File: genStubs.tcl

package info (click to toggle)
tdbc 1.1.1-1
  • links: PTS
  • area: main
  • in suites: bullseye
  • size: 928 kB
  • sloc: sh: 2,256; tcl: 1,146; ansic: 886; makefile: 61
file content (875 lines) | stat: -rw-r--r-- 20,669 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
# 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.
# 
# $Id: genStubs.tcl,v 1.1 2007/05/18 13:35:56 dkf Exp $
#
# SOURCE: tcl/tools/genStubs.tcl, revision 1.17
#
# CHANGES: 
#	+ Don't use _ANSI_ARGS_ macro
#	+ Remove xxx_TCL_DECLARED #ifdeffery
#	+ Use application-defined storage class specifier instead of "EXTERN"
#	+ Add "epoch" and "revision" fields to stubs table record
#	+ Remove dead code related to USE_*_STUB_PROCS (emitStubs, makeStub)
#	+ Second argument to "declare" is used as a status guard
#	  instead of a platform guard.
#	+ Use void (*reserved$i)(void) = 0 instead of void *reserved$i = NULL
#	  for unused stub entries, in case pointer-to-function and 
#	  pointer-to-object are different sizes.
#	+ Allow trailing semicolon in function declarations
#	+ stubs table is const-qualified
#

package require Tcl 8

namespace eval genStubs {
    # libraryName --
    #
    #	The name of the entire library.  This value is used to compute
    #	the USE_*_STUBS macro, the name of the init file, and others.

    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"

    # scspec --
    #
    #	Storage class specifier for external function declarations.
    #	Normally "extern", may be set to something like XYZAPI
    #
    variable scspec "extern"

    # epoch, revision --
    #
    #	The epoch and revision numbers of the interface currently being defined.
    #   (@@@TODO: should be an array mapping interface names -> numbers)
    #

    variable epoch 0
    variable revision 0

    # 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 field name, and third by a numeric offset or the
    #	constant "lastNum".  The lastNum entry contains the largest
    #	numeric offset used for a given interface.
    #
    #	Field "decl,$i" 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.
    #   Other fields TBD later.

    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
    variable stubs

    set interfaces($name) {}
    set stubs($name,lastNum) 0
    return
}

# genStubs::scspec --
#
#	Define the storage class macro used for external function declarations.
#	Typically, this will be a macro like XYZAPI or EXTERN that
#	expands to either DLLIMPORT or DLLEXPORT, depending on whether
#	-DBUILD_XYZ has been set.
#
proc genStubs::scspec {value} {
    variable scspec $value
}

# genStubs::epoch --
#
#	Define the epoch number for this library.  The epoch
#	should be incrememented when a release is made that
#	contains incompatible changes to the public API.
#
proc genStubs::epoch {value} {
    variable epoch $value
}

# 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.
#	status  	Status of the interface: one of "current",
#		  	"deprecated", or "obsolete".
#	decl		The C function declaration, or {} for an undefined
#			entry.
#
proc genStubs::declare {index status decl} {
    variable stubs
    variable curName
    variable revision

    incr revision

    # Check for duplicate declarations, then add the declaration and
    # bump the lastNum counter if necessary.

    if {[info exists stubs($curName,decl,$index)]} {
	puts stderr "Duplicate entry: $index"
    }
    regsub -all "\[ \t\n\]+" [string trim $decl] " " decl
    set decl [parseDecl $decl]

    set stubs($curName,status,$index) $status
    set stubs($curName,decl,$index) $decl

    if {$index > $stubs($curName,lastNum)} {
	set stubs($curName,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 exists $file]} {
	puts stderr "Cannot find file: $file"
	return
    }
    set in [open ${file} r]
    set out [open ${file}.new w]
    fconfigure $out -translation lf

    while {![eof $in]} {
	set line [gets $in]
	if {[string match "*!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 {[string match "*!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) /* UNIX */\n${text}#endif /* UNIX */\n"
	}		    
	macosx {
	    return "#ifdef MAC_OSX_TCL\n${text}#endif /* MAC_OSX_TCL */\n"
	}
	aqua {
	    return "#ifdef MAC_OSX_TK\n${text}#endif /* MAC_OSX_TK */\n"
	}
	x11 {
	    return "#if !(defined(_WIN32) || defined(MAC_OSX_TK)) /* X11 */\n${text}#endif /* X11 */\n"
	}
    }
    return "$text"
}

# genStubs::emitSlots --
#
#	Generate the stub table slots for the given interface.
#
# Arguments:
#	name	The name of the interface being emitted.
#	textVar	The variable to use for output.
#
# Results:
#	None.

