Merge commit '55c7ed6e4d159cebe06999bf61e668284a89cd69' as 'tclxml'

1 files changed, 894 insertions, 0 deletions

diff --git a/tclxml/tools/genStubs.tcl b/tclxml/tools/genStubs.tcl
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+# genStubs.tcl --
+#
+#	This script generates a set of stub files for a given
+#	interface.  
+#	
+#
+# Copyright (c) 1998-1999 by Scriptics Corporation.
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+# 
+# RCS: @(#) $Id: genStubs.tcl,v 1.1.1.1 2009/01/16 22:11:49 joye Exp $
+
+namespace eval genStubs {
+    # libraryName --
+    #
+    #	The name of the entire library.  This value is used to compute
+    #	the USE_*_STUB_PROCS macro and the name of the init file.
+
+    variable libraryName "UNKNOWN"
+
+    # interfaces --
+    #
+    #	An array indexed by interface name that is used to maintain
+    #   the set of valid interfaces.  The value is empty.
+
+    array set interfaces {}
+
+    # curName --
+    #
+    #	The name of the interface currently being defined.
+
+    variable curName "UNKNOWN"
+
+    # hooks --
+    #
+    #	An array indexed by interface name that contains the set of
+    #	subinterfaces that should be defined for a given interface.
+
+    array set hooks {}
+
+    # stubs --
+    #
+    #	This three dimensional array is indexed first by interface name,
+    #	second by platform name, and third by a numeric offset or the
+    #	constant "lastNum".  The lastNum entry contains the largest
+    #	numeric offset used for a given interface/platform combo.  Each
+    #	numeric offset contains the C function specification that
+    #	should be used for the given entry in the stub table.  The spec
+    #	consists of a list in the form returned by parseDecl.
+
+    array set stubs {}
+
+    # outDir --
+    #
+    #	The directory where the generated files should be placed.
+
+    variable outDir .
+}
+
+# genStubs::library --
+#
+#	This function is used in the declarations file to set the name
+#	of the library that the interfaces are associated with (e.g. "tcl").
+#	This value will be used to define the inline conditional macro.
+#
+# Arguments:
+#	name	The library name.
+#
+# Results:
+#	None.
+
+proc genStubs::library {name} {
+    variable libraryName $name
+}
+
+# genStubs::interface --
+#
+#	This function is used in the declarations file to set the name
+#	of the interface currently being defined.
+#
+# Arguments:
+#	name	The name of the interface.
+#
+# Results:
+#	None.
+
+proc genStubs::interface {name} {
+    variable curName $name
+    variable interfaces
+
+    set interfaces($name) {}
+    return
+}
+
+# genStubs::hooks --
+#
+#	This function defines the subinterface hooks for the current
+#	interface.
+#
+# Arguments:
+#	names	The ordered list of interfaces that are reachable through the
+#		hook vector.
+#
+# Results:
+#	None.
+
+proc genStubs::hooks {names} {
+    variable curName
+    variable hooks
+
+    set hooks($curName) $names
+    return
+}
+
+# genStubs::declare --
+#
+#	This function is used in the declarations file to declare a new
+#	interface entry.
+#
+# Arguments:
+#	index		The index number of the interface.
+#	platform	The platform the interface belongs to.  Should be one
+#			of generic, win, unix, or mac.
+#	decl		The C function declaration, or {} for an undefined
+#			entry.
+#
+# Results:
+#	None.
+
+proc genStubs::declare {args} {
+    variable stubs
+    variable curName
+
+    if {[llength $args] != 3} {
+	puts stderr "wrong # args: declare $args"
+    }
+    lassign $args index platformList decl
+
+    # Check for duplicate declarations, then add the declaration and
+    # bump the lastNum counter if necessary.
+
+    foreach platform $platformList {
+	if {[info exists stubs($curName,$platform,$index)]} {
+	    puts stderr "Duplicate entry: declare $args"
+	}
+    }
+    regsub -all "\[ \t\n\]+" [string trim $decl] " " decl
+    set decl [parseDecl $decl]
+
+    foreach platform $platformList {
+	if {$decl != ""} {
+	    set stubs($curName,$platform,$index) $decl
+	    if {![info exists stubs($curName,$platform,lastNum)] \
+		    || ($index > $stubs($curName,$platform,lastNum))} {
+		set stubs($curName,$platform,lastNum) $index
+	    }
+	}
+    }
+    return
+}
+
+# genStubs::rewriteFile --
+#
+#	This function replaces the machine generated portion of the
+#	specified file with new contents.  It looks for the !BEGIN! and
+#	!END! comments to determine where to place the new text.
