Always use UCHAR() with isxdigit(). doc fix

Fix bug with octal. Add floating point example to doc.
Use system isxdigit.
2023-09-01 17:03:36 +00:00 · 2023-09-01 15:17:41 +00:00 · 2023-09-01 02:26:56 +00:00 · 2023-09-01 02:06:48 +00:00 · 2023-09-01 01:15:50 +00:00 · 2023-08-31 13:14:34 +00:00
1022 changed files with 73801 additions and 82841 deletions
@@ -12,8 +12,11 @@ libtommath/*.dsp
 libtommath/*.sln
 libtommath/*.vcproj
 tools/tcl.wse.in
-win/*.bat
-win/*.vc
+win/buildall.vc.bat
 win/coffbase.txt
+win/makefile.vc
+win/rules.vc
+win/rules-ext.vc
+win/targets.vc
 win/tcl.dsp
 win/tcl.dsw
@@ -60,12 +60,10 @@ unix/tcl.pc
 unix/tclIndex
 unix/Tcl-Info.plist
 unix/Tclsh-Info.plist
-unix/pkgs8/*
 unix/pkgs/*
 win/Debug*
 win/Release*
 win/*.manifest
-win/pkgs8/*
 win/pkgs/*
 win/coffbase.txt
 win/tcl.hpj
@@ -23,8 +23,6 @@
 # Declare files that will always have CRLF line endings on checkout.
 *.bat eol=crlf
 *.cs eol=crlf
-*.dsp eol=crlf
-*.dsw eol=crlf
 *.sln eol=crlf
 *.vc eol=crlf

@@ -3,64 +3,52 @@ on:
  push:
    branches:
    - "main"
-    - "core-9-0-branch"
+    - "core-8-branch"
+    - "core-8-6-branch"
    tags:
    - "core-**"
 permissions:
  contents: read
 jobs:
  gcc:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-22.04
    strategy:
      matrix:
-        config:
+        cfgopt:
          - ""
+          - "CFLAGS=-DTCL_UTF_MAX=3"
          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
          - "--disable-shared"
-          - "--disable-zipfs"
          - "--enable-symbols"
          - "--enable-symbols=mem"
          - "--enable-symbols=all"
-          - "CFLAGS=-ftrapv"
-          # Duplicated below
-          - "CFLAGS=-m32 CPPFLAGS=-m32 LDFLAGS=-m32 --disable-64bit"
    defaults:
      run:
        shell: bash
        working-directory: unix
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        timeout-minutes: 5
-      - name: Install 32-bit dependencies if needed
-        # Duplicated from above
-        if: ${{ matrix.config == 'CFLAGS=-m32 CPPFLAGS=-m32 LDFLAGS=-m32 --disable-64bit' }}
-        run: |
-          sudo apt-get update
-          sudo apt-get install gcc-multilib libc6-dev-i386
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
        working-directory: generic
-      - name: Configure ${{ matrix.config }}
+      - name: Configure ${{ matrix.cfgopt }}
        run: |
          mkdir "${HOME}/install dir"
          ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
        env:
-          CFGOPT: ${{ matrix.config }}
+          CFGOPT: ${{ matrix.cfgopt }}
        timeout-minutes: 5
      - name: Build
        run: |
-          make -j4 all
+          make all
        timeout-minutes: 5
      - name: Build Test Harness
        run: |
-          make -j4 tcltest
+          make tcltest
        timeout-minutes: 5
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Run Tests
        run: |
          make test
@@ -3,45 +3,45 @@ on:
  push:
    branches:
    - "main"
-    - "core-9-0-branch"
+    - "core-8-branch"
+    - "core-8-6-branch"
    tags:
    - "core-**"
 permissions:
  contents: read
 jobs:
  xcode:
-    runs-on: macos-15
+    runs-on: macos-11
    defaults:
      run:
        shell: bash
        working-directory: macosx
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        timeout-minutes: 5
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
        working-directory: generic
      - name: Build
-        run: make -j4 all
+        run: make all
        env:
          CFLAGS: -arch x86_64 -arch arm64
        timeout-minutes: 15
      - name: Run Tests
-        run: make -j4 test styles=develop
+        run: make test styles=develop
        env:
          ERROR_ON_FAILURES: 1
          MAC_CI: 1
        timeout-minutes: 15
  clang:
-    runs-on: macos-15
+    runs-on: macos-11
    strategy:
      matrix:
-        config:
+        cfgopt:
          - ""
          - "--disable-shared"
-          - "--disable-zipfs"
          - "--enable-symbols"
          - "--enable-symbols=mem"
          - "--enable-symbols=all"
@@ -51,30 +51,26 @@ jobs:
        working-directory: unix
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        timeout-minutes: 5
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
          mkdir "$HOME/install dir"
        working-directory: generic
-      - name: Configure ${{ matrix.config }}
+      - name: Configure ${{ matrix.cfgopt }}
        # Note that macOS is always a 64 bit platform
        run: ./configure --enable-dtrace --enable-framework ${CFGOPT} "--prefix=$HOME/install" || (cat config.log && exit 1)
        env:
          CFLAGS: -arch x86_64 -arch arm64
-          CFGOPT: ${{ matrix.config }}
+          CFGOPT: ${{ matrix.cfgopt }}
        timeout-minutes: 5
      - name: Build
        run: |
-          make -j4 all tcltest
+          make all tcltest
        env:
          CFLAGS: -arch x86_64 -arch arm64
        timeout-minutes: 15
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Run Tests
        run: |
          make test
@@ -3,7 +3,7 @@ on:
  push:
    branches:
    - "main"
-    - "core-9-0-branch"
+    - "core-8-branch"
    tags:
    - "core-**"
 permissions:
@@ -11,14 +11,14 @@ permissions:
 jobs:
  linux:
    name: Linux
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
    defaults:
      run:
        shell: bash
    timeout-minutes: 10
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
      - name: Prepare
        run: |
          touch generic/tclStubInit.c generic/tclOOStubInit.c
@@ -40,30 +40,23 @@ jobs:
          chmod +x tclsh${TCL_PATCHLEVEL}_snapshot
          tar -cf tclsh${TCL_PATCHLEVEL}_snapshot.tar tclsh${TCL_PATCHLEVEL}_snapshot
        working-directory: 1dist
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Upload
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Linux single-file build (snapshot)
          path: 1dist/*.tar
-        id: upload
-    outputs:
-      url: ${{ steps.upload.outputs.artifact-url }}
  macos:
    name: macOS
-    runs-on: macos-13
+    runs-on: macos-11
    defaults:
      run:
        shell: bash
    timeout-minutes: 10
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
      - name: Checkout create-dmg
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        with:
          repository: create-dmg/create-dmg
          ref: v1.0.8
@@ -72,7 +65,7 @@ jobs:
        run: |
          mkdir 1dist
          touch generic/tclStubInit.c generic/tclOOStubInit.c || true
-          wget https://github.com/culler/macher/releases/download/v1.7/macher
+          wget https://github.com/culler/macher/releases/download/v1.3/macher
          sudo cp macher /usr/local/bin
          sudo chmod a+x /usr/local/bin/macher
          echo "VER_PATH=$(cd tools; pwd)/addVerToFile.tcl" >> $GITHUB_ENV
@@ -83,8 +76,8 @@ jobs:
        working-directory: unix
      - name: Build
        run: |
-          make -j4 tclsh
-          make -j4 shell SCRIPT="$VER_PATH $GITHUB_ENV"
+          make tclsh
+          make shell SCRIPT="$VER_PATH $GITHUB_ENV"
          echo "TCL_BIN=`pwd`/tclsh" >> $GITHUB_ENV
          echo "TCL_ZIP=`pwd`/`echo libtcl*.zip`" >> $GITHUB_ENV
        working-directory: unix
@@ -110,18 +103,11 @@ jobs:
              "Tcl-$TCL_PATCHLEVEL-(snapshot).dmg" \
              "contents/"
        working-directory: 1dist
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Upload
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} macOS single-file build (snapshot)
          path: 1dist/*.dmg
-        id: upload
-    outputs:
-      url: ${{ steps.upload.outputs.artifact-url }}
  win:
    name: Windows
    runs-on: windows-2019
@@ -139,7 +125,7 @@ jobs:
          msystem: UCRT64
          install: git mingw-w64-ucrt-x86_64-toolchain make zip
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
      - name: Prepare
        run: |
          touch generic/tclStubInit.c generic/tclOOStubInit.c
@@ -162,82 +148,8 @@ jobs:
        run: |
          cp ../win/tclsh*.exe tclsh${TCL_PATCHLEVEL}_snapshot.exe
        working-directory: 1dist
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Upload
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Windows single-file build (snapshot)
          path: '1dist/*_snapshot.exe'
-        id: upload
-    outputs:
-      url: ${{ steps.upload.outputs.artifact-url }}
-  combine:
-    needs:
-      - linux
-      - macos
-      - win
-    name: Combine Artifacts (prototype)
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: bash
-    timeout-minutes: 10
-    env:
-      # See also
-      # https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables
-      REMOTE_PATH: ${{ vars.PUBLISH_DROP_PATH }}/data-${{ github.sha }}
-    steps:
-      - name: Make directory
-        run: |
-          mkdir data
-      - name: Get Linux build
-        uses: actions/download-artifact@v4
-        with:
-          path: data
-          # Can't download by artifact ID; stupid missing feature!
-          merge-multiple: true
-      - name: Check data downloaded
-        run: |
-          ls -AlR
-        working-directory: data
-      - name: Transfer built files
-        # https://github.com/marketplace/actions/rsync-deployments-action
-        uses: burnett01/rsync-deployments@7.0.2
-        id: rsync
-        if: false  # Disabled... for now
-        with:
-          # I don't know what the right switches are here, BTW
-          switches: -avzr
-          path: data/
-          remote_path: ${{ env.REMOTE_PATH }}
-          remote_host: ${{ vars.PUBLISH_HOST }}
-          remote_user: ${{ vars.PUBLISH_USER }}
-          remote_key: ${{ secrets.DEPLOY_HOST_KEY }}
-          # MUST be a literal passwordless key
-      - name: Publish files
-        # https://github.com/marketplace/actions/ssh-remote-commands
-        uses: appleboy/ssh-action@v1.2.2
-        id: ssh
-        if: steps.rsync.outcome == 'success'
-        with:
-          host: ${{ vars.PUBLISH_HOST }}
-          username: ${{ vars.PUBLISH_USER }}
-          key: ${{ secrets.DEPLOY_HOST_KEY }}
-          script: |
-            ${{ vars.PUBLISHER_SCRIPT }} ${{ env.REMOTE_PATH }} ${{ github.ref_type }} ${{ github.ref_name }}
-      - name: Report what would be done
-        if: steps.rsync.outcome == 'skipped'
-        env:
-          SWITCHES: -av
-          LOCAL_PATH: data/
-          REMOTE_HOST: ${{ vars.PUBLISH_HOST }}
-          REMOTE_USER: ${{ vars.PUBLISH_USER }}
-          REMOTE_SCRIPT: |
-            ${{ vars.PUBLISHER_SCRIPT }} ${{ env.REMOTE_PATH }} ${{ github.ref_type }} ${{ github.ref_name }}
-        run: |
-          echo "would run: rsync $SWITCHES $LOCAL_PATH $REMOTE_USER@$REMOTE_HOST:$REMOTE_PATH"
-          echo "would run: ssh $REMOTE_USER@$REMOTE_HOST $REMOTE_SCRIPT"
-      # Consider https://github.com/marketplace/actions/slack-notify maybe?
@@ -3,7 +3,8 @@ on:
  push:
    branches:
    - "main"
-    - "core-9-0-branch"
+    - "core-8-branch"
+    - "core-8-6-branch"
    tags:
    - "core-**"
 permissions:
@@ -12,106 +13,62 @@ env:
  ERROR_ON_FAILURES: 1
 jobs:
  msvc:
-    runs-on: windows-2025
+    runs-on: windows-2022
    defaults:
      run:
        shell: powershell
        working-directory: win
    strategy:
      matrix:
-        config:
+        cfgopt:
          - ""
+          - "OPTS=utf16"
          - "CHECKS=nodep"
          - "OPTS=static"
-          - "OPTS=noembed"
          - "OPTS=symbols"
          - "OPTS=symbols STATS=compdbg,memdbg"
    # Using powershell means we need to explicitly stop on failure
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        timeout-minutes: 5
      - name: Init MSVC
        uses: ilammy/msvc-dev-cmd@v1
        timeout-minutes: 5
-      - name: Build ${{ matrix.config }}
+      - name: Build ${{ matrix.cfgopt }}
        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} all
+          &nmake -f makefile.vc ${{ matrix.cfgopt }} all
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
        timeout-minutes: 5
-      - name: Build Test Harness ${{ matrix.config }}
+      - name: Build Test Harness ${{ matrix.cfgopt }}
        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} tcltest
+          &nmake -f makefile.vc ${{ matrix.cfgopt }} tcltest
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
        timeout-minutes: 5
-      - name: Run Tests ${{ matrix.config }}
+      - name: Run Tests ${{ matrix.cfgopt }}
        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} test
-          if ($lastexitcode -ne 0) {
-             throw "nmake exit code: $lastexitcode"
-          }
-        timeout-minutes: 30
-  msvc-arm:
-    runs-on: windows-11-arm
-    defaults:
-      run:
-        shell: powershell
-        working-directory: win
-    strategy:
-      matrix:
-        config:
-          - ""
-          - "CHECKS=nodep"
-          - "OPTS=static"
-          - "OPTS=noembed"
-          - "OPTS=symbols"
-          - "OPTS=symbols STATS=compdbg,memdbg"
-    # Using powershell means we need to explicitly stop on failure
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        timeout-minutes: 5
-      - name: Init MSVC
-        uses: ilammy/msvc-dev-cmd@v1
-        timeout-minutes: 5
-      - name: Build ${{ matrix.config }}
-        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} all
-          if ($lastexitcode -ne 0) {
-             throw "nmake exit code: $lastexitcode"
-          }
-        timeout-minutes: 5
-      - name: Build Test Harness ${{ matrix.config }}
-        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} tcltest
-          if ($lastexitcode -ne 0) {
-             throw "nmake exit code: $lastexitcode"
-          }
-        timeout-minutes: 5
-      - name: Run Tests ${{ matrix.config }}
-        run: |
-          &nmake -f makefile.vc ${{ matrix.config }} test
+          &nmake -f makefile.vc ${{ matrix.cfgopt }} test
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
        timeout-minutes: 30
  gcc:
-    runs-on: windows-2025
+    runs-on: windows-2022
    defaults:
      run:
        shell: msys2 {0}
        working-directory: win
    strategy:
      matrix:
-        config:
+        cfgopt:
          - ""
+          - "CFLAGS=-DTCL_UTF_MAX=3"
          - "CFLAGS=-DTCL_NO_DEPRECATED=1"
          - "--disable-shared"
-          - "--disable-zipfs"
          - "--enable-symbols"
          - "--enable-symbols=mem"
          - "--enable-symbols=all"
@@ -124,29 +81,25 @@ jobs:
          install: git mingw-w64-x86_64-toolchain make
        timeout-minutes: 10
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
        timeout-minutes: 5
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
          mkdir "${HOME}/install dir"
        working-directory: generic
-      - name: Configure ${{ matrix.config }}
+      - name: Configure ${{ matrix.cfgopt }}
        run: |
          ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
        env:
-          CFGOPT: --enable-64bit ${{ matrix.config }}
+          CFGOPT: --enable-64bit ${{ matrix.cfgopt }}
        timeout-minutes: 5
      - name: Build
-        run: make -j4 all
+        run: make all
        timeout-minutes: 5
      - name: Build Test Harness
-        run: make -j4 tcltest
+        run: make tcltest
        timeout-minutes: 5
-      - name: Info
-        run: |
-          ulimit -a || echo 'get limit failed'
-          echo 'puts exe:\t[info nameofexecutable]\nver:\t[info patchlevel]\t[if {![catch tcl::build-info ret]} {set ret}]\nlib:\t[info library]\nplat:\t[lsort -dictionary -stride 2 [array get tcl_platform]]' | make runtest || echo 'get info failed'
      - name: Run Tests
        run: make test
        timeout-minutes: 30
@@ -56,12 +56,10 @@ unix/dltest.marker
 unix/dltest/embtest
 unix/tcl.pc
 unix/tclIndex
-unix/pkgs8/*
 unix/pkgs/*
 win/Debug*
 win/Release*
 win/*.manifest
-win/pkgs8/*
 win/pkgs/*
 win/coffbase.txt
 win/tcl.hpj
@@ -0,0 +1,401 @@
+language: c
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - binutils-mingw-w64-i686
+      - binutils-mingw-w64-x86-64
+      - gcc-mingw-w64
+      - gcc-mingw-w64-base
+      - gcc-mingw-w64-i686
+      - gcc-mingw-w64-x86-64
+      - gcc-multilib
+jobs:
+  include:
+# Testing on Linux GCC
+    - name: "Linux/GCC/Shared"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/GCC/Shared: UTF_MAX=3"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=3"
+    - name: "Linux/GCC/Shared: NO_DEPRECATED"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="CFLAGS=-DTCL_NO_DEPRECATED=1"
+    - name: "Linux/GCC/Static"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - CFGOPT="--disable-shared"
+        - BUILD_DIR=unix
+    - name: "Linux/GCC/Debug"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols"
+    - name: "Linux/GCC/Mem-Debug"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols=mem"
+# Newer/Older versions of GCC
+    - name: "Linux/GCC 10/Shared"
+      os: linux
+      dist: focal
+      compiler: gcc-10
+      addons:
+        apt:
+          packages:
+            - g++-10
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/GCC 5/Shared"
+      os: linux
+      dist: bionic
+      compiler: gcc-5
+      addons:
+        apt:
+          packages:
+            - g++-5
+      env:
+        - BUILD_DIR=unix
+# Testing on Linux Clang
+    - name: "Linux/Clang/Shared"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+    - name: "Linux/Clang/Static"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - CFGOPT="--disable-shared"
+        - BUILD_DIR=unix
+    - name: "Linux/Clang/Debug"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols"
+    - name: "Linux/Clang/Mem-Debug"
+      os: linux
+      dist: focal
+      compiler: clang
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-symbols=mem"
+# Testing on Mac, various styles
+    - name: "macOS/Clang/Xcode 12/Shared"
+      os: osx
+      osx_image: xcode12.2
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: &mactest
+        - make all
+        # The styles=develop avoids some weird problems on OSX
+        - make test styles=develop
+    - name: "macOS/Clang/Xcode 12/Shared/Unix-like"
+      os: osx
+      osx_image: xcode12.2
+      env:
+        - BUILD_DIR=unix
+        - CFGOPT="--enable-dtrace"
+    - name: "macOS/Clang/Xcode 12/Shared/libtommath"
+      os: osx
+      osx_image: xcode12.2
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+      addons:
+        homebrew:
+          packages:
+            - libtommath
+# Newer MacOS versions
+    - name: "macOS/Clang/Xcode 12/Universal Apps/Shared"
+      os: osx
+      osx_image: xcode12u
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+# Older MacOS versions
+    - name: "macOS/Clang/Xcode 11/Shared"
+      os: osx
+      osx_image: xcode11.7
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Clang/Xcode 10/Shared"
+      os: osx
+      osx_image: xcode10.3
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Clang/Xcode 9/Shared"
+      os: osx
+      osx_image: xcode9.4
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+    - name: "macOS/Clang/Xcode 8/Shared"
+      os: osx
+      osx_image: xcode8.3
+      env:
+        - BUILD_DIR=macosx
+      install: []
+      script: *mactest
+# Test with mingw-w64 cross-compile
+# Doesn't run tests because wine is only an imperfect Windows emulation
+    - name: "Linux-cross-Windows/GCC/Shared/no test"
+      os: linux
+      dist: focal
+      compiler: x86_64-w64-mingw32-gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--host=x86_64-w64-mingw32 --enable-64bit"
+      script: &crosstest
+        - make all tcltest
+        # Include a high visibility marker that tests are skipped outright
+        - >
+          echo "`tput setaf 3`SKIPPED TEST: CROSS COMPILING`tput sgr0`"
+# Test with mingw-w64 (32 bit) cross-compile
+# Doesn't run tests because wine is only an imperfect Windows emulation
+    - name: "Linux-cross-Windows-32/GCC/Shared/no test"
+      os: linux
+      dist: focal
+      compiler: i686-w64-mingw32-gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT=--host=i686-w64-mingw32
+      script: *crosstest
+# Test on Windows with MSVC native
+    - name: "Windows/MSVC/Shared"
+      os: windows
+      compiler: cl
+      env: &vcenv
+        - BUILD_DIR=win
+        - VCDIR="/C/Program Files (x86)/Microsoft Visual Studio/2017/BuildTools/VC/Auxiliary/Build"
+      before_install: &vcpreinst
+        - touch generic/tclStubInit.c generic/tclOOStubInit.c generic/tclOOScript.h
+        - PATH="$PATH:$VCDIR"
+        - cd ${BUILD_DIR}
+      install: []
+      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: NO_DEPRECATED"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'CHECKS=nodep' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'CHECKS=nodep' '-f' makefile.vc test
+    - name: "Windows/MSVC/Static"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static' '-f' makefile.vc test
+    - name: "Windows/MSVC/Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=symbols' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=symbols' '-f' makefile.vc test
+    - name: "Windows/MSVC/Mem-Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'STATS=memdbg' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'STATS=memdbg' '-f' makefile.vc test
+# Test on Windows with MSVC native (32-bit)
+    - name: "Windows/MSVC-x86/Shared"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      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: NO_DEPRECATED"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'CHECKS=nodep' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'CHECKS=nodep' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Static"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=static' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=static' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=symbols' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'OPTS=symbols' '-f' makefile.vc test
+    - name: "Windows/MSVC-x86/Mem-Debug"
+      os: windows
+      compiler: cl
+      env: *vcenv
+      before_install: *vcpreinst
+      install: []
+      script:
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'STATS=memdbg' '-f' makefile.vc all tcltest
+        - cmd.exe //C vcvarsall.bat x86 '&&' nmake 'STATS=memdbg' '-f' makefile.vc test
+# Test on Windows with GCC native
+    - name: "Windows/GCC/Shared"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit"
+      before_install: &makepreinst
+        - touch generic/tclStubInit.c generic/tclOOStubInit.c generic/tclOOScript.h
+        - choco install -y make zip
+        - cd ${BUILD_DIR}
+    - name: "Windows/GCC/Shared: UTF_MAX=3"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit CFLAGS=-DTCL_UTF_MAX=3"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Shared: NO_DEPRECATED"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit CFLAGS=-DTCL_NO_DEPRECATED=1"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Static"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --disable-shared"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --enable-symbols"
+      before_install: *makepreinst
+    - name: "Windows/GCC/Mem-Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-64bit --enable-symbols=mem"
+      before_install: *makepreinst
+# Test on Windows with GCC native (32-bit)
+    - name: "Windows/GCC-x86/Shared"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Shared: UTF_MAX=3"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="CFLAGS=-DTCL_UTF_MAX=3"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Shared: NO_DEPRECATED"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="CFLAGS=-DTCL_NO_DEPRECATED=1"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Static"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--disable-shared"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-symbols"
+      before_install: *makepreinst
+    - name: "Windows/GCC-x86/Mem-Debug"
+      os: windows
+      compiler: gcc
+      env:
+        - BUILD_DIR=win
+        - CFGOPT="--enable-symbols=mem"
+      before_install: *makepreinst
+# "make dist" only
+    - name: "Linux: make dist"
+      os: linux
+      dist: focal
+      compiler: gcc
+      env:
+        - BUILD_DIR=unix
+      script:
+        - make dist
+before_install:
+  - touch generic/tclStubInit.c generic/tclOOStubInit.c generic/tclOOScript.h
+  - cd ${BUILD_DIR}
+install:
+  - mkdir "$HOME/install dir"
+  - ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
+before_script:
+  - export ERROR_ON_FAILURES=1
+script:
+  - make all tcltest || echo "Something wrong, maybe a hickup, let's try again"
+  - make test
+  - make install
@@ -1,19 +1,24 @@
 # README:  Tcl

-This is the **Tcl 9.0.2** 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/).

