| .. | |||||
| encoding | |||||
| http1.0 | |||||
| msgs | |||||
| opt0.4 | |||||
| auto.tcl | |||||
| clock.tcl | |||||
| history.tcl | |||||
| init.tcl | |||||
| package.tcl | |||||
| parray.tcl | |||||
| safe.tcl | |||||
| tclDTrace.d | |||||
| tclIndex | |||||
| tm.tcl | |||||
| word.tcl |
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# init.tcl --
#
# Default system startup file for Tcl-based applications. Defines
# "unknown" procedure and auto-load facilities.
#
# Copyright (c) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
# Copyright (c) 1998-1999 Scriptics Corporation.
# 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.
#
if {[info commands package] == ""} {
error "version mismatch: library\nscripts expect Tcl version 7.5b1 or later but the loaded version is\nonly [info patchlevel]"
}
package require -exact Tcl 8.5.13
# Compute the auto path to use in this interpreter.
# The values on the path come from several locations:
#
# The environment variable TCLLIBPATH
#
# tcl_library, which is the directory containing this init.tcl script.
# [tclInit] (Tcl_Init()) searches around for the directory containing this
# init.tcl and defines tcl_library to that location before sourcing it.
#
# The parent directory of tcl_library. Adding the parent
# means that packages in peer directories will be found automatically.
#
# Also add the directory ../lib relative to the directory where the
# executable is located. This is meant to find binary packages for the
# same architecture as the current executable.
#
# tcl_pkgPath, which is set by the platform-specific initialization routines
# On UNIX it is compiled in
# On Windows, it is not used
if {![info exists auto_path]} {
if {[info exists env(TCLLIBPATH)]} {
set auto_path $env(TCLLIBPATH)
} else {
set auto_path ""
}
}
namespace eval tcl {
variable Dir
foreach Dir [list $::tcl_library] {
if {$Dir ni $::auto_path} {
lappend ::auto_path $Dir
}
}
catch {
foreach Dir $::tcl_pkgPath {
if {$Dir ni $::auto_path} {
lappend ::auto_path $Dir
}
}
}
if {![interp issafe]} {
variable Path [encoding dirs]
set Dir [file join $::tcl_library encoding]
if {$Dir ni $Path} {
lappend Path $Dir
encoding dirs $Path
}
}
# TIP #255 min and max functions
namespace eval mathfunc {
proc min {args} {
if {[llength $args] == 0} {
return -code error \
"too few arguments to math function \"min\""
}
set val Inf
foreach arg $args {
# This will handle forcing the numeric value without
# ruining the internal type of a numeric object
if {[catch {expr {double($arg)}} err]} {
return -code error $err
}
if {$arg < $val} { set val $arg }
}
return $val
}
proc max {args} {
if {[llength $args] == 0} {
return -code error \
"too few arguments to math function \"max\""
}
set val -Inf
foreach arg $args {
# This will handle forcing the numeric value without
# ruining the internal type of a numeric object
if {[catch {expr {double($arg)}} err]} {
return -code error $err
}
if {$arg > $val} { set val $arg }
}
return $val
}
namespace export min max
}
}
# Windows specific end of initialization
if {(![interp issafe]) && ($tcl_platform(platform) eq "windows")} {
namespace eval tcl {
proc EnvTraceProc {lo n1 n2 op} {
set x $::env($n2)
set ::env($lo) $x
set ::env([string toupper $lo]) $x
}
proc InitWinEnv {} {
global env tcl_platform
foreach p [array names env] {
set u [string toupper $p]
if {$u ne $p} {
switch -- $u {
COMSPEC -
PATH {
if {![info exists env($u)]} {
set env($u) $env($p)
}
trace add variable env($p) write \
[namespace code [list EnvTraceProc $p]]
trace add variable env($u) write \
[namespace code [list EnvTraceProc $p]]
