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1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3
4use warnings;
5use strict;
6
7## Copyright (c) 1998 Michael Zucchi, All Rights Reserved ##
8## Copyright (C) 2000, 1 Tim Waugh <twaugh@redhat.com> ##
9## Copyright (C) 2001 Simon Huggins ##
10## Copyright (C) 2005-2012 Randy Dunlap ##
11## Copyright (C) 2012 Dan Luedtke ##
12## ##
13## #define enhancements by Armin Kuster <akuster@mvista.com> ##
14## Copyright (c) 2000 MontaVista Software, Inc. ##
15## ##
16## This software falls under the GNU General Public License. ##
17## Please read the COPYING file for more information ##
18
19# 18/01/2001 - Cleanups
20# Functions prototyped as foo(void) same as foo()
21# Stop eval'ing where we don't need to.
22# -- huggie@earth.li
23
24# 27/06/2001 - Allowed whitespace after initial "/**" and
25# allowed comments before function declarations.
26# -- Christian Kreibich <ck@whoop.org>
27
28# Still to do:
29# - add perldoc documentation
30# - Look more closely at some of the scarier bits :)
31
32# 26/05/2001 - Support for separate source and object trees.
33# Return error code.
34# Keith Owens <kaos@ocs.com.au>
35
36# 23/09/2001 - Added support for typedefs, structs, enums and unions
37# Support for Context section; can be terminated using empty line
38# Small fixes (like spaces vs. \s in regex)
39# -- Tim Jansen <tim@tjansen.de>
40
41# 25/07/2012 - Added support for HTML5
42# -- Dan Luedtke <mail@danrl.de>
43
44sub usage {
45 my $message = <<"EOF";
46Usage: $0 [OPTION ...] FILE ...
47
48Read C language source or header FILEs, extract embedded documentation comments,
49and print formatted documentation to standard output.
50
51The documentation comments are identified by "/**" opening comment mark. See
52Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
53
54Output format selection (mutually exclusive):
55 -man Output troff manual page format. This is the default.
56 -rst Output reStructuredText format.
57 -none Do not output documentation, only warnings.
58
59Output selection (mutually exclusive):
60 -export Only output documentation for symbols that have been
61 exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
62 in any input FILE or -export-file FILE.
63 -internal Only output documentation for symbols that have NOT been
64 exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
65 in any input FILE or -export-file FILE.
66 -function NAME Only output documentation for the given function(s)
67 or DOC: section title(s). All other functions and DOC:
68 sections are ignored. May be specified multiple times.
69 -nofunction NAME Do NOT output documentation for the given function(s);
70 only output documentation for the other functions and
71 DOC: sections. May be specified multiple times.
72
73Output selection modifiers:
74 -no-doc-sections Do not output DOC: sections.
75 -enable-lineno Enable output of #define LINENO lines. Only works with
76 reStructuredText format.
77 -export-file FILE Specify an additional FILE in which to look for
78 EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
79 -export or -internal. May be specified multiple times.
80
81Other parameters:
82 -v Verbose output, more warnings and other information.
83 -h Print this help.
84
85EOF
86 print $message;
87 exit 1;
88}
89
90#
91# format of comments.
92# In the following table, (...)? signifies optional structure.
93# (...)* signifies 0 or more structure elements
94# /**
95# * function_name(:)? (- short description)?
96# (* @parameterx: (description of parameter x)?)*
97# (* a blank line)?
98# * (Description:)? (Description of function)?
99# * (section header: (section description)? )*
100# (*)?*/
101#
102# So .. the trivial example would be:
103#
104# /**
105# * my_function
106# */
107#
108# If the Description: header tag is omitted, then there must be a blank line
109# after the last parameter specification.
110# e.g.
111# /**
112# * my_function - does my stuff
113# * @my_arg: its mine damnit
114# *
115# * Does my stuff explained.
116# */
117#
118# or, could also use:
119# /**
120# * my_function - does my stuff
121# * @my_arg: its mine damnit
122# * Description: Does my stuff explained.
123# */
124# etc.
125#
126# Besides functions you can also write documentation for structs, unions,
127# enums and typedefs. Instead of the function name you must write the name
128# of the declaration; the struct/union/enum/typedef must always precede
129# the name. Nesting of declarations is not supported.
130# Use the argument mechanism to document members or constants.
131# e.g.
132# /**
133# * struct my_struct - short description
134# * @a: first member
135# * @b: second member
136# *
137# * Longer description
138# */
139# struct my_struct {
140# int a;
141# int b;
142# /* private: */
143# int c;
144# };
145#
146# All descriptions can be multiline, except the short function description.
147#
148# For really longs structs, you can also describe arguments inside the
149# body of the struct.
150# eg.
151# /**
152# * struct my_struct - short description
153# * @a: first member
154# * @b: second member
155# *
156# * Longer description
157# */
158# struct my_struct {
159# int a;
160# int b;
161# /**
162# * @c: This is longer description of C
163# *
164# * You can use paragraphs to describe arguments
165# * using this method.
166# */
167# int c;
168# };
169#
170# This should be use only for struct/enum members.
171#
172# You can also add additional sections. When documenting kernel functions you
173# should document the "Context:" of the function, e.g. whether the functions
174# can be called form interrupts. Unlike other sections you can end it with an
175# empty line.
176# A non-void function should have a "Return:" section describing the return
177# value(s).
178# Example-sections should contain the string EXAMPLE so that they are marked
179# appropriately in DocBook.
180#
181# Example:
182# /**
183# * user_function - function that can only be called in user context
184# * @a: some argument
185# * Context: !in_interrupt()
186# *
187# * Some description
188# * Example:
189# * user_function(22);
190# */
191# ...
192#
193#
194# All descriptive text is further processed, scanning for the following special
195# patterns, which are highlighted appropriately.
196#
197# 'funcname()' - function
198# '$ENVVAR' - environmental variable
199# '&struct_name' - name of a structure (up to two words including 'struct')
200# '&struct_name.member' - name of a structure member
201# '@parameter' - name of a parameter
202# '%CONST' - name of a constant.
203# '``LITERAL``' - literal string without any spaces on it.
204
205## init lots of data
206
207my $errors = 0;
208my $warnings = 0;
209my $anon_struct_union = 0;
210
211# match expressions used to find embedded type information
212my $type_constant = '\b``([^\`]+)``\b';
213my $type_constant2 = '\%([-_\w]+)';
214my $type_func = '(\w+)\(\)';
215my $type_param = '\@(\w*(\.\w+)*(\.\.\.)?)';
216my $type_fp_param = '\@(\w+)\(\)'; # Special RST handling for func ptr params
217my $type_env = '(\$\w+)';
218my $type_enum = '\&(enum\s*([_\w]+))';
219my $type_struct = '\&(struct\s*([_\w]+))';
220my $type_typedef = '\&(typedef\s*([_\w]+))';
221my $type_union = '\&(union\s*([_\w]+))';
222my $type_member = '\&([_\w]+)(\.|->)([_\w]+)';
223my $type_fallback = '\&([_\w]+)';
224my $type_member_func = $type_member . '\(\)';
225
226# Output conversion substitutions.
227# One for each output format
228
229# these are pretty rough
230my @highlights_man = (
231 [$type_constant, "\$1"],
232 [$type_constant2, "\$1"],
233 [$type_func, "\\\\fB\$1\\\\fP"],
234 [$type_enum, "\\\\fI\$1\\\\fP"],
235 [$type_struct, "\\\\fI\$1\\\\fP"],
236 [$type_typedef, "\\\\fI\$1\\\\fP"],
237 [$type_union, "\\\\fI\$1\\\\fP"],
238 [$type_param, "\\\\fI\$1\\\\fP"],
239 [$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
240 [$type_fallback, "\\\\fI\$1\\\\fP"]
241 );
242my $blankline_man = "";
243
244# rst-mode
245my @highlights_rst = (
246 [$type_constant, "``\$1``"],
247 [$type_constant2, "``\$1``"],
248 # Note: need to escape () to avoid func matching later
249 [$type_member_func, "\\:c\\:type\\:`\$1\$2\$3\\\\(\\\\) <\$1>`"],
250 [$type_member, "\\:c\\:type\\:`\$1\$2\$3 <\$1>`"],
251 [$type_fp_param, "**\$1\\\\(\\\\)**"],
252 [$type_func, "\\:c\\:func\\:`\$1()`"],
253 [$type_enum, "\\:c\\:type\\:`\$1 <\$2>`"],
254 [$type_struct, "\\:c\\:type\\:`\$1 <\$2>`"],
255 [$type_typedef, "\\:c\\:type\\:`\$1 <\$2>`"],
256 [$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
257 # in rst this can refer to any type
258 [$type_fallback, "\\:c\\:type\\:`\$1`"],
259 [$type_param, "**\$1**"]
260 );
261my $blankline_rst = "\n";
262
263# read arguments
264if ($#ARGV == -1) {
265 usage();
266}
267
268my $kernelversion;
269my $dohighlight = "";
270
271my $verbose = 0;
272my $output_mode = "rst";
273my $output_preformatted = 0;
274my $no_doc_sections = 0;
275my $enable_lineno = 0;
276my @highlights = @highlights_rst;
277my $blankline = $blankline_rst;
278my $modulename = "Kernel API";
279
280use constant {
281 OUTPUT_ALL => 0, # output all symbols and doc sections
282 OUTPUT_INCLUDE => 1, # output only specified symbols
283 OUTPUT_EXCLUDE => 2, # output everything except specified symbols
284 OUTPUT_EXPORTED => 3, # output exported symbols
285 OUTPUT_INTERNAL => 4, # output non-exported symbols
286};
287my $output_selection = OUTPUT_ALL;
288my $show_not_found = 0;
289
290my @export_file_list;
291
292my @build_time;
293if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
294 (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
295 @build_time = gmtime($seconds);
296} else {
297 @build_time = localtime;
298}
299
300my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
301 'July', 'August', 'September', 'October',
302 'November', 'December')[$build_time[4]] .