-9.1 (in development, daily build)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/linux-build.yml/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions/workflows/linux-build.yml?query=branch%3Amain)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/win-build.yml/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions/workflows/win-build.yml?query=branch%3Amain)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/mac-build.yml/badge.svg?branch=main)](https://github.com/tcltk/tcl/actions/workflows/mac-build.yml?query=branch%3Amain)
+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>
-9.0 (production release, daily build)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/linux-build.yml/badge.svg?branch=core-9-0-branch)](https://github.com/tcltk/tcl/actions/workflows/linux-build.yml?query=branch%3Acore-9-0-branch)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/win-build.yml/badge.svg?branch=core-9-0-branch)](https://github.com/tcltk/tcl/actions/workflows/win-build.yml?query=branch%3Acore-9-0-branch)
-[![Build Status](https://github.com/tcltk/tcl/actions/workflows/mac-build.yml/badge.svg?branch=core-9-0-branch)](https://github.com/tcltk/tcl/actions/workflows/mac-build.yml?query=branch%3Acore-9-0-branch)
+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)
@@ -1,210 +0,0 @@
-
-The source code for Tcl is managed by fossil.  Tcl developers coordinate all
-changes to the Tcl source code at
-
-> [Tcl Source Code](https://core.tcl-lang.org/tcl/timeline)
-
-Release Tcl 9.0.2 arises from the check-in with tag `core-9-0-2`.
-
-Tcl patch releases have the primary purpose of delivering bug fixes
-to the userbase.
-
-# Bug fixes
- - [Better error-message than "interpreter uses an incompatible stubs mechanism"](https://core.tcl-lang.org/tcl/tktview/fc3509)
- - [$interp eval $lambda] after [eval $lambda] or vice versa fails](https://core.tcl-lang.org/tcl/tktview/98006f)
- - [tcl::mathfunc::isunordered inconsistency with some integer values](https://core.tcl-lang.org/tcl/tktview/67d5f7)
- - [test lseq hangs with -Os](https://core.tcl-lang.org/tcl/tktview/d2a3c5)
- - [exec does not handle app execution aliases on Windows](https://core.tcl-lang.org/tcl/tktview/4f0b57)
- - [auto_execok does not find several built-in cmd commands](https://core.tcl-lang.org/tcl/tktview/4e2c8b)
- - [Panic "Buffer Underflow, BUFFER_PADDING not enough"](https://core.tcl-lang.org/tcl/tktview/73bb42)
- - [MS-VS build system: pckIndex.tcl when building for 9 misses "t" for TCL 8.6 part](https://core.tcl-lang.org/tcl/tktview/a77029)
- - [clock format -locale does not look up locale children if parent locale used first](https://core.tcl-lang.org/tcl/tktview/2c0f49)
- - [Missing libtcl?.?.dll.a in Cygwin](https://core.tcl-lang.org/tcl/tktview/dcedba)
- - [tclEpollNotfy PlatformEventsControl panics if websocket disconnected](https://core.tcl-lang.org/tcl/tktview/010d8f)
- - [Tcl_InitStubs compatibility for 9.1](https://core.tcl-lang.org/tcl/tktview/fd8341)
- - [proc with more than 2**31 variables](https://core.tcl-lang.org/tcl/tktview/92aeb8)
-
-# Incompatibilities
- - No known incompatibilities with the Tcl 9.0.0 public interface.
-
-# Updated bundled packages, libraries, standards, data
- - sqlite3 3.49.1
- - tzdata 2025b
-
-Release Tcl 9.0.1 arises from the check-in with tag `core-9-0-1`.
-
-Tcl patch releases have the primary purpose of delivering bug fixes
-to the userbase.  As the first patch release in the Tcl 9.0.\* series,
-Tcl 9.0.1 also includes a small number of interface changes that complete
-some incomplete features first delivered in Tcl 9.0.0.
-
-# Completed 9.0 Features and Interfaces
- - [TIP 701 - Tcl_FSTildeExpand C API](https://core.tcl-lang.org/tips/doc/trunk/tip/701.md)
- - [TIP 707 - ptrAndSize internal rep in Tcl_Obj](https://core.tcl-lang.org/tips/doc/trunk/tip/707.md)
- - [Size modifiers j, q, z, t not implemented]( https://core.tcl-lang.org/tcl/info/c4f365)
-
-# Bug fixes
- - [regression in tzdata, %z instead of offset TZ-name](https://core.tcl-lang.org/tcl/tktview/2c237b)
- - [Tcl will not start properly if there is an init.tcl file in the current dir](https://core.tcl-lang.org/tcl/tktview/43c94f)
- - [clock scan "24:00", ISO-8601 compatibility](https://core.tcl-lang.org/tcl/tktview/aee9f2)
- - [Temporary folder with file "tcl9registry13.dll" remains after "exit"](https://core.tcl-lang.org/tcl/tktview/6ce3c0)
- - [Wrong result by "lsearch -stride -subindices -inline -all"](https://core.tcl-lang.org/tcl/info/5a1aaa)
- - [TIP 609 - required Tcl_ThreadAlert() skipped with nested event loop](https://core.tcl-lang.org/tcl/info/c7e4c4)
- - [buffer overwrite for non-BMP characters in utf-16](https://core.tcl-lang.org/tcl/tktview/66da4d)
- - [zipfs info on mountpoint of executable returns zero offset in field 4"](https://core.tcl-lang.org/tcl/info/aaa84f)
- - [zlib-8.8, zlib-8.16 fail on Fedora 40, gcc 14.1.1](https://core.tcl-lang.org/tcl/tktview/73d5cb)
- - [install registry and dde in $INSTALL_DIR\lib always](https://core.tcl-lang.org/tcl/tktview/364bd9)
- - [cannot build .chm help file (Windows)](https://core.tcl-lang.org/tcl/tktview/bb110c)
-
-# Incompatibilities
- - No known incompatibilities with the Tcl 9.0.0 public interface.
-
-# Updated bundled packages, libraries, standards, data
- - Itcl 4.3.2
- - sqlite3 3.47.2
- - Thread 3.0.1
- - TDBC\* 1.1.10
- - tcltest 2.5.9
- - tzdata 2024b, corrected
-
-Release Tcl 9.0.0 arises from the check-in with tag `core-9-0-0`.
-
-Highlighted differences between Tcl 9.0 and Tcl 8.6 are summarized below,
-with focus on changes important to programmers using the Tcl library and
-writing Tcl scripts.
-
-# Major Features
-
-## 64-bit capacity: Data values larger than 2Gb
- - Strings can be any length (that fits in your available memory)
- - Lists and dictionaries can have very large numbers of elements
-
-## Internationalization of text
- - Full Unicode range of codepoints
- - New encodings: `utf-16`/`utf-32`/`ucs-2`(`le`|`be`), `CESU-8`, etc.
- - `encoding` options `-profile`, `-failindex` manage encoding of I/O.
- - `msgcat` supports custom locale search list
- - `source` defaults to `-encoding utf-8`
-
-## Zip filesystems and attached archives.
- - Packaging of the Tcl script library with the Tcl binary library,
-   meaning that the `TCL_LIBRARY` environment variable is usually not required.
- - Packaging of an application into a virtual filesystem is now a supported
-   core Tcl feature.
-
-## Unix notifiers available using `epoll()` or `kqueue()`
- - This relieves limits on file descriptors imposed by legacy `select()` and fixes a performance bottleneck.
-
-# Incompatibilities
-
-## Notable incompatibilities
- - Unqualified varnames resolved in current namespace, not global.
-   Note that in almost all cases where this causes a change, the change is actually the removal of a latent bug.
- - No `--disable-threads` build option.  Always thread-enabled.
- - I/O malencoding default response: raise error (`-profile strict`)
- - Windows platform needs Windows 7 or Windows Server 2008 R2 or later
- - Ended interpretation of `~` as home directory in pathnames.
-   (See `file home` and `file tildeexpand` for replacements when you need them.)
- - Removed the `identity` encoding.
-   (There were only ever very few valid use cases for this; almost all uses
-   were systematically wrong.)
- - Removed the encoding alias `binary` to `iso8859-1`.
- - `$::tcl_precision` no longer controls string generation of doubles.
-   (If you need a particular precision, use `format`.)
- - Removed pre-Tcl 8 legacies: `case`, `puts` and `read` variant syntaxes.
- - Removed subcommands [`trace variable`|`vdelete`|`vinfo`]
- - Removed `-eofchar` option for write channels.
- - On Windows 10+ (Version 1903 or higher), system encoding is always utf-8.
- - `%b`/`%d`/`%o`/`%x` format modifiers (without size modifier) for `format`
-   and `scan` always truncate to 32-bits on all platforms.
- - `%L` size modifier for `scan` no longer truncates to 64-bit.
- - Removed command `::tcl::unsupported::inject`.
-   (See `coroinject` and `coroprobe` for supported commands with significantly
-   more comprehensible semantics.)
-
-## Incompatibilities in C public interface
- - Extensions built against Tcl 8.6 and before will not work with Tcl 9.0;
-   ABI compatibility was a non-goal for 9.0.  In _most_ cases, rebuilding
-   against Tcl 9.0 should work except when a removed API function is used.
- - Many arguments expanded type from `int` to `Tcl_Size`, a signed integer type
-   large enough to support 64-bit sized memory objects.
-   The constant `TCL_AUTO_LENGTH` is a value of that type that indicates that
-   the length should be obtained using an appropriate function (typically `strlen()` for `char *` values).
- - Ended support for `Tcl_ChannelTypeVersion` less than 5
- - Introduced versioning of the `Tcl_ObjType` struct
- - Removed macros `CONST*`: Tcl 9 support means dropping Tcl 8.3 support.
-   (Replaced with standard C `const` keyword going forward.)
- - Removed registration of several `Tcl_ObjType`s.
- - Removed API functions:
-
-     `Tcl_Backslash()`,
-     `Tcl_*VA()`,
-     `Tcl_*MathFunc*()`,
-     `Tcl_MakeSafe()`,
-     `Tcl_(Save|Restore|Discard|Free)Result()`,
-     `Tcl_EvalTokens()`,
-     `Tcl_(Get|Set)DefaultEncodingDir()`,
-     `Tcl_UniCharN(case)cmp()`,
-     `Tcl_UniCharCaseMatch()`
-
- - Revised many internals; beware reliance on undocumented behaviors.
-
-# New Features
-
-## New commands
- - `array default` — Specify default values for arrays (note that this alters the behaviour of `append`, `incr`, `lappend`).
- - `array for` — Cheap iteration over an array's contents.
- - `chan isbinary` — Test if a channel is configured to work with binary data.
- - `coroinject`, `coroprobe` — Interact with paused coroutines.
- - `clock add weekdays` — Clock arithmetic with week days.
- - `const`, `info const*` — Commands for defining constants (variables that can't be modified).
- - `dict getwithdefault` — Define a fallback value to use when `dict get` would otherwise fail.
- - `file home` — Get the user home directory.
- - `file tempdir` — Create a temporary directory.
- - `file tildeexpand` — Expand a file path containing a `~`.
- - `info commandtype` — Introspection for the kinds of commands.
- - `ledit` — Equivalent to `lreplace` but on a list in a variable.
- - `lpop` — Remove an item from a list in a variable.
- - `lremove` — Remove a sublist from a list in a variable.
- - `lseq` — Generate a list of numbers in a sequence.
- - `package files` — Describe the contents of a package.
- - `string insert` — Insert a string as a substring of another string.
- - `string is dict` — Test whether a string is a dictionary.
- - `tcl::process` — Commands for working with subprocesses.
- - `*::build-info` — Obtain information about the build of Tcl.
- - `readFile`, `writeFile`, `foreachLine` — Simple procedures for basic working with files.
- - `tcl::idna::*` — Commands for working with encoded DNS names.
-
-## New command options
- - `chan configure ... -inputmode ...` — Support for raw terminal input and reading passwords.
- - `clock scan ... -validate ...`
- - `info loaded ... ?prefix?`
- - `lsearch ... -stride ...` — Search a list by groups of items.
- - `regsub ... -command ...` — Generate the replacement for a regular expression by calling a command.
- - `socket ... -nodelay ... -keepalive ...`
- - `vwait` controlled by several new options
- - `expr` string comparators `lt`, `gt`, `le`, `ge`
- - `expr` supports comments inside expressions
-
-## Numbers
- - <code>0<i>NNN</i></code> format is no longer octal interpretation. Use <code>0o<i>NNN</i></code>.
- - <code>0d<i>NNNN</i></code> format to compel decimal interpretation.
- - <code>NN_NNN_NNN</code>, underscores in numbers for optional readability
- - Functions: `isinf()`, `isnan()`, `isnormal()`, `issubnormal()`, `isunordered()`
- - Command: `fpclassify`
- - Function `int()` no longer truncates to word size
-
-## TclOO facilities
- - private variables and methods
- - class variables and methods
- - abstract and singleton classes
- - configurable properties
- - `method -export`, `method -unexport`
-
-# Known bugs
- - [changed behaviour wrt command names, namespaces and resolution](https://core.tcl-lang.org/tcl/tktview/f14b33)
- - [windows dos device paths inconsistencies and missing functionality](https://core.tcl-lang.org/tcl/tktview/d8f121)
- - [load library (dll) from zipfs-library causes a leak in temporary folder](https://core.tcl-lang.org/tcl/tktview/a8e4f7)
- - [lsearch -sorted -inline -subindices incorrect result](https://core.tcl-lang.org/tcl/tktview/bc4ac0)
- - ["No error" when load fails due to a missing secondary DLL](https://core.tcl-lang.org/tcl/tktview/bc4ac0)
-
@@ -43,32 +43,32 @@ TCL_DECLARE_MUTEX(netdbMutex)
 static size_t
 strlcpy(char *dst, const char *src, size_t siz)
 {
-	char *d = dst;
-	const char *s = src;
-	size_t n = siz;
+        char *d = dst;
+        const char *s = src;
+        size_t n = siz;

-	/* Copy as many bytes as will fit */
-	if (n != 0 && --n != 0) {
-		do {
-			if ((*d++ = *s++) == 0)
-				break;
-		} while (--n != 0);
-	}
+        /* Copy as many bytes as will fit */
+        if (n != 0 && --n != 0) {
+                do {
+                        if ((*d++ = *s++) == 0)
+                                break;
+                } while (--n != 0);
+        }

-	/* Not enough room in dst, add NUL and traverse rest of src */
-	if (n == 0) {
-		if (siz != 0)
-			*d = '\0';	      /* NUL-terminate dst */
-		while (*s++)
-			;
-	}
+        /* Not enough room in dst, add NUL and traverse rest of src */
+        if (n == 0) {
+                if (siz != 0)
+                        *d = '\0';              /* NUL-terminate dst */
+                while (*s++)
+                        ;
+        }

-	return(s - src - 1);    /* count does not include NUL */
+        return(s - src - 1);    /* count does not include NUL */
 }
 #endif

 int fake_getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
-	size_t hostlen, char *serv, size_t servlen, int flags)
+                size_t hostlen, char *serv, size_t servlen, int flags)
 {
 	struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 	struct hostent *hp;
@@ -0,0 +1,53 @@
+/*
+ * string.h --
+ *
+ *	Declarations of ANSI C library procedures for string handling.
+ *
+ * Copyright (c) 1991-1993 The Regents of the University of California.
+ * Copyright (c) 1994-1996 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _STRING
+#define _STRING
+
+/*
+ * The following #include is needed to define size_t. (This used to include
+ * sys/stdtypes.h but that doesn't exist on older versions of SunOS, e.g.
+ * 4.0.2, so I'm trying sys/types.h now.... hopefully it exists everywhere)
+ */
+
+#include <sys/types.h>
+
+extern void *		memchr(const void *s, int c, size_t n);
+extern int		memcmp(const void *s1, const void *s2, size_t n);
+extern void *		memcpy(void *t, const void *f, size_t n);
+#ifdef NO_MEMMOVE
+#define memmove(d,s,n)	(bcopy((s), (d), (n)))
+#else
+extern char *		memmove(void *t, const void *f, size_t n);
+#endif
+extern void *		memset(void *s, int c, size_t n);
+
+extern int		strcasecmp(const char *s1, const char *s2);
+extern char *		strcat(char *dst, const char *src);
+extern char *		strchr(const char *string, int c);
+extern int		strcmp(const char *s1, const char *s2);
+extern char *		strcpy(char *dst, const char *src);
+extern size_t		strcspn(const char *string, const char *chars);
+extern char *		strdup(const char *string);
+extern char *		strerror(int error);
+extern size_t		strlen(const char *string);
+extern int		strncasecmp(const char *s1, const char *s2, size_t n);
+extern char *		strncat(char *dst, const char *src, size_t numChars);
+extern int		strncmp(const char *s1, const char *s2, size_t nChars);
+extern char *		strncpy(char *dst, const char *src, size_t numChars);
+extern char *		strpbrk(const char *string, const char *chars);
+extern char *		strrchr(const char *string, int c);
+extern size_t		strspn(const char *string, const char *chars);
+extern char *		strstr(const char *string, const char *substring);
+extern char *		strtok(char *s, const char *delim);
+
+#endif /* _STRING */
@@ -3,9 +3,7 @@ set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)

 project(zlib C)

-set(VERSION "1.3.1")
-
-option(ZLIB_BUILD_EXAMPLES "Enable Zlib Examples" ON)
+set(VERSION "1.3")

 set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
 set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
@@ -150,9 +148,7 @@ if(MINGW)
 endif(MINGW)

 add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
-target_include_directories(zlib PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
 add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
-target_include_directories(zlibstatic PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
 set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
 set_target_properties(zlib PROPERTIES SOVERSION 1)

@@ -170,7 +166,7 @@ endif()
 if(UNIX)
    # On unix-like platforms the library is almost always called libz
   set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
-   if(NOT APPLE AND NOT(CMAKE_SYSTEM_NAME STREQUAL AIX))
+   if(NOT APPLE)
     set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
   endif()
 elseif(BUILD_SHARED_LIBS AND WIN32)
@@ -197,22 +193,21 @@ endif()
 #============================================================================
 # Example binaries
 #============================================================================
-if(ZLIB_BUILD_EXAMPLES)
-    add_executable(example test/example.c)
-    target_link_libraries(example zlib)
-    add_test(example example)

-    add_executable(minigzip test/minigzip.c)
-    target_link_libraries(minigzip zlib)
+add_executable(example test/example.c)
+target_link_libraries(example zlib)
+add_test(example example)

-    if(HAVE_OFF64_T)
-        add_executable(example64 test/example.c)
-        target_link_libraries(example64 zlib)
-        set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
-        add_test(example64 example64)
+add_executable(minigzip test/minigzip.c)
+target_link_libraries(minigzip zlib)

-        add_executable(minigzip64 test/minigzip.c)
-        target_link_libraries(minigzip64 zlib)
-        set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
-    endif()
+if(HAVE_OFF64_T)
+    add_executable(example64 test/example.c)
+    target_link_libraries(example64 zlib)
+    set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
+    add_test(example64 example64)
+
+    add_executable(minigzip64 test/minigzip.c)
+    target_link_libraries(minigzip64 zlib)
+    set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
 endif()
@@ -1,16 +1,6 @@

                ChangeLog file for zlib

-Changes in 1.3.1 (22 Jan 2024)
- Reject overflows of zip header fields in minizip
- Fix bug in inflateSync() for data held in bit buffer
- Add LIT_MEM define to use more memory for a small deflate speedup
- Fix decision on the emission of Zip64 end records in minizip
- Add bounds checking to ERR_MSG() macro, used by zError()
- Neutralize zip file traversal attacks in miniunz
- Fix a bug in ZLIB_DEBUG compiles in check_match()
- Various portability and appearance improvements
-
 Changes in 1.3 (18 Aug 2023)
 - Remove K&R function definitions and zlib2ansi
 - Fix bug in deflateBound() for level 0 and memLevel 9
@@ -14,7 +14,8 @@ The latest zlib FAQ is at http://zlib.net/zlib_faq.html
 2. Where can I get a Windows DLL version?

    The zlib sources can be compiled without change to produce a DLL.  See the
-    file win32/DLL_FAQ.txt in the zlib distribution.
+    file win32/DLL_FAQ.txt in the zlib distribution.  Pointers to the
+    precompiled DLL are found in the zlib web site at http://zlib.net/ .

 3. Where can I get a Visual Basic interface to zlib?

@@ -1,22 +0,0 @@
-Copyright notice:
-
- (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
-  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.
-
-  Jean-loup Gailly        Mark Adler
-  jloup@gzip.org          madler@alumni.caltech.edu
@@ -1,5 +1,5 @@
 # Makefile for zlib
-# Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+# Copyright (C) 1995-2017 Jean-loup Gailly, Mark Adler
 # For conditions of distribution and use, see copyright notice in zlib.h

 # To compile and test, type:
@@ -22,13 +22,13 @@ CFLAGS=-O

 SFLAGS=-O
 LDFLAGS=
-TEST_LIBS=-L. libz.a
+TEST_LDFLAGS=$(LDFLAGS) -L. libz.a
 LDSHARED=$(CC)
 CPP=$(CC) -E

 STATICLIB=libz.a
 SHAREDLIB=libz.so
-SHAREDLIBV=libz.so.1.3.1
+SHAREDLIBV=libz.so.1.3
 SHAREDLIBM=libz.so.1
 LIBS=$(STATICLIB) $(SHAREDLIBV)

@@ -282,10 +282,10 @@ placebo $(SHAREDLIBV): $(PIC_OBJS) libz.a
 	-@rmdir objs

 example$(EXE): example.o $(STATICLIB)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ example.o $(TEST_LIBS)
+	$(CC) $(CFLAGS) -o $@ example.o $(TEST_LDFLAGS)

 minigzip$(EXE): minigzip.o $(STATICLIB)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ minigzip.o $(TEST_LIBS)
+	$(CC) $(CFLAGS) -o $@ minigzip.o $(TEST_LDFLAGS)

 examplesh$(EXE): example.o $(SHAREDLIBV)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS) -L. $(SHAREDLIBV)
@@ -294,10 +294,10 @@ minigzipsh$(EXE): minigzip.o $(SHAREDLIBV)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS) -L. $(SHAREDLIBV)

 example64$(EXE): example64.o $(STATICLIB)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ example64.o $(TEST_LIBS)
+	$(CC) $(CFLAGS) -o $@ example64.o $(TEST_LDFLAGS)

 minigzip64$(EXE): minigzip64.o $(STATICLIB)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ minigzip64.o $(TEST_LIBS)
+	$(CC) $(CFLAGS) -o $@ minigzip64.o $(TEST_LDFLAGS)

 install-libs: $(LIBS)
 	-@if [ ! -d $(DESTDIR)$(exec_prefix)  ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
@@ -360,7 +360,7 @@ zconf: $(SRCDIR)zconf.h.in
 	cp -p $(SRCDIR)zconf.h.in zconf.h

 minizip-test: static
-	cd contrib/minizip && { CC="$(CC)" CFLAGS="$(CFLAGS)" $(MAKE) test ; cd ../.. ; }
+	cd contrib/minizip && { CFLAGS="$(CFLAGS)" $(MAKE) test ; cd ../.. ; }

 minizip-clean:
 	cd contrib/minizip && { $(MAKE) clean ; cd ../.. ; }
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.3.1 is a general purpose data compression library.  All the code is
+zlib 1.3 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
 https://marknelson.us/posts/1997/01/01/zlib-engine.html .

-The changes made in version 1.3.1 are documented in the file ChangeLog.
+The changes made in version 1.3 are documented in the file ChangeLog.

 Unsupported third party contributions are provided in directory contrib/ .

@@ -83,7 +83,7 @@ Acknowledgments:

 Copyright notice:

- (C) 1995-2024 Jean-loup Gailly and Mark Adler
+ (C) 1995-2023 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
@@ -25,7 +25,7 @@ if test $SRCDIR = "."; then
    ZINCOUT="-I."
    SRCDIR=""
 else
-    ZINC='-I. -include zconf.h'
+    ZINC='-include zconf.h'
    ZINCOUT='-I. -I$(SRCDIR)'
    SRCDIR="$SRCDIR/"
 fi
@@ -44,8 +44,7 @@ STATICLIB=libz.a

 # extract zlib version numbers from zlib.h
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}zlib.h`
-VER3=`echo ${VER}|sed -n -e 's/\([0-9]\{1,\}\(\\.[0-9]\{1,\}\)\{1,2\}\).*/\1/p'`
-VER1=`echo ${VER}|sed -n -e 's/\([0-9]\{1,\}\)\\..*/\1/p'`
+VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < ${SRCDIR}zlib.h`

 # establish commands for library building
 if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
@@ -264,7 +263,7 @@ if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
        SHAREDLIB=libz$shared_ext
        SHAREDLIBV=libz.$VER$shared_ext
        SHAREDLIBM=libz.$VER1$shared_ext
-        LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"}
+        LDSHARED=${LDSHARED-"$cc -dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER"}
        if "${CROSS_PREFIX}libtool" -V 2>&1 | grep Apple > /dev/null; then
            AR="${CROSS_PREFIX}libtool"
        elif libtool -V 2>&1 | grep Apple > /dev/null; then
@@ -442,7 +441,7 @@ EOF
 if test $shared -eq 1; then
  echo Checking for shared library support... | tee -a configure.log
  # we must test in two steps (cc then ld), required at least on SunOS 4.x
-  if try $CC -c $SFLAGS $test.c &&
+  if try $CC -w -c $SFLAGS $test.c &&
     try $LDSHARED $SFLAGS -o $test$shared_ext $test.o; then
    echo Building shared library $SHAREDLIBV with $CC. | tee -a configure.log
  elif test -z "$old_cc" -a -z "$old_cflags"; then
@@ -152,7 +152,7 @@ procedure DecompressToUserBuf(const InBuf: Pointer; InBytes: Integer;
  const OutBuf: Pointer; BufSize: Integer);

 const
-  zlib_version = '1.3.1';
+  zlib_version = '1.3.0';

