Merge commit '9966985d896629eede849a84f18e406d1164a16c' as 'tcl8.6'

1 files changed, 1210 insertions, 0 deletions

diff --git a/tcl8.6/library/msgcat/msgcat.tcl b/tcl8.6/library/msgcat/msgcat.tcl
new file mode 100644
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+++ b/tcl8.6/library/msgcat/msgcat.tcl
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+# msgcat.tcl --
+#
+#	This file defines various procedures which implement a
+#	message catalog facility for Tcl programs.  It should be
+#	loaded with the command "package require msgcat".
+#
+# Copyright (c) 2010-2015 by Harald Oehlmann.
+# Copyright (c) 1998-2000 by Ajuba Solutions.
+# Copyright (c) 1998 by Mark Harrison.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+package require Tcl 8.5
+# When the version number changes, be sure to update the pkgIndex.tcl file,
+# and the installation directory in the Makefiles.
+package provide msgcat 1.6.0
+
+namespace eval msgcat {
+    namespace export mc mcexists mcload mclocale mcmax mcmset mcpreferences mcset\
+            mcunknown mcflset mcflmset mcloadedlocales mcforgetpackage\
+	    mcpackageconfig mcpackagelocale
+
+    # Records the list of locales to search
+    variable Loclist {}
+
+    # List of currently loaded locales
+    variable LoadedLocales {}
+
+    # Records the locale of the currently sourced message catalogue file
+    variable FileLocale
+
+    # Configuration values per Package (e.g. client namespace).
+    # The dict key is of the form "<option> <namespace>" and the value is the
+    # configuration option. A nonexisting key is an unset option.
+    variable PackageConfig [dict create mcfolder {} loadcmd {} changecmd {}\
+	    unknowncmd {} loadedlocales {} loclist {}]
+
+    # Records the mapping between source strings and translated strings.  The
+    # dict key is of the form "<namespace> <locale> <src>", where locale and
+    # namespace should be themselves dict values and the value is
+    # the translated string.
+    variable Msgs [dict create]
+
+    # Map of language codes used in Windows registry to those of ISO-639
+    if {[info sharedlibextension] eq ".dll"} {
+	variable WinRegToISO639 [dict create  {*}{
+	    01 ar 0401 ar_SA 0801 ar_IQ 0c01 ar_EG 1001 ar_LY 1401 ar_DZ
+		  1801 ar_MA 1c01 ar_TN 2001 ar_OM 2401 ar_YE 2801 ar_SY
+		  2c01 ar_JO 3001 ar_LB 3401 ar_KW 3801 ar_AE 3c01 ar_BH
+		  4001 ar_QA
+	    02 bg 0402 bg_BG
+	    03 ca 0403 ca_ES
+	    04 zh 0404 zh_TW 0804 zh_CN 0c04 zh_HK 1004 zh_SG 1404 zh_MO
+	    05 cs 0405 cs_CZ
+	    06 da 0406 da_DK
+	    07 de 0407 de_DE 0807 de_CH 0c07 de_AT 1007 de_LU 1407 de_LI
+	    08 el 0408 el_GR
+	    09 en 0409 en_US 0809 en_GB 0c09 en_AU 1009 en_CA 1409 en_NZ
+		  1809 en_IE 1c09 en_ZA 2009 en_JM 2409 en_GD 2809 en_BZ
+		  2c09 en_TT 3009 en_ZW 3409 en_PH
+	    0a es 040a es_ES 080a es_MX 0c0a es_ES@modern 100a es_GT 140a es_CR
+		  180a es_PA 1c0a es_DO 200a es_VE 240a es_CO 280a es_PE
+		  2c0a es_AR 300a es_EC 340a es_CL 380a es_UY 3c0a es_PY
+		  400a es_BO 440a es_SV 480a es_HN 4c0a es_NI 500a es_PR
+	    0b fi 040b fi_FI
+	    0c fr 040c fr_FR 080c fr_BE 0c0c fr_CA 100c fr_CH 140c fr_LU
+		  180c fr_MC
+	    0d he 040d he_IL
+	    0e hu 040e hu_HU
+	    0f is 040f is_IS
+	    10 it 0410 it_IT 0810 it_CH
+	    11 ja 0411 ja_JP
+	    12 ko 0412 ko_KR
+	    13 nl 0413 nl_NL 0813 nl_BE
+	    14 no 0414 no_NO 0814 nn_NO
+	    15 pl 0415 pl_PL
+	    16 pt 0416 pt_BR 0816 pt_PT
+	    17 rm 0417 rm_CH
+	    18 ro 0418 ro_RO 0818 ro_MO
+	    19 ru 0819 ru_MO
+	    1a hr 041a hr_HR 081a sr_YU 0c1a sr_YU@cyrillic
+	    1b sk 041b sk_SK
+	    1c sq 041c sq_AL
+	    1d sv 041d sv_SE 081d sv_FI
+	    1e th 041e th_TH
+	    1f tr 041f tr_TR