303 " " . ($build_time[5]+1900);
304
305# Essentially these are globals.
306# They probably want to be tidied up, made more localised or something.
307# CAVEAT EMPTOR! Some of the others I localised may not want to be, which
308# could cause "use of undefined value" or other bugs.
309my ($function, %function_table, %parametertypes, $declaration_purpose);
310my $declaration_start_line;
311my ($type, $declaration_name, $return_type);
312my ($newsection, $newcontents, $prototype, $brcount, %source_map);
313
314if (defined($ENV{'KBUILD_VERBOSE'})) {
315 $verbose = "$ENV{'KBUILD_VERBOSE'}";
316}
317
318# Generated docbook code is inserted in a template at a point where
319# docbook v3.1 requires a non-zero sequence of RefEntry's; see:
320# http://www.oasis-open.org/docbook/documentation/reference/html/refentry.html
321# We keep track of number of generated entries and generate a dummy
322# if needs be to ensure the expanded template can be postprocessed
323# into html.
324my $section_counter = 0;
325
326my $lineprefix="";
327
328# Parser states
329use constant {
330 STATE_NORMAL => 0, # normal code
331 STATE_NAME => 1, # looking for function name
332 STATE_BODY_MAYBE => 2, # body - or maybe more description
333 STATE_BODY => 3, # the body of the comment
334 STATE_PROTO => 4, # scanning prototype
335 STATE_DOCBLOCK => 5, # documentation block
336 STATE_INLINE => 6, # gathering documentation outside main block
337};
338my $state;
339my $in_doc_sect;
340my $leading_space;
341
342# Inline documentation state
343use constant {
344 STATE_INLINE_NA => 0, # not applicable ($state != STATE_INLINE)
345 STATE_INLINE_NAME => 1, # looking for member name (@foo:)
346 STATE_INLINE_TEXT => 2, # looking for member documentation
347 STATE_INLINE_END => 3, # done
348 STATE_INLINE_ERROR => 4, # error - Comment without header was found.
349 # Spit a warning as it's not
350 # proper kernel-doc and ignore the rest.
351};
352my $inline_doc_state;
353
354#declaration types: can be
355# 'function', 'struct', 'union', 'enum', 'typedef'
356my $decl_type;
357
358my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
359my $doc_end = '\*/';
360my $doc_com = '\s*\*\s*';
361my $doc_com_body = '\s*\* ?';
362my $doc_decl = $doc_com . '(\w+)';
363# @params and a strictly limited set of supported section names
364my $doc_sect = $doc_com .
365 '\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:(.*)';
366my $doc_content = $doc_com_body . '(.*)';
367my $doc_block = $doc_com . 'DOC:\s*(.*)?';
368my $doc_inline_start = '^\s*/\*\*\s*$';
369my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
370my $doc_inline_end = '^\s*\*/\s*$';
371my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
372my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
373
374my %parameterdescs;
375my %parameterdesc_start_lines;
376my @parameterlist;
377my %sections;
378my @sectionlist;
379my %section_start_lines;
380my $sectcheck;
381my $struct_actual;
382
383my $contents = "";
384my $new_start_line = 0;
385
386# the canonical section names. see also $doc_sect above.
387my $section_default = "Description"; # default section
388my $section_intro = "Introduction";
389my $section = $section_default;
390my $section_context = "Context";
391my $section_return = "Return";
392
393my $undescribed = "-- undescribed --";
394
395reset_state();
396
397while ($ARGV[0] =~ m/^--?(.*)/) {
398 my $cmd = $1;
399 shift @ARGV;
400 if ($cmd eq "man") {
401 $output_mode = "man";
402 @highlights = @highlights_man;
403 $blankline = $blankline_man;
404 } elsif ($cmd eq "rst") {
405 $output_mode = "rst";
406 @highlights = @highlights_rst;
407 $blankline = $blankline_rst;
408 } elsif ($cmd eq "none") {
409 $output_mode = "none";
410 } elsif ($cmd eq "module") { # not needed for XML, inherits from calling document
411 $modulename = shift @ARGV;
412 } elsif ($cmd eq "function") { # to only output specific functions
413 $output_selection = OUTPUT_INCLUDE;
414 $function = shift @ARGV;
415 $function_table{$function} = 1;
416 } elsif ($cmd eq "nofunction") { # output all except specific functions
417 $output_selection = OUTPUT_EXCLUDE;
418 $function = shift @ARGV;
419 $function_table{$function} = 1;
420 } elsif ($cmd eq "export") { # only exported symbols
421 $output_selection = OUTPUT_EXPORTED;
422 %function_table = ();
423 } elsif ($cmd eq "internal") { # only non-exported symbols
424 $output_selection = OUTPUT_INTERNAL;
425 %function_table = ();
426 } elsif ($cmd eq "export-file") {
427 my $file = shift @ARGV;
428 push(@export_file_list, $file);
429 } elsif ($cmd eq "v") {
430 $verbose = 1;
431 } elsif (($cmd eq "h") || ($cmd eq "help")) {
432 usage();
433 } elsif ($cmd eq 'no-doc-sections') {
434 $no_doc_sections = 1;
435 } elsif ($cmd eq 'enable-lineno') {
436 $enable_lineno = 1;
437 } elsif ($cmd eq 'show-not-found') {
438 $show_not_found = 1;
439 } else {
440 # Unknown argument
441 usage();
442 }
443}
444
445# continue execution near EOF;
446
447# get kernel version from env
448sub get_kernel_version() {
449 my $version = 'unknown kernel version';
450
451 if (defined($ENV{'KERNELVERSION'})) {
452 $version = $ENV{'KERNELVERSION'};
453 }
454 return $version;
455}
456
457#
458sub print_lineno {
459 my $lineno = shift;
460 if ($enable_lineno && defined($lineno)) {
461 print "#define LINENO " . $lineno . "\n";
462 }
463}
464##
465# dumps section contents to arrays/hashes intended for that purpose.
466#
467sub dump_section {
468 my $file = shift;
469 my $name = shift;
470 my $contents = join "\n", @_;
471
472 if ($name =~ m/$type_param/) {
473 $name = $1;
474 $parameterdescs{$name} = $contents;
475 $sectcheck = $sectcheck . $name . " ";
476 $parameterdesc_start_lines{$name} = $new_start_line;
477 $new_start_line = 0;
478 } elsif ($name eq "@\.\.\.") {
479 $name = "...";
480 $parameterdescs{$name} = $contents;
481 $sectcheck = $sectcheck . $name . " ";
482 $parameterdesc_start_lines{$name} = $new_start_line;
483 $new_start_line = 0;
484 } else {
485 if (defined($sections{$name}) && ($sections{$name} ne "")) {
486 # Only warn on user specified duplicate section names.
487 if ($name ne $section_default) {
488 print STDERR "${file}:$.: warning: duplicate section name '$name'\n";
489 ++$warnings;
490 }
491 $sections{$name} .= $contents;
492 } else {
493 $sections{$name} = $contents;
494 push @sectionlist, $name;
495 $section_start_lines{$name} = $new_start_line;
496 $new_start_line = 0;
497 }
498 }
499}
500
501##
502# dump DOC: section after checking that it should go out
503#
504sub dump_doc_section {
505 my $file = shift;
506 my $name = shift;
507 my $contents = join "\n", @_;
508
509 if ($no_doc_sections) {
510 return;
511 }
512
513 if (($output_selection == OUTPUT_ALL) ||
514 ($output_selection == OUTPUT_INCLUDE &&
515 defined($function_table{$name})) ||
516 ($output_selection == OUTPUT_EXCLUDE &&
517 !defined($function_table{$name})))
518 {
519 dump_section($file, $name, $contents);
520 output_blockhead({'sectionlist' => \@sectionlist,
521 'sections' => \%sections,
522 'module' => $modulename,
523 'content-only' => ($output_selection != OUTPUT_ALL), });
524 }
525}
526
527##
528# output function
529#
530# parameterdescs, a hash.