 type
  EZlibError = class(Exception);
@@ -1,202 +1,202 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.Runtime.InteropServices;
-using System.Text;
-
-
-namespace DotZLib
-{
-    #region ChecksumGeneratorBase
-    /// <summary>
-    /// Implements the common functionality needed for all <see cref="ChecksumGenerator"/>s
-    /// </summary>
-    /// <example></example>
-    public abstract class ChecksumGeneratorBase : ChecksumGenerator
-    {
-        /// <summary>
-        /// The value of the current checksum
-        /// </summary>
-        protected uint _current;
-
-        /// <summary>
-        /// Initializes a new instance of the checksum generator base - the current checksum is
-        /// set to zero
-        /// </summary>
-        public ChecksumGeneratorBase()
-        {
-            _current = 0;
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the checksum generator base with a specified value
-        /// </summary>
-        /// <param name="initialValue">The value to set the current checksum to</param>
-        public ChecksumGeneratorBase(uint initialValue)
-        {
-            _current = initialValue;
-        }
-
-        /// <summary>
-        /// Resets the current checksum to zero
-        /// </summary>
-        public void Reset() { _current = 0; }
-
-        /// <summary>
-        /// Gets the current checksum value
-        /// </summary>
-        public uint Value { get { return _current; } }
-
-        /// <summary>
-        /// Updates the current checksum with part of an array of bytes
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        /// <param name="offset">Where in <c>data</c> to start updating</param>
-        /// <param name="count">The number of bytes from <c>data</c> to use</param>
-        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
-        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
-        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
-        /// <remarks>All the other <c>Update</c> methods are implemented in terms of this one.
-        /// This is therefore the only method a derived class has to implement</remarks>
-        public abstract void Update(byte[] data, int offset, int count);
-
-        /// <summary>
-        /// Updates the current checksum with an array of bytes.
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        public void Update(byte[] data)
-        {
-            Update(data, 0, data.Length);
-        }
-
-        /// <summary>
-        /// Updates the current checksum with the data from a string
-        /// </summary>
-        /// <param name="data">The string to update the checksum with</param>
-        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
-        public void Update(string data)
-        {
-			Update(Encoding.UTF8.GetBytes(data));
-        }
-
-        /// <summary>
-        /// Updates the current checksum with the data from a string, using a specific encoding
-        /// </summary>
-        /// <param name="data">The string to update the checksum with</param>
-        /// <param name="encoding">The encoding to use</param>
-        public void Update(string data, Encoding encoding)
-        {
-            Update(encoding.GetBytes(data));
-        }
-
-    }
-    #endregion
-
-    #region CRC32
-    /// <summary>
-    /// Implements a CRC32 checksum generator
-    /// </summary>
-    public sealed class CRC32Checksum : ChecksumGeneratorBase
-    {
-        #region DLL imports
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern uint crc32(uint crc, int data, uint length);
-
-        #endregion
-
-        /// <summary>
-        /// Initializes a new instance of the CRC32 checksum generator
-        /// </summary>
-        public CRC32Checksum() : base() {}
-
-        /// <summary>
-        /// Initializes a new instance of the CRC32 checksum generator with a specified value
-        /// </summary>
-        /// <param name="initialValue">The value to set the current checksum to</param>
-        public CRC32Checksum(uint initialValue) : base(initialValue) {}
-
-        /// <summary>
-        /// Updates the current checksum with part of an array of bytes
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        /// <param name="offset">Where in <c>data</c> to start updating</param>
-        /// <param name="count">The number of bytes from <c>data</c> to use</param>
-        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
-        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
-        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
-        public override void Update(byte[] data, int offset, int count)
-        {
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > data.Length) throw new ArgumentException();
-            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
-            try
-            {
-                _current = crc32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
-            }
-            finally
-            {
-                hData.Free();
-            }
-        }
-
-    }
-    #endregion
-
-    #region Adler
-    /// <summary>
-    /// Implements a checksum generator that computes the Adler checksum on data
-    /// </summary>
-    public sealed class AdlerChecksum : ChecksumGeneratorBase
-    {
-        #region DLL imports
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern uint adler32(uint adler, int data, uint length);
-
-        #endregion
-
-        /// <summary>
-        /// Initializes a new instance of the Adler checksum generator
-        /// </summary>
-        public AdlerChecksum() : base() {}
-
-        /// <summary>
-        /// Initializes a new instance of the Adler checksum generator with a specified value
-        /// </summary>
-        /// <param name="initialValue">The value to set the current checksum to</param>
-        public AdlerChecksum(uint initialValue) : base(initialValue) {}
-
-        /// <summary>
-        /// Updates the current checksum with part of an array of bytes
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        /// <param name="offset">Where in <c>data</c> to start updating</param>
-        /// <param name="count">The number of bytes from <c>data</c> to use</param>
-        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
-        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
-        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
-        public override void Update(byte[] data, int offset, int count)
-        {
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > data.Length) throw new ArgumentException();
-            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
-            try
-            {
-                _current = adler32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
-            }
-            finally
-            {
-                hData.Free();
-            }
-        }
-
-    }
-    #endregion
-
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+
+namespace DotZLib
+{
+    #region ChecksumGeneratorBase
+    /// <summary>
+    /// Implements the common functionality needed for all <see cref="ChecksumGenerator"/>s
+    /// </summary>
+    /// <example></example>
+    public abstract class ChecksumGeneratorBase : ChecksumGenerator
+    {
+        /// <summary>
+        /// The value of the current checksum
+        /// </summary>
+        protected uint _current;
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator base - the current checksum is
+        /// set to zero
+        /// </summary>
+        public ChecksumGeneratorBase()
+        {
+            _current = 0;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the checksum generator basewith a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public ChecksumGeneratorBase(uint initialValue)
+        {
+            _current = initialValue;
+        }
+
+        /// <summary>
+        /// Resets the current checksum to zero
+        /// </summary>
+        public void Reset() { _current = 0; }
+
+        /// <summary>
+        /// Gets the current checksum value
+        /// </summary>
+        public uint Value { get { return _current; } }
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        /// <remarks>All the other <c>Update</c> methods are implemented in terms of this one.
+        /// This is therefore the only method a derived class has to implement</remarks>
+        public abstract void Update(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Updates the current checksum with an array of bytes.
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        public void Update(byte[] data)
+        {
+            Update(data, 0, data.Length);
+        }
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
+        public void Update(string data)
+        {
+			Update(Encoding.UTF8.GetBytes(data));
+        }
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string, using a specific encoding
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <param name="encoding">The encoding to use</param>
+        public void Update(string data, Encoding encoding)
+        {
+            Update(encoding.GetBytes(data));
+        }
+
+    }
+    #endregion
+
+    #region CRC32
+    /// <summary>
+    /// Implements a CRC32 checksum generator
+    /// </summary>
+    public sealed class CRC32Checksum : ChecksumGeneratorBase
+    {
+        #region DLL imports
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint crc32(uint crc, int data, uint length);
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator
+        /// </summary>
+        public CRC32Checksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the CRC32 checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public CRC32Checksum(uint initialValue) : base(initialValue) {}
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        public override void Update(byte[] data, int offset, int count)
+        {
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
+            try
+            {
+                _current = crc32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
+            }
+            finally
+            {
+                hData.Free();
+            }
+        }
+
+    }
+    #endregion
+
+    #region Adler
+    /// <summary>
+    /// Implements a checksum generator that computes the Adler checksum on data
+    /// </summary>
+    public sealed class AdlerChecksum : ChecksumGeneratorBase
+    {
+        #region DLL imports
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint adler32(uint adler, int data, uint length);
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator
+        /// </summary>
+        public AdlerChecksum() : base() {}
+
+        /// <summary>
+        /// Initializes a new instance of the Adler checksum generator with a specified value
+        /// </summary>
+        /// <param name="initialValue">The value to set the current checksum to</param>
+        public AdlerChecksum(uint initialValue) : base(initialValue) {}
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="NullReferenceException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        public override void Update(byte[] data, int offset, int count)
+        {
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+            GCHandle hData = GCHandle.Alloc(data, GCHandleType.Pinned);
+            try
+            {
+                _current = adler32(_current, hData.AddrOfPinnedObject().ToInt32()+offset, (uint)count);
+            }
+            finally
+            {
+                hData.Free();
+            }
+        }
+
+    }
+    #endregion
+
 }
@@ -1,83 +1,83 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.Diagnostics;
-
-namespace DotZLib
-{
-
-	/// <summary>
-	/// This class implements a circular buffer
-	/// </summary>
-	internal class CircularBuffer
-	{
-        #region Private data
-        private int _capacity;
-        private int _head;
-        private int _tail;
-        private int _size;
-        private byte[] _buffer;
-        #endregion
-
-        public CircularBuffer(int capacity)
-        {
-            Debug.Assert( capacity > 0 );
-            _buffer = new byte[capacity];
-            _capacity = capacity;
-            _head = 0;
-            _tail = 0;
-            _size = 0;
-        }
-
-        public int Size { get { return _size; } }
-
-        public int Put(byte[] source, int offset, int count)
-        {
-            Debug.Assert( count > 0 );
-            int trueCount = Math.Min(count, _capacity - Size);
-            for (int i = 0; i < trueCount; ++i)
-                _buffer[(_tail+i) % _capacity] = source[offset+i];
-            _tail += trueCount;
-            _tail %= _capacity;
-            _size += trueCount;
-            return trueCount;
-        }
-
-        public bool Put(byte b)
-        {
-            if (Size == _capacity) // no room
-                return false;
-            _buffer[_tail++] = b;
-            _tail %= _capacity;
-            ++_size;
-            return true;
-        }
-
-        public int Get(byte[] destination, int offset, int count)
-        {
-            int trueCount = Math.Min(count,Size);
-            for (int i = 0; i < trueCount; ++i)
-                destination[offset + i] = _buffer[(_head+i) % _capacity];
-            _head += trueCount;
-            _head %= _capacity;
-            _size -= trueCount;
-            return trueCount;
-        }
-
-        public int Get()
-        {
-            if (Size == 0)
-                return -1;
-
-            int result = (int)_buffer[_head++ % _capacity];
-            --_size;
-            return result;
-        }
-
-    }
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+
+namespace DotZLib
+{
+
+	/// <summary>
+	/// This class implements a circular buffer
+	/// </summary>
+	internal class CircularBuffer
+	{
+        #region Private data
+        private int _capacity;
+        private int _head;
+        private int _tail;
+        private int _size;
+        private byte[] _buffer;
+        #endregion
+
+        public CircularBuffer(int capacity)
+        {
+            Debug.Assert( capacity > 0 );
+            _buffer = new byte[capacity];
+            _capacity = capacity;
+            _head = 0;
+            _tail = 0;
+            _size = 0;
+        }
+
+        public int Size { get { return _size; } }
+
+        public int Put(byte[] source, int offset, int count)
+        {
+            Debug.Assert( count > 0 );
+            int trueCount = Math.Min(count, _capacity - Size);
+            for (int i = 0; i < trueCount; ++i)
+                _buffer[(_tail+i) % _capacity] = source[offset+i];
+            _tail += trueCount;
+            _tail %= _capacity;
+            _size += trueCount;
+            return trueCount;
+        }
+
+        public bool Put(byte b)
+        {
+            if (Size == _capacity) // no room
+                return false;
+            _buffer[_tail++] = b;
+            _tail %= _capacity;
+            ++_size;
+            return true;
+        }
+
+        public int Get(byte[] destination, int offset, int count)
+        {
+            int trueCount = Math.Min(count,Size);
+            for (int i = 0; i < trueCount; ++i)
+                destination[offset + i] = _buffer[(_head+i) % _capacity];
+            _head += trueCount;
+            _head %= _capacity;
+            _size -= trueCount;
+            return trueCount;
+        }
+
+        public int Get()
+        {
+            if (Size == 0)
+                return -1;
+
+            int result = (int)_buffer[_head++ % _capacity];
+            --_size;
+            return result;
+        }
+
+    }
+}
@@ -1,198 +1,198 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.Runtime.InteropServices;
-
-namespace DotZLib
-{
-	/// <summary>
-	/// Implements the common functionality needed for all <see cref="Codec"/>s
-	/// </summary>
-	public abstract class CodecBase : Codec, IDisposable
-	{
-
-        #region Data members
-
-        /// <summary>
-        /// Instance of the internal zlib buffer structure that is
-        /// passed to all functions in the zlib dll
-        /// </summary>
-        internal ZStream _ztream = new ZStream();
-
-        /// <summary>
-        /// True if the object instance has been disposed, false otherwise
-        /// </summary>
-        protected bool _isDisposed = false;
-
-        /// <summary>
-        /// The size of the internal buffers
-        /// </summary>
-        protected const int kBufferSize = 16384;
-
-        private byte[] _outBuffer = new byte[kBufferSize];
-        private byte[] _inBuffer = new byte[kBufferSize];
-
-        private GCHandle _hInput;
-        private GCHandle _hOutput;
-
-        private uint _checksum = 0;
-
-        #endregion
-
-        /// <summary>
-        /// Initializes a new instance of the <c>CodeBase</c> class.
-        /// </summary>
-		public CodecBase()
-		{
-            try
-            {
-                _hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned);
-                _hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned);
-            }
-            catch (Exception)
-            {
-                CleanUp(false);
-                throw;
-            }
-        }
-
-
-        #region Codec Members
-
-        /// <summary>
-        /// Occurs when more processed data are available.
-        /// </summary>
-        public event DataAvailableHandler DataAvailable;
-
-        /// <summary>
-        /// Fires the <see cref="DataAvailable"/> event
-        /// </summary>
-        protected void OnDataAvailable()
-        {
-            if (_ztream.total_out > 0)
-            {
-                if (DataAvailable != null)
-                    DataAvailable( _outBuffer, 0, (int)_ztream.total_out);
-                resetOutput();
-            }
-        }
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        public void Add(byte[] data)
-        {
-            Add(data,0,data.Length);
-        }
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
-        /// <param name="count">The number of bytes to add</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        /// <remarks>This must be implemented by a derived class</remarks>
-        public abstract void Add(byte[] data, int offset, int count);
-
-        /// <summary>
-        /// Finishes up any pending data that needs to be processed and handled.
-        /// </summary>
-        /// <remarks>This must be implemented by a derived class</remarks>
-        public abstract void Finish();
-
-        /// <summary>
-        /// Gets the checksum of the data that has been added so far
-        /// </summary>
-        public uint Checksum { get { return _checksum; } }
-
-        #endregion
-
-        #region Destructor & IDisposable stuff
-
-        /// <summary>
-        /// Destroys this instance
-        /// </summary>
-        ~CodecBase()
-        {
-            CleanUp(false);
-        }
-
-        /// <summary>
-        /// Releases any unmanaged resources and calls the <see cref="CleanUp()"/> method of the derived class
-        /// </summary>
-        public void Dispose()
-        {
-            CleanUp(true);
-        }
-
-        /// <summary>
-        /// Performs any codec specific cleanup
-        /// </summary>
-        /// <remarks>This must be implemented by a derived class</remarks>
-        protected abstract void CleanUp();
-
-        // performs the release of the handles and calls the derived CleanUp()
-        private void CleanUp(bool isDisposing)
-        {
-            if (!_isDisposed)
-            {
-                CleanUp();
-                if (_hInput.IsAllocated)
-                    _hInput.Free();
-                if (_hOutput.IsAllocated)
-                    _hOutput.Free();
-
-                _isDisposed = true;
-            }
-        }
-
-
-        #endregion
-
-        #region Helper methods
-
-        /// <summary>
-        /// Copies a number of bytes to the internal codec buffer - ready for processing
-        /// </summary>
-        /// <param name="data">The byte array that contains the data to copy</param>
-        /// <param name="startIndex">The index of the first byte to copy</param>
-        /// <param name="count">The number of bytes to copy from <c>data</c></param>
-        protected void copyInput(byte[] data, int startIndex, int count)
-        {
-            Array.Copy(data, startIndex, _inBuffer,0, count);
-            _ztream.next_in = _hInput.AddrOfPinnedObject();
-            _ztream.total_in = 0;
-            _ztream.avail_in = (uint)count;
-
-        }
-
-        /// <summary>
-        /// Resets the internal output buffers to a known state - ready for processing
-        /// </summary>
-        protected void resetOutput()
-        {
-            _ztream.total_out = 0;
-            _ztream.avail_out = kBufferSize;
-            _ztream.next_out = _hOutput.AddrOfPinnedObject();
-        }
-
-        /// <summary>
-        /// Updates the running checksum property
-        /// </summary>
-        /// <param name="newSum">The new checksum value</param>
-        protected void setChecksum(uint newSum)
-        {
-            _checksum = newSum;
-        }
-        #endregion
-
-    }
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+	/// <summary>
+	/// Implements the common functionality needed for all <see cref="Codec"/>s
+	/// </summary>
+	public abstract class CodecBase : Codec, IDisposable
+	{
+
+        #region Data members
+
+        /// <summary>
+        /// Instance of the internal zlib buffer structure that is
+        /// passed to all functions in the zlib dll
+        /// </summary>
+        internal ZStream _ztream = new ZStream();
+
+        /// <summary>
+        /// True if the object instance has been disposed, false otherwise
+        /// </summary>
+        protected bool _isDisposed = false;
+
+        /// <summary>
+        /// The size of the internal buffers
+        /// </summary>
+        protected const int kBufferSize = 16384;
+
+        private byte[] _outBuffer = new byte[kBufferSize];
+        private byte[] _inBuffer = new byte[kBufferSize];
+
+        private GCHandle _hInput;
+        private GCHandle _hOutput;
+
+        private uint _checksum = 0;
+
+        #endregion
+
+        /// <summary>
+        /// Initializes a new instance of the <c>CodeBase</c> class.
+        /// </summary>
+		public CodecBase()
+		{
+            try
+            {
+                _hInput = GCHandle.Alloc(_inBuffer, GCHandleType.Pinned);
+                _hOutput = GCHandle.Alloc(_outBuffer, GCHandleType.Pinned);
+            }
+            catch (Exception)
+            {
+                CleanUp(false);
+                throw;
+            }
+        }
+
+
+        #region Codec Members
+
+        /// <summary>
+        /// Occurs when more processed data are available.
+        /// </summary>
+        public event DataAvailableHandler DataAvailable;
+
+        /// <summary>
+        /// Fires the <see cref="DataAvailable"/> event
+        /// </summary>
+        protected void OnDataAvailable()
+        {
+            if (_ztream.total_out > 0)
+            {
+                if (DataAvailable != null)
+                    DataAvailable( _outBuffer, 0, (int)_ztream.total_out);
+                resetOutput();
+            }
+        }
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public void Add(byte[] data)
+        {
+            Add(data,0,data.Length);
+        }
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Add(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        public abstract void Finish();
+
+        /// <summary>
+        /// Gets the checksum of the data that has been added so far
+        /// </summary>
+        public uint Checksum { get { return _checksum; } }
+
+        #endregion
+
+        #region Destructor & IDisposable stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~CodecBase()
+        {
+            CleanUp(false);
+        }
+
+        /// <summary>
+        /// Releases any unmanaged resources and calls the <see cref="CleanUp()"/> method of the derived class
+        /// </summary>
+        public void Dispose()
+        {
+            CleanUp(true);
+        }
+
+        /// <summary>
+        /// Performs any codec specific cleanup
+        /// </summary>
+        /// <remarks>This must be implemented by a derived class</remarks>
+        protected abstract void CleanUp();
+
+        // performs the release of the handles and calls the derived CleanUp()
+        private void CleanUp(bool isDisposing)
+        {
+            if (!_isDisposed)
+            {
+                CleanUp();
+                if (_hInput.IsAllocated)
+                    _hInput.Free();
+                if (_hOutput.IsAllocated)
+                    _hOutput.Free();
+
+                _isDisposed = true;
+            }
+        }
+
+
+        #endregion
+
+        #region Helper methods
+
+        /// <summary>
+        /// Copies a number of bytes to the internal codec buffer - ready for processing
+        /// </summary>
+        /// <param name="data">The byte array that contains the data to copy</param>
+        /// <param name="startIndex">The index of the first byte to copy</param>
+        /// <param name="count">The number of bytes to copy from <c>data</c></param>
+        protected void copyInput(byte[] data, int startIndex, int count)
+        {
+            Array.Copy(data, startIndex, _inBuffer,0, count);
+            _ztream.next_in = _hInput.AddrOfPinnedObject();
+            _ztream.total_in = 0;
+            _ztream.avail_in = (uint)count;
+
+        }
+
+        /// <summary>
+        /// Resets the internal output buffers to a known state - ready for processing
+        /// </summary>
+        protected void resetOutput()
+        {
+            _ztream.total_out = 0;
+            _ztream.avail_out = kBufferSize;
+            _ztream.next_out = _hOutput.AddrOfPinnedObject();
+        }
+
+        /// <summary>
+        /// Updates the running checksum property
+        /// </summary>
+        /// <param name="newSum">The new checksum value</param>
+        protected void setChecksum(uint newSum)
+        {
+            _checksum = newSum;
+        }
+        #endregion
+
+    }
+}
@@ -1,106 +1,106 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace DotZLib
-{
-
-    /// <summary>
-    /// Implements a data compressor, using the deflate algorithm in the ZLib dll
-    /// </summary>
-	public sealed class Deflater : CodecBase
-	{
-        #region Dll imports
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
-        private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int deflate(ref ZStream sz, int flush);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int deflateReset(ref ZStream sz);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int deflateEnd(ref ZStream sz);
-        #endregion
-
-        /// <summary>
-        /// Constructs an new instance of the <c>Deflater</c>
-        /// </summary>
-        /// <param name="level">The compression level to use for this <c>Deflater</c></param>
-		public Deflater(CompressLevel level) : base()
-		{
-            int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
-            if (retval != 0)
-                throw new ZLibException(retval, "Could not initialize deflater");
-
-            resetOutput();
-		}
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
-        /// <param name="count">The number of bytes to add</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        public override void Add(byte[] data, int offset, int count)
-        {
-            if (data == null) throw new ArgumentNullException();
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > data.Length) throw new ArgumentException();
-
-            int total = count;
-            int inputIndex = offset;
-            int err = 0;
-
-            while (err >= 0 && inputIndex < total)
-            {
-                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
-                while (err >= 0 && _ztream.avail_in > 0)
-                {
-                    err = deflate(ref _ztream, (int)FlushTypes.None);
-                    if (err == 0)
-                        while (_ztream.avail_out == 0)
-                        {
-                            OnDataAvailable();
-                            err = deflate(ref _ztream, (int)FlushTypes.None);
-                        }
-                    inputIndex += (int)_ztream.total_in;
-                }
-            }
-            setChecksum( _ztream.adler );
-        }
-
-
-        /// <summary>
-        /// Finishes up any pending data that needs to be processed and handled.
-        /// </summary>
-        public override void Finish()
-        {
-            int err;
-            do
-            {
-                err = deflate(ref _ztream, (int)FlushTypes.Finish);
-                OnDataAvailable();
-            }
-            while (err == 0);
-            setChecksum( _ztream.adler );
-            deflateReset(ref _ztream);
-            resetOutput();
-        }
-
-        /// <summary>
-        /// Closes the internal zlib deflate stream
-        /// </summary>
-        protected override void CleanUp() { deflateEnd(ref _ztream); }
-
-    }
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+
+    /// <summary>
+    /// Implements a data compressor, using the deflate algorithm in the ZLib dll
+    /// </summary>
+	public sealed class Deflater : CodecBase
+	{
+        #region Dll imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern int deflateInit_(ref ZStream sz, int level, string vs, int size);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflate(ref ZStream sz, int flush);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflateReset(ref ZStream sz);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int deflateEnd(ref ZStream sz);
+        #endregion
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Deflater</c>
+        /// </summary>
+        /// <param name="level">The compression level to use for this <c>Deflater</c></param>
+		public Deflater(CompressLevel level) : base()
+		{
+            int retval = deflateInit_(ref _ztream, (int)level, Info.Version, Marshal.SizeOf(_ztream));
+            if (retval != 0)
+                throw new ZLibException(retval, "Could not initialize deflater");
+
+            resetOutput();
+		}
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public override void Add(byte[] data, int offset, int count)
+        {
+            if (data == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+
+            int total = count;
+            int inputIndex = offset;
+            int err = 0;
+
+            while (err >= 0 && inputIndex < total)
+            {
+                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
+                while (err >= 0 && _ztream.avail_in > 0)
+                {
+                    err = deflate(ref _ztream, (int)FlushTypes.None);
+                    if (err == 0)
+                        while (_ztream.avail_out == 0)
+                        {
+                            OnDataAvailable();
+                            err = deflate(ref _ztream, (int)FlushTypes.None);
+                        }
+                    inputIndex += (int)_ztream.total_in;
+                }
+            }
+            setChecksum( _ztream.adler );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        public override void Finish()
+        {
+            int err;
+            do
+            {
+                err = deflate(ref _ztream, (int)FlushTypes.Finish);
+                OnDataAvailable();
+            }
+            while (err == 0);
+            setChecksum( _ztream.adler );
+            deflateReset(ref _ztream);
+            resetOutput();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib deflate stream
+        /// </summary>
+        protected override void CleanUp() { deflateEnd(ref _ztream); }
+
+    }
+}
@@ -1,288 +1,288 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Text;
-
-
-namespace DotZLib
-{
-
-    #region Internal types
-
-    /// <summary>
-    /// Defines constants for the various flush types used with zlib
-    /// </summary>
-    internal enum FlushTypes
-    {
-        None,  Partial,  Sync,  Full,  Finish,  Block
-    }
-
-    #region ZStream structure
-    // internal mapping of the zlib zstream structure for marshalling
-    [StructLayoutAttribute(LayoutKind.Sequential, Pack=4, Size=0, CharSet=CharSet.Ansi)]
-    internal struct ZStream
-    {
-        public IntPtr next_in;
-        public uint avail_in;
-        public uint total_in;
-
-        public IntPtr next_out;
-        public uint avail_out;
-        public uint total_out;
-
-        [MarshalAs(UnmanagedType.LPStr)]
-        string msg;
-        uint state;
-
-        uint zalloc;
-        uint zfree;
-        uint opaque;
-
-        int data_type;
-        public uint adler;
-        uint reserved;
-    }
-
-    #endregion
-
-    #endregion
-
-    #region Public enums
-    /// <summary>
-    /// Defines constants for the available compression levels in zlib
-    /// </summary>
-    public enum CompressLevel : int
-    {
-        /// <summary>
-        /// The default compression level with a reasonable compromise between compression and speed
-        /// </summary>
-        Default = -1,
-        /// <summary>
-        /// No compression at all. The data are passed straight through.
-        /// </summary>
-        None = 0,
-        /// <summary>
-        /// The maximum compression rate available.
-        /// </summary>
-        Best = 9,
-        /// <summary>
-        /// The fastest available compression level.
-        /// </summary>
-        Fastest = 1
-    }
-    #endregion
-
-    #region Exception classes
-    /// <summary>
-    /// The exception that is thrown when an error occurs on the zlib dll
-    /// </summary>
-    public class ZLibException : ApplicationException
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
-        /// error message and error code
-        /// </summary>
-        /// <param name="errorCode">The zlib error code that caused the exception</param>
-        /// <param name="msg">A message that (hopefully) describes the error</param>
-        public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg))
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
-        /// error code
-        /// </summary>
-        /// <param name="errorCode">The zlib error code that caused the exception</param>
-        public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode))
-        {
-        }
-    }
-    #endregion
-
-    #region Interfaces
-
-    /// <summary>
-    /// Declares methods and properties that enables a running checksum to be calculated
-    /// </summary>
-    public interface ChecksumGenerator
-    {
-        /// <summary>
-        /// Gets the current value of the checksum
-        /// </summary>
-        uint Value { get; }
-
-        /// <summary>
-        /// Clears the current checksum to 0
-        /// </summary>
-        void Reset();
-
-        /// <summary>
-        /// Updates the current checksum with an array of bytes
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        void Update(byte[] data);
-
-        /// <summary>
-        /// Updates the current checksum with part of an array of bytes
-        /// </summary>
-        /// <param name="data">The data to update the checksum with</param>
-        /// <param name="offset">Where in <c>data</c> to start updating</param>
-        /// <param name="count">The number of bytes from <c>data</c> to use</param>
-        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
-        /// <exception cref="ArgumentNullException"><c>data</c> is a null reference</exception>
-        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
-        void Update(byte[] data, int offset, int count);
-
-        /// <summary>
-        /// Updates the current checksum with the data from a string
-        /// </summary>
-        /// <param name="data">The string to update the checksum with</param>
-        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
-        void Update(string data);
-
-        /// <summary>
-        /// Updates the current checksum with the data from a string, using a specific encoding
-        /// </summary>
-        /// <param name="data">The string to update the checksum with</param>
-        /// <param name="encoding">The encoding to use</param>
-        void Update(string data, Encoding encoding);
-    }
-
-
-    /// <summary>
-    /// Represents the method that will be called from a codec when new data
-    /// are available.
-    /// </summary>
-    /// <paramref name="data">The byte array containing the processed data</paramref>
-    /// <paramref name="startIndex">The index of the first processed byte in <c>data</c></paramref>
-    /// <paramref name="count">The number of processed bytes available</paramref>
-    /// <remarks>On return from this method, the data may be overwritten, so grab it while you can.
-    /// You cannot assume that startIndex will be zero.
-    /// </remarks>
-    public delegate void DataAvailableHandler(byte[] data, int startIndex, int count);
-
-    /// <summary>
-    /// Declares methods and events for implementing compressors/decompressors
-    /// </summary>
-    public interface Codec
-    {
-        /// <summary>
-        /// Occurs when more processed data are available.
-        /// </summary>
-        event DataAvailableHandler DataAvailable;
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        void Add(byte[] data);
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
-        /// <param name="count">The number of bytes to add</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        void Add(byte[] data, int offset, int count);
-
-        /// <summary>
-        /// Finishes up any pending data that needs to be processed and handled.
-        /// </summary>
-        void Finish();
-
-        /// <summary>
-        /// Gets the checksum of the data that has been added so far
-        /// </summary>
-        uint Checksum { get; }
-
-
-    }
-
-    #endregion
-
-    #region Classes
-    /// <summary>
-    /// Encapsulates general information about the ZLib library
-    /// </summary>
-    public class Info
-    {
-        #region DLL imports
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern uint zlibCompileFlags();
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern string zlibVersion();
-        #endregion
-
-        #region Private stuff
-        private uint _flags;
-
-        // helper function that unpacks a bitsize mask
-        private static int bitSize(uint bits)
-        {
-            switch (bits)
-            {
-                case 0: return 16;
-                case 1: return 32;
-                case 2: return 64;
-            }
-            return -1;
-        }
-        #endregion
-
-        /// <summary>
-        /// Constructs an instance of the <c>Info</c> class.
-        /// </summary>
-        public Info()
-        {
-            _flags = zlibCompileFlags();
-        }
-
-        /// <summary>
-        /// True if the library is compiled with debug info
-        /// </summary>
-        public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } }
-
-        /// <summary>
-        /// True if the library is compiled with assembly optimizations
-        /// </summary>
-        public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } }
-
-        /// <summary>
-        /// Gets the size of the unsigned int that was compiled into Zlib
-        /// </summary>
-        public int SizeOfUInt { get { return bitSize(_flags & 3); } }
-
-        /// <summary>
-        /// Gets the size of the unsigned long that was compiled into Zlib
-        /// </summary>
-        public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } }
-
-        /// <summary>
-        /// Gets the size of the pointers that were compiled into Zlib
-        /// </summary>
-        public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } }
-
-        /// <summary>
-        /// Gets the size of the z_off_t type that was compiled into Zlib
-        /// </summary>
-        public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } }
-
-        /// <summary>
-        /// Gets the version of ZLib as a string, e.g. "1.2.1"
-        /// </summary>
-        public static string Version { get { return zlibVersion(); } }
-    }
-
-    #endregion
-
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Text;
+
+
+namespace DotZLib
+{
+
+    #region Internal types
+
+    /// <summary>
+    /// Defines constants for the various flush types used with zlib
+    /// </summary>
+    internal enum FlushTypes
+    {
+        None,  Partial,  Sync,  Full,  Finish,  Block
+    }
+
+    #region ZStream structure
+    // internal mapping of the zlib zstream structure for marshalling
+    [StructLayoutAttribute(LayoutKind.Sequential, Pack=4, Size=0, CharSet=CharSet.Ansi)]
+    internal struct ZStream
+    {
+        public IntPtr next_in;
+        public uint avail_in;
+        public uint total_in;
+
+        public IntPtr next_out;
+        public uint avail_out;
+        public uint total_out;
+
+        [MarshalAs(UnmanagedType.LPStr)]
+        string msg;
+        uint state;
+
+        uint zalloc;
+        uint zfree;
+        uint opaque;
+
+        int data_type;
+        public uint adler;
+        uint reserved;
+    }
+
+    #endregion
+
+    #endregion
+
+    #region Public enums
+    /// <summary>
+    /// Defines constants for the available compression levels in zlib
+    /// </summary>
+    public enum CompressLevel : int
+    {
+        /// <summary>
+        /// The default compression level with a reasonable compromise between compression and speed
+        /// </summary>
+        Default = -1,
+        /// <summary>
+        /// No compression at all. The data are passed straight through.
+        /// </summary>
+        None = 0,
+        /// <summary>
+        /// The maximum compression rate available.
+        /// </summary>
+        Best = 9,
+        /// <summary>
+        /// The fastest available compression level.
+        /// </summary>
+        Fastest = 1
+    }
+    #endregion
+
+    #region Exception classes
+    /// <summary>
+    /// The exception that is thrown when an error occurs on the zlib dll
+    /// </summary>
+    public class ZLibException : ApplicationException
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
+        /// error message and error code
+        /// </summary>
+        /// <param name="errorCode">The zlib error code that caused the exception</param>
+        /// <param name="msg">A message that (hopefully) describes the error</param>
+        public ZLibException(int errorCode, string msg) : base(String.Format("ZLib error {0} {1}", errorCode, msg))
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ZLibException"/> class with a specified
+        /// error code
+        /// </summary>
+        /// <param name="errorCode">The zlib error code that caused the exception</param>
+        public ZLibException(int errorCode) : base(String.Format("ZLib error {0}", errorCode))
+        {
+        }
+    }
+    #endregion
+
+    #region Interfaces
+
+    /// <summary>
+    /// Declares methods and properties that enables a running checksum to be calculated
+    /// </summary>
+    public interface ChecksumGenerator
+    {
+        /// <summary>
+        /// Gets the current value of the checksum
+        /// </summary>
+        uint Value { get; }
+
+        /// <summary>
+        /// Clears the current checksum to 0
+        /// </summary>
+        void Reset();
+
+        /// <summary>
+        /// Updates the current checksum with an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        void Update(byte[] data);
+
+        /// <summary>
+        /// Updates the current checksum with part of an array of bytes
+        /// </summary>
+        /// <param name="data">The data to update the checksum with</param>
+        /// <param name="offset">Where in <c>data</c> to start updating</param>
+        /// <param name="count">The number of bytes from <c>data</c> to use</param>
+        /// <exception cref="ArgumentException">The sum of offset and count is larger than the length of <c>data</c></exception>
+        /// <exception cref="ArgumentNullException"><c>data</c> is a null reference</exception>
+        /// <exception cref="ArgumentOutOfRangeException">Offset or count is negative.</exception>
+        void Update(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <remarks>The characters in the string are converted by the UTF-8 encoding</remarks>
+        void Update(string data);
+
+        /// <summary>
+        /// Updates the current checksum with the data from a string, using a specific encoding
+        /// </summary>
+        /// <param name="data">The string to update the checksum with</param>
+        /// <param name="encoding">The encoding to use</param>
+        void Update(string data, Encoding encoding);
+    }
+
+
+    /// <summary>
+    /// Represents the method that will be called from a codec when new data
+    /// are available.
+    /// </summary>
+    /// <paramref name="data">The byte array containing the processed data</paramref>
+    /// <paramref name="startIndex">The index of the first processed byte in <c>data</c></paramref>
+    /// <paramref name="count">The number of processed bytes available</paramref>
+    /// <remarks>On return from this method, the data may be overwritten, so grab it while you can.
+    /// You cannot assume that startIndex will be zero.
+    /// </remarks>
+    public delegate void DataAvailableHandler(byte[] data, int startIndex, int count);
+
+    /// <summary>
+    /// Declares methods and events for implementing compressors/decompressors
+    /// </summary>
+    public interface Codec
+    {
+        /// <summary>
+        /// Occurs when more processed data are available.
+        /// </summary>
+        event DataAvailableHandler DataAvailable;
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        void Add(byte[] data);
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        void Add(byte[] data, int offset, int count);
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        void Finish();
+
+        /// <summary>
+        /// Gets the checksum of the data that has been added so far
+        /// </summary>
+        uint Checksum { get; }
+
+
+    }
+
+    #endregion
+
+    #region Classes
+    /// <summary>
+    /// Encapsulates general information about the ZLib library
+    /// </summary>
+    public class Info
+    {
+        #region DLL imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern uint zlibCompileFlags();
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern string zlibVersion();
+        #endregion
+
+        #region Private stuff
+        private uint _flags;
+
+        // helper function that unpacks a bitsize mask
+        private static int bitSize(uint bits)
+        {
+            switch (bits)
+            {
+                case 0: return 16;
+                case 1: return 32;
+                case 2: return 64;
+            }
+            return -1;
+        }
+        #endregion
+
+        /// <summary>
+        /// Constructs an instance of the <c>Info</c> class.
+        /// </summary>
+        public Info()
+        {
+            _flags = zlibCompileFlags();
+        }
+
+        /// <summary>
+        /// True if the library is compiled with debug info
+        /// </summary>
+        public bool HasDebugInfo { get { return 0 != (_flags & 0x100); } }
+
+        /// <summary>
+        /// True if the library is compiled with assembly optimizations
+        /// </summary>
+        public bool UsesAssemblyCode { get { return 0 != (_flags & 0x200); } }
+
+        /// <summary>
+        /// Gets the size of the unsigned int that was compiled into Zlib
+        /// </summary>
+        public int SizeOfUInt { get { return bitSize(_flags & 3); } }
+
+        /// <summary>
+        /// Gets the size of the unsigned long that was compiled into Zlib
+        /// </summary>
+        public int SizeOfULong { get { return bitSize((_flags >> 2) & 3); } }
+
+        /// <summary>
+        /// Gets the size of the pointers that were compiled into Zlib
+        /// </summary>
+        public int SizeOfPointer { get { return bitSize((_flags >> 4) & 3); } }
+
+        /// <summary>
+        /// Gets the size of the z_off_t type that was compiled into Zlib
+        /// </summary>
+        public int SizeOfOffset { get { return bitSize((_flags >> 6) & 3); } }
+
+        /// <summary>
+        /// Gets the version of ZLib as a string, e.g. "1.2.1"
+        /// </summary>
+        public static string Version { get { return zlibVersion(); } }
+    }
+
+    #endregion
+
+}
@@ -1,301 +1,301 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.IO;
-using System.Runtime.InteropServices;
-
-namespace DotZLib
-{
-	/// <summary>
-	/// Implements a compressed <see cref="Stream"/>, in GZip (.gz) format.
-	/// </summary>
-	public class GZipStream : Stream, IDisposable
-	{
-        #region Dll Imports
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
-        private static extern IntPtr gzopen(string name, string mode);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int gzclose(IntPtr gzFile);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int gzwrite(IntPtr gzFile, int data, int length);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int gzread(IntPtr gzFile, int data, int length);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int gzgetc(IntPtr gzFile);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int gzputc(IntPtr gzFile, int c);
-
-        #endregion
-
-        #region Private data
-        private IntPtr _gzFile;
-        private bool _isDisposed = false;
-        private bool _isWriting;
-        #endregion
-
-        #region Constructors
-        /// <summary>
-        /// Creates a new file as a writeable GZipStream
-        /// </summary>
-        /// <param name="fileName">The name of the compressed file to create</param>
-        /// <param name="level">The compression level to use when adding data</param>
-        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
-		public GZipStream(string fileName, CompressLevel level)
-		{
-            _isWriting = true;
-            _gzFile = gzopen(fileName, String.Format("wb{0}", (int)level));
-            if (_gzFile == IntPtr.Zero)
-                throw new ZLibException(-1, "Could not open " + fileName);
-		}
-
-        /// <summary>
-        /// Opens an existing file as a readable GZipStream
-        /// </summary>
-        /// <param name="fileName">The name of the file to open</param>
-        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
-        public GZipStream(string fileName)
-        {
-            _isWriting = false;
-            _gzFile = gzopen(fileName, "rb");
-            if (_gzFile == IntPtr.Zero)
-                throw new ZLibException(-1, "Could not open " + fileName);
-
-        }
-        #endregion
-
-        #region Access properties
-        /// <summary>
-        /// Returns true of this stream can be read from, false otherwise
-        /// </summary>
-        public override bool CanRead
-        {
-            get
-            {
-                return !_isWriting;
-            }
-        }
-
-
-        /// <summary>
-        /// Returns false.
-        /// </summary>
-        public override bool CanSeek
-        {
-            get
-            {
-                return false;
-            }
-        }
-
-        /// <summary>
-        /// Returns true if this tsream is writeable, false otherwise
-        /// </summary>
-        public override bool CanWrite
-        {
-            get
-            {
-                return _isWriting;
-            }
-        }
-        #endregion
-
-        #region Destructor & IDispose stuff
-
-        /// <summary>
-        /// Destroys this instance
-        /// </summary>
-        ~GZipStream()
-        {
-            cleanUp(false);
-        }
-
-        /// <summary>
-        /// Closes the external file handle
-        /// </summary>
-        public void Dispose()
-        {
-            cleanUp(true);
-        }
-
-        // Does the actual closing of the file handle.
-        private void cleanUp(bool isDisposing)
-        {
-            if (!_isDisposed)
-            {
-                gzclose(_gzFile);
-                _isDisposed = true;
-            }
-        }
-        #endregion
-
-        #region Basic reading and writing
-        /// <summary>
-        /// Attempts to read a number of bytes from the stream.
-        /// </summary>
-        /// <param name="buffer">The destination data buffer</param>
-        /// <param name="offset">The index of the first destination byte in <c>buffer</c></param>
-        /// <param name="count">The number of bytes requested</param>
-        /// <returns>The number of bytes read</returns>
-        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
-        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
-        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
-        /// <exception cref="NotSupportedException">If this stream is not readable.</exception>
-        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
-        public override int Read(byte[] buffer, int offset, int count)
-        {
-            if (!CanRead) throw new NotSupportedException();
-            if (buffer == null) throw new ArgumentNullException();
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > buffer.Length) throw new ArgumentException();
-            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
-
-            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
-            int result;
-            try
-            {
-                result = gzread(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
-                if (result < 0)
-                    throw new IOException();
-            }
-            finally
-            {
-                h.Free();
-            }
-            return result;
-        }
-
-        /// <summary>
-        /// Attempts to read a single byte from the stream.
-        /// </summary>
-        /// <returns>The byte that was read, or -1 in case of error or End-Of-File</returns>
-        public override int ReadByte()
-        {
-            if (!CanRead) throw new NotSupportedException();
-            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
-            return gzgetc(_gzFile);
-        }
-
-        /// <summary>
-        /// Writes a number of bytes to the stream
-        /// </summary>
-        /// <param name="buffer"></param>
-        /// <param name="offset"></param>
-        /// <param name="count"></param>
-        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
-        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
-        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
-        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
-        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
-        public override void Write(byte[] buffer, int offset, int count)
-        {
-            if (!CanWrite) throw new NotSupportedException();
-            if (buffer == null) throw new ArgumentNullException();
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > buffer.Length) throw new ArgumentException();
-            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
-
-            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
-            try
-            {
-                int result = gzwrite(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
-                if (result < 0)
-                    throw new IOException();
-            }
-            finally
-            {
-                h.Free();
-            }
-        }
-
-        /// <summary>
-        /// Writes a single byte to the stream
-        /// </summary>
-        /// <param name="value">The byte to add to the stream.</param>
-        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
-        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
-        public override void WriteByte(byte value)
-        {
-            if (!CanWrite) throw new NotSupportedException();
-            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
-
-            int result = gzputc(_gzFile, (int)value);
-            if (result < 0)
-                throw new IOException();
-        }
-        #endregion
-
-        #region Position & length stuff
-        /// <summary>
-        /// Not supported.
-        /// </summary>
-        /// <param name="value"></param>
-        /// <exception cref="NotSupportedException">Always thrown</exception>
-        public override void SetLength(long value)
-        {
-            throw new NotSupportedException();
-        }
-
-        /// <summary>
-        ///  Not supported.
-        /// </summary>
-        /// <param name="offset"></param>
-        /// <param name="origin"></param>
-        /// <returns></returns>
-        /// <exception cref="NotSupportedException">Always thrown</exception>
-        public override long Seek(long offset, SeekOrigin origin)
-        {
-            throw new NotSupportedException();
-        }
-
-        /// <summary>
-        /// Flushes the <c>GZipStream</c>.
-        /// </summary>
-        /// <remarks>In this implementation, this method does nothing. This is because excessive
-        /// flushing may degrade the achievable compression rates.</remarks>
-        public override void Flush()
-        {
-            // left empty on purpose
-        }
-
-        /// <summary>
-        /// Gets/sets the current position in the <c>GZipStream</c>. Not supported.
-        /// </summary>
-        /// <remarks>In this implementation this property is not supported</remarks>
-        /// <exception cref="NotSupportedException">Always thrown</exception>
-        public override long Position
-        {
-            get
-            {
-                throw new NotSupportedException();
-            }
-            set
-            {
-                throw new NotSupportedException();
-            }
-        }
-
-        /// <summary>
-        /// Gets the size of the stream. Not supported.
-        /// </summary>
-        /// <remarks>In this implementation this property is not supported</remarks>
-        /// <exception cref="NotSupportedException">Always thrown</exception>
-        public override long Length
-        {
-            get
-            {
-                throw new NotSupportedException();
-            }
-        }
-        #endregion
-    }
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+	/// <summary>
+	/// Implements a compressed <see cref="Stream"/>, in GZip (.gz) format.
+	/// </summary>
+	public class GZipStream : Stream, IDisposable
+	{
+        #region Dll Imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern IntPtr gzopen(string name, string mode);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzclose(IntPtr gzFile);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzwrite(IntPtr gzFile, int data, int length);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzread(IntPtr gzFile, int data, int length);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzgetc(IntPtr gzFile);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int gzputc(IntPtr gzFile, int c);
+
+        #endregion
+
+        #region Private data
+        private IntPtr _gzFile;
+        private bool _isDisposed = false;
+        private bool _isWriting;
+        #endregion
+
+        #region Constructors
+        /// <summary>
+        /// Creates a new file as a writeable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the compressed file to create</param>
+        /// <param name="level">The compression level to use when adding data</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+		public GZipStream(string fileName, CompressLevel level)
+		{
+            _isWriting = true;
+            _gzFile = gzopen(fileName, String.Format("wb{0}", (int)level));
+            if (_gzFile == IntPtr.Zero)
+                throw new ZLibException(-1, "Could not open " + fileName);
+		}
+
+        /// <summary>
+        /// Opens an existing file as a readable GZipStream
+        /// </summary>
+        /// <param name="fileName">The name of the file to open</param>
+        /// <exception cref="ZLibException">If an error occurred in the internal zlib function</exception>
+        public GZipStream(string fileName)
+        {
+            _isWriting = false;
+            _gzFile = gzopen(fileName, "rb");
+            if (_gzFile == IntPtr.Zero)
+                throw new ZLibException(-1, "Could not open " + fileName);
+
+        }
+        #endregion
+
+        #region Access properties
+        /// <summary>
+        /// Returns true of this stream can be read from, false otherwise
+        /// </summary>
+        public override bool CanRead
+        {
+            get
+            {
+                return !_isWriting;
+            }
+        }
+
+
+        /// <summary>
+        /// Returns false.
+        /// </summary>
+        public override bool CanSeek
+        {
+            get
+            {
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// Returns true if this tsream is writeable, false otherwise
+        /// </summary>
+        public override bool CanWrite
+        {
+            get
+            {
+                return _isWriting;
+            }
+        }
+        #endregion
+
+        #region Destructor & IDispose stuff
+
+        /// <summary>
+        /// Destroys this instance
+        /// </summary>
+        ~GZipStream()
+        {
+            cleanUp(false);
+        }
+
+        /// <summary>
+        /// Closes the external file handle
+        /// </summary>
+        public void Dispose()
+        {
+            cleanUp(true);
+        }
+
+        // Does the actual closing of the file handle.
+        private void cleanUp(bool isDisposing)
+        {
+            if (!_isDisposed)
+            {
+                gzclose(_gzFile);
+                _isDisposed = true;
+            }
+        }
+        #endregion
+
+        #region Basic reading and writing
+        /// <summary>
+        /// Attempts to read a number of bytes from the stream.
+        /// </summary>
+        /// <param name="buffer">The destination data buffer</param>
+        /// <param name="offset">The index of the first destination byte in <c>buffer</c></param>
+        /// <param name="count">The number of bytes requested</param>
+        /// <returns>The number of bytes read</returns>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not readable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            if (!CanRead) throw new NotSupportedException();
+            if (buffer == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > buffer.Length) throw new ArgumentException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+            int result;
+            try
+            {
+                result = gzread(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
+                if (result < 0)
+                    throw new IOException();
+            }
+            finally
+            {
+                h.Free();
+            }
+            return result;
+        }
+
+        /// <summary>
+        /// Attempts to read a single byte from the stream.
+        /// </summary>
+        /// <returns>The byte that was read, or -1 in case of error or End-Of-File</returns>
+        public override int ReadByte()
+        {
+            if (!CanRead) throw new NotSupportedException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+            return gzgetc(_gzFile);
+        }
+
+        /// <summary>
+        /// Writes a number of bytes to the stream
+        /// </summary>
+        /// <param name="buffer"></param>
+        /// <param name="offset"></param>
+        /// <param name="count"></param>
+        /// <exception cref="ArgumentNullException">If <c>buffer</c> is null</exception>
+        /// <exception cref="ArgumentOutOfRangeException">If <c>count</c> or <c>offset</c> are negative</exception>
+        /// <exception cref="ArgumentException">If <c>offset</c>  + <c>count</c> is &gt; buffer.Length</exception>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            if (!CanWrite) throw new NotSupportedException();
+            if (buffer == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > buffer.Length) throw new ArgumentException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            GCHandle h = GCHandle.Alloc(buffer, GCHandleType.Pinned);
+            try
+            {
+                int result = gzwrite(_gzFile, h.AddrOfPinnedObject().ToInt32() + offset, count);
+                if (result < 0)
+                    throw new IOException();
+            }
+            finally
+            {
+                h.Free();
+            }
+        }
+
+        /// <summary>
+        /// Writes a single byte to the stream
+        /// </summary>
+        /// <param name="value">The byte to add to the stream.</param>
+        /// <exception cref="NotSupportedException">If this stream is not writeable.</exception>
+        /// <exception cref="ObjectDisposedException">If this stream has been disposed.</exception>
+        public override void WriteByte(byte value)
+        {
+            if (!CanWrite) throw new NotSupportedException();
+            if (_isDisposed) throw new ObjectDisposedException("GZipStream");
+
+            int result = gzputc(_gzFile, (int)value);
+            if (result < 0)
+                throw new IOException();
+        }
+        #endregion
+
+        #region Position & length stuff
+        /// <summary>
+        /// Not supported.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override void SetLength(long value)
+        {
+            throw new NotSupportedException();
+        }
+
+        /// <summary>
+        ///  Not supported.
+        /// </summary>
+        /// <param name="offset"></param>
+        /// <param name="origin"></param>
+        /// <returns></returns>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Seek(long offset, SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+
+        /// <summary>
+        /// Flushes the <c>GZipStream</c>.
+        /// </summary>
+        /// <remarks>In this implementation, this method does nothing. This is because excessive
+        /// flushing may degrade the achievable compression rates.</remarks>
+        public override void Flush()
+        {
+            // left empty on purpose
+        }
+
+        /// <summary>
+        /// Gets/sets the current position in the <c>GZipStream</c>. Not supported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Position
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+            set
+            {
+                throw new NotSupportedException();
+            }
+        }
+
+        /// <summary>
+        /// Gets the size of the stream. Not supported.
+        /// </summary>
+        /// <remarks>In this implementation this property is not supported</remarks>
+        /// <exception cref="NotSupportedException">Always thrown</exception>
+        public override long Length
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+        }
+        #endregion
+    }
+}
@@ -1,105 +1,105 @@
-//
-// © Copyright Henrik Ravn 2004
-//
-// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-using System;
-using System.Diagnostics;
-using System.Runtime.InteropServices;
-
-namespace DotZLib
-{
-
-    /// <summary>
-    /// Implements a data decompressor, using the inflate algorithm in the ZLib dll
-    /// </summary>
-    public class Inflater : CodecBase
-	{
-        #region Dll imports
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
-        private static extern int inflateInit_(ref ZStream sz, string vs, int size);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int inflate(ref ZStream sz, int flush);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int inflateReset(ref ZStream sz);
-
-        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
-        private static extern int inflateEnd(ref ZStream sz);
-        #endregion
-
-        /// <summary>
-        /// Constructs an new instance of the <c>Inflater</c>
-        /// </summary>
-        public Inflater() : base()
-		{
-            int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream));
-            if (retval != 0)
-                throw new ZLibException(retval, "Could not initialize inflater");
-
-            resetOutput();
-        }
-
-
-        /// <summary>
-        /// Adds more data to the codec to be processed.
-        /// </summary>
-        /// <param name="data">Byte array containing the data to be added to the codec</param>
-        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
-        /// <param name="count">The number of bytes to add</param>
-        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
-        public override void Add(byte[] data, int offset, int count)
-        {
-            if (data == null) throw new ArgumentNullException();
-            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
-            if ((offset+count) > data.Length) throw new ArgumentException();
-
-            int total = count;
-            int inputIndex = offset;
-            int err = 0;
-
-            while (err >= 0 && inputIndex < total)
-            {
-                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
-                err = inflate(ref _ztream, (int)FlushTypes.None);
-                if (err == 0)
-                    while (_ztream.avail_out == 0)
-                    {
-                        OnDataAvailable();
-                        err = inflate(ref _ztream, (int)FlushTypes.None);
-                    }
-
-                inputIndex += (int)_ztream.total_in;
-            }
-            setChecksum( _ztream.adler );
-        }
-
-
-        /// <summary>
-        /// Finishes up any pending data that needs to be processed and handled.
-        /// </summary>
-        public override void Finish()
-        {
-            int err;
-            do
-            {
-                err = inflate(ref _ztream, (int)FlushTypes.Finish);
-                OnDataAvailable();
-            }
-            while (err == 0);
-            setChecksum( _ztream.adler );
-            inflateReset(ref _ztream);
-            resetOutput();
-        }
-
-        /// <summary>
-        /// Closes the internal zlib inflate stream
-        /// </summary>
-        protected override void CleanUp() { inflateEnd(ref _ztream); }
-
-
-	}
-}
+//
+// © Copyright Henrik Ravn 2004
+//
+// Use, modification and distribution are subject to the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace DotZLib
+{
+
+    /// <summary>
+    /// Implements a data decompressor, using the inflate algorithm in the ZLib dll
+    /// </summary>
+    public class Inflater : CodecBase
+	{
+        #region Dll imports
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl, CharSet=CharSet.Ansi)]
+        private static extern int inflateInit_(ref ZStream sz, string vs, int size);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflate(ref ZStream sz, int flush);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflateReset(ref ZStream sz);
+
+        [DllImport("ZLIB1.dll", CallingConvention=CallingConvention.Cdecl)]
+        private static extern int inflateEnd(ref ZStream sz);
+        #endregion
+
+        /// <summary>
+        /// Constructs an new instance of the <c>Inflater</c>
+        /// </summary>
+        public Inflater() : base()
+		{
+            int retval = inflateInit_(ref _ztream, Info.Version, Marshal.SizeOf(_ztream));
+            if (retval != 0)
+                throw new ZLibException(retval, "Could not initialize inflater");
+
+            resetOutput();
+        }
+
+
+        /// <summary>
+        /// Adds more data to the codec to be processed.
+        /// </summary>
+        /// <param name="data">Byte array containing the data to be added to the codec</param>
+        /// <param name="offset">The index of the first byte to add from <c>data</c></param>
+        /// <param name="count">The number of bytes to add</param>
+        /// <remarks>Adding data may, or may not, raise the <c>DataAvailable</c> event</remarks>
+        public override void Add(byte[] data, int offset, int count)
+        {
+            if (data == null) throw new ArgumentNullException();
+            if (offset < 0 || count < 0) throw new ArgumentOutOfRangeException();
+            if ((offset+count) > data.Length) throw new ArgumentException();
+
+            int total = count;
+            int inputIndex = offset;
+            int err = 0;
+
+            while (err >= 0 && inputIndex < total)
+            {
+                copyInput(data, inputIndex, Math.Min(total - inputIndex, kBufferSize));
+                err = inflate(ref _ztream, (int)FlushTypes.None);
+                if (err == 0)
+                    while (_ztream.avail_out == 0)
+                    {
+                        OnDataAvailable();
+                        err = inflate(ref _ztream, (int)FlushTypes.None);
+                    }
+
+                inputIndex += (int)_ztream.total_in;
+            }
+            setChecksum( _ztream.adler );
+        }
+
+
+        /// <summary>
+        /// Finishes up any pending data that needs to be processed and handled.
+        /// </summary>
+        public override void Finish()
+        {
+            int err;
+            do
+            {
+                err = inflate(ref _ztream, (int)FlushTypes.Finish);
+                OnDataAvailable();
+            }
+            while (err == 0);
+            setChecksum( _ztream.adler );
+            inflateReset(ref _ztream);
+            resetOutput();
+        }
+
+        /// <summary>
+        /// Closes the internal zlib inflate stream
+        /// </summary>
+        protected override void CleanUp() { inflateEnd(ref _ztream); }
+
+
+	}
+}
@@ -156,7 +156,7 @@ namespace DotZLibTests
        public void Info_Version()
        {
            Info info = new Info();
-            Assert.AreEqual("1.3.1", Info.Version);
+            Assert.AreEqual("1.3.0", 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) 1995-2024 Mark Adler
+ * Copyright (C) 1995-2023 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