}
}
}
}
if {![info exists env(COMSPEC)]} {
if {$tcl_platform(os) eq "Windows NT"} {
set env(COMSPEC) cmd.exe
} else {
set env(COMSPEC) command.com
}
}
}
InitWinEnv
}
}
# Setup the unknown package handler
if {[interp issafe]} {
package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
} else {
# Set up search for Tcl Modules (TIP #189).
# and setup platform specific unknown package handlers
if {$::tcl_platform(os) eq "Darwin"
&& $::tcl_platform(platform) eq "unix"} {
package unknown {::tcl::tm::UnknownHandler \
{::tcl::MacOSXPkgUnknown ::tclPkgUnknown}}
} else {
package unknown {::tcl::tm::UnknownHandler ::tclPkgUnknown}
}
# Set up the 'clock' ensemble
namespace eval ::tcl::clock [list variable TclLibDir $::tcl_library]
proc clock args {
namespace eval ::tcl::clock [list namespace ensemble create -command \
[uplevel 1 [list namespace origin [lindex [info level 0] 0]]] \
-subcommands {
add clicks format microseconds milliseconds scan seconds
}]
# Auto-loading stubs for 'clock.tcl'
foreach cmd {add format scan} {
proc ::tcl::clock::$cmd args {
variable TclLibDir
source -encoding utf-8 [file join $TclLibDir clock.tcl]
return [uplevel 1 [info level 0]]
}
}
return [uplevel 1 [info level 0]]
}
}
# Conditionalize for presence of exec.
if {[namespace which -command exec] eq ""} {
# Some machines do not have exec. Also, on all
# platforms, safe interpreters do not have exec.
set auto_noexec 1
}
# Define a log command (which can be overwitten to log errors
# differently, specially when stderr is not available)
if {[namespace which -command tclLog] eq ""} {
proc tclLog {string} {
catch {puts stderr $string}
}
}
# unknown --
# This procedure is called when a Tcl command is invoked that doesn't
# exist in the interpreter. It takes the following steps to make the
# command available:
#
# 1. See if the command has the form "namespace inscope ns cmd" and
# if so, concatenate its arguments onto the end and evaluate it.
# 2. See if the autoload facility can locate the command in a
# Tcl script file. If so, load it and execute it.
# 3. If the command was invoked interactively at top-level:
# (a) see if the command exists as an executable UNIX program.
# If so, "exec" the command.
# (b) see if the command requests csh-like history substitution
# in one of the common forms !!, !<number>, or ^old^new. If
# so, emulate csh's history substitution.
# (c) see if the command is a unique abbreviation for another
# command. If so, invoke the command.
#
# Arguments:
# args - A list whose elements are the words of the original
# command, including the command name.
proc unknown args {
variable ::tcl::UnknownPending
global auto_noexec auto_noload env tcl_interactive
# If the command word has the form "namespace inscope ns cmd"
# then concatenate its arguments onto the end and evaluate it.
set cmd [lindex $args 0]
if {[regexp "^:*namespace\[ \t\n\]+inscope" $cmd] && [llength $cmd] == 4} {
#return -code error "You need an {*}"
set arglist [lrange $args 1 end]
set ret [catch {uplevel 1 ::$cmd $arglist} result opts]
dict unset opts -errorinfo
dict incr opts -level
return -options $opts $result
}
catch {set savedErrorInfo $::errorInfo}
catch {set savedErrorCode $::errorCode}
set name $cmd
if {![info exists auto_noload]} {
#
# Make sure we're not trying to load the same proc twice.
#
if {[info exists UnknownPending($name)]} {
return -code error "self-referential recursion\
in \"unknown\" for command \"$name\"";
}
set UnknownPending($name) pending;
set ret [catch {
auto_load $name [uplevel 1 {::namespace current}]
} msg opts]
unset UnknownPending($name);
if {$ret != 0} {
dict append opts -errorinfo "\n (autoloading \"$name\")"
return -options $opts $msg
}
if {![array size UnknownPending]} {
unset UnknownPending
}
if {$msg} {
if {[info exists savedErrorCode]} {
set ::errorCode $savedErrorCode
} else {
unset -nocomplain ::errorCode
}
if {[info exists savedErrorInfo]} {
set ::errorInfo $savedErrorInfo
} else {
unset -nocomplain ::errorInfo
}
set code [catch {uplevel 1 $args} msg opts]
if {$code == 1} {
#
# Compute stack trace contribution from the [uplevel].
# Note the dependence on how Tcl_AddErrorInfo, etc.
# construct the stack trace.
#
set errorInfo [dict get $opts -errorinfo]
set errorCode [dict get $opts -errorcode]
set cinfo $args
if {[string bytelength $cinfo] > 150} {
set cinfo [string range $cinfo 0 150]
while {[string bytelength $cinfo] > 150} {
set cinfo [string range $cinfo 0 end-1]
}
append cinfo ...
