*.a
*.bmp
*.dll
*.exe
*.gif
*.gz
*.jpg

compat/zlib/contrib/dotzlib/DotZLib/UnitTests.cs
compat/zlib/contrib/vstudio/readme.txt
compat/zlib/contrib/vstudio/*/zlib.rc
compat/zlib/contrib/vstudio/*/*.sln
compat/zlib/win32/*.txt
compat/zlib/win64/*.txt
libtommath/*.dsp
libtommath/*.sln
libtommath/*.vcproj

tools/tcl.wse.in
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

tools/tcl.wse.in
win/buildall.vc.bat
win/coffbase.txt
win/makefile.vc
win/rules.vc
win/tcl.dsp
win/tcl.dsw

# Declare files that will always have CRLF line endings on checkout.
*.bat eol=crlf
*.sln eol=crlf
*.vc eol=crlf

# Denote all files that are truly binary and should not be modified.
*.a binary
*.bmp binary
*.dll binary
*.exe binary
*.gif binary
*.gz binary
*.jpg binary
*.lib binary
*.pdf binary

name: Linux
on: [push]
jobs:
  gcc:
    runs-on: ubuntu-20.04
    strategy:
      matrix:
        cfgopt:
          - ""
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
          - "CFLAGS=-DTCL_UTF_MAX=4"
    defaults:
      run:
        shell: bash
        working-directory: unix
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Prepare
        run: touch tclStubInit.c tclOOStubInit.c tclOOScript.h
        working-directory: generic
      - name: Configure ${{ matrix.cfgopt }}
        run: |
          mkdir "${HOME}/install dir"
          ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
        env:
          CFGOPT: ${{ matrix.cfgopt }}
      - name: Build
        run: |
          make all
      - name: Build Test Harness
        run: |
          make tcltest
      - name: Run Tests
        run: |
          make test
      - name: Test-Drive Installation
        run: |
          make install
      - name: Create Distribution Package
        run: |
          make dist
      - name: Convert Documentation to HTML
        run: |
          make html-tcl

name: macOS
on: [push]
jobs:
  xcode:
    runs-on: macos-11.0
    defaults:
      run:
        shell: bash
        working-directory: macosx
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Prepare
        run: touch tclStubInit.c tclOOStubInit.c tclOOScript.h
        working-directory: generic
      - name: Build
        run: make all
      - name: Run Tests
        run: make test styles=develop
        env:
          ERROR_ON_FAILURES: 1
          MAC_CI: 1
  clang:
    runs-on: macos-11.0
    strategy:
      matrix:
        cfgopt:
          - ""
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
    defaults:
      run:
        shell: bash
        working-directory: unix
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
          mkdir "$HOME/install dir"
        working-directory: generic
      - name: Configure ${{ matrix.cfgopt }}
        # Note that macOS is always a 64 bit platform
        run: ./configure --enable-64bit --enable-dtrace --enable-framework ${CFGOPT} "--prefix=$HOME/install" || (cat config.log && exit 1)
        env:
          CFGOPT: ${{ matrix.cfgopt }}
      - name: Build
        run: |
          make all tcltest
      - name: Run Tests
        run: |
          make test
        env:
          ERROR_ON_FAILURES: 1
          MAC_CI: 1

name: Build Binaries
on: [push]
jobs:
  linux:
    name: Linux
    runs-on: ubuntu-16.04
    defaults:
      run:
        shell: bash
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Prepare
        run: |
          touch generic/tclStubInit.c generic/tclOOStubInit.c
          mkdir 1dist
          echo "VER_PATH=$(cd tools; pwd)/addVerToFile.tcl" >> $GITHUB_ENV
        working-directory: .
      - name: Configure
        run: ./configure --disable-symbols --disable-shared --enable-zipfs
        working-directory: unix
      - name: Build
        run: |
          make tclsh tclzipfile
          make shell SCRIPT="$VER_PATH $GITHUB_ENV"
          echo "TCL_ZIP=`pwd`/`echo libtcl*.zip`" >> $GITHUB_ENV
        working-directory: unix
      - name: Package
        run: |
          cat ../unix/tclsh $TCL_ZIP > tclsh${TCL_PATCHLEVEL}_unofficial
          chmod +x tclsh${TCL_PATCHLEVEL}_unofficial
          tar -cf tclsh${TCL_PATCHLEVEL}_unofficial.tar tclsh${TCL_PATCHLEVEL}_unofficial
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Linux single-file build (unofficial)
          path: 1dist/*.tar
  macos:
    name: macOS
    runs-on: macos-latest
    defaults:
      run:
        shell: bash
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Checkout create-dmg
        uses: actions/checkout@v2
        with:
          repository: create-dmg/create-dmg
          ref: v1.0.8
          path: create-dmg
      - name: Prepare
        run: |
          mkdir 1dist
          touch generic/tclStubInit.c generic/tclOOStubInit.c || true
          echo "VER_PATH=$(cd tools; pwd)/addVerToFile.tcl" >> $GITHUB_ENV
          echo "CREATE_DMG=$(cd create-dmg;pwd)/create-dmg" >> $GITHUB_ENV
      - name: Configure
        run: ./configure --disable-symbols --disable-shared --enable-zipfs
        working-directory: unix
      - name: Build
        run: |
          make tclsh tclzipfile
          make shell SCRIPT="$VER_PATH $GITHUB_ENV"
          echo "TCL_BIN=`pwd`/tclsh" >> $GITHUB_ENV
          echo "TCL_ZIP=`pwd`/`echo libtcl*.zip`" >> $GITHUB_ENV
        working-directory: unix
      - name: Package
        run: |
          mkdir contents
          cat $TCL_BIN $TCL_ZIP > contents/tclsh${TCL_PATCHLEVEL}_unofficial
          chmod +x contents/tclsh${TCL_PATCHLEVEL}_unofficial
          cat > contents/README.txt <<EOF
          This is a single-file executable developer preview of Tcl $TCL_PATCHLEVEL

          It is not intended as an official release at all, so it is unsigned and unnotarized.
          Use strictly at your own risk.

          To run it, you need to copy the executable out and run:
              xattr -d com.apple.quarantine tclsh${TCL_PATCHLEVEL}_unofficial
          to mark the executable as runnable on your machine.
          EOF
          $CREATE_DMG \
              --volname "Tcl $TCL_PATCHLEVEL (unofficial)" \
              --window-pos 200 120 \
              --window-size 800 400 \
              "Tcl-$TCL_PATCHLEVEL-(unofficial).dmg" \
              "contents/"
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} macOS single-file build (unofficial)
          path: 1dist/*.dmg
  win:
    name: Windows
    runs-on: windows-latest
    defaults:
      run:
        shell: bash
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install MSYS2
        uses: msys2/setup-msys2@v2
      - name: Prepare
        run: |
          touch generic/tclStubInit.c generic/tclOOStubInit.c
          echo "VER_PATH=$(cd tools; pwd)/addVerToFile.tcl" >> $GITHUB_ENV
          mkdir 1dist
        working-directory: .
      - name: Configure
        run: ./configure --disable-symbols --disable-shared --enable-zipfs
        working-directory: win
      - name: Build
        run: |
          make binaries libraries tclzipfile
          echo "TCL_ZIP=`pwd`/`echo libtcl*.zip`" >> $GITHUB_ENV
        working-directory: win
      - name: Package
        run: |
          cat ../win/tclsh*.exe $TCL_ZIP > combined.exe
        working-directory: 1dist
      - name: Get Exact Version
        run: |
          ./combined.exe $VER_PATH $GITHUB_ENV
        working-directory: 1dist
      - name: Set Executable Name
        run: |
          mv combined.exe tclsh${TCL_PATCHLEVEL}_unofficial.exe
        working-directory: 1dist
      - name: Upload
        uses: actions/upload-artifact@v2
        with:
          name: Tclsh ${{ env.TCL_PATCHLEVEL }} Windows single-file build (unofficial)
          path: '1dist/*_unofficial.exe'

name: Windows
on: [push]
jobs:
  msvc:
    runs-on: windows-latest
    defaults:
      run:
        shell: powershell
        working-directory: win
    # Using powershell means we need to explicitly stop on failure
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Init MSVC
        uses: ilammy/msvc-dev-cmd@v1
      - name: Build
        run: |
          &nmake -f makefile.vc all
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
      - name: Build Test Harness
        run: |
          &nmake -f makefile.vc tcltest
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
      - name: Run Tests
        run: |
          &nmake -f makefile.vc test
          if ($lastexitcode -ne 0) {
             throw "nmake exit code: $lastexitcode"
          }
        env:
          ERROR_ON_FAILURES: 1
          CI_BUILD_WITH_MSVC: 1
  gcc:
    runs-on: windows-latest
    defaults:
      run:
        shell: bash
        working-directory: win
    strategy:
      matrix:
        cfgopt:
          - ""
          - "--disable-shared"
          - "--enable-symbols"
          - "--enable-symbols=mem"
    # Using powershell means we need to explicitly stop on failure
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install MSYS2 and Make
        run: choco install msys2 make
      - name: Prepare
        run: |
          touch tclStubInit.c tclOOStubInit.c tclOOScript.h
          mkdir "${HOME}/install dir"
        working-directory: generic
      - name: Configure ${{ matrix.cfgopt }}
        run: |
          ./configure ${CFGOPT} "--prefix=$HOME/install dir" || (cat config.log && exit 1)
        env:
          CFGOPT: --enable-64bit ${{ matrix.cfgopt }}
      - name: Build
        run: make all
      - name: Build Test Harness
        run: make tcltest
      - name: Run Tests
        run: make test
        env:
          ERROR_ON_FAILURES: 1

# If you add builds with Wine, be sure to define the environment variable
# CI_USING_WINE when running them so that broken tests know not to run.

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
	<name>tcl8</name>
	<comment></comment>
	<projects>
	</projects>
	<buildSpec>
		<buildCommand>
			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
			<triggers>clean,full,incremental,</triggers>
			<arguments>
			</arguments>
		</buildCommand>
		<buildCommand>
			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
			<triggers>full,incremental,</triggers>
			<arguments>
			</arguments>
		</buildCommand>
	</buildSpec>
	<natures>
		<nature>org.eclipse.cdt.core.cnature</nature>
		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
	</natures>
</projectDescription>

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=4"

    - name: "Linux/G++/Shared"
      os: linux
      dist: focal
      compiler: g++
      env:
        - BUILD_DIR=unix
        - CFGOPT="CC=g++ CFLAGS=-Dregister=dont+use+register"
# 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/Shared:NO_DEPRECATED"

      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
    - name: "macOS/Clang++/Xcode 12/Shared"
      os: osx
      osx_image: xcode12.2
      env:
        - BUILD_DIR=unix
        - CFGOPT="CC=clang++ --enable-framework --enable-dtrace CFLAGS=-Dregister=dont+use+register CPPFLAGS=-D__private_extern__=extern"
      script:
        - make all tcltest
# 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

    - 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
        - rm -rf tests/safe-stock8*.test
        - 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: UTF_MAX=4"

      compiler: cl
      env: *vcenv
      before_install: *vcpreinst
      install: []
      script:
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc all tcltest
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,msvcrt' '-f' makefile.vc test
    - name: "Windows/MSVC/StaticPackage"
      os: windows
      compiler: cl
      env: *vcenv
      before_install: *vcpreinst
      install: []
      script:
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,staticpkg,msvcrt' '-f' makefile.vc all tcltest
        - cmd.exe //C vcvarsall.bat x64 '&&' nmake 'OPTS=static,staticpkg,msvcrt' '-f' makefile.vc test
    - name: "Windows/MSVC/Debug"
      os: windows
      compiler: cl
      env: *vcenv
      before_install: *vcpreinst
      install: []
      script:

    - name: "Windows/GCC/Shared"
      os: windows
      compiler: gcc
      env:
        - BUILD_DIR=win
        - CFGOPT="--enable-64bit"
      before_install: &makepreinst
        - rm -rf tests/safe-stock8*.test
        - touch generic/tclStubInit.c generic/tclOOStubInit.c generic/tclOOScript.h
        - choco install -y make zip
        - cd ${BUILD_DIR}
    - name: "Windows/GCC/Shared: UTF_MAX=4"
      os: windows
      compiler: gcc
      env:
        - BUILD_DIR=win

      dist: focal
      compiler: gcc
      env:
        - BUILD_DIR=unix
      script:
        - make dist
before_install:
  - rm -rf tests/safe-stock8*.test
  - 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

	the .exp files and can remove use of #pragma export that never worked
	well)
	removed line continuation in #if clause as this breaks the mac
	resource compiler (note that *.r files include tcl.h)

	* mac/tclMacFile.c: fixed bug in permission checking code

	* mac/tclMacLoad.c: corrected utf-8 handling, comparison of package
	names to code fragment names changed to only match on the length of
	package name, this allows for fragment names with version numbers
	appended.

	* mac/tclMacInt.h:
	* generic/tclInt.h:
	* mac/tclMacTime.c:

	[Patch 403229]

2001-03-06  Donal K. Fellows  <fellowsd@cs.man.ac.uk>

	* generic/tclVar.c (Tcl_UnsetObjCmd): Rewrote argument parser to avoid
	a read off the end of the argument array that could occur when
	executing something like [unset -nocomplain] was executed. Improved
	the error message given when not enough arguments are given (-nocomplain
	should obviously be *before* --, not after it) and also modified the
	test suite to take account of that and the documentation to use the
	same improvement. [Bug 405769]

2001-03-02  Donal K. Fellows  <fellowsd@cs.man.ac.uk>

	* generic/tclExecute.c (TclExecuteByteCode): Fixed bug that could pass

2002-07-05  Don Porter  <dgp@users.sourceforge.net>

	* changes: added recent changes

2002-07-05  Reinhard Max  <max@suse.de>

	* generic/tclClock.c (FormatClock): Convert the format string to utf-8
	before calling TclpStrftime, so that non-ASCII characters don't get
	mangled when the result string is being converted back.
	* tests/clock.test: Added a test for that.

2002-07-05  Donal K. Fellows  <fellowsd@cs.man.ac.uk>

	* unix/Makefile.in (ro-test,ddd,GDB,DDD): Created new targets to

	variable instead of retrieving the string again. Fixes [Bug 835289].

	* doc/OpenFileChnl.3: Added description of the behaviour of
	Tcl_ReadChars when its 'charsToRead' argument is set to -1. Fixes [Bug
	934511].

	* doc/CrtCommand.3: Added note that the arguments given to the command
	proc of a Tcl_CreateCommand are in utf-8 since Tcl 8.1. Closing [Patch
	414778].

	* doc/ChnlStack.3: Removed the declaration that the interp argument to
	Tcl_(un)StackChannel can be NULL. This fixes [Bug 881220], reported by
	Marco Maggi <marcomaggi@users.sourceforge.net>.

	* tests/socket.test: Accepted two new testcases by Stuart Casoff

	rejecting the "fix" for "Bug" 945570. Tcl_FSSeek() needs the values of
	SEEK_SET, etc. and too many extensions rely on tcl.h providing stdio.h
	for them.

2004-06-02  Jeff Hobbs	<jeffh@ActiveState.com>

	* win/tclWinFile.c (TclpFindExecutable): when using GetModuleFileNameA
	(Win9x), convert from CP_ACP to WCHAR then convert back to utf-8.
	Adjunct to 2004-04-07 fix.

2004-06-02  David Gravereaux <davygrvy@pobox.com>

	* tests/winPipe.test (winpipe-6.1): blocking set to 1 before closing
	to ensure we get an exitcode. The windows pipe channel driver doesn't
	differentiate between a blocking and non-blocking close just yet, but

# README:  Tcl

This is the **Tcl 8.7a4** source distribution.

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

[![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)

## Contents
 1. [Introduction](#intro)
 2. [Documentation](#doc)
 3. [Compiling and installing Tcl](#build)
 4. [Development tools](#devtools)
 5. [Tcl newsgroup](#complangtcl)

When paired with the Tk toolkit, Tcl provides the fastest and most powerful
way to create GUI applications that run on PCs, Unix, and Mac OS X.
Tcl can also be used for a variety of web-related tasks and for creating
powerful command languages for applications.

Tcl is maintained, enhanced, and distributed freely by the Tcl community.
Source code development and tracking of bug reports and feature requests
take place at [core.tcl-lang.org](https://core.tcl-lang.org/).
Tcl/Tk release and mailing list services are [hosted by
SourceForge](https://sourceforge.net/projects/tcl/)
with the Tcl Developer Xchange hosted at
[www.tcl-lang.org](https://www.tcl-lang.org).

Tcl is a freely available open-source package.  You can do virtually
anything you like with it, such as modifying it, redistributing it,
and selling it either in whole or in part.  See the file
`license.terms` for complete information.

## <a id="doc">2.</a> Documentation
Extensive documentation is available on our website.
The home page for this release, including new features, is
[here](https://www.tcl.tk/software/tcltk/8.7.html).
Detailed release notes can be found at the
[file distributions page](https://sourceforge.net/projects/tcl/files/Tcl/)
by clicking on the relevant version.

Information about Tcl itself can be found at the [Developer

## <a id="build">3.</a> Compiling and installing Tcl
There are brief notes in the `unix/README`, `win/README`, and `macosx/README`
about compiling on these different platforms.  There is additional information
about building Tcl from sources
[online](https://www.tcl-lang.org/doc/howto/compile.html).

## <a id="devtools">4.</a> Development tools
ActiveState produces a high-quality set of commercial quality development
tools that is available to accelerate your Tcl application development.
Tcl Dev Kit builds on the earlier TclPro toolset and provides a debugger,
static code checker, single-file wrapping utility, bytecode compiler, and
more.  More information can be found at

	http://www.ActiveState.com/Tcl

## <a id="complangtcl">5.</a> Tcl newsgroup
There is a USENET newsgroup, "`comp.lang.tcl`", intended for the exchange of
information about Tcl, Tk, and related applications.  The newsgroup is a
great place to ask general information questions.  For bug reports, please
see the "Support and bug fixes" section below.

## <a id="wiki">6.</a> Tcl'ers Wiki
There is a [wiki-based open community site](https://wiki.tcl-lang.org/)
covering all aspects of Tcl/Tk.