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

 const char inflate9_copyright[] =
-   " inflate9 1.3.1 Copyright 1995-2024 Mark Adler ";
+   " inflate9 1.3 Copyright 1995-2023 Mark Adler ";
 /*
  If you use the zlib library in a product, an acknowledgment is welcome
  in the documentation of your product. If for some reason you cannot
@@ -59,7 +59,7 @@ int inflate_table9(codetype type, unsigned short FAR *lens, unsigned codes,
    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
        128, 128, 128, 128, 128, 128, 128, 128, 129, 129, 129, 129,
        130, 130, 130, 130, 131, 131, 131, 131, 132, 132, 132, 132,
-        133, 133, 133, 133, 144, 203, 77};
+        133, 133, 133, 133, 144, 198, 203};
    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,
@@ -41,8 +41,8 @@ typedef struct {
   examples/enough.c found in the zlib distribution.  The arguments to that
   program are the number of symbols, the initial root table size, and the
   maximum bit length of a code.  "enough 286 9 15" for literal/length codes
-   returns 852, and "enough 32 6 15" for distance codes returns 594. The
-   initial root table size (9 or 6) is found in the fifth argument of the
+   returns returns 852, and "enough 32 6 15" for distance codes returns 594.
+   The initial root table size (9 or 6) is found in the fifth argument of the
   inflate_table() calls in infback9.c.  If the root table size is changed,
   then these maximum sizes would be need to be recalculated and updated. */
 #define ENOUGH_LENS 852
@@ -413,7 +413,7 @@ template<typename T1, typename T2>
  class gzomanip2
  {
  public:
-    // Allows inserter to peek at internals
+    // Allows insertor to peek at internals
    template <typename Ta, typename Tb>
      friend gzofstream&
      operator<<(gzofstream&,
@@ -452,7 +452,7 @@ template<typename T1, typename T2>
  : func(f), val1(v1), val2(v2)
  { }

-// Inserter applies underlying manipulator function to stream
+// Insertor applies underlying manipulator function to stream
 template<typename T1, typename T2>
  inline gzofstream&
  operator<<(gzofstream& s, const gzomanip2<T1,T2>& m)
@@ -1,4 +1,4 @@
-CC?=cc
+CC=cc
 CFLAGS := $(CFLAGS) -O -I../..

 UNZ_OBJS = miniunz.o unzip.o ioapi.o ../../libz.a
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

-AC_INIT([minizip], [1.3.1], [bugzilla.redhat.com])
+AC_INIT([minizip], [1.3.0], [bugzilla.redhat.com])
 AC_CONFIG_SRCDIR([minizip.c])
 AM_INIT_AUTOMAKE([foreign])
 LT_INIT
@@ -50,7 +50,7 @@ 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;
@@ -144,7 +144,7 @@ typedef long     (ZCALLBACK *tell_file_func)      (voidpf opaque, voidpf stream)
 typedef long     (ZCALLBACK *seek_file_func)      (voidpf opaque, voidpf stream, uLong offset, int origin);


-/* here is the "old" 32 bits structure */
+/* here is the "old" 32 bits structure structure */
 typedef struct zlib_filefunc_def_s
 {
    open_file_func      zopen_file;
@@ -79,7 +79,7 @@

 /* change_file_date : change the date/time of a file
    filename : the filename of the file where date/time must be modified
-    dosdate : the new date at the MSDOS format (4 bytes)
+    dosdate : the new date at the MSDos format (4 bytes)
    tmu_date : the SAME new date at the tm_unz format */
 static void change_file_date(const char *filename, uLong dosdate, tm_unz tmu_date) {
 #ifdef _WIN32
@@ -186,7 +186,7 @@ static int makedir(const char *newdir) {
 }

 static void do_banner(void) {
-    printf("MiniUnz 1.1, demo of zLib + Unz package written by Gilles Vollant\n");
+    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");
 }

@@ -356,20 +356,6 @@ static int do_extract_currentfile(unzFile uf, const int* popt_extract_without_pa
        else
            write_filename = filename_withoutpath;

-        if (write_filename[0]!='\0')
-        {
-            const char* relative_check = write_filename;
-            while (relative_check[1]!='\0')
-            {
-                if (relative_check[0]=='.' && relative_check[1]=='.')
-                    write_filename = relative_check;
-                relative_check++;
-            }
-        }
-
-        while (write_filename[0]=='/' || write_filename[0]=='.')
-            write_filename++;
-
        err = unzOpenCurrentFilePassword(uf,password);
        if (err!=UNZ_OK)
        {
@@ -117,7 +117,7 @@
 const char unz_copyright[] =
   " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";

-/* unz_file_info64_internal contain internal info about a file in zipfile*/
+/* unz_file_info_interntal contain internal info about a file in zipfile*/
 typedef struct unz_file_info64_internal_s
 {
    ZPOS64_T offset_curfile;/* relative offset of local header 8 bytes */
@@ -450,7 +450,7 @@ local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
    if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
        return CENTRALDIRINVALID;

-    /* number of the disk with the start of the zip64 end of central directory */
+    /* number of the disk with the start of the zip64 end of  central directory */
    if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
        return CENTRALDIRINVALID;
    if (uL != 0)
@@ -497,9 +497,9 @@ local unzFile unzOpenInternal(const void *path,
    ZPOS64_T central_pos;
    uLong   uL;

-    uLong number_disk;          /* number of the current disk, used for
+    uLong number_disk;          /* number of the current dist, used for
                                   spanning ZIP, unsupported, always 0*/
-    uLong number_disk_with_CD;  /* number the disk with central dir, used
+    uLong number_disk_with_CD;  /* number the the disk with central dir, used
                                   for spanning ZIP, unsupported, always 0*/
    ZPOS64_T number_entry_CD;      /* total number of entries in
                                   the central dir
@@ -306,7 +306,7 @@ extern int ZEXPORT unzGetCurrentFileInfo(unzFile file,
  Get Info about the current file
  if pfile_info!=NULL, the *pfile_info structure will contain some info about
        the current file
-  if szFileName!=NULL, the filename string will be copied in szFileName
+  if szFileName!=NULL, the filemane string will be copied in szFileName
            (fileNameBufferSize is the size of the buffer)
  if extraField!=NULL, the extra field information will be copied in extraField
            (extraFieldBufferSize is the size of the buffer).
@@ -575,7 +575,7 @@ local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib
  if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
    return 0;

-  /* number of the disk with the start of the zip64 end of central directory */
+  /* number of the disk with the start of the zip64 end of  central directory */
  if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
    return 0;
  if (uL != 0)
@@ -614,9 +614,9 @@ local int LoadCentralDirectoryRecord(zip64_internal* pziinit) {
  ZPOS64_T central_pos;
  uLong uL;

-  uLong number_disk;          /* number of the current disk, used for
+  uLong number_disk;          /* number of the current dist, used for
                              spanning ZIP, unsupported, always 0*/
-  uLong number_disk_with_CD;  /* number of the disk with central dir, used
+  uLong number_disk_with_CD;  /* number the the disk with central dir, used
                              for spanning ZIP, unsupported, always 0*/
  ZPOS64_T number_entry;
  ZPOS64_T number_entry_CD;      /* total number of entries in
@@ -1043,17 +1043,6 @@ extern int ZEXPORT zipOpenNewFileInZip4_64(zipFile file, const char* filename, c
      return ZIP_PARAMERROR;
 #endif

-    // The filename and comment length must fit in 16 bits.
-    if ((filename!=NULL) && (strlen(filename)>0xffff))
-        return ZIP_PARAMERROR;
-    if ((comment!=NULL) && (strlen(comment)>0xffff))
-        return ZIP_PARAMERROR;
-    // The extra field length must fit in 16 bits. If the member also requires
-    // a Zip64 extra block, that will also need to fit within that 16-bit
-    // length, but that will be checked for later.
-    if ((size_extrafield_local>0xffff) || (size_extrafield_global>0xffff))
-        return ZIP_PARAMERROR;
-
    zi = (zip64_internal*)file;

    if (zi->in_opened_file_inzip == 1)
@@ -1608,7 +1597,7 @@ extern int ZEXPORT zipCloseFileInZipRaw64(zipFile file, ZPOS64_T uncompressed_si

      if((uLong)(datasize + 4) > zi->ci.size_centralExtraFree)
      {
-        // we cannot write more data to the buffer that we have room for.
+        // we can not write more data to the buffer that we have room for.
        return ZIP_BADZIPFILE;
      }

