting LEN bytes
+   from 2/3rds of the way through the uncompressed output, writing that to
+   stdout. An offset can be provided as the second argument, in which case the
+   data is extracted from there instead. */
 int main(int argc, char **argv)
 {
    int len;
-    off_t offset;
+    off_t offset = -1;
    FILE *in;
-    struct access *index = NULL;
-    unsigned char buf[CHUNK];
+    struct deflate_index *index = NULL;
+    unsigned char buf[LEN];

    /* open input file */
-    if (argc != 2) {
-        fprintf(stderr, "usage: zran file.gz\n");
+    if (argc < 2 || argc > 3) {
+        fprintf(stderr, "usage: zran file.gz [offset]\n");
        return 1;
    }
    in = fopen(argv[1], "rb");
@@ -370,8 +427,18 @@ int main(int argc, char **argv)
        return 1;
    }

+    /* get optional offset */
+    if (argc == 3) {
+        char *end;
+        offset = strtoll(argv[2], &end, 10);
+        if (*end || offset < 0) {
+            fprintf(stderr, "zran: %s is not a valid offset\n", argv[2]);
+            return 1;
+        }
+    }
+
    /* build index */
-    len = build_index(in, SPAN, &index);
+    len = deflate_index_build(in, SPAN, &index);
    if (len < 0) {
        fclose(in);
        switch (len) {
@@ -392,8 +459,9 @@ int main(int argc, char **argv)
    fprintf(stderr, "zran: built index with %d access points\n", len);

    /* use index by reading some bytes from an arbitrary offset */
-    offset = (index->list[index->have - 1].out << 1) / 3;
-    len = extract(in, index, offset, buf, CHUNK);
+    if (offset == -1)
+        offset = (index->length << 1) / 3;
+    len = deflate_index_extract(in, index, offset, buf, LEN);
    if (len < 0)
        fprintf(stderr, "zran: extraction failed: %s error\n",
                len == Z_MEM_ERROR ? "out of memory" : "input corrupted");
@@ -403,7 +471,9 @@ int main(int argc, char **argv)
    }

    /* clean up and exit */
-    free_index(index);
+    deflate_index_free(index);
    fclose(in);
    return 0;
 }
+
+#endif
@@ -0,0 +1,40 @@
+/* zran.h -- example of zlib/gzip stream indexing and random access
+ * Copyright (C) 2005, 2012, 2018 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ * Version 1.2  14 Oct 2018  Mark Adler */
+
+#include <stdio.h>
+#include "zlib.h"
+
+/* Access point list. */
+struct deflate_index {
+    int have;           /* number of list entries */
+    int gzip;           /* 1 if the index is of a gzip file, 0 if it is of a
+                           zlib stream */
+    off_t length;       /* total length of uncompressed data */
+    void *list;         /* allocated list of entries */
+};
+
+/* Make one entire pass through a zlib or gzip compressed stream and build an
+   index, with access points about every span bytes of uncompressed output.
+   gzip files with multiple members are indexed in their entirety. span should
+   be chosen to balance the speed of random access against the memory
+   requirements of the list, about 32K bytes per access point. The return value
+   is the number of access points on success (>= 1), Z_MEM_ERROR for out of
+   memory, Z_DATA_ERROR for an error in the input file, or Z_ERRNO for a file
+   read error. On success, *built points to the resulting index. */
+int deflate_index_build(FILE *in, off_t span, struct deflate_index **built);
+
+/* Deallocate an index built by deflate_index_build() */
+void deflate_index_free(struct deflate_index *index);
+
+/* Use the index to read len bytes from offset into buf. Return bytes read or
+   negative for error (Z_DATA_ERROR or Z_MEM_ERROR). If data is requested past
+   the end of the uncompressed data, then deflate_index_extract() will return a
+   value less than len, indicating how much was actually read into buf. This
+   function should not return a data error unless the file was modified since
+   the index was generated, since deflate_index_build() validated all of the
+   input. deflate_index_extract() will return Z_ERRNO if there is an error on
+   reading or seeking the input file. */
+int deflate_index_extract(FILE *in, struct deflate_index *index, off_t offset,
+                          unsigned char *buf, int len);
@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -39,7 +39,7 @@
 #  include <io.h>
 #endif

-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32)
 #  define WIDECHAR
 #endif