 * 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);

'\"
'\" Copyright (c) 1995-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH Tcl_CreateAlias 3 7.6 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
Tcl_IsSafe, Tcl_MakeSafe, Tcl_CreateChild, Tcl_CreateSlave, Tcl_GetChild, Tcl_GetSlave, Tcl_GetParent, Tcl_GetMaster, Tcl_GetInterpPath, Tcl_CreateAlias, Tcl_CreateAliasObj, Tcl_GetAlias, Tcl_GetAliasObj, Tcl_ExposeCommand, Tcl_HideCommand \- manage multiple Tcl interpreters, aliases and hidden commands
.SH SYNOPSIS
.nf
\fB#include <tcl.h>\fR
.sp
int
\fBTcl_IsSafe\fR(\fIinterp\fR)
.sp
int
\fBTcl_MakeSafe\fR(\fIinterp\fR)
.sp
Tcl_Interp *
\fBTcl_CreateChild\fR(\fIinterp, name, isSafe\fR)
.sp
Tcl_Interp *
\fBTcl_CreateSlave\fR(\fIinterp, name, isSafe\fR)
.sp
Tcl_Interp *
\fBTcl_GetSlave\fR(\fIinterp, name\fR)
.sp
Tcl_Interp *
\fBTcl_GetChild\fR(\fIinterp, name\fR)
.sp
Tcl_Interp *
\fBTcl_GetMaster\fR(\fIinterp\fR)
.sp
Tcl_Interp *
\fBTcl_GetParent\fR(\fIinterp\fR)
.sp
int
\fBTcl_GetInterpPath\fR(\fIinterp, childInterp\fR)
.sp
int
\fBTcl_CreateAlias\fR(\fIchildInterp, childCmd, targetInterp, targetCmd,
                argc, argv\fR)
.sp
int
\fBTcl_CreateAliasObj\fR(\fIchildInterp, childCmd, targetInterp, targetCmd,
                   objc, objv\fR)
.sp
int
\fBTcl_GetAlias\fR(\fIinterp, childCmd, targetInterpPtr, targetCmdPtr,
             argcPtr, argvPtr\fR)
.sp
int
\fBTcl_GetAliasObj\fR(\fIinterp, childCmd, targetInterpPtr, targetCmdPtr,
                objcPtr, objvPtr\fR)
.sp
int
\fBTcl_ExposeCommand\fR(\fIinterp, hiddenCmdName, cmdName\fR)
.sp
int
\fBTcl_HideCommand\fR(\fIinterp, cmdName, hiddenCmdName\fR)
.SH ARGUMENTS
.AS "const char *const" **targetInterpPtr out
.AP Tcl_Interp *interp in
Interpreter in which to execute the specified command.
.AP "const char" *name in
Name of child interpreter to create or manipulate.
.AP int isSafe in
If non-zero, a
.QW safe
child that is suitable for running untrusted code
is created, otherwise a trusted child is created.
.AP Tcl_Interp *childInterp in
Interpreter to use for creating the source command for an alias (see
below).
.AP "const char" *childCmd in
Name of source command for alias.
.AP Tcl_Interp *targetInterp in
Interpreter that contains the target command for an alias.
.AP "const char" *targetCmd in
Name of target command for alias in \fItargetInterp\fR.
.AP int argc in
Count of additional arguments to pass to the alias command.

facility from inside C programs. They enable managing multiple interpreters
in a hierarchical relationship, and the management of aliases, commands
that when invoked in one interpreter execute a command in another
interpreter. The return value for those procedures that return an \fBint\fR
is either \fBTCL_OK\fR or \fBTCL_ERROR\fR. If \fBTCL_ERROR\fR is returned
then the interpreter's result contains an error message.
.PP
\fBTcl_CreateChild\fR creates a new interpreter as a child of \fIinterp\fR.
It also creates a child command named \fIname\fR in \fIinterp\fR which
allows \fIinterp\fR to manipulate the new child.
If \fIisSafe\fR is zero, the command creates a trusted child in which Tcl
code has access to all the Tcl commands.
If it is \fB1\fR, the command creates a
.QW safe
child in which Tcl code has access only to set of Tcl commands defined as
.QW "Safe Tcl" ;
see the manual entry for the Tcl \fBinterp\fR command for details.
If the creation of the new child interpreter failed, \fBNULL\fR is returned.
.PP
\fBTcl_CreateSlave\fR is a synonym for \fBTcl_CreateChild\fR.
.PP
\fBTcl_IsSafe\fR returns \fB1\fR if \fIinterp\fR is
.QW safe
(was created with the \fBTCL_SAFE_INTERPRETER\fR flag specified),
\fB0\fR otherwise.
.PP
\fBTcl_MakeSafe\fR marks \fIinterp\fR as
.QW safe ,
so that future
calls to \fBTcl_IsSafe\fR will return 1.  It also removes all known
potentially-unsafe core functionality (both commands and variables)
from \fIinterp\fR.  However, it cannot know what parts of an extension
or application are safe and does not make any attempt to remove those
parts, so safety is not guaranteed after calling \fBTcl_MakeSafe\fR.
Callers will want to take care with their use of \fBTcl_MakeSafe\fR
to avoid false claims of safety.  For many situations, \fBTcl_CreateChild\fR
may be a better choice, since it creates interpreters in a known-safe state.
.PP
\fBTcl_GetChild\fR returns a pointer to a child interpreter of
\fIinterp\fR. The child interpreter is identified by \fIname\fR.
If no such child interpreter exists, \fBNULL\fR is returned.
.PP
\fBTcl_GetSlave\fR is a synonym for \fBTcl_GetChild\fR.
.PP
\fBTcl_GetParent\fR returns a pointer to the parent interpreter of
\fIinterp\fR. If \fIinterp\fR has no parent (it is a
top-level interpreter) then \fBNULL\fR is returned.
.PP
\fBTcl_GetMaster\fR is a synonym for \fBTcl_GetParent\fR.
.PP
\fBTcl_GetInterpPath\fR stores in the result of \fIinterp\fR
the relative path between \fIinterp\fR and \fIchildInterp\fR;
\fIchildInterp\fR must be a child of \fIinterp\fR. If the computation
of the relative path succeeds, \fBTCL_OK\fR is returned, else
\fBTCL_ERROR\fR is returned and an error message is stored as the
result of \fIinterp\fR.
.PP
\fBTcl_CreateAlias\fR creates a command named \fIchildCmd\fR in
\fIchildInterp\fR that when invoked, will cause the command \fItargetCmd\fR
to be invoked in \fItargetInterp\fR. The arguments specified by the strings
contained in \fIargv\fR are always prepended to any arguments supplied in the
invocation of \fIchildCmd\fR and passed to \fItargetCmd\fR.
This operation returns \fBTCL_OK\fR if it succeeds, or \fBTCL_ERROR\fR if
it fails; in that case, an error message is left in the value result
of \fIchildInterp\fR.
Note that there are no restrictions on the ancestry relationship (as
created by \fBTcl_CreateChild\fR) between \fIchildInterp\fR and
\fItargetInterp\fR. Any two interpreters can be used, without any
restrictions on how they are related.
.PP
\fBTcl_CreateAliasObj\fR is similar to \fBTcl_CreateAlias\fR except
that it takes a vector of values to pass as additional arguments instead
of a vector of strings.
.PP

For a description of the Tcl interface to multiple interpreters, see
\fIinterp(n)\fR.
.SH "SEE ALSO"
interp

.SH KEYWORDS
alias, command, exposed commands, hidden commands, interpreter, invoke,
parent, child

outside this range, \fBTcl_SetChannelBufferSize\fR sets the buffer size to
4096.
.PP
\fBTcl_NotifyChannel\fR is called by a channel driver to indicate to
the generic layer that the events specified by \fImask\fR have
occurred on the channel.  Channel drivers are responsible for invoking
this function whenever the channel handlers need to be called for the
channel (or other pending tasks like a write flush should be performed).
See \fBWATCHPROC\fR below for more details.
.PP
\fBTcl_BadChannelOption\fR is called from driver specific
\fIsetOptionProc\fR or \fIgetOptionProc\fR to generate a complete
error message.
.PP
\fBTcl_ChannelBuffered\fR returns the number of bytes of input
currently buffered in the internal buffer (push back area) of the

'\"
'\" Copyright (c) 1989-1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2002 Kevin B. Kenny <kennykb@acm.org>.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH Tcl_CreateTrace 3 "" Tcl "Tcl Library Procedures"
.so man.macros
.BS

'\"
'\" Copyright (c) 1992-1999 Karl Lehenbauer & Mark Diekhans.
'\" Copyright (c) 2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH "Tcl_DumpActiveMemory" 3 8.1 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
Tcl_DumpActiveMemory, Tcl_InitMemory, Tcl_ValidateAllMemory \- Validated memory allocation interface

accumulates the return values in a list which is returned to the
caller (with a reference count of 0).
.PP
\fBTcl_FSEvalFileEx\fR reads the file given by \fIpathPtr\fR using
the encoding identified by \fIencodingName\fR and evaluates
its contents as a Tcl script. It returns the same information as
\fBTcl_EvalObjEx\fR.
If \fIencodingName\fR is NULL, the utf-8 encoding is used for
reading the file contents.
If the file could not be read then a Tcl error is returned to describe
why the file could not be read.
The eofchar for files is
.QW \e32
(^Z) for all platforms.
If you require a
.QW ^Z
in code for string comparison, you can use
.QW \e032
or
.QW \eu001a ,
which will be safely substituted by the Tcl interpreter into
.QW ^Z .
\fBTcl_FSEvalFile\fR is a simpler version of
\fBTcl_FSEvalFileEx\fR that always uses the utf-8 encoding
when reading the file.
.PP
\fBTcl_FSLoadFile\fR dynamically loads a binary code file into memory and
returns the addresses of two procedures within that file, if they are
defined. The appropriate function for the filesystem to which \fIpathPtr\fR
belongs will be called. If that filesystem does not implement this
function (most virtual filesystems will not, because of OS limitations

.PP
The result should be a list of volumes added by this filesystem, or
NULL (or an empty list) if no volumes are provided. The result value
is considered to be owned by the filesystem (not by Tcl's core), but
should be given a reference count for Tcl. Tcl will use the contents of the
list and then decrement that reference count. This allows filesystems to
choose whether they actually want to retain a
.QW "global list"
of volumes
or not (if not, they generate the list on the fly and pass it to Tcl
with a reference count of 1 and then forget about the list, if yes, then
they simply increment the reference count of their global list and pass it
to Tcl which will copy the contents and then decrement the count back
to where it was).
.PP
Therefore, Tcl considers return values from this proc to be read-only.
.SS FILEATTRSTRINGSPROC
.PP
Function to list all attribute strings which are valid for this

'\"
'\" Copyright (c) 1998-2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH Tcl_GetHostName 3 8.3 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
Tcl_GetHostName \- get the name of the local host

.SH ARGUMENTS
.AS "const char" *structTablePtr in/out
.AP Tcl_Interp *interp in
Interpreter to use for error reporting; if NULL, then no message is
provided on errors.
.AP Tcl_Obj *objPtr in/out
The string value of this value is used to search through \fItablePtr\fR.
If the \fBTCL_INDEX_TEMP_TABLE\fR flag is not specified,
the internal representation is modified to hold the index of the matching
table entry.
.AP "const char *const" *tablePtr in
An array of null-terminated strings.  The end of the array is marked
by a NULL string pointer.
Note that, unless the \fBTCL_INDEX_TEMP_TABLE\fR flag is specified,
references to the \fItablePtr\fR may be retained in the
internal representation of \fIobjPtr\fR, so this should represent the
address of a statically-allocated array.
.AP "const void" *structTablePtr in
An array of arbitrary type, typically some \fBstruct\fR type.
The first member of the structure must be a null-terminated string.
The size of the structure is given by \fIoffset\fR.
Note that, unless the \fBTCL_INDEX_TEMP_TABLE\fR flag is specified,
references to the \fIstructTablePtr\fR may be retained in the
internal representation of \fIobjPtr\fR, so this should represent the
address of a statically-allocated array of structures.
.AP int offset in
The offset to add to structTablePtr to get to the next entry.
The end of the array is marked by a NULL string pointer.
.AP "const char" *msg in
Null-terminated string describing what is being looked up, such as
\fBoption\fR.  This string is included in error messages.
.AP int flags in
OR-ed combination of bits providing additional information for
operation.  The only bits that are currently defined are \fBTCL_EXACT\fR
and \fBTCL_INDEX_TEMP_TABLE\fR.
.AP int *indexPtr out
The index of the string in \fItablePtr\fR that matches the value of
\fIobjPtr\fR is returned here.
.BE
.SH DESCRIPTION
.PP
These procedures provide an efficient way for looking up keywords,

If there is no matching entry,
\fBTCL_ERROR\fR is returned and an error message is left in \fIinterp\fR's
result if \fIinterp\fR is not NULL.  \fIMsg\fR is included in the
error message to indicate what was being looked up.  For example,
if \fImsg\fR is \fBoption\fR the error message will have a form like
.QW "\fBbad option \N'34'firt\N'34': must be first, second, or third\fR" .
.PP
If the \fBTCL_INDEX_TEMP_TABLE\fR was not specified, when
\fBTcl_GetIndexFromObj\fR completes successfully it modifies the
internal representation of \fIobjPtr\fR to hold the address of
the table and the index of the matching entry.  If \fBTcl_GetIndexFromObj\fR
is invoked again with the same \fIobjPtr\fR and \fItablePtr\fR
arguments (e.g. during a reinvocation of a Tcl command), it returns
the matching index immediately without having to redo the lookup
operation.  Note: \fBTcl_GetIndexFromObj\fR assumes that the entries
in \fItablePtr\fR are static: they must not change between
invocations.  This caching mechanism can be disallowed by specifying
the \fBTCL_INDEX_TEMP_TABLE\fR flag.
If the value of \fIobjPtr\fR is the empty string,
\fBTcl_GetIndexFromObj\fR will treat it as a non-matching value
and return \fBTCL_ERROR\fR.
.PP
\fBTcl_GetIndexFromObjStruct\fR works just like
\fBTcl_GetIndexFromObj\fR, except that instead of treating
\fItablePtr\fR as an array of string pointers, it treats it as a
pointer to the first string in a series of strings that have

'\"
'\" Copyright (c) 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.
'\"
.TH Tcl_GetStdChannel 3 7.5 Tcl "Tcl Library Procedures"
.so man.macros
.BS

'\"
'\" Copyright (c) 2001 Kevin B. Kenny <kennykb@acm.org>.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH Tcl_GetTime 3 8.4 Tcl "Tcl Library Procedures"
.so man.macros
.BS

'\"
'\" Copyright (c) 1998-2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH Tcl_Init 3 8.0 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
Tcl_Init \- find and source initialization script

the interpreter to permit it to continue processing longer.
.PP
When a limit is exceeded (and the callbacks have run; the order of
execution of the callbacks is unspecified) execution in the limited
interpreter is stopped by raising an error and setting a flag that
prevents the \fBcatch\fR command in that interpreter from trapping
that error.  It is up to the context that started execution in that
interpreter (typically the main interpreter) to handle the error.
.SH "LIMIT CHECKING API"
.PP
To check the resource limits for an interpreter, call
\fBTcl_LimitCheck\fR, which returns \fBTCL_OK\fR if the limit was not
exceeded (after processing callbacks) and \fBTCL_ERROR\fR if the limit was
exceeded (in which case an error message is also placed in the
interpreter result).  That function should only be called when

.\"
.\" Copyright (c) 2008 Kevin B. Kenny.
.\" Copyright (c) 2018 Nathan Coulter.
.\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH NRE 3 8.6 Tcl "Tcl Library Procedures"
.so man.macros
.BS

implement looping and sequencing constructs using the function stack.
.PP
.SH "SEE ALSO"
Tcl_CreateCommand(3), Tcl_CreateObjCommand(3), Tcl_EvalObjEx(3), Tcl_GetCommandFromObj(3), Tcl_ExprObj(3)
.SH KEYWORDS
stackless, nonrecursive, execute, command, global, value, result, script
.SH COPYRIGHT
Copyright \(co 2008 Kevin B. Kenny.
Copyright \(co 2018 Nathan Coulter.

'\"
'\" Copyright (c) 1997 Sun Microsystems, Inc.
'\" Contributions from Don Porter, NIST, 2004. (not subject to US copyright)
'\" Copyright (c) 2018 Nathan Coulter.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH Tcl_SaveResult 3 8.1 Tcl "Tcl Library Procedures"

'\"
'\" Copyright (c) 1998-2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH Tcl_SourceRCFile 3 8.3 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
Tcl_SourceRCFile \- source the Tcl rc file

'\"
'\" Copyright (c) 2001 ActiveState Corporation
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH "Standard Channels" 3 7.5 Tcl "Tcl Library Procedures"
.so man.macros
.BS

'\"
'\" Copyright (c) 1992-1999 Karl Lehenbauer & Mark Diekhans.
'\" Copyright (c) 2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH TCL_MEM_DEBUG 3 8.1 Tcl "Tcl Library Procedures"
.so man.macros
.BS
.SH NAME
TCL_MEM_DEBUG \- Compile-time flag to enable Tcl memory debugging

twenty-one-bit hexadecimal value for the Unicode character that will be
inserted, in the range U+000000\(enU+10FFFF.  The parser will stop just
before this range overflows, or when the maximum of eight digits
is reached.  The upper bits of the Unicode character will be 0.
.RS
.PP
The range U+00D800\(enU+00DFFF is reserved for surrogates, which
are illegal on their own. Therefore, such sequences will result in
the replacement character U+FFFD. Surrogate pairs should be
encoded as single \e\fBU\fIhhhhhhhh\fR character.
.RE
.PP
Backslash substitution is not performed on words enclosed in braces,
except for backslash-newline as described above.
.RE

.PP
\fBTcl_Main\fR is not provided by the public interface of Tcl's
stub library.  Programs that call \fBTcl_Main\fR must be linked
against the standard Tcl library.  Extensions (stub-enabled or
not) are not intended to call \fBTcl_Main\fR.
.PP
\fBTcl_Main\fR is not thread-safe.  It should only be called by
a single main thread of a multi-threaded application.  This
restriction is not a problem with normal use described above.
.PP
\fBTcl_Main\fR and therefore all applications based upon it, like
\fBtclsh\fR, use \fBTcl_GetStdChannel\fR to initialize the standard
channels to their default values. See \fBTcl_StandardChannels\fR for
more information.
.PP

and the stored encoding name is written to space pointed to
by \fIencodingPtr\fR, when that is not NULL.
.PP
The file name and encoding values managed by the routines
\fBTcl_SetStartupScript\fR and \fBTcl_GetStartupScript\fR
are stored per-thread.  Although the storage and retrieval
functions of these routines work in any thread, only those
calls in the same main thread as \fBTcl_Main\fR can have
any influence on it.
.PP
The caller of \fBTcl_Main\fR may call \fBTcl_SetStartupScript\fR
first to establish its desired startup script.  If \fBTcl_Main\fR
finds that no such startup script has been established, it consults
the first few arguments in \fIargv\fR.  If they match
?\fB\-encoding \fIname\fR? \fIfileName\fR,
where \fIfileName\fR does not begin with the character \fI\-\fR,
then \fIfileName\fR is taken to be the name of a file containing
a \fIstartup script\fR, and \fIname\fR is taken to be the name
of the encoding of the contents of that file.  \fBTcl_Main\fR
then calls \fBTcl_SetStartupScript\fR with these values.
.PP
\fBTcl_Main\fR then defines in its main interpreter
the Tcl variables \fIargc\fR, \fIargv\fR, \fIargv0\fR, and
\fItcl_interactive\fR, as described in the documentation for \fBtclsh\fR.
.PP
When it has finished its own initialization, but before it processes
commands, \fBTcl_Main\fR calls the procedure given by the
\fIappInitProc\fR argument.  This procedure provides a
.QW hook

details on this procedure, see the documentation for \fBTcl_AppInit\fR.
.PP
When the \fIappInitProc\fR is finished, \fBTcl_Main\fR calls
\fBTcl_GetStartupScript\fR to determine what startup script has
been requested, if any.  If a startup script has been provided,
\fBTcl_Main\fR attempts to evaluate it.  Otherwise, interactive
mode begins with examination of the variable \fItcl_rcFileName\fR
in the main interpreter.  If that variable exists and holds the
name of a readable file, the contents of that file are evaluated
in the main interpreter.  Then interactive operations begin,
with prompts and command evaluation results written to the standard
output channel, and commands read from the standard input channel
and then evaluated.  The prompts written to the standard output
channel may be customized by defining the Tcl variables \fItcl_prompt1\fR
and \fItcl_prompt2\fR as described in the documentation for \fBtclsh\fR.
The prompts and command evaluation results are written to the standard
output channel only if the Tcl variable \fItcl_interactive\fR in the
main interpreter holds a non-zero integer value.
.PP
\fBTcl_SetMainLoop\fR allows setting an event loop procedure to be run.
This allows, for example, Tk to be dynamically loaded and set its event
loop.  The event loop will run following the startup script.  If you
are in interactive mode, setting the main loop procedure will cause the
prompt to become fileevent based and then the loop procedure is called.
When the loop procedure returns in interactive mode, interactive operation

'\"
'\" Copyright (c) 1997 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH Tcl_UtfToUpper 3 "8.1" Tcl "Tcl Library Procedures"
.so man.macros
.BS

'\"
'\" Copyright (c) 1997 Sun Microsystems, Inc.
'\" Copyright (c) 2008 Donal K. Fellows
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH binary n 8.0 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

.CS
\fBbinary scan\fR \ex70\ex87\ex05 B5B* var1 var2
.CE
.PP
will return \fB2\fR with \fB01110\fR stored in \fIvar1\fR and
\fB1000011100000101\fR stored in \fIvar2\fR.
.RE
.IP \fBC\fR 5
This form is similar to \fBA\fR, except that it scans the data from start
and terminates at the first null (C string semantics). For example,
.RS
.CS
\fBbinary scan\fR "abc\e000efghi" C* var1
.CE
will return \fB1\fR with \fBabc\fR stored in \fIvar1\fR.
.RE
.IP \fBH\fR 5
The data is turned into a string of \fIcount\fR hexadecimal digits in
high-to-low order represented as a sequence of characters in the set
.QW 0123456789abcdef .
The data bytes are scanned in first to last
order with the hex digits being taken in high-to-low order within each
byte. Any extra bits in the last byte are ignored. If \fIcount\fR is

set f [open somefile.txt r+]
\fBchan configure\fR $f -encoding cp1252
set offset 0

\fI# Search for string "FOOBAR" in the file\fR
while {[\fBchan gets\fR $f line] >= 0} {
    set idx [string first FOOBAR $line]
    if {$idx >= 0} {
        \fI# Found it; rewrite line\fR

        \fBchan seek\fR $f [expr {$offset + $idx}]
        \fBchan puts\fR -nonewline $f BARFOO

        \fI# Skip to end of following line, and truncate\fR
        \fBchan gets\fR $f

differences and the correct date is given when going from the end
of a long month to a short month.
.SH "SEE ALSO"
msgcat(n)
.SH KEYWORDS
clock, date, time
.SH "COPYRIGHT"
Copyright \(co 2004 Kevin B. Kenny <kennykb@acm.org>. All rights reserved.
'\" Local Variables:
'\" mode: nroff
'\" End:

The key rule only matches those key/value pairs whose keys match any
of the given patterns (in the style of \fBstring match\fR.)
.TP
\fBdict filter \fIdictionaryValue \fBscript {\fIkeyVariable valueVariable\fB} \fIscript\fR
.
The script rule tests for matching by assigning the key to the
\fIkeyVariable\fR and the value to the \fIvalueVariable\fR, and then evaluating
the given script which should result in a boolean value (with the
key/value pair only being included in the result of the \fBdict
filter\fR when a true value is returned.)  Note that the first
argument after the rule selection word is a two-element list.  If the
\fIscript\fR returns with a condition of \fBTCL_BREAK\fR, no further
key/value pairs are considered for inclusion in the resulting
dictionary, and a condition of \fBTCL_CONTINUE\fR is equivalent to a false
result. The key/value pairs are tested in the order in which the keys

'\"
'\" Copyright (c) 1998 Scriptics Corporation.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH encoding n "8.1" Tcl "Tcl Built-In Commands"
.so man.macros
.BS

accept arguments with forward slashes only as option delimiters and
backslashes only in paths.  Any arguments to an application that specify a
path name with forward slashes will not automatically be converted to use
the backslash character.  If an argument contains forward slashes as the
path separator, it may or may not be recognized as a path name, depending on
the program.
.PP









Two or more forward or backward slashes in a row in a path refer to a
network path.  For example, a simple concatenation of the root directory
\fBc:/\fR with a subdirectory \fB/windows/system\fR will yield
\fBc://windows/system\fR (two slashes together), which refers to the mount
point called \fBsystem\fR on the machine called \fBwindows\fR (and the
\fBc:/\fR is ignored), and is not equivalent to \fBc:/windows/system\fR,
which describes a directory on the current computer.  The \fBfile join\fR

application name, the following directories are automatically searched in
order when attempting to locate the application:
.IP \(bu 3
The directory from which the Tcl executable was loaded.
.IP \(bu 3
The current directory.
.IP \(bu 3
The Windows 32-bit system directory.
.IP \(bu 3


The Windows home directory.
.IP \(bu 3
The directories listed in the path.
.PP
In order to execute shell built-in commands like \fBdir\fR and \fBcopy\fR,
the caller must prepend the desired command with
.QW "\fBcmd.exe /c\0\fR"
because built-in commands are not implemented using executables.