}
append cinfo "\"\n (\"uplevel\" body line 1)"
append cinfo "\n invoked from within"
append cinfo "\n\"uplevel 1 \$args\""
#
# Try each possible form of the stack trace
# and trim the extra contribution from the matching case
#
set expect "$msg\n while executing\n\"$cinfo"
if {$errorInfo eq $expect} {
#
# The stack has only the eval from the expanded command
# Do not generate any stack trace here.
#
dict unset opts -errorinfo
dict incr opts -level
return -options $opts $msg
}
#
# Stack trace is nested, trim off just the contribution
# from the extra "eval" of $args due to the "catch" above.
#
set expect "\n invoked from within\n\"$cinfo"
set exlen [string length $expect]
set eilen [string length $errorInfo]
set i [expr {$eilen - $exlen - 1}]
set einfo [string range $errorInfo 0 $i]
#
# For now verify that $errorInfo consists of what we are about
# to return plus what we expected to trim off.
#
if {$errorInfo ne "$einfo$expect"} {
error "Tcl bug: unexpected stack trace in \"unknown\"" {} \
[list CORE UNKNOWN BADTRACE $einfo $expect $errorInfo]
}
return -code error -errorcode $errorCode \
-errorinfo $einfo $msg
} else {
dict incr opts -level
return -options $opts $msg
}
}
}
if {([info level] == 1) && ([info script] eq "") \
&& [info exists tcl_interactive] && $tcl_interactive} {
if {![info exists auto_noexec]} {
set new [auto_execok $name]
if {$new ne ""} {
set redir ""
if {[namespace which -command console] eq ""} {
set redir ">&@stdout <@stdin"
}
uplevel 1 [list ::catch \
[concat exec $redir $new [lrange $args 1 end]] \
::tcl::UnknownResult ::tcl::UnknownOptions]
dict incr ::tcl::UnknownOptions -level
return -options $::tcl::UnknownOptions $::tcl::UnknownResult
}
}
if {$name eq "!!"} {
set newcmd [history event]
} elseif {[regexp {^!(.+)$} $name -> event]} {
set newcmd [history event $event]
} elseif {[regexp {^\^([^^]*)\^([^^]*)\^?$} $name -> old new]} {
set newcmd [history event -1]
catch {regsub -all -- $old $newcmd $new newcmd}
}
if {[info exists newcmd]} {
tclLog $newcmd
history change $newcmd 0
uplevel 1 [list ::catch $newcmd \
::tcl::UnknownResult ::tcl::UnknownOptions]
dict incr ::tcl::UnknownOptions -level
return -options $::tcl::UnknownOptions $::tcl::UnknownResult
}
set ret [catch {set candidates [info commands $name*]} msg]
if {$name eq "::"} {
set name ""
}
if {$ret != 0} {
dict append opts -errorinfo \
"\n (expanding command prefix \"$name\" in unknown)"
return -options $opts $msg
}
# Filter out bogus matches when $name contained
# a glob-special char [Bug 946952]
if {$name eq ""} {
# Handle empty $name separately due to strangeness
# in [string first] (See RFE 1243354)
set cmds $candidates
} else {
set cmds [list]
foreach x $candidates {
if {[string first $name $x] == 0} {
lappend cmds $x
}
}
}
if {[llength $cmds] == 1} {
uplevel 1 [list ::catch [lreplace $args 0 0 [lindex $cmds 0]] \
::tcl::UnknownResult ::tcl::UnknownOptions]
dict incr ::tcl::UnknownOptions -level
return -options $::tcl::UnknownOptions $::tcl::UnknownResult
}
if {[llength $cmds]} {
return -code error "ambiguous command name \"$name\": [lsort $cmds]"
}
}
return -code error "invalid command name \"$name\""