@@ -190,6 +190,7 @@ typedef struct {
        /* just for writing */
    int level;              /* compression level */
    int strategy;           /* compression strategy */
+    int reset;              /* true if a reset is pending after a Z_FINISH */
        /* seek request */
    z_off64_t skip;         /* amount to skip (already rewound if backwards) */
    int seek;               /* true if seek request pending */
@@ -1,11 +1,11 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004-2017 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

 #include "gzguts.h"

-#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
+#if defined(_WIN32) && !defined(__BORLANDC__)
 #  define LSEEK _lseeki64
 #else
 #if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -81,6 +81,8 @@ local void gz_reset(state)
        state->past = 0;            /* have not read past end yet */
        state->how = LOOK;          /* look for gzip header */
    }
+    else                            /* for writing ... */
+        state->reset = 0;           /* no deflateReset pending */
    state->seek = 0;                /* no seek request pending */
    gz_error(state, Z_OK, NULL);    /* clear error */
    state->x.pos = 0;               /* no uncompressed data yet */
@@ -397,7 +399,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
    /* if within raw area while reading, just go there */
    if (state->mode == GZ_READ && state->how == COPY &&
            state->x.pos + offset >= 0) {
-        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
+        ret = LSEEK(state->fd, offset - (z_off64_t)state->x.have, SEEK_CUR);
        if (ret == -1)
            return -1;
        state->x.have = 0;
@@ -1,5 +1,5 @@
 /* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -314,9 +314,9 @@ local z_size_t gz_read(state, buf, len)
    got = 0;
    do {
        /* set n to the maximum amount of len that fits in an unsigned int */
-        n = -1;
+        n = (unsigned)-1;
        if (n > len)
-            n = len;
+            n = (unsigned)len;

        /* first just try copying data from the output buffer */
        if (state->x.have) {
@@ -397,7 +397,7 @@ int ZEXPORT gzread(file, buf, len)
    }

    /* read len or fewer bytes to buf */
-    len = gz_read(state, buf, len);
+    len = (unsigned)gz_read(state, buf, len);

    /* check for an error */
    if (len == 0 && state->err != Z_OK && state->err != Z_BUF_ERROR)
@@ -447,7 +447,6 @@ z_size_t ZEXPORT gzfread(buf, size, nitems, file)
 int ZEXPORT gzgetc(file)
    gzFile file;
 {
-    int ret;
    unsigned char buf[1];
    gz_statep state;

@@ -469,8 +468,7 @@ int ZEXPORT gzgetc(file)
    }

    /* nothing there -- try gz_read() */
-    ret = gz_read(state, buf, 1);
-    return ret < 1 ? -1 : buf[0];
+    return gz_read(state, buf, 1) < 1 ? -1 : buf[0];
 }

 int ZEXPORT gzgetc_(file)
@@ -1,5 +1,5 @@
 /* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004-2017 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -97,6 +97,15 @@ local int gz_comp(state, flush)
        return 0;
    }

+    /* check for a pending reset */
+    if (state->reset) {
+        /* don't start a new gzip member unless there is data to write */
+        if (strm->avail_in == 0)
+            return 0;
+        deflateReset(strm);
+        state->reset = 0;
+    }
+
    /* run deflate() on provided input until it produces no more output */
    ret = Z_OK;
    do {
@@ -134,7 +143,7 @@ local int gz_comp(state, flush)

    /* if that completed a deflate stream, allow another to start */
    if (flush == Z_FINISH)
-        deflateReset(strm);
+        state->reset = 1;

    /* all done, no errors */
    return 0;
@@ -209,7 +218,7 @@ local z_size_t gz_write(state, buf, len)
                              state->in);
            copy = state->size - have;
            if (copy > len)
-                copy = len;
+                copy = (unsigned)len;
            memcpy(state->in + have, buf, copy);
            state->strm.avail_in += copy;
            state->x.pos += copy;
@@ -229,7 +238,7 @@ local z_size_t gz_write(state, buf, len)
        do {
            unsigned n = (unsigned)-1;
            if (n > len)
-                n = len;
+                n = (unsigned)len;
            state->strm.avail_in = n;
            state->x.pos += n;
            if (gz_comp(state, Z_NO_FLUSH) == -1)
@@ -349,12 +358,11 @@ int ZEXPORT gzputc(file, c)
 }

 /* -- see zlib.h -- */
-int ZEXPORT gzputs(file, str)
+int ZEXPORT gzputs(file, s)
    gzFile file;
-    const char *str;
+    const char *s;
 {
-    int ret;
-    z_size_t len;
+    z_size_t len, put;
    gz_statep state;