proc genStubs::emitSlots {name textVar} {
    upvar $textVar text

    forAllStubs $name makeSlot noGuard text {"    void (*reserved$i)(void);\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} {
    variable scspec
    lassign $decl rtype fname args

    append text "/* $index */\n"
    set line "$scspec $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 "

    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 [string trimright $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 "#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"
    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 ") "

    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 slots and invokes
#	a callback for each slot.  The result of the callback is then
#	placed inside appropriate 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.
#	guardProc	The proc to invoke to add guards.  It will have
#		        the slot status and text appended.
#	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 guardProc textVar 
    	{skipString {"/* Slot $i is reserved */\n"}}} {
    variable stubs
    upvar $textVar text

    set lastNum $stubs($name,lastNum)

    for {set i 0} {$i <= $lastNum} {incr i} {
	if {[info exists stubs($name,decl,$i)]} {
	    append text [$guardProc $stubs($name,status,$i) \
	    			[$slotProc $name $stubs($name,decl,$i) $i]]
	} else {
	    eval {append text} $skipString
	}
    }
}

proc genStubs::noGuard  {status text} { return $text }

proc genStubs::addGuard {status text} {
    variable libraryName
    set upName [string toupper $libraryName]

    switch -- $status {
	current	{ 
	    # No change
	}
	deprecated {
	    set text [ifdeffed "${upName}_DEPRECATED" $text]
	}
	obsolete {
	    set text ""
	}
	default {
	    puts stderr "Unrecognized status code $status"
	}
    }
    return $text 
}

proc genStubs::ifdeffed {macro text} {
    join [list "#ifdef $macro" $text "#endif" ""] \n
}

# 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} {
    upvar $textVar text

    append text "\n/*\n * Exported function declarations:\n */\n\n"
    forAllStubs $name makeDecl noGuard 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 libraryName
    upvar $textVar text

    set upName [string toupper $libraryName]
    append text "\n#if defined(USE_${upName}_STUBS)\n"
    append text "\n/*\n * Inline function declarations:\n */\n\n"

    forAllStubs $name makeMacro addGuard text

    append text "\n#endif /* defined(USE_${upName}_STUBS) */\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
    variable epoch
    variable revision

    set capName [string toupper [string index $name 0]]
    append capName [string range $name 1 end]

    set CAPName [string toupper $name]
    append text "\n"
    append text "#define ${CAPName}_STUBS_EPOCH $epoch\n"
    append text "#define ${CAPName}_STUBS_REVISION $revision\n"

    append text "\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n"

    emitDeclarations $name text

    if {[info exists hooks($name)]} {
	append text "\ntypedef struct {\n"
	foreach hook $hooks($name) {
	    set capHook [string toupper [string index $hook 0]]
	    append capHook [string range $hook 1 end]
	    append text "    const struct ${capHook}Stubs *${hook}Stubs;\n"
	}
	append text "} ${capName}StubHooks;\n"
    }
    append text "\ntypedef struct ${capName}Stubs {\n"
    append text "    int magic;\n"
    append text "    int epoch;\n"
    append text "    int revision;\n"
    if {[info exists hooks($name)]} {
	append text "    const ${capName}StubHooks *hooks;\n\n"
    } else {
	append text "    void *hooks;\n\n"
    }

    emitSlots $name text

    append text "} ${capName}Stubs;\n\n"

    append text "extern const ${capName}Stubs *${name}StubsPtr;\n\n"
    append text "#ifdef __cplusplus\n}\n#endif\n"

    emitMacros $name text

    rewriteFile [file join $outDir ${name}Decls.h] $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 hooks
    variable interfaces
    variable epoch
    upvar $textVar text
    set root 1

    set capName [string toupper [string index $name 0]]
    append capName [string range $name 1 end]
    set CAPName [string toupper $name]

    if {[info exists hooks($name)]} {
	append text "\nstatic const ${capName}StubHooks ${name}StubHooks = \{\n"
	set sep "    "
	foreach sub $hooks($name) {
	    append text $sep "&${sub}Stubs"
	    set sep ",\n    "
	}
	append text "\n\};\n"
    }
    foreach intf [array names interfaces] {
	if {[info exists hooks($intf)]} {
	    if {[lsearch -exact $hooks($intf) $name] >= 0} {
		set root 0
		break
	    }
	}
    }

    append text "\n"
    if {!$root} {
	append text "static "
    }
    append text "const ${capName}Stubs ${name}Stubs = \{\n"
    append text "    TCL_STUB_MAGIC,\n"
    append text "    ${CAPName}_STUBS_EPOCH,\n"
    append text "    ${CAPName}_STUBS_REVISION,\n"
    if {[info exists hooks($name)]} {
	append text "    &${name}StubHooks,\n"
    } else {
	append text "    0,\n"
    }

    forAllStubs $name makeInit noGuard text {"    0, /* $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