+#
+# Arguments:
+#	file	The name of the file to modify.
+#	text	The new text to place in the file.
+#
+# Results:
+#	None.
+
+proc genStubs::rewriteFile {file text} {
+    if {![file exist $file]} {
+	puts stderr "Cannot find file: $file"
+	return
+    }
+    set in [open ${file} r]
+    set out [open ${file}.new w]
+
+    # Always write out the file with LF termination
+    fconfigure $out -translation lf
+
+    while {![eof $in]} {
+	set line [gets $in]
+	if {[regexp {!BEGIN!} $line]} {
+	    break
+	}
+	puts $out $line
+    }
+    puts $out "/* !BEGIN!: Do not edit below this line. */"
+    puts $out $text
+    while {![eof $in]} {
+	set line [gets $in]
+	if {[regexp {!END!} $line]} {
+	    break
+	}
+    }
+    puts $out "/* !END!: Do not edit above this line. */"
+    puts -nonewline $out [read $in]
+    close $in
+    close $out
+    file rename -force ${file}.new ${file}
+    return
+}
+
+# genStubs::addPlatformGuard --
+#
+#	Wrap a string inside a platform #ifdef.
+#
+# Arguments:
+#	plat	Platform to test.
+#
+# Results:
+#	Returns the original text inside an appropriate #ifdef.
+
+proc genStubs::addPlatformGuard {plat text} {
+    switch $plat {
+	win {
+	    return "#ifdef __WIN32__\n${text}#endif /* __WIN32__ */\n"
+	}
+	unix {
+	    return "#if !defined(__WIN32__) && !defined(MAC_TCL) /* UNIX */\n${text}#endif /* UNIX */\n"
+	}		    
+	mac {
+	    return "#ifdef MAC_TCL\n${text}#endif /* MAC_TCL */\n"
+	}
+    }
+    return "$text"
+}
+
+# genStubs::emitSlots --
+#
+#	Generate the stub table slots for the given interface.  If there
+#	are no generic slots, then one table is generated for each
+#	platform, otherwise one table is generated for all platforms.
+#
+# Arguments:
+#	name	The name of the interface being emitted.
+#	textVar	The variable to use for output.
+#
+# Results:
+#	None.
+
+proc genStubs::emitSlots {name textVar} {
+    variable stubs
+    upvar $textVar text
+
+    forAllStubs $name makeSlot 1 text {"    void *reserved$i;\n"}
+    return
+}
+
+# genStubs::parseDecl --
+#
+#	Parse a C function declaration into its component parts.
+#
+# Arguments:
+#	decl	The function declaration.
+#
+# Results:
+#	Returns a list of the form {returnType name args}.  The args
+#	element consists of a list of type/name pairs, or a single
+#	element "void".  If the function declaration is malformed
+#	then an error is displayed and the return value is {}.
+
+proc genStubs::parseDecl {decl} {
+    if {![regexp {^(.*)\((.*)\)$} $decl all prefix args]} {
+	puts stderr "Malformed declaration: $decl"
+	return
+    }
+    set prefix [string trim $prefix]
+    if {![regexp {^(.+[ ][*]*)([^ *]+)$} $prefix all rtype fname]} {
+	puts stderr "Bad return type: $decl"
+	return
+    }
+    set rtype [string trim $rtype]
+    foreach arg [split $args ,] {
+	lappend argList [string trim $arg]
+    }
+    if {![string compare [lindex $argList end] "..."]} {
+	if {[llength $argList] != 2} {
+	    puts stderr "Only one argument is allowed in varargs form: $decl"
+	}
+	set arg [parseArg [lindex $argList 0]]
+	if {$arg == "" || ([llength $arg] != 2)} {
+	    puts stderr "Bad argument: '[lindex $argList 0]' in '$decl'"
+	    return
+	}
+	set args [list TCL_VARARGS $arg]
+    } else {
+	set args {}
+	foreach arg $argList {
+	    set argInfo [parseArg $arg]
+	    if {![string compare $argInfo "void"]} {
+		lappend args "void"
+		break
+	    } elseif {[llength $argInfo] == 2 || [llength $argInfo] == 3} {
+		lappend args $argInfo
+	    } else {
+		puts stderr "Bad argument: '$arg' in '$decl'"
+		return
+	    }
+	}
+    }
+    return [list $rtype $fname $args]
+}
+
+# genStubs::parseArg --
+#
+#	This function parses a function argument into a type and name.