    /* get internal structure */
@@ -367,9 +375,13 @@ int ZEXPORT gzputs(file, str)
        return -1;

    /* write string */
-    len = strlen(str);
-    ret = gz_write(state, str, len);
-    return ret == 0 && len != 0 ? -1 : ret;
+    len = strlen(s);
+    if ((int)len < 0 || (unsigned)len != len) {
+        gz_error(state, Z_STREAM_ERROR, "string length does not fit in int");
+        return -1;
+    }
+    put = gz_write(state, s, len);
+    return put < len ? -1 : (int)len;
 }

 #if defined(STDC) || defined(Z_HAVE_STDARG_H)
@@ -441,7 +453,7 @@ int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
        strm->avail_in = state->size;
        if (gz_comp(state, Z_NO_FLUSH) == -1)
            return state->err;
-        memcpy(state->in, state->in + state->size, left);
+        memmove(state->in, state->in + state->size, left);
        strm->next_in = state->in;
        strm->avail_in = left;
    }
@@ -540,7 +552,7 @@ int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
        strm->avail_in = state->size;
        if (gz_comp(state, Z_NO_FLUSH) == -1)
            return state->err;
-        memcpy(state->in, state->in + state->size, left);
+        memmove(state->in, state->in + state->size, left);
        strm->next_in = state->in;
        strm->avail_in = left;
    }
@@ -1,5 +1,5 @@
 /* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -477,6 +477,7 @@ void FAR *out_desc;
            }
            Tracev((stderr, "inflate:       codes ok\n"));
            state->mode = LEN;
+                /* fallthrough */

        case LEN:
            /* use inflate_fast() if we have enough input and output */
@@ -70,7 +70,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
    code const FAR *dcode;      /* local strm->distcode */
    unsigned lmask;             /* mask for first level of length codes */
    unsigned dmask;             /* mask for first level of distance codes */
-    code here;                  /* retrieved table entry */
+    code const *here;           /* retrieved table entry */
    unsigned op;                /* code bits, operation, extra bits, or */
                                /*  window position, window bytes to copy */
    unsigned len;               /* match length, unused bytes */
@@ -107,20 +107,20 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
            hold += (unsigned long)(*in++) << bits;
            bits += 8;
        }
-        here = lcode[hold & lmask];
+        here = lcode + (hold & lmask);
      dolen:
-        op = (unsigned)(here.bits);
+        op = (unsigned)(here->bits);
        hold >>= op;
        bits -= op;
-        op = (unsigned)(here.op);
+        op = (unsigned)(here->op);
        if (op == 0) {                          /* literal */
-            Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
+            Tracevv((stderr, here->val >= 0x20 && here->val < 0x7f ?
                    "inflate:         literal '%c'\n" :
-                    "inflate:         literal 0x%02x\n", here.val));
-            *out++ = (unsigned char)(here.val);
+                    "inflate:         literal 0x%02x\n", here->val));
+            *out++ = (unsigned char)(here->val);
        }
        else if (op & 16) {                     /* length base */
-            len = (unsigned)(here.val);
+            len = (unsigned)(here->val);
            op &= 15;                           /* number of extra bits */
            if (op) {
                if (bits < op) {
@@ -138,14 +138,14 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                hold += (unsigned long)(*in++) << bits;
                bits += 8;
            }
-            here = dcode[hold & dmask];
+            here = dcode + (hold & dmask);
          dodist:
-            op = (unsigned)(here.bits);
+            op = (unsigned)(here->bits);
            hold >>= op;
            bits -= op;
-            op = (unsigned)(here.op);
+            op = (unsigned)(here->op);
            if (op & 16) {                      /* distance base */
-                dist = (unsigned)(here.val);
+                dist = (unsigned)(here->val);
                op &= 15;                       /* number of extra bits */
                if (bits < op) {
                    hold += (unsigned long)(*in++) << bits;
@@ -264,7 +264,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
                }
            }
            else if ((op & 64) == 0) {          /* 2nd level distance code */
-                here = dcode[here.val + (hold & ((1U << op) - 1))];
+                here = dcode + here->val + (hold & ((1U << op) - 1));
                goto dodist;
            }
            else {
@@ -274,7 +274,7 @@ unsigned start;         /* inflate()'s starting value for strm->avail_out */
            }
        }
        else if ((op & 64) == 0) {              /* 2nd level length code */
-            here = lcode[here.val + (hold & ((1U << op) - 1))];
+            here = lcode + here->val + (hold & ((1U << op) - 1));
            goto dolen;
        }
        else if (op & 32) {                     /* end-of-block */
@@ -1,5 +1,5 @@
 /* inflate.c -- zlib decompression
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -130,6 +130,7 @@ z_streamp strm;
    state->mode = HEAD;
    state->last = 0;
    state->havedict = 0;
+    state->flags = -1;
    state->dmax = 32768U;
    state->head = Z_NULL;
    state->hold = 0;
@@ -447,10 +448,10 @@ unsigned copy;