531# function => "function name"
532# parameterlist => @list of parameters
533# parameterdescs => %parameter descriptions
534# sectionlist => @list of sections
535# sections => %section descriptions
536#
537
538sub output_highlight {
539 my $contents = join "\n",@_;
540 my $line;
541
542# DEBUG
543# if (!defined $contents) {
544# use Carp;
545# confess "output_highlight got called with no args?\n";
546# }
547
548# print STDERR "contents b4:$contents\n";
549 eval $dohighlight;
550 die $@ if $@;
551# print STDERR "contents af:$contents\n";
552
553 foreach $line (split "\n", $contents) {
554 if (! $output_preformatted) {
555 $line =~ s/^\s*//;
556 }
557 if ($line eq ""){
558 if (! $output_preformatted) {
559 print $lineprefix, $blankline;
560 }
561 } else {
562 if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
563 print "\\&$line";
564 } else {
565 print $lineprefix, $line;
566 }
567 }
568 print "\n";
569 }
570}
571
572##
573# output function in man
574sub output_function_man(%) {
575 my %args = %{$_[0]};
576 my ($parameter, $section);
577 my $count;
578
579 print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
580
581 print ".SH NAME\n";
582 print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
583
584 print ".SH SYNOPSIS\n";
585 if ($args{'functiontype'} ne "") {
586 print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
587 } else {
588 print ".B \"" . $args{'function'} . "\n";
589 }
590 $count = 0;
591 my $parenth = "(";
592 my $post = ",";
593 foreach my $parameter (@{$args{'parameterlist'}}) {
594 if ($count == $#{$args{'parameterlist'}}) {
595 $post = ");";
596 }
597 $type = $args{'parametertypes'}{$parameter};
598 if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
599 # pointer-to-function
600 print ".BI \"" . $parenth . $1 . "\" " . $parameter . " \") (" . $2 . ")" . $post . "\"\n";
601 } else {
602 $type =~ s/([^\*])$/$1 /;
603 print ".BI \"" . $parenth . $type . "\" " . $parameter . " \"" . $post . "\"\n";
604 }
605 $count++;
606 $parenth = "";
607 }
608
609 print ".SH ARGUMENTS\n";
610 foreach $parameter (@{$args{'parameterlist'}}) {
611 my $parameter_name = $parameter;
612 $parameter_name =~ s/\[.*//;
613
614 print ".IP \"" . $parameter . "\" 12\n";
615 output_highlight($args{'parameterdescs'}{$parameter_name});
616 }
617 foreach $section (@{$args{'sectionlist'}}) {
618 print ".SH \"", uc $section, "\"\n";
619 output_highlight($args{'sections'}{$section});
620 }
621}
622
623##
624# output enum in man
625sub output_enum_man(%) {
626 my %args = %{$_[0]};
627 my ($parameter, $section);
628 my $count;
629
630 print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
631
632 print ".SH NAME\n";
633 print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
634
635 print ".SH SYNOPSIS\n";
636 print "enum " . $args{'enum'} . " {\n";
637 $count = 0;
638 foreach my $parameter (@{$args{'parameterlist'}}) {
639 print ".br\n.BI \" $parameter\"\n";
640 if ($count == $#{$args{'parameterlist'}}) {
641 print "\n};\n";
642 last;
643 }
644 else {
645 print ", \n.br\n";
646 }
647 $count++;
648 }
649
650 print ".SH Constants\n";
651 foreach $parameter (@{$args{'parameterlist'}}) {
652 my $parameter_name = $parameter;
653 $parameter_name =~ s/\[.*//;
654
655 print ".IP \"" . $parameter . "\" 12\n";
656 output_highlight($args{'parameterdescs'}{$parameter_name});
657 }
658 foreach $section (@{$args{'sectionlist'}}) {
659 print ".SH \"$section\"\n";
660 output_highlight($args{'sections'}{$section});
661 }
662}
663
664##
665# output struct in man
666sub output_struct_man(%) {
667 my %args = %{$_[0]};
668 my ($parameter, $section);
669
670 print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
671
672 print ".SH NAME\n";
673 print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
674
675 my $declaration = $args{'definition'};
676 $declaration =~ s/\t/ /g;
677 $declaration =~ s/\n/"\n.br\n.BI \"/g;
678 print ".SH SYNOPSIS\n";
679 print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
680 print ".BI \"$declaration\n};\n.br\n\n";
681
682 print ".SH Members\n";
683 foreach $parameter (@{$args{'parameterlist'}}) {
684 ($parameter =~ /^#/) && next;
685
686 my $parameter_name = $parameter;
687 $parameter_name =~ s/\[.*//;
688
689 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
690 print ".IP \"" . $parameter . "\" 12\n";
691 output_highlight($args{'parameterdescs'}{$parameter_name});
692 }
693 foreach $section (@{$args{'sectionlist'}}) {
694 print ".SH \"$section\"\n";
695 output_highlight($args{'sections'}{$section});
696 }
697}
698
699##
700# output typedef in man
701sub output_typedef_man(%) {
702 my %args = %{$_[0]};
703 my ($parameter, $section);
704
705 print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
706
707 print ".SH NAME\n";
708 print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
709
710 foreach $section (@{$args{'sectionlist'}}) {
711 print ".SH \"$section\"\n";
712 output_highlight($args{'sections'}{$section});
713 }
714}
715
716sub output_blockhead_man(%) {
717 my %args = %{$_[0]};
718 my ($parameter, $section);
719 my $count;
720
721 print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
722
723 foreach $section (@{$args{'sectionlist'}}) {
724 print ".SH \"$section\"\n";
725 output_highlight($args{'sections'}{$section});
726 }
727}
728
729##
730# output in restructured text
731#
732
733#
734# This could use some work; it's used to output the DOC: sections, and
735# starts by putting out the name of the doc section itself, but that tends
736# to duplicate a header already in the template file.
737#
738sub output_blockhead_rst(%) {
739 my %args = %{$_[0]};
740 my ($parameter, $section);
741
742 foreach $section (@{$args{'sectionlist'}}) {
743 if ($output_selection != OUTPUT_INCLUDE) {
744 print "**$section**\n\n";
745 }
746 print_lineno($section_start_lines{$section});
747 output_highlight_rst($args{'sections'}{$section});
748 print "\n";
749 }
750}
751
752#
753# Apply the RST highlights to a sub-block of text.
754#
755sub highlight_block($) {
756 # The dohighlight kludge requires the text be called $contents
757 my $contents = shift;
758 eval $dohighlight;
759 die $@ if $@;
760 return $contents;
761}
762
763#
764# Regexes used only here.
765#
766my $sphinx_literal = '^[^.].*::$';
767my $sphinx_cblock = '^\.\.\ +code-block::';
768
769sub output_highlight_rst {
770 my $input = join "\n",@_;
771 my $output = "";
772 my $line;
773 my $in_literal = 0;
774 my $litprefix;
775 my $block = "";
776
777 foreach $line (split "\n",$input) {
778 #
779 # If we're in a literal block, see if we should drop out
780 # of it. Otherwise pass the line straight through unmunged.
781 #
782 if ($in_literal) {
783 if (! ($line =~ /^\s*$/)) {
784 #
785 # If this is the first non-blank line in a literal
786 # block we need to figure out what the proper indent is.
787 #
788 if ($litprefix eq "") {
789 $line =~ /^(\s*)/;
790 $litprefix = '^' . $1;
791 $output .= $line . "\n";
792 } elsif (! ($line =~ /$litprefix/)) {
793 $in_literal = 0;
794 } else {
795 $output .= $line . "\n";
796 }
797 } else {
798 $output .= $line . "\n";
799 }
800 }
801 #
802 # Not in a literal block (or just dropped out)
803 #
804 if (! $in_literal) {
805 $block .= $line . "\n";
806 if (($line =~ /$sphinx_literal/) || ($line =~ /$sphinx_cblock/)) {
807 $in_literal = 1;
808 $litprefix = "";
809 $output .= highlight_block($block);
810 $block = ""
811 }
812 }
813 }
814
815 if ($block) {
816 $output .= highlight_block($block);
817 }
818 foreach $line (split "\n", $output) {
819 print $lineprefix . $line . "\n";
820 }
821}
822
823sub output_function_rst(%) {
824 my %args = %{$_[0]};
825 my ($parameter, $section);
826 my $oldprefix = $lineprefix;
827 my $start = "";
828
829 if ($args{'typedef'}) {
830 print ".. c:type:: ". $args{'function'} . "\n\n";
831 print_lineno($declaration_start_line);
832 print " **Typedef**: ";
833 $lineprefix = "";
834 output_highlight_rst($args{'purpose'});
835 $start = "\n\n**Syntax**\n\n ``";
836 } else {
837 print ".. c:function:: ";
838 }
839 if ($args{'functiontype'} ne "") {
840 $start .= $args{'functiontype'} . " " . $args{'function'} . " (";
841 } else {
842 $start .= $args{'function'} . " (";
843 }
844 print $start;
845
846 my $count = 0;
847 foreach my $parameter (@{$args{'parameterlist'}}) {
848 if ($count ne 0) {
849 print ", ";
850 }
851 $count++;
852 $type = $args{'parametertypes'}{$parameter};
853
854 if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
855 # pointer-to-function
856 print $1 . $parameter . ") (" . $2;
857 } else {
858 print $type . " " . $parameter;
859 }
860 }
861 if ($args{'typedef'}) {
862 print ");``\n\n";
863 } else {
864 print ")\n\n";
865 print_lineno($declaration_start_line);
866 $lineprefix = " ";
867 output_highlight_rst($args{'purpose'});
868 print "\n";
869 }
870
871 print "**Parameters**\n\n";
872 $lineprefix = " ";
873 foreach $parameter (@{$args{'parameterlist'}}) {
874 my $parameter_name = $parameter;
875 $parameter_name =~ s/\[.*//;
876 $type = $args{'parametertypes'}{$parameter};
877
878 if ($type ne "") {
879 print "``$type $parameter``\n";
880 } else {
881 print "``$parameter``\n";
882 }
883
884 print_lineno($parameterdesc_start_lines{$parameter_name});
885
886 if (defined($args{'parameterdescs'}{$parameter_name}) &&
887 $args{'parameterdescs'}{$parameter_name} ne $undescribed) {
888 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
889 } else {
890 print " *undescribed*\n";
891 }
892 print "\n";
893 }
894
895 $lineprefix = $oldprefix;
896 output_section_rst(@_);
897}
898
899sub output_section_rst(%) {
900 my %args = %{$_[0]};
901 my $section;
902 my $oldprefix = $lineprefix;
903 $lineprefix = "";
904
905 foreach $section (@{$args{'sectionlist'}}) {
906 print "**$section**\n\n";
907 print_lineno($section_start_lines{$section});
908 output_highlight_rst($args{'sections'}{$section});
909 print "\n";
910 }
911 print "\n";
912 $lineprefix = $oldprefix;
913}
914
915sub output_enum_rst(%) {
916 my %args = %{$_[0]};
917 my ($parameter);
918 my $oldprefix = $lineprefix;
919 my $count;
920 my $name = "enum " . $args{'enum'};
921
922 print "\n\n.. c:type:: " . $name . "\n\n";
923 print_lineno($declaration_start_line);
924 $lineprefix = " ";
925 output_highlight_rst($args{'purpose'});
926 print "\n";
927
928 print "**Constants**\n\n";
929 $lineprefix = " ";
930 foreach $parameter (@{$args{'parameterlist'}}) {
931 print "``$parameter``\n";
932 if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
933 output_highlight_rst($args{'parameterdescs'}{$parameter});
934 } else {
935 print " *undescribed*\n";
936 }
937 print "\n";
938 }
939
940 $lineprefix = $oldprefix;
941 output_section_rst(@_);
942}
943
944sub output_typedef_rst(%) {
945 my %args = %{$_[0]};
946 my ($parameter);
947 my $oldprefix = $lineprefix;
948 my $name = "typedef " . $args{'typedef'};
949
950 print "\n\n.. c:type:: " . $name . "\n\n";
951 print_lineno($declaration_start_line);
952 $lineprefix = " ";
953 output_highlight_rst($args{'purpose'});
954 print "\n";
955
956 $lineprefix = $oldprefix;
957 output_section_rst(@_);
958}
959
960sub output_struct_rst(%) {
961 my %args = %{$_[0]};
962 my ($parameter);
963 my $oldprefix = $lineprefix;
964 my $name = $args{'type'} . " " . $args{'struct'};
965
966 print "\n\n.. c:type:: " . $name . "\n\n";
967 print_lineno($declaration_start_line);
968 $lineprefix = " ";
969 output_highlight_rst($args{'purpose'});
970 print "\n";
971
972 print "**Definition**\n\n";
973 print "::\n\n";
974 my $declaration = $args{'definition'};
975 $declaration =~ s/\t/ /g;
976 print " " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration };\n\n";
977
978 print "**Members**\n\n";
979 $lineprefix = " ";
980 foreach $parameter (@{$args{'parameterlist'}}) {
981 ($parameter =~ /^#/) && next;
982
983 my $parameter_name = $parameter;
984 $parameter_name =~ s/\[.*//;
985
986 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
987 $type = $args{'parametertypes'}{$parameter};
988 print_lineno($parameterdesc_start_lines{$parameter_name});
989 print "``" . $parameter . "``\n";
990 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
991 print "\n";
992 }
993 print "\n";
994
995 $lineprefix = $oldprefix;
996 output_section_rst(@_);
997}
998
999## none mode output functions
1000
1001sub output_function_none(%) {
1002}
1003
1004sub output_enum_none(%) {
1005}
1006
1007sub output_typedef_none(%) {
1008}
1009
1010sub output_struct_none(%) {
1011}
1012
1013sub output_blockhead_none(%) {
1014}
1015
1016##
1017# generic output function for all types (function, struct/union, typedef, enum);
1018# calls the generated, variable output_ function name based on
1019# functype and output_mode
1020sub output_declaration {
1021 no strict 'refs';
1022 my $name = shift;
1023 my $functype = shift;
1024 my $func = "output_${functype}_$output_mode";
1025 if (($output_selection == OUTPUT_ALL) ||
1026 (($output_selection == OUTPUT_INCLUDE ||
1027 $output_selection == OUTPUT_EXPORTED) &&
1028 defined($function_table{$name})) ||
1029 (($output_selection == OUTPUT_EXCLUDE ||
1030 $output_selection == OUTPUT_INTERNAL) &&
1031 !($functype eq "function" && defined($function_table{$name}))))
1032 {
1033 &$func(@_);
1034 $section_counter++;
1035 }
1036}
1037
1038##
1039# generic output function - calls the right one based on current output mode.