@@ -1872,7 +1861,7 @@ extern int ZEXPORT zipClose(zipFile file, const char* global_comment) {
    free_linkedlist(&(zi->central_dir));

    pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
-    if(pos >= 0xffffffff || zi->number_entry >= 0xFFFF)
+    if(pos >= 0xffffffff || zi->number_entry > 0xFFFF)
    {
      ZPOS64_T Zip64EOCDpos = ZTELL64(zi->z_filefunc,zi->filestream);
      Write_Zip64EndOfCentralDirectoryRecord(zi, size_centraldir, centraldir_pos_inzip);
@@ -177,9 +177,9 @@ extern int ZEXPORT zipOpenNewFileInZip64(zipFile file,
  filename : the filename in zip (if NULL, '-' without quote will be used
  *zipfi contain supplemental information
  if extrafield_local!=NULL and size_extrafield_local>0, extrafield_local
-    contains the extrafield data for the local header
+    contains the extrafield data the the local header
  if extrafield_global!=NULL and size_extrafield_global>0, extrafield_global
-    contains the extrafield data for the global header
+    contains the extrafield data the the local header
  if comment != NULL, comment contain the comment string
  method contain the compression method (0 for store, Z_DEFLATED for deflate)
  level contain the level of compression (can be Z_DEFAULT_COMPRESSION)
@@ -1,43 +0,0 @@
-<Project Sdk="Microsoft.Build.NoTargets/3.5.6">
-
-  <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
-    <PackageId>madler.zlib.redist</PackageId>
-    <PackageId Condition="$([MSBuild]::IsOSPlatform('Windows'))">$(PackageId).win</PackageId>
-    <PackageId Condition="$([MSBuild]::IsOSPlatform('Linux'))">$(PackageId).linux</PackageId>
-    <PackageId Condition="$([MSBuild]::IsOSPlatform('OSX'))">$(PackageId).osx</PackageId>
-    <Copyright>(C) 1995-2024 Jean-loup Gailly and Mark Adler</Copyright>
-    <version>1.3.1</version>
-    <PackageDescription>NuGet Package for consuming native builds of zlib into .NET without complexity.</PackageDescription>
-    <!--
-        Warns about not having any lib or ref assemblies (.NET Assemblies) in those directories.
-        Native only packages that is to be consumed in .NET should not require these.
-    -->
-    <NoWarn>NU5128</NoWarn>
-    <PackageOutputPath>$(MSBuildProjectDirectory)</PackageOutputPath>
-    <Authors>Jean-loup Gailly and Mark Adler</Authors>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <None Include="../../LICENSE" Pack="true" PackagePath="" />
-    <!-- Package up Windows builds. -->
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/x86/ZlibDll$(Configuration)/zlibwapi.dll" Pack="true" PackagePath="runtimes/win-x86/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/x64/ZlibDll$(Configuration)/zlibwapi.dll" Pack="true" PackagePath="runtimes/win-x64/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/arm/ZlibDll$(Configuration)/zlibwapi.dll" Pack="true" PackagePath="runtimes/win-arm/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/arm64/ZlibDll$(Configuration)/zlibwapi.dll" Pack="true" PackagePath="runtimes/win-arm64/native" />
-    <!-- Include debug symbols as well as we never know if they might actually be needed in the future. -->
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/x86/ZlibDll$(Configuration)/zlibwapi.pdb" Pack="true" PackagePath="runtimes/win-x86/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/x64/ZlibDll$(Configuration)/zlibwapi.pdb" Pack="true" PackagePath="runtimes/win-x64/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/arm/ZlibDll$(Configuration)/zlibwapi.pdb" Pack="true" PackagePath="runtimes/win-arm/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="../vstudio/vc17/arm64/ZlibDll$(Configuration)/zlibwapi.pdb" Pack="true" PackagePath="runtimes/win-arm64/native" />
-    <!-- Package up Linux builds. -->
-    <None Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="./linux-x86/libz.so" Pack="true" PackagePath="runtimes/linux-x86/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="./linux-x64/libz.so" Pack="true" PackagePath="runtimes/linux-x64/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="./linux-arm/libz.so" Pack="true" PackagePath="runtimes/linux-arm/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="./linux-arm64/libz.so" Pack="true" PackagePath="runtimes/linux-arm64/native" />
-    <!-- Package up MacOS builds. -->
-    <None Condition="$([MSBuild]::IsOSPlatform('OSX'))" Include="./osx-x64/libz.dylib" Pack="true" PackagePath="runtimes/osx-x64/native" />
-    <None Condition="$([MSBuild]::IsOSPlatform('OSX'))" Include="./osx-arm64/libz.dylib" Pack="true" PackagePath="runtimes/osx-arm64/native" />
-  </ItemGroup>
-
-</Project>
@@ -1,22 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.31903.59
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "nuget", "nuget.csproj", "{B1BD3984-EF8F-4E9D-9A94-EB784E5EB1E8}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{B1BD3984-EF8F-4E9D-9A94-EB784E5EB1E8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{B1BD3984-EF8F-4E9D-9A94-EB784E5EB1E8}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B1BD3984-EF8F-4E9D-9A94-EB784E5EB1E8}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B1BD3984-EF8F-4E9D-9A94-EB784E5EB1E8}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-EndGlobal
@@ -10,7 +10,7 @@ unit zlibpas;
 interface

 const
-  ZLIB_VERSION = '1.3.1';
+  ZLIB_VERSION = '1.3.0';
  ZLIB_VERNUM  = $12a0;

 type
@@ -593,10 +593,10 @@ local int fixed(struct state *s)
 *   provided for each of the literal/length symbols, and for each of the
 *   distance symbols.
 *
- * - If a symbol is not used in the block, this is represented by a zero as the
- *   code length.  This does not mean a zero-length code, but rather that no
- *   code should be created for this symbol.  There is no way in the deflate
- *   format to represent a zero-length code.
+ * - If a symbol is not used in the block, this is represented by a zero as
+ *   as the code length.  This does not mean a zero-length code, but rather
+ *   that no code should be created for this symbol.  There is no way in the
+ *   deflate format to represent a zero-length code.
 *
 * - The maximum number of bits in a code is 15, so the possible lengths for
 *   any code are 1..15.
@@ -1,81 +1,75 @@
-Building instructions for the DLL versions of Zlib 1.3.1
-========================================================
-
-This directory contains projects that build zlib and minizip using
-Microsoft Visual C++ 9.0/10.0.
-
-You don't need to build these projects yourself. You can download the
-binaries from:
-  http://www.winimage.com/zLibDll
-
-More information can be found at this site.
-
-
-
-
-
-Build instructions for Visual Studio 2008 (32 bits or 64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc9\zlibvc.sln with Microsoft Visual C++ 2008
- Or run: vcbuild /rebuild contrib\vstudio\vc9\zlibvc.sln "Release|Win32"
-
-Build instructions for Visual Studio 2010 (32 bits or 64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc10\zlibvc.sln with Microsoft Visual C++ 2010
-
-Build instructions for Visual Studio 2012 (32 bits or 64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc11\zlibvc.sln with Microsoft Visual C++ 2012
-
-Build instructions for Visual Studio 2013 (32 bits or 64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc12\zlibvc.sln with Microsoft Visual C++ 2013
-
-Build instructions for Visual Studio 2015 (32 bits or 64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc14\zlibvc.sln with Microsoft Visual C++ 2015
-
-Build instructions for Visual Studio 2022 (64 bits)
--------------------------------------------------------------
- Decompress current zlib, including all contrib/* files
- Open contrib\vstudio\vc143\zlibvc.sln with Microsoft Visual C++ 2022
-
-
-
-Important
---------
- To use zlibwapi.dll in your application, you must define the
-  macro ZLIB_WINAPI when compiling your application's source files.
-
-
-Additional notes
----------------
- This DLL, named zlibwapi.dll, is compatible to the old zlib.dll built
-  by Gilles Vollant from the zlib 1.1.x sources, and distributed at
-    http://www.winimage.com/zLibDll
-  It uses the WINAPI calling convention for the exported functions, and
-  includes the minizip functionality. If your application needs that
-  particular build of zlib.dll, you can rename zlibwapi.dll to zlib.dll.
-
- The new DLL was renamed because there exist several incompatible
-  versions of zlib.dll on the Internet.
-
- There is also an official DLL build of zlib, named zlib1.dll. This one
-  is exporting the functions using the CDECL convention. See the file
-  win32\DLL_FAQ.txt found in this zlib distribution.
-
- There used to be a ZLIB_DLL macro in zlib 1.1.x, but now this symbol
-  has a slightly different effect. To avoid compatibility problems, do
-  not define it here.
-
-
-Gilles Vollant
-info@winimage.com
-
-Visual Studio 2013, 2015, and 2022 Projects from Sean Hunt
-seandhunt_7@yahoo.com
+Building instructions for the DLL versions of Zlib 1.3.0
+========================================================
+
+This directory contains projects that build zlib and minizip using
+Microsoft Visual C++ 9.0/10.0.
+
+You don't need to build these projects yourself. You can download the
+binaries from:
+  http://www.winimage.com/zLibDll
+
+More information can be found at this site.
+
+
+
+
+
+Build instructions for Visual Studio 2008 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc9\zlibvc.sln with Microsoft Visual C++ 2008
+- Or run: vcbuild /rebuild contrib\vstudio\vc9\zlibvc.sln "Release|Win32"
+
+Build instructions for Visual Studio 2010 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc10\zlibvc.sln with Microsoft Visual C++ 2010
+
+Build instructions for Visual Studio 2012 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc11\zlibvc.sln with Microsoft Visual C++ 2012
+
+Build instructions for Visual Studio 2013 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc12\zlibvc.sln with Microsoft Visual C++ 2013
+
+Build instructions for Visual Studio 2015 (32 bits or 64 bits)
+--------------------------------------------------------------
+- Decompress current zlib, including all contrib/* files
+- Open contrib\vstudio\vc14\zlibvc.sln with Microsoft Visual C++ 2015
+
+
+Important
+---------
+- To use zlibwapi.dll in your application, you must define the
+  macro ZLIB_WINAPI when compiling your application's source files.
+
+
+Additional notes
+----------------
+- This DLL, named zlibwapi.dll, is compatible to the old zlib.dll built
+  by Gilles Vollant from the zlib 1.1.x sources, and distributed at
+    http://www.winimage.com/zLibDll
+  It uses the WINAPI calling convention for the exported functions, and
+  includes the minizip functionality. If your application needs that
+  particular build of zlib.dll, you can rename zlibwapi.dll to zlib.dll.
+
+- The new DLL was renamed because there exist several incompatible
+  versions of zlib.dll on the Internet.
+
+- There is also an official DLL build of zlib, named zlib1.dll. This one
+  is exporting the functions using the CDECL convention. See the file
+  win32\DLL_FAQ.txt found in this zlib distribution.
+
+- There used to be a ZLIB_DLL macro in zlib 1.1.x, but now this symbol
+  has a slightly different effect. To avoid compatibility problems, do
+  not define it here.
+
+
+Gilles Vollant
+info@winimage.com
+
+Visual Studio 2013 and 2015 Projects from Sean Hunt
+seandhunt_7@yahoo.com
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 3, 1, 0
-  PRODUCTVERSION 1, 3, 1, 0
+  FILEVERSION	 1, 3, 0, 0
+  PRODUCTVERSION 1, 3, 0, 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",	"1.3.1\0"
+      VALUE "FileVersion",	"1.3.0\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) 1995-2024 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2023 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.3.1
+VERSION		1.3

 EXPORTS
        adler32                                  @1
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 3, 1, 0
-  PRODUCTVERSION 1, 3, 1, 0
+  FILEVERSION	 1, 3, 0, 0
+  PRODUCTVERSION 1, 3, 0, 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",	"1.3.1\0"
+      VALUE "FileVersion",	"1.3.0\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) 1995-2024 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2023 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.3.1
+VERSION		1.3

 EXPORTS
        adler32                                  @1
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 3, 1, 0
-  PRODUCTVERSION 1, 3, 1, 0
+  FILEVERSION	 1, 3, 0, 0
+  PRODUCTVERSION 1, 3, 0, 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",	"1.3.1\0"
+      VALUE "FileVersion",	"1.3.0\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) 1995-2024 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2023 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.3.1
+VERSION		1.3

 EXPORTS
        adler32                                  @1
@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 3, 1, 0
-  PRODUCTVERSION 1, 3, 1, 0
+  FILEVERSION	 1, 3, 0, 0
+  PRODUCTVERSION 1, 3, 0, 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",	"1.3.1\0"
+      VALUE "FileVersion",	"1.3.0\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) 1995-2024 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2023 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.3.1
+VERSION		1.3

 EXPORTS
        adler32                                  @1
@@ -1,409 +0,0 @@
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-  PRODUCTVERSION 1, 3, 1, 0
-  FILEFLAGSMASK	VS_FFI_FILEFLAGSMASK
-  FILEFLAGS	0
-  FILEOS	VOS_DOS_WINDOWS32
-  FILETYPE	VFT_DLL
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-  BEGIN
-    BLOCK "040904E4"
-    //language ID = U.S. English, char set = Windows, Multilingual
-
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-      VALUE "OriginalFilename",	"zlibwapi.dll\0"
-      VALUE "ProductName",	"ZLib.DLL\0"
-      VALUE "Comments","DLL support by Alessandro Iacopetti & Gilles Vollant\0"
-      VALUE "LegalCopyright", "(C) 1995-2024 Jean-loup Gailly & Mark Adler\0"
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-  BEGIN
-    VALUE "Translation", 0x0409, 1252
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-LIBRARY
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-
-VERSION		1.3.1
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-EXPORTS
-        adler32                                  @1
-        compress                                 @2
-        crc32                                    @3
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-        zlibCompileFlags                         @50
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-
-        unzOpen                                  @61
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-
-        zipOpen                                  @80
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-
-        unzGetFilePos                            @100
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-
-        fill_win32_filefunc                      @110
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-; zlibwapi v1.2.4 added:
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-        unzOpen64                               @120
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-
-        zipOpen64                               @130
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-        zipOpenNewFileInZip3_64                 @134
-        zipOpenNewFileInZip4_64                 @135
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-
-; zlib1 v1.2.4 added:
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-        deflateSetHeader                        @144
-        deflateTune                             @145
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-        gzclose_r                               @147
-        gzclose_w                               @148
-        gzdirect                                @149
-        gzoffset                                @150
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-        inflateMark                             @157
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-        inflateUndermine                        @160
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-; zlib1 v1.2.6 added:
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-; zlib1 v1.2.7 added:
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-; zlib1 v1.2.8 added:
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-; zlib1 v1.2.9 added:
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-; zlib1 v1.2.12 added:
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-		crc32_combine_gen64						@177
-		crc32_combine_op						@178
@@ -1,179 +0,0 @@
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-    <ResourceCompile Include="zlib.rc" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="zlibvc.def" />
-  </ItemGroup>
-  <ItemGroup>
-    <ClInclude Include="..\..\..\deflate.h" />
-    <ClInclude Include="..\..\..\infblock.h" />
-    <ClInclude Include="..\..\..\infcodes.h" />
-    <ClInclude Include="..\..\..\inffast.h" />
-    <ClInclude Include="..\..\..\inftrees.h" />
-    <ClInclude Include="..\..\..\infutil.h" />
-    <ClInclude Include="..\..\..\zconf.h" />
-    <ClInclude Include="..\..\..\zlib.h" />
-    <ClInclude Include="..\..\..\zutil.h" />
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@@ -2,8 +2,8 @@

 #define IDR_VERSION1  1
 IDR_VERSION1	VERSIONINFO	MOVEABLE IMPURE LOADONCALL DISCARDABLE
-  FILEVERSION	 1, 3, 1, 0
-  PRODUCTVERSION 1, 3, 1, 0
+  FILEVERSION	 1, 3, 0, 0
+  PRODUCTVERSION 1, 3, 0, 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",	"1.3.1\0"
+      VALUE "FileVersion",	"1.3.0\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) 1995-2024 Jean-loup Gailly & Mark Adler\0"
+      VALUE "LegalCopyright", "(C) 1995-2023 Jean-loup Gailly & Mark Adler\0"
    END
  END
  BLOCK "VarFileInfo"
@@ -1,7 +1,7 @@
 LIBRARY
 ; zlib data compression and ZIP file I/O library

-VERSION		1.3.1
+VERSION		1.3

 EXPORTS
        adler32                                  @1
@@ -1,5 +1,5 @@
 /* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -52,7 +52,7 @@
 #include "deflate.h"

 const char deflate_copyright[] =
-   " deflate 1.3.1 Copyright 1995-2024 Jean-loup Gailly and Mark Adler ";
+   " deflate 1.3 Copyright 1995-2023 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
@@ -493,7 +493,7 @@ int ZEXPORT deflateInit2_(z_streamp strm, int level, int method,
     * symbols from which it is being constructed.
     */

-    s->pending_buf = (uchf *) ZALLOC(strm, s->lit_bufsize, LIT_BUFS);
+    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 ||
@@ -503,14 +503,8 @@ int ZEXPORT deflateInit2_(z_streamp strm, int level, int method,
        deflateEnd (strm);
        return Z_MEM_ERROR;
    }
-#ifdef LIT_MEM
-    s->d_buf = (ushf *)(s->pending_buf + (s->lit_bufsize << 1));
-    s->l_buf = s->pending_buf + (s->lit_bufsize << 2);
-    s->sym_end = s->lit_bufsize - 1;
-#else
    s->sym_buf = s->pending_buf + s->lit_bufsize;
    s->sym_end = (s->lit_bufsize - 1) * 3;
-#endif
    /* 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.
@@ -726,15 +720,9 @@ int ZEXPORT deflatePrime(z_streamp strm, int bits, int value) {

    if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
    s = strm->state;
-#ifdef LIT_MEM
-    if (bits < 0 || bits > 16 ||
-        (uchf *)s->d_buf < s->pending_out + ((Buf_size + 7) >> 3))
-        return Z_BUF_ERROR;
-#else
    if (bits < 0 || bits > 16 ||
        s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
        return Z_BUF_ERROR;
-#endif
    do {
        put = Buf_size - s->bi_valid;
        if (put > bits)
@@ -1306,7 +1294,7 @@ int ZEXPORT deflateCopy(z_streamp dest, z_streamp 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));
-    ds->pending_buf = (uchf *) ZALLOC(dest, ds->lit_bufsize, LIT_BUFS);
+    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) {
@@ -1317,15 +1305,10 @@ int ZEXPORT deflateCopy(z_streamp dest, z_streamp source) {
    zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
    zmemcpy((voidpf)ds->prev, (voidpf)ss->prev, ds->w_size * sizeof(Pos));
    zmemcpy((voidpf)ds->head, (voidpf)ss->head, ds->hash_size * sizeof(Pos));
-    zmemcpy(ds->pending_buf, ss->pending_buf, ds->lit_bufsize * LIT_BUFS);
+    zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);

    ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
-#ifdef LIT_MEM
-    ds->d_buf = (ushf *)(ds->pending_buf + (ds->lit_bufsize << 1));
-    ds->l_buf = ds->pending_buf + (ds->lit_bufsize << 2);
-#else
    ds->sym_buf = ds->pending_buf + ds->lit_bufsize;
-#endif

    ds->l_desc.dyn_tree = ds->dyn_ltree;
    ds->d_desc.dyn_tree = ds->dyn_dtree;
@@ -1556,21 +1539,13 @@ local uInt longest_match(deflate_state *s, IPos cur_match) {
 */
 local void check_match(deflate_state *s, IPos start, IPos match, int length) {
    /* check that the match is indeed a match */
-    Bytef *back = s->window + (int)match, *here = s->window + start;
-    IPos len = length;
-    if (match == (IPos)-1) {
-        /* match starts one byte before the current window -- just compare the
-           subsequent length-1 bytes */
-        back++;
-        here++;
-        len--;
-    }
-    if (zmemcmp(back, here, len) != EQUAL) {
-        fprintf(stderr, " start %u, match %d, length %d\n",
-                start, (int)match, length);
+    if (zmemcmp(s->window + match,
+                s->window + start, length) != EQUAL) {
+        fprintf(stderr, " start %u, match %u, length %d\n",
+                start, match, length);
        do {
-            fprintf(stderr, "(%02x %02x)", *back++, *here++);
-        } while (--len != 0);
+            fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+        } while (--length != 0);
        z_error("invalid match");
    }
    if (z_verbose > 1) {
@@ -1,5 +1,5 @@
 /* deflate.h -- internal compression state
- * Copyright (C) 1995-2024 Jean-loup Gailly
+ * Copyright (C) 1995-2018 Jean-loup Gailly
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -23,10 +23,6 @@
 #  define GZIP
 #endif

-/* define LIT_MEM to slightly increase the speed of deflate (order 1% to 2%) at
-   the cost of a larger memory footprint */
-/* #define LIT_MEM */
-
 /* ===========================================================================
 * Internal compression state.
 */
@@ -221,14 +217,7 @@ typedef struct internal_state {
    /* Depth of each subtree used as tie breaker for trees of equal frequency
     */

-#ifdef LIT_MEM
-#   define LIT_BUFS 5
-    ushf *d_buf;          /* buffer for distances */
-    uchf *l_buf;          /* buffer for literals/lengths */
-#else
-#   define LIT_BUFS 4
    uchf *sym_buf;        /* buffer for distances and literals/lengths */
-#endif

    uInt  lit_bufsize;
    /* Size of match buffer for literals/lengths.  There are 4 reasons for
@@ -250,7 +239,7 @@ typedef struct internal_state {
     *   - I can't count above 4
     */

-    uInt sym_next;      /* running index in symbol buffer */
+    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 */
@@ -329,25 +318,6 @@ void ZLIB_INTERNAL _tr_stored_block(deflate_state *s, charf *buf,
  extern const uch ZLIB_INTERNAL _dist_code[];
 #endif