 /* check function to use adler32() for zlib or crc32() for gzip */
 #ifdef GUNZIP
-#  define UPDATE(check, buf, len) \
+#  define UPDATE_CHECK(check, buf, len) \
    (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
 #else
-#  define UPDATE(check, buf, len) adler32(check, buf, len)
+#  define UPDATE_CHECK(check, buf, len) adler32(check, buf, len)
 #endif

 /* check macros for header crc */
@@ -670,7 +671,6 @@ int flush;
                state->mode = FLAGS;
                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 */
@@ -697,6 +697,7 @@ int flush;
                break;
            }
            state->dmax = 1U << len;
+            state->flags = 0;               /* indicate zlib header */
            Tracev((stderr, "inflate:   zlib header ok\n"));
            strm->adler = state->check = adler32(0L, Z_NULL, 0);
            state->mode = hold & 0x200 ? DICTID : TYPE;
@@ -722,6 +723,7 @@ int flush;
                CRC2(state->check, hold);
            INITBITS();
            state->mode = TIME;
+                /* fallthrough */
        case TIME:
            NEEDBITS(32);
            if (state->head != Z_NULL)
@@ -730,6 +732,7 @@ int flush;
                CRC4(state->check, hold);
            INITBITS();
            state->mode = OS;
+                /* fallthrough */
        case OS:
            NEEDBITS(16);
            if (state->head != Z_NULL) {
@@ -740,6 +743,7 @@ int flush;
                CRC2(state->check, hold);
            INITBITS();
            state->mode = EXLEN;
+                /* fallthrough */
        case EXLEN:
            if (state->flags & 0x0400) {
                NEEDBITS(16);
@@ -753,6 +757,7 @@ int flush;
            else if (state->head != Z_NULL)
                state->head->extra = Z_NULL;
            state->mode = EXTRA;
+                /* fallthrough */
        case EXTRA:
            if (state->flags & 0x0400) {
                copy = state->length;
@@ -775,6 +780,7 @@ int flush;
            }
            state->length = 0;
            state->mode = NAME;
+                /* fallthrough */
        case NAME:
            if (state->flags & 0x0800) {
                if (have == 0) goto inf_leave;
@@ -796,6 +802,7 @@ int flush;
                state->head->name = Z_NULL;
            state->length = 0;
            state->mode = COMMENT;
+                /* fallthrough */
        case COMMENT:
            if (state->flags & 0x1000) {
                if (have == 0) goto inf_leave;
@@ -816,6 +823,7 @@ int flush;
            else if (state->head != Z_NULL)
                state->head->comment = Z_NULL;
            state->mode = HCRC;
+                /* fallthrough */
        case HCRC:
            if (state->flags & 0x0200) {
                NEEDBITS(16);
@@ -839,6 +847,7 @@ int flush;
            strm->adler = state->check = ZSWAP32(hold);
            INITBITS();
            state->mode = DICT;
+                /* fallthrough */
        case DICT:
            if (state->havedict == 0) {
                RESTORE();
@@ -846,8 +855,10 @@ int flush;
            }
            strm->adler = state->check = adler32(0L, Z_NULL, 0);
            state->mode = TYPE;
+                /* fallthrough */
        case TYPE:
            if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
        case TYPEDO:
            if (state->last) {
                BYTEBITS();
@@ -898,8 +909,10 @@ int flush;
            INITBITS();
            state->mode = COPY_;
            if (flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
        case COPY_:
            state->mode = COPY;
+                /* fallthrough */
        case COPY:
            copy = state->length;
            if (copy) {
@@ -935,6 +948,7 @@ int flush;
            Tracev((stderr, "inflate:       table sizes ok\n"));
            state->have = 0;
            state->mode = LENLENS;
+                /* fallthrough */
        case LENLENS:
            while (state->have < state->ncode) {
                NEEDBITS(3);
@@ -956,6 +970,7 @@ int flush;
            Tracev((stderr, "inflate:       code lengths ok\n"));
            state->have = 0;
            state->mode = CODELENS;
+                /* fallthrough */
        case CODELENS:
            while (state->have < state->nlen + state->ndist) {
                for (;;) {