+	    20 ur 0420 ur_PK 0820 ur_IN
+	    21 id 0421 id_ID
+	    22 uk 0422 uk_UA
+	    23 be 0423 be_BY
+	    24 sl 0424 sl_SI
+	    25 et 0425 et_EE
+	    26 lv 0426 lv_LV
+	    27 lt 0427 lt_LT
+	    28 tg 0428 tg_TJ
+	    29 fa 0429 fa_IR
+	    2a vi 042a vi_VN
+	    2b hy 042b hy_AM
+	    2c az 042c az_AZ@latin 082c az_AZ@cyrillic
+	    2d eu
+	    2e wen 042e wen_DE
+	    2f mk 042f mk_MK
+	    30 bnt 0430 bnt_TZ
+	    31 ts 0431 ts_ZA
+	    32 tn
+	    33 ven 0433 ven_ZA
+	    34 xh 0434 xh_ZA
+	    35 zu 0435 zu_ZA
+	    36 af 0436 af_ZA
+	    37 ka 0437 ka_GE
+	    38 fo 0438 fo_FO
+	    39 hi 0439 hi_IN
+	    3a mt 043a mt_MT
+	    3b se 043b se_NO
+	    043c gd_UK 083c ga_IE
+	    3d yi 043d yi_IL
+	    3e ms 043e ms_MY 083e ms_BN
+	    3f kk 043f kk_KZ
+	    40 ky 0440 ky_KG
+	    41 sw 0441 sw_KE
+	    42 tk 0442 tk_TM
+	    43 uz 0443 uz_UZ@latin 0843 uz_UZ@cyrillic
+	    44 tt 0444 tt_RU
+	    45 bn 0445 bn_IN
+	    46 pa 0446 pa_IN
+	    47 gu 0447 gu_IN
+	    48 or 0448 or_IN
+	    49 ta
+	    4a te 044a te_IN
+	    4b kn 044b kn_IN
+	    4c ml 044c ml_IN
+	    4d as 044d as_IN
+	    4e mr 044e mr_IN
+	    4f sa 044f sa_IN
+	    50 mn
+	    51 bo 0451 bo_CN
+	    52 cy 0452 cy_GB
+	    53 km 0453 km_KH
+	    54 lo 0454 lo_LA
+	    55 my 0455 my_MM
+	    56 gl 0456 gl_ES
+	    57 kok 0457 kok_IN
+	    58 mni 0458 mni_IN
+	    59 sd
+	    5a syr 045a syr_TR
+	    5b si 045b si_LK
+	    5c chr 045c chr_US
+	    5d iu 045d iu_CA
+	    5e am 045e am_ET
+	    5f ber 045f ber_MA
+	    60 ks 0460 ks_PK 0860 ks_IN
+	    61 ne 0461 ne_NP 0861 ne_IN
+	    62 fy 0462 fy_NL
+	    63 ps
+	    64 tl 0464 tl_PH
+	    65 div 0465 div_MV
+	    66 bin 0466 bin_NG
+	    67 ful 0467 ful_NG
+	    68 ha 0468 ha_NG
+	    69 nic 0469 nic_NG
+	    6a yo 046a yo_NG
+	    70 ibo 0470 ibo_NG
+	    71 kau 0471 kau_NG
+	    72 om 0472 om_ET
+	    73 ti 0473 ti_ET
+	    74 gn 0474 gn_PY
+	    75 cpe 0475 cpe_US
+	    76 la 0476 la_VA
+	    77 so 0477 so_SO
+	    78 sit 0478 sit_CN
+	    79 pap 0479 pap_AN
+	}]
+    }
+}
+
+# msgcat::mc --
+#
+#	Find the translation for the given string based on the current
+#	locale setting. Check the local namespace first, then look in each
+#	parent namespace until the source is found.  If additional args are
+#	specified, use the format command to work them into the traslated
+#	string.
+#	If no catalog item is found, mcunknown is called in the caller frame
+#	and its result is returned.
+#
+# Arguments:
+#	src	The string to translate.
+#	args	Args to pass to the format command
+#
+# Results:
+#	Returns the translated string.  Propagates errors thrown by the
+#	format command.
+
+proc msgcat::mc {src args} {
+    # this may be replaced by:
+    # return [mcget -namespace [uplevel 1 [list ::namespace current]] --\
+    #	    $src {*}$args]
+
+    # Check for the src in each namespace starting from the local and
+    # ending in the global.
+
+    variable Msgs
+    variable Loclist
+
+    set ns [uplevel 1 [list ::namespace current]]
+    set loclist [PackagePreferences $ns]
+
+    set nscur $ns
+    while {$nscur != ""} {
+	foreach loc $loclist {
+	    if {[dict exists $Msgs $nscur $loc $src]} {
+		return [DefaultUnknown "" [dict get $Msgs $nscur $loc $src]\
+			{*}$args]
+	    }
+	}
+	set nscur [namespace parent $nscur]
+    }
+    # call package local or default unknown command
+    set args [linsert $args 0 [lindex $loclist 0] $src]
+    switch -exact -- [Invoke unknowncmd $args $ns result 1] {
+	0 { return [uplevel 1 [linsert $args 0 [namespace origin mcunknown]]] }
+	1 { return [DefaultUnknown {*}$args] }
+	default { return $result }
+    }
+}
+
+# msgcat::mcexists --
+#
+#	Check if a catalog item is set or if mc would invoke mcunknown.