'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-2000 Sun Microsystems, Inc.
'\" Copyright (c) 2005 Kevin B. Kenny <kennykb@acm.org>. All rights reserved
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH expr n 8.5 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

non-numeric operands, string comparisons, and some
additional operators not found in C.
.PP
When an expression evaluates to an integer, the value is the decimal form of
the integer, and when an expression evaluates to a floating-point number, the
value is the form produced by the \fB%g\fR format specifier of Tcl's
\fBformat\fR command.
.PP
.VS "TIP 582"
You can use \fB#\fR at any point in the expression (except inside double
quotes or braces) to start a comment. Comments last to the end of the line or
the end of the expression, whichever comes first.
.VE "TIP 582"
.SS OPERANDS
.PP
An expression consists of a combination of operands, operators, parentheses and
commas, possibly with whitespace between any of these elements, which is
ignored.
.PP
An operand may be specified in any of the following ways:

.PP
Below are some examples of simple expressions where the value of \fBa\fR is 3
and the value of \fBb\fR is 6.  The command on the left side of each line
produces the value on the right side.
.PP
.CS
.ta 9c
\fBexpr\fR {3.1 + $a}	\fI6.1\fR
\fBexpr\fR {2 + "$a.$b"}	\fI5.6\fR
\fBexpr\fR {4*[llength "6 2"]}	\fI8\fR
\fBexpr\fR {{word one} < "word $a"}	\fI0\fR
.CE
.PP
\fBInteger value\fR
.PP
An integer operand may be specified in decimal (the normal case, the optional
first two characters are \fB0d\fR), binary

.PP
As in C, \fB&&\fR, \fB||\fR, and \fB?:\fR feature
.QW "lazy evaluation" ,
which means that operands are not evaluated if they are
not needed to determine the outcome.  For example, in
.PP
.CS
\fBexpr\fR {$v?[a]:[b]}
.CE
.PP
only one of \fB[a]\fR or \fB[b]\fR is evaluated,
depending on the value of \fB$v\fR.  This is not true of the normal Tcl parser,
so it is normally recommended to enclose the arguments to \fBexpr\fR in braces.
Without braces, as in
\fBexpr\fR $v ? [a] : [b]

.CE
.PP
Set a variable indicating whether an environment variable is defined and has
value of true:
.PP
.CS
set isTrue [\fBexpr\fR {
    # Does the environment variable exist, and...
    [info exists ::env(SOME_ENV_VAR)] &&
    # ...does it contain a proper true value?
    [string is true -strict $::env(SOME_ENV_VAR)]
}]
.CE
.PP
Generate a random integer in the range 0..99 inclusive:
.PP
.CS
set randNum [\fBexpr\fR { int(100 * rand()) }]
.CE
.SH "SEE ALSO"
array(n), for(n), if(n), mathfunc(n), mathop(n), namespace(n), proc(n),
string(n), Tcl(n), while(n)
.SH KEYWORDS
arithmetic, boolean, compare, expression, fuzzy comparison, integer value
.SH COPYRIGHT
.nf
Copyright \(co 1993 The Regents of the University of California.
Copyright \(co 1994-2000 Sun Microsystems Incorporated.
Copyright \(co 2005 Kevin B. Kenny <kennykb@acm.org>. All rights reserved.
.fi
'\" Local Variables:
'\" mode: nroff
'\" fill-column: 78
'\" End:

'\"
'\" Copyright (c) 2018 Kevin B. Kenny <kennykb@acm.org>. All rights reserved
'\" Copyright (c) 2019 Donal Fellows
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH fpclassify n 8.7 Tcl "Tcl Float Classifier"
.so man.macros
.BS

'\"
'\" Copyright (c) 1995-1997 Sun Microsystems, Inc.
'\" Copyright (c) 1998-2000 Ajuba Solutions.
'\" Copyright (c) 2004 ActiveState Corporation.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH "http" n 2.9 http "Tcl Bundled Packages"
.so man.macros

the HTTP operation is done in the background.
\fB::http::geturl\fR returns immediately after generating the
HTTP request and the callback is invoked
when the transaction completes.  For this to work, the Tcl event loop
must be active.  In Tk applications this is always true.  For pure-Tcl
applications, the caller can use \fB::http::wait\fR after calling
\fB::http::geturl\fR to start the event loop.
.PP
\fBNote:\fR The event queue is even used without the \fB-command\fR option.
As a side effect, arbitrary commands may be processed while \fBhttp::geturl\fR is running.
.SH COMMANDS
.TP
\fB::http::config\fR ?\fIoptions\fR?
.
The \fB::http::config\fR command is used to set and query the name of the
proxy server and port, and the User-Agent name used in the HTTP
requests.  If no options are specified, then the current configuration

Select the HTTP protocol version to use. This should be 1.0 or 1.1 (the
default). Should only be necessary for servers that do not understand or
otherwise complain about HTTP/1.1.
.TP
\fB\-query\fR \fIquery\fR
.
This flag causes \fB::http::geturl\fR to do a POST request that passes the
\fIquery\fR as payload verbatim to the server.
The content format (and encoding) of \fIquery\fR is announced by the header
field \fBcontent-type\fR set by the option \fB-type\fR.
\fIquery\fR is an x-url-encoding formatted query, if used for html forms.
The \fB::http::formatQuery\fR procedure can be used to do the formatting.

.TP
\fB\-queryblocksize\fR \fIsize\fR
.
The block size used when posting query data to the URL.
At most
\fIsize\fR
bytes are written at once.  After each block, a call to the

If the server closes the socket without replying, then no error
is raised, but the status of the transaction will be \fBeof\fR.
.TP
\fBerror\fR
.
The error message will also be stored in the \fBerror\fR status
array element, accessible via \fB::http::error\fR.
.TP
\fBtimeout\fR
.
A timeout occurred before the transaction could complete
.TP
\fBreset\fR
.
user-reset
.PP
Another error possibility is that \fB::http::geturl\fR is unable to
write all the post query data to the server before the server
responds and closes the socket.
The error message is saved in the \fBposterror\fR status array
element and then  \fB::http::geturl\fR attempts to complete the
transaction.

\fBposterror\fR
.
The error, if any, that occurred while writing
the post query data to the server.
.TP
\fBstatus\fR
.
See description in the chapter \fBERRORS\fR above for a
list and description of \fBstatus\fR.

During the transaction this value is the empty string.
.TP
\fBtotalsize\fR
.
A copy of the \fBContent-Length\fR meta-data value.
.TP
\fBtype\fR
.

.SH SYNOPSIS
\fBinterp \fIsubcommand \fR?\fIarg arg ...\fR?
.BE
.SH DESCRIPTION
.PP
This command makes it possible to create one or more new Tcl
interpreters that co-exist with the creating interpreter in the
same application.  The creating interpreter is called the \fIparent\fR
and the new interpreter is called a \fIchild\fR.
A parent can create any number of children, and each child can
itself create additional children for which it is parent, resulting
in a hierarchy of interpreters.
.PP
Each interpreter is independent from the others: it has its own name
space for commands, procedures, and global variables.
A parent interpreter may create connections between its children and
itself using a mechanism called an \fIalias\fR.  An \fIalias\fR is
a command in a child interpreter which, when invoked, causes a
command to be invoked in its parent interpreter or in another child
interpreter.  The only other connections between interpreters are
through environment variables (the \fBenv\fR variable), which are
normally shared among all interpreters in the application,
and by resource limit exceeded callbacks. Note that the
name space for files (such as the names returned by the \fBopen\fR command)
is no longer shared between interpreters. Explicit commands are provided to
share files and to transfer references to open files from one interpreter
to another.
.PP
The \fBinterp\fR command also provides support for \fIsafe\fR
interpreters.  A safe interpreter is a child whose functions have
been greatly restricted, so that it is safe to execute untrusted
scripts without fear of them damaging other interpreters or the
application's environment. For example, all IO channel creation
commands and subprocess creation commands are made inaccessible to safe
interpreters.
See \fBSAFE INTERPRETERS\fR below for more information on
what features are present in a safe interpreter.
The dangerous functionality is not removed from the safe interpreter;
instead, it is \fIhidden\fR, so that only trusted interpreters can obtain
access to it. For a detailed explanation of hidden commands, see
\fBHIDDEN COMMANDS\fR, below.
The alias mechanism can be used for protected communication (analogous to a
kernel call) between a child interpreter and its parent.
See \fBALIAS INVOCATION\fR, below, for more details
on how the alias mechanism works.
.PP
A qualified interpreter name is a proper Tcl list containing a subset of its
ancestors in the interpreter hierarchy, terminated by the string naming the
interpreter in its immediate parent. Interpreter names are relative to the
interpreter in which they are used. For example, if
.QW \fBa\fR
is a child of the current interpreter and it has a child
.QW \fBa1\fR ,
which in turn has a child
.QW \fBa11\fR ,
the qualified name of
.QW \fBa11\fR
in
.QW \fBa\fR
is the list
.QW "\fBa1 a11\fR" .
.PP
The \fBinterp\fR command, described below, accepts qualified interpreter
names as arguments; the interpreter in which the command is being evaluated
can always be referred to as \fB{}\fR (the empty list or string). Note that
it is impossible to refer to a parent (ancestor) interpreter by name in a
child interpreter except through aliases. Also, there is no global name by
which one can refer to the first interpreter created in an application.
Both restrictions are motivated by safety concerns.
.SH "THE INTERP COMMAND"
.PP
The \fBinterp\fR command is used to create, delete, and manipulate
child interpreters, and to share or transfer
channels between interpreters.  It can have any of several forms, depending
on the \fIsubcommand\fR argument:
.TP
\fBinterp\fR \fBalias\fR \fIsrcPath\fR \fIsrcToken\fR
.
Returns a Tcl list whose elements are the \fItargetCmd\fR and
\fIarg\fRs associated with the alias represented by \fIsrcToken\fR
(this is the value returned when the alias was
created; it is possible that the name of the source command in the
child is different from \fIsrcToken\fR).
.TP
\fBinterp\fR \fBalias\fR \fIsrcPath\fR \fIsrcToken\fR \fB{}\fR
.
Deletes the alias for \fIsrcToken\fR in the child interpreter identified by
\fIsrcPath\fR.
\fIsrcToken\fR refers to the value returned when the alias
was created;  if the source command has been renamed, the renamed
command will be deleted.
.TP
\fBinterp\fR \fBalias\fR \fIsrcPath\fR \fIsrcCmd\fR \fItargetPath\fR \fItargetCmd \fR?\fIarg arg ...\fR?
.
This command creates an alias between one child and another (see the
\fBalias\fR child command below for creating aliases between a child
and its parent).  In this command, either of the child interpreters
may be anywhere in the hierarchy of interpreters under the interpreter
invoking the command.
\fISrcPath\fR and \fIsrcCmd\fR identify the source of the alias.
\fISrcPath\fR is a Tcl list whose elements select a particular
interpreter.  For example,
.QW "\fBa b\fR"
identifies an interpreter
.QW \fBb\fR ,
which is a child of interpreter
.QW \fBa\fR ,
which is a child of the invoking interpreter.  An empty list specifies
the interpreter invoking the command.  \fIsrcCmd\fR gives the name of
a new command, which will be created in the source interpreter.
\fITargetPath\fR and \fItargetCmd\fR specify a target interpreter
and command, and the \fIarg\fR arguments, if any, specify additional
arguments to \fItargetCmd\fR which are prepended to any arguments specified
in the invocation of \fIsrcCmd\fR.
\fITargetCmd\fR may be undefined at the time of this call, or it may

switches; it may be needed if \fIpath\fR is an unusual value such
as \fB\-safe\fR. If \fIresult\fR is present, it will be used as the
error message string; otherwise, a default error message string will be
used.
.TP
\fBinterp\fR \fBcreate \fR?\fB\-safe\fR? ?\fB\-\|\-\fR? ?\fIpath\fR?
.
Creates a child interpreter identified by \fIpath\fR and a new command,
called a \fIchild command\fR. The name of the child command is the last
component of \fIpath\fR. The new child interpreter and the child command
are created in the interpreter identified by the path obtained by removing
the last component from \fIpath\fR. For example, if \fIpath\fR is \fBa b
c\fR then a new child interpreter and child command named \fBc\fR are
created in the interpreter identified by the path \fBa b\fR.
The child command may be used to manipulate the new interpreter as
described below. If \fIpath\fR is omitted, Tcl creates a unique name of the
form \fBinterp\fIx\fR, where \fIx\fR is an integer, and uses it for the
interpreter and the child command. If the \fB\-safe\fR switch is specified
(or if the parent interpreter is a safe interpreter), the new child
interpreter will be created as a safe interpreter with limited
functionality; otherwise the child will include the full set of Tcl
built-in commands and variables. The \fB\-\|\-\fR switch can be used to
mark the end of switches;  it may be needed if \fIpath\fR is an unusual
value such as \fB\-safe\fR. The result of the command is the name of the
new interpreter. The name of a child interpreter must be unique among all
the children for its parent;  an error occurs if a child interpreter by the
given name already exists in this parent.
The initial recursion limit of the child interpreter is set to the
current recursion limit of its parent interpreter.
.TP
\fBinterp\fR \fBdebug \fIpath\fR ?\fB\-frame\fR ?\fIbool\fR??
.
Controls whether frame-level stack information is captured in the
child interpreter identified by \fIpath\fR.  If no arguments are
given, option and current setting are returned.  If \fB\-frame\fR
is given, the debug setting is set to the given boolean if provided
and the current setting is returned.
This only affects the output of \fBinfo frame\fR, in that exact
frame-level information for command invocation at the bytecode level
is only captured with this setting on.
.RS

attempts are silently ignored. This is needed to maintain the
consistency of the underlying interpreter's state.
.RE
.TP
\fBinterp\fR \fBdelete \fR?\fIpath ...\fR?
.
Deletes zero or more interpreters given by the optional \fIpath\fR
arguments, and for each interpreter, it also deletes its children. The
command also deletes the child command for each interpreter deleted.
For each \fIpath\fR argument, if no interpreter by that name
exists, the command raises an error.
.TP
\fBinterp\fR \fBeval\fR \fIpath arg \fR?\fIarg ...\fR?
.
This command concatenates all of the \fIarg\fR arguments in the same
fashion as the \fBconcat\fR command, then evaluates the resulting string as
a Tcl script in the child interpreter identified by \fIpath\fR. The result
of this evaluation (including all \fBreturn\fR options,
such as \fB\-errorinfo\fR and \fB\-errorcode\fR information, if an
error occurs) is returned to the invoking interpreter.
Note that the script will be executed in the current context stack frame of the
\fIpath\fR interpreter; this is so that the implementations (in a parent
interpreter) of aliases in a child interpreter can execute scripts in
the child that find out information about the child's current state
and stack frame.
.TP
\fBinterp exists \fIpath\fR
.
Returns \fB1\fR if a child interpreter by the specified \fIpath\fR
exists in this parent, \fB0\fR otherwise. If \fIpath\fR is omitted, the
invoking interpreter is used.
.TP
\fBinterp expose \fIpath\fR \fIhiddenName\fR ?\fIexposedCmdName\fR?
.
Makes the hidden command \fIhiddenName\fR exposed, eventually bringing
it back under a new \fIexposedCmdName\fR name (this name is currently
accepted only if it is a valid global name space name without any ::),

by \fIpath\fR.
If a hidden command with the targeted name already exists, this command
fails.
Currently both \fIexposedCmdName\fR and \fIhiddenCmdName\fR can
not contain namespace qualifiers, or an error is raised.
Commands to be hidden by \fBinterp hide\fR are looked up in the global
namespace even if the current namespace is not the global one. This
prevents children from fooling a parent interpreter into hiding the wrong
command, by making the current namespace be different from the global one.
Hidden commands are explained in more detail in \fBHIDDEN COMMANDS\fR, below.
.TP
\fBinterp\fR \fBhidden\fR \fIpath\fR
.
Returns a list of the names of all hidden commands in the interpreter
identified by \fIpath\fR.