@@ -1039,8 +1054,10 @@ int flush;
            Tracev((stderr, "inflate:       codes ok\n"));
            state->mode = LEN_;
            if (flush == Z_TREES) goto inf_leave;
+                /* fallthrough */
        case LEN_:
            state->mode = LEN;
+                /* fallthrough */
        case LEN:
            if (have >= 6 && left >= 258) {
                RESTORE();
@@ -1090,6 +1107,7 @@ int flush;
            }
            state->extra = (unsigned)(here.op) & 15;
            state->mode = LENEXT;
+                /* fallthrough */
        case LENEXT:
            if (state->extra) {
                NEEDBITS(state->extra);
@@ -1100,6 +1118,7 @@ int flush;
            Tracevv((stderr, "inflate:         length %u\n", state->length));
            state->was = state->length;
            state->mode = DIST;
+                /* fallthrough */
        case DIST:
            for (;;) {
                here = state->distcode[BITS(state->distbits)];
@@ -1127,6 +1146,7 @@ int flush;
            state->offset = (unsigned)here.val;
            state->extra = (unsigned)(here.op) & 15;
            state->mode = DISTEXT;
+                /* fallthrough */
        case DISTEXT:
            if (state->extra) {
                NEEDBITS(state->extra);
@@ -1143,6 +1163,7 @@ int flush;
 #endif
            Tracevv((stderr, "inflate:         distance %u\n", state->offset));
            state->mode = MATCH;
+                /* fallthrough */
        case MATCH:
            if (left == 0) goto inf_leave;
            copy = out - left;
@@ -1202,7 +1223,7 @@ int flush;
                state->total += out;
                if ((state->wrap & 4) && out)
                    strm->adler = state->check =
-                        UPDATE(state->check, put - out, out);
+                        UPDATE_CHECK(state->check, put - out, out);
                out = left;
                if ((state->wrap & 4) && (
 #ifdef GUNZIP
@@ -1218,10 +1239,11 @@ int flush;
            }
 #ifdef GUNZIP
            state->mode = LENGTH;
+                /* fallthrough */
        case LENGTH:
            if (state->wrap && state->flags) {
                NEEDBITS(32);
-                if (hold != (state->total & 0xffffffffUL)) {
+                if ((state->wrap & 4) && hold != (state->total & 0xffffffff)) {
                    strm->msg = (char *)"incorrect length check";
                    state->mode = BAD;
                    break;
@@ -1231,6 +1253,7 @@ int flush;
            }
 #endif
            state->mode = DONE;
+                /* fallthrough */
        case DONE:
            ret = Z_STREAM_END;
            goto inf_leave;
@@ -1240,6 +1263,7 @@ int flush;
        case MEM:
            return Z_MEM_ERROR;
        case SYNC:
+                /* fallthrough */
        default:
            return Z_STREAM_ERROR;
        }
@@ -1265,7 +1289,7 @@ int flush;
    state->total += out;
    if ((state->wrap & 4) && out)
        strm->adler = state->check =
-            UPDATE(state->check, strm->next_out - out, out);
+            UPDATE_CHECK(state->check, strm->next_out - out, out);
    strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
                      (state->mode == TYPE ? 128 : 0) +
                      (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
@@ -1401,6 +1425,7 @@ int ZEXPORT inflateSync(strm)
 z_streamp strm;
 {
    unsigned len;               /* number of bytes to look at or looked at */
+    int flags;                  /* temporary to save header status */
    unsigned long in, out;      /* temporary to save total_in and total_out */
    unsigned char buf[4];       /* to restore bit buffer to byte string */
    struct inflate_state FAR *state;
@@ -1433,9 +1458,15 @@ z_streamp strm;

    /* return no joy or set up to restart inflate() on a new block */
    if (state->have != 4) return Z_DATA_ERROR;
+    if (state->flags == -1)
+        state->wrap = 0;    /* if no header yet, treat as raw */
+    else
+        state->wrap &= ~4;  /* no point in computing a check value now */
+    flags = state->flags;
    in = strm->total_in;  out = strm->total_out;
    inflateReset(strm);
    strm->total_in = in;  strm->total_out = out;
+    state->flags = flags;
    state->mode = TYPE;
    return Z_OK;
 }
@@ -1531,7 +1562,7 @@ int check;