+#
+# Arguments:
+#	arg	The argument to parse.
+#
+# Results:
+#	Returns a list of type and name with an optional third array
+#	indicator.  If the argument is malformed, returns "".
+
+proc genStubs::parseArg {arg} {
+    if {![regexp {^(.+[ ][*]*)([^][ *]+)(\[\])?$} $arg all type name array]} {
+	if {$arg == "void"} {
+	    return $arg
+	} else {
+	    return
+	}
+    }
+    set result [list [string trim $type] $name]
+    if {$array != ""} {
+	lappend result $array
+    }
+    return $result
+}
+
+# genStubs::makeDecl --
+#
+#	Generate the prototype for a function.
+#
+# Arguments:
+#	name	The interface name.
+#	decl	The function declaration.
+#	index	The slot index for this function.
+#
+# Results:
+#	Returns the formatted declaration string.
+
+proc genStubs::makeDecl {name decl index} {
+    lassign $decl rtype fname args
+
+    append text "/* $index */\n"
+    set line "EXTERN $rtype"
+    set count [expr {2 - ([string length $line] / 8)}]
+    append line [string range "\t\t\t" 0 $count]
+    set pad [expr {24 - [string length $line]}]
+    if {$pad <= 0} {
+	append line " "
+	set pad 0
+    }
+    append line "$fname _ANSI_ARGS_("
+
+    set arg1 [lindex $args 0]
+    switch -exact $arg1 {
+	void {
+	    append line "(void)"
+	}
+	TCL_VARARGS {
+	    set arg [lindex $args 1]
+	    append line "TCL_VARARGS([lindex $arg 0],[lindex $arg 1])"
+	}
+	default {
+	    set sep "("
+	    foreach arg $args {
+		append line $sep
+		set next {}
+		append next [lindex $arg 0] " " [lindex $arg 1] \
+			[lindex $arg 2]
+		if {[string length $line] + [string length $next] \
+			+ $pad > 76} {
+		    append text $line \n
+		    set line "\t\t\t\t"
+		    set pad 28
+		}
+		append line $next
+		set sep ", "
+	    }
+	    append line ")"
+	}
+    }
+    append text $line
+    
+    append text ");\n"
+    return $text
+}
+
+# genStubs::makeMacro --
+#
+#	Generate the inline macro for a function.
+#
+# Arguments:
+#	name	The interface name.
+#	decl	The function declaration.
+#	index	The slot index for this function.
+#
+# Results:
+#	Returns the formatted macro definition.
+
+proc genStubs::makeMacro {name decl index} {
+    lassign $decl rtype fname args
+
+    set lfname [string tolower [string index $fname 0]]
+    append lfname [string range $fname 1 end]
+
+    set text "#ifndef $fname\n#define $fname"
+    set arg1 [lindex $args 0]
+    set argList ""
+    switch -exact $arg1 {
+	void {
+	    set argList "()"
+	}
+	TCL_VARARGS {
+	}
+	default {
+	    set sep "("
+	    foreach arg $args {
+		append argList $sep [lindex $arg 1]
+		set sep ", "
+	    }
+	    append argList ")"
+	}
+    }
+    append text " \\\n\t(${name}StubsPtr->$lfname)"
+    append text " /* $index */\n#endif\n"
+    return $text
+}
+
+# genStubs::makeStub --
+#
+#	Emits a stub function definition.
+#
+# Arguments:
+#	name	The interface name.
+#	decl	The function declaration.
+#	index	The slot index for this function.
+#
+# Results:
+#	Returns the formatted stub function definition.