1040sub output_blockhead {
1041 no strict 'refs';
1042 my $func = "output_blockhead_" . $output_mode;
1043 &$func(@_);
1044 $section_counter++;
1045}
1046
1047##
1048# takes a declaration (struct, union, enum, typedef) and
1049# invokes the right handler. NOT called for functions.
1050sub dump_declaration($$) {
1051 no strict 'refs';
1052 my ($prototype, $file) = @_;
1053 my $func = "dump_" . $decl_type;
1054 &$func(@_);
1055}
1056
1057sub dump_union($$) {
1058 dump_struct(@_);
1059}
1060
1061sub dump_struct($$) {
1062 my $x = shift;
1063 my $file = shift;
1064
1065 if ($x =~ /(struct|union)\s+(\w+)\s*{(.*)}/) {
1066 my $decl_type = $1;
1067 $declaration_name = $2;
1068 my $members = $3;
1069
1070 # ignore members marked private:
1071 $members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1072 $members =~ s/\/\*\s*private:.*//gosi;
1073 # strip comments:
1074 $members =~ s/\/\*.*?\*\///gos;
1075 # strip attributes
1076 $members =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
1077 $members =~ s/__aligned\s*\([^;]*\)//gos;
1078 $members =~ s/\s*CRYPTO_MINALIGN_ATTR//gos;
1079 # replace DECLARE_BITMAP
1080 $members =~ s/DECLARE_BITMAP\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
1081 # replace DECLARE_HASHTABLE
1082 $members =~ s/DECLARE_HASHTABLE\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
1083 # replace DECLARE_KFIFO
1084 $members =~ s/DECLARE_KFIFO\s*\(([^,)]+),\s*([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
1085 # replace DECLARE_KFIFO_PTR
1086 $members =~ s/DECLARE_KFIFO_PTR\s*\(([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
1087
1088 my $declaration = $members;
1089
1090 # Split nested struct/union elements as newer ones
1091 while ($members =~ m/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/) {
1092 my $newmember;
1093 my $maintype = $1;
1094 my $ids = $4;
1095 my $content = $3;
1096 foreach my $id(split /,/, $ids) {
1097 $newmember .= "$maintype $id; ";
1098
1099 $id =~ s/[:\[].*//;
1100 $id =~ s/^\s*\**(\S+)\s*/$1/;
1101 foreach my $arg (split /;/, $content) {
1102 next if ($arg =~ m/^\s*$/);
1103 if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
1104 # pointer-to-function
1105 my $type = $1;
1106 my $name = $2;
1107 my $extra = $3;
1108 next if (!$name);
1109 if ($id =~ m/^\s*$/) {
1110 # anonymous struct/union
1111 $newmember .= "$type$name$extra; ";
1112 } else {
1113 $newmember .= "$type$id.$name$extra; ";
1114 }
1115 } else {
1116 my $type;
1117 my $names;
1118 $arg =~ s/^\s+//;
1119 $arg =~ s/\s+$//;
1120 # Handle bitmaps
1121 $arg =~ s/:\s*\d+\s*//g;
1122 # Handle arrays
1123 $arg =~ s/\[.*\]//g;
1124 # The type may have multiple words,
1125 # and multiple IDs can be defined, like:
1126 # const struct foo, *bar, foobar
1127 # So, we remove spaces when parsing the
1128 # names, in order to match just names
1129 # and commas for the names
1130 $arg =~ s/\s*,\s*/,/g;
1131 if ($arg =~ m/(.*)\s+([\S+,]+)/) {
1132 $type = $1;
1133 $names = $2;
1134 } else {
1135 $newmember .= "$arg; ";
1136 next;
1137 }
1138 foreach my $name (split /,/, $names) {
1139 $name =~ s/^\s*\**(\S+)\s*/$1/;
1140 next if (($name =~ m/^\s*$/));
1141 if ($id =~ m/^\s*$/) {
1142 # anonymous struct/union
1143 $newmember .= "$type $name; ";
1144 } else {
1145 $newmember .= "$type $id.$name; ";
1146 }
1147 }
1148 }
1149 }
1150 }
1151 $members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)}([^\{\}\;]*)\;/$newmember/;
1152 }
1153
1154 # Ignore other nested elements, like enums
1155 $members =~ s/({[^\{\}]*})//g;
1156
1157 create_parameterlist($members, ';', $file, $declaration_name);
1158 check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
1159
1160 # Adjust declaration for better display
1161 $declaration =~ s/([{;])/$1\n/g;
1162 $declaration =~ s/}\s+;/};/g;
1163 # Better handle inlined enums
1164 do {} while ($declaration =~ s/(enum\s+{[^}]+),([^\n])/$1,\n$2/);
1165
1166 my @def_args = split /\n/, $declaration;
1167 my $level = 1;
1168 $declaration = "";
1169 foreach my $clause (@def_args) {
1170 $clause =~ s/^\s+//;
1171 $clause =~ s/\s+$//;
1172 $clause =~ s/\s+/ /;
1173 next if (!$clause);
1174 $level-- if ($clause =~ m/(})/ && $level > 1);
1175 if (!($clause =~ m/^\s*#/)) {
1176 $declaration .= "\t" x $level;
1177 }
1178 $declaration .= "\t" . $clause . "\n";
1179 $level++ if ($clause =~ m/({)/ && !($clause =~m/}/));
1180 }
1181 output_declaration($declaration_name,
1182 'struct',
1183 {'struct' => $declaration_name,
1184 'module' => $modulename,
1185 'definition' => $declaration,
1186 'parameterlist' => \@parameterlist,
1187 'parameterdescs' => \%parameterdescs,
1188 'parametertypes' => \%parametertypes,
1189 'sectionlist' => \@sectionlist,
1190 'sections' => \%sections,
1191 'purpose' => $declaration_purpose,
1192 'type' => $decl_type
1193 });
1194 }
1195 else {
1196 print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
1197 ++$errors;
1198 }
1199}
1200
1201
1202sub show_warnings($$) {
1203 my $functype = shift;
1204 my $name = shift;
1205
1206 return 1 if ($output_selection == OUTPUT_ALL);
1207
1208 if ($output_selection == OUTPUT_EXPORTED) {
1209 if (defined($function_table{$name})) {
1210 return 1;
1211 } else {
1212 return 0;
1213 }
1214 }
1215 if ($output_selection == OUTPUT_INTERNAL) {
1216 if (!($functype eq "function" && defined($function_table{$name}))) {
1217 return 1;
1218 } else {
1219 return 0;
1220 }
1221 }
1222 if ($output_selection == OUTPUT_INCLUDE) {
1223 if (defined($function_table{$name})) {
1224 return 1;
1225 } else {
1226 return 0;
1227 }
1228 }
1229 if ($output_selection == OUTPUT_EXCLUDE) {
1230 if (!defined($function_table{$name})) {
1231 return 1;
1232 } else {
1233 return 0;
1234 }
1235 }
1236 die("Please add the new output type at show_warnings()");
1237}
1238
1239sub dump_enum($$) {
1240 my $x = shift;
1241 my $file = shift;
1242
1243 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1244 # strip #define macros inside enums
1245 $x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
1246
1247 if ($x =~ /enum\s+(\w+)\s*{(.*)}/) {
1248 $declaration_name = $1;
1249 my $members = $2;
1250 my %_members;
1251
1252 $members =~ s/\s+$//;
1253
1254 foreach my $arg (split ',', $members) {
1255 $arg =~ s/^\s*(\w+).*/$1/;
1256 push @parameterlist, $arg;
1257 if (!$parameterdescs{$arg}) {
1258 $parameterdescs{$arg} = $undescribed;
1259 if (show_warnings("enum", $declaration_name)) {
1260 print STDERR "${file}:$.: warning: Enum value '$arg' not described in enum '$declaration_name'\n";
1261 }
1262 }
1263 $_members{$arg} = 1;
1264 }
1265
1266 while (my ($k, $v) = each %parameterdescs) {
1267 if (!exists($_members{$k})) {
1268 if (show_warnings("enum", $declaration_name)) {
1269 print STDERR "${file}:$.: warning: Excess enum value '$k' description in '$declaration_name'\n";
1270 }
1271 }
1272 }
1273
1274 output_declaration($declaration_name,
1275 'enum',
1276 {'enum' => $declaration_name,
1277 'module' => $modulename,
1278 'parameterlist' => \@parameterlist,
1279 'parameterdescs' => \%parameterdescs,
1280 'sectionlist' => \@sectionlist,
1281 'sections' => \%sections,
1282 'purpose' => $declaration_purpose
1283 });
1284 }
1285 else {
1286 print STDERR "${file}:$.: error: Cannot parse enum!\n";
1287 ++$errors;
1288 }
1289}
1290
1291sub dump_typedef($$) {