-#ifdef LIT_MEM
-# define _tr_tally_lit(s, c, flush) \
-  { uch cc = (c); \
-    s->d_buf[s->sym_next] = 0; \
-    s->l_buf[s->sym_next++] = cc; \
-    s->dyn_ltree[cc].Freq++; \
-    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->sym_next] = dist; \
-    s->l_buf[s->sym_next++] = len; \
-    dist--; \
-    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
-    s->dyn_dtree[d_code(dist)].Freq++; \
-    flush = (s->sym_next == s->sym_end); \
-  }
-#else
 # define _tr_tally_lit(s, c, flush) \
  { uch cc = (c); \
    s->sym_buf[s->sym_next++] = 0; \
@@ -367,7 +337,6 @@ void ZLIB_INTERNAL _tr_stored_block(deflate_state *s, charf *buf,
    s->dyn_dtree[d_code(dist)].Freq++; \
    flush = (s->sym_next == s->sym_end); \
  }
-#endif
 #else
 # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
 # define _tr_tally_dist(s, distance, length, flush) \
@@ -1,209 +0,0 @@
-1. Compression algorithm (deflate)
-
-The deflation algorithm used by gzip (also zip and zlib) is a variation of
-LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
-the input data.  The second occurrence of a string is replaced by a
-pointer to the previous string, in the form of a pair (distance,
-length).  Distances are limited to 32K bytes, and lengths are limited
-to 258 bytes. When a string does not occur anywhere in the previous
-32K bytes, it is emitted as a sequence of literal bytes.  (In this
-description, `string' must be taken as an arbitrary sequence of bytes,
-and is not restricted to printable characters.)
-
-Literals or match lengths are compressed with one Huffman tree, and
-match distances are compressed with another tree. The trees are stored
-in a compact form at the start of each block. The blocks can have any
-size (except that the compressed data for one block must fit in
-available memory). A block is terminated when deflate() determines that
-it would be useful to start another block with fresh trees. (This is
-somewhat similar to the behavior of LZW-based _compress_.)
-
-Duplicated strings are found using a hash table. All input strings of
-length 3 are inserted in the hash table. A hash index is computed for
-the next 3 bytes. If the hash chain for this index is not empty, all
-strings in the chain are compared with the current input string, and
-the longest match is selected.
-
-The hash chains are searched starting with the most recent strings, to
-favor small distances and thus take advantage of the Huffman encoding.
-The hash chains are singly linked. There are no deletions from the
-hash chains, the algorithm simply discards matches that are too old.
-
-To avoid a worst-case situation, very long hash chains are arbitrarily
-truncated at a certain length, determined by a runtime option (level
-parameter of deflateInit). So deflate() does not always find the longest
-possible match but generally finds a match which is long enough.
-
-deflate() also defers the selection of matches with a lazy evaluation
-mechanism. After a match of length N has been found, deflate() searches for
-a longer match at the next input byte. If a longer match is found, the
-previous match is truncated to a length of one (thus producing a single
-literal byte) and the process of lazy evaluation begins again. Otherwise,
-the original match is kept, and the next match search is attempted only N
-steps later.
-
-The lazy match evaluation is also subject to a runtime parameter. If
-the current match is long enough, deflate() reduces the search for a longer
-match, thus speeding up the whole process. If compression ratio is more
-important than speed, deflate() attempts a complete second search even if
-the first match is already long enough.
-
-The lazy match evaluation is not performed for the fastest compression
-modes (level parameter 1 to 3). For these fast modes, new strings
-are inserted in the hash table only when no match was found, or
-when the match is not too long. This degrades the compression ratio
-but saves time since there are both fewer insertions and fewer searches.
-
-
-2. Decompression algorithm (inflate)
-
-2.1 Introduction
-
-The key question is how to represent a Huffman code (or any prefix code) so
-that you can decode fast.  The most important characteristic is that shorter
-codes are much more common than longer codes, so pay attention to decoding the
-short codes fast, and let the long codes take longer to decode.
-
-inflate() sets up a first level table that covers some number of bits of
-input less than the length of longest code.  It gets that many bits from the
-stream, and looks it up in the table.  The table will tell if the next
-code is that many bits or less and how many, and if it is, it will tell
-the value, else it will point to the next level table for which inflate()
-grabs more bits and tries to decode a longer code.
-
-How many bits to make the first lookup is a tradeoff between the time it
-takes to decode and the time it takes to build the table.  If building the
-table took no time (and if you had infinite memory), then there would only
-be a first level table to cover all the way to the longest code.  However,
-building the table ends up taking a lot longer for more bits since short
-codes are replicated many times in such a table.  What inflate() does is
-simply to make the number of bits in the first table a variable, and then
-to set that variable for the maximum speed.
-
-For inflate, which has 286 possible codes for the literal/length tree, the size
-of the first table is nine bits.  Also the distance trees have 30 possible
-values, and the size of the first table is six bits.  Note that for each of
-those cases, the table ended up one bit longer than the ``average'' code
-length, i.e. the code length of an approximately flat code which would be a
-little more than eight bits for 286 symbols and a little less than five bits
-for 30 symbols.
-
-
-2.2 More details on the inflate table lookup
-
-Ok, you want to know what this cleverly obfuscated inflate tree actually
-looks like.  You are correct that it's not a Huffman tree.  It is simply a
-lookup table for the first, let's say, nine bits of a Huffman symbol.  The
-symbol could be as short as one bit or as long as 15 bits.  If a particular
-symbol is shorter than nine bits, then that symbol's translation is duplicated
-in all those entries that start with that symbol's bits.  For example, if the
-symbol is four bits, then it's duplicated 32 times in a nine-bit table.  If a
-symbol is nine bits long, it appears in the table once.
-
-If the symbol is longer than nine bits, then that entry in the table points
-to another similar table for the remaining bits.  Again, there are duplicated
-entries as needed.  The idea is that most of the time the symbol will be short
-and there will only be one table look up.  (That's whole idea behind data
-compression in the first place.)  For the less frequent long symbols, there
-will be two lookups.  If you had a compression method with really long
-symbols, you could have as many levels of lookups as is efficient.  For
-inflate, two is enough.
-
-So a table entry either points to another table (in which case nine bits in
-the above example are gobbled), or it contains the translation for the symbol
-and the number of bits to gobble.  Then you start again with the next
-ungobbled bit.
-
-You may wonder: why not just have one lookup table for how ever many bits the
-longest symbol is?  The reason is that if you do that, you end up spending
-more time filling in duplicate symbol entries than you do actually decoding.
-At least for deflate's output that generates new trees every several 10's of
-kbytes.  You can imagine that filling in a 2^15 entry table for a 15-bit code
-would take too long if you're only decoding several thousand symbols.  At the
-other extreme, you could make a new table for every bit in the code.  In fact,
-that's essentially a Huffman tree.  But then you spend too much time
-traversing the tree while decoding, even for short symbols.
-
-So the number of bits for the first lookup table is a trade of the time to
-fill out the table vs. the time spent looking at the second level and above of
-the table.
-
-Here is an example, scaled down:
-
-The code being decoded, with 10 symbols, from 1 to 6 bits long:
-
-A: 0
-B: 10
-C: 1100
-D: 11010
-E: 11011
-F: 11100
-G: 11101
-H: 11110
-I: 111110
-J: 111111
-
-Let's make the first table three bits long (eight entries):
-
-000: A,1
-001: A,1
-010: A,1
-011: A,1
-100: B,2
-101: B,2
-110: -> table X (gobble 3 bits)
-111: -> table Y (gobble 3 bits)
-
-Each entry is what the bits decode as and how many bits that is, i.e. how
-many bits to gobble.  Or the entry points to another table, with the number of
-bits to gobble implicit in the size of the table.
-
-Table X is two bits long since the longest code starting with 110 is five bits
-long:
-
-00: C,1
-01: C,1
-10: D,2
-11: E,2
-
-Table Y is three bits long since the longest code starting with 111 is six
-bits long:
-
-000: F,2
-001: F,2
-010: G,2
-011: G,2
-100: H,2
-101: H,2
-110: I,3
-111: J,3
-
-So what we have here are three tables with a total of 20 entries that had to
-be constructed.  That's compared to 64 entries for a single table.  Or
-compared to 16 entries for a Huffman tree (six two entry tables and one four
-entry table).  Assuming that the code ideally represents the probability of
-the symbols, it takes on the average 1.25 lookups per symbol.  That's compared
-to one lookup for the single table, or 1.66 lookups per symbol for the
-Huffman tree.
-
-There, I think that gives you a picture of what's going on.  For inflate, the
-meaning of a particular symbol is often more than just a letter.  It can be a
-byte (a "literal"), or it can be either a length or a distance which
-indicates a base value and a number of bits to fetch after the code that is
-added to the base value.  Or it might be the special end-of-block code.  The
-data structures created in inftrees.c try to encode all that information
-compactly in the tables.
-
-
-Jean-loup Gailly        Mark Adler
-jloup@gzip.org          madler@alumni.caltech.edu
-
-
-References:
-
-[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
-Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
-pp. 337-343.
-
-``DEFLATE Compressed Data Format Specification'' available in
-http://tools.ietf.org/html/rfc1951
@@ -1,619 +0,0 @@
-
-
-
-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1950                           Aladdin Enterprises
-Category: Informational                                      J-L. Gailly
-                                                                Info-ZIP
-                                                                May 1996
-
-
-         ZLIB Compressed Data Format Specification version 3.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch and Jean-Loup Gailly
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format.  The
-   data can be produced or consumed, even for an arbitrarily long
-   sequentially presented input data stream, using only an a priori
-   bounded amount of intermediate storage.  The format presently uses
-   the DEFLATE compression method but can be easily extended to use
-   other compression methods.  It can be implemented readily in a manner
-   not covered by patents.  This specification also defines the ADLER-32
-   checksum (an extension and improvement of the Fletcher checksum),
-   used for detection of data corruption, and provides an algorithm for
-   computing it.
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 1]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5.  Definitions of terms and conventions used ................ 3
-      1.6. Changes from previous versions ............................ 3
-   2. Detailed specification ......................................... 3
-      2.1. Overall conventions ....................................... 3
-      2.2. Data format ............................................... 4
-      2.3. Compliance ................................................ 7
-   3. References ..................................................... 7
-   4. Source code .................................................... 8
-   5. Security Considerations ........................................ 8
-   6. Acknowledgements ............................................... 8
-   7. Authors' Addresses ............................................. 8
-   8. Appendix: Rationale ............................................ 9
-   9. Appendix: Sample code ..........................................10
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-
-          * Can be produced or consumed, even for an arbitrarily long
-            sequentially presented input data stream, using only an a
-            priori bounded amount of intermediate storage, and hence can
-            be used in data communications or similar structures such as
-            Unix filters;
-
-          * Can use a number of different compression methods;
-
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely.
-
-      The data format defined by this specification does not attempt to
-      allow random access to compressed data.
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 2]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into zlib format and/or decompress data from zlib
-      format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.
-
-   1.3. Scope
-
-      The specification specifies a compressed data format that can be
-      used for in-memory compression of a sequence of arbitrary bytes.
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any data set that conforms to all
-      the specifications presented here; a compliant compressor must
-      produce data sets that conform to all the specifications presented
-      here.
-
-   1.5.  Definitions of terms and conventions used
-
-      byte: 8 bits stored or transmitted as a unit (same as an octet).
-      (For this specification, a byte is exactly 8 bits, even on
-      machines which store a character on a number of bits different
-      from 8.) See below, for the numbering of bits within a byte.
-
-   1.6. Changes from previous versions
-
-      Version 3.1 was the first public release of this specification.
-      In version 3.2, some terminology was changed and the Adler-32
-      sample code was rewritten for clarity.  In version 3.3, the
-      support for a preset dictionary was introduced, and the
-      specification was converted to RFC style.
-
-2. Detailed specification
-
-   2.1. Overall conventions
-
-      In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 3]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the MOST-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0     1
-         +--------+--------+
-         |00000010|00001000|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + less significant byte = 8
-          + more significant byte = 2 x 256
-
-   2.2. Data format
-
-      A zlib stream has the following structure:
-
-           0   1
-         +---+---+
-         |CMF|FLG|   (more-->)
-         +---+---+
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 4]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      (if FLG.FDICT set)
-
-           0   1   2   3
-         +---+---+---+---+
-         |     DICTID    |   (more-->)
-         +---+---+---+---+
-
-         +=====================+---+---+---+---+
-         |...compressed data...|    ADLER32    |
-         +=====================+---+---+---+---+
-
-      Any data which may appear after ADLER32 are not part of the zlib
-      stream.
-
-      CMF (Compression Method and flags)
-         This byte is divided into a 4-bit compression method and a 4-
-         bit information field depending on the compression method.
-
-            bits 0 to 3  CM     Compression method
-            bits 4 to 7  CINFO  Compression info
-
-      CM (Compression method)
-         This identifies the compression method used in the file. CM = 8
-         denotes the "deflate" compression method with a window size up
-         to 32K.  This is the method used by gzip and PNG (see
-         references [1] and [2] in Chapter 3, below, for the reference
-         documents).  CM = 15 is reserved.  It might be used in a future
-         version of this specification to indicate the presence of an
-         extra field before the compressed data.
-
-      CINFO (Compression info)
-         For CM = 8, CINFO is the base-2 logarithm of the LZ77 window
-         size, minus eight (CINFO=7 indicates a 32K window size). Values
-         of CINFO above 7 are not allowed in this version of the
-         specification.  CINFO is not defined in this specification for
-         CM not equal to 8.
-
-      FLG (FLaGs)
-         This flag byte is divided as follows:
-
-            bits 0 to 4  FCHECK  (check bits for CMF and FLG)
-            bit  5       FDICT   (preset dictionary)
-            bits 6 to 7  FLEVEL  (compression level)
-
-         The FCHECK value must be such that CMF and FLG, when viewed as
-         a 16-bit unsigned integer stored in MSB order (CMF*256 + FLG),
-         is a multiple of 31.
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 5]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      FDICT (Preset dictionary)
-         If FDICT is set, a DICT dictionary identifier is present
-         immediately after the FLG byte. The dictionary is a sequence of
-         bytes which are initially fed to the compressor without
-         producing any compressed output. DICT is the Adler-32 checksum
-         of this sequence of bytes (see the definition of ADLER32
-         below).  The decompressor can use this identifier to determine
-         which dictionary has been used by the compressor.
-
-      FLEVEL (Compression level)
-         These flags are available for use by specific compression
-         methods.  The "deflate" method (CM = 8) sets these flags as
-         follows:
-
-            0 - compressor used fastest algorithm
-            1 - compressor used fast algorithm
-            2 - compressor used default algorithm
-            3 - compressor used maximum compression, slowest algorithm
-
-         The information in FLEVEL is not needed for decompression; it
-         is there to indicate if recompression might be worthwhile.
-
-      compressed data
-         For compression method 8, the compressed data is stored in the
-         deflate compressed data format as described in the document
-         "DEFLATE Compressed Data Format Specification" by L. Peter
-         Deutsch. (See reference [3] in Chapter 3, below)
-
-         Other compressed data formats are not specified in this version
-         of the zlib specification.
-
-      ADLER32 (Adler-32 checksum)
-         This contains a checksum value of the uncompressed data
-         (excluding any dictionary data) computed according to Adler-32
-         algorithm. This algorithm is a 32-bit extension and improvement
-         of the Fletcher algorithm, used in the ITU-T X.224 / ISO 8073
-         standard. See references [4] and [5] in Chapter 3, below)
-
-         Adler-32 is composed of two sums accumulated per byte: s1 is
-         the sum of all bytes, s2 is the sum of all s1 values. Both sums
-         are done modulo 65521. s1 is initialized to 1, s2 to zero.  The
-         Adler-32 checksum is stored as s2*65536 + s1 in most-
-         significant-byte first (network) order.
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 6]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-   2.3. Compliance
-
-      A compliant compressor must produce streams with correct CMF, FLG
-      and ADLER32, but need not support preset dictionaries.  When the
-      zlib data format is used as part of another standard data format,
-      the compressor may use only preset dictionaries that are specified
-      by this other data format.  If this other format does not use the
-      preset dictionary feature, the compressor must not set the FDICT
-      flag.
-
-      A compliant decompressor must check CMF, FLG, and ADLER32, and
-      provide an error indication if any of these have incorrect values.
-      A compliant decompressor must give an error indication if CM is
-      not one of the values defined in this specification (only the
-      value 8 is permitted in this version), since another value could
-      indicate the presence of new features that would cause subsequent
-      data to be interpreted incorrectly.  A compliant decompressor must
-      give an error indication if FDICT is set and DICTID is not the
-      identifier of a known preset dictionary.  A decompressor may
-      ignore FLEVEL and still be compliant.  When the zlib data format
-      is being used as a part of another standard format, a compliant
-      decompressor must support all the preset dictionaries specified by
-      the other format. When the other format does not use the preset
-      dictionary feature, a compliant decompressor must reject any
-      stream in which the FDICT flag is set.
-
-3. References
-
-   [1] Deutsch, L.P.,"GZIP Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [2] Thomas Boutell, "PNG (Portable Network Graphics) specification",
-       available in ftp://ftp.uu.net/graphics/png/documents/
-
-   [3] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [4] Fletcher, J. G., "An Arithmetic Checksum for Serial
-       Transmissions," IEEE Transactions on Communications, Vol. COM-30,
-       No. 1, January 1982, pp. 247-252.
-
-   [5] ITU-T Recommendation X.224, Annex D, "Checksum Algorithms,"
-       November, 1993, pp. 144, 145. (Available from
-       gopher://info.itu.ch). ITU-T X.244 is also the same as ISO 8073.
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 7]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-4. Source code
-
-   Source code for a C language implementation of a "zlib" compliant
-   library is available at ftp://ftp.uu.net/pub/archiving/zip/zlib/.
-
-5. Security Considerations
-
-   A decoder that fails to check the ADLER32 checksum value may be
-   subject to undetected data corruption.
-
-6. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Jean-Loup Gailly and Mark Adler designed the zlib format and wrote
-   the related software described in this specification.  Glenn
-   Randers-Pehrson converted this document to RFC and HTML format.
-
-7. Authors' Addresses
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-
-   Jean-Loup Gailly
-
-   EMail: <gzip@prep.ai.mit.edu>
-
-   Questions about the technical content of this specification can be
-   sent by email to
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 8]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-8. Appendix: Rationale
-
-   8.1. Preset dictionaries
-
-      A preset dictionary is specially useful to compress short input
-      sequences. The compressor can take advantage of the dictionary
-      context to encode the input in a more compact manner. The
-      decompressor can be initialized with the appropriate context by
-      virtually decompressing a compressed version of the dictionary
-      without producing any output. However for certain compression
-      algorithms such as the deflate algorithm this operation can be
-      achieved without actually performing any decompression.
-
-      The compressor and the decompressor must use exactly the same
-      dictionary. The dictionary may be fixed or may be chosen among a
-      certain number of predefined dictionaries, according to the kind
-      of input data. The decompressor can determine which dictionary has
-      been chosen by the compressor by checking the dictionary
-      identifier. This document does not specify the contents of
-      predefined dictionaries, since the optimal dictionaries are
-      application specific. Standard data formats using this feature of
-      the zlib specification must precisely define the allowed
-      dictionaries.
-
-   8.2. The Adler-32 algorithm
-
-      The Adler-32 algorithm is much faster than the CRC32 algorithm yet
-      still provides an extremely low probability of undetected errors.
-
-      The modulo on unsigned long accumulators can be delayed for 5552
-      bytes, so the modulo operation time is negligible.  If the bytes
-      are a, b, c, the second sum is 3a + 2b + c + 3, and so is position
-      and order sensitive, unlike the first sum, which is just a
-      checksum.  That 65521 is prime is important to avoid a possible
-      large class of two-byte errors that leave the check unchanged.
-      (The Fletcher checksum uses 255, which is not prime and which also
-      makes the Fletcher check insensitive to single byte changes 0 <->
-      255.)
-
-      The sum s1 is initialized to 1 instead of zero to make the length
-      of the sequence part of s2, so that the length does not have to be
-      checked separately. (Any sequence of zeroes has a Fletcher
-      checksum of zero.)
-
-
-
-
-
-
-
-
-Deutsch & Gailly             Informational                      [Page 9]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-9. Appendix: Sample code
-
-   The following C code computes the Adler-32 checksum of a data buffer.
-   It is written for clarity, not for speed.  The sample code is in the
-   ANSI C programming language. Non C users may find it easier to read
-   with these hints:
-
-      &      Bitwise AND operator.
-      >>     Bitwise right shift operator. When applied to an
-             unsigned quantity, as here, right shift inserts zero bit(s)
-             at the left.
-      <<     Bitwise left shift operator. Left shift inserts zero
-             bit(s) at the right.
-      ++     "n++" increments the variable n.
-      %      modulo operator: a % b is the remainder of a divided by b.
-
-      #define BASE 65521 /* largest prime smaller than 65536 */
-
-      /*
-         Update a running Adler-32 checksum with the bytes buf[0..len-1]
-       and return the updated checksum. The Adler-32 checksum should be
-       initialized to 1.
-
-       Usage example:
-
-         unsigned long adler = 1L;
-
-         while (read_buffer(buffer, length) != EOF) {
-           adler = update_adler32(adler, buffer, length);
-         }
-         if (adler != original_adler) error();
-      */
-      unsigned long update_adler32(unsigned long adler,
-         unsigned char *buf, int len)
-      {
-        unsigned long s1 = adler & 0xffff;
-        unsigned long s2 = (adler >> 16) & 0xffff;
-        int n;
-
-        for (n = 0; n < len; n++) {
-          s1 = (s1 + buf[n]) % BASE;
-          s2 = (s2 + s1)     % BASE;
-        }
-        return (s2 << 16) + s1;
-      }
-
-      /* Return the adler32 of the bytes buf[0..len-1] */
-
-
-
-
-Deutsch & Gailly             Informational                     [Page 10]
-
-RFC 1950       ZLIB Compressed Data Format Specification        May 1996
-
-
-      unsigned long adler32(unsigned char *buf, int len)
-      {
-        return update_adler32(1L, buf, len);
-      }
-
-
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-Deutsch & Gailly             Informational                     [Page 11]
-
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-
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-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1951                           Aladdin Enterprises
-Category: Informational                                         May 1996
-
-
-        DEFLATE Compressed Data Format Specification version 1.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format that
-   compresses data using a combination of the LZ77 algorithm and Huffman
-   coding, with efficiency comparable to the best currently available
-   general-purpose compression methods.  The data can be produced or
-   consumed, even for an arbitrarily long sequentially presented input
-   data stream, using only an a priori bounded amount of intermediate
-   storage.  The format can be implemented readily in a manner not
-   covered by patents.
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 1]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5.  Definitions of terms and conventions used ................ 3
-      1.6. Changes from previous versions ............................ 4
-   2. Compressed representation overview ............................. 4
-   3. Detailed specification ......................................... 5
-      3.1. Overall conventions ....................................... 5
-          3.1.1. Packing into bytes .................................. 5
-      3.2. Compressed block format ................................... 6
-          3.2.1. Synopsis of prefix and Huffman coding ............... 6
-          3.2.2. Use of Huffman coding in the "deflate" format ....... 7
-          3.2.3. Details of block format ............................. 9
-          3.2.4. Non-compressed blocks (BTYPE=00) ................... 11
-          3.2.5. Compressed blocks (length and distance codes) ...... 11
-          3.2.6. Compression with fixed Huffman codes (BTYPE=01) .... 12
-          3.2.7. Compression with dynamic Huffman codes (BTYPE=10) .. 13
-      3.3. Compliance ............................................... 14
-   4. Compression algorithm details ................................. 14
-   5. References .................................................... 16
-   6. Security Considerations ....................................... 16
-   7. Source code ................................................... 16
-   8. Acknowledgements .............................................. 16
-   9. Author's Address .............................................. 17
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-          * Can be produced or consumed, even for an arbitrarily long
-            sequentially presented input data stream, using only an a
-            priori bounded amount of intermediate storage, and hence
-            can be used in data communications or similar structures
-            such as Unix filters;
-          * Compresses data with efficiency comparable to the best
-            currently available general-purpose compression methods,
-            and in particular considerably better than the "compress"
-            program;
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely;
-
-
-
-Deutsch                      Informational                      [Page 2]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-          * Is compatible with the file format produced by the current
-            widely used gzip utility, in that conforming decompressors
-            will be able to read data produced by the existing gzip
-            compressor.
-
-      The data format defined by this specification does not attempt to:
-
-          * Allow random access to compressed data;
-          * Compress specialized data (e.g., raster graphics) as well
-            as the best currently available specialized algorithms.
-
-      A simple counting argument shows that no lossless compression
-      algorithm can compress every possible input data set.  For the
-      format defined here, the worst case expansion is 5 bytes per 32K-
-      byte block, i.e., a size increase of 0.015% for large data sets.
-      English text usually compresses by a factor of 2.5 to 3;
-      executable files usually compress somewhat less; graphical data
-      such as raster images may compress much more.
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into "deflate" format and/or decompress data from
-      "deflate" format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.  Familiarity with the technique of Huffman coding
-      is helpful but not required.
-
-   1.3. Scope
-
-      The specification specifies a method for representing a sequence
-      of bytes as a (usually shorter) sequence of bits, and a method for
-      packing the latter bit sequence into bytes.
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any data set that conforms to all
-      the specifications presented here; a compliant compressor must
-      produce data sets that conform to all the specifications presented
-      here.
-
-   1.5.  Definitions of terms and conventions used
-
-      Byte: 8 bits stored or transmitted as a unit (same as an octet).
-      For this specification, a byte is exactly 8 bits, even on machines
-
-
-
-Deutsch                      Informational                      [Page 3]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-      which store a character on a number of bits different from eight.
-      See below, for the numbering of bits within a byte.
-
-      String: a sequence of arbitrary bytes.
-
-   1.6. Changes from previous versions
-
-      There have been no technical changes to the deflate format since
-      version 1.1 of this specification.  In version 1.2, some
-      terminology was changed.  Version 1.3 is a conversion of the
-      specification to RFC style.
-
-2. Compressed representation overview
-
-   A compressed data set consists of a series of blocks, corresponding
-   to successive blocks of input data.  The block sizes are arbitrary,
-   except that non-compressible blocks are limited to 65,535 bytes.
-
-   Each block is compressed using a combination of the LZ77 algorithm
-   and Huffman coding. The Huffman trees for each block are independent
-   of those for previous or subsequent blocks; the LZ77 algorithm may
-   use a reference to a duplicated string occurring in a previous block,
-   up to 32K input bytes before.
-
-   Each block consists of two parts: a pair of Huffman code trees that
-   describe the representation of the compressed data part, and a
-   compressed data part.  (The Huffman trees themselves are compressed
-   using Huffman encoding.)  The compressed data consists of a series of
-   elements of two types: literal bytes (of strings that have not been
-   detected as duplicated within the previous 32K input bytes), and
-   pointers to duplicated strings, where a pointer is represented as a
-   pair <length, backward distance>.  The representation used in the
-   "deflate" format limits distances to 32K bytes and lengths to 258
-   bytes, but does not limit the size of a block, except for
-   uncompressible blocks, which are limited as noted above.
-
-   Each type of value (literals, distances, and lengths) in the
-   compressed data is represented using a Huffman code, using one code
-   tree for literals and lengths and a separate code tree for distances.
-   The code trees for each block appear in a compact form just before
-   the compressed data for that block.
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 4]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-3. Detailed specification
-
-   3.1. Overall conventions In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the least-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0        1
-         +--------+--------+
-         |00001000|00000010|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + more significant byte = 2 x 256
-          + less significant byte = 8
-
-      3.1.1. Packing into bytes
-
-         This document does not address the issue of the order in which
-         bits of a byte are transmitted on a bit-sequential medium,
-         since the final data format described here is byte- rather than
-
-
-
-Deutsch                      Informational                      [Page 5]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         bit-oriented.  However, we describe the compressed block format
-         in below, as a sequence of data elements of various bit
-         lengths, not a sequence of bytes.  We must therefore specify
-         how to pack these data elements into bytes to form the final
-         compressed byte sequence:
-
-             * Data elements are packed into bytes in order of
-               increasing bit number within the byte, i.e., starting
-               with the least-significant bit of the byte.
-             * Data elements other than Huffman codes are packed
-               starting with the least-significant bit of the data
-               element.
-             * Huffman codes are packed starting with the most-
-               significant bit of the code.
-
-         In other words, if one were to print out the compressed data as
-         a sequence of bytes, starting with the first byte at the
-         *right* margin and proceeding to the *left*, with the most-
-         significant bit of each byte on the left as usual, one would be
-         able to parse the result from right to left, with fixed-width
-         elements in the correct MSB-to-LSB order and Huffman codes in
-         bit-reversed order (i.e., with the first bit of the code in the
-         relative LSB position).
-
-   3.2. Compressed block format
-
-      3.2.1. Synopsis of prefix and Huffman coding
-
-         Prefix coding represents symbols from an a priori known
-         alphabet by bit sequences (codes), one code for each symbol, in
-         a manner such that different symbols may be represented by bit
-         sequences of different lengths, but a parser can always parse
-         an encoded string unambiguously symbol-by-symbol.
-
-         We define a prefix code in terms of a binary tree in which the
-         two edges descending from each non-leaf node are labeled 0 and
-         1 and in which the leaf nodes correspond one-for-one with (are
-         labeled with) the symbols of the alphabet; then the code for a
-         symbol is the sequence of 0's and 1's on the edges leading from
-         the root to the leaf labeled with that symbol.  For example:
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 6]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                          /\              Symbol    Code
-                         0  1             ------    ----
-                        /    \                A      00
-                       /\     B               B       1
-                      0  1                    C     011
-                     /    \                   D     010
-                    A     /\
-                         0  1
-                        /    \
-                       D      C
-
-         A parser can decode the next symbol from an encoded input
-         stream by walking down the tree from the root, at each step
-         choosing the edge corresponding to the next input bit.
-
-         Given an alphabet with known symbol frequencies, the Huffman
-         algorithm allows the construction of an optimal prefix code
-         (one which represents strings with those symbol frequencies
-         using the fewest bits of any possible prefix codes for that
-         alphabet).  Such a code is called a Huffman code.  (See
-         reference [1] in Chapter 5, references for additional
-         information on Huffman codes.)
-
-         Note that in the "deflate" format, the Huffman codes for the
-         various alphabets must not exceed certain maximum code lengths.
-         This constraint complicates the algorithm for computing code
-         lengths from symbol frequencies.  Again, see Chapter 5,
-         references for details.
-
-      3.2.2. Use of Huffman coding in the "deflate" format
-
-         The Huffman codes used for each alphabet in the "deflate"
-         format have two additional rules:
-
-             * All codes of a given bit length have lexicographically
-               consecutive values, in the same order as the symbols
-               they represent;
-
-             * Shorter codes lexicographically precede longer codes.
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 7]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         We could recode the example above to follow this rule as
-         follows, assuming that the order of the alphabet is ABCD:
-
-            Symbol  Code
-            ------  ----
-            A       10
-            B       0
-            C       110
-            D       111
-
-         I.e., 0 precedes 10 which precedes 11x, and 110 and 111 are
-         lexicographically consecutive.
-
-         Given this rule, we can define the Huffman code for an alphabet
-         just by giving the bit lengths of the codes for each symbol of
-         the alphabet in order; this is sufficient to determine the
-         actual codes.  In our example, the code is completely defined
-         by the sequence of bit lengths (2, 1, 3, 3).  The following
-         algorithm generates the codes as integers, intended to be read
-         from most- to least-significant bit.  The code lengths are
-         initially in tree[I].Len; the codes are produced in
-         tree[I].Code.
-
-         1)  Count the number of codes for each code length.  Let
-             bl_count[N] be the number of codes of length N, N >= 1.
-
-         2)  Find the numerical value of the smallest code for each
-             code length:
-
-                code = 0;
-                bl_count[0] = 0;
-                for (bits = 1; bits <= MAX_BITS; bits++) {
-                    code = (code + bl_count[bits-1]) << 1;
-                    next_code[bits] = code;
-                }
-
-         3)  Assign numerical values to all codes, using consecutive
-             values for all codes of the same length with the base
-             values determined at step 2. Codes that are never used
-             (which have a bit length of zero) must not be assigned a
-             value.
-
-                for (n = 0;  n <= max_code; n++) {
-                    len = tree[n].Len;
-                    if (len != 0) {
-                        tree[n].Code = next_code[len];
-                        next_code[len]++;
-                    }
-
-
-
-Deutsch                      Informational                      [Page 8]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                }
-
-         Example:
-
-         Consider the alphabet ABCDEFGH, with bit lengths (3, 3, 3, 3,
-         3, 2, 4, 4).  After step 1, we have:
-
-            N      bl_count[N]
-            -      -----------
-            2      1
-            3      5
-            4      2
-
-         Step 2 computes the following next_code values:
-
-            N      next_code[N]
-            -      ------------
-            1      0
-            2      0
-            3      2
-            4      14
-
-         Step 3 produces the following code values:
-
-            Symbol Length   Code
-            ------ ------   ----
-            A       3        010
-            B       3        011
-            C       3        100
-            D       3        101
-            E       3        110
-            F       2         00
-            G       4       1110
-            H       4       1111
-
-      3.2.3. Details of block format
-
-         Each block of compressed data begins with 3 header bits
-         containing the following data:
-
-            first bit       BFINAL
-            next 2 bits     BTYPE
-
-         Note that the header bits do not necessarily begin on a byte
-         boundary, since a block does not necessarily occupy an integral
-         number of bytes.
-
-
-
-
-
-Deutsch                      Informational                      [Page 9]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         BFINAL is set if and only if this is the last block of the data
-         set.
-
-         BTYPE specifies how the data are compressed, as follows:
-
-            00 - no compression
-            01 - compressed with fixed Huffman codes
-            10 - compressed with dynamic Huffman codes
-            11 - reserved (error)
-
-         The only difference between the two compressed cases is how the
-         Huffman codes for the literal/length and distance alphabets are
-         defined.
-
-         In all cases, the decoding algorithm for the actual data is as
-         follows:
-
-            do
-               read block header from input stream.
-               if stored with no compression
-                  skip any remaining bits in current partially
-                     processed byte
-                  read LEN and NLEN (see next section)
-                  copy LEN bytes of data to output
-               otherwise
-                  if compressed with dynamic Huffman codes
-                     read representation of code trees (see
-                        subsection below)
-                  loop (until end of block code recognized)
-                     decode literal/length value from input stream
-                     if value < 256
-                        copy value (literal byte) to output stream
-                     otherwise
-                        if value = end of block (256)
-                           break from loop
-                        otherwise (value = 257..285)
-                           decode distance from input stream
-
-                           move backwards distance bytes in the output
-                           stream, and copy length bytes from this
-                           position to the output stream.
-                  end loop
-            while not last block
-
-         Note that a duplicated string reference may refer to a string
-         in a previous block; i.e., the backward distance may cross one
-         or more block boundaries.  However a distance cannot refer past
-         the beginning of the output stream.  (An application using a
-
-
-
-Deutsch                      Informational                     [Page 10]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         preset dictionary might discard part of the output stream; a
-         distance can refer to that part of the output stream anyway)
-         Note also that the referenced string may overlap the current
-         position; for example, if the last 2 bytes decoded have values
-         X and Y, a string reference with <length = 5, distance = 2>
-         adds X,Y,X,Y,X to the output stream.
-
-         We now specify each compression method in turn.
-
-      3.2.4. Non-compressed blocks (BTYPE=00)