+#
+# Arguments:
+#	-exactnamespace		Only check the exact namespace and no
+#				parent namespaces
+#	-exactlocale		Only check the exact locale and not all members
+#				of the preferences list
+#	src			Message catalog key
+#
+# Results:
+#	true if an adequate catalog key was found
+
+proc msgcat::mcexists {args} {
+
+    variable Msgs
+    variable Loclist
+    variable PackageConfig
+
+    set ns [uplevel 1 [list ::namespace current]]
+    set loclist [PackagePreferences $ns]
+
+    while {[llength $args] != 1} {
+	set args [lassign $args option]
+	switch -glob -- $option {
+	    -exactnamespace { set exactnamespace 1 }
+	    -exactlocale { set loclist [lrange $loclist 0 0] }
+	    -* { return -code error "unknown option \"$option\"" }
+	    default {
+		return -code error "wrong # args: should be\
+			\"[lindex [info level 0] 0] ?-exactnamespace?\
+			?-exactlocale? src\""
+	    }
+	}
+    }
+    set src [lindex $args 0]
+
+    while {$ns ne ""} {
+	foreach loc $loclist {
+	    if {[dict exists $Msgs $ns $loc $src]} {
+		return 1
+	    }
+	}
+	if {[info exists exactnamespace]} {return 0}
+	set ns [namespace parent $ns]
+    }
+    return 0
+}
+
+# msgcat::mclocale --
+#
+#	Query or set the current locale.
+#
+# Arguments:
+#	newLocale	(Optional) The new locale string. Locale strings
+#			should be composed of one or more sublocale parts
+#			separated by underscores (e.g. en_US).
+#
+# Results:
+#	Returns the normalized set locale.
+
+proc msgcat::mclocale {args} {
+    variable Loclist
+    variable LoadedLocales
+    set len [llength $args]
+
+    if {$len > 1} {
+	return -code error "wrong # args: should be\
+		\"[lindex [info level 0] 0] ?newLocale?\""
+    }
+
+    if {$len == 1} {
+	set newLocale [string tolower [lindex $args 0]]
+	if {$newLocale ne [file tail $newLocale]} {
+	    return -code error "invalid newLocale value \"$newLocale\":\
+		    could be path to unsafe code."
+	}
+	if {[lindex $Loclist 0] ne $newLocale} {
+	    set Loclist [GetPreferences $newLocale]
+
+	    # locale not loaded jet
+	    LoadAll $Loclist
+	    # Invoke callback
+	    Invoke changecmd $Loclist
+	}
+    }
+    return [lindex $Loclist 0]
+}
+
+# msgcat::GetPreferences --
+#
+#	Get list of locales from a locale.
+#	The first element is always the lowercase locale.
+#	Other elements have one component separated by "_" less.
+#	Multiple "_" are seen as one separator: de__ch_spec de__ch de {}
+#
+# Arguments:
+#	Locale.
+#
+# Results:
+#	Locale list
+
+proc msgcat::GetPreferences {locale} {
+    set locale [string tolower $locale]
+    set loclist [list $locale]
+    while {-1 !=[set pos [string last "_" $locale]]} {
+	set locale [string range $locale 0 $pos-1]
+	if { "_" ne [string index $locale end] } {
+	    lappend loclist $locale
+	}
+    }
+    if {"" ne [lindex $loclist end]} {
+	lappend loclist {}
+    }
+    return $loclist
+}
+
+# msgcat::mcpreferences --
+#
+#	Fetch the list of locales used to look up strings, ordered from
+#	most preferred to least preferred.
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	Returns an ordered list of the locales preferred by the user.
+
+proc msgcat::mcpreferences {} {
+    variable Loclist
+    return $Loclist
+}
+
+# msgcat::mcloadedlocales --
+#
+#	Get or change the list of currently loaded default locales
+#
+#	The following subcommands are available:
+#	loaded
+#	    Get the current list of loaded locales
+#	clear
+#	    Remove all loaded locales not present in mcpreferences.
+#
+# Arguments:
+#	subcommand		One of loaded or clear
+#
+# Results:
+#	Empty string, if not stated differently for the subcommand
+
+proc msgcat::mcloadedlocales {subcommand} {
+    variable Loclist
+    variable LoadedLocales
+    variable Msgs
+    variable PackageConfig
+    switch -exact -- $subcommand {
+	clear {
+	    # Remove all locales not contained in Loclist
+	    # skip any packages with package locale
+	    set LoadedLocales $Loclist
+	    foreach ns [dict keys $Msgs] {
+		if {![dict exists $PackageConfig loclist $ns]} {
+		    foreach locale [dict keys [dict get $Msgs $ns]] {
+			if {$locale ni $Loclist} {
+			    dict unset Msgs $ns $locale
+			}
+		    }
+		}
+	    }
+	}
+	loaded { return $LoadedLocales }
+	default {
+	    return -code error "unknown subcommand \"$subcommand\": must be\
+		    clear, or loaded"
+	}
+    }
+    return
+}
+
+# msgcat::mcpackagelocale --
+#
+#	Get or change the package locale of the calling package.