    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
    state = (struct inflate_state FAR *)strm->state;
-    if (check)
+    if (check && state->wrap)
        state->wrap |= 4;
    else
        state->wrap &= ~4;
@@ -1,5 +1,5 @@
 /* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2016 Mark Adler
+ * Copyright (C) 1995-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -86,7 +86,8 @@ struct inflate_state {
    int wrap;                   /* bit 0 true for zlib, bit 1 true for gzip,
                                   bit 2 true to validate check value */
    int havedict;               /* true if dictionary provided */
-    int flags;                  /* gzip header method and flags (0 if zlib) */
+    int flags;                  /* gzip header method and flags, 0 if zlib, or
+                                   -1 if raw or no header yet */
    unsigned dmax;              /* zlib header max distance (INFLATE_STRICT) */
    unsigned long check;        /* protected copy of check value */
    unsigned long total;        /* protected copy of output count */
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2017 Mark Adler
+ * Copyright (C) 1995-2022 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -9,7 +9,7 @@
 #define MAXBITS 15

 const char inflate_copyright[] =
-   " inflate 1.2.11 Copyright 1995-2017 Mark Adler ";
+   " inflate 1.2.12 Copyright 1995-2022 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, 202};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 199, 202};
    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,
@@ -1,4 +1,4 @@
-        ZLIB version 1.2.11 for OS/400 installation instructions
+        ZLIB version 1.2.12 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)
@@ -1,7 +1,7 @@
      *  ZLIB.INC - Interface to the general purpose compression library
      *
      *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-      *  Version 1.2.11
+      *  Version 1.2.12
      *
      *
      *  WARNING:
@@ -22,12 +22,12 @@
      *
      *  Versioning information.
      *
-     D ZLIB_VERSION    C                   '1.2.11'
+     D ZLIB_VERSION    C                   '1.2.12'
     D ZLIB_VERNUM     C                   X'12a0'
     D ZLIB_VER_MAJOR  C                   1
     D ZLIB_VER_MINOR  C                   2
     D ZLIB_VER_REVISION...
-     D                 C                   11
+     D                 C                   12
     D ZLIB_VER_SUBREVISION...
     D                 C                   0
      *
@@ -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.1.2.11" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.11"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.11"/>
-         <QPG:Add file="../libz.so.1.2.11" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.2.12" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.2.12"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.2.12"/>
+         <QPG:Add file="../libz.so.1.2.12" install="/opt/lib/" component="slib"/>
      </QPG:Files>

      <QPG:PackageFilter>
@@ -63,7 +63,7 @@
            </QPM:ProductDescription>

            <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.2.11</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.2.12</QPM:ReleaseVersion>
               <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
               <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
               <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
@@ -440,9 +440,8 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
    CHECK_ERR(err, "inflateSync");

    err = inflate(&d_stream, Z_FINISH);
-    if (err != Z_DATA_ERROR) {
-        fprintf(stderr, "inflate should report DATA_ERROR\n");
-        /* Because of incorrect adler32 */
+    if (err != Z_STREAM_END) {
+        fprintf(stderr, "inflate should report Z_STREAM_END\n");
        exit(1);
    }
    err = inflateEnd(&d_stream);
@@ -1,6 +1,6 @@
 <?xml version="1.0" ?>
-<package name="zlib" version="1.2.11">
-    <library name="zlib" dlversion="1.2.11" dlname="z">
+<package name="zlib" version="1.2.12">
+    <library name="zlib" dlversion="1.2.12" dlname="z">
 	<property name="description"> zip compression library </property>
 	<property name="include-target-dir" value="$(@PACKAGE/install-includedir)" />

@@ -1,5 +1,5 @@
 /* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2017 Jean-loup Gailly
+ * Copyright (C) 1995-2021 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
 */
@@ -149,7 +149,7 @@ local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
 local void compress_block OF((deflate_state *s, const ct_data *ltree,
                              const ct_data *dtree));
 local int  detect_data_type OF((deflate_state *s));
-local unsigned bi_reverse OF((unsigned value, int length));
+local unsigned bi_reverse OF((unsigned code, int len));
 local void bi_windup      OF((deflate_state *s));
 local void bi_flush       OF((deflate_state *s));