between the interpreter identified by \fIsrcPath\fR and the interpreter
identified by \fIdestPath\fR. Both interpreters have the same permissions
on the IO channel.
Both interpreters must close it to close the underlying IO channel; IO
channels accessible in an interpreter are automatically closed when an
interpreter is destroyed.
.TP
\fBinterp\fR \fBchildren\fR ?\fIpath\fR?
.
Returns a Tcl list of the names of all the child interpreters associated
with the interpreter identified by \fIpath\fR. If \fIpath\fR is omitted,
the invoking interpreter is used.
.TP
\fBinterp\fR \fBslaves\fR ?\fIpath\fR?
.
Synonym for . \fBinterp\fR \fBchildren\fR ?\fIpath\fR?
.TP
\fBinterp\fR \fBtarget\fR \fIpath alias\fR
.
Returns a Tcl list describing the target interpreter for an alias. The
alias is specified with an interpreter path and source command name, just
as in \fBinterp alias\fR above. The name of the target interpreter is
returned as an interpreter path, relative to the invoking interpreter.
If the target interpreter for the alias is the invoking interpreter then an
empty list is returned. If the target interpreter for the alias is not the
invoking interpreter or one of its descendants then an error is generated.
The target command does not have to be defined at the time of this invocation.
.TP
\fBinterp\fR \fBtransfer\fR \fIsrcPath channelId destPath\fR
.
Causes the IO channel identified by \fIchannelId\fR to become available in
the interpreter identified by \fIdestPath\fR and unavailable in the
interpreter identified by \fIsrcPath\fR.
.SH "CHILD COMMAND"
.PP
For each child interpreter created with the \fBinterp\fR command, a
new Tcl command is created in the parent interpreter with the same
name as the new interpreter. This command may be used to invoke
various operations on the interpreter.  It has the following
general form:
.PP
.CS
\fIchild command \fR?\fIarg arg ...\fR?
.CE
.PP
\fIChild\fR is the name of the interpreter, and \fIcommand\fR
and the \fIarg\fRs determine the exact behavior of the command.
The valid forms of this command are:
.TP
\fIchild \fBaliases\fR
.
Returns a Tcl list whose elements are the tokens of all the
aliases in \fIchild\fR.  The tokens correspond to the values returned when
the aliases were created (which may not be the same
as the current names of the commands).
.TP
\fIchild \fBalias \fIsrcToken\fR
.
Returns a Tcl list whose elements are the \fItargetCmd\fR and
\fIarg\fRs associated with the alias represented by \fIsrcToken\fR
(this is the value returned when the alias was
created; it is possible that the actual source command in the
child is different from \fIsrcToken\fR).
.TP
\fIchild \fBalias \fIsrcToken \fB{}\fR
.
Deletes the alias for \fIsrcToken\fR in the child interpreter.
\fIsrcToken\fR refers to the value returned when the alias
was created;  if the source command has been renamed, the renamed
command will be deleted.
.TP
\fIchild \fBalias \fIsrcCmd targetCmd \fR?\fIarg ..\fR?
.
Creates an alias such that whenever \fIsrcCmd\fR is invoked
in \fIchild\fR, \fItargetCmd\fR is invoked in the parent.
The \fIarg\fR arguments will be passed to \fItargetCmd\fR as additional
arguments, prepended before any arguments passed in the invocation of
\fIsrcCmd\fR.
See \fBALIAS INVOCATION\fR below for details.
The command returns a token that uniquely identifies the command created
\fIsrcCmd\fR, even if the command is renamed afterwards. The token may but
does not have to be equal to \fIsrcCmd\fR.
.TP
\fIchild \fBbgerror\fR ?\fIcmdPrefix\fR?
.
This command either gets or sets the current background exception handler
for the \fIchild\fR interpreter. If \fIcmdPrefix\fR is
absent, the current background exception handler is returned, and if it is
present, it is a list of words (of minimum length one) that describes
what to set the interpreter's background exception handler to. See the
\fBBACKGROUND EXCEPTION HANDLING\fR section for more details.
.TP
\fIchild \fBeval \fIarg \fR?\fIarg ..\fR?
.
This command concatenates all of the \fIarg\fR arguments in
the same fashion as the \fBconcat\fR command, then evaluates
the resulting string as a Tcl script in \fIchild\fR.
The result of this evaluation (including all \fBreturn\fR options,
such as \fB\-errorinfo\fR and \fB\-errorcode\fR information, if an
error occurs) is returned to the invoking interpreter.
Note that the script will be executed in the current context stack frame
of \fIchild\fR; this is so that the implementations (in a parent
interpreter) of aliases in a child interpreter can execute scripts in
the child that find out information about the child's current state
and stack frame.
.TP
\fIchild \fBexpose \fIhiddenName \fR?\fIexposedCmdName\fR?
.
This command exposes the hidden command \fIhiddenName\fR, eventually bringing
it back under a new \fIexposedCmdName\fR name (this name is currently
accepted only if it is a valid global name space name without any ::),
in \fIchild\fR.
If an exposed command with the targeted name already exists, this command
fails.
For more details on hidden commands, see \fBHIDDEN COMMANDS\fR, below.
.TP
\fIchild \fBhide \fIexposedCmdName\fR ?\fIhiddenCmdName\fR?
.
This command hides the exposed command \fIexposedCmdName\fR, renaming it to
the hidden command \fIhiddenCmdName\fR, or keeping the same name if the
argument is not given, in the \fIchild\fR interpreter.
If a hidden command with the targeted name already exists, this command
fails.
Currently both \fIexposedCmdName\fR and \fIhiddenCmdName\fR can
not contain namespace qualifiers, or an error is raised.
Commands to be hidden are looked up in the global
namespace even if the current namespace is not the global one. This
prevents children from fooling a parent interpreter into hiding the wrong
command, by making the current namespace be different from the global one.
For more details on hidden commands, see \fBHIDDEN COMMANDS\fR, below.
.TP
\fIchild \fBhidden\fR
.
Returns a list of the names of all hidden commands in \fIchild\fR.
.TP
\fIchild \fBinvokehidden\fR ?\fI\-option ...\fR? \fIhiddenName \fR?\fIarg ..\fR?
.
This command invokes the hidden command \fIhiddenName\fR with the
supplied arguments, in \fIchild\fR. No substitutions or evaluations are
applied to the arguments. Three \fI\-option\fRs are supported, all
of which start with \fB\-\fR: \fB\-namespace\fR (which takes a single
argument afterwards, \fInsName\fR), \fB\-global\fR, and \fB\-\|\-\fR.
If the \fB\-namespace\fR flag is given, the hidden command is invoked in
the specified namespace in the child.
If the \fB\-global\fR flag is given, the command is invoked at the global
level in the child; otherwise it is invoked at the current call frame and
can access local variables in that or outer call frames.
The \fB\-\|\-\fR flag allows the \fIhiddenCmdName\fR argument to start with a
.QW \-
character, and is otherwise unnecessary.
If both the \fB\-namespace\fR and \fB\-global\fR flags are given, the
\fB\-namespace\fR flag is ignored.
Note that the hidden command will be executed (by default) in the
current context stack frame of \fIchild\fR.
For more details on hidden commands,
see \fBHIDDEN COMMANDS\fR, below.
.TP
\fIchild \fBissafe\fR
.
Returns  \fB1\fR if the child interpreter is safe, \fB0\fR otherwise.
.TP
\fIchild \fBlimit\fR \fIlimitType\fR ?\fI\-option\fR? ?\fIvalue\fR \fI...\fR?
.
Sets up, manipulates and queries the configuration of the resource
limit \fIlimitType\fR for the child interpreter.  If no \fI\-option\fR
is specified, return the current configuration of the limit.  If
\fI\-option\fR is the sole argument, return the value of that option.
Otherwise, a list of \fI\-option\fR/\fIvalue\fR argument pairs must
supplied. See \fBRESOURCE LIMITS\fR below for a more detailed explanation of
what limits and options are supported.
.TP
\fIchild \fBmarktrusted\fR
.
Marks the child interpreter as trusted. Can only be invoked by a
trusted interpreter. This command does not expose any hidden
commands in the child interpreter. The command has no effect if the child
is already trusted.
.TP
\fIchild\fR \fBrecursionlimit\fR ?\fInewlimit\fR?
.
Returns the maximum allowable nesting depth for the \fIchild\fR interpreter.
If \fInewlimit\fR is specified, the recursion limit in \fIchild\fR will be
set so that nesting of more than \fInewlimit\fR calls to \fBTcl_Eval()\fR
and related procedures in \fIchild\fR will return an error.
The \fInewlimit\fR value is also returned.
The \fInewlimit\fR value must be a positive integer between 1 and the
maximum value of a non-long integer on the platform.
.RS
.PP
The command sets the maximum size of the Tcl call stack only. It cannot
by itself prevent stack overflows on the C stack being used by the

fear of that script damaging the enclosing application or the rest
of your computing environment.  In order to make an interpreter
safe, certain commands and variables are removed from the interpreter.
For example, commands to create files on disk are removed, and the
\fBexec\fR command is removed, since it could be used to cause damage
through subprocesses.
Limited access to these facilities can be provided, by creating
aliases to the parent interpreter which check their arguments carefully
and provide restricted access to a safe subset of facilities.
For example, file creation might be allowed in a particular subdirectory
and subprocess invocation might be allowed for a carefully selected and
fixed set of programs.
.PP
A safe interpreter is created by specifying the \fB\-safe\fR switch
to the \fBinterp create\fR command.  Furthermore, any child created
by a safe interpreter will also be safe.
.PP
A safe interpreter is created with exactly the following set of
built-in commands:
.DS
.ta 1.2i 2.4i 3.6i
\fBafter\fR	\fBappend\fR	\fBapply\fR	\fBarray\fR

\fBSafe\-Tcl\fR and the \fBload\fR Tcl command.
.PP
A safe interpreter may not alter the recursion limit of any interpreter,
including itself.
.SH "ALIAS INVOCATION"
.PP
The alias mechanism has been carefully designed so that it can
be used safely in an untrusted script which is being executed in a
safe interpreter even if the target of the alias is not a safe
interpreter.  The most important thing in guaranteeing safety is to
ensure that information passed from the child to the parent is
never evaluated or substituted in the parent;  if this were to
occur, it would enable an evil script in the child to invoke
arbitrary functions in the parent, which would compromise security.
.PP
When the source for an alias is invoked in the child interpreter, the
usual Tcl substitutions are performed when parsing that command.
These substitutions are carried out in the source interpreter just
as they would be for any other command invoked in that interpreter.
The command procedure for the source command takes its arguments
and merges them with the \fItargetCmd\fR and \fIarg\fRs for the
alias to create a new array of arguments.  If the words
of \fIsrcCmd\fR were

\fItargetCmd\fR and \fIargs\fR were substituted when parsing the command
that created the alias, and \fIarg1 - argN\fR are substituted when
the alias's source command is parsed in the source interpreter.
.PP
When writing the \fItargetCmd\fRs for aliases in safe interpreters,
it is very important that the arguments to that command never be
evaluated or substituted, since this would provide an escape
mechanism whereby the child interpreter could execute arbitrary
code in the parent.  This in turn would compromise the security
of the system.
.SH "HIDDEN COMMANDS"
.PP
Safe interpreters greatly restrict the functionality available to Tcl
programs executing within them.
Allowing the untrusted Tcl program to have direct access to this
functionality is unsafe, because it can be used for a variety of

unavailable to Tcl scripts executing in the interpreter. However, such
hidden commands can be invoked by any trusted ancestor of the safe
interpreter, in the context of the safe interpreter, using \fBinterp
invoke\fR. Hidden commands and exposed commands reside in separate name
spaces. It is possible to define a hidden command and an exposed command by
the same name within one interpreter.
.PP
Hidden commands in a child interpreter can be invoked in the body of
procedures called in the parent during alias invocation. For example, an
alias for \fBsource\fR could be created in a child interpreter. When it is
invoked in the child interpreter, a procedure is called in the parent
interpreter to check that the operation is allowable (e.g. it asks to
source a file that the child interpreter is allowed to access). The
procedure then it invokes the hidden \fBsource\fR command in the child
interpreter to actually source in the contents of the file. Note that two
commands named \fBsource\fR exist in the child interpreter: the alias, and
the hidden command.
.PP
Because a parent interpreter may invoke a hidden command as part of
handling an alias invocation, great care must be taken to avoid evaluating
any arguments passed in through the alias invocation.
Otherwise, malicious child interpreters could cause a trusted parent
interpreter to execute dangerous commands on their behalf. See the section
on \fBALIAS INVOCATION\fR for a more complete discussion of this topic.
To help avoid this problem, no substitutions or evaluations are
applied to arguments of \fBinterp invokehidden\fR.
.PP
Safe interpreters are not allowed to invoke hidden commands in themselves
or in their descendants. This prevents them from gaining access to
hidden functionality in themselves or their descendants.
.PP
The set of hidden commands in an interpreter can be manipulated by a trusted
interpreter using \fBinterp expose\fR and \fBinterp hide\fR. The \fBinterp
expose\fR command moves a hidden command to the
set of exposed commands in the interpreter identified by \fIpath\fR,
potentially renaming the command in the process. If an exposed command by
the targeted name already exists, the operation fails. Similarly,
\fBinterp hide\fR moves an exposed command to the set of hidden commands in
that interpreter. Safe interpreters are not allowed to move commands
between the set of hidden and exposed commands, in either themselves or
their descendants.
.PP
Currently, the names of hidden commands cannot contain namespace
qualifiers, and you must first rename a command in a namespace to the
global namespace before you can hide it.
Commands to be hidden by \fBinterp hide\fR are looked up in the global
namespace even if the current namespace is not the global one. This
prevents children from fooling a parent interpreter into hiding the wrong
command, by making the current namespace be different from the global one.
.SH "RESOURCE LIMITS"
.PP
Every interpreter has two kinds of resource limits that may be imposed by any
parent interpreter upon its children. Command limits (of type \fBcommand\fR)
restrict the total number of Tcl commands that may be executed by an
interpreter (as can be inspected via the \fBinfo cmdcount\fR command), and
time limits (of type \fBtime\fR) place a limit by which execution within the
interpreter must complete. Note that time limits are expressed as
\fIabsolute\fR times (as in \fBclock seconds\fR) and not relative times (as in
\fBafter\fR) because they may be modified after creation.
.PP
When a limit is exceeded for an interpreter, first any handler callbacks
defined by parent interpreters are called. If those callbacks increase or
remove the limit, execution within the (previously) limited interpreter
continues. If the limit is still in force, an error is generated at that point
and normal processing of errors within the interpreter (by the \fBcatch\fR
command) is disabled, so the error propagates outwards (building a stack-trace
as it goes) to the point where the limited interpreter was invoked (e.g. by
\fBinterp eval\fR) where it becomes the responsibility of the calling code to
catch and handle.

.TP
\fB\-value\fR
.
This option specifies the number of commands that the interpreter may execute
before triggering the command limit. This option may be the empty string,
which indicates that a command limit is not set for the interpreter.
.PP
Where an interpreter with a resource limit set on it creates a child
interpreter, that child interpreter will have resource limits imposed on it
that are at least as restrictive as the limits on the creating parent
interpreter. If the parent interpreter of the limited parent wishes to relax
these conditions, it should hide the \fBinterp\fR command in the child and
then use aliases and the \fBinterp invokehidden\fR subcommand to provide such
access as it chooses to the \fBinterp\fR command to the limited parent as
necessary.
.SH "BACKGROUND EXCEPTION HANDLING"
.PP
When an exception happens in a situation where it cannot be reported directly up
the stack (e.g. when processing events in an \fBupdate\fR or \fBvwait\fR call)
the exception is instead reported through the background exception handling mechanism.
Every interpreter has a background exception handler registered; the default exception

    set x 0
    while {1} {
        puts "Counting up... [incr x]"
    }
}
.CE
.SH "SEE ALSO"
bgerror(n), load(n), safe(n), Tcl_CreateChild(3), Tcl_Eval(3), Tcl_BackgroundException(3)
.SH KEYWORDS
alias, parent interpreter, safe interpreter, child interpreter
'\"Local Variables:
'\"mode: nroff
'\"End:

\fBauto_mkindex foo *.tcl\fR
.CE
.PP
will read all the \fB.tcl\fR files in subdirectory \fBfoo\fR and
generate a new index file \fBfoo/tclIndex\fR.
.PP
\fBAuto_mkindex\fR parses the Tcl scripts by sourcing them into a
child interpreter and monitoring the proc and namespace commands that
are executed.  Extensions can use the (undocumented)
auto_mkindex_parser package to register other commands that can
contribute to the auto_load index. You will have to read through
auto.tcl to see how this works.
.PP
\fBAuto_mkindex_old\fR
(which has the same syntax as \fBauto_mkindex\fR)

'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2001 Kevin B. Kenny <kennykb@acm.org>.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lindex n 8.4 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

'\"
'\" Copyright (c) 2018 Peter Spjuth.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lpop n 8.7 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

'\"
'\" Copyright (c) 2003 Simon Geard.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lrepeat n 8.5 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

'\"
'\" Copyright (c) 2006 Donal K. Fellows.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lreverse n 8.5 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

'\"
'\" Copyright (c) 2001 Kevin B. Kenny <kennykb@acm.org>.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lset n 8.4 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-2000 Sun Microsystems, Inc.
'\" Copyright (c) 2005 Kevin B. Kenny <kennykb@acm.org>. All rights reserved
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH mathfunc n 8.5 Tcl "Tcl Mathematical Functions"
.so man.macros
.BS

are returned as an integer value.
.SH "SEE ALSO"
expr(n), fpclassify(n), mathop(n), namespace(n)
.SH "COPYRIGHT"
.nf
Copyright \(co 1993 The Regents of the University of California.
Copyright \(co 1994-2000 Sun Microsystems Incorporated.
Copyright \(co 2005-2006 Kevin B. Kenny <kennykb@acm.org>.
.fi
'\" Local Variables:
'\" mode: nroff
'\" fill-column: 78
'\" End:

'\"
'\" Copyright (c) 1992-1999 Karl Lehenbauer & Mark Diekhans
'\" Copyright (c) 2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH memory n 8.1 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
.SH NAME
memory \- Control Tcl memory debugging capabilities

'\"
'\" Copyright (c) 1998-2000 Scriptics Corporation.
'\" All rights reserved.
'\"
.TH pkg::create n 8.3 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME

script or binary files in \fIdir\fR.
The default pattern is \fB*.tcl\fR and \fB*.[info sharedlibextension]\fR.
.RS
.PP
\fBPkg_mkIndex\fR will create a file \fBpkgIndex.tcl\fR in \fIdir\fR
with package information about all the files given by the \fIpattern\fR
arguments.
It does this by loading each file into a child
interpreter and seeing what packages
and new commands appear (this is why it is essential to have
\fBpackage provide\fR commands or \fBTcl_PkgProvide\fR calls
in the files, as described above).
If you have a package split among scripts and binary files,
or if you have dependencies among files,
you may have to use the \fB\-load\fR option

The generated index will manage to delay loading the package until the
use of one of the commands provided by the package, instead of loading
it immediately upon \fBpackage require\fR.  This is not compatible with
the use of \fIauto_reset\fR, and therefore its use is discouraged.
.TP 15
\fB\-load \fIpkgPat\fR
The index process will pre-load any packages that exist in the
current interpreter and match \fIpkgPat\fR into the child interpreter used to
generate the index.  The pattern match uses string match rules, but without
making case distinctions.
See \fBCOMPLEX CASES\fR below.
.TP 15
\fB\-verbose\fR
Generate output during the indexing process.  Output is via
the \fBtclLog\fR procedure, which by default prints to stderr.

and \fB=]\fR is an equivalence class, standing for the sequences of
characters of all collating elements equivalent to that one, including
itself. (If there are no other equivalent collating elements, the
treatment is as if the enclosing delimiters were
.QW \fB[.\fR \&
and
.QW \fB.]\fR .)
For example, if \fBo\fR and \fB\(^o\fR are the members of an
equivalence class, then
.QW \fB[[=o=]]\fR ,
.QW \fB[[=\(^o=]]\fR ,
and
.QW \fB[o\(^o]\fR \&
are all synonymous. An equivalence class may not be an endpoint of a range.
.RS
.PP
(\fINote:\fR Tcl implements only the Unicode locale. It does not define any
equivalence classes. The examples above are just illustrations.)
.RE
.SH ESCAPES

'\"
'\" Copyright (c) 1995-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH "Safe Tcl" n 8.0 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
safe \- Creating and manipulating safe interpreters
.SH SYNOPSIS
\fB::safe::interpCreate\fR ?\fIchild\fR? ?\fIoptions...\fR?
.sp
\fB::safe::interpInit\fR \fIchild\fR ?\fIoptions...\fR?
.sp
\fB::safe::interpConfigure\fR \fIchild\fR ?\fIoptions...\fR?
.sp
\fB::safe::interpDelete\fR \fIchild\fR
.sp
\fB::safe::interpAddToAccessPath\fR \fIchild\fR \fIdirectory\fR
.sp
\fB::safe::interpFindInAccessPath\fR \fIchild\fR \fIdirectory\fR
.sp
\fB::safe::setSyncMode\fR ?\fInewValue\fR?
.sp
\fB::safe::setLogCmd\fR ?\fIcmd arg...\fR?
.SS OPTIONS
.PP
?\fB\-accessPath\fR \fIpathList\fR?

hosting application.
It prevents integrity and privacy attacks. Untrusted Tcl
scripts are prevented from corrupting the state of the hosting
application or computer. Untrusted scripts are also prevented from
disclosing information stored on the hosting computer or in the
hosting application to any party.
.PP
Safe Tcl allows a parent interpreter to create safe, restricted
interpreters that contain a set of predefined aliases for the \fBsource\fR,
\fBload\fR, \fBfile\fR, \fBencoding\fR, and \fBexit\fR commands and
are able to use the auto-loading and package mechanisms.
.PP
No knowledge of the file system structure is leaked to the
safe interpreter, because it has access only to a virtualized path
containing tokens. When the safe interpreter requests to source a file, it
uses the token in the virtual path as part of the file name to source; the
parent interpreter transparently
translates the token into a real directory name and executes the
requested operation (see the section \fBSECURITY\fR below for details).
Different levels of security can be selected by using the optional flags
of the commands described below.
.PP
All commands provided in the parent interpreter by Safe Tcl reside in
the \fBsafe\fR namespace.
.SH COMMANDS
The following commands are provided in the parent interpreter:
.TP
\fB::safe::interpCreate\fR ?\fIchild\fR? ?\fIoptions...\fR?
Creates a safe interpreter, installs the aliases described in the section
\fBALIASES\fR and initializes the auto-loading and package mechanism as
specified by the supplied \fIoptions\fR.
See the \fBOPTIONS\fR section below for a description of the
optional arguments.
If the \fIchild\fR argument is omitted, a name will be generated.
\fB::safe::interpCreate\fR always returns the interpreter name.
.sp
The interpreter name \fIchild\fR may include namespace separators,
but may not have leading or trailing namespace separators, or excess
colon characters in namespace separators.  The interpreter name is
qualified relative to the global namespace ::, not the namespace in which
the \fB::safe::interpCreate\fR command is evaluated.
.TP
\fB::safe::interpInit\fR \fIchild\fR ?\fIoptions...\fR?
This command is similar to \fBinterpCreate\fR except it that does not
create the safe interpreter. \fIchild\fR must have been created by some
other means, like \fBinterp create\fR \fB\-safe\fR.  The interpreter
name \fIchild\fR may include namespace separators, subject to the same
restrictions as for \fBinterpCreate\fR.
.TP
\fB::safe::interpConfigure\fR \fIchild\fR ?\fIoptions...\fR?
If no \fIoptions\fR are given, returns the settings for all options for the
named safe interpreter as a list of options and their current values
for that \fIchild\fR.
If a single additional argument is provided,
it will return a list of 2 elements \fIname\fR and \fIvalue\fR where
\fIname\fR is the full name of that option and \fIvalue\fR the current value
for that option and the \fIchild\fR.
If more than two additional arguments are provided, it will reconfigure the
safe interpreter and change each and only the provided options.
See the section on \fBOPTIONS\fR below for options description.
Example of use:
.RS
.PP
.CS
# Create new interp with the same configuration as "$i0":
set i1 [safe::interpCreate {*}[safe::interpConfigure $i0]]

