Output BEGIN/END_INTERFACE for C++ base classes too.
[wine] / tools / winapi_check / winapi_parser.pm
1 #
2 # Copyright 1999, 2000, 2001 Patrik Stridvall
3 #
4 # This library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
8 #
9 # This library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 # Lesser General Public License for more details.
13 #
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with this library; if not, write to the Free Software
16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17 #
18
19 package winapi_parser;
20
21 use strict;
22
23 use output qw($output);
24 use options qw($options);
25
26 sub parse_c_file {
27     my $file = shift;
28     my $callbacks = shift;
29
30     my $empty_callback = sub { };
31
32     my $c_comment_found_callback = $$callbacks{c_comment_found} || $empty_callback;
33     my $cplusplus_comment_found_callback = $$callbacks{cplusplus_comment_found} || $empty_callback;
34     my $function_create_callback = $$callbacks{function_create} || $empty_callback;
35     my $function_found_callback = $$callbacks{function_found} || $empty_callback;
36     my $type_create_callback = $$callbacks{type_create} || $empty_callback;
37     my $type_found_callback = $$callbacks{type_found} || $empty_callback;
38     my $preprocessor_found_callback = $$callbacks{preprocessor_found} || $empty_callback;
39
40     # global
41     my $debug_channels = [];
42
43     my $in_function = 0;
44     my $function_begin;
45     my $function_end;
46     {
47         my $documentation_line;
48         my $documentation;
49         my $function_line;
50         my $linkage;
51         my $return_type;
52         my $calling_convention;
53         my $internal_name = "";
54         my $argument_types;
55         my $argument_names;
56         my $argument_documentations;
57         my $statements_line;
58         my $statements;
59
60         $function_begin = sub {
61             $documentation_line = shift;
62             $documentation = shift;
63             $function_line = shift;
64             $linkage = shift;
65             $return_type= shift;
66             $calling_convention = shift;
67             $internal_name = shift;
68             $argument_types = shift;
69             $argument_names = shift;
70             $argument_documentations = shift;
71
72             if(defined($argument_names) && defined($argument_types) &&
73                $#$argument_names == -1)
74             {
75                 foreach my $n (0..$#$argument_types) {
76                     push @$argument_names, "";
77                 }
78             }
79
80             if(defined($argument_documentations) &&
81                $#$argument_documentations == -1)
82             {
83                 foreach my $n (0..$#$argument_documentations) {
84                     push @$argument_documentations, "";
85                 }
86             }
87
88             $in_function = 1;
89         };
90
91         $function_end = sub {
92             $statements_line = shift;
93             $statements = shift;
94
95             my $function = &$function_create_callback();
96
97             if(!defined($documentation_line)) {
98                 $documentation_line = 0;
99             }
100
101             $function->file($file);
102             $function->debug_channels([@$debug_channels]);
103             $function->documentation_line($documentation_line);
104             $function->documentation($documentation);
105             $function->function_line($function_line);
106             $function->linkage($linkage);
107             $function->return_type($return_type);
108             $function->calling_convention($calling_convention);
109             $function->internal_name($internal_name);
110             if(defined($argument_types)) {
111                 $function->argument_types([@$argument_types]);
112             }
113             if(defined($argument_names)) {
114                 $function->argument_names([@$argument_names]);
115             }
116             if(defined($argument_documentations)) {
117                 $function->argument_documentations([@$argument_documentations]);
118             }
119             $function->statements_line($statements_line);
120             $function->statements($statements);
121
122             &$function_found_callback($function);
123
124             $in_function = 0;
125         };
126     }
127
128     my $in_type = 0;
129     my $type_begin;
130     my $type_end;
131     {
132         my $type;
133
134         $type_begin = sub {
135             $type = shift;
136             $in_type = 1;
137         };
138
139         $type_end = sub {
140             my $names = shift;
141
142             foreach my $name (@$names) {
143                 if($type =~ /^(?:struct|enum)/) {
144                     # $output->write("typedef $type {\n");
145                     # $output->write("} $name;\n");
146                 } else {
147                     # $output->write("typedef $type $name;\n");
148                 }
149             }
150             $in_type = 0;
151         };
152     }
153
154     my %regs_entrypoints;
155     my @comment_lines = ();
156     my @comments = ();
157     my $statements_line;
158     my $statements;
159     my $level = 0;
160     my $extern_c = 0;
161     my $again = 0;
162     my $lookahead = 0;
163     my $lookahead_count = 0;
164
165     print STDERR "Processing file '$file' ... " if $options->verbose;
166     open(IN, "< $file") || die "<internal>: $file: $!\n";
167     local $_ = "";
168     while($again || defined(my $line = <IN>)) {
169         $_ = "" if !defined($_);
170         if(!$again) {
171             chomp $line;
172
173             if($lookahead) {
174                 $lookahead = 0;
175                 $_ .= "\n" . $line;
176                 $lookahead_count++;
177             } else {
178                 $_ = $line;
179                 $lookahead_count = 0;
180             }
181             $output->write(" $level($lookahead_count): $line\n") if $options->debug >= 2;
182             $output->write("*** $_\n") if $options->debug >= 3;
183         } else {
184             $lookahead_count = 0;
185             $again = 0;
186         }
187
188         # CVS merge conflicts in file?