+#
+#	The following subcommands are available:
+#	set
+#	    Set a package locale.
+#	    This may load message catalog files and may clear message catalog
+#	    items, if the former locale was the default locale.
+#	    Returns the normalized set locale.
+#	    The default locale is taken, if locale is not given.
+#	get
+#	    Get the locale valid for this package.
+#	isset
+#	    Returns true, if a package locale is set
+#	unset
+#	    Unset the package locale and activate the default locale.
+#	    This loads message catalog file which where missing in the package
+#	    locale.
+#	preferences
+#	    Return locale preference list valid for the package.
+#	loaded
+#	    Return loaded locale list valid for the current package.
+#	clear
+#	    If the current package has a package locale, remove all package
+#	    locales not containes in package mcpreferences.
+#	    It is an error to call this without a package locale set.
+#
+#	The subcommands get, preferences and loaded return the corresponding
+#	default data, if no package locale is set.
+#
+# Arguments:
+#	subcommand		see list above
+#	locale			package locale (only set subcommand)
+#
+# Results:
+#	Empty string, if not stated differently for the subcommand
+
+proc msgcat::mcpackagelocale {subcommand {locale ""}} {
+    # todo: implement using an ensemble
+    variable Loclist
+    variable LoadedLocales
+    variable Msgs
+    variable PackageConfig
+    # Check option
+    # check if required item is exactly provided
+    if {[llength [info level 0]] == 2} {
+	# locale not given
+	unset locale
+    } else {
+	# locale given
+	if {$subcommand in
+		{"get" "isset" "unset" "preferences" "loaded" "clear"} } {
+	    return -code error "wrong # args: should be\
+		    \"[lrange [info level 0] 0 1]\""
+	}
+        set locale [string tolower $locale]
+    }
+    set ns [uplevel 1 {::namespace current}]
+
+    switch -exact -- $subcommand {
+	get { return [lindex [PackagePreferences $ns] 0] }
+	preferences { return [PackagePreferences $ns] }
+	loaded { return [PackageLocales $ns] }
+	present { return [expr {$locale in [PackageLocales $ns]} ]}
+	isset { return [dict exists $PackageConfig loclist $ns] }
+	set { # set a package locale or add a package locale
+
+	    # Copy the default locale if no package locale set so far
+	    if {![dict exists $PackageConfig loclist $ns]} {
+		dict set PackageConfig loclist $ns $Loclist
+		dict set PackageConfig loadedlocales $ns $LoadedLocales
+	    }
+
+	    # Check if changed
+	    set loclist [dict get $PackageConfig loclist $ns]
+	    if {! [info exists locale] || $locale eq [lindex $loclist 0] } {
+		return [lindex $loclist 0]
+	    }
+
+	    # Change loclist
+	    set loclist [GetPreferences $locale]
+	    set locale [lindex $loclist 0]
+	    dict set PackageConfig loclist $ns $loclist
+
+	    # load eventual missing locales
+	    set loadedLocales [dict get $PackageConfig loadedlocales $ns]
+	    if {$locale in $loadedLocales} { return $locale }
+	    set loadLocales [ListComplement $loadedLocales $loclist]
+	    dict set PackageConfig loadedlocales $ns\
+		    [concat $loadedLocales $loadLocales]
+	    Load $ns $loadLocales
+	    return $locale
+	}
+	clear { # Remove all locales not contained in Loclist
+	    if {![dict exists $PackageConfig loclist $ns]} {
+		return -code error "clear only when package locale set"
+	    }
+	    set loclist [dict get $PackageConfig loclist $ns]
+	    dict set PackageConfig loadedlocales $ns $loclist
+	    if {[dict exists $Msgs $ns]} {
+		foreach locale [dict keys [dict get $Msgs $ns]] {
+		    if {$locale ni $loclist} {
+			dict unset Msgs $ns $locale
+		    }
+		}
+	    }
+	}
+	unset {	# unset package locale and restore default locales
+
+	    if { ![dict exists $PackageConfig loclist $ns] } { return }
+
+	    # unset package locale
+	    set loadLocales [ListComplement\
+		    [dict get $PackageConfig loadedlocales $ns] $LoadedLocales]
+	    dict unset PackageConfig loadedlocales $ns
+	    dict unset PackageConfig loclist $ns
+
+	    # unset keys not in global loaded locales
+	    if {[dict exists $Msgs $ns]} {
+		foreach locale [dict keys [dict get $Msgs $ns]] {
+		    if {$locale ni $LoadedLocales} {
+			dict unset Msgs $ns $locale
+		    }
+		}
+	    }
+
+	    # Add missing locales
+	    Load $ns $loadLocales
+	}
+	default {
+	    return -code error "unknown subcommand \"$subcommand\": must be\
+		    clear, get, isset, loaded, present, set, or unset"
+	}
+    }
+    return
+}
+
+# msgcat::mcforgetpackage --
+#
+#	Remove any data of the calling package from msgcat
+#
+
+proc msgcat::mcforgetpackage {} {
+    # todo: this may be implemented using an ensemble
+    variable PackageConfig
+    variable Msgs
+    set ns [uplevel 1 {::namespace current}]
+    # Remove MC items
+    dict unset Msgs $ns
+    # Remove config items
+    foreach key [dict keys $PackageConfig] {
+	dict unset PackageConfig $key $ns
+    }
+    return
+}
+
+# msgcat::mcpackageconfig --
+#
+#	Get or modify the per caller namespace (e.g. packages) config options.