1292 my $x = shift;
1293 my $file = shift;
1294
1295 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1296
1297 # Parse function prototypes
1298 if ($x =~ /typedef\s+(\w+)\s*\(\*\s*(\w\S+)\s*\)\s*\((.*)\);/ ||
1299 $x =~ /typedef\s+(\w+)\s*(\w\S+)\s*\s*\((.*)\);/) {
1300
1301 # Function typedefs
1302 $return_type = $1;
1303 $declaration_name = $2;
1304 my $args = $3;
1305
1306 create_parameterlist($args, ',', $file, $declaration_name);
1307
1308 output_declaration($declaration_name,
1309 'function',
1310 {'function' => $declaration_name,
1311 'typedef' => 1,
1312 'module' => $modulename,
1313 'functiontype' => $return_type,
1314 'parameterlist' => \@parameterlist,
1315 'parameterdescs' => \%parameterdescs,
1316 'parametertypes' => \%parametertypes,
1317 'sectionlist' => \@sectionlist,
1318 'sections' => \%sections,
1319 'purpose' => $declaration_purpose
1320 });
1321 return;
1322 }
1323
1324 while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
1325 $x =~ s/\(*.\)\s*;$/;/;
1326 $x =~ s/\[*.\]\s*;$/;/;
1327 }
1328
1329 if ($x =~ /typedef.*\s+(\w+)\s*;/) {
1330 $declaration_name = $1;
1331
1332 output_declaration($declaration_name,
1333 'typedef',
1334 {'typedef' => $declaration_name,
1335 'module' => $modulename,
1336 'sectionlist' => \@sectionlist,
1337 'sections' => \%sections,
1338 'purpose' => $declaration_purpose
1339 });
1340 }
1341 else {
1342 print STDERR "${file}:$.: error: Cannot parse typedef!\n";
1343 ++$errors;
1344 }
1345}
1346
1347sub save_struct_actual($) {
1348 my $actual = shift;
1349
1350 # strip all spaces from the actual param so that it looks like one string item
1351 $actual =~ s/\s*//g;
1352 $struct_actual = $struct_actual . $actual . " ";
1353}
1354
1355sub create_parameterlist($$$$) {
1356 my $args = shift;
1357 my $splitter = shift;
1358 my $file = shift;
1359 my $declaration_name = shift;
1360 my $type;
1361 my $param;
1362
1363 # temporarily replace commas inside function pointer definition
1364 while ($args =~ /(\([^\),]+),/) {
1365 $args =~ s/(\([^\),]+),/$1#/g;
1366 }
1367
1368 foreach my $arg (split($splitter, $args)) {
1369 # strip comments
1370 $arg =~ s/\/\*.*\*\///;
1371 # strip leading/trailing spaces
1372 $arg =~ s/^\s*//;
1373 $arg =~ s/\s*$//;
1374 $arg =~ s/\s+/ /;
1375
1376 if ($arg =~ /^#/) {
1377 # Treat preprocessor directive as a typeless variable just to fill
1378 # corresponding data structures "correctly". Catch it later in
1379 # output_* subs.
1380 push_parameter($arg, "", $file);
1381 } elsif ($arg =~ m/\(.+\)\s*\(/) {
1382 # pointer-to-function
1383 $arg =~ tr/#/,/;
1384 $arg =~ m/[^\(]+\(\*?\s*([\w\.]*)\s*\)/;
1385 $param = $1;
1386 $type = $arg;
1387 $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1388 save_struct_actual($param);
1389 push_parameter($param, $type, $file, $declaration_name);
1390 } elsif ($arg) {
1391 $arg =~ s/\s*:\s*/:/g;
1392 $arg =~ s/\s*\[/\[/g;
1393
1394 my @args = split('\s*,\s*', $arg);
1395 if ($args[0] =~ m/\*/) {
1396 $args[0] =~ s/(\*+)\s*/ $1/;
1397 }
1398
1399 my @first_arg;
1400 if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
1401 shift @args;
1402 push(@first_arg, split('\s+', $1));
1403 push(@first_arg, $2);
1404 } else {
1405 @first_arg = split('\s+', shift @args);
1406 }
1407
1408 unshift(@args, pop @first_arg);
1409 $type = join " ", @first_arg;
1410
1411 foreach $param (@args) {
1412 if ($param =~ m/^(\*+)\s*(.*)/) {
1413 save_struct_actual($2);
1414 push_parameter($2, "$type $1", $file, $declaration_name);
1415 }
1416 elsif ($param =~ m/(.*?):(\d+)/) {
1417 if ($type ne "") { # skip unnamed bit-fields
1418 save_struct_actual($1);
1419 push_parameter($1, "$type:$2", $file, $declaration_name)
1420 }
1421 }
1422 else {
1423 save_struct_actual($param);
1424 push_parameter($param, $type, $file, $declaration_name);
1425 }
1426 }
1427 }
1428 }
1429}
1430
1431sub push_parameter($$$$) {
1432 my $param = shift;
1433 my $type = shift;
1434 my $file = shift;
1435 my $declaration_name = shift;
1436
1437 if (($anon_struct_union == 1) && ($type eq "") &&
1438 ($param eq "}")) {
1439 return; # ignore the ending }; from anon. struct/union
1440 }
1441
1442 $anon_struct_union = 0;
1443 $param =~ s/[\[\)].*//;
1444
1445 if ($type eq "" && $param =~ /\.\.\.$/)
1446 {
1447 if (!$param =~ /\w\.\.\.$/) {
1448 # handles unnamed variable parameters
1449 $param = "...";
1450 }
1451 if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
1452 $parameterdescs{$param} = "variable arguments";
1453 }
1454 }
1455 elsif ($type eq "" && ($param eq "" or $param eq "void"))
1456 {
1457 $param="void";
1458 $parameterdescs{void} = "no arguments";
1459 }
1460 elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
1461 # handle unnamed (anonymous) union or struct:
1462 {
1463 $type = $param;
1464 $param = "{unnamed_" . $param . "}";
1465 $parameterdescs{$param} = "anonymous\n";
1466 $anon_struct_union = 1;
1467 }
1468
1469 # warn if parameter has no description
1470 # (but ignore ones starting with # as these are not parameters
1471 # but inline preprocessor statements);
1472 # Note: It will also ignore void params and unnamed structs/unions
1473 if (!defined $parameterdescs{$param} && $param !~ /^#/) {
1474 $parameterdescs{$param} = $undescribed;
1475
1476 if (show_warnings($type, $declaration_name)) {
1477 print STDERR
1478 "${file}:$.: warning: Function parameter or member '$param' not described in '$declaration_name'\n";
1479 ++$warnings;
1480 }
1481 }
1482
1483 # strip spaces from $param so that it is one continuous string
1484 # on @parameterlist;
1485 # this fixes a problem where check_sections() cannot find
1486 # a parameter like "addr[6 + 2]" because it actually appears
1487 # as "addr[6", "+", "2]" on the parameter list;
1488 # but it's better to maintain the param string unchanged for output,
1489 # so just weaken the string compare in check_sections() to ignore
1490 # "[blah" in a parameter string;
1491 ###$param =~ s/\s*//g;
1492 push @parameterlist, $param;
1493 $type =~ s/\s\s+/ /g;
1494 $parametertypes{$param} = $type;
1495}
1496
1497sub check_sections($$$$$) {
1498 my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck) = @_;
1499 my @sects = split ' ', $sectcheck;
1500 my @prms = split ' ', $prmscheck;
1501 my $err;
1502 my ($px, $sx);
1503 my $prm_clean; # strip trailing "[array size]" and/or beginning "*"
1504
1505 foreach $sx (0 .. $#sects) {
1506 $err = 1;
1507 foreach $px (0 .. $#prms) {
1508 $prm_clean = $prms[$px];
1509 $prm_clean =~ s/\[.*\]//;
1510 $prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
1511 # ignore array size in a parameter string;
1512 # however, the original param string may contain
1513 # spaces, e.g.: addr[6 + 2]
1514 # and this appears in @prms as "addr[6" since the
1515 # parameter list is split at spaces;
1516 # hence just ignore "[..." for the sections check;
1517 $prm_clean =~ s/\[.*//;
1518
1519 ##$prm_clean =~ s/^\**//;
1520 if ($prm_clean eq $sects[$sx]) {
1521 $err = 0;
1522 last;
1523 }
1524 }
1525 if ($err) {
1526 if ($decl_type eq "function") {
1527 print STDERR "${file}:$.: warning: " .
1528 "Excess function parameter " .
1529 "'$sects[$sx]' " .
1530 "description in '$decl_name'\n";
1531 ++$warnings;
1532 }
1533 }
1534 }
1535}
1536
1537##
1538# Checks the section describing the return value of a function.