189         if(/^(<<<<<<<|=======|>>>>>>>)/) {
190             $output->write("$file: merge conflicts in file\n");
191             last;
192         }
193
194         # remove C comments
195         if(s/^([^\"\/]*?(?:\"[^\"]*?\"[^\"]*?)*?)(?=\/\*)//s) {
196             my $prefix = $1;
197             if(s/^(\/\*.*?\*\/)//s) {
198                 my @lines = split(/\n/, $1);
199                 push @comment_lines, $.;
200                 push @comments, $1;
201                 &$c_comment_found_callback($. - $#lines, $., $1);
202                 if($#lines <= 0) {
203                     $_ = "$prefix $_";
204                 } else {
205                     $_ = $prefix . ("\n" x $#lines) . $_;
206                 }
207                 $again = 1;
208             } else {
209                 $_ = "$prefix$_";
210                 $lookahead = 1;
211             }
212             next;
213         }
214
215         # remove C++ comments
216         while(s/^([^\"\/]*?(?:\"[^\"]*?\"[^\"]*?)*?)(\/\/.*?)$/$1/s) {
217             &$cplusplus_comment_found_callback($., $2);
218             $again = 1;
219         }
220         if($again) { next; }
221
222         # remove preprocessor directives
223         if(s/^\s*\#/\#/s) {
224             if(/^(\#.*?)\\$/s) {
225                 $_ = "$1\n";
226                 $lookahead = 1;
227                 next;
228             } elsif(s/^\#\s*(\w+)((?:\s+(.*?))?\s*)$//s) {
229                 my @lines = split(/\n/, $2);
230                 if($#lines > 0) {
231                     $_ = "\n" x $#lines;
232                 }
233                 if(defined($3)) {
234                     &$preprocessor_found_callback($1, $3);
235                 } else {
236                     &$preprocessor_found_callback($1, "");
237                 }
238                 $again = 1;
239                 next;
240             }
241         }
242
243         # Remove extern "C"
244         if(s/^\s*extern\s+"C"\s+\{//m) {
245             $extern_c = 1;
246             $again = 1;
247             next;
248         }
249
250         my $documentation_line;
251         my $documentation;
252         my @argument_documentations = ();
253         {
254             my $n = $#comments;
255             while($n >= 0 && ($comments[$n] !~ /^\/\*\*/ ||
256                               $comments[$n] =~ /^\/\*\*+\/$/))
257             {
258                 $n--;
259             }
260
261             if(defined($comments[$n]) && $n >= 0) {
262                 my @lines = split(/\n/, $comments[$n]);
263
264                 $documentation_line = $comment_lines[$n] - scalar(@lines) + 1;
265                 $documentation = $comments[$n];
266
267                 for(my $m=$n+1; $m <= $#comments; $m++) {
268                     if($comments[$m] =~ /^\/\*\*+\/$/ ||
269                        $comments[$m] =~ /^\/\*\s*(?:\!)?defined/) # FIXME: Kludge
270                     {
271                         @argument_documentations = ();
272                         next;
273                     }
274                     push @argument_documentations, $comments[$m];
275                 }
276             } else {
277                 $documentation = "";
278             }
279         }
280
281         if($level > 0)
282         {
283             my $line = "";
284             while(/^[^\{\}]/) {
285                 s/^([^\{\}\'\"]*)//s;
286                 $line .= $1;
287                 if(s/^\'//) {
288                     $line .= "\'";
289                     while(/^./ && !s/^\'//) {
290                         s/^([^\'\\]*)//s;
291                         $line .= $1;
292                         if(s/^\\//) {
293                             $line .= "\\";
294                             if(s/^(.)//s) {
295                                 $line .= $1;
296                                 if($1 eq "0") {
297                                     s/^(\d{0,3})//s;
298                                     $line .= $1;
299                                 }
300                             }
301                         }
302                     }
303                     $line .= "\'";
304                 } elsif(s/^\"//) {
305                     $line .= "\"";
306                     while(/^./ && !s/^\"//) {
307                         s/^([^\"\\]*)//s;
308                         $line .= $1;
309                         if(s/^\\//) {
310                             $line .= "\\";