}
# auto_load --
# Checks a collection of library directories to see if a procedure
# is defined in one of them. If so, it sources the appropriate
# library file to create the procedure. Returns 1 if it successfully
# loaded the procedure, 0 otherwise.
#
# Arguments:
# cmd - Name of the command to find and load.
# namespace (optional) The namespace where the command is being used - must be
# a canonical namespace as returned [namespace current]
# for instance. If not given, namespace current is used.
proc auto_load {cmd {namespace {}}} {
global auto_index auto_path
if {$namespace eq ""} {
set namespace [uplevel 1 [list ::namespace current]]
}
set nameList [auto_qualify $cmd $namespace]
# workaround non canonical auto_index entries that might be around
# from older auto_mkindex versions
lappend nameList $cmd
foreach name $nameList {
if {[info exists auto_index($name)]} {
namespace eval :: $auto_index($name)
# There's a couple of ways to look for a command of a given
# name. One is to use
# info commands $name
# Unfortunately, if the name has glob-magic chars in it like *
# or [], it may not match. For our purposes here, a better
# route is to use
# namespace which -command $name
if {[namespace which -command $name] ne ""} {
return 1
}
}
}
if {![info exists auto_path]} {
return 0
}
if {![auto_load_index]} {
return 0
}
foreach name $nameList {
if {[info exists auto_index($name)]} {
namespace eval :: $auto_index($name)
if {[namespace which -command $name] ne ""} {
return 1
}
}
}
return 0
}
# auto_load_index --
# Loads the contents of tclIndex files on the auto_path directory
# list. This is usually invoked within auto_load to load the index
# of available commands. Returns 1 if the index is loaded, and 0 if
# the index is already loaded and up to date.
#
# Arguments:
# None.
proc auto_load_index {} {
variable ::tcl::auto_oldpath
global auto_index auto_path
if {[info exists auto_oldpath] && ($auto_oldpath eq $auto_path)} {
return 0
}
set auto_oldpath $auto_path
# Check if we are a safe interpreter. In that case, we support only
# newer format tclIndex files.
set issafe [interp issafe]
for {set i [expr {[llength $auto_path] - 1}]} {$i >= 0} {incr i -1} {
set dir [lindex $auto_path $i]
set f ""
if {$issafe} {
catch {source [file join $dir tclIndex]}
} elseif {[catch {set f [open [file join $dir tclIndex]]}]} {
continue
} else {
set error [catch {
set id [gets $f]
if {$id eq "# Tcl autoload index file, version 2.0"} {
eval [read $f]
} elseif {$id eq "# Tcl autoload index file: each line identifies a Tcl"} {
while {[gets $f line] >= 0} {
if {([string index $line 0] eq "#") \
|| ([llength $line] != 2)} {
continue
}
set name [lindex $line 0]
set auto_index($name) \
"source [file join $dir [lindex $line 1]]"
}
} else {
error "[file join $dir tclIndex] isn't a proper Tcl index file"
}
} msg opts]