1539sub check_return_section {
1540 my $file = shift;
1541 my $declaration_name = shift;
1542 my $return_type = shift;
1543
1544 # Ignore an empty return type (It's a macro)
1545 # Ignore functions with a "void" return type. (But don't ignore "void *")
1546 if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
1547 return;
1548 }
1549
1550 if (!defined($sections{$section_return}) ||
1551 $sections{$section_return} eq "") {
1552 print STDERR "${file}:$.: warning: " .
1553 "No description found for return value of " .
1554 "'$declaration_name'\n";
1555 ++$warnings;
1556 }
1557}
1558
1559##
1560# takes a function prototype and the name of the current file being
1561# processed and spits out all the details stored in the global
1562# arrays/hashes.
1563sub dump_function($$) {
1564 my $prototype = shift;
1565 my $file = shift;
1566 my $noret = 0;
1567
1568 $prototype =~ s/^static +//;
1569 $prototype =~ s/^extern +//;
1570 $prototype =~ s/^asmlinkage +//;
1571 $prototype =~ s/^inline +//;
1572 $prototype =~ s/^__inline__ +//;
1573 $prototype =~ s/^__inline +//;
1574 $prototype =~ s/^__always_inline +//;
1575 $prototype =~ s/^noinline +//;
1576 $prototype =~ s/__init +//;
1577 $prototype =~ s/__init_or_module +//;
1578 $prototype =~ s/__meminit +//;
1579 $prototype =~ s/__must_check +//;
1580 $prototype =~ s/__weak +//;
1581 $prototype =~ s/__sched +//;
1582 my $define = $prototype =~ s/^#\s*define\s+//; #ak added
1583 $prototype =~ s/__attribute__\s*\(\(
1584 (?:
1585 [\w\s]++ # attribute name
1586 (?:\([^)]*+\))? # attribute arguments
1587 \s*+,? # optional comma at the end
1588 )+
1589 \)\)\s+//x;
1590
1591 # Yes, this truly is vile. We are looking for:
1592 # 1. Return type (may be nothing if we're looking at a macro)
1593 # 2. Function name
1594 # 3. Function parameters.
1595 #
1596 # All the while we have to watch out for function pointer parameters
1597 # (which IIRC is what the two sections are for), C types (these
1598 # regexps don't even start to express all the possibilities), and
1599 # so on.
1600 #
1601 # If you mess with these regexps, it's a good idea to check that
1602 # the following functions' documentation still comes out right:
1603 # - parport_register_device (function pointer parameters)
1604 # - atomic_set (macro)
1605 # - pci_match_device, __copy_to_user (long return type)
1606
1607 if ($define && $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s+/) {
1608 # This is an object-like macro, it has no return type and no parameter
1609 # list.
1610 # Function-like macros are not allowed to have spaces between
1611 # declaration_name and opening parenthesis (notice the \s+).
1612 $return_type = $1;
1613 $declaration_name = $2;
1614 $noret = 1;
1615 } elsif ($prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1616 $prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1617 $prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1618 $prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1619 $prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1620 $prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1621 $prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1622 $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1623 $prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1624 $prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1625 $prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1626 $prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1627 $prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1628 $prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1629 $prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1630 $prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1631 $prototype =~ m/^(\w+\s+\w+\s*\*+\s*\w+\s*\*+\s*)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/) {
1632 $return_type = $1;
1633 $declaration_name = $2;
1634 my $args = $3;
1635
1636 create_parameterlist($args, ',', $file, $declaration_name);
1637 } else {
1638 print STDERR "${file}:$.: warning: cannot understand function prototype: '$prototype'\n";
1639 return;
1640 }
1641
1642 my $prms = join " ", @parameterlist;
1643 check_sections($file, $declaration_name, "function", $sectcheck, $prms);
1644
1645 # This check emits a lot of warnings at the moment, because many
1646 # functions don't have a 'Return' doc section. So until the number
1647 # of warnings goes sufficiently down, the check is only performed in
1648 # verbose mode.
1649 # TODO: always perform the check.
1650 if ($verbose && !$noret) {
1651 check_return_section($file, $declaration_name, $return_type);
1652 }
1653
1654 output_declaration($declaration_name,
1655 'function',
1656 {'function' => $declaration_name,
1657 'module' => $modulename,
1658 'functiontype' => $return_type,
1659 'parameterlist' => \@parameterlist,
1660 'parameterdescs' => \%parameterdescs,
1661 'parametertypes' => \%parametertypes,
1662 'sectionlist' => \@sectionlist,
1663 'sections' => \%sections,
1664 'purpose' => $declaration_purpose
1665 });
1666}
1667
1668sub reset_state {
1669 $function = "";
1670 %parameterdescs = ();
1671 %parametertypes = ();
1672 @parameterlist = ();
1673 %sections = ();
1674 @sectionlist = ();
1675 $sectcheck = "";
1676 $struct_actual = "";
1677 $prototype = "";
1678
1679 $state = STATE_NORMAL;
1680 $inline_doc_state = STATE_INLINE_NA;
1681}
1682
1683sub tracepoint_munge($) {
1684 my $file = shift;
1685 my $tracepointname = 0;
1686 my $tracepointargs = 0;
1687
1688 if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
1689 $tracepointname = $1;
1690 }
1691 if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
1692 $tracepointname = $1;
1693 }
1694 if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
1695 $tracepointname = $2;
1696 }
1697 $tracepointname =~ s/^\s+//; #strip leading whitespace
1698 if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
1699 $tracepointargs = $1;
1700 }
1701 if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
1702 print STDERR "${file}:$.: warning: Unrecognized tracepoint format: \n".
1703 "$prototype\n";
1704 } else {
1705 $prototype = "static inline void trace_$tracepointname($tracepointargs)";
1706 }
1707}
1708
1709sub syscall_munge() {
1710 my $void = 0;
1711
1712 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
1713## if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
1714 if ($prototype =~ m/SYSCALL_DEFINE0/) {
1715 $void = 1;
1716## $prototype = "long sys_$1(void)";
1717 }
1718
1719 $prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
1720 if ($prototype =~ m/long (sys_.*?),/) {
1721 $prototype =~ s/,/\(/;
1722 } elsif ($void) {
1723 $prototype =~ s/\)/\(void\)/;
1724 }
1725
1726 # now delete all of the odd-number commas in $prototype
1727 # so that arg types & arg names don't have a comma between them
1728 my $count = 0;
1729 my $len = length($prototype);
1730 if ($void) {
1731 $len = 0; # skip the for-loop
1732 }
1733 for (my $ix = 0; $ix < $len; $ix++) {
1734 if (substr($prototype, $ix, 1) eq ',') {
1735 $count++;
1736 if ($count % 2 == 1) {
1737 substr($prototype, $ix, 1) = ' ';
1738 }
1739 }
1740 }
1741}
1742
1743sub process_proto_function($$) {
1744 my $x = shift;
1745 my $file = shift;
1746
1747 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1748
1749 if ($x =~ m#\s*/\*\s+MACDOC\s*#io || ($x =~ /^#/ && $x !~ /^#\s*define/)) {
1750 # do nothing
1751 }
1752 elsif ($x =~ /([^\{]*)/) {
1753 $prototype .= $1;
1754 }
1755
1756 if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
1757 $prototype =~ s@/\*.*?\*/@@gos; # strip comments.
1758 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1759 $prototype =~ s@^\s+@@gos; # strip leading spaces
1760 if ($prototype =~ /SYSCALL_DEFINE/) {
1761 syscall_munge();
1762 }
1763 if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
1764 $prototype =~ /DEFINE_SINGLE_EVENT/)
1765 {
1766 tracepoint_munge($file);
1767 }
1768 dump_function($prototype, $file);
1769 reset_state();
1770 }
1771}
1772
1773sub process_proto_type($$) {
1774 my $x = shift;
1775 my $file = shift;
1776
1777 $x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1778 $x =~ s@^\s+@@gos; # strip leading spaces
1779 $x =~ s@\s+$@@gos; # strip trailing spaces
1780 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1781
1782 if ($x =~ /^#/) {
1783 # To distinguish preprocessor directive from regular declaration later.
1784 $x .= ";";
1785 }
1786
1787 while (1) {
1788 if ( $x =~ /([^{};]*)([{};])(.*)/ ) {
1789 if( length $prototype ) {
1790 $prototype .= " "
1791 }
1792 $prototype .= $1 . $2;
1793 ($2 eq '{') && $brcount++;
1794 ($2 eq '}') && $brcount--;
1795 if (($2 eq ';') && ($brcount == 0)) {
1796 dump_declaration($prototype, $file);
1797 reset_state();
1798 last;
1799 }
1800 $x = $3;
1801 } else {
1802 $prototype .= $x;
1803 last;
1804 }
1805 }
1806}
1807
1808
1809sub map_filename($) {
1810 my $file;
1811 my ($orig_file) = @_;
1812
1813 if (defined($ENV{'SRCTREE'})) {
1814 $file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
1815 } else {
1816 $file = $orig_file;
1817 }
1818
1819 if (defined($source_map{$file})) {
1820 $file = $source_map{$file};
1821 }
1822
1823 return $file;
1824}
1825
1826sub process_export_file($) {
1827 my ($orig_file) = @_;
1828 my $file = map_filename($orig_file);
1829
1830 if (!open(IN,"<$file")) {
1831 print STDERR "Error: Cannot open file $file\n";
1832 ++$errors;
1833 return;
1834 }
1835
1836 while (<IN>) {
1837 if (/$export_symbol/) {
1838 $function_table{$2} = 1;
1839 }
1840 }
1841
1842 close(IN);
1843}
1844
1845#
1846# Parsers for the various processing states.
1847#
1848# STATE_NORMAL: looking for the /** to begin everything.