311                             if(s/^(.)//s) {
312                                 $line .= $1;
313                                 if($1 eq "0") {
314                                     s/^(\d{0,3})//s;
315                                     $line .= $1;
316                                 }
317                             }
318                         }
319                     }
320                     $line .= "\"";
321                 }
322             }
323
324             if(s/^\{//) {
325                 $_ = $'; $again = 1;
326                 $line .= "{";
327                 print "+1: \{$_\n" if $options->debug >= 2;
328                 $level++;
329                 $statements .= $line;
330             } elsif(s/^\}//) {
331                 $_ = $'; $again = 1;
332                 $line .= "}" if $level > 1;
333                 print "-1: \}$_\n" if $options->debug >= 2;
334                 $level--;
335                 if($level == -1 && $extern_c) {
336                     $extern_c = 0;
337                     $level = 0;
338                 }
339                 $statements .= $line;
340             } else {
341                 $statements .= "$line\n";
342             }
343
344             if($level == 0) {
345                 if($in_function) {
346                     &$function_end($statements_line, $statements);
347                     $statements = undef;
348                 } elsif($in_type) {
349                     if(/^\s*(?:WINE_PACKED\s+)?((?:\*\s*)?\w+\s*(?:\s*,\s*(?:\*+\s*)?\w+)*\s*);/s) {
350                         my @parts = split(/\s*,\s*/, $1);
351                         &$type_end([@parts]);
352                     } elsif(/;/s) {
353                         die "$file: $.: syntax error: '$_'\n";
354                     } else {
355                         $lookahead = 1;
356                     }
357                 }
358             }
359             next;
360         } elsif(/(extern\s+|static\s+)?((struct\s+|union\s+|enum\s+|signed\s+|unsigned\s+)?\w+((\s*\*)+\s*|\s+))
361             ((__cdecl|__stdcall|CDECL|VFWAPIV|VFWAPI|WINAPIV|WINAPI|CALLBACK)\s+)?
362             (\w+(\(\w+\))?)\s*\((.*?)\)\s*(\{|\;)/sx)
363         {
364             my @lines = split(/\n/, $&);
365             my $function_line = $. - scalar(@lines) + 1;
366
367             $_ = $'; $again = 1;
368
369             if($11 eq "{")  {
370                 $level++;
371             }
372
373             my $linkage = $1;
374             my $return_type = $2;
375             my $calling_convention = $7;
376             my $name = $8;
377             my $arguments = $10;
378
379             if(!defined($linkage)) {
380                 $linkage = "";
381             }
382
383             if(!defined($calling_convention)) {
384                 $calling_convention = "";
385             }
386
387             $linkage =~ s/\s*$//;
388
389             $return_type =~ s/\s*$//;
390             $return_type =~ s/\s*\*\s*/*/g;
391             $return_type =~ s/(\*+)/ $1/g;
392
393             if($regs_entrypoints{$name}) {
394                 $name = $regs_entrypoints{$name};
395             }
396
397             $arguments =~ y/\t\n/  /;
398             $arguments =~ s/^\s*(.*?)\s*$/$1/;
399             if($arguments eq "") { $arguments = "..." }
400
401             my @argument_types;
402             my @argument_names;
403             my @arguments;
404             my $n = 0;
405             while ($arguments =~ s/^((?:[^,\(\)]*|(?:\([^\)]*\))?)+)(?:,|$)// && $1) {
406                 my $argument = $1;
407                 push @arguments, $argument;
408
409                 my $argument_type = "";
410                 my $argument_name = "";
411
412                 $argument =~ s/^\s*(.*?)\s*$/$1/;
413                 # print "  " . ($n + 1) . ": '$argument'\n";
414                 $argument =~ s/^(IN OUT(?=\s)|IN(?=\s)|OUT(?=\s)|\s*)\s*//;
415                 $argument =~ s/^(const(?=\s)|CONST(?=\s)|\s*)\s*//;
416                 if($argument =~ /^\.\.\.$/) {
417                     $argument_type = "...";
418                     $argument_name = "...";
419                 } elsif($argument =~ /^
420                         ((?:struct\s+|union\s+|enum\s+|register\s+|(?:signed\s+|unsigned\s+)
421                           (?:short\s+(?=int)|long\s+(?=int))?)?\w+)\s*
422                         ((?:__RPC_FAR|const|CONST)?\s*(?:\*\s*(?:__RPC_FAR|const|CONST)?\s*?)*)\s*