+
+proc genStubs::makeStub {name decl index} {
+    lassign $decl rtype fname args
+
+    set lfname [string tolower [string index $fname 0]]
+    append lfname [string range $fname 1 end]
+
+    append text "/* Slot $index */\n" $rtype "\n" $fname
+
+    set arg1 [lindex $args 0]
+
+    if {![string compare $arg1 "TCL_VARARGS"]} {
+	lassign [lindex $args 1] type argName 
+	append text " TCL_VARARGS_DEF($type,$argName)\n\{\n"
+	append text "    " $type " var;\n    va_list argList;\n"
+	if {[string compare $rtype "void"]} {
+	    append text "    " $rtype " resultValue;\n"
+	}
+	append text "\n    var = (" $type ") TCL_VARARGS_START(" \
+		$type "," $argName ",argList);\n\n    "
+	if {[string compare $rtype "void"]} {
+	    append text "resultValue = "
+	}
+	append text "(" $name "StubsPtr->" $lfname "VA)(var, argList);\n"
+	append text "    va_end(argList);\n"
+	if {[string compare $rtype "void"]} {
+	    append text "return resultValue;\n"
+	}
+	append text "\}\n\n"
+	return $text
+    }
+
+    if {![string compare $arg1 "void"]} {
+	set argList "()"
+	set argDecls ""
+    } else {
+	set argList ""
+	set sep "("
+	foreach arg $args {
+	    append argList $sep [lindex $arg 1]
+	    append argDecls "    " [lindex $arg 0] " " \
+		    [lindex $arg 1] [lindex $arg 2] ";\n"
+	    set sep ", "
+	}
+	append argList ")"
+    }
+    append text $argList "\n" $argDecls "{\n    "
+    if {[string compare $rtype "void"]} {
+	append text "return "
+    }
+    append text "(" $name "StubsPtr->" $lfname ")" $argList ";\n}\n\n"
+    return $text
+}
+
+# genStubs::makeSlot --
+#
+#	Generate the stub table entry for a function.
+#
+# Arguments:
+#	name	The interface name.
+#	decl	The function declaration.
+#	index	The slot index for this function.
+#
+# Results:
+#	Returns the formatted table entry.
+
+proc genStubs::makeSlot {name decl index} {
+    lassign $decl rtype fname args
+
+    set lfname [string tolower [string index $fname 0]]
+    append lfname [string range $fname 1 end]
+
+    set text "    "
+    append text $rtype " (*" $lfname ") _ANSI_ARGS_("
+
+    set arg1 [lindex $args 0]
+    switch -exact $arg1 {
+	void {
+	    append text "(void)"
+	}
+	TCL_VARARGS {
+	    set arg [lindex $args 1]
+	    append text "TCL_VARARGS([lindex $arg 0],[lindex $arg 1])"
+	}
+	default {
+	    set sep "("
+	    foreach arg $args {
+		append text $sep [lindex $arg 0] " " [lindex $arg 1] \
+			[lindex $arg 2]
+		set sep ", "
+	    }
+	    append text ")"
+	}
+    }
+    
+    append text "); /* $index */\n"
+    return $text
+}
+
+# genStubs::makeInit --
+#
+#	Generate the prototype for a function.
+#
+# Arguments:
+#	name	The interface name.
+#	decl	The function declaration.
+#	index	The slot index for this function.
+#
+# Results:
+#	Returns the formatted declaration string.
+
+proc genStubs::makeInit {name decl index} {
+    append text "    " [lindex $decl 1] ", /* " $index " */\n"
+    return $text
+}
+
+# genStubs::forAllStubs --
+#
+#	This function iterates over all of the platforms and invokes
+#	a callback for each slot.  The result of the callback is then
+#	placed inside appropriate platform guards.
+#
+# Arguments:
+#	name		The interface name.
+#	slotProc	The proc to invoke to handle the slot.  It will
+#			have the interface name, the declaration,  and
+#			the index appended.
+#	onAll		If 1, emit the skip string even if there are
+#			definitions for one or more platforms.
+#	textVar		The variable to use for output.
+#	skipString	The string to emit if a slot is skipped.  This
+#			string will be subst'ed in the loop so "$i" can
+#			be used to substitute the index value.
+#
+# Results:
+#	None.