# Get the current deleteHook
set dh [safe::interpConfigure $i0  \-del]

# Change (only) the statics loading ok attribute of an
# interp and its deleteHook (leaving the rest unchanged):
safe::interpConfigure $i0  \-delete {foo bar} \-statics 0
.CE
.RE
.TP
\fB::safe::interpDelete\fR \fIchild\fR
Deletes the safe interpreter and cleans up the corresponding
parent interpreter data structures.
If a \fIdeleteHook\fR script was specified for this interpreter it is
evaluated before the interpreter is deleted, with the name of the
interpreter as an additional argument.
.TP
\fB::safe::interpFindInAccessPath\fR \fIchild\fR \fIdirectory\fR
This command finds and returns the token for the real directory
\fIdirectory\fR in the safe interpreter's current virtual access path.
It generates an error if the directory is not found.
Example of use:
.RS
.PP
.CS
$child eval [list set tk_library \e
      [::safe::interpFindInAccessPath $name $tk_library]]
.CE
.RE
.TP
\fB::safe::interpAddToAccessPath\fR \fIchild\fR \fIdirectory\fR
This command adds \fIdirectory\fR to the virtual path maintained for the
safe interpreter in the parent, and returns the token that can be used in
the safe interpreter to obtain access to files in that directory.
If the directory is already in the virtual path, it only returns the token
without adding the directory to the virtual path again.
Example of use:
.RS
.PP
.CS
$child eval [list set tk_library \e
      [::safe::interpAddToAccessPath $name $tk_library]]
.CE
.RE
.TP
\fB::safe::setSyncMode\fR ?\fInewValue\fR?
This command is used to get or set the "Sync Mode" of the Safe Base.
When an argument is supplied, the command returns an error if the argument
is not a boolean value, or if any Safe Base interpreters exist.  Typically
the value will be set as part of initialization - boolean true for
"Sync Mode" on (the default), false for "Sync Mode" off.  With "Sync Mode"
on, the Safe Base keeps each child interpreter's ::auto_path synchronized
with its access path.  See the section \fBSYNC MODE\fR below for details.
.TP
\fB::safe::setLogCmd\fR ?\fIcmd arg...\fR?
This command installs a script that will be called when interesting
life cycle events occur for a safe interpreter.
When called with no arguments, it returns the currently installed script.
When called with one argument, an empty string, the currently installed

.PP
Below is the output of a sample session in which a safe interpreter
attempted to source a file not found in its virtual access path.
Note that the safe interpreter only received an error message saying that
the file was not found:
.PP
.CS
NOTICE for child interp10 : Created
NOTICE for child interp10 : Setting accessPath=(/foo/bar) staticsok=1 nestedok=0 deletehook=()
NOTICE for child interp10 : auto_path in interp10 has been set to {$p(:0:)}
ERROR for child interp10 : /foo/bar/init.tcl: no such file or directory
.CE
.RE
.SS OPTIONS
The following options are common to
\fB::safe::interpCreate\fR, \fB::safe::interpInit\fR,
and \fB::safe::interpConfigure\fR.
Any option name can be abbreviated to its minimal
non-ambiguous name.
Option names are not case sensitive.
.TP
\fB\-accessPath\fR \fIdirectoryList\fR
This option sets the list of directories from which the safe interpreter
can \fBsource\fR and \fBload\fR files.
If this option is not specified, or if it is given as the
empty list, the safe interpreter will use the same directories as its
parent for auto-loading.
See the section \fBSECURITY\fR below for more detail about virtual paths,
tokens and access control.
.TP
\fB\-autoPath\fR \fIdirectoryList\fR
This option sets the list of directories in the safe interpreter's
::auto_path.  The option is undefined if the Safe Base has "Sync Mode" on
- in that case the safe interpreter's ::auto_path is managed by the Safe

\fB\-nestedLoadOk\fR
This option is a convenience shortcut for \fB\-nested true\fR and
thus specifies the safe interpreter will be allowed
to load packages into its own sub-interpreters.
.TP
\fB\-deleteHook\fR \fIscript\fR
When this option is given a non-empty \fIscript\fR, it will be
evaluated in the parent with the name of
the safe interpreter as an additional argument
just before actually deleting the safe interpreter.
Giving an empty value removes any currently installed deletion hook
script for that safe interpreter.
The default value (\fB{}\fR) is not to have any deletion call back.
.SH ALIASES
The following aliases are provided in a safe interpreter:

code and it can request that packages be loaded.
.PP
Because some of these commands access the local file system, there is a
potential for information leakage about its directory structure.
To prevent this, commands that take file names as arguments in a safe
interpreter use tokens instead of the real directory names.
These tokens are translated to the real directory name while a request to,
e.g., source a file is mediated by the parent interpreter.
This virtual path system is maintained in the parent interpreter for each safe
interpreter created by \fB::safe::interpCreate\fR or initialized by
\fB::safe::interpInit\fR and
the path maps tokens accessible in the safe interpreter into real path
names on the local file system thus preventing safe interpreters
from gaining knowledge about the
structure of the file system of the host on which the interpreter is
executing.
The only valid file names arguments
for the \fBsource\fR and \fBload\fR aliases provided to the child
are path in the form of
\fB[file join \fItoken filename\fB]\fR (i.e. when using the
native file path formats: \fItoken\fB/\fIfilename\fR
on Unix and \fItoken\fB\e\fIfilename\fR on Windows),
where \fItoken\fR is representing one of the directories
of the \fIaccessPath\fR list and \fIfilename\fR is
one file in that directory (no sub directories access are allowed).

must end up with the extension
.PQ \fB.tcl\fR
or be called
.PQ \fBtclIndex\fR .
.PP
Each element of the initial access path
list will be assigned a token that will be set in
the child \fBauto_path\fR and the first element of that list will be set as
the \fBtcl_library\fR for that child.
.PP
If the access path argument is not given to \fB::safe::interpCreate\fR or
\fB::safe::interpInit\fR or is the empty list,
the default behavior is to let the child access the same packages
as the parent has access to (Or to be more precise:
only packages written in Tcl (which by definition cannot be dangerous
as they run in the child interpreter) and C extensions that
provides a _SafeInit entry point). For that purpose, the parent's
\fBauto_path\fR will be used to construct the child access path.
In order that the child successfully loads the Tcl library files
(which includes the auto-loading mechanism itself) the \fBtcl_library\fR will be
added or moved to the first position if necessary, in the
child access path, so the child
\fBtcl_library\fR will be the same as the parent's (its real
path will still be invisible to the child though).
In order that auto-loading works the same for the child and
the parent in this by default case, the first-level
sub directories of each directory in the parent \fBauto_path\fR will
also be added (if not already included) to the child access path.
You can always specify a more
restrictive path for which sub directories will never be searched by
explicitly specifying your directory list with the \fB\-accessPath\fR flag
instead of relying on this default mechanism.
.PP
When the \fIaccessPath\fR is changed after the first creation or
initialization (i.e. through \fBinterpConfigure -accessPath \fR\fIlist\fR),

 safe::setSyncMode 0
.CE
.RE
.PP
Use \fB::safe::interpCreate\fR or \fB::safe::interpInit\fR to create an
interpreter with the properties that you require.  The simplest way is not
to specify \fB\-accessPath\fR or \fB\-autoPath\fR, which means the safe
interpreter will use the same paths as the parent interpreter.  However,
if \fB\-accessPath\fR is specified, then \fB\-autoPath\fR must also be
specified, or else it will be set to {}.
.PP
The value of \fB\-autoPath\fR will be that required to access tclIndex
and pkgIndex.txt files according to the same rules as an unsafe
interpreter (see pkg_mkIndex(n) and library(n)).
.PP
With "Sync Mode" on, the option \fB\-autoPath\fR is undefined, and
the Safe Base sets the child's ::auto_path to a tokenized form of the
access path. In addition to the directories present if "Safe Mode" is off,
the ::auto_path includes the numerous subdirectories and module paths
that belong to the access path.
.SH SYNC MODE
Before Tcl version 8.6.x, the Safe Base kept each safe interpreter's
::auto_path synchronized with a tokenized form of its access path.
Limitations of Tcl 8.4 and earlier made this feature necessary.  This

Base interpreters.
.PP
In either mode, the most convenient way to initialize a safe interpreter is
to call \fB::safe::interpCreate\fR or \fB::safe::interpInit\fR without the
\fB\-accessPath\fR or \fB\-autoPath\fR options (or with the \fB\-accessPath\fR
option set to the
empty list), which will give the safe interpreter the same access as the
parent interpreter to packages, modules, and autoloader files.  With
"Sync Mode" off, the Safe Base will set the value of \fB\-autoPath\fR to the
parent's ::auto_path, and will set the child's ::auto_path to a tokenized form
of the parent's ::auto_path.
.PP
With "Sync Mode" off, if a value is specified for \fB\-autoPath\fR, even the empty
list, in a call to \fB::safe::interpCreate\fR, \fB::safe::interpInit\fR, or
\fB::safe::interpConfigure\fR, it will be tokenized and used as the safe
interpreter's ::auto_path.  Any directories that do not also belong to the
access path cannot be tokenized and will be silently ignored.  However, the
value of \fB\-autoPath\fR will remain as specified, and will be used to
re-tokenize the child's ::auto_path if \fB::safe::interpConfigure\fR is called
to change the value of \fB\-accessPath\fR.
.PP
With "Sync Mode" off, if the access path is reset to the values in the
parent interpreter by calling \fB::safe::interpConfigure\fR with arguments
\fB\-accessPath\fR {}, then the ::auto_path will also be reset unless the argument
\fB\-autoPath\fR is supplied to specify a different value.
.PP
With "Sync Mode" off, if a non-empty value of \fB\-accessPath\fR is supplied, the
safe interpreter's ::auto_path will be set to {} (by
\fB::safe::interpCreate\fR, \fB::safe::interpInit\fR) or left unchanged
(by \fB::safe::interpConfigure\fR).  If the same command specifies a new
value for \fB\-autoPath\fR, it will be applied after the \fB\-accessPath\fR argument has
been processed.

Examples of use with "Sync Mode" off: any of these commands will set the
::auto_path to a tokenized form of its value in the parent interpreter:
.RS
.PP
.CS
 safe::interpCreate foo
 safe::interpCreate foo -accessPath {}
 safe::interpInit bar
 safe::interpInit bar -accessPath {}

     /usr/local/TclHome/lib/tcl8.6/http1.0
     /usr/local/TclHome/lib/tcl8.6/opt0.4
     /usr/local/TclHome/lib/tcl8.6/msgs
     /usr/local/TclHome/lib/tcl8.6/encoding
     /usr/local/TclHome/lib
 }

 # The child's ::auto_path must be given a suitable value:

 safe::interpConfigure foo -autoPath {
     /usr/local/TclHome/lib/tcl8.6
     /usr/local/TclHome/lib
 }

 # The two commands can be combined:

\fBsafe::interpAddToAccessPath\fR does not change the safe interpreter's
::auto_path, and so any necessary change must be made by the script:
.RS
.PP
.CS
 safe::interpAddToAccessPath foo /usr/local/TclHome/lib/extras/Img1.4.11

 lassign [safe::interpConfigure foo -autoPath] DUM childAutoPath
 lappend childAutoPath /usr/local/TclHome/lib/extras/Img1.4.11
 safe::interpConfigure foo -autoPath $childAutoPath
.CE
.RE
.TP
.SH "SEE ALSO"
interp(n), library(n), load(n), package(n), pkg_mkIndex(n), source(n),
tm(n), unknown(n)
.SH KEYWORDS
alias, auto\-loading, auto_mkindex, load, parent interpreter, safe
interpreter, child interpreter, source
'\" Local Variables:
'\" mode: nroff
'\" End:

'\"
'\" Copyright (c) 1996 Sun Microsystems, Inc.
'\" Copyright (c) 1998-1999 Scriptics Corporation.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH socket n 8.6 Tcl "Tcl Built-In Commands"
.so man.macros
.BS

which will be safely substituted by the Tcl interpreter into
.QW ^Z .
.PP
A leading BOM (Byte order mark) contained in the file is ignored for unicode encodings (utf-8, utf-16, ucs-2).
.PP
The \fB\-encoding\fR option is used to specify the encoding of
the data stored in \fIfileName\fR.  When the \fB\-encoding\fR option
is omitted, the utf-8 encoding is assumed.
.SH EXAMPLE
.PP
Run the script in the file \fBfoo.tcl\fR and then the script in the
file \fBbar.tcl\fR:
.PP
.CS
\fBsource\fR foo.tcl

to \fBoutputChannel\fR.  This command also restores the original
shell environment, as described by the global \fBenv\fR
array. Returns an empty string.
.RE
.TP
\fBrunAllTests\fR
.
This is a main command meant to run an entire suite of tests,
spanning multiple files and/or directories, as governed by
the configurable options of \fBtcltest\fR.  See \fBRUNNING ALL TESTS\fR
below for a complete description of the many variations possible
with \fBrunAllTests\fR.
.SS "CONFIGURATION COMMANDS"
.TP
\fBconfigure\fR

and sorted.  Then each file will be evaluated in turn.  If
\fBconfigure \-singleproc\fR is true, then each file will
be \fBsource\fRd in the caller's context.  If it is false,
then a copy of \fBinterpreter\fR will be \fBexec\fR'd to
evaluate each file.  The multi-process operation is useful
when testing can cause errors so severe that a process
terminates.  Although such an error may terminate a child
process evaluating one file, the main process can continue
with the rest of the test suite.  In multi-process operation,
the configuration of \fBtcltest\fR in the main process is
passed to the child processes as command line arguments,
with the exception of \fBconfigure \-outfile\fR.  The
\fBrunAllTests\fR command in the
main process collects all output from the child processes
and collates their results into one main report.  Any
reports of individual test failures, or messages requested
by a \fBconfigure \-verbose\fR setting are passed directly
on to \fBoutputChannel\fR by the main process.
.PP
After evaluating all selected test files, a summary of the
results is printed to \fBoutputChannel\fR.  The summary
includes the total number of \fBtest\fRs evaluated, broken
down into those skipped, those passed, and those failed.
The summary also notes the number of files evaluated, and the names
of any files with failing tests or errors.  A list of

all files to be evaluated in a common interpreter.  A simple way to
achieve this is to have your tests define all their commands and variables
in a namespace that is deleted when the test file evaluation is complete.
A good namespace to use is a child namespace \fBtest\fR of the namespace
of the module you are testing.
.PP
A test file should also be able to be evaluated directly as a script,
not depending on being called by a main \fBrunAllTests\fR.  This
means that each test file should process command line arguments to give
the tester all the configuration control that \fBtcltest\fR provides.
.PP
After all \fBtest\fRs in a test file, the command \fBcleanupTests\fR
should be called.
.IP [7]
Here is a sketch of a sample test file illustrating those points:
.RS
.PP
.CS
package require tcltest 2.5
eval \fB::tcltest::configure\fR $argv
package require example
namespace eval ::example::test {
    namespace import ::tcltest::*
    \fBtestConstraint\fR X [expr {...}]
    variable SETUP {#common setup code}
    variable CLEANUP {#common cleanup code}

The next level of organization is a full test suite, made up of several
test files.  One script is used to control the entire suite.  The
basic function of this script is to call \fBrunAllTests\fR after
doing any necessary setup.  This script is usually named \fBall.tcl\fR
because that is the default name used by \fBrunAllTests\fR when combining
multiple test suites into one testing run.
.IP [8]
Here is a sketch of a sample test suite main script:
.RS
.PP
.CS
package require Tcl 8.6
package require tcltest 2.5
package require example
\fB::tcltest::configure\fR -testdir \e
        [file dirname [file normalize [info script]]]
eval \fB::tcltest::configure\fR $argv
\fB::tcltest::runAllTests\fR
.CE
.RE

static void bracket(struct vars *, struct state *, struct state *);
static void cbracket(struct vars *, struct state *, struct state *);
static void brackpart(struct vars *, struct state *, struct state *);
static const chr *scanplain(struct vars *);
static void onechr(struct vars *, pchr, struct state *, struct state *);
static void dovec(struct vars *, struct cvec *, struct state *, struct state *);
static void wordchrs(struct vars *);
static struct subre *sub_re(struct vars *, int, int, struct state *, struct state *);
static void freesubre(struct vars *, struct subre *);
static void freesrnode(struct vars *, struct subre *);
static int numst(struct subre *, int);
static void markst(struct subre *);
static void cleanst(struct vars *);
static long nfatree(struct vars *, struct subre *, FILE *);
static long nfanode(struct vars *, struct subre *, FILE *);

    struct subre *branches;	/* top level */
    struct subre *branch;	/* current branch */
    struct subre *t;		/* temporary */
    int firstbranch;		/* is this the first branch? */

    assert(stopper == ')' || stopper == EOS);

    branches = sub_re(v, '|', LONGER, init, final);
    NOERRN();
    branch = branches;
    firstbranch = 1;
    do {	/* a branch */
	if (!firstbranch) {
	    /*
	     * Need a place to hang the branch.
	     */

	    branch->right = sub_re(v, '|', LONGER, init, final);
	    NOERRN();
	    branch = branch->right;
	}
	firstbranch = 0;
	left = newstate(v->nfa);
	right = newstate(v->nfa);
	NOERRN();

{
    struct state *lp;		/* left end of current construct */
    int seencontent;		/* is there anything in this branch yet? */
    struct subre *t;

    lp = left;
    seencontent = 0;
    t = sub_re(v, '=', 0, left, right);	/* op '=' is tentative */
    NOERRN();
    while (!SEE('|') && !SEE(stopper) && !SEE(EOS)) {
	if (seencontent) {	/* implicit concat operator */
	    lp = newstate(v->nfa);
	    NOERRN();
	    moveins(v->nfa, right, lp);
	}

	NOERR();
	atom = parse(v, ')', PLAIN, s, s2);
	assert(SEE(')') || ISERR());
	NEXT();
	NOERR();
	if (cap) {
	    v->subs[subno] = atom;
	    t = sub_re(v, '(', atom->flags|CAP, lp, rp);
	    NOERR();
	    t->subno = subno;
	    t->left = atom;
	    atom = t;
	}

	/*
	 * Postpone everything else pending possible {0}.
	 */

	break;
    case BACKREF:		/* the Feature From The Black Lagoon */
	INSIST(type != LACON, REG_ESUBREG);
	INSIST(v->nextvalue < v->nsubs, REG_ESUBREG);
	INSIST(v->subs[v->nextvalue] != NULL, REG_ESUBREG);
	NOERR();
	assert(v->nextvalue > 0);
	atom = sub_re(v, 'b', BACKR, lp, rp);
	NOERR();
	subno = v->nextvalue;
	atom->subno = subno;
	EMPTYARC(lp, rp);	/* temporarily, so there's something */
	NEXT();
	break;
    }

     */

    /*
     * Now we'll need a subre for the contents even if they're boring.
     */

    if (atom == NULL) {
	atom = sub_re(v, '=', 0, lp, rp);
	NOERR();
    }

    /*
     * Prepare a general-purpose state skeleton.
     *
     * In the no-backrefs case, we want this:

    EMPTYARC(lp, s);
    NOERR();

    /*
     * Break remaining subRE into x{...} and what follows.
     */

    t = sub_re(v, '.', COMBINE(qprefer, atom->flags), lp, rp);
    NOERR();
    t->left = atom;
    atomp = &t->left;

    /*
     * Here we should recurse... but we must postpone that to the end.
     */

    /*
     * Split top into prefix and remaining.
     */

    assert(top->op == '=' && top->left == NULL && top->right == NULL);
    top->left = sub_re(v, '=', top->flags, top->begin, lp);
    NOERR();
    top->op = '.';
    top->right = t;