+#
+#	Available subcommands are:
+#
+#	    get		get the current value or an error if not set.
+#	    isset	return true, if the option is set
+#	    set		set the value (see also distinct option).
+#			Returns the number of loaded message files.
+#	    unset	Clear option. return "".
+#
+#	Available options are:
+#
+#	mcfolder
+#	    The message catalog folder of the package.
+#	    This is automatically set by mcload.
+#	    If the value is changed using the set subcommand, an evntual
+#	    loadcmd is invoked and all message files of the package locale are
+#	    loaded.
+#
+#	loadcmd
+#	    The command gets executed before a message file would be
+#	    sourced for this module.
+#	    The command is invoked with the expanded locale list to load.
+#	    The command is not invoked if the registering package namespace
+#	    is not present.
+#	    This callback might also be used as an alternative to message
+#	    files.
+#	    If the value is changed using the set subcommand, the callback is
+#	    directly invoked with the current file locale list. No file load is
+#	    executed.
+#
+#	changecmd
+#	    The command is invoked, after an executed locale change.
+#	    Appended argument is expanded mcpreferences.
+#
+#	unknowncmd
+#	    Use a package locale mcunknown procedure instead the global one.
+#	    The appended arguments are identical to mcunknown.
+#	    A default unknown handler is used if set to the empty string.
+#	    This consists in returning the key if no arguments are given.
+#	    With given arguments, format is used to process the arguments.
+#
+# Arguments:
+#	subcommand		Operation on the package
+#	option			The package option to get or set.
+#	?value?			Eventual value for the subcommand
+#
+# Results:
+#	Depends on the subcommand and option and is described there
+
+proc msgcat::mcpackageconfig {subcommand option {value ""}} {
+    variable PackageConfig
+    # get namespace
+    set ns [uplevel 1 {::namespace current}]
+
+    if {$option ni {"mcfolder" "loadcmd" "changecmd" "unknowncmd"}} {
+	return -code error "bad option \"$option\": must be mcfolder, loadcmd,\
+		changecmd, or unknowncmd"
+    }
+
+    # check if value argument is exactly provided
+    if {[llength [info level 0]] == 4 } {
+	# value provided
+	if {$subcommand in {"get" "isset" "unset"}} {
+	    return -code error "wrong # args: should be\
+		    \"[lrange [info level 0] 0 2] value\""
+	}
+    } elseif {$subcommand eq "set"} {
+        return -code error\
+		"wrong # args: should be \"[lrange [info level 0] 0 2]\""
+    }
+
+    # Execute subcommands
+    switch -exact -- $subcommand {
+	get {	# Operation get return current value
+	    if {![dict exists $PackageConfig $option $ns]} {
+		return -code error "package option \"$option\" not set"
+	    }
+	    return [dict get $PackageConfig $option $ns]
+	}
+	isset {	return [dict exists $PackageConfig $option $ns] }
+	unset {	dict unset PackageConfig $option $ns }
+	set {	# Set option
+
+	    if {$option eq "mcfolder"} {
+		set value [file normalize $value]
+	    }
+	    # Check if changed
+	    if { [dict exists $PackageConfig $option $ns]
+		    && $value eq [dict get $PackageConfig $option $ns] } {
+		return 0
+	    }
+
+	    # set new value
+	    dict set PackageConfig $option $ns $value
+
+	    # Reload pending message catalogs
+	    switch -exact -- $option {
+		mcfolder { return [Load $ns [PackageLocales $ns]] }
+		loadcmd { return [Load $ns [PackageLocales $ns] 1] }
+	    }
+	    return 0
+	}
+	default {
+	    return -code error "unknown subcommand \"$subcommand\":\
+		    must be get, isset, set, or unset"
+	}
+    }
+    return
+}
+
+# msgcat::PackagePreferences --
+#
+#	Return eventual present package preferences or the default list if not
+#	present.
+#
+# Arguments:
+#	ns		Package namespace
+#
+# Results:
+#	locale list
+
+proc msgcat::PackagePreferences {ns} {
+    variable PackageConfig
+    if {[dict exists $PackageConfig loclist $ns]} {
+	return [dict get $PackageConfig loclist $ns]
+    }
+    variable Loclist
+    return $Loclist
+}
+
+# msgcat::PackageLocales --
+#
+#	Return eventual present package locales or the default list if not
+#	present.
+#
+# Arguments:
+#	ns		Package namespace
+#
+# Results:
+#	locale list
+
+proc msgcat::PackageLocales {ns} {
+    variable PackageConfig
+    if {[dict exists $PackageConfig loadedlocales $ns]} {
+	return [dict get $PackageConfig loadedlocales $ns]
+    }
+    variable LoadedLocales
+    return $LoadedLocales
+}
+
+# msgcat::ListComplement --
+#
+#	Build the complement of two lists.