+
+proc genStubs::forAllStubs {name slotProc onAll textVar \
+	{skipString {"/* Slot $i is reserved */\n"}}} {
+    variable stubs
+    upvar $textVar text
+
+    set plats [array names stubs $name,*,lastNum]
+    if {[info exists stubs($name,generic,lastNum)]} {
+	# Emit integrated stubs block
+	set lastNum -1
+	foreach plat [array names stubs $name,*,lastNum] {
+	    if {$stubs($plat) > $lastNum} {
+		set lastNum $stubs($plat)
+	    }
+	}
+	for {set i 0} {$i <= $lastNum} {incr i} {
+	    set slots [array names stubs $name,*,$i]
+	    set emit 0
+	    if {[info exists stubs($name,generic,$i)]} {
+		if {[llength $slots] > 1} {
+		    puts stderr "platform entry duplicates generic entry: $i"
+		}
+		append text [$slotProc $name $stubs($name,generic,$i) $i]
+		set emit 1
+	    } elseif {[llength $slots] > 0} {
+		foreach plat {unix win mac} {
+		    if {[info exists stubs($name,$plat,$i)]} {
+			append text [addPlatformGuard $plat \
+				[$slotProc $name $stubs($name,$plat,$i) $i]]
+			set emit 1
+		    } elseif {$onAll} {
+			append text [eval {addPlatformGuard $plat} $skipString]
+			set emit 1
+		    }
+		}
+	    }
+	    if {$emit == 0} {
+		eval {append text} $skipString
+	    }
+	}
+	
+    } else {
+	# Emit separate stubs blocks per platform
+	foreach plat {unix win mac} {
+	    if {[info exists stubs($name,$plat,lastNum)]} {
+		set lastNum $stubs($name,$plat,lastNum)
+		set temp {}
+		for {set i 0} {$i <= $lastNum} {incr i} {
+		    if {![info exists stubs($name,$plat,$i)]} {
+			eval {append temp} $skipString
+		    } else {
+			append temp [$slotProc $name $stubs($name,$plat,$i) $i]
+		    }
+		}
+		append text [addPlatformGuard $plat $temp]
+	    }
+	}
+    }
+
+}
+
+# genStubs::emitDeclarations --
+#
+#	This function emits the function declarations for this interface.
+#
+# Arguments:
+#	name	The interface name.
+#	textVar	The variable to use for output.
+#
+# Results:
+#	None.
+
+proc genStubs::emitDeclarations {name textVar} {
+    variable stubs
+    upvar $textVar text
+
+    append text "\n/*\n * Exported function declarations:\n */\n\n"
+    forAllStubs $name makeDecl 0 text
+    return
+}
+
+# genStubs::emitMacros --
+#
+#	This function emits the inline macros for an interface.
+#
+# Arguments:
+#	name	The name of the interface being emitted.
+#	textVar	The variable to use for output.
+#
+# Results:
+#	None.
+
+proc genStubs::emitMacros {name textVar} {
+    variable stubs
+    variable libraryName
+    upvar $textVar text
+
+    set upName [string toupper $libraryName]
+    append text "\n#if defined(USE_${upName}_STUBS) && !defined(USE_${upName}_STUB_PROCS)\n"
+    append text "\n/*\n * Inline function declarations:\n */\n\n"
+    
+    forAllStubs $name makeMacro 0 text
+
+    append text "\n#endif /* defined(USE_${upName}_STUBS) && !defined(USE_${upName}_STUB_PROCS) */\n"
+    return
+}
+
+# genStubs::emitHeader --
+#
+#	This function emits the body of the <name>Decls.h file for
+#	the specified interface.
+#
+# Arguments:
+#	name	The name of the interface being emitted.
+#
+# Results:
+#	None.
+
+proc genStubs::emitHeader {name} {
+    variable outDir
+    variable hooks
+
+    set capName [string toupper [string index $name 0]]
+    append capName [string range $name 1 end]
+
+    emitDeclarations $name text
+
+    if {[info exists hooks($name)]} {
+	append text "\ntypedef struct ${capName}StubHooks {\n"
+	foreach hook $hooks($name) {
+	    set capHook [string toupper [string index $hook 0]]
+	    append capHook [string range $hook 1 end]
+	    append text "    struct ${capHook}Stubs *${hook}Stubs;\n"
+	}
+	append text "} ${capName}StubHooks;\n"
+    }
+    append text "\ntypedef struct ${capName}Stubs {\n"
+    append text "    int magic;\n"
+    append text "    struct ${capName}StubHooks *hooks;\n\n"
+
+    emitSlots $name text
+
+    append text "} ${capName}Stubs;\n"
+
+    append text "\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n"
+    append text "extern ${capName}Stubs *${name}StubsPtr;\n"
+    append text "#ifdef __cplusplus\n}\n#endif\n"
+
+    emitMacros $name text
+
+    rewriteFile [file join $outDir ${name}Decls.h] $text
+    return
+}
+
+# genStubs::emitStubs --
+#
+#	This function emits the body of the <name>Stubs.c file for
+#	the specified interface.