if {$f ne ""} {
close $f
}
if {$error} {
return -options $opts $msg
}
}
}
return 1
}
# auto_qualify --
#
# Compute a fully qualified names list for use in the auto_index array.
# For historical reasons, commands in the global namespace do not have leading
# :: in the index key. The list has two elements when the command name is
# relative (no leading ::) and the namespace is not the global one. Otherwise
# only one name is returned (and searched in the auto_index).
#
# Arguments -
# cmd The command name. Can be any name accepted for command
# invocations (Like "foo::::bar").
# namespace The namespace where the command is being used - must be
# a canonical namespace as returned by [namespace current]
# for instance.
proc auto_qualify {cmd namespace} {
# count separators and clean them up
# (making sure that foo:::::bar will be treated as foo::bar)
set n [regsub -all {::+} $cmd :: cmd]
# Ignore namespace if the name starts with ::
# Handle special case of only leading ::
# Before each return case we give an example of which category it is
# with the following form :
# ( inputCmd, inputNameSpace) -> output
if {[string match ::* $cmd]} {
if {$n > 1} {
# ( ::foo::bar , * ) -> ::foo::bar
return [list $cmd]
} else {
# ( ::global , * ) -> global
return [list [string range $cmd 2 end]]
}
}
# Potentially returning 2 elements to try :
# (if the current namespace is not the global one)
if {$n == 0} {
if {$namespace eq "::"} {
# ( nocolons , :: ) -> nocolons
return [list $cmd]
} else {
# ( nocolons , ::sub ) -> ::sub::nocolons nocolons
return [list ${namespace}::$cmd $cmd]
}
} elseif {$namespace eq "::"} {
# ( foo::bar , :: ) -> ::foo::bar
return [list ::$cmd]
} else {
# ( foo::bar , ::sub ) -> ::sub::foo::bar ::foo::bar
return [list ${namespace}::$cmd ::$cmd]
}
}
# auto_import --
#
# Invoked during "namespace import" to make see if the imported commands
# reside in an autoloaded library. If so, the commands are loaded so
# that they will be available for the import links. If not, then this
# procedure does nothing.
#
# Arguments -
# pattern The pattern of commands being imported (like "foo::*")
# a canonical namespace as returned by [namespace current]
proc auto_import {pattern} {
global auto_index
# If no namespace is specified, this will be an error case
if {![string match *::* $pattern]} {
return
}
set ns [uplevel 1 [list ::namespace current]]
set patternList [auto_qualify $pattern $ns]
auto_load_index
foreach pattern $patternList {
foreach name [array names auto_index $pattern] {
if {([namespace which -command $name] eq "")
&& ([namespace qualifiers $pattern] eq [namespace qualifiers $name])} {
namespace eval :: $auto_index($name)
}
}
}
}
# auto_execok --
#
# Returns string that indicates name of program to execute if
# name corresponds to a shell builtin or an executable in the
# Windows search path, or "" otherwise. Builds an associative
# array auto_execs that caches information about previous checks,
# for speed.
#
# Arguments:
# name - Name of a command.
if {$tcl_platform(platform) eq "windows"} {
# Windows version.
#
# Note that info executable doesn't work under Windows, so we have to
# look for files with .exe, .com, or .bat extensions. Also, the path
# may be in the Path or PATH environment variables, and path
# components are separated with semicolons, not colons as under Unix.
#
proc auto_execok name {
global auto_execs env tcl_platform
if {[info exists auto_execs($name)]} {
return $auto_execs($name)
}
set auto_execs($name) ""
set shellBuiltins [list cls copy date del erase dir echo mkdir \
md rename ren rmdir rd time type ver vol]
if {$tcl_platform(os) eq "Windows NT"} {
# NT includes the 'start' built-in
lappend shellBuiltins "start"
}
if {[info exists env(PATHEXT)]} {
# Add an initial ; to have the {} extension check first.
set execExtensions [split ";$env(PATHEXT)" ";"]
} else {
set execExtensions [list {} .com .exe .bat .cmd]
}
if {[string tolower $name] in $shellBuiltins} {
# When this is command.com for some reason on Win2K, Tcl won't
# exec it unless the case is right, which this corrects. COMSPEC
# may not point to a real file, so do the check.
set cmd $env(COMSPEC)
if {[file exists $cmd]} {
set cmd [file attributes $cmd -shortname]
}
return [set auto_execs($name) [list $cmd /c $name]]
}
if {[llength [file split $name]] != 1} {
foreach ext $execExtensions {
set file ${name}${ext}
if {[file exists $file] && ![file isdirectory $file]} {
return [set auto_execs($name) [list $file]]
}
}
return ""
}
set path "[file dirname [info nameof]];.;"
if {[info exists env(WINDIR)]} {
set windir $env(WINDIR)
}
if {[info exists windir]} {
if {$tcl_platform(os) eq "Windows NT"} {
append path "$windir/system32;"
}
append path "$windir/system;$windir;"
}
foreach var {PATH Path path} {
if {[info exists env($var)]} {
append path ";$env($var)"
}
}
foreach ext $execExtensions {
unset -nocomplain checked
foreach dir [split $path {;}] {
# Skip already checked directories
if {[info exists checked($dir)] || ($dir eq {})} {
continue
}
set checked($dir) {}
set file [file join $dir ${name}${ext}]
if {[file exists $file] && ![file isdirectory $file]} {
return [set auto_execs($name) [list $file]]
}
}
}
return ""