+#	Return a list with all elements in list2 but not in list1.
+#	Optionally return the intersection.
+#
+# Arguments:
+#	list1		excluded list
+#	list2		included list
+#	inlistname	If not "", write in this variable the intersection list
+#
+# Results:
+#	list with all elements in list2 but not in list1
+
+proc msgcat::ListComplement {list1 list2 {inlistname ""}} {
+    if {"" ne $inlistname} {
+	upvar 1 $inlistname inlist
+    }
+    set inlist {}
+    set outlist {}
+    foreach item $list2 {
+	if {$item in $list1} {
+	    lappend inlist $item
+	} else {
+	    lappend outlist $item
+	}
+    }
+    return $outlist
+}
+
+# msgcat::mcload --
+#
+#	Attempt to load message catalogs for each locale in the
+#	preference list from the specified directory.
+#
+# Arguments:
+#	langdir		The directory to search.
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::mcload {langdir} {
+    return [uplevel 1 [list\
+	    [namespace origin mcpackageconfig] set mcfolder $langdir]]
+}
+
+# msgcat::LoadAll --
+#
+#	Load a list of locales for all packages not having a package locale
+#	list.
+#
+# Arguments:
+#	langdir		The directory to search.
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::LoadAll {locales} {
+    variable PackageConfig
+    variable LoadedLocales
+    if {0 == [llength $locales]} { return {} }
+    # filter jet unloaded locales
+    set locales [ListComplement $LoadedLocales $locales]
+    if {0 == [llength $locales]} { return {} }
+    lappend LoadedLocales {*}$locales
+
+    set packages [lsort -unique [concat\
+	    [dict keys [dict get $PackageConfig loadcmd]]\
+	    [dict keys [dict get $PackageConfig mcfolder]]]]
+    foreach ns $packages {
+	if {! [dict exists $PackageConfig loclist $ns] } {
+	    Load $ns $locales
+	}
+    }
+    return $locales
+}
+
+# msgcat::Load --
+#
+#	Invoke message load callback and load message catalog files.
+#
+# Arguments:
+#	ns		Namespace (equal package) to load the message catalog.
+#	locales		List of locales to load.
+#	callbackonly	true if only callback should be invoked
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::Load {ns locales {callbackonly 0}} {
+    variable FileLocale
+    variable PackageConfig
+    variable LoadedLocals
+
+    if {0 == [llength $locales]} { return 0 }
+
+    # Invoke callback
+    Invoke loadcmd $locales $ns
+
+    if {$callbackonly || ![dict exists $PackageConfig mcfolder $ns]} {
+	return 0
+    }
+
+    # Invoke file load
+    set langdir [dict get $PackageConfig mcfolder $ns]
+
+    # Save the file locale if we are recursively called
+    if {[info exists FileLocale]} {
+	set nestedFileLocale $FileLocale
+    }
+    set x 0
+    foreach p $locales {
+	if {$p eq {}} {
+	    set p ROOT
+	}
+	set langfile [file join $langdir $p.msg]
+	if {[file exists $langfile]} {
+	    incr x
+	    set FileLocale [string tolower\
+		    [file tail [file rootname $langfile]]]
+	    if {"root" eq $FileLocale} {
+		set FileLocale ""
+	    }
+	    namespace inscope $ns [list ::source -encoding utf-8 $langfile]
+	    unset FileLocale
+	}
+    }
+    if {[info exists nestedFileLocale]} {
+	set FileLocale $nestedFileLocale
+    }
+    return $x
+}
+
+# msgcat::Invoke --
+#
+#	Invoke a set of registered callbacks.
+#	The callback is only invoked, if its registered namespace exists.
+#
+# Arguments:
+#	index		Index into PackageConfig to get callback command
+#	arglist		parameters to the callback invocation
+#	ns		(Optional) package to call.
+#			If not given or empty, check all registered packages.
+#	resultname	Variable to save the callback result of the last called
+#			callback to. May be set to "" to discard the result.
+#	failerror (0)	Fail on error if true. Otherwise call bgerror.
+#
+# Results:
+#	Possible values:
+#	- 0: no valid command registered
+#	- 1: registered command was the empty string
+#	- 2: registered command called, resultname is set
+#	- 3: registered command failed
+#	If multiple commands are called, the maximum of all results is returned.
+
+proc msgcat::Invoke {index arglist {ns ""} {resultname ""} {failerror 0}} {
+    variable PackageConfig
+    variable Config
+    if {"" ne $resultname} {
+	upvar 1 $resultname result
+    }
+    if {"" eq $ns} {
+	set packageList [dict keys [dict get $PackageConfig $index]]
+    } else {
+	set packageList [list $ns]
+    }
+    set ret 0
+    foreach ns $packageList {
+	if {[dict exists $PackageConfig $index $ns] && [namespace exists $ns]} {
+	    set cmd [dict get $PackageConfig $index $ns]
+	    if {"" eq $cmd} {
+		if {$ret == 0} {set ret 1}
+	    } else {
+		if {$failerror} {
+		    set result [namespace inscope $ns $cmd {*}$arglist]
+		    set ret 2
+		} elseif {1 == [catch {
+		    set result [namespace inscope $ns $cmd {*}$arglist]
+		    if {$ret < 2} {set ret 2}
+		} err derr]} {
+		    after idle [concat [::interp bgerror ""]\
+			    [list $err $derr]]
+		    set ret 3
+		}
+	    }
+	}
+    }
+    return $ret
+}
+
+# msgcat::mcset --
+#
+#	Set the translation for a given string in a specified locale.