423                         (?:WINE_UNUSED\s+)?(\w*)\s*(?:\[\]|\s+OPTIONAL|\s+WINE_UNUSED)?$/x)
424                 {
425                     $argument_type = $1;
426                     if ($2) {
427                         $argument_type .= " $2";
428                     }
429                     $argument_name = $3;
430                 } elsif ($argument =~ /^
431                         ((?:struct\s+|union\s+|enum\s+|register\s+|(?:signed\s+|unsigned\s+)
432                           (?:short\s+(?=int)|long\s+(?=int))?)?\w+)\s*
433                         ((?:const)?\s*(?:\*\s*(?:const)?\s*?)*)\s*
434                         (?:__cdecl\s+|__stdcall\s+|CALLBACK\s+|WINAPI\s+)?
435                         \(\s*(?:__cdecl|__stdcall|CALLBACK|WINAPI)?\s*\*\s*((?:\w+)?)\s*\)\s*
436                         \(\s*(.*?)\s*\)$/x) 
437                 {
438                     my $return_type = $1;
439                     if($2) {
440                         $return_type .= " $2";
441                     }
442                     $argument_name = $3;
443                     my $arguments = $4;
444
445                     $return_type =~ s/\s+/ /g;
446                     $arguments =~ s/\s*,\s*/,/g;
447                     
448                     $argument_type = "$return_type (*)($arguments)";
449                 } elsif ($argument =~ /^
450                         ((?:struct\s+|union\s+|enum\s+|register\s+|(?:signed\s+|unsigned\s+)
451                           (?:short\s+(?=int)|long\s+(?=int))?)?\w+)\s*
452                         ((?:const)?\s*(?:\*\s*(?:const)?\s*?)*)\s*
453                         (\w+)\s*\[\s*(.*?)\s*\](?:\[\s*(.*?)\s*\])?$/x)
454                 {
455                     my $return_type = $1;
456                     if($2) {
457                         $return_type .= " $2";
458                     }
459                     $argument_name = $3;
460
461                     $argument_type = "$return_type\[$4\]";
462
463                     if (defined($5)) {
464                         $argument_type .= "\[$5\]";
465                     }
466
467                     # die "$file: $.: syntax error: '$argument_type':'$argument_name'\n";
468                 } else {
469                     die "$file: $.: syntax error: '$argument'\n";
470                 }
471
472                 $argument_type =~ s/\s*const\s*/ /g; # Remove const
473                 $argument_type =~ s/([^\*\(\s])\*/$1 \*/g; # Assure whitespace between non-* and *
474                 $argument_type =~ s/,([^\s])/, $1/g; # Assure whitespace after ,
475                 $argument_type =~ s/\*\s+\*/\*\*/g; # Remove whitespace between * and *
476                 $argument_type =~ s/([\(\[])\s+/$1/g; # Remove whitespace after ( and [
477                 $argument_type =~ s/\s+([\)\]])/$1/g; # Remove whitespace before ] and )
478                 $argument_type =~ s/\s+/ /; # Remove multiple whitespace
479                 $argument_type =~ s/^\s*(.*?)\s*$/$1/; # Remove leading and trailing whitespace
480
481                 $argument_name =~ s/^\s*(.*?)\s*$/$1/; # Remove leading and trailing whitespace
482
483                 $argument_types[$n] = $argument_type;
484                 $argument_names[$n] = $argument_name;
485                 # print "  " . ($n + 1) . ": '" . $argument_types[$n] . "', '" . $argument_names[$n] . "'\n";
486
487                 $n++;
488             }
489             if($#argument_types == 0 && $argument_types[0] =~ /^void$/i) {
490                 $#argument_types = -1;
491                 $#argument_names = -1;
492             }
493
494             if($options->debug) {
495                 print "$file: $return_type $calling_convention $name(" . join(",", @arguments) . ")\n";
496             }
497
498             &$function_begin($documentation_line, $documentation,
499                              $function_line, $linkage, $return_type, $calling_convention, $name,
500                              \@argument_types,\@argument_names,\@argument_documentations);
501             if($level == 0) {
502                 &$function_end(undef, undef);
503             }
504             $statements_line = $.;
505             $statements = "";
506         } elsif(/__ASM_GLOBAL_FUNC\(\s*(.*?)\s*,/s) {
507             my @lines = split(/\n/, $&);
508             my $function_line = $. - scalar(@lines) + 1;
509
510             $_ = $'; $again = 1;
511
512             &$function_begin($documentation_line, $documentation,