@@ -416,7 +416,7 @@ local void init_block(s)

    s->dyn_ltree[END_BLOCK].Freq = 1;
    s->opt_len = s->static_len = 0L;
-    s->last_lit = s->matches = 0;
+    s->sym_next = s->matches = 0;
 }

 #define SMALLEST 1
@@ -870,7 +870,8 @@ void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last)
    bi_windup(s);        /* align on byte boundary */
    put_short(s, (ush)stored_len);
    put_short(s, (ush)~stored_len);
-    zmemcpy(s->pending_buf + s->pending, (Bytef *)buf, stored_len);
+    if (stored_len)
+        zmemcpy(s->pending_buf + s->pending, (Bytef *)buf, stored_len);
    s->pending += stored_len;
 #ifdef ZLIB_DEBUG
    s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
@@ -947,7 +948,7 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)

        Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
                opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
-                s->last_lit));
+                s->sym_next / 3));

        if (static_lenb <= opt_lenb) opt_lenb = static_lenb;

@@ -1016,8 +1017,9 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc)
    unsigned dist;  /* distance of matched string */
    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
 {
-    s->d_buf[s->last_lit] = (ush)dist;
-    s->l_buf[s->last_lit++] = (uch)lc;
+    s->sym_buf[s->sym_next++] = dist;
+    s->sym_buf[s->sym_next++] = dist >> 8;
+    s->sym_buf[s->sym_next++] = lc;
    if (dist == 0) {
        /* lc is the unmatched char */
        s->dyn_ltree[lc].Freq++;
@@ -1032,30 +1034,7 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc)
        s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
        s->dyn_dtree[d_code(dist)].Freq++;
    }
-
-#ifdef TRUNCATE_BLOCK
-    /* Try to guess if it is profitable to stop the current block here */
-    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
-        /* Compute an upper bound for the compressed length */
-        ulg out_length = (ulg)s->last_lit*8L;
-        ulg in_length = (ulg)((long)s->strstart - s->block_start);
-        int dcode;
-        for (dcode = 0; dcode < D_CODES; dcode++) {
-            out_length += (ulg)s->dyn_dtree[dcode].Freq *
-                (5L+extra_dbits[dcode]);
-        }
-        out_length >>= 3;
-        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
-               s->last_lit, in_length, out_length,
-               100L - out_length*100L/in_length));
-        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
-    }
-#endif
-    return (s->last_lit == s->lit_bufsize-1);
-    /* We avoid equality with lit_bufsize because of wraparound at 64K
-     * on 16 bit machines and because stored blocks are restricted to
-     * 64K-1 bytes.
-     */
+    return (s->sym_next == s->sym_end);
 }

 /* ===========================================================================
@@ -1068,13 +1047,14 @@ local void compress_block(s, ltree, dtree)
 {
    unsigned dist;      /* distance of matched string */
    int lc;             /* match length or unmatched char (if dist == 0) */
-    unsigned lx = 0;    /* running index in l_buf */
+    unsigned sx = 0;    /* running index in sym_buf */
    unsigned code;      /* the code to send */
    int extra;          /* number of extra bits to send */

-    if (s->last_lit != 0) do {
-        dist = s->d_buf[lx];
-        lc = s->l_buf[lx++];
+    if (s->sym_next != 0) do {
+        dist = s->sym_buf[sx++] & 0xff;
+        dist += (unsigned)(s->sym_buf[sx++] & 0xff) << 8;
+        lc = s->sym_buf[sx++];
        if (dist == 0) {
            send_code(s, lc, ltree); /* send a literal byte */
            Tracecv(isgraph(lc), (stderr," '%c' ", lc));
@@ -1099,11 +1079,10 @@ local void compress_block(s, ltree, dtree)
            }
        } /* literal or match pair ? */

-        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
-        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
-               "pendingBuf overflow");
+        /* Check that the overlay between pending_buf and sym_buf is ok: */
+        Assert(s->pending < s->lit_bufsize + sx, "pendingBuf overflow");