+#
+# Arguments:
+#	name	The name of the interface being emitted.
+#
+# Results:
+#	None.
+
+proc genStubs::emitStubs {name} {
+    variable outDir
+
+    append text "\n/*\n * Exported stub functions:\n */\n\n"
+    forAllStubs $name makeStub 0 text
+
+    rewriteFile [file join $outDir ${name}Stubs.c] $text
+    return    
+}
+
+# genStubs::emitInit --
+#
+#	Generate the table initializers for an interface.
+#
+# Arguments:
+#	name		The name of the interface to initialize.
+#	textVar		The variable to use for output.
+#
+# Results:
+#	Returns the formatted output.
+
+proc genStubs::emitInit {name textVar} {
+    variable stubs
+    variable hooks
+    upvar $textVar text
+
+    set capName [string toupper [string index $name 0]]
+    append capName [string range $name 1 end]
+
+    if {[info exists hooks($name)]} {
+ 	append text "\nstatic ${capName}StubHooks ${name}StubHooks = \{\n"
+	set sep "    "
+	foreach sub $hooks($name) {
+	    append text $sep "&${sub}Stubs"
+	    set sep ",\n    "
+	}
+	append text "\n\};\n"
+    }
+    append text "\n${capName}Stubs ${name}Stubs = \{\n"
+    append text "    TCL_STUB_MAGIC,\n"
+    if {[info exists hooks($name)]} {
+	append text "    &${name}StubHooks,\n"
+    } else {
+	append text "    NULL,\n"
+    }
+    
+    forAllStubs $name makeInit 1 text {"    NULL, /* $i */\n"}
+
+    append text "\};\n"
+    return
+}
+
+# genStubs::emitInits --
+#
+#	This function emits the body of the <name>StubInit.c file for
+#	the specified interface.
+#
+# Arguments:
+#	name	The name of the interface being emitted.
+#
+# Results:
+#	None.
+
+proc genStubs::emitInits {} {
+    variable hooks
+    variable outDir
+    variable libraryName
+    variable interfaces
+
+    # Assuming that dependencies only go one level deep, we need to emit
+    # all of the leaves first to avoid needing forward declarations.
+
+    set leaves {}
+    set roots {}
+    foreach name [lsort [array names interfaces]] {
+	if {[info exists hooks($name)]} {
+	    lappend roots $name
+	} else {
+	    lappend leaves $name
+	}
+    }
+    foreach name $leaves {
+	emitInit $name text
+    }
+    foreach name $roots {
+	emitInit $name text
+    }
+
+    rewriteFile [file join $outDir ${libraryName}StubInit.c] $text
+}
+
+# genStubs::init --
+#
+#	This is the main entry point.
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	None.
+
+proc genStubs::init {} {
+    global argv argv0
+    variable outDir
+    variable interfaces
+
+    if {[llength $argv] < 2} {
+	puts stderr "usage: $argv0 outDir declFile ?declFile...?"
+	exit 1
+    }
+
+    set outDir [lindex $argv 0]
+
+    foreach file [lrange $argv 1 end] {
+	source $file
+    }
+
+    foreach name [lsort [array names interfaces]] {
+	puts "Emitting $name"
+	emitHeader $name
+    }
+
+    emitInits
+}
+
+# lassign --
+#
+#	This function emulates the TclX lassign command.
+#
+# Arguments:
+#	valueList	A list containing the values to be assigned.
+#	args		The list of variables to be assigned.
+#
+# Results:
+#	Returns any values that were not assigned to variables.
+
+proc lassign {valueList args} {
+  if {[llength $args] == 0} {
+      error "wrong # args: lassign list varname ?varname..?"
+  }
+
+  uplevel [list foreach $args $valueList {break}]
+  return [lrange $valueList [llength $args] end]
+}
+
+genStubs::init