513                              $function_line, "", "void", "__asm", $1);
514             &$function_end($., "");
515         } elsif(/WAVEIN_SHORTCUT_0\s*\(\s*(.*?)\s*,\s*(.*?)\s*\)/s) {
516             my @lines = split(/\n/, $&);
517             my $function_line = $. - scalar(@lines) + 1;
518
519             $_ = $'; $again = 1;
520             my @arguments16 = ("HWAVEIN16");
521             my @arguments32 = ("HWAVEIN");
522             &$function_begin($documentation_line, $documentation,
523                              $function_line,  "", "UINT16", "WINAPI", "waveIn" . $1 . "16", \@arguments16);
524             &$function_end($., "");
525             &$function_begin($documentation_line, $documentation,
526                              $function_line, "", "UINT", "WINAPI", "waveIn" . $1, \@arguments32);
527             &$function_end($., "");
528         } elsif(/WAVEOUT_SHORTCUT_0\s*\(\s*(.*?)\s*,\s*(.*?)\s*\)/s) {
529             my @lines = split(/\n/, $&);
530             my $function_line = $. - scalar(@lines) + 1;
531
532             $_ = $'; $again = 1;
533
534             my @arguments16 = ("HWAVEOUT16");
535             my @arguments32 = ("HWAVEOUT");
536             &$function_begin($documentation_line, $documentation,
537                              $function_line, "", "UINT16", "WINAPI", "waveOut" . $1 . "16", \@arguments16);
538             &$function_end($., "");
539             &$function_begin($documentation_line, $documentation,
540                              $function_line, "", "UINT", "WINAPI", "waveOut" . $1, \@arguments32);
541             &$function_end($., "");
542         } elsif(/WAVEOUT_SHORTCUT_(1|2)\s*\(\s*(.*?)\s*,\s*(.*?)\s*,\s*(.*?)\s*\)/s) {
543             my @lines = split(/\n/, $&);
544             my $function_line = $. - scalar(@lines) + 1;
545
546             $_ = $'; $again = 1;
547
548             if($1 eq "1") {
549                 my @arguments16 = ("HWAVEOUT16", $4);
550                 my @arguments32 = ("HWAVEOUT", $4);
551                 &$function_begin($documentation_line, $documentation,
552                                  $function_line, "", "UINT16", "WINAPI", "waveOut" . $2 . "16", \@arguments16);
553                 &$function_end($function_line, "");
554                 &$function_begin($documentation_line, $documentation,
555                                  $function_line, "", "UINT", "WINAPI", "waveOut" . $2, \@arguments32);
556                 &$function_end($function_line, "");
557             } elsif($1 eq 2) {
558                 my @arguments16 = ("UINT16", $4);
559                 my @arguments32 = ("UINT", $4);
560                 &$function_begin($documentation_line, $documentation,
561                                  $function_line, "", "UINT16", "WINAPI", "waveOut". $2 . "16", \@arguments16);
562                 &$function_end($function_line, "");
563                 &$function_begin($documentation_line, $documentation,
564                                  $function_line, "", "UINT", "WINAPI", "waveOut" . $2, \@arguments32);
565                 &$function_end($function_line, "");
566             }
567         } elsif(/DEFINE_THISCALL_WRAPPER\((\S*)\)/s) {
568             my @lines = split(/\n/, $&);
569             my $function_line = $. - scalar(@lines) + 1;
570
571             $_ = $'; $again = 1;
572
573             &$function_begin($documentation_line, $documentation,
574                              $function_line, "", "void", "", "__thiscall_" . $1, \());
575             &$function_end($function_line, "");
576         } elsif(/DEFINE_REGS_ENTRYPOINT_\d+\(\s*(\S*)\s*,\s*([^\s,\)]*).*?\)/s) {
577             $_ = $'; $again = 1;
578             $regs_entrypoints{$2} = $1;
579         } elsif(/DEFAULT_DEBUG_CHANNEL\s*\((\S+)\)/s) {
580             $_ = $'; $again = 1;
581             unshift @$debug_channels, $1;
582         } elsif(/(DEFAULT|DECLARE)_DEBUG_CHANNEL\s*\((\S+)\)/s) {
583             $_ = $'; $again = 1;
584             push @$debug_channels, $1;
585         } elsif(/typedef\s+(enum|struct|union)(?:\s+(\w+))?\s*\{/s) {
586             $_ = $'; $again = 1;
587             $level++;
588             my $type = $1;
589             if(defined($2)) {
590                $type .= " $2";
591             }
592             &$type_begin($type);
593         } elsif(/typedef\s+
594                 ((?:const\s+|enum\s+|long\s+|signed\s+|short\s+|struct\s+|union\s+|unsigned\s+)*?)