+#
+# Arguments:
+#	locale		The locale to use.
+#	src		The source string.
+#	dest		(Optional) The translated string.  If omitted,
+#			the source string is used.
+#
+# Results:
+#	Returns the new locale.
+
+proc msgcat::mcset {locale src {dest ""}} {
+    variable Msgs
+    if {[llength [info level 0]] == 3} { ;# dest not specified
+	set dest $src
+    }
+
+    set ns [uplevel 1 [list ::namespace current]]
+
+    set locale [string tolower $locale]
+
+    dict set Msgs $ns $locale $src $dest
+    return $dest
+}
+
+# msgcat::mcflset --
+#
+#	Set the translation for a given string in the current file locale.
+#
+# Arguments:
+#	src		The source string.
+#	dest		(Optional) The translated string.  If omitted,
+#			the source string is used.
+#
+# Results:
+#	Returns the new locale.
+
+proc msgcat::mcflset {src {dest ""}} {
+    variable FileLocale
+    variable Msgs
+
+    if {![info exists FileLocale]} {
+	return -code error "must only be used inside a message catalog loaded\
+		with ::msgcat::mcload"
+    }
+    return [uplevel 1 [list [namespace origin mcset] $FileLocale $src $dest]]
+}
+
+# msgcat::mcmset --
+#
+#	Set the translation for multiple strings in a specified locale.
+#
+# Arguments:
+#	locale		The locale to use.
+#	pairs		One or more src/dest pairs (must be even length)
+#
+# Results:
+#	Returns the number of pairs processed
+
+proc msgcat::mcmset {locale pairs} {
+    variable Msgs
+
+    set length [llength $pairs]
+    if {$length % 2} {
+	return -code error "bad translation list:\
+		should be \"[lindex [info level 0] 0] locale {src dest ...}\""
+    }
+
+    set locale [string tolower $locale]
+    set ns [uplevel 1 [list ::namespace current]]
+
+    foreach {src dest} $pairs {
+	dict set Msgs $ns $locale $src $dest
+    }
+
+    return [expr {$length / 2}]
+}
+
+# msgcat::mcflmset --
+#
+#	Set the translation for multiple strings in the mc file locale.
+#
+# Arguments:
+#	pairs		One or more src/dest pairs (must be even length)
+#
+# Results:
+#	Returns the number of pairs processed
+
+proc msgcat::mcflmset {pairs} {
+    variable FileLocale
+    variable Msgs
+
+    if {![info exists FileLocale]} {
+	return -code error "must only be used inside a message catalog loaded\
+		with ::msgcat::mcload"
+    }
+    return [uplevel 1 [list [namespace origin mcmset] $FileLocale $pairs]]
+}
+
+# msgcat::mcunknown --
+#
+#	This routine is called by msgcat::mc if a translation cannot
+#	be found for a string and no unknowncmd is set for the current
+#	package. This routine is intended to be replaced
+#	by an application specific routine for error reporting
+#	purposes.  The default behavior is to return the source string.
+#	If additional args are specified, the format command will be used
+#	to work them into the traslated string.
+#
+# Arguments:
+#	locale		The current locale.
+#	src		The string to be translated.
+#	args		Args to pass to the format command
+#
+# Results:
+#	Returns the translated value.
+
+proc msgcat::mcunknown {args} {
+    return [uplevel 1 [list [namespace origin DefaultUnknown] {*}$args]]
+}
+
+# msgcat::DefaultUnknown --
+#
+#	This routine is called by msgcat::mc if a translation cannot
+#	be found for a string in the following circumstances:
+#	- Default global handler, if mcunknown is not redefined.
+#	- Per package handler, if the package sets unknowncmd to the empty
+#	  string.
+#	It returna the source string if the argument list is empty.
+#	If additional args are specified, the format command will be used
+#	to work them into the traslated string.
+#
+# Arguments:
+#	locale		(unused) The current locale.
+#	src		The string to be translated.
+#	args		Args to pass to the format command
+#
+# Results:
+#	Returns the translated value.
+
+proc msgcat::DefaultUnknown {locale src args} {
+    if {[llength $args]} {
+	return [format $src {*}$args]
+    } else {
+	return $src
+    }
+}
+
+# msgcat::mcmax --
+#
+#	Calculates the maximum length of the translated strings of the given
+#	list.
+#
+# Arguments:
+#	args	strings to translate.
+#
+# Results:
+#	Returns the length of the longest translated string.