}
} else {
# Unix version.
#
proc auto_execok name {
global auto_execs env
if {[info exists auto_execs($name)]} {
return $auto_execs($name)
}
set auto_execs($name) ""
if {[llength [file split $name]] != 1} {
if {[file executable $name] && ![file isdirectory $name]} {
set auto_execs($name) [list $name]
}
return $auto_execs($name)
}
foreach dir [split $env(PATH) :] {
if {$dir eq ""} {
set dir .
}
set file [file join $dir $name]
if {[file executable $file] && ![file isdirectory $file]} {
set auto_execs($name) [list $file]
return $auto_execs($name)
}
}
return ""
}
}
# ::tcl::CopyDirectory --
#
# This procedure is called by Tcl's core when attempts to call the
# filesystem's copydirectory function fail. The semantics of the call
# are that 'dest' does not yet exist, i.e. dest should become the exact
# image of src. If dest does exist, we throw an error.
#
# Note that making changes to this procedure can change the results
# of running Tcl's tests.
#
# Arguments:
# action - "renaming" or "copying"
# src - source directory
# dest - destination directory
proc tcl::CopyDirectory {action src dest} {
set nsrc [file normalize $src]
set ndest [file normalize $dest]
if {$action eq "renaming"} {
# Can't rename volumes. We could give a more precise
# error message here, but that would break the test suite.
if {$nsrc in [file volumes]} {
return -code error "error $action \"$src\" to\
\"$dest\": trying to rename a volume or move a directory\
into itself"
}
}
if {[file exists $dest]} {
if {$nsrc eq $ndest} {
return -code error "error $action \"$src\" to\
\"$dest\": trying to rename a volume or move a directory\
into itself"
}
if {$action eq "copying"} {
# We used to throw an error here, but, looking more closely
# at the core copy code in tclFCmd.c, if the destination
# exists, then we should only call this function if -force
# is true, which means we just want to over-write. So,
# the following code is now commented out.
#
# return -code error "error $action \"$src\" to\
# \"$dest\": file already exists"
} else {
# Depending on the platform, and on the current
# working directory, the directories '.', '..'
# can be returned in various combinations. Anyway,
# if any other file is returned, we must signal an error.
set existing [glob -nocomplain -directory $dest * .*]
lappend existing {*}[glob -nocomplain -directory $dest \
-type hidden * .*]
foreach s $existing {
if {([file tail $s] ne ".") && ([file tail $s] ne "..")} {
return -code error "error $action \"$src\" to\
\"$dest\": file already exists"
}
}
}
} else {
if {[string first $nsrc $ndest] != -1} {
set srclen [expr {[llength [file split $nsrc]] -1}]
set ndest [lindex [file split $ndest] $srclen]
if {$ndest eq [file tail $nsrc]} {
return -code error "error $action \"$src\" to\
\"$dest\": trying to rename a volume or move a directory\
into itself"
}
}
file mkdir $dest
}
# Have to be careful to capture both visible and hidden files.
# We will also be more generous to the file system and not
# assume the hidden and non-hidden lists are non-overlapping.
#
# On Unix 'hidden' files begin with '.'. On other platforms
# or filesystems hidden files may have other interpretations.
set filelist [concat [glob -nocomplain -directory $src *] \
[glob -nocomplain -directory $src -types hidden *]]
foreach s [lsort -unique $filelist] {
if {([file tail $s] ne ".") && ([file tail $s] ne "..")} {
file copy -force $s [file join $dest [file tail $s]]
}
}
return
}
| .. | |||||
| encoding | |||||
| http1.0 | |||||
| msgs | |||||
| opt0.4 | |||||
| auto.tcl | |||||
| clock.tcl | |||||
| history.tcl | |||||
| init.tcl | |||||
| package.tcl | |||||
| parray.tcl | |||||
| safe.tcl | |||||
| tclDTrace.d | |||||
| tclIndex | |||||
| tm.tcl | |||||
| word.tcl |