-
-         Any bits of input up to the next byte boundary are ignored.
-         The rest of the block consists of the following information:
-
-              0   1   2   3   4...
-            +---+---+---+---+================================+
-            |  LEN  | NLEN  |... LEN bytes of literal data...|
-            +---+---+---+---+================================+
-
-         LEN is the number of data bytes in the block.  NLEN is the
-         one's complement of LEN.
-
-      3.2.5. Compressed blocks (length and distance codes)
-
-         As noted above, encoded data blocks in the "deflate" format
-         consist of sequences of symbols drawn from three conceptually
-         distinct alphabets: either literal bytes, from the alphabet of
-         byte values (0..255), or <length, backward distance> pairs,
-         where the length is drawn from (3..258) and the distance is
-         drawn from (1..32,768).  In fact, the literal and length
-         alphabets are merged into a single alphabet (0..285), where
-         values 0..255 represent literal bytes, the value 256 indicates
-         end-of-block, and values 257..285 represent length codes
-         (possibly in conjunction with extra bits following the symbol
-         code) as follows:
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                     [Page 11]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-                 Extra               Extra               Extra
-            Code Bits Length(s) Code Bits Lengths   Code Bits Length(s)
-            ---- ---- ------     ---- ---- -------   ---- ---- -------
-             257   0     3       267   1   15,16     277   4   67-82
-             258   0     4       268   1   17,18     278   4   83-98
-             259   0     5       269   2   19-22     279   4   99-114
-             260   0     6       270   2   23-26     280   4  115-130
-             261   0     7       271   2   27-30     281   5  131-162
-             262   0     8       272   2   31-34     282   5  163-194
-             263   0     9       273   3   35-42     283   5  195-226
-             264   0    10       274   3   43-50     284   5  227-257
-             265   1  11,12      275   3   51-58     285   0    258
-             266   1  13,14      276   3   59-66
-
-         The extra bits should be interpreted as a machine integer
-         stored with the most-significant bit first, e.g., bits 1110
-         represent the value 14.
-
-                  Extra           Extra               Extra
-             Code Bits Dist  Code Bits   Dist     Code Bits Distance
-             ---- ---- ----  ---- ----  ------    ---- ---- --------
-               0   0    1     10   4     33-48    20    9   1025-1536
-               1   0    2     11   4     49-64    21    9   1537-2048
-               2   0    3     12   5     65-96    22   10   2049-3072
-               3   0    4     13   5     97-128   23   10   3073-4096
-               4   1   5,6    14   6    129-192   24   11   4097-6144
-               5   1   7,8    15   6    193-256   25   11   6145-8192
-               6   2   9-12   16   7    257-384   26   12  8193-12288
-               7   2  13-16   17   7    385-512   27   12 12289-16384
-               8   3  17-24   18   8    513-768   28   13 16385-24576
-               9   3  25-32   19   8   769-1024   29   13 24577-32768
-
-      3.2.6. Compression with fixed Huffman codes (BTYPE=01)
-
-         The Huffman codes for the two alphabets are fixed, and are not
-         represented explicitly in the data.  The Huffman code lengths
-         for the literal/length alphabet are:
-
-                   Lit Value    Bits        Codes
-                   ---------    ----        -----
-                     0 - 143     8          00110000 through
-                                            10111111
-                   144 - 255     9          110010000 through
-                                            111111111
-                   256 - 279     7          0000000 through
-                                            0010111
-                   280 - 287     8          11000000 through
-                                            11000111
-
-
-
-Deutsch                      Informational                     [Page 12]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-         The code lengths are sufficient to generate the actual codes,
-         as described above; we show the codes in the table for added
-         clarity.  Literal/length values 286-287 will never actually
-         occur in the compressed data, but participate in the code
-         construction.
-
-         Distance codes 0-31 are represented by (fixed-length) 5-bit
-         codes, with possible additional bits as shown in the table
-         shown in Paragraph 3.2.5, above.  Note that distance codes 30-
-         31 will never actually occur in the compressed data.
-
-      3.2.7. Compression with dynamic Huffman codes (BTYPE=10)
-
-         The Huffman codes for the two alphabets appear in the block
-         immediately after the header bits and before the actual
-         compressed data, first the literal/length code and then the
-         distance code.  Each code is defined by a sequence of code
-         lengths, as discussed in Paragraph 3.2.2, above.  For even
-         greater compactness, the code length sequences themselves are
-         compressed using a Huffman code.  The alphabet for code lengths
-         is as follows:
-
-               0 - 15: Represent code lengths of 0 - 15
-                   16: Copy the previous code length 3 - 6 times.
-                       The next 2 bits indicate repeat length
-                             (0 = 3, ... , 3 = 6)
-                          Example:  Codes 8, 16 (+2 bits 11),
-                                    16 (+2 bits 10) will expand to
-                                    12 code lengths of 8 (1 + 6 + 5)
-                   17: Repeat a code length of 0 for 3 - 10 times.
-                       (3 bits of length)
-                   18: Repeat a code length of 0 for 11 - 138 times
-                       (7 bits of length)
-
-         A code length of 0 indicates that the corresponding symbol in
-         the literal/length or distance alphabet will not occur in the
-         block, and should not participate in the Huffman code
-         construction algorithm given earlier.  If only one distance
-         code is used, it is encoded using one bit, not zero bits; in
-         this case there is a single code length of one, with one unused
-         code.  One distance code of zero bits means that there are no
-         distance codes used at all (the data is all literals).
-
-         We can now define the format of the block:
-
-               5 Bits: HLIT, # of Literal/Length codes - 257 (257 - 286)
-               5 Bits: HDIST, # of Distance codes - 1        (1 - 32)
-               4 Bits: HCLEN, # of Code Length codes - 4     (4 - 19)
-
-
-
-Deutsch                      Informational                     [Page 13]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-               (HCLEN + 4) x 3 bits: code lengths for the code length
-                  alphabet given just above, in the order: 16, 17, 18,
-                  0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
-
-                  These code lengths are interpreted as 3-bit integers
-                  (0-7); as above, a code length of 0 means the
-                  corresponding symbol (literal/length or distance code
-                  length) is not used.
-
-               HLIT + 257 code lengths for the literal/length alphabet,
-                  encoded using the code length Huffman code
-
-               HDIST + 1 code lengths for the distance alphabet,
-                  encoded using the code length Huffman code
-
-               The actual compressed data of the block,
-                  encoded using the literal/length and distance Huffman
-                  codes
-
-               The literal/length symbol 256 (end of data),
-                  encoded using the literal/length Huffman code
-
-         The code length repeat codes can cross from HLIT + 257 to the
-         HDIST + 1 code lengths.  In other words, all code lengths form
-         a single sequence of HLIT + HDIST + 258 values.
-
-   3.3. Compliance
-
-      A compressor may limit further the ranges of values specified in
-      the previous section and still be compliant; for example, it may
-      limit the range of backward pointers to some value smaller than
-      32K.  Similarly, a compressor may limit the size of blocks so that
-      a compressible block fits in memory.
-
-      A compliant decompressor must accept the full range of possible
-      values defined in the previous section, and must accept blocks of
-      arbitrary size.
-
-4. Compression algorithm details
-
-   While it is the intent of this document to define the "deflate"
-   compressed data format without reference to any particular
-   compression algorithm, the format is related to the compressed
-   formats produced by LZ77 (Lempel-Ziv 1977, see reference [2] below);
-   since many variations of LZ77 are patented, it is strongly
-   recommended that the implementor of a compressor follow the general
-   algorithm presented here, which is known not to be patented per se.
-   The material in this section is not part of the definition of the
-
-
-
-Deutsch                      Informational                     [Page 14]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-   specification per se, and a compressor need not follow it in order to
-   be compliant.
-
-   The compressor terminates a block when it determines that starting a
-   new block with fresh trees would be useful, or when the block size
-   fills up the compressor's block buffer.
-
-   The compressor uses a chained hash table to find duplicated strings,
-   using a hash function that operates on 3-byte sequences.  At any
-   given point during compression, let XYZ be the next 3 input bytes to
-   be examined (not necessarily all different, of course).  First, the
-   compressor examines the hash chain for XYZ.  If the chain is empty,
-   the compressor simply writes out X as a literal byte and advances one
-   byte in the input.  If the hash chain is not empty, indicating that
-   the sequence XYZ (or, if we are unlucky, some other 3 bytes with the
-   same hash function value) has occurred recently, the compressor
-   compares all strings on the XYZ hash chain with the actual input data
-   sequence starting at the current point, and selects the longest
-   match.
-
-   The compressor searches the hash chains starting with the most recent
-   strings, to favor small distances and thus take advantage of the
-   Huffman encoding.  The hash chains are singly linked. There are no
-   deletions from the hash chains; the algorithm simply discards matches
-   that are too old.  To avoid a worst-case situation, very long hash
-   chains are arbitrarily truncated at a certain length, determined by a
-   run-time parameter.
-
-   To improve overall compression, the compressor optionally defers the
-   selection of matches ("lazy matching"): after a match of length N has
-   been found, the compressor searches for a longer match starting at
-   the next input byte.  If it finds a longer match, it truncates the
-   previous match to a length of one (thus producing a single literal
-   byte) and then emits the longer match.  Otherwise, it emits the
-   original match, and, as described above, advances N bytes before
-   continuing.
-
-   Run-time parameters also control this "lazy match" procedure.  If
-   compression ratio is most important, the compressor attempts a
-   complete second search regardless of the length of the first match.
-   In the normal case, if the current match is "long enough", the
-   compressor reduces the search for a longer match, thus speeding up
-   the process.  If speed is most important, the compressor inserts new
-   strings in the hash table only when no match was found, or when the
-   match is not "too long".  This degrades the compression ratio but
-   saves time since there are both fewer insertions and fewer searches.
-
-
-
-
-
-Deutsch                      Informational                     [Page 15]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-5. References
-
-   [1] Huffman, D. A., "A Method for the Construction of Minimum
-       Redundancy Codes", Proceedings of the Institute of Radio
-       Engineers, September 1952, Volume 40, Number 9, pp. 1098-1101.
-
-   [2] Ziv J., Lempel A., "A Universal Algorithm for Sequential Data
-       Compression", IEEE Transactions on Information Theory, Vol. 23,
-       No. 3, pp. 337-343.
-
-   [3] Gailly, J.-L., and Adler, M., ZLIB documentation and sources,
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [4] Gailly, J.-L., and Adler, M., GZIP documentation and sources,
-       available as gzip-*.tar in ftp://prep.ai.mit.edu/pub/gnu/
-
-   [5] Schwartz, E. S., and Kallick, B. "Generating a canonical prefix
-       encoding." Comm. ACM, 7,3 (Mar. 1964), pp. 166-169.
-
-   [6] Hirschberg and Lelewer, "Efficient decoding of prefix codes,"
-       Comm. ACM, 33,4, April 1990, pp. 449-459.
-
-6. Security Considerations
-
-   Any data compression method involves the reduction of redundancy in
-   the data.  Consequently, any corruption of the data is likely to have
-   severe effects and be difficult to correct.  Uncompressed text, on
-   the other hand, will probably still be readable despite the presence
-   of some corrupted bytes.
-
-   It is recommended that systems using this data format provide some
-   means of validating the integrity of the compressed data.  See
-   reference [3], for example.
-
-7. Source code
-
-   Source code for a C language implementation of a "deflate" compliant
-   compressor and decompressor is available within the zlib package at
-   ftp://ftp.uu.net/pub/archiving/zip/zlib/.
-
-8. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Phil Katz designed the deflate format.  Jean-Loup Gailly and Mark
-   Adler wrote the related software described in this specification.
-   Glenn Randers-Pehrson converted this document to RFC and HTML format.
-
-
-
-Deutsch                      Informational                     [Page 16]
-
-RFC 1951      DEFLATE Compressed Data Format Specification      May 1996
-
-
-9. Author's Address
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-   Questions about the technical content of this specification can be
-   sent by email to:
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to:
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                     [Page 17]
-
@@ -1,675 +0,0 @@
-
-
-
-
-
-
-Network Working Group                                         P. Deutsch
-Request for Comments: 1952                           Aladdin Enterprises
-Category: Informational                                         May 1996
-
-
-               GZIP file format specification version 4.3
-
-Status of This Memo
-
-   This memo provides information for the Internet community.  This memo
-   does not specify an Internet standard of any kind.  Distribution of
-   this memo is unlimited.
-
-IESG Note:
-
-   The IESG takes no position on the validity of any Intellectual
-   Property Rights statements contained in this document.
-
-Notices
-
-   Copyright (c) 1996 L. Peter Deutsch
-
-   Permission is granted to copy and distribute this document for any
-   purpose and without charge, including translations into other
-   languages and incorporation into compilations, provided that the
-   copyright notice and this notice are preserved, and that any
-   substantive changes or deletions from the original are clearly
-   marked.
-
-   A pointer to the latest version of this and related documentation in
-   HTML format can be found at the URL
-   <ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html>.
-
-Abstract
-
-   This specification defines a lossless compressed data format that is
-   compatible with the widely used GZIP utility.  The format includes a
-   cyclic redundancy check value for detecting data corruption.  The
-   format presently uses the DEFLATE method of compression but can be
-   easily extended to use other compression methods.  The format can be
-   implemented readily in a manner not covered by patents.
-
-
-
-
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 1]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-Table of Contents
-
-   1. Introduction ................................................... 2
-      1.1. Purpose ................................................... 2
-      1.2. Intended audience ......................................... 3
-      1.3. Scope ..................................................... 3
-      1.4. Compliance ................................................ 3
-      1.5. Definitions of terms and conventions used ................. 3
-      1.6. Changes from previous versions ............................ 3
-   2. Detailed specification ......................................... 4
-      2.1. Overall conventions ....................................... 4
-      2.2. File format ............................................... 5
-      2.3. Member format ............................................. 5
-          2.3.1. Member header and trailer ........................... 6
-              2.3.1.1. Extra field ................................... 8
-              2.3.1.2. Compliance .................................... 9
-      3. References .................................................. 9
-      4. Security Considerations .................................... 10
-      5. Acknowledgements ........................................... 10
-      6. Author's Address ........................................... 10
-      7. Appendix: Jean-Loup Gailly's gzip utility .................. 11
-      8. Appendix: Sample CRC Code .................................. 11
-
-1. Introduction
-
-   1.1. Purpose
-
-      The purpose of this specification is to define a lossless
-      compressed data format that:
-
-          * Is independent of CPU type, operating system, file system,
-            and character set, and hence can be used for interchange;
-          * Can compress or decompress a data stream (as opposed to a
-            randomly accessible file) to produce another data stream,
-            using only an a priori bounded amount of intermediate
-            storage, and hence can be used in data communications or
-            similar structures such as Unix filters;
-          * Compresses data with efficiency comparable to the best
-            currently available general-purpose compression methods,
-            and in particular considerably better than the "compress"
-            program;
-          * Can be implemented readily in a manner not covered by
-            patents, and hence can be practiced freely;
-          * Is compatible with the file format produced by the current
-            widely used gzip utility, in that conforming decompressors
-            will be able to read data produced by the existing gzip
-            compressor.
-
-
-
-
-Deutsch                      Informational                      [Page 2]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-      The data format defined by this specification does not attempt to:
-
-          * Provide random access to compressed data;
-          * Compress specialized data (e.g., raster graphics) as well as
-            the best currently available specialized algorithms.
-
-   1.2. Intended audience
-
-      This specification is intended for use by implementors of software
-      to compress data into gzip format and/or decompress data from gzip
-      format.
-
-      The text of the specification assumes a basic background in
-      programming at the level of bits and other primitive data
-      representations.
-
-   1.3. Scope
-
-      The specification specifies a compression method and a file format
-      (the latter assuming only that a file can store a sequence of
-      arbitrary bytes).  It does not specify any particular interface to
-      a file system or anything about character sets or encodings
-      (except for file names and comments, which are optional).
-
-   1.4. Compliance
-
-      Unless otherwise indicated below, a compliant decompressor must be
-      able to accept and decompress any file that conforms to all the
-      specifications presented here; a compliant compressor must produce
-      files that conform to all the specifications presented here.  The
-      material in the appendices is not part of the specification per se
-      and is not relevant to compliance.
-
-   1.5. Definitions of terms and conventions used
-
-      byte: 8 bits stored or transmitted as a unit (same as an octet).
-      (For this specification, a byte is exactly 8 bits, even on
-      machines which store a character on a number of bits different
-      from 8.)  See below for the numbering of bits within a byte.
-
-   1.6. Changes from previous versions
-
-      There have been no technical changes to the gzip format since
-      version 4.1 of this specification.  In version 4.2, some
-      terminology was changed, and the sample CRC code was rewritten for
-      clarity and to eliminate the requirement for the caller to do pre-
-      and post-conditioning.  Version 4.3 is a conversion of the
-      specification to RFC style.
-
-
-
-Deutsch                      Informational                      [Page 3]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-2. Detailed specification
-
-   2.1. Overall conventions
-
-      In the diagrams below, a box like this:
-
-         +---+
-         |   | <-- the vertical bars might be missing
-         +---+
-
-      represents one byte; a box like this:
-
-         +==============+
-         |              |
-         +==============+
-
-      represents a variable number of bytes.
-
-      Bytes stored within a computer do not have a "bit order", since
-      they are always treated as a unit.  However, a byte considered as
-      an integer between 0 and 255 does have a most- and least-
-      significant bit, and since we write numbers with the most-
-      significant digit on the left, we also write bytes with the most-
-      significant bit on the left.  In the diagrams below, we number the
-      bits of a byte so that bit 0 is the least-significant bit, i.e.,
-      the bits are numbered:
-
-         +--------+
-         |76543210|
-         +--------+
-
-      This document does not address the issue of the order in which
-      bits of a byte are transmitted on a bit-sequential medium, since
-      the data format described here is byte- rather than bit-oriented.
-
-      Within a computer, a number may occupy multiple bytes.  All
-      multi-byte numbers in the format described here are stored with
-      the least-significant byte first (at the lower memory address).
-      For example, the decimal number 520 is stored as:
-
-             0        1
-         +--------+--------+
-         |00001000|00000010|
-         +--------+--------+
-          ^        ^
-          |        |
-          |        + more significant byte = 2 x 256
-          + less significant byte = 8
-
-
-
-Deutsch                      Informational                      [Page 4]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-   2.2. File format
-
-      A gzip file consists of a series of "members" (compressed data
-      sets).  The format of each member is specified in the following
-      section.  The members simply appear one after another in the file,
-      with no additional information before, between, or after them.
-
-   2.3. Member format
-
-      Each member has the following structure:
-
-         +---+---+---+---+---+---+---+---+---+---+
-         |ID1|ID2|CM |FLG|     MTIME     |XFL|OS | (more-->)
-         +---+---+---+---+---+---+---+---+---+---+
-
-      (if FLG.FEXTRA set)
-
-         +---+---+=================================+
-         | XLEN  |...XLEN bytes of "extra field"...| (more-->)
-         +---+---+=================================+
-
-      (if FLG.FNAME set)
-
-         +=========================================+
-         |...original file name, zero-terminated...| (more-->)
-         +=========================================+
-
-      (if FLG.FCOMMENT set)
-
-         +===================================+
-         |...file comment, zero-terminated...| (more-->)
-         +===================================+
-
-      (if FLG.FHCRC set)
-
-         +---+---+
-         | CRC16 |
-         +---+---+
-
-         +=======================+
-         |...compressed blocks...| (more-->)
-         +=======================+
-
-           0   1   2   3   4   5   6   7
-         +---+---+---+---+---+---+---+---+
-         |     CRC32     |     ISIZE     |
-         +---+---+---+---+---+---+---+---+
-
-
-
-
-Deutsch                      Informational                      [Page 5]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-      2.3.1. Member header and trailer
-
-         ID1 (IDentification 1)
-         ID2 (IDentification 2)
-            These have the fixed values ID1 = 31 (0x1f, \037), ID2 = 139
-            (0x8b, \213), to identify the file as being in gzip format.
-
-         CM (Compression Method)
-            This identifies the compression method used in the file.  CM
-            = 0-7 are reserved.  CM = 8 denotes the "deflate"
-            compression method, which is the one customarily used by
-            gzip and which is documented elsewhere.
-
-         FLG (FLaGs)
-            This flag byte is divided into individual bits as follows:
-
-               bit 0   FTEXT
-               bit 1   FHCRC
-               bit 2   FEXTRA
-               bit 3   FNAME
-               bit 4   FCOMMENT
-               bit 5   reserved
-               bit 6   reserved
-               bit 7   reserved
-
-            If FTEXT is set, the file is probably ASCII text.  This is
-            an optional indication, which the compressor may set by
-            checking a small amount of the input data to see whether any
-            non-ASCII characters are present.  In case of doubt, FTEXT
-            is cleared, indicating binary data. For systems which have
-            different file formats for ascii text and binary data, the
-            decompressor can use FTEXT to choose the appropriate format.
-            We deliberately do not specify the algorithm used to set
-            this bit, since a compressor always has the option of
-            leaving it cleared and a decompressor always has the option
-            of ignoring it and letting some other program handle issues
-            of data conversion.
-
-            If FHCRC is set, a CRC16 for the gzip header is present,
-            immediately before the compressed data. The CRC16 consists
-            of the two least significant bytes of the CRC32 for all
-            bytes of the gzip header up to and not including the CRC16.
-            [The FHCRC bit was never set by versions of gzip up to
-            1.2.4, even though it was documented with a different
-            meaning in gzip 1.2.4.]
-
-            If FEXTRA is set, optional extra fields are present, as
-            described in a following section.
-
-
-
-Deutsch                      Informational                      [Page 6]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-            If FNAME is set, an original file name is present,
-            terminated by a zero byte.  The name must consist of ISO
-            8859-1 (LATIN-1) characters; on operating systems using
-            EBCDIC or any other character set for file names, the name
-            must be translated to the ISO LATIN-1 character set.  This
-            is the original name of the file being compressed, with any
-            directory components removed, and, if the file being
-            compressed is on a file system with case insensitive names,
-            forced to lower case. There is no original file name if the
-            data was compressed from a source other than a named file;
-            for example, if the source was stdin on a Unix system, there
-            is no file name.
-
-            If FCOMMENT is set, a zero-terminated file comment is
-            present.  This comment is not interpreted; it is only
-            intended for human consumption.  The comment must consist of
-            ISO 8859-1 (LATIN-1) characters.  Line breaks should be
-            denoted by a single line feed character (10 decimal).
-
-            Reserved FLG bits must be zero.
-
-         MTIME (Modification TIME)
-            This gives the most recent modification time of the original
-            file being compressed.  The time is in Unix format, i.e.,
-            seconds since 00:00:00 GMT, Jan.  1, 1970.  (Note that this
-            may cause problems for MS-DOS and other systems that use
-            local rather than Universal time.)  If the compressed data
-            did not come from a file, MTIME is set to the time at which
-            compression started.  MTIME = 0 means no time stamp is
-            available.
-
-         XFL (eXtra FLags)
-            These flags are available for use by specific compression
-            methods.  The "deflate" method (CM = 8) sets these flags as
-            follows:
-
-               XFL = 2 - compressor used maximum compression,
-                         slowest algorithm
-               XFL = 4 - compressor used fastest algorithm
-
-         OS (Operating System)
-            This identifies the type of file system on which compression
-            took place.  This may be useful in determining end-of-line
-            convention for text files.  The currently defined values are
-            as follows:
-
-
-
-
-
-
-Deutsch                      Informational                      [Page 7]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-                 0 - FAT filesystem (MS-DOS, OS/2, NT/Win32)
-                 1 - Amiga
-                 2 - VMS (or OpenVMS)
-                 3 - Unix
-                 4 - VM/CMS
-                 5 - Atari TOS
-                 6 - HPFS filesystem (OS/2, NT)
-                 7 - Macintosh
-                 8 - Z-System
-                 9 - CP/M
-                10 - TOPS-20
-                11 - NTFS filesystem (NT)
-                12 - QDOS
-                13 - Acorn RISCOS
-               255 - unknown
-
-         XLEN (eXtra LENgth)
-            If FLG.FEXTRA is set, this gives the length of the optional
-            extra field.  See below for details.
-
-         CRC32 (CRC-32)
-            This contains a Cyclic Redundancy Check value of the
-            uncompressed data computed according to CRC-32 algorithm
-            used in the ISO 3309 standard and in section 8.1.1.6.2 of
-            ITU-T recommendation V.42.  (See http://www.iso.ch for
-            ordering ISO documents. See gopher://info.itu.ch for an
-            online version of ITU-T V.42.)
-
-         ISIZE (Input SIZE)
-            This contains the size of the original (uncompressed) input
-            data modulo 2^32.
-
-      2.3.1.1. Extra field
-
-         If the FLG.FEXTRA bit is set, an "extra field" is present in
-         the header, with total length XLEN bytes.  It consists of a
-         series of subfields, each of the form:
-
-            +---+---+---+---+==================================+
-            |SI1|SI2|  LEN  |... LEN bytes of subfield data ...|
-            +---+---+---+---+==================================+
-
-         SI1 and SI2 provide a subfield ID, typically two ASCII letters
-         with some mnemonic value.  Jean-Loup Gailly
-         <gzip@prep.ai.mit.edu> is maintaining a registry of subfield
-         IDs; please send him any subfield ID you wish to use.  Subfield
-         IDs with SI2 = 0 are reserved for future use.  The following
-         IDs are currently defined:
-
-
-
-Deutsch                      Informational                      [Page 8]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-            SI1         SI2         Data
-            ----------  ----------  ----
-            0x41 ('A')  0x70 ('P')  Apollo file type information
-
-         LEN gives the length of the subfield data, excluding the 4
-         initial bytes.
-
-      2.3.1.2. Compliance
-
-         A compliant compressor must produce files with correct ID1,
-         ID2, CM, CRC32, and ISIZE, but may set all the other fields in
-         the fixed-length part of the header to default values (255 for
-         OS, 0 for all others).  The compressor must set all reserved
-         bits to zero.
-
-         A compliant decompressor must check ID1, ID2, and CM, and
-         provide an error indication if any of these have incorrect
-         values.  It must examine FEXTRA/XLEN, FNAME, FCOMMENT and FHCRC
-         at least so it can skip over the optional fields if they are
-         present.  It need not examine any other part of the header or
-         trailer; in particular, a decompressor may ignore FTEXT and OS
-         and always produce binary output, and still be compliant.  A
-         compliant decompressor must give an error indication if any
-         reserved bit is non-zero, since such a bit could indicate the
-         presence of a new field that would cause subsequent data to be
-         interpreted incorrectly.
-
-3. References
-
-   [1] "Information Processing - 8-bit single-byte coded graphic
-       character sets - Part 1: Latin alphabet No.1" (ISO 8859-1:1987).
-       The ISO 8859-1 (Latin-1) character set is a superset of 7-bit
-       ASCII. Files defining this character set are available as
-       iso_8859-1.* in ftp://ftp.uu.net/graphics/png/documents/
-
-   [2] ISO 3309
-
-   [3] ITU-T recommendation V.42
-
-   [4] Deutsch, L.P.,"DEFLATE Compressed Data Format Specification",
-       available in ftp://ftp.uu.net/pub/archiving/zip/doc/
-
-   [5] Gailly, J.-L., GZIP documentation, available as gzip-*.tar in
-       ftp://prep.ai.mit.edu/pub/gnu/
-
-   [6] Sarwate, D.V., "Computation of Cyclic Redundancy Checks via Table
-       Look-Up", Communications of the ACM, 31(8), pp.1008-1013.
-
-
-
-
-Deutsch                      Informational                      [Page 9]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-   [7] Schwaderer, W.D., "CRC Calculation", April 85 PC Tech Journal,
-       pp.118-133.
-
-   [8] ftp://ftp.adelaide.edu.au/pub/rocksoft/papers/crc_v3.txt,
-       describing the CRC concept.
-
-4. Security Considerations
-
-   Any data compression method involves the reduction of redundancy in
-   the data.  Consequently, any corruption of the data is likely to have
-   severe effects and be difficult to correct.  Uncompressed text, on
-   the other hand, will probably still be readable despite the presence
-   of some corrupted bytes.
-
-   It is recommended that systems using this data format provide some
-   means of validating the integrity of the compressed data, such as by
-   setting and checking the CRC-32 check value.
-
-5. Acknowledgements
-
-   Trademarks cited in this document are the property of their
-   respective owners.
-
-   Jean-Loup Gailly designed the gzip format and wrote, with Mark Adler,
-   the related software described in this specification.  Glenn
-   Randers-Pehrson converted this document to RFC and HTML format.
-
-6. Author's Address
-
-   L. Peter Deutsch
-   Aladdin Enterprises
-   203 Santa Margarita Ave.
-   Menlo Park, CA 94025
-
-   Phone: (415) 322-0103 (AM only)
-   FAX:   (415) 322-1734
-   EMail: <ghost@aladdin.com>
-
-   Questions about the technical content of this specification can be
-   sent by email to:
-
-   Jean-Loup Gailly <gzip@prep.ai.mit.edu> and
-   Mark Adler <madler@alumni.caltech.edu>
-
-   Editorial comments on this specification can be sent by email to:
-
-   L. Peter Deutsch <ghost@aladdin.com> and
-   Glenn Randers-Pehrson <randeg@alumni.rpi.edu>
-
-
-
-Deutsch                      Informational                     [Page 10]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-7. Appendix: Jean-Loup Gailly's gzip utility
-
-   The most widely used implementation of gzip compression, and the
-   original documentation on which this specification is based, were
-   created by Jean-Loup Gailly <gzip@prep.ai.mit.edu>.  Since this
-   implementation is a de facto standard, we mention some more of its
-   features here.  Again, the material in this section is not part of
-   the specification per se, and implementations need not follow it to
-   be compliant.
-
-   When compressing or decompressing a file, gzip preserves the
-   protection, ownership, and modification time attributes on the local
-   file system, since there is no provision for representing protection
-   attributes in the gzip file format itself.  Since the file format
-   includes a modification time, the gzip decompressor provides a
-   command line switch that assigns the modification time from the file,
-   rather than the local modification time of the compressed input, to
-   the decompressed output.
-
-8. Appendix: Sample CRC Code
-
-   The following sample code represents a practical implementation of
-   the CRC (Cyclic Redundancy Check). (See also ISO 3309 and ITU-T V.42
-   for a formal specification.)
-
-   The sample code is in the ANSI C programming language. Non C users
-   may find it easier to read with these hints:
-
-      &      Bitwise AND operator.
-      ^      Bitwise exclusive-OR operator.
-      >>     Bitwise right shift operator. When applied to an
-             unsigned quantity, as here, right shift inserts zero
-             bit(s) at the left.
-      !      Logical NOT operator.
-      ++     "n++" increments the variable n.
-      0xNNN  0x introduces a hexadecimal (base 16) constant.
-             Suffix L indicates a long value (at least 32 bits).
-
-      /* Table of CRCs of all 8-bit messages. */
-      unsigned long crc_table[256];
-
-      /* Flag: has the table been computed? Initially false. */
-      int crc_table_computed = 0;
-
-      /* Make the table for a fast CRC. */
-      void make_crc_table(void)
-      {
-        unsigned long c;
-
-
-
-Deutsch                      Informational                     [Page 11]
-
-RFC 1952             GZIP File Format Specification             May 1996
-
-
-        int n, k;
-        for (n = 0; n < 256; n++) {
-          c = (unsigned long) n;
-          for (k = 0; k < 8; k++) {
-            if (c & 1) {
-              c = 0xedb88320L ^ (c >> 1);
-            } else {
-              c = c >> 1;
-            }
-          }
-          crc_table[n] = c;
-        }
-        crc_table_computed = 1;
-      }
-
-      /*
-         Update a running crc with the bytes buf[0..len-1] and return
-       the updated crc. The crc should be initialized to zero. Pre- and
-       post-conditioning (one's complement) is performed within this
-       function so it shouldn't be done by the caller. Usage example:
-
-         unsigned long crc = 0L;
-
-         while (read_buffer(buffer, length) != EOF) {
-           crc = update_crc(crc, buffer, length);
-         }
-         if (crc != original_crc) error();
-      */
-      unsigned long update_crc(unsigned long crc,
-                      unsigned char *buf, int len)
-      {
-        unsigned long c = crc ^ 0xffffffffL;
-        int n;
-
-        if (!crc_table_computed)
-          make_crc_table();
-        for (n = 0; n < len; n++) {
-          c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8);
-        }
-        return c ^ 0xffffffffL;
-      }
-
-      /* Return the CRC of the bytes buf[0..len-1]. */
-      unsigned long crc(unsigned char *buf, int len)
-      {
-        return update_crc(0L, buf, len);
-      }
-
-
-
-
-Deutsch                      Informational                     [Page 12]
-
@@ -1,107 +0,0 @@
-A Fast Method for Identifying Plain Text Files
-==============================================
-
-
-Introduction
------------
-
-Given a file coming from an unknown source, it is sometimes desirable
-to find out whether the format of that file is plain text.  Although
-this may appear like a simple task, a fully accurate detection of the
-file type requires heavy-duty semantic analysis on the file contents.
-It is, however, possible to obtain satisfactory results by employing
-various heuristics.
-
-Previous versions of PKZip and other zip-compatible compression tools
-were using a crude detection scheme: if more than 80% (4/5) of the bytes
-found in a certain buffer are within the range [7..127], the file is
-labeled as plain text, otherwise it is labeled as binary.  A prominent
-limitation of this scheme is the restriction to Latin-based alphabets.
-Other alphabets, like Greek, Cyrillic or Asian, make extensive use of
-the bytes within the range [128..255], and texts using these alphabets
-are most often misidentified by this scheme; in other words, the rate
-of false negatives is sometimes too high, which means that the recall
-is low.  Another weakness of this scheme is a reduced precision, due to
-the false positives that may occur when binary files containing large
-amounts of textual characters are misidentified as plain text.
-
-In this article we propose a new, simple detection scheme that features
-a much increased precision and a near-100% recall.  This scheme is
-designed to work on ASCII, Unicode and other ASCII-derived alphabets,
-and it handles single-byte encodings (ISO-8859, MacRoman, KOI8, etc.)
-and variable-sized encodings (ISO-2022, UTF-8, etc.).  Wider encodings
-(UCS-2/UTF-16 and UCS-4/UTF-32) are not handled, however.
-
-
-The Algorithm
-------------
-
-The algorithm works by dividing the set of bytecodes [0..255] into three
-categories:
- The allow list of textual bytecodes:
-  9 (TAB), 10 (LF), 13 (CR), 32 (SPACE) to 255.
- The gray list of tolerated bytecodes:
-  7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB), 27 (ESC).
- The block list of undesired, non-textual bytecodes:
-  0 (NUL) to 6, 14 to 31.
-
-If a file contains at least one byte that belongs to the allow list and
-no byte that belongs to the block list, then the file is categorized as
-plain text; otherwise, it is categorized as binary.  (The boundary case,
-when the file is empty, automatically falls into the latter category.)
-
-
-Rationale
---------
-
-The idea behind this algorithm relies on two observations.
-
-The first observation is that, although the full range of 7-bit codes
-[0..127] is properly specified by the ASCII standard, most control
-characters in the range [0..31] are not used in practice.  The only
-widely-used, almost universally-portable control codes are 9 (TAB),
-10 (LF) and 13 (CR).  There are a few more control codes that are
-recognized on a reduced range of platforms and text viewers/editors:
-7 (BEL), 8 (BS), 11 (VT), 12 (FF), 26 (SUB) and 27 (ESC); but these
-codes are rarely (if ever) used alone, without being accompanied by
-some printable text.  Even the newer, portable text formats such as
-XML avoid using control characters outside the list mentioned here.
-
-The second observation is that most of the binary files tend to contain
-control characters, especially 0 (NUL).  Even though the older text
-detection schemes observe the presence of non-ASCII codes from the range
-[128..255], the precision rarely has to suffer if this upper range is
-labeled as textual, because the files that are genuinely binary tend to
-contain both control characters and codes from the upper range.  On the
-other hand, the upper range needs to be labeled as textual, because it
-is used by virtually all ASCII extensions.  In particular, this range is
-used for encoding non-Latin scripts.
-
-Since there is no counting involved, other than simply observing the
-presence or the absence of some byte values, the algorithm produces
-consistent results, regardless what alphabet encoding is being used.
-(If counting were involved, it could be possible to obtain different
-results on a text encoded, say, using ISO-8859-16 versus UTF-8.)
-
-There is an extra category of plain text files that are "polluted" with
-one or more block-listed codes, either by mistake or by peculiar design
-considerations.  In such cases, a scheme that tolerates a small fraction
-of block-listed codes would provide an increased recall (i.e. more true
-positives).  This, however, incurs a reduced precision overall, since
-false positives are more likely to appear in binary files that contain
-large chunks of textual data.  Furthermore, "polluted" plain text should
-be regarded as binary by general-purpose text detection schemes, because
-general-purpose text processing algorithms might not be applicable.
-Under this premise, it is safe to say that our detection method provides
-a near-100% recall.
-
-Experiments have been run on many files coming from various platforms
-and applications.  We tried plain text files, system logs, source code,
-formatted office documents, compiled object code, etc.  The results
-confirm the optimistic assumptions about the capabilities of this
-algorithm.
-
-
--
-Cosmin Truta
-Last updated: 2006-May-28
@@ -212,8 +212,8 @@
     to the appropriate recovery below.  If there is no foo.add file, provide
     a zero data length to the recovery.  In that case, the append recovery
     restores the foo.gz to the previous compressed + uncompressed data state.
-     For the compress recovery, a missing foo.add file results in foo.gz being
-     restored to the previous compressed-only data state.
+     For the the compress recovery, a missing foo.add file results in foo.gz
+     being restored to the previous compressed-only data state.
   - Append recovery:
     - Pick up append at + step above
   - Compress recovery:
@@ -267,7 +267,7 @@ static inline void append_bits(unsigned value, int bits,
    }
 }