-    } while (lx < s->last_lit);
+    } while (sx < s->sym_next);

    send_code(s, END_BLOCK, ltree);
 }
@@ -1112,9 +1091,9 @@ local void compress_block(s, ltree, dtree)
 * Check if the data type is TEXT or BINARY, using the following algorithm:
 * - TEXT if the two conditions below are satisfied:
 *    a) There are no non-portable control characters belonging to the
- *       "black list" (0..6, 14..25, 28..31).
+ *       "block list" (0..6, 14..25, 28..31).
 *    b) There is at least one printable character belonging to the
- *       "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
+ *       "allow list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
 * - BINARY otherwise.
 * - The following partially-portable control characters form a
 *   "gray list" that is ignored in this detection algorithm:
@@ -1124,19 +1103,19 @@ local void compress_block(s, ltree, dtree)
 local int detect_data_type(s)
    deflate_state *s;
 {
-    /* black_mask is the bit mask of black-listed bytes
+    /* block_mask is the bit mask of block-listed bytes
     * set bits 0..6, 14..25, and 28..31
     * 0xf3ffc07f = binary 11110011111111111100000001111111
     */
-    unsigned long black_mask = 0xf3ffc07fUL;
+    unsigned long block_mask = 0xf3ffc07fUL;
    int n;

-    /* Check for non-textual ("black-listed") bytes. */
-    for (n = 0; n <= 31; n++, black_mask >>= 1)
-        if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0))
+    /* Check for non-textual ("block-listed") bytes. */
+    for (n = 0; n <= 31; n++, block_mask >>= 1)
+        if ((block_mask & 1) && (s->dyn_ltree[n].Freq != 0))
            return Z_BINARY;

-    /* Check for textual ("white-listed") bytes. */
+    /* Check for textual ("allow-listed") bytes. */
    if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0
            || s->dyn_ltree[13].Freq != 0)
        return Z_TEXT;
@@ -1144,7 +1123,7 @@ local int detect_data_type(s)
        if (s->dyn_ltree[n].Freq != 0)
            return Z_TEXT;

-    /* There are no "black-listed" or "white-listed" bytes:
+    /* There are no "block-listed" or "allow-listed" bytes:
     * this stream either is empty or has tolerated ("gray-listed") bytes only.
     */
    return Z_BINARY;
@@ -3,7 +3,6 @@
 #
 # Usage:
 #  make -f win32/Makefile.bor
-#  make -f win32/Makefile.bor LOCAL_ZLIB=-DASMV OBJA=match.obj OBJPA=+match.obj

 # ------------ Borland C++ ------------

@@ -11,10 +11,6 @@
 #
 #   make -fwin32/Makefile.gcc;  make test testdll -fwin32/Makefile.gcc
 #
-# To use the asm code, type:
-#   cp contrib/asm?86/match.S ./match.S
-#   make LOC=-DASMV OBJA=match.o -fwin32/Makefile.gcc
-#
 # To install libz.a, zconf.h and zlib.h in the system directories, type:
 #
 #   make install -fwin32/Makefile.gcc
@@ -38,7 +34,6 @@ IMPLIB    = libz.dll.a
 #
 SHARED_MODE=0

-#LOC = -DASMV
 #LOC = -DZLIB_DEBUG -g

 PREFIX =
@@ -4,10 +4,6 @@
 # Usage:
 #   nmake -f win32/Makefile.msc                          (standard build)
 #   nmake -f win32/Makefile.msc LOC=-DFOO                (nonstandard build)
-#   nmake -f win32/Makefile.msc LOC="-DASMV -DASMINF" \
-#         OBJA="inffas32.obj match686.obj"               (use ASM code, x86)
-#   nmake -f win32/Makefile.msc AS=ml64 LOC="-DASMV -DASMINF -I." \
-#         OBJA="inffasx64.obj gvmat64.obj inffas8664.obj"  (use ASM code, x64)

 # The toplevel directory of the source tree.
 #
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.2.11 is a general purpose data compression library.  All the code is
+zlib 1.2.12 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)
@@ -22,7 +22,7 @@ before asking for help.

 Manifest:

-The package zlib-1.2.11-win32-x86.zip will contain the following files:
+The package zlib-1.2.12-win32-x86.zip will contain the following files:

  README-WIN32.txt This document
  ChangeLog        Changes since previous zlib packages
@@ -69,6 +69,7 @@ EXPORTS
    gzoffset64
    adler32_combine64
    crc32_combine64
+    crc32_combine_gen64
 ; checksum functions
    adler32
    adler32_z
@@ -76,6 +77,8 @@ EXPORTS
    crc32_z
    adler32_combine
    crc32_combine
+    crc32_combine_gen
+    crc32_combine_op
 ; various hacks, don't look :)
    deflateInit_
    deflateInit2_