595                 (\w+)
596                 (?:\s+const)?
597                 ((?:\s*\*+\s*|\s+)\w+\s*(?:\[[^\]]*\])*
598                 (?:\s*,\s*(?:\s*\*+\s*|\s+)\w+\s*(?:\[[^\]]*\])?)*)
599                 \s*;/sx)
600         {
601             $_ = $'; $again = 1;
602
603             my $type = "$1 $2";
604
605             my @names;
606             my @parts = split(/\s*,\s*/, $2);
607             foreach my $part (@parts) {
608                 if($part =~ /(?:\s*(\*+)\s*|\s+)(\w+)\s*(\[[^\]]*\])?/) {
609                     my $name = $2;
610                     if(defined($1)) {
611                         $name = "$1$2";
612                     }
613                     if(defined($3)) {
614                         $name .= $3;
615                     }
616                     push @names, $name;
617                 }
618             }
619             &$type_begin($type);
620             &$type_end([@names]);
621         } elsif(/typedef\s+
622                 (?:(?:const\s+|enum\s+|long\s+|signed\s+|short\s+|struct\s+|union\s+|unsigned\s+)*?)
623                 (\w+(?:\s*\*+\s*)?)\s+
624                 (?:(\w+)\s*)?
625                 \((?:(\w+)\s*)?\s*\*\s*(\w+)\s*\)\s*
626                 (?:\(([^\)]*)\)|\[([^\]]*)\])\s*;/sx)
627         {
628             $_ = $'; $again = 1;
629             my $type;
630             if(defined($2) || defined($3)) {
631                 my $cc = $2 || $3;
632                 if(defined($5)) {
633                     $type = "$1 ($cc *)($5)";
634                 } else {
635                     $type = "$1 ($cc *)[$6]";
636                 }
637             } else {
638                 if(defined($5)) {
639                     $type = "$1 (*)($5)";
640                 } else {
641                     $type = "$1 (*)[$6]";
642                 }
643             }
644             my $name = $4;
645             &$type_begin($type);
646             &$type_end([$name]);
647         } elsif(/typedef[^\{;]*;/s) {
648             $_ = $'; $again = 1;
649             $output->write("$file: $.: can't parse: '$&'\n");
650         } elsif(/typedef[^\{]*\{[^\}]*\}[^;];/s) {
651             $_ = $'; $again = 1;
652             $output->write("$file: $.: can't parse: '$&'\n");
653         } elsif(/\'[^\']*\'/s) {
654             $_ = $'; $again = 1;
655         } elsif(/\"[^\"]*\"/s) {
656             $_ = $'; $again = 1;
657         } elsif(/;/s) {
658             $_ = $'; $again = 1;
659         } elsif(/extern\s+"C"\s+{/s) {
660             $_ = $'; $again = 1;
661         } elsif(/\{/s) {
662             $_ = $'; $again = 1;
663             print "+1: $_\n" if $options->debug >= 2;
664             $level++;
665         } else {
666             $lookahead = 1;
667         }
668     }
669     close(IN);
670     print STDERR "done\n" if $options->verbose;
671     $output->write("$file: not at toplevel at end of file\n") unless $level == 0;
672 }
673
674 1;