-// Insert enough bits in the form of empty deflate blocks in front of the
+// Insert enough bits in the form of empty deflate blocks in front of the the
 // low bits bits of value, in order to bring the sequence to a byte boundary.
 // Then feed that to inflate(). This does what inflatePrime() does, except that
 // a negative value of bits is not supported. bits must be in 0..16. If the
@@ -1,5 +1,5 @@
 /* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004-2024 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -210,5 +210,9 @@ char ZLIB_INTERNAL *gz_strwinerror(DWORD error);
 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
   value -- needed when comparing unsigned to z_off64_t, which is signed
   (possible z_off64_t types off_t, off64_t, and long are all signed) */
+#ifdef INT_MAX
+#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
+#else
 unsigned ZLIB_INTERNAL gz_intmax(void);
-#define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
+#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
+#endif
@@ -1,5 +1,5 @@
 /* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004-2024 Mark Adler
+ * Copyright (C) 2004-2019 Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -563,20 +563,20 @@ void ZLIB_INTERNAL gz_error(gz_statep state, int err, const char *msg) {
 #endif
 }

+#ifndef INT_MAX
 /* portably return maximum value for an int (when limits.h presumed not
   available) -- we need to do this to cover cases where 2's complement not
   used, since C standard permits 1's complement and sign-bit representations,
   otherwise we could just use ((unsigned)-1) >> 1 */
 unsigned ZLIB_INTERNAL gz_intmax(void) {
-#ifdef INT_MAX
-    return INT_MAX;
-#else
-    unsigned p = 1, q;
+    unsigned p, q;
+
+    p = 1;
    do {
        q = p;
        p <<= 1;
        p++;
    } while (p > q);
    return q >> 1;
-#endif
 }
+#endif
@@ -1387,7 +1387,7 @@ int ZEXPORT inflateSync(z_streamp strm) {
    /* if first time, start search in bit buffer */
    if (state->mode != SYNC) {
        state->mode = SYNC;
-        state->hold >>= state->bits & 7;
+        state->hold <<= state->bits & 7;
        state->bits -= state->bits & 7;
        len = 0;
        while (state->bits >= 8) {
@@ -1,5 +1,5 @@
 /* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2024 Mark Adler
+ * Copyright (C) 1995-2023 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 1.3.1 Copyright 1995-2024 Mark Adler ";
+   " inflate 1.3 Copyright 1995-2023 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
@@ -57,7 +57,7 @@ int ZLIB_INTERNAL inflate_table(codetype type, unsigned short FAR *lens,
        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
    static const unsigned short lext[31] = { /* Length codes 257..285 extra */
        16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
-        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 203, 77};
+        19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 198, 203};
    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,
@@ -41,8 +41,8 @@ typedef struct {
   examples/enough.c found in the zlib distribution.  The arguments to that
   program are the number of symbols, the initial root table size, and the
   maximum bit length of a code.  "enough 286 9 15" for literal/length codes
-   returns 852, and "enough 30 6 15" for distance codes returns 592. The
-   initial root table size (9 or 6) is found in the fifth argument of the
+   returns returns 852, and "enough 30 6 15" for distance codes returns 592.
+   The initial root table size (9 or 6) is found in the fifth argument of the
   inflate_table() calls in inflate.c and infback.c.  If the root table size is
   changed, then these maximum sizes would be need to be recalculated and
   updated. */
@@ -115,7 +115,7 @@ SUCCESS Then
        ReDim Preserve bytaryCpr(lngCprSiz - 1)
        Open strCprPth For Binary Access Write As #1
            Put #1, , bytaryCpr()
-            Put #1, , lngOriSiz 'Add the original size value to the end
+            Put #1, , lngOriSiz 'Add the the original size value to the end
 (last 4 bytes)
        Close #1
    Else
@@ -1,4 +1,4 @@
-        ZLIB version 1.3.1 for OS/400 installation instructions
+        ZLIB version 1.3.0 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 1.3.1
+      *  Version 1.3.0
      *
      *
      *  WARNING:
@@ -22,12 +22,12 @@
      *
      *  Versioning information.
      *
-     D ZLIB_VERSION    C                   '1.3.1'
+     D ZLIB_VERSION    C                   '1.3.0'
     D ZLIB_VERNUM     C                   X'12a0'
     D ZLIB_VER_MAJOR  C                   1
     D ZLIB_VER_MINOR  C                   3
     D ZLIB_VER_REVISION...
-     D                 C                   1
+     D                 C                   0
     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.1.3.1" install="/opt/lib/" user="root:bin" permission="644"/>
-         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.3.1"/>
-         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.3.1"/>
-         <QPG:Add file="../libz.so.1.3.1" install="/opt/lib/" component="slib"/>
+         <QPG:Add file="../libz.so.1.3.0" install="/opt/lib/" user="root:bin" permission="644"/>
+         <QPG:Add file="libz.so" install="/opt/lib/" component="dev" filetype="symlink" linkto="libz.so.1.3.0"/>
+         <QPG:Add file="libz.so.1" install="/opt/lib/" filetype="symlink" linkto="libz.so.1.3.0"/>
+         <QPG:Add file="../libz.so.1.3.0" install="/opt/lib/" component="slib"/>
      </QPG:Files>

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

            <QPM:ReleaseDescription>
-               <QPM:ReleaseVersion>1.3.1</QPM:ReleaseVersion>
+               <QPM:ReleaseVersion>1.3.0</QPM:ReleaseVersion>
               <QPM:ReleaseUrgency>Medium</QPM:ReleaseUrgency>
               <QPM:ReleaseStability>Stable</QPM:ReleaseStability>
               <QPM:ReleaseNoteMinor></QPM:ReleaseNoteMinor>
@@ -36,12 +36,12 @@ static uLong dictId;    /* Adler32 value of the dictionary */

 #ifdef Z_SOLO

-static void *myalloc(void *q, unsigned n, unsigned m) {
+void *myalloc(void *q, unsigned n, unsigned m) {
    (void)q;
    return calloc(n, m);
 }

-static void myfree(void *q, void *p) {
+void myfree(void *q, void *p) {
    (void)q;
    free(p);
 }
@@ -57,7 +57,7 @@ static free_func zfree = (free_func)0;
 /* ===========================================================================
 * Test compress() and uncompress()
 */
-static void test_compress(Byte *compr, uLong comprLen, Byte *uncompr,
+void test_compress(Byte *compr, uLong comprLen, Byte *uncompr,
                   uLong uncomprLen) {
    int err;
    uLong len = (uLong)strlen(hello)+1;
@@ -81,7 +81,7 @@ static void test_compress(Byte *compr, uLong comprLen, Byte *uncompr,
 /* ===========================================================================
 * Test read/write of .gz files
 */
-static void test_gzio(const char *fname, Byte *uncompr, uLong uncomprLen) {
+void test_gzio(const char *fname, Byte *uncompr, uLong uncomprLen) {
 #ifdef NO_GZCOMPRESS
    fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
 #else
@@ -163,7 +163,7 @@ static void test_gzio(const char *fname, Byte *uncompr, uLong uncomprLen) {
 /* ===========================================================================
 * Test deflate() with small buffers
 */
-static void test_deflate(Byte *compr, uLong comprLen) {
+void test_deflate(Byte *compr, uLong comprLen) {
    z_stream c_stream; /* compression stream */
    int err;
    uLong len = (uLong)strlen(hello)+1;
@@ -198,7 +198,7 @@ static void test_deflate(Byte *compr, uLong comprLen) {
 /* ===========================================================================
 * Test inflate() with small buffers
 */
-static void test_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
+void test_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
                  uLong uncomprLen) {
    int err;
    z_stream d_stream; /* decompression stream */
@@ -237,7 +237,7 @@ static void test_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
 /* ===========================================================================
 * Test deflate() with large buffers and dynamic change of compression level
 */
-static void test_large_deflate(Byte *compr, uLong comprLen, Byte *uncompr,
+void test_large_deflate(Byte *compr, uLong comprLen, Byte *uncompr,
                        uLong uncomprLen) {
    z_stream c_stream; /* compression stream */
    int err;
@@ -290,7 +290,7 @@ static void test_large_deflate(Byte *compr, uLong comprLen, Byte *uncompr,
 /* ===========================================================================
 * Test inflate() with large buffers
 */
-static void test_large_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
+void test_large_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
                        uLong uncomprLen) {
    int err;
    z_stream d_stream; /* decompression stream */
@@ -329,7 +329,7 @@ static void test_large_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
 /* ===========================================================================
 * Test deflate() with full flush
 */
-static void test_flush(Byte *compr, uLong *comprLen) {
+void test_flush(Byte *compr, uLong *comprLen) {
    z_stream c_stream; /* compression stream */
    int err;
    uInt len = (uInt)strlen(hello)+1;
@@ -364,8 +364,7 @@ static void test_flush(Byte *compr, uLong *comprLen) {
 /* ===========================================================================
 * Test inflateSync()
 */
-static void test_sync(Byte *compr, uLong comprLen, Byte *uncompr,
-                      uLong uncomprLen) {
+void test_sync(Byte *compr, uLong comprLen, Byte *uncompr, uLong uncomprLen) {
    int err;
    z_stream d_stream; /* decompression stream */

@@ -405,7 +404,7 @@ static void test_sync(Byte *compr, uLong comprLen, Byte *uncompr,
 /* ===========================================================================
 * Test deflate() with preset dictionary
 */
-static void test_dict_deflate(Byte *compr, uLong comprLen) {
+void test_dict_deflate(Byte *compr, uLong comprLen) {
    z_stream c_stream; /* compression stream */
    int err;

@@ -439,7 +438,7 @@ static void test_dict_deflate(Byte *compr, uLong comprLen) {
 /* ===========================================================================
 * Test inflate() with a preset dictionary
 */
-static void test_dict_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
+void test_dict_inflate(Byte *compr, uLong comprLen, Byte *uncompr,
                       uLong uncomprLen) {
    int err;
    z_stream d_stream; /* decompression stream */
@@ -149,12 +149,12 @@ static void pwinerror (s)
 #  include <unistd.h>       /* for unlink() */
 #endif

-static void *myalloc(void *q, unsigned n, unsigned m) {
+void *myalloc(void *q, unsigned n, unsigned m) {
    (void)q;
    return calloc(n, m);
 }

-static void myfree(void *q, void *p) {
+void myfree(void *q, void *p) {
    (void)q;
    free(p);
 }
@@ -167,7 +167,7 @@ typedef struct gzFile_s {
    z_stream strm;
 } *gzFile;

-static gzFile gz_open(const char *path, int fd, const char *mode) {
+gzFile gz_open(const char *path, int fd, const char *mode) {
    gzFile gz;
    int ret;

@@ -201,15 +201,15 @@ static gzFile gz_open(const char *path, int fd, const char *mode) {
    return gz;
 }

-static gzFile gzopen(const char *path, const char *mode) {
+gzFile gzopen(const char *path, const char *mode) {
    return gz_open(path, -1, mode);
 }

-static gzFile gzdopen(int fd, const char *mode) {
+gzFile gzdopen(int fd, const char *mode) {
    return gz_open(NULL, fd, mode);
 }

-static int gzwrite(gzFile gz, const void *buf, unsigned len) {
+int gzwrite(gzFile gz, const void *buf, unsigned len) {
    z_stream *strm;
    unsigned char out[BUFLEN];

@@ -227,7 +227,7 @@ static int gzwrite(gzFile gz, const void *buf, unsigned len) {
    return len;
 }

-static int gzread(gzFile gz, void *buf, unsigned len) {
+int gzread(gzFile gz, void *buf, unsigned len) {
    int ret;
    unsigned got;
    unsigned char in[1];
@@ -258,7 +258,7 @@ static int gzread(gzFile gz, void *buf, unsigned len) {
    return len - strm->avail_out;
 }

-static int gzclose(gzFile gz) {
+int gzclose(gzFile gz) {
    z_stream *strm;
    unsigned char out[BUFLEN];

@@ -283,7 +283,7 @@ static int gzclose(gzFile gz) {
    return Z_OK;
 }

-static const char *gzerror(gzFile gz, int *err) {
+const char *gzerror(gzFile gz, int *err) {
    *err = gz->err;
    return gz->msg;
 }
@@ -295,7 +295,7 @@ static char *prog;
 /* ===========================================================================
 * Display error message and exit
 */
-static void error(const char *msg) {
+void error(const char *msg) {
    fprintf(stderr, "%s: %s\n", prog, msg);
    exit(1);
 }
@@ -303,9 +303,9 @@ static void error(const char *msg) {
 #ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */

 /* Try compressing the input file at once using mmap. Return Z_OK if
- * success, Z_ERRNO otherwise.
+ * if success, Z_ERRNO otherwise.
 */
-static int gz_compress_mmap(FILE *in, gzFile out) {
+int gz_compress_mmap(FILE *in, gzFile out) {
    int len;
    int err;
    int ifd = fileno(in);
@@ -338,7 +338,7 @@ static int gz_compress_mmap(FILE *in, gzFile out) {
 * Compress input to output then close both files.
 */

-static void gz_compress(FILE *in, gzFile out) {
+void gz_compress(FILE *in, gzFile out) {
    local char buf[BUFLEN];
    int len;
    int err;
@@ -366,7 +366,7 @@ static void gz_compress(FILE *in, gzFile out) {
 /* ===========================================================================
 * Uncompress input to output then close both files.
 */
-static void gz_uncompress(gzFile in, FILE *out) {
+void gz_uncompress(gzFile in, FILE *out) {
    local char buf[BUFLEN];
    int len;
    int err;
@@ -390,7 +390,7 @@ static void gz_uncompress(gzFile in, FILE *out) {
 * Compress the given file: create a corresponding .gz file and remove the
 * original.
 */
-static void file_compress(char *file, char *mode) {
+void file_compress(char *file, char *mode) {
    local char outfile[MAX_NAME_LEN];
    FILE  *in;
    gzFile out;
@@ -426,7 +426,7 @@ static void file_compress(char *file, char *mode) {
 /* ===========================================================================
 * Uncompress the given file and remove the original.
 */
-static void file_uncompress(char *file) {
+void file_uncompress(char *file) {
    local char buf[MAX_NAME_LEN];
    char *infile, *outfile;
    FILE  *out;
@@ -1,6 +1,6 @@
 <?xml version="1.0" ?>
-<package name="zlib" version="1.3.1">
-    <library name="zlib" dlversion="1.3.1" dlname="z">
+<package name="zlib" version="1.3">
+    <library name="zlib" dlversion="1.3" 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) 1995-2024 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
 */
@@ -899,19 +899,14 @@ local void compress_block(deflate_state *s, const ct_data *ltree,
                          const ct_data *dtree) {
    unsigned dist;      /* distance of matched string */
    int lc;             /* match length or unmatched char (if dist == 0) */
-    unsigned sx = 0;    /* running index in symbol buffers */
+    unsigned sx = 0;    /* running index in sym_buf */
    unsigned code;      /* the code to send */
    int extra;          /* number of extra bits to send */

    if (s->sym_next != 0) do {
-#ifdef LIT_MEM
-        dist = s->d_buf[sx];
-        lc = s->l_buf[sx++];
-#else
        dist = s->sym_buf[sx++] & 0xff;
        dist += (unsigned)(s->sym_buf[sx++] & 0xff) << 8;
        lc = s->sym_buf[sx++];
-#endif
        if (dist == 0) {
            send_code(s, lc, ltree); /* send a literal byte */
            Tracecv(isgraph(lc), (stderr," '%c' ", lc));
@@ -936,12 +931,8 @@ local void compress_block(deflate_state *s, const ct_data *ltree,
            }
        } /* literal or match pair ? */

-        /* Check for no overlay of pending_buf on needed symbols */
-#ifdef LIT_MEM
-        Assert(s->pending < 2 * (s->lit_bufsize + sx), "pendingBuf overflow");
-#else
+        /* Check that the overlay between pending_buf and sym_buf is ok: */
        Assert(s->pending < s->lit_bufsize + sx, "pendingBuf overflow");
-#endif

    } while (sx < s->sym_next);

@@ -1091,14 +1082,9 @@ void ZLIB_INTERNAL _tr_flush_block(deflate_state *s, charf *buf,
 * the current block must be flushed.
 */
 int ZLIB_INTERNAL _tr_tally(deflate_state *s, unsigned dist, unsigned lc) {
-#ifdef LIT_MEM
-    s->d_buf[s->sym_next] = (ush)dist;
-    s->l_buf[s->sym_next++] = (uch)lc;
-#else
    s->sym_buf[s->sym_next++] = (uch)dist;
    s->sym_buf[s->sym_next++] = (uch)(dist >> 8);
    s->sym_buf[s->sym_next++] = (uch)lc;
-#endif
    if (dist == 0) {
        /* lc is the unmatched char */
        s->dyn_ltree[lc].Freq++;
@@ -3,7 +3,7 @@


 This document describes the design, the rationale, and the usage
-of the common DLL build of zlib, named ZLIB1.DLL.  If you have
+of the official DLL build of zlib, named ZLIB1.DLL.  If you have
 general questions about zlib, you should see the file "FAQ" found
 in the zlib distribution, or at the following location:
  http://www.gzip.org/zlib/zlib_faq.html
@@ -11,9 +11,13 @@ in the zlib distribution, or at the following location:

 1. What is ZLIB1.DLL, and how can I get it?

-  - ZLIB1.DLL is the common build of zlib as a DLL.
+  - ZLIB1.DLL is the official build of zlib as a DLL.
    (Please remark the character '1' in the name.)

+    Pointers to a precompiled ZLIB1.DLL can be found in the zlib
+    web site at:
+      http://www.zlib.net/
+
    Applications that link to ZLIB1.DLL can rely on the following
    specification:

@@ -375,6 +379,18 @@ in the zlib distribution, or at the following location:
    code.  But you can make your own private DLL build, under a
    different file name, as suggested in the previous answer.

+
+17. I made my own ZLIB1.DLL build.  Can I test it for compliance?
+
+  - We prefer that you download the official DLL from the zlib
+    web site.  If you need something peculiar from this DLL, you
+    can send your suggestion to the zlib mailing list.
+
+    However, in case you do rebuild the DLL yourself, you can run
+    it with the test programs found in the DLL distribution.
+    Running these test programs is not a guarantee of compliance,
+    but a failure can imply a detected problem.
+
 **

 This document is written and maintained by
@@ -1,6 +1,6 @@
 ZLIB DATA COMPRESSION LIBRARY

-zlib 1.3.1 is a general purpose data compression library.  All the code is
+zlib 1.3.0 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)
@@ -16,13 +16,13 @@ is http://zlib.net/ .  Before reporting a problem, please check this site to
 verify that you have the latest version of zlib; otherwise get the latest
 version and check whether the problem still exists or not.

-PLEASE read DLL_FAQ.txt, and the zlib FAQ http://zlib.net/zlib_faq.html before
-asking for help.
+PLEASE read DLL_FAQ.txt, and the the zlib FAQ http://zlib.net/zlib_faq.html
+before asking for help.


 Manifest:

-The package zlib-1.3.1-win32-x86.zip will contain the following files:
+The package zlib-1.3.0-win32-x86.zip will contain the following files:

  README-WIN32.txt This document
  ChangeLog        Changes since previous zlib packages
@@ -6,7 +6,7 @@ What's here

 Source
 ======
-  zlib version 1.3.1
+  zlib version 1.3.0
  available at http://www.gzip.org/zlib/


@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -300,6 +300,14 @@
 #  endif
 #endif

+#ifndef Z_ARG /* function prototypes for stdarg */
+#  if defined(STDC) || defined(Z_HAVE_STDARG_H)
+#    define Z_ARG(args)  args
+#  else
+#    define Z_ARG(args)  ()
+#  endif
+#endif
+
 /* The following definitions for FAR are needed only for MSDOS mixed
 * model programming (small or medium model with some far allocations).
 * This was tested only with MSC; for other MSDOS compilers you may have
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -302,6 +302,14 @@
 #  endif
 #endif

+#ifndef Z_ARG /* function prototypes for stdarg */
+#  if defined(STDC) || defined(Z_HAVE_STDARG_H)
+#    define Z_ARG(args)  args
+#  else
+#    define Z_ARG(args)  ()
+#  endif
+#endif
+
 /* The following definitions for FAR are needed only for MSDOS mixed
 * model programming (small or medium model with some far allocations).
 * This was tested only with MSC; for other MSDOS compilers you may have
@@ -1,5 +1,5 @@
 /* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
 * For conditions of distribution and use, see copyright notice in zlib.h
 */

@@ -300,6 +300,14 @@
 #  endif
 #endif

+#ifndef Z_ARG /* function prototypes for stdarg */
+#  if defined(STDC) || defined(Z_HAVE_STDARG_H)
+#    define Z_ARG(args)  args
+#  else
+#    define Z_ARG(args)  ()
+#  endif
+#endif
+
 /* The following definitions for FAR are needed only for MSDOS mixed
 * model programming (small or medium model with some far allocations).
 * This was tested only with MSC; for other MSDOS compilers you may have
@@ -1,4 +1,4 @@
-.TH ZLIB 3 "22 Jan 2024"
+.TH ZLIB 3 "18 Aug 2023"
 .SH NAME
 zlib \- compression/decompression library
 .SH SYNOPSIS
@@ -105,9 +105,9 @@ before asking for help.
 Send questions and/or comments to zlib@gzip.org,
 or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
 .SH AUTHORS AND LICENSE
-Version 1.3.1
+Version 1.3
 .LP
-Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
+Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
 .LP
 This software is provided 'as-is', without any express or implied
 warranty.  In no event will the authors be held liable for any damages
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
jan.nijtmans	12d09ed4d9	Always use UCHAR() with isxdigit(). doc fix	2023-09-01 17:03:36 +00:00
griffin	ebec0ccb97	Fix bug with octal. Add floating point example to doc.	2023-09-01 15:17:41 +00:00
griffin	4f5685bc2e	Use system isxdigit.	2023-09-01 02:26:56 +00:00
griffin	54a1421d88	merge trunk	2023-09-01 02:06:48 +00:00
griffin	618269ede0	Rewrite how numeric whitespace is processed in TclParseNumber. Add more number test cases.	2023-09-01 01:15:50 +00:00
jan.nijtmans	b8e93abb30	Merge 8.7	2023-08-31 13:14:34 +00:00
jan.nijtmans	a77a09d3df	Make Tcl_NRCallObjProc2 definition match documentation (ptrdiff_t -> Tcl_Size, which is - actually - just the same)	2023-08-31 07:23:14 +00:00
griffin	242cba5fc0	fix several issues with numeric whitespace by limiting where '_' is allowed.	2023-08-30 22:06:57 +00:00
jan.nijtmans	54f15faba5	Merge 8.7	2023-08-30 10:48:33 +00:00
jan.nijtmans	f683d1f837	Slightly better binary compatibility between 8.7 and 9.0 on win64 and cygwin: for those platforms keep "usec" in Tcl_Time 32-bit.	2023-08-29 19:35:37 +00:00
jan.nijtmans	7896482e74	Merge 8.7	2023-08-29 13:39:55 +00:00
griffin	aa52afd6f9	fix for invalid numeric whitespace syntax bug.	2023-08-29 01:51:53 +00:00
jan.nijtmans	176f7adfae	Use sizeof(Tcl_Size) in stead of TCL_SIZE_MAX	2023-08-28 07:59:55 +00:00
jan.nijtmans	b0ec1c9cc4	Unbreak Tcl9 build (TCL_SIZE_MAX usage)	2023-08-27 20:26:27 +00:00
jan.nijtmans	07f67db36d	Temporary mark interp-34.11 test-case a knownBug. Fix ongoing in separate branch	2023-08-27 17:15:15 +00:00
jan.nijtmans	f935e5118d	Merge 8.7	2023-08-27 16:51:00 +00:00
jan.nijtmans	580403cf61	Fix suggestion in [86dd172271], updateing Tcl_Time.sec to "long long". This is a binary incompatibility for 32-bit platforms!	2023-08-26 20:37:28 +00:00