1849#
1850sub process_normal() {
1851 if (/$doc_start/o) {
1852 $state = STATE_NAME; # next line is always the function name
1853 $in_doc_sect = 0;
1854 $declaration_start_line = $. + 1;
1855 }
1856}
1857
1858#
1859# STATE_NAME: Looking for the "name - description" line
1860#
1861sub process_name($$) {
1862 my $file = shift;
1863 my $identifier;
1864 my $descr;
1865
1866 if (/$doc_block/o) {
1867 $state = STATE_DOCBLOCK;
1868 $contents = "";
1869 $new_start_line = $. + 1;
1870
1871 if ( $1 eq "" ) {
1872 $section = $section_intro;
1873 } else {
1874 $section = $1;
1875 }
1876 }
1877 elsif (/$doc_decl/o) {
1878 $identifier = $1;
1879 if (/\s*([\w\s]+?)(\(\))?\s*-/) {
1880 $identifier = $1;
1881 }
1882
1883 $state = STATE_BODY;
1884 # if there's no @param blocks need to set up default section
1885 # here
1886 $contents = "";
1887 $section = $section_default;
1888 $new_start_line = $. + 1;
1889 if (/-(.*)/) {
1890 # strip leading/trailing/multiple spaces
1891 $descr= $1;
1892 $descr =~ s/^\s*//;
1893 $descr =~ s/\s*$//;
1894 $descr =~ s/\s+/ /g;
1895 $declaration_purpose = $descr;
1896 $state = STATE_BODY_MAYBE;
1897 } else {
1898 $declaration_purpose = "";
1899 }
1900
1901 if (($declaration_purpose eq "") && $verbose) {
1902 print STDERR "${file}:$.: warning: missing initial short description on line:\n";
1903 print STDERR $_;
1904 ++$warnings;
1905 }
1906
1907 if ($identifier =~ m/^struct/) {
1908 $decl_type = 'struct';
1909 } elsif ($identifier =~ m/^union/) {
1910 $decl_type = 'union';
1911 } elsif ($identifier =~ m/^enum/) {
1912 $decl_type = 'enum';
1913 } elsif ($identifier =~ m/^typedef/) {
1914 $decl_type = 'typedef';
1915 } else {
1916 $decl_type = 'function';
1917 }
1918
1919 if ($verbose) {
1920 print STDERR "${file}:$.: info: Scanning doc for $identifier\n";
1921 }
1922 } else {
1923 print STDERR "${file}:$.: warning: Cannot understand $_ on line $.",
1924 " - I thought it was a doc line\n";
1925 ++$warnings;
1926 $state = STATE_NORMAL;
1927 }
1928}
1929
1930
1931#
1932# STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
1933#
1934sub process_body($$) {
1935 my $file = shift;
1936
1937 if (/$doc_sect/i) { # case insensitive for supported section names
1938 $newsection = $1;
1939 $newcontents = $2;
1940
1941 # map the supported section names to the canonical names
1942 if ($newsection =~ m/^description$/i) {
1943 $newsection = $section_default;
1944 } elsif ($newsection =~ m/^context$/i) {
1945 $newsection = $section_context;
1946 } elsif ($newsection =~ m/^returns?$/i) {
1947 $newsection = $section_return;
1948 } elsif ($newsection =~ m/^\@return$/) {
1949 # special: @return is a section, not a param description
1950 $newsection = $section_return;
1951 }
1952
1953 if (($contents ne "") && ($contents ne "\n")) {
1954 if (!$in_doc_sect && $verbose) {
1955 print STDERR "${file}:$.: warning: contents before sections\n";
1956 ++$warnings;
1957 }
1958 dump_section($file, $section, $contents);
1959 $section = $section_default;
1960 }
1961
1962 $in_doc_sect = 1;
1963 $state = STATE_BODY;
1964 $contents = $newcontents;
1965 $new_start_line = $.;
1966 while (substr($contents, 0, 1) eq " ") {
1967 $contents = substr($contents, 1);
1968 }
1969 if ($contents ne "") {
1970 $contents .= "\n";
1971 }
1972 $section = $newsection;
1973 $leading_space = undef;
1974 } elsif (/$doc_end/) {
1975 if (($contents ne "") && ($contents ne "\n")) {
1976 dump_section($file, $section, $contents);
1977 $section = $section_default;
1978 $contents = "";
1979 }
1980 # look for doc_com + <text> + doc_end:
1981 if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
1982 print STDERR "${file}:$.: warning: suspicious ending line: $_";
1983 ++$warnings;
1984 }
1985
1986 $prototype = "";
1987 $state = STATE_PROTO;
1988 $brcount = 0;
1989 } elsif (/$doc_content/) {
1990 # miguel-style comment kludge, look for blank lines after
1991 # @parameter line to signify start of description
1992 if ($1 eq "") {
1993 if ($section =~ m/^@/ || $section eq $section_context) {
1994 dump_section($file, $section, $contents);
1995 $section = $section_default;
1996 $contents = "";
1997 $new_start_line = $.;
1998 } else {
1999 $contents .= "\n";
2000 }
2001 $state = STATE_BODY;
2002 } elsif ($state == STATE_BODY_MAYBE) {
2003 # Continued declaration purpose
2004 chomp($declaration_purpose);
2005 $declaration_purpose .= " " . $1;
2006 $declaration_purpose =~ s/\s+/ /g;
2007 } else {
2008 my $cont = $1;
2009 if ($section =~ m/^@/ || $section eq $section_context) {
2010 if (!defined $leading_space) {
2011 if ($cont =~ m/^(\s+)/) {
2012 $leading_space = $1;
2013 } else {
2014 $leading_space = "";
2015 }
2016 }
2017 $cont =~ s/^$leading_space//;
2018 }
2019 $contents .= $cont . "\n";
2020 }
2021 } else {
2022 # i dont know - bad line? ignore.
2023 print STDERR "${file}:$.: warning: bad line: $_";
2024 ++$warnings;
2025 }
2026}
2027
2028
2029#
2030# STATE_PROTO: reading a function/whatever prototype.
2031#
2032sub process_proto($$) {
2033 my $file = shift;
2034
2035 if (/$doc_inline_oneline/) {
2036 $section = $1;
2037 $contents = $2;
2038 if ($contents ne "") {
2039 $contents .= "\n";
2040 dump_section($file, $section, $contents);
2041 $section = $section_default;
2042 $contents = "";
2043 }
2044 } elsif (/$doc_inline_start/) {
2045 $state = STATE_INLINE;
2046 $inline_doc_state = STATE_INLINE_NAME;
2047 } elsif ($decl_type eq 'function') {
2048 process_proto_function($_, $file);
2049 } else {
2050 process_proto_type($_, $file);
2051 }
2052}
2053
2054#
2055# STATE_DOCBLOCK: within a DOC: block.
2056#
2057sub process_docblock($$) {
2058 my $file = shift;
2059
2060 if (/$doc_end/) {
2061 dump_doc_section($file, $section, $contents);
2062 $section = $section_default;
2063 $contents = "";
2064 $function = "";
2065 %parameterdescs = ();
2066 %parametertypes = ();
2067 @parameterlist = ();
2068 %sections = ();
2069 @sectionlist = ();
2070 $prototype = "";
2071 $state = STATE_NORMAL;
2072 } elsif (/$doc_content/) {
2073 if ( $1 eq "" ) {
2074 $contents .= $blankline;
2075 } else {
2076 $contents .= $1 . "\n";
2077 }
2078 }
2079}
2080
2081#
2082# STATE_INLINE: docbook comments within a prototype.
2083#
2084sub process_inline($$) {
2085 my $file = shift;
2086
2087 # First line (state 1) needs to be a @parameter
2088 if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
2089 $section = $1;
2090 $contents = $2;
2091 $new_start_line = $.;
2092 if ($contents ne "") {
2093 while (substr($contents, 0, 1) eq " ") {
2094 $contents = substr($contents, 1);
2095 }
2096 $contents .= "\n";
2097 }
2098 $inline_doc_state = STATE_INLINE_TEXT;
2099 # Documentation block end */
2100 } elsif (/$doc_inline_end/) {
2101 if (($contents ne "") && ($contents ne "\n")) {
2102 dump_section($file, $section, $contents);
2103 $section = $section_default;
2104 $contents = "";
2105 }
2106 $state = STATE_PROTO;
2107 $inline_doc_state = STATE_INLINE_NA;
2108 # Regular text
2109 } elsif (/$doc_content/) {
2110 if ($inline_doc_state == STATE_INLINE_TEXT) {
2111 $contents .= $1 . "\n";
2112 # nuke leading blank lines
2113 if ($contents =~ /^\s*$/) {
2114 $contents = "";
2115 }
2116 } elsif ($inline_doc_state == STATE_INLINE_NAME) {
2117 $inline_doc_state = STATE_INLINE_ERROR;
2118 print STDERR "${file}:$.: warning: ";
2119 print STDERR "Incorrect use of kernel-doc format: $_";
2120 ++$warnings;
2121 }
2122 }
2123}
2124
2125
2126sub process_file($) {
2127 my $file;
2128 my $initial_section_counter = $section_counter;
2129 my ($orig_file) = @_;
2130
2131 $file = map_filename($orig_file);
2132
2133 if (!open(IN,"<$file")) {
2134 print STDERR "Error: Cannot open file $file\n";
2135 ++$errors;
2136 return;
2137 }
2138
2139 $. = 1;
2140
2141 $section_counter = 0;
2142 while (<IN>) {
2143 while (s/\\\s*$//) {
2144 $_ .= <IN>;
2145 }
2146 # Replace tabs by spaces
2147 while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
2148 # Hand this line to the appropriate state handler
2149 if ($state == STATE_NORMAL) {
2150 process_normal();
2151 } elsif ($state == STATE_NAME) {
2152 process_name($file, $_);
2153 } elsif ($state == STATE_BODY || $state == STATE_BODY_MAYBE) {
2154 process_body($file, $_);
2155 } elsif ($state == STATE_INLINE) { # scanning for inline parameters
2156 process_inline($file, $_);
2157 } elsif ($state == STATE_PROTO) {
2158 process_proto($file, $_);
2159 } elsif ($state == STATE_DOCBLOCK) {
2160 process_docblock($file, $_);
2161 }
2162 }
2163
2164 # Make sure we got something interesting.