+
+proc msgcat::mcmax {args} {
+    set max 0
+    foreach string $args {
+	set translated [uplevel 1 [list [namespace origin mc] $string]]
+	set len [string length $translated]
+	if {$len>$max} {
+	    set max $len
+	}
+    }
+    return $max
+}
+
+# Convert the locale values stored in environment variables to a form
+# suitable for passing to [mclocale]
+proc msgcat::ConvertLocale {value} {
+    # Assume $value is of form: $language[_$territory][.$codeset][@modifier]
+    # Convert to form: $language[_$territory][_$modifier]
+    #
+    # Comment out expanded RE version -- bugs alleged
+    # regexp -expanded {
+    #	^		# Match all the way to the beginning
+    #	([^_.@]*)	# Match "lanugage"; ends with _, ., or @
+    #	(_([^.@]*))?	# Match (optional) "territory"; starts with _
+    #	([.]([^@]*))?	# Match (optional) "codeset"; starts with .
+    #	(@(.*))?	# Match (optional) "modifier"; starts with @
+    #	$		# Match all the way to the end
+    # } $value -> language _ territory _ codeset _ modifier
+    if {![regexp {^([^_.@]+)(_([^.@]*))?([.]([^@]*))?(@(.*))?$} $value \
+	    -> language _ territory _ codeset _ modifier]} {
+	return -code error "invalid locale '$value': empty language part"
+    }
+    set ret $language
+    if {[string length $territory]} {
+	append ret _$territory
+    }
+    if {[string length $modifier]} {
+	append ret _$modifier
+    }
+    return $ret
+}
+
+# Initialize the default locale
+proc msgcat::Init {} {
+    global env
+
+    #
+    # set default locale, try to get from environment
+    #
+    foreach varName {LC_ALL LC_MESSAGES LANG} {
+	if {[info exists env($varName)] && ("" ne $env($varName))} {
+	    if {![catch {
+		mclocale [ConvertLocale $env($varName)]
+	    }]} {
+		return
+	    }
+	}
+    }
+    #
+    # On Darwin, fallback to current CFLocale identifier if available.
+    #
+    if {[info exists ::tcl::mac::locale] && $::tcl::mac::locale ne ""} {
+	if {![catch {
+	    mclocale [ConvertLocale $::tcl::mac::locale]
+	}]} {
+	    return
+	}
+    }
+    #
+    # The rest of this routine is special processing for Windows or
+    # Cygwin. All other platforms, get out now.
+    #
+    if {([info sharedlibextension] ne ".dll")
+	    || [catch {package require registry}]} {
+	mclocale C
+	return
+    }
+    #
+    # On Windows or Cygwin, try to set locale depending on registry
+    # settings, or fall back on locale of "C".
+    #
+
+    # On Vista and later:
+    # HCU/Control Panel/Desktop : PreferredUILanguages is for language packs,
+    # HCU/Control Pannel/International : localName is the default locale.
+    #
+    # They contain the local string as RFC5646, composed of:
+    # [a-z]{2,3} : language
+    # -[a-z]{4}  : script (optional, translated by table Latn->latin)
+    # -[a-z]{2}|[0-9]{3} : territory (optional, numerical region codes not used)
+    # (-.*)* : variant, extension, private use (optional, not used)
+    # Those are translated to local strings.
+    # Examples: de-CH -> de_ch, sr-Latn-CS -> sr_cs@latin, es-419 -> es
+    #
+    foreach key {{HKEY_CURRENT_USER\Control Panel\Desktop} {HKEY_CURRENT_USER\Control Panel\International}}\
+	    value {PreferredUILanguages localeName} {
+	if {![catch {registry get $key $value} localeName]
+		&& [regexp {^([a-z]{2,3})(?:-([a-z]{4}))?(?:-([a-z]{2}))?(?:-.+)?$}\
+		    [string tolower $localeName] match locale script territory]} {
+	    if {"" ne $territory} {
+		append locale _ $territory
+	    }
+	    set modifierDict [dict create latn latin cyrl cyrillic]
+	    if {[dict exists $modifierDict $script]} {
+		append locale @ [dict get $modifierDict $script]
+	    }
+	    if {![catch {mclocale [ConvertLocale $locale]}]} {
+		return
+	    }
+	}
+    }
+
+    # then check value locale which contains a numerical language ID
+    if {[catch {
+	set locale [registry get $key "locale"]
+    }]} {
+	mclocale C
+	return
+    }
+    #
+    # Keep trying to match against smaller and smaller suffixes
+    # of the registry value, since the latter hexadigits appear
+    # to determine general language and earlier hexadigits determine
+    # more precise information, such as territory.  For example,
+    #     0409 - English - United States
+    #     0809 - English - United Kingdom
+    # Add more translations to the WinRegToISO639 array above.
+    #
+    variable WinRegToISO639
+    set locale [string tolower $locale]
+    while {[string length $locale]} {
+	if {![catch {
+	    mclocale [ConvertLocale [dict get $WinRegToISO639 $locale]]
+	}]} {
+	    return
+	}
+	set locale [string range $locale 1 end]
+    }
+    #
+    # No translation known.  Fall back on "C" locale
+    #
+    mclocale C
+}
+msgcat::Init