    /*
     * If it's a backref, now is the time to replicate the subNFA.
     */

	 * we don't really care where its submatches are.
	 */

	dupnfa(v->nfa, atom->begin, atom->end, s, atom->begin);
	assert(m >= 1 && m != DUPINF && n >= 1);
	repeat(v, s, atom->begin, m-1, (n == DUPINF) ? n : n-1);
	f = COMBINE(qprefer, atom->flags);
	t = sub_re(v, '.', f, s, atom->end);	/* prefix and atom */
	NOERR();
	t->left = sub_re(v, '=', PREF(f), s, atom->begin);
	NOERR();
	t->right = atom;
	*atomp = t;
	/* rest of branch can be strung starting from atom->end */
	s2 = atom->end;
    } else {
	/* general case: need an iteration node */
	s2 = newstate(v->nfa);
	NOERR();
	moveouts(v->nfa, atom->end, s2);
	NOERR();
	dupnfa(v->nfa, atom->begin, atom->end, s, s2);
	repeat(v, s, s2, m, n);
	f = COMBINE(qprefer, atom->flags);
	t = sub_re(v, '*', f, s, s2);
	NOERR();
	t->min = (short) m;
	t->max = (short) n;
	t->left = atom;
	*atomp = t;
	/* rest of branch is to be strung from iteration's end state */
    }

    /*
     * And finally, look after that postponed recursion.
     */

    t = top->right;
    if (!(SEE('|') || SEE(stopper) || SEE(EOS))) {
	t->right = parsebranch(v, stopper, type, s2, rp, 1);
    } else {
	EMPTYARC(s2, rp);
	t->right = sub_re(v, '=', 0, s2, rp);
    }
    NOERR();
    assert(SEE('|') || SEE(stopper) || SEE(EOS));
    t->flags |= COMBINE(t->flags, t->right->flags);
    top->flags |= COMBINE(top->flags, t->flags);
}


    assert((v->savenow != NULL && SEE(']')) || ISERR());
    NEXT();
    NOERR();
    v->wordchrs = left;
}

/*
 - sub_re - allocate a subre
 ^ static struct subre *sub_re(struct vars *, int, int, struct state *,
 ^	struct state *);
 */
static struct subre *
sub_re(
    struct vars *v,
    int op,
    int flags,
    struct state *begin,
    struct state *end)
{
    struct subre *ret = v->treefree;

    struct arcp *incarea;	/* inchain storage */
    struct cnfa *cnfa;
    struct colormap *cm;
    chr *lastpost;		/* location of last cache-flushed success */
    chr *lastnopr;		/* location of last cache-flushed NOPROGRESS */
    struct sset *search;	/* replacement-search-pointer memory */
    int cptsmalloced;		/* were the areas individually malloced? */
    char *mallocarea;		/* self, or malloced area, or NULL */
};

#define	WORK	1		/* number of work bitvectors needed */

/*
 * Setup for non-malloc allocation for small cases.
 */

# tcl.decls --
#
#	This file contains the declarations for all supported public
#	functions that are exported by the Tcl library via the stubs table.
#	This file is used to generate the tclDecls.h, tclPlatDecls.h
#	and tclStubInit.c files.
#
# Copyright © 1998-1999 Scriptics Corporation.
# Copyright © 2001, 2002 Kevin B. Kenny.  All rights reserved.
# Copyright © 2007 Daniel A. Steffen <das@users.sourceforge.net>
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

library tcl

# Define the tcl interface with several sub interfaces:

    int Tcl_ConvertElement(const char *src, char *dst, int flags)
}
declare 85 {
    int Tcl_ConvertCountedElement(const char *src, int length, char *dst,
	    int flags)
}
declare 86 {
    int Tcl_CreateAlias(Tcl_Interp *childInterp, const char *childCmd,
	    Tcl_Interp *target, const char *targetCmd, int argc,
	    const char *const *argv)
}
declare 87 {
    int Tcl_CreateAliasObj(Tcl_Interp *childInterp, const char *childCmd,
	    Tcl_Interp *target, const char *targetCmd, int objc,
	    Tcl_Obj *const objv[])
}
declare 88 {
    Tcl_Channel Tcl_CreateChannel(const Tcl_ChannelType *typePtr,
	    const char *chanName, ClientData instanceData, int mask)
}

declare 96 {
    Tcl_Command Tcl_CreateObjCommand(Tcl_Interp *interp,
	    const char *cmdName,
	    Tcl_ObjCmdProc *proc, ClientData clientData,
	    Tcl_CmdDeleteProc *deleteProc)
}
declare 97 {
    Tcl_Interp *Tcl_CreateChild(Tcl_Interp *interp, const char *name,
	    int isSafe)
}
declare 98 {
    Tcl_TimerToken Tcl_CreateTimerHandler(int milliseconds,
	    Tcl_TimerProc *proc, ClientData clientData)
}
declare 99 {

declare 146 {
    int Tcl_Flush(Tcl_Channel chan)
}
declare 147 {deprecated {see TIP #559. Use Tcl_ResetResult}} {
    void Tcl_FreeResult(Tcl_Interp *interp)
}
declare 148 {
    int Tcl_GetAlias(Tcl_Interp *interp, const char *childCmd,
	    Tcl_Interp **targetInterpPtr, const char **targetCmdPtr,
	    int *argcPtr, const char ***argvPtr)
}
declare 149 {
    int Tcl_GetAliasObj(Tcl_Interp *interp, const char *childCmd,
	    Tcl_Interp **targetInterpPtr, const char **targetCmdPtr,
	    int *objcPtr, Tcl_Obj ***objv)
}
declare 150 {
    ClientData Tcl_GetAssocData(Tcl_Interp *interp, const char *name,
	    Tcl_InterpDeleteProc **procPtr)
}

declare 161 {
    int Tcl_GetErrno(void)
}
declare 162 {
    const char *Tcl_GetHostName(void)
}
declare 163 {
    int Tcl_GetInterpPath(Tcl_Interp *interp, Tcl_Interp *childInterp)
}
declare 164 {
    Tcl_Interp *Tcl_GetParent(Tcl_Interp *interp)
}
declare 165 {
    const char *Tcl_GetNameOfExecutable(void)
}
declare 166 {
    Tcl_Obj *Tcl_GetObjResult(Tcl_Interp *interp)
}

declare 170 {
    int Tcl_GetsObj(Tcl_Channel chan, Tcl_Obj *objPtr)
}
declare 171 {
    int Tcl_GetServiceMode(void)
}
declare 172 {
    Tcl_Interp *Tcl_GetChild(Tcl_Interp *interp, const char *name)
}
declare 173 {
    Tcl_Channel Tcl_GetStdChannel(int type)
}
declare 174 {
    const char *Tcl_GetStringResult(Tcl_Interp *interp)
}

 * unix/configure.ac	(2 LOC Major, 2 LOC minor, 1 LOC patch)
 * win/configure.ac	(as above)
 * win/tcl.m4		(not patchlevel)
 * README		(sections 0 and 2, with and without separator)
 * macosx/Tcl-Common.xcconfig (not patchlevel) 1 LOC
 * win/README		(not patchlevel) (sections 0 and 2)
 * unix/tcl.spec	(1 LOC patch)

 */

#define TCL_MAJOR_VERSION   8
#define TCL_MINOR_VERSION   7
#define TCL_RELEASE_LEVEL   TCL_ALPHA_RELEASE
#define TCL_RELEASE_SERIAL  4

 *
 * Note on converting between Tcl_WideInt and strings. This implementation (in
 * tclObj.c) depends on the function
 * sprintf(...,"%" TCL_LL_MODIFIER "d",...).
 */

#if !defined(TCL_WIDE_INT_TYPE)&&!defined(TCL_WIDE_INT_IS_LONG)
#   if defined(_WIN32) && (!defined(__USE_MINGW_ANSI_STDIO) || !__USE_MINGW_ANSI_STDIO)
#      define TCL_WIDE_INT_TYPE __int64
#      define TCL_LL_MODIFIER	"I64"
#      if defined(_WIN64)
#         define TCL_Z_MODIFIER	"I"
#      endif
#   elif defined(__GNUC__)
#      define TCL_Z_MODIFIER	"z"

 *	that condition.
 */

#define TCL_DONT_USE_BRACES	1
#define TCL_DONT_QUOTE_HASH	8

/*
 * Flags that may be passed to Tcl_GetIndexFromObj.
 * TCL_EXACT disallows abbreviated strings.
 * TCL_INDEX_TEMP_TABLE disallows caching of lookups. A possible use case is
 *      a table that will not live long enough to make it worthwhile.
 */

#define TCL_EXACT		1
#define TCL_INDEX_TEMP_TABLE	2

/*
 *----------------------------------------------------------------------------
 * Flag values passed to Tcl_RecordAndEval, Tcl_EvalObj, Tcl_EvalObjv.
 * WARNING: these bit choices must not conflict with the bit choices for
 * evalFlag bits in tclInt.h!
 *

     * Use do/while0 idiom for optimum correctness without compiler warnings.
     * http://c2.com/cgi/wiki?TrivialDoWhileLoop
     */
#   undef Tcl_DecrRefCount
#   define Tcl_DecrRefCount(objPtr) \
	do { \
	    Tcl_Obj *_objPtr = (objPtr); \
	    if (_objPtr->refCount-- <= 1) { \
		TclFreeObj(_objPtr); \
	    } \
	} while(0)
#   undef Tcl_IsShared
#   define Tcl_IsShared(objPtr) \
	((objPtr)->refCount > 1)
#endif

 * Windows and Unix use an alternative allocator when building with threads
 * that has significantly reduced lock contention.
 */

#include "tclInt.h"
#if !TCL_THREADS || !defined(USE_THREAD_ALLOC)

#if defined(USE_TCLALLOC) && USE_TCLALLOC

/*
 * We should really make use of AC_CHECK_TYPE(caddr_t) here, but it can wait
 * until Tcl uses config.h properly.
 */

#if defined(_MSC_VER) || defined(__MSVCRT__) || defined(__BORLANDC__)

				 * stack. */
};

/*
 * Source instruction type recognized by the assembler.
 */

typedef enum {
    ASSEM_1BYTE,		/* Fixed arity, 1-byte instruction */
    ASSEM_BEGIN_CATCH,		/* Begin catch: one 4-byte jump offset to be
				 * converted to appropriate exception
				 * ranges */
    ASSEM_BOOL,			/* One Boolean operand */
    ASSEM_BOOL_LVT4,		/* One Boolean, one 4-byte LVT ref. */
    ASSEM_CLOCK_READ,		/* 1-byte unsigned-integer case number, in the
				 * range 0-3 */
    ASSEM_CONCAT1,		/* 1-byte unsigned-integer operand count, must
				 * be strictly positive, consumes N, produces
				 * 1 */
    ASSEM_DICT_GET,		/* 'dict get' and related - consumes N+1
				 * operands, produces 1, N > 0 */


    ASSEM_DICT_SET,		/* specifies key count and LVT index, consumes
				 * N+1 operands, produces 1, N > 0 */
    ASSEM_DICT_UNSET,		/* specifies key count and LVT index, consumes
				 * N operands, produces 1, N > 0 */
    ASSEM_END_CATCH,		/* End catch. No args. Exception range popped
				 * from stack and stack pointer restored. */
    ASSEM_EVAL,			/* 'eval' - evaluate a constant script (by

    ASSEM_PUSH,			/* one literal operand */
    ASSEM_REGEXP,		/* One Boolean operand, but weird mapping to
				 * call flags */
    ASSEM_REVERSE,		/* REVERSE: 4-byte operand count, consumes N,
				 * produces N */
    ASSEM_SINT1,		/* One 1-byte signed-integer operand
				 * (INCR_STK_IMM) */
    ASSEM_SINT4_LVT4,		/* Signed 4-byte integer operand followed by
				 * LVT entry.  Fixed arity */
    ASSEM_DICT_GET_DEF		/* 'dict getwithdefault' - consumes N+2
				 * operands, produces 1, N > 0 */
} TalInstType;

/*
 * Description of an instruction recognized by the assembler.
 */

typedef struct TalInstDesc {

     * On failure, report error line.
     */

    if (codePtr == NULL) {
	Tcl_AddErrorInfo(interp, "\n    (\"");
	Tcl_AppendObjToErrorInfo(interp, objv[0]);
	Tcl_AddErrorInfo(interp, "\" body, line ");
	TclNewIntObj(backtrace, Tcl_GetErrorLine(interp));
	Tcl_AppendObjToErrorInfo(interp, backtrace);
	Tcl_AddErrorInfo(interp, ")");
	return TCL_ERROR;
    }

    /*
     * Use NRE to evaluate the bytecode from the trampoline.

				/* Tcl interpreter */
    Tcl_Parse* parsePtr = assemEnvPtr->parsePtr;
				/* Parse of the line of code */
    Tcl_Token* tokenPtr;	/* Current token within the line of code */
    Tcl_Obj* instNameObj;	/* Name of the instruction */
    int tblIdx;			/* Index in TalInstructionTable of the
				 * instruction */
    TalInstType instType;	/* Type of the instruction */
    Tcl_Obj* operand1Obj = NULL;
				/* First operand to the instruction */
    const char* operand1;	/* String rep of the operand */
    int operand1Len;		/* String length of the operand */
    int opnd;			/* Integer representation of an operand */
    int litIndex;		/* Literal pool index of a constant */
    int localVar;		/* LVT index of a local variable */

    AssemblyEnv* assemEnvPtr,	/* Assembly environment */
    Tcl_Token** tokenPtrPtr,	/* INPUT/OUTPUT: Pointer to the token holding
				 * the operand */
    Tcl_Obj** operandObjPtr)	/* OUTPUT: Tcl object holding the operand text
				 * with \-substitutions done. */
{
    Tcl_Interp* interp = (Tcl_Interp*) assemEnvPtr->envPtr->iPtr;
    Tcl_Obj* operandObj;

    TclNewObj(operandObj);
    if (!TclWordKnownAtCompileTime(*tokenPtrPtr, operandObj)) {
	Tcl_DecrRefCount(operandObj);
	if (assemEnvPtr->flags & TCL_EVAL_DIRECT) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "assembly code may not contain substitutions", -1));
	    Tcl_SetErrorCode(interp, "TCL", "ASSEM", "NOSUBST", NULL);
	}

    CompileEnv* envPtr = assemEnvPtr->envPtr;
				/* Compilation environment */
    Tcl_Interp* interp = (Tcl_Interp*) envPtr->iPtr;
				/* Tcl interpreter */
    Tcl_Obj* lineNo;		/* Line number in the source */

    Tcl_AddErrorInfo(interp, "\n    in assembly code between lines ");
    TclNewIntObj(lineNo, bbPtr->startLine);
    Tcl_IncrRefCount(lineNo);
    Tcl_AppendObjToErrorInfo(interp, lineNo);
    Tcl_AddErrorInfo(interp, " and ");
    if (bbPtr->successor1 != NULL) {
	TclSetIntObj(lineNo, bbPtr->successor1->startLine);
	Tcl_AppendObjToErrorInfo(interp, lineNo);
    } else {

    }

    if (commandTypeInit == 0) {
        TclRegisterCommandTypeName(TclObjInterpProc, "proc");
        TclRegisterCommandTypeName(TclEnsembleImplementationCmd, "ensemble");
        TclRegisterCommandTypeName(TclAliasObjCmd, "alias");
        TclRegisterCommandTypeName(TclLocalAliasObjCmd, "alias");
        TclRegisterCommandTypeName(TclChildObjCmd, "interp");
        TclRegisterCommandTypeName(TclInvokeImportedCmd, "import");
        TclRegisterCommandTypeName(TclOOPublicObjectCmd, "object");
        TclRegisterCommandTypeName(TclOOPrivateObjectCmd, "privateObject");
        TclRegisterCommandTypeName(TclOOMyClassObjCmd, "privateClass");
        TclRegisterCommandTypeName(TclNRInterpCoroutine, "coroutine");
    }

#ifdef TCL_NO_DEPRECATED
    iPtr->result = &tclEmptyString;
#else
    iPtr->result = iPtr->resultSpace;
#endif
    iPtr->freeProc = NULL;
    iPtr->errorLine = 0;
    TclNewObj(iPtr->objResultPtr);
    Tcl_IncrRefCount(iPtr->objResultPtr);
    iPtr->handle = TclHandleCreate(iPtr);
    iPtr->globalNsPtr = NULL;
    iPtr->hiddenCmdTablePtr = NULL;
    iPtr->interpInfo = NULL;

    TCL_CT_ASSERT(sizeof(iPtr->extra) <= sizeof(Tcl_HashTable));

    iPtr->flags = 0;
    iPtr->tracePtr = NULL;
    iPtr->tracesForbiddingInline = 0;
    iPtr->activeCmdTracePtr = NULL;
    iPtr->activeInterpTracePtr = NULL;
    iPtr->assocData = NULL;
    iPtr->execEnvPtr = NULL;	/* Set after namespaces initialized. */

    TclNewObj(iPtr->emptyObjPtr); /* Another empty object. */
    Tcl_IncrRefCount(iPtr->emptyObjPtr);
#ifndef TCL_NO_DEPRECATED
    iPtr->resultSpace[0] = 0;
#endif
    iPtr->threadId = Tcl_GetCurrentThread();

    /* TIP #378 */

    iPtr->chanMsg = NULL;

    /*
     * TIP #285, Script cancellation support.
     */

    TclNewObj(iPtr->asyncCancelMsg);

    cancelInfo = (CancelInfo *)ckalloc(sizeof(CancelInfo));
    cancelInfo->interp = interp;

    iPtr->asyncCancel = Tcl_AsyncCreate(CancelEvalProc, cancelInfo);
    cancelInfo->async = iPtr->asyncCancel;
    cancelInfo->result = NULL;

    if (oldRefPtr != NULL) {
	cmdPtr->importRefPtr = oldRefPtr;
	while (oldRefPtr != NULL) {
	    Command *refCmdPtr = oldRefPtr->importedCmdPtr;

	    dataPtr = (ImportedCmdData*)refCmdPtr->objClientData;
	    cmdPtr->refCount++;
	    TclCleanupCommandMacro(dataPtr->realCmdPtr);
	    dataPtr->realCmdPtr = cmdPtr;
	    oldRefPtr = oldRefPtr->nextPtr;
	}
    }

    /*
     * We just created a command, so in its namespace and all of its parent

    if ((newName == NULL) || (*newName == '\0')) {
	Tcl_DeleteCommandFromToken(interp, cmd);
	return TCL_OK;
    }

    cmdNsPtr = cmdPtr->nsPtr;
    TclNewObj(oldFullName);
    Tcl_IncrRefCount(oldFullName);
    Tcl_GetCommandFullName(interp, cmd, oldFullName);

    /*
     * Make sure that the destination command does not already exist. The
     * rename operation is like creating a command, so we should automatically
     * create the containing namespaces just like Tcl_CreateCommand would.

    char *name;

    /*
     * Add the full name of the containing namespace, followed by the "::"
     * separator, and the command name.
     */

    if ((cmdPtr != NULL) && TclRoutineHasName(cmdPtr)) {
	if (cmdPtr->nsPtr != NULL) {
	    Tcl_AppendToObj(objPtr, cmdPtr->nsPtr->fullName, -1);
	    if (cmdPtr->nsPtr != iPtr->globalNsPtr) {
		Tcl_AppendToObj(objPtr, "::", 2);
	    }
	}
	if (cmdPtr->hPtr != NULL) {

     * invoking the deletion callback because there are cases where the
     * deletion callback needs to invoke the command (e.g. object systems such
     * as OTcl). However, this means that the callback could try to delete or
     * rename the command. The deleted flag allows us to detect these cases
     * and skip nested deletes.
     */

    if (cmdPtr->flags & CMD_DYING) {
	/*
	 * Another deletion is already in progress. Remove the hash table
	 * entry now, but don't invoke a callback or free the command
	 * structure. Take care to only remove the hash entry if it has not
	 * already been removed; otherwise if we manage to hit this function
	 * three times, everything goes up in smoke. [Bug 1220058]
	 */

     * We must delete this command, even though both traces and delete procs
     * may try to avoid this (renaming the command etc). Also traces and
     * delete procs may try to delete the command themselves. This flag
     * declares that a delete is in progress and that recursive deletes should
     * be ignored.
     */

    cmdPtr->flags |= CMD_DYING;

    /*
     * Call trace functions for the command being deleted. Then delete its
     * traces.
     */

    cmdPtr->nsPtr->refCount++;

	    }
	    tracePtr = nextPtr;
	}
	cmdPtr->tracePtr = NULL;
    }

    /*
     * The list of commands exported from the namespace might have changed.
     * However, we do not need to recompute this just yet; next time we need
     * the info will be soon enough.
     */

    TclInvalidateNsCmdLookup(cmdPtr->nsPtr);
    TclNsDecrRefCount(cmdPtr->nsPtr);

    Tcl_InterpState state = NULL;

    if (cmdPtr->flags & CMD_TRACE_ACTIVE) {
	/*
	 * While a rename trace is active, we will not process any more rename
	 * traces; while a delete trace is active we will never reach here -
	 * because Tcl_DeleteCommandFromToken checks for the condition
	 * (cmdPtr->flags & CMD_DYING) and returns immediately when a
	 * command deletion is in progress. For all other traces, delete
	 * traces will not be invoked but a call to TraceCommandProc will
	 * ensure that tracePtr->clientData is freed whenever the command
	 * "oldName" is deleted.
	 */

	if (cmdPtr->flags & TCL_TRACE_RENAME) {

	     * just in case the caller passed flags that might cause behaviour
	     * unrelated to script cancellation.
	     */

	    TclSetCancelFlags(iPtr, cancelInfo->flags | CANCELED);

	    /*
	     * Now, we must set the script cancellation flags on all the child
	     * interpreters belonging to this one.
	     */

	    TclSetChildCancelFlags((Tcl_Interp *) iPtr,
		    cancelInfo->flags | CANCELED, 0);

	    /*

    /*
     * Return the result of the call.
     */

    if (funcResult.type == TCL_INT) {
	TclNewIntObj(valuePtr, funcResult.intValue);
    } else if (funcResult.type == TCL_WIDE_INT) {
	TclNewIntObj(valuePtr, funcResult.wideValue);
    } else {
	return CheckDoubleResult(interp, funcResult.doubleValue);
    }
    Tcl_SetObjResult(interp, valuePtr);
    return TCL_OK;
}


    }

    state = Tcl_SaveInterpState(interp, TCL_OK);
    Tcl_IncrRefCount(script);
    if (TCL_OK == Tcl_EvalObjEx(interp, script, 0)) {
	result = Tcl_DuplicateObj(Tcl_GetObjResult(interp));
    } else {
	TclNewObj(result);
    }
    Tcl_DecrRefCount(script);
    Tcl_RestoreInterpState(interp, state);

    return result;
}
#endif /* !defined(TCL_NO_DEPRECATED) */


/*
 *----------------------------------------------------------------------
 *
 * Tcl_Canceled --
 *
 *	Check if the script in progress has been canceled, i.e.,
 *	Tcl_CancelEval was called for this interpreter or any of its parent
 *	interpreters.
 *
 * Results:
 *	The return value is TCL_OK if the script evaluation has not been
 *	canceled, TCL_ERROR otherwise.
 *
 *	If "flags" contains TCL_LEAVE_ERR_MSG, an error message is returned in

    int objc = PTR2INT(data[0]);
    Tcl_Obj *commandPtr = (Tcl_Obj *)data[1];
    Command *cmdPtr = (Command *)data[2];
    Tcl_Obj **objv = (Tcl_Obj **)data[3];
    int length;
    const char *command = TclGetStringFromObj(commandPtr, &length);

    if (!(cmdPtr->flags & CMD_DYING)) {
	if (cmdPtr->flags & CMD_HAS_EXEC_TRACES) {
	    traceCode = TclCheckExecutionTraces(interp, command, length,
		    cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv);
	}
	if (iPtr->tracePtr != NULL && traceCode == TCL_OK) {
	    traceCode = TclCheckInterpTraces(interp, command, length,
		    cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv);

    const char *outerScript)	/* continuation line data. This is set only in
				 * TclSubstTokens(), to properly handle
				 * [...]-nested commands. The 'outerScript'
				 * refers to the most-outer script containing
				 * the embedded command, which is refered to
				 * by 'script'. The 'clNextOuter' refers to
				 * the current entry in the table of
				 * continuation lines in this "main script",
				 * and the character offsets are relative to
				 * the 'outerScript' as well.
				 *
				 * If outerScript == script, then this call is
				 * for the outer-most script/command. See
				 * Tcl_EvalEx() and TclEvalObjEx() for places
				 * generating arguments for which this is

	 * This also preserves any associations between list elements and
	 * location information for such elements.
	 */

	/*
	 * Shimmer protection! Always pass an unshared obj. The caller could
	 * incr the refCount of objPtr AFTER calling us! To be completely safe
	 * we always make a copy. The callback takes care of the refCounts for
	 * both listPtr and objPtr.
	 *
	 * TODO: Create a test to demo this need, or eliminate it.
	 * FIXME OPT: preserve just the internal rep?
	 */

	Tcl_IncrRefCount(objPtr);

	Tcl_Panic("TclObjInvoke: called without TCL_INVOKE_HIDDEN");
    }
    return Tcl_NRCallObjProc(interp, TclNRInvoke, NULL, objc, objv);
}

int
TclNRInvoke(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    Interp *iPtr = (Interp *) interp;
    Tcl_HashTable *hTblPtr;	/* Table of hidden commands. */
    const char *cmdName;	/* Name of the command from objv[0]. */

 *	None.
 *
 *----------------------------------------------------------------------
 */

static int
ExprCeilFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter list. */
{
    int code;
    double d;

	Tcl_SetObjResult(interp, Tcl_NewDoubleObj(ceil(d)));
    }
    return TCL_OK;
}

static int
ExprFloorFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter list. */
{
    int code;
    double d;

	Tcl_SetObjResult(interp, Tcl_NewDoubleObj(floor(d)));
    }
    return TCL_OK;
}

static int
ExprIsqrtFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter list. */
{
    ClientData ptr;
    int type;
    double d;

    Tcl_SetErrorCode(interp, "ARITH", "DOMAIN",
	    "domain error: argument not in valid range", NULL);
    return TCL_ERROR;
}

static int
ExprSqrtFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter list. */
{
    int code;
    double d;

    }
    errno = 0;
    return CheckDoubleResult(interp, func(d1, d2));
}

static int
ExprAbsFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Parameter vector. */
{
    ClientData ptr;
    int type;

#endif
    }
    return TCL_OK;
}

static int
ExprBoolFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    int value;

    if (objc != 2) {
	MathFuncWrongNumArgs(interp, 2, objc, objv);
	return TCL_ERROR;
    }
    if (Tcl_GetBooleanFromObj(interp, objv[1], &value) != TCL_OK) {
	return TCL_ERROR;
    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(value));
    return TCL_OK;
}

static int
ExprDoubleFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    double dResult;

    }
    Tcl_SetObjResult(interp, Tcl_NewDoubleObj(dResult));
    return TCL_OK;
}

static int
ExprIntFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    double d;
    int type;

    Tcl_GetDoubleFromObj(interp, objv[1], &d);
    return TCL_ERROR;
}

static int
ExprWideFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    Tcl_WideInt wResult;

    if (ExprIntFunc(NULL, interp, objc, objv) != TCL_OK) {
	return TCL_ERROR;
    }
    TclGetWideBitsFromObj(NULL, Tcl_GetObjResult(interp), &wResult);
    Tcl_SetObjResult(interp, Tcl_NewWideIntObj(wResult));
    return TCL_OK;
}

/*
 * Common implmentation of max() and min().
 */
static int
ExprMaxMinFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv,	/* Actual parameter vector. */
    int op)			/* Comparison direction */
{
    Tcl_Obj *res;

    Tcl_SetObjResult(interp, res);
    return TCL_OK;
}

static int
ExprMaxFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    return ExprMaxMinFunc(NULL, interp, objc, objv, MP_GT);
}

static int
ExprMinFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    return ExprMaxMinFunc(NULL, interp, objc, objv, MP_LT);
}

static int
ExprRandFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Actual parameter vector. */
{
    Interp *iPtr = (Interp *) interp;
    double dResult;

    TclNewDoubleObj(oResult, dResult);
    Tcl_SetObjResult(interp, oResult);
    return TCL_OK;
}

static int
ExprRoundFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Parameter vector. */
{
    double d;
    ClientData ptr;

    Tcl_GetDoubleFromObj(interp, objv[1], &d);
    return TCL_ERROR;
}

static int
ExprSrandFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Parameter vector. */
{
    Interp *iPtr = (Interp *) interp;
    Tcl_WideInt w = 0;		/* Initialized to avoid compiler warning. */

#error "unknown or unexpected TCL_FPCLASSIFY_MODE"
#endif /* TCL_FPCLASSIFY_MODE */
#endif /* !fpclassify */
}

static int
ExprIsFiniteFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
ExprIsInfinityFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
ExprIsNaNFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
ExprIsNormalFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
ExprIsSubnormalFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
ExprIsUnorderedFunc(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    ClientData ptr;

    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
FloatClassifyObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    double d;
    Tcl_Obj *objPtr;

	tail--;
	if (*tail == ':' && tail[-1] == ':') {
	    name = tail+1;
	    break;
	}
    }
    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
	    "%s arguments for math function \"%s\"",
	    (found < expected ? "not enough" : "too many"), name));
    Tcl_SetErrorCode(interp, "TCL", "WRONGARGS", NULL);
}

#ifdef USE_DTRACE
/*
 *----------------------------------------------------------------------
 *

 *	The 'tcl-probe' DTrace probe is triggered (if it is enabled).
 *
 *----------------------------------------------------------------------
 */

static int
DTraceObjCmd(
    TCL_UNUSED(void *),
    TCL_UNUSED(Tcl_Interp *),
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    if (TCL_DTRACE_TCL_PROBE_ENABLED()) {
	char *a[10];
	int i = 0;

 *	updated so that its data[1] field contains the tailcall list.
 *
 *----------------------------------------------------------------------
 */

int
TclNRTailcallObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    Interp *iPtr = (Interp *) interp;

    if (objc < 1) {

    TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr,
            clientData, NULL, NULL);
    return TCL_OK;
}

int
TclNRYieldToObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;
    Tcl_Obj *listPtr, *nsObjPtr;
    Tcl_Namespace *nsPtr = TclGetCurrentNamespace(interp);

	return result;
    }

    NRE_ASSERT(COR_IS_SUSPENDED(corPtr));
    SAVE_CONTEXT(corPtr->running);
    RESTORE_CONTEXT(corPtr->caller);

    if (cmdPtr->flags & CMD_DYING) {
	/*
	 * The command was deleted while it was running: wind down the
	 * execEnv, this will do the complete cleanup. RewindCoroutine will
	 * restore both the caller's context and interp state.
	 */

	return RewindCoroutine(corPtr, result);

 *      Implementation of [::tcl::unsupported::corotype] command.
 *
 *----------------------------------------------------------------------
 */

static int
CoroTypeObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    Command *cmdPtr;
    CoroutineData *corPtr;

        return NULL;
    }
    return (CoroutineData *)cmdPtr->objClientData;
}

static int
TclNRCoroInjectObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr;
    ExecEnv *savedEEPtr = iPtr->execEnvPtr;

    iPtr->execEnvPtr = savedEEPtr;

    return TCL_OK;
}

static int
TclNRCoroProbeObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr;
    ExecEnv *savedEEPtr = iPtr->execEnvPtr;
    int numLevels, unused;

            Tcl_ListObjAppendElement(NULL, listPtr,
                    Tcl_NewStringObj("yieldto", -1));
        } else {
            /*
             * I don't think this is reachable...
             */

            Tcl_ListObjAppendElement(NULL, listPtr, Tcl_NewWideIntObj(nargs));
        }
        Tcl_ListObjAppendElement(NULL, listPtr, Tcl_GetObjResult(interp));
    }

    /*
     * Call the user's script; we're in the right place.
     */

 *      Implementation of [::tcl::unsupported::inject] command.
 *
 *----------------------------------------------------------------------
 */

static int
NRInjectObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr;
    ExecEnv *savedEEPtr = iPtr->execEnvPtr;

 *      description of what this does.
 *
 *----------------------------------------------------------------------
 */

int
TclNRCoroutineObjCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Command *cmdPtr;
    CoroutineData *corPtr;
    const char *procName, *simpleName;


/*
 * This is used in the [info] ensemble
 */

int
TclInfoCoroutineCmd(
    TCL_UNUSED(void *),
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;

    if (objc != 1) {
	Tcl_WrongNumArgs(interp, 1, objv, NULL);
	return TCL_ERROR;
    }

    if (corPtr && !(corPtr->cmdPtr->flags & CMD_DYING)) {
	Tcl_Obj *namePtr;

	TclNewObj(namePtr);
	Tcl_GetCommandFullName(interp, (Tcl_Command) corPtr->cmdPtr, namePtr);
	Tcl_SetObjResult(interp, namePtr);
    }
    return TCL_OK;

    unsigned int bad;		/* Index of the character that is a nonbyte.
				 * If all characters are bytes, bad = used,
				 * though then we should never read it. */
    unsigned int used;		/* The number of bytes used in the byte
				 * array. */
    unsigned int allocated;	/* The amount of space actually allocated
				 * minus 1 byte. */
    unsigned char bytes[TCLFLEXARRAY];	/* The array of bytes. The actual size of this
				 * field depends on the 'allocated' field
				 * above. */
} ByteArray;

#define BYTEARRAY_SIZE(len) \
		(offsetof(ByteArray, bytes) + (len))
#define GET_BYTEARRAY(irPtr) ((ByteArray *) (irPtr)->twoPtrValue.ptr1)

    }

    /*
     * Prepare the result object by preallocating the caclulated number of
     * bytes and filling with nulls.
     */

    TclNewObj(resultPtr);
    buffer = Tcl_SetByteArrayLength(resultPtr, length);
    memset(buffer, 0, length);

    /*
     * Pack the data into the result object. Note that we can skip the error
     * checking during this pass, since we have already parsed the string
     * once.

	str = format;
	flags = 0;
	if (!GetFormatSpec(&format, &cmd, &count, &flags)) {
	    goto done;
	}
	switch (cmd) {
	case 'a':
	case 'A':
	case 'C': {
	    unsigned char *src;

	    if (arg >= objc) {
		DeleteScanNumberCache(numberCachePtr);
		goto badIndex;
	    }
	    if (count == BINARY_ALL) {

		}
	    }

	    src = buffer + offset;
	    size = count;

	    /*
	     * Apply C string semantics or trim trailing
	     * nulls and spaces, if necessary.
	     */

	    if (cmd == 'C') {
		for (i = 0; i < size; i++) {
		    if (src[i] == '\0') {
			size = i;
			break;
		    }
		}
	    } else if (cmd == 'A') {
		while (size > 0) {
		    if (src[size - 1] != '\0' && src[size - 1] != ' ') {
			break;
		    }
		    size--;
		}
	    }

		    count = 1;
		}
		if (count > (length - offset) * 8) {
		    goto done;
		}
	    }
	    src = buffer + offset;
	    TclNewObj(valuePtr);
	    Tcl_SetObjLength(valuePtr, count);
	    dest = TclGetString(valuePtr);

	    if (cmd == 'b') {
		for (i = 0; i < count; i++) {
		    if (i % 8) {
			value >>= 1;

		    count = 1;
		}
		if (count > (length - offset)*2) {
		    goto done;
		}
	    }
	    src = buffer + offset;
	    TclNewObj(valuePtr);
	    Tcl_SetObjLength(valuePtr, count);
	    dest = TclGetString(valuePtr);

	    if (cmd == 'h') {
		for (i = 0; i < count; i++) {
		    if (i % 2) {
			value >>= 4;

	    } else {
		if (count == BINARY_ALL) {
		    count = (length - offset) / size;
		}
		if ((length - offset) < (count * size)) {
		    goto done;
		}
		TclNewObj(valuePtr);
		src = buffer + offset;
		for (i = 0; i < count; i++) {
		    elementPtr = ScanNumber(src, cmd, flags, &numberCachePtr);
		    src += size;
		    Tcl_ListObjAppendElement(NULL, valuePtr, elementPtr);
		}
		offset += count * size;

	    int isNew;

	    hPtr = Tcl_CreateHashEntry(tablePtr, INT2PTR(value), &isNew);
	    if (!isNew) {
		return (Tcl_Obj *)Tcl_GetHashValue(hPtr);
	    }
	    if (tablePtr->numEntries <= BINARY_SCAN_MAX_CACHE) {
		Tcl_Obj *objPtr;

		TclNewIntObj(objPtr, value);
		Tcl_IncrRefCount(objPtr);
		Tcl_SetHashValue(hPtr, objPtr);
		return objPtr;
	    }

	    /*
	     * We've overflowed the cache! Someone's parsing a LOT of varied

	    break;
	}
    }
    if (wrapcharlen == 0) {
	maxlen = 0;
    }

    TclNewObj(resultObj);
    data = Tcl_GetByteArrayFromObj(objv[objc - 1], &count);
    if (count > 0) {
	unsigned char *cursor = NULL;

	size = (((count * 4) / 3) + 3) & ~3;	/* ensure 4 byte chunks */
	if (maxlen > 0 && size > maxlen) {
	    int adjusted = size + (wrapcharlen * (size / maxlen));

    }

    /*
     * Allocate the buffer. This is a little bit too long, but is "good
     * enough".
     */

    TclNewObj(resultObj);
    offset = 0;
    data = Tcl_GetByteArrayFromObj(objv[objc - 1], &count);
    rawLength = (lineLength - 1) * 3 / 4;
    start = cursor = Tcl_SetByteArrayLength(resultObj,
	    (lineLength + wrapcharlen) *
	    ((count + (rawLength - 1)) / rawLength));
    n = bits = 0;

	curTagPtr = NULL;
    }
    allocHead = NULL;

    Tcl_MutexUnlock(ckallocMutexPtr);
#endif

#if defined(USE_TCLALLOC) && USE_TCLALLOC
    TclFinalizeAllocSubsystem();
#endif
}

/*
 * Local Variables:
 * mode: c

/*
 * tclClock.c --
 *
 *	Contains the time and date related commands. This code is derived from
 *	the time and date facilities of TclX, by Mark Diekhans and Karl
 *	Lehenbauer.
 *
 * Copyright (c) 1991-1995 Karl Lehenbauer & Mark Diekhans.
 * Copyright (c) 1995 Sun Microsystems, Inc.
 * Copyright (c) 2004 by Kevin B. Kenny. All rights reserved.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

	{"milliseconds", ClockMillisecondsObjCmd, TclCompileClockReadingCmd, NULL, INT2PTR(2), 0},
	{"scan",         NULL,                    TclCompileBasicMin1ArgCmd, NULL, NULL      , 0},
	{"seconds",      ClockSecondsObjCmd,      TclCompileClockReadingCmd, NULL, INT2PTR(3), 0},
	{NULL,           NULL,                    NULL,                      NULL, NULL,       0}
    };

    /*
     * Safe interps get [::clock] as alias to a parent, so do not need their
     * own copies of the support routines.
     */

    if (Tcl_IsSafe(interp)) {
	return;
    }

static inline void	ForeachCleanup(Tcl_Interp *interp,
			    struct ForeachState *statePtr);
static int		GetStatBuf(Tcl_Interp *interp, Tcl_Obj *pathPtr,
			    Tcl_FSStatProc *statProc, Tcl_StatBuf *statPtr);
static const char *	GetTypeFromMode(int mode);
static int		StoreStatData(Tcl_Interp *interp, Tcl_Obj *varName,
			    Tcl_StatBuf *statPtr);
static int	EachloopCmd(Tcl_Interp *interp, int collect,
			    int objc, Tcl_Obj *const objv[]);
static Tcl_NRPostProc	CatchObjCmdCallback;
static Tcl_NRPostProc	ExprCallback;
static Tcl_NRPostProc	ForSetupCallback;
static Tcl_NRPostProc	ForCondCallback;
static Tcl_NRPostProc	ForNextCallback;
static Tcl_NRPostProc	ForPostNextCallback;

    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    return EachloopCmd(interp, TCL_EACH_COLLECT, objc, objv);
}

static int
EachloopCmd(
    Tcl_Interp *interp,		/* Our context for variables and script
				 * evaluation. */
    int collect,		/* Select collecting or accumulating mode
				 * (TCL_EACH_*) */
    int objc,			/* The arguments being passed in... */
    Tcl_Obj *const objv[])

	Tcl_WrongNumArgs(interp, 1, objv, "varName ?increment?");
	return TCL_ERROR;
    }

    if (objc == 3) {
	incrPtr = objv[2];
    } else {
	TclNewIntObj(incrPtr, 1);
    }
    Tcl_IncrRefCount(incrPtr);
    newValuePtr = TclIncrObjVar2(interp, objv[1], NULL,
	    incrPtr, TCL_LEAVE_ERR_MSG);
    Tcl_DecrRefCount(incrPtr);

    if (newValuePtr == NULL) {

	 * special characters. This lets us avoid scans of any hash tables.
	 */

	entryPtr = Tcl_FindHashEntry(&nsPtr->cmdTable, simplePattern);
	if (entryPtr != NULL) {
	    if (specificNsInPattern) {
		cmd = (Tcl_Command)Tcl_GetHashValue(entryPtr);
		TclNewObj(elemObjPtr);
		Tcl_GetCommandFullName(interp, cmd, elemObjPtr);
	    } else {
		cmdName = (const char *)Tcl_GetHashKey(&nsPtr->cmdTable, entryPtr);
		elemObjPtr = Tcl_NewStringObj(cmdName, -1);
	    }
	    Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr);
	    Tcl_SetObjResult(interp, listPtr);

	entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
	while (entryPtr != NULL) {
	    cmdName = (const char *)Tcl_GetHashKey(&nsPtr->cmdTable, entryPtr);
	    if ((simplePattern == NULL)
		    || Tcl_StringMatch(cmdName, simplePattern)) {
		if (specificNsInPattern) {
		    cmd = (Tcl_Command)Tcl_GetHashValue(entryPtr);
		    TclNewObj(elemObjPtr);
		    Tcl_GetCommandFullName(interp, cmd, elemObjPtr);
		} else {
		    elemObjPtr = Tcl_NewStringObj(cmdName, -1);
		}
		Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr);
	    }
	    entryPtr = Tcl_NextHashEntry(&search);

		valueObjPtr = Tcl_ObjSetVar2(interp, objv[3], NULL,
			localPtr->defValuePtr, TCL_LEAVE_ERR_MSG);
		if (valueObjPtr == NULL) {
		    return TCL_ERROR;
		}
		Tcl_SetObjResult(interp, Tcl_NewWideIntObj(1));
	    } else {
		Tcl_Obj *nullObjPtr;

		TclNewObj(nullObjPtr);
		valueObjPtr = Tcl_ObjSetVar2(interp, objv[3], NULL,
			nullObjPtr, TCL_LEAVE_ERR_MSG);
		if (valueObjPtr == NULL) {
		    return TCL_ERROR;
		}
		Tcl_SetObjResult(interp, Tcl_NewWideIntObj(0));
	    }

    if ((objc != 1) && (objc != 2)) {
	Tcl_WrongNumArgs(interp, 1, objv, "?interp?");
	return TCL_ERROR;
    }

    target = interp;
    if (objc == 2) {
	target = Tcl_GetChild(interp, TclGetString(objv[1]));
	if (target == NULL) {
	    return TCL_ERROR;
	}
    }

    iPtr = (Interp *) target;
    Tcl_SetObjResult(interp, iPtr->errorStack);

			TclGetOriginalCommand((Tcl_Command) cmdPtr);
		if (realCmdPtr != NULL && TclIsProc(realCmdPtr)) {
		    goto simpleProcOK;
		}
	    } else {
	    simpleProcOK:
		if (specificNsInPattern) {
		    TclNewObj(elemObjPtr);
		    Tcl_GetCommandFullName(interp, (Tcl_Command) cmdPtr,
			    elemObjPtr);
		} else {
		    elemObjPtr = Tcl_NewStringObj(simplePattern, -1);
		}
		Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr);
	    }
	}
    } else
#endif /* !INFO_PROCS_SEARCH_GLOBAL_NS */
    {
	entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
	while (entryPtr != NULL) {
	    cmdName = (const char *)Tcl_GetHashKey(&nsPtr->cmdTable, entryPtr);
	    if ((simplePattern == NULL)
		    || Tcl_StringMatch(cmdName, simplePattern)) {
		cmdPtr = (Command *)Tcl_GetHashValue(entryPtr);

		if (!TclIsProc(cmdPtr)) {
		    realCmdPtr = (Command *)
			    TclGetOriginalCommand((Tcl_Command)cmdPtr);
		    if (realCmdPtr != NULL && TclIsProc(realCmdPtr)) {
			goto procOK;
		    }
		} else {
		procOK:
		    if (specificNsInPattern) {
			TclNewObj(elemObjPtr);
			Tcl_GetCommandFullName(interp, (Tcl_Command)cmdPtr,
				elemObjPtr);
		    } else {
			elemObjPtr = Tcl_NewStringObj(cmdName, -1);
		    }
		    Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr);
		}
	    }

    command = Tcl_FindCommand(interp, TclGetString(objv[1]), NULL,
	    TCL_LEAVE_ERR_MSG);
    if (command == NULL) {
	return TCL_ERROR;
    }

    /*
     * There's one special case: safe interpreters can't see aliases as
     * aliases as they're part of the security mechanisms.
     */

    if (Tcl_IsSafe(interp)
	    && (((Command *) command)->objProc == TclAliasObjCmd)) {
	Tcl_AppendResult(interp, "native", NULL);
    } else {

    (void) TclGetStringFromObj(joinObjPtr, &length);
    if (length == 0) {
	resObjPtr = TclStringCat(interp, listLen, elemPtrs, 0);
    } else {
	int i;

	TclNewObj(resObjPtr);
	for (i = 0;  i < listLen;  i++) {
	    if (i > 0) {

		/*
		 * NOTE: This code is relying on Tcl_AppendObjToObj() **NOT**
		 * to shimmer joinObjPtr.  If it did, then the case where
		 * objv[1] and objv[2] are the same value would not be safe.

    static const char *const options[] = {
	"-all",	    "-ascii",   "-bisect", "-decreasing", "-dictionary",
	"-exact",   "-glob",    "-increasing", "-index",
	"-inline",  "-integer", "-nocase",     "-not",
	"-real",    "-regexp",  "-sorted",     "-start", "-stride",
	"-subindices", NULL
    };
    enum lsearchoptions {
	LSEARCH_ALL, LSEARCH_ASCII, LSEARCH_BISECT, LSEARCH_DECREASING,
	LSEARCH_DICTIONARY, LSEARCH_EXACT, LSEARCH_GLOB, LSEARCH_INCREASING,
	LSEARCH_INDEX, LSEARCH_INLINE, LSEARCH_INTEGER, LSEARCH_NOCASE,
	LSEARCH_NOT, LSEARCH_REAL, LSEARCH_REGEXP, LSEARCH_SORTED,
	LSEARCH_START, LSEARCH_STRIDE, LSEARCH_SUBINDICES
    };
    enum datatypes {

    for (i = 1; i < objc-2; i++) {
	if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0, &index)
		!= TCL_OK) {
	    result = TCL_ERROR;
	    goto done;
	}
	switch ((enum lsearchoptions) index) {
	case LSEARCH_ALL:		/* -all */
	    allMatches = 1;
	    break;
	case LSEARCH_ASCII:		/* -ascii */
	    dataType = ASCII;
	    break;
	case LSEARCH_BISECT:		/* -bisect */

	 * "did not match anything at all" result straight away. [Bug 1374778]
	 */

	if (start > listc-1) {
	    if (allMatches || inlineReturn) {
		Tcl_ResetResult(interp);
	    } else {
		TclNewIntObj(itemPtr, TCL_INDEX_NONE);
		Tcl_SetObjResult(interp, itemPtr);
	    }
	    goto done;
	}

	/*
	 * If start points within a group, it points to the start of the group.
	 */

		} else {
		    itemPtr = listv[i];
		    Tcl_ListObjAppendElement(interp, listPtr, itemPtr);
		}
	    } else if (returnSubindices) {
		int j;

		TclNewIntObj(itemPtr, i+groupOffset);
		for (j=0 ; j<sortInfo.indexc ; j++) {
		    Tcl_Obj *elObj;
		    TclNewIntObj(elObj, TclIndexDecode(sortInfo.indexv[j], listc));
		    Tcl_ListObjAppendElement(interp, itemPtr, elObj);

		}
		Tcl_ListObjAppendElement(interp, listPtr, itemPtr);
	    } else {
		Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewWideIntObj(i));
	    }
	}
    }

    /*
     * Return everything or a single value.
     */

    if (allMatches) {
	Tcl_SetObjResult(interp, listPtr);
    } else if (!inlineReturn) {
	if (returnSubindices) {
	    int j;

	    TclNewIntObj(itemPtr, index+groupOffset);
	    for (j=0 ; j<sortInfo.indexc ; j++) {
		Tcl_Obj *elObj;
		TclNewIntObj(elObj, TclIndexDecode(sortInfo.indexv[j], listc));
		Tcl_ListObjAppendElement(interp, itemPtr, elObj);

	    }
	    Tcl_SetObjResult(interp, itemPtr);
	} else {
		Tcl_Obj *elObj;
		TclNewIntObj(elObj, index);
	    Tcl_SetObjResult(interp, elObj);
	}
    } else if (index < 0) {
	/*
	 * Is this superfluous? The result should be a blank object by
	 * default...
	 */

	listRepPtr = ListRepPtr(resultPtr);
	newArray = &listRepPtr->elements;
	if (group) {
	    for (i=0; elementPtr!=NULL ; elementPtr=elementPtr->nextPtr) {
		idx = elementPtr->payload.index;
		for (j = 0; j < groupSize; j++) {
		    if (indices) {
			TclNewIntObj(objPtr, idx + j - groupOffset);
			newArray[i++] = objPtr;
			Tcl_IncrRefCount(objPtr);
		    } else {
			objPtr = listObjPtrs[idx + j - groupOffset];
			newArray[i++] = objPtr;
			Tcl_IncrRefCount(objPtr);
		    }
		}
	    }
	} else if (indices) {
	    for (i=0; elementPtr != NULL ; elementPtr = elementPtr->nextPtr) {
		TclNewIntObj(objPtr, elementPtr->payload.index);
		newArray[i++] = objPtr;
		Tcl_IncrRefCount(objPtr);
	    }
	} else {
	    for (i=0; elementPtr != NULL ; elementPtr = elementPtr->nextPtr) {
		objPtr = elementPtr->payload.objPtr;
		newArray[i++] = objPtr;

    Tcl_Obj *objPtr, *startIndex = NULL, *resultPtr = NULL;
    Tcl_RegExpInfo info;
    static const char *const options[] = {
	"-all",		"-about",	"-indices",	"-inline",
	"-expanded",	"-line",	"-linestop",	"-lineanchor",
	"-nocase",	"-start",	"--",		NULL
    };
    enum regexpoptions {
	REGEXP_ALL,	REGEXP_ABOUT,	REGEXP_INDICES,	REGEXP_INLINE,
	REGEXP_EXPANDED,REGEXP_LINE,	REGEXP_LINESTOP,REGEXP_LINEANCHOR,
	REGEXP_NOCASE,	REGEXP_START,	REGEXP_LAST
    };

    indices = 0;
    about = 0;

	if (name[0] != '-') {
	    break;
	}
	if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", TCL_EXACT,
		&index) != TCL_OK) {
	    goto optionError;
	}
	switch ((enum regexpoptions) index) {
	case REGEXP_ALL:
	    all = 1;
	    break;
	case REGEXP_INDICES:
	    indices = 1;
	    break;
	case REGEXP_INLINE:

	    /*
	     * It's the number of substitutions, plus one for the matchVar at
	     * index 0
	     */

	    objc = info.nsubs + 1;
	    if (all <= 1) {
		TclNewObj(resultPtr);
	    }
	}
	for (i = 0; i < objc; i++) {
	    Tcl_Obj *newPtr;

	    if (indices) {
		int start, end;

			end--;
		    }
		} else {
		    start = -1;
		    end = -1;
		}

		TclNewIntObj(objs[0], start);
		TclNewIntObj(objs[1], end);

		newPtr = Tcl_NewListObj(2, objs);
	    } else {
		if (i <= info.nsubs) {
		    newPtr = Tcl_GetRange(objPtr,
			    offset + info.matches[i].start,
			    offset + info.matches[i].end - 1);
		} else {
		    TclNewObj(newPtr);
		}
	    }
	    if (doinline) {
		if (Tcl_ListObjAppendElement(interp, resultPtr, newPtr)
			!= TCL_OK) {
		    Tcl_DecrRefCount(newPtr);
		    Tcl_DecrRefCount(resultPtr);

    Tcl_UniChar ch, *wsrc, *wfirstChar, *wstring, *wsubspec = 0, *wend;

    static const char *const options[] = {
	"-all",		"-command",	"-expanded",	"-line",
	"-linestop",	"-lineanchor",	"-nocase",	"-start",
	"--",		NULL
    };
    enum regsubobjoptions {
	REGSUB_ALL,	 REGSUB_COMMAND,    REGSUB_EXPANDED, REGSUB_LINE,
	REGSUB_LINESTOP, REGSUB_LINEANCHOR, REGSUB_NOCASE,   REGSUB_START,
	REGSUB_LAST
    };

    cflags = TCL_REG_ADVANCED;
    all = 0;

	if (name[0] != '-') {
	    break;
	}
	if (Tcl_GetIndexFromObj(interp, objv[idx], options, "option",
		TCL_EXACT, &index) != TCL_OK) {
	    goto optionError;
	}
	switch ((enum regsubobjoptions) index) {
	case REGSUB_ALL:
	    all = 1;
	    break;
	case REGSUB_NOCASE:
	    cflags |= TCL_REG_NOCASE;
	    break;
	case REGSUB_COMMAND:

	    for (idx = 0 ; idx <= info.nsubs ; idx++) {
		subStart = info.matches[idx].start;
		subEnd = info.matches[idx].end;
		if ((subStart >= 0) && (subEnd >= 0)) {
		    args[idx + numParts] = Tcl_NewUnicodeObj(
			    wstring + offset + subStart, subEnd - subStart);
		} else {
		    TclNewObj(args[idx + numParts]);
		}
		Tcl_IncrRefCount(args[idx + numParts]);
	    }

	    /*
	     * At this point, we're locally holding the references to the
	     * argument words we added for this time round the loop, and the

    } else {
	Tcl_WrongNumArgs(interp, 1, objv, "string ?splitChars?");
	return TCL_ERROR;
    }

    stringPtr = TclGetStringFromObj(objv[1], &stringLen);
    end = stringPtr + stringLen;
    TclNewObj(listPtr);

    if (stringLen == 0) {
	/*
	 * Do nothing.
	 */
    } else if (splitCharLen == 0) {
	Tcl_HashTable charReuseTable;

	"alnum",	"alpha",	"ascii",	"control",
	"boolean",	"dict",		"digit",	"double",
	"entier",	"false",	"graph",	"integer",
	"list",		"lower",	"print",	"punct",
	"space",	"true",		"upper",	"wideinteger",
	"wordchar",	"xdigit",	NULL
    };
    enum isClassesEnum {
	STR_IS_ALNUM,	STR_IS_ALPHA,	STR_IS_ASCII,	STR_IS_CONTROL,
	STR_IS_BOOL,	STR_IS_DICT,	STR_IS_DIGIT,	STR_IS_DOUBLE,
	STR_IS_ENTIER,	STR_IS_FALSE,	STR_IS_GRAPH,	STR_IS_INT,
	STR_IS_LIST,	STR_IS_LOWER,	STR_IS_PRINT,	STR_IS_PUNCT,
	STR_IS_SPACE,	STR_IS_TRUE,	STR_IS_UPPER,	STR_IS_WIDE,
	STR_IS_WORD,	STR_IS_XDIGIT
    };
    static const char *const isOptions[] = {
	"-strict", "-failindex", NULL
    };
    enum isOptionsEnum {
	OPT_STRICT, OPT_FAILIDX
    };

    if (objc < 3 || objc > 6) {
	Tcl_WrongNumArgs(interp, 1, objv,
		"class ?-strict? ?-failindex var? str");
	return TCL_ERROR;

	for (i = 2; i < objc-1; i++) {
	    int idx2;

	    if (Tcl_GetIndexFromObj(interp, objv[i], isOptions, "option", 0,
		    &idx2) != TCL_OK) {
		return TCL_ERROR;
	    }
	    switch ((enum isOptionsEnum) idx2) {
	    case OPT_STRICT:
		strict = 1;
		break;
	    case OPT_FAILIDX:
		if (i+1 >= objc-1) {
		    Tcl_WrongNumArgs(interp, 2, objv,
			    "?-strict? ?-failindex var? str");

    objPtr = objv[objc-1];

    /*
     * When entering here, result == 1 and failat == 0.
     */

    switch ((enum isClassesEnum) index) {
    case STR_IS_ALNUM:
	chcomp = Tcl_UniCharIsAlnum;
	break;
    case STR_IS_ALPHA:
	chcomp = Tcl_UniCharIsAlpha;
	break;
    case STR_IS_ASCII:

    /*
     * Only set the failVarObj when we will return 0 and we have indicated a
     * valid fail index (>= 0).
     */

 str_is_done:
    if ((result == 0) && (failVarObj != NULL)) {
	TclNewIntObj(objPtr, failat);
	if (Tcl_ObjSetVar2(interp, failVarObj, NULL, objPtr, TCL_LEAVE_ERR_MSG) == NULL) {
	    return TCL_ERROR;
	}
    }
    Tcl_SetObjResult(interp, Tcl_NewBooleanObj(result));
    return TCL_OK;
}

static int
UniCharIsAscii(

StringStartCmd(
    TCL_UNUSED(ClientData),
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int ch;
    const Tcl_UniChar *p, *string;
    int cur, index, length;
    Tcl_Obj *obj;

    if (objc != 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "string index");
	return TCL_ERROR;
    }

    string = Tcl_GetUnicodeFromObj(objv[1], &length);

    if (TclGetIntForIndexM(interp, objv[2], length-1, &index) != TCL_OK) {
	return TCL_ERROR;
    }

    if (index >= length) {
	index = length - 1;
    }
    cur = 0;
    if (index > 0) {
	p = &string[index];

	(void)TclUniCharToUCS4(p, &ch);
	for (cur = index; cur >= 0; cur--) {
	    int delta = 0;
	    const Tcl_UniChar *next;

	    if (!Tcl_UniCharIsWordChar(ch)) {
		break;
	    }

	    next = TclUCS4Prev(p, string);
	    do {
		next += delta;
		delta = TclUniCharToUCS4(next, &ch);
	    } while (next + delta < p);
	    p = next;
	}
	if (cur != index) {
	    cur += 1;
	}
    }
    TclNewIntObj(obj, cur);
    Tcl_SetObjResult(interp, obj);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * StringEndCmd --

StringEndCmd(
    TCL_UNUSED(ClientData),
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    int ch;
    const Tcl_UniChar *p, *end, *string;
    int cur, index, length;
    Tcl_Obj *obj;

    if (objc != 3) {
	Tcl_WrongNumArgs(interp, 1, objv, "string index");
	return TCL_ERROR;
    }

    string = Tcl_GetUnicodeFromObj(objv[1], &length);

    if (TclGetIntForIndexM(interp, objv[2], length-1, &index) != TCL_OK) {
	return TCL_ERROR;
    }

    if (index < 0) {
	index = 0;
    }
    if (index < length) {
	p = &string[index];
	end = string+length;
	for (cur = index; p < end; cur++) {
	    p += TclUniCharToUCS4(p, &ch);
	    if (!Tcl_UniCharIsWordChar(ch)) {
		break;
	    }
	}
	if (cur == index) {
	    cur++;
	}
    } else {
	cur = length;
    }
    TclNewIntObj(obj, cur);
    Tcl_SetObjResult(interp, obj);
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * StringEqualCmd --

     * -glob, you *must* fix TclCompileSwitchCmd's option parser as well.
     */

    static const char *const options[] = {
	"-exact", "-glob", "-indexvar", "-matchvar", "-nocase", "-regexp",
	"--", NULL
    };
    enum switchOptionsEnum {
	OPT_EXACT, OPT_GLOB, OPT_INDEXV, OPT_MATCHV, OPT_NOCASE, OPT_REGEXP,
	OPT_LAST
    };
    typedef int (*strCmpFn_t)(const char *, const char *);
    strCmpFn_t strCmpFn = TclUtfCmp;

    mode = OPT_EXACT;
    foundmode = 0;
    indexVarObj = NULL;
    matchVarObj = NULL;
    numMatchesSaved = 0;
    noCase = 0;
    for (i = 1; i < objc-2; i++) {
	if (TclGetString(objv[i])[0] != '-') {
	    break;
	}
	if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
		&index) != TCL_OK) {
	    return TCL_ERROR;
	}
	switch ((enum switchOptionsEnum) index) {
	    /*
	     * General options.
	     */

	case OPT_LAST:
	    i++;
	    goto finishedOptions;

	}

	for (j=0 ; j<=info.nsubs ; j++) {
	    if (indexVarObj != NULL) {
		Tcl_Obj *rangeObjAry[2];

		if (info.matches[j].end > 0) {
		    TclNewIntObj(rangeObjAry[0], info.matches[j].start);
		    TclNewIntObj(rangeObjAry[1], info.matches[j].end-1);
		} else {
		    TclNewIntObj(rangeObjAry[1], TCL_INDEX_NONE);
		    rangeObjAry[0] = rangeObjAry[1];
		}

		/*
		 * Never fails; the object is always clean at this point.
		 */

		Tcl_ListObjAppendElement(NULL, indicesObj,