2165 if ($initial_section_counter == $section_counter) {
2166 if ($output_mode ne "none") {
2167 print STDERR "${file}:1: warning: no structured comments found\n";
2168 }
2169 if (($output_selection == OUTPUT_INCLUDE) && ($show_not_found == 1)) {
2170 print STDERR " Was looking for '$_'.\n" for keys %function_table;
2171 }
2172 }
2173}
2174
2175
2176$kernelversion = get_kernel_version();
2177
2178# generate a sequence of code that will splice in highlighting information
2179# using the s// operator.
2180for (my $k = 0; $k < @highlights; $k++) {
2181 my $pattern = $highlights[$k][0];
2182 my $result = $highlights[$k][1];
2183# print STDERR "scanning pattern:$pattern, highlight:($result)\n";
2184 $dohighlight .= "\$contents =~ s:$pattern:$result:gs;\n";
2185}
2186
2187# Read the file that maps relative names to absolute names for
2188# separate source and object directories and for shadow trees.
2189if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
2190 my ($relname, $absname);
2191 while(<SOURCE_MAP>) {
2192 chop();
2193 ($relname, $absname) = (split())[0..1];
2194 $relname =~ s:^/+::;
2195 $source_map{$relname} = $absname;
2196 }
2197 close(SOURCE_MAP);
2198}
2199
2200if ($output_selection == OUTPUT_EXPORTED ||
2201 $output_selection == OUTPUT_INTERNAL) {
2202
2203 push(@export_file_list, @ARGV);
2204
2205 foreach (@export_file_list) {
2206 chomp;
2207 process_export_file($_);
2208 }
2209}
2210
2211foreach (@ARGV) {
2212 chomp;
2213 process_file($_);
2214}
2215if ($verbose && $errors) {
2216 print STDERR "$errors errors\n";
2217}
2218if ($verbose && $warnings) {
2219 print STDERR "$warnings warnings\n";
2220}
2221
2222exit($output_mode eq "none" ? 0 : $errors);
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3
4use warnings;
5use strict;
6
7## Copyright (c) 1998 Michael Zucchi, All Rights Reserved ##
8## Copyright (C) 2000, 1 Tim Waugh <twaugh@redhat.com> ##
9## Copyright (C) 2001 Simon Huggins ##
10## Copyright (C) 2005-2012 Randy Dunlap ##
11## Copyright (C) 2012 Dan Luedtke ##
12## ##
13## #define enhancements by Armin Kuster <akuster@mvista.com> ##
14## Copyright (c) 2000 MontaVista Software, Inc. ##
15## ##
16## This software falls under the GNU General Public License. ##
17## Please read the COPYING file for more information ##
18
19# 18/01/2001 - Cleanups
20# Functions prototyped as foo(void) same as foo()
21# Stop eval'ing where we don't need to.
22# -- huggie@earth.li
23
24# 27/06/2001 - Allowed whitespace after initial "/**" and
25# allowed comments before function declarations.
26# -- Christian Kreibich <ck@whoop.org>
27
28# Still to do:
29# - add perldoc documentation
30# - Look more closely at some of the scarier bits :)
31
32# 26/05/2001 - Support for separate source and object trees.
33# Return error code.
34# Keith Owens <kaos@ocs.com.au>
35
36# 23/09/2001 - Added support for typedefs, structs, enums and unions
37# Support for Context section; can be terminated using empty line
38# Small fixes (like spaces vs. \s in regex)
39# -- Tim Jansen <tim@tjansen.de>
40
41# 25/07/2012 - Added support for HTML5
42# -- Dan Luedtke <mail@danrl.de>
43
44sub usage {
45 my $message = <<"EOF";
46Usage: $0 [OPTION ...] FILE ...
47
48Read C language source or header FILEs, extract embedded documentation comments,
49and print formatted documentation to standard output.
50
51The documentation comments are identified by "/**" opening comment mark. See
52Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
53
54Output format selection (mutually exclusive):
55 -man Output troff manual page format. This is the default.
56 -rst Output reStructuredText format.
57 -none Do not output documentation, only warnings.
58
59Output format selection modifier (affects only ReST output):
60
61 -sphinx-version Use the ReST C domain dialect compatible with an
62 specific Sphinx Version.
63 If not specified, kernel-doc will auto-detect using
64 the sphinx-build version found on PATH.
65
66Output selection (mutually exclusive):
67 -export Only output documentation for symbols that have been
68 exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
69 in any input FILE or -export-file FILE.
70 -internal Only output documentation for symbols that have NOT been
71 exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
72 in any input FILE or -export-file FILE.
73 -function NAME Only output documentation for the given function(s)
74 or DOC: section title(s). All other functions and DOC:
75 sections are ignored. May be specified multiple times.
76 -nosymbol NAME Exclude the specified symbols from the output
77 documentation. May be specified multiple times.
78
79Output selection modifiers:
80 -no-doc-sections Do not output DOC: sections.
81 -enable-lineno Enable output of #define LINENO lines. Only works with
82 reStructuredText format.
83 -export-file FILE Specify an additional FILE in which to look for
84 EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
85 -export or -internal. May be specified multiple times.
86
87Other parameters:
88 -v Verbose output, more warnings and other information.
89 -h Print this help.
90 -Werror Treat warnings as errors.
91
92EOF
93 print $message;
94 exit 1;
95}
96
97#
98# format of comments.
99# In the following table, (...)? signifies optional structure.
100# (...)* signifies 0 or more structure elements
101# /**
102# * function_name(:)? (- short description)?
103# (* @parameterx: (description of parameter x)?)*
104# (* a blank line)?
105# * (Description:)? (Description of function)?
106# * (section header: (section description)? )*
107# (*)?*/
108#
109# So .. the trivial example would be:
110#
111# /**
112# * my_function
113# */
114#
115# If the Description: header tag is omitted, then there must be a blank line
116# after the last parameter specification.
117# e.g.
118# /**
119# * my_function - does my stuff
120# * @my_arg: its mine damnit
121# *
122# * Does my stuff explained.
123# */
124#
125# or, could also use:
126# /**
127# * my_function - does my stuff
128# * @my_arg: its mine damnit
129# * Description: Does my stuff explained.
130# */
131# etc.
132#
133# Besides functions you can also write documentation for structs, unions,
134# enums and typedefs. Instead of the function name you must write the name
135# of the declaration; the struct/union/enum/typedef must always precede
136# the name. Nesting of declarations is not supported.
137# Use the argument mechanism to document members or constants.
138# e.g.
139# /**
140# * struct my_struct - short description
141# * @a: first member
142# * @b: second member
143# *
144# * Longer description
145# */
146# struct my_struct {
147# int a;
148# int b;
149# /* private: */
150# int c;
151# };
152#
153# All descriptions can be multiline, except the short function description.
154#
155# For really longs structs, you can also describe arguments inside the
156# body of the struct.
157# eg.
158# /**
159# * struct my_struct - short description
160# * @a: first member
161# * @b: second member
162# *
163# * Longer description
164# */
165# struct my_struct {
166# int a;
167# int b;
168# /**
169# * @c: This is longer description of C
170# *
171# * You can use paragraphs to describe arguments
172# * using this method.
173# */
174# int c;
175# };
176#
177# This should be use only for struct/enum members.
178#
179# You can also add additional sections. When documenting kernel functions you
180# should document the "Context:" of the function, e.g. whether the functions
181# can be called form interrupts. Unlike other sections you can end it with an
182# empty line.
183# A non-void function should have a "Return:" section describing the return
184# value(s).
185# Example-sections should contain the string EXAMPLE so that they are marked
186# appropriately in DocBook.
187#
188# Example:
189# /**
190# * user_function - function that can only be called in user context
191# * @a: some argument
192# * Context: !in_interrupt()
193# *
194# * Some description
195# * Example:
196# * user_function(22);
197# */
198# ...
199#
200#
201# All descriptive text is further processed, scanning for the following special
202# patterns, which are highlighted appropriately.
203#
204# 'funcname()' - function
205# '$ENVVAR' - environmental variable
206# '&struct_name' - name of a structure (up to two words including 'struct')
207# '&struct_name.member' - name of a structure member
208# '@parameter' - name of a parameter
209# '%CONST' - name of a constant.
210# '``LITERAL``' - literal string without any spaces on it.
211
212## init lots of data
213
214my $errors = 0;
215my $warnings = 0;
216my $anon_struct_union = 0;
217
218# match expressions used to find embedded type information
219my $type_constant = '\b``([^\`]+)``\b';
220my $type_constant2 = '\%([-_\w]+)';
221my $type_func = '(\w+)\(\)';
222my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
223my $type_param_ref = '([\!]?)\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
224my $type_fp_param = '\@(\w+)\(\)'; # Special RST handling for func ptr params
225my $type_fp_param2 = '\@(\w+->\S+)\(\)'; # Special RST handling for structs with func ptr params
226my $type_env = '(\$\w+)';
227my $type_enum = '\&(enum\s*([_\w]+))';
228my $type_struct = '\&(struct\s*([_\w]+))';
229my $type_typedef = '\&(typedef\s*([_\w]+))';
230my $type_union = '\&(union\s*([_\w]+))';
231my $type_member = '\&([_\w]+)(\.|->)([_\w]+)';
232my $type_fallback = '\&([_\w]+)';
233my $type_member_func = $type_member . '\(\)';
234
235# Output conversion substitutions.
236# One for each output format
237
238# these are pretty rough
239my @highlights_man = (
240 [$type_constant, "\$1"],
241 [$type_constant2, "\$1"],
242 [$type_func, "\\\\fB\$1\\\\fP"],
243 [$type_enum, "\\\\fI\$1\\\\fP"],
244 [$type_struct, "\\\\fI\$1\\\\fP"],
245 [$type_typedef, "\\\\fI\$1\\\\fP"],
246 [$type_union, "\\\\fI\$1\\\\fP"],
247 [$type_param, "\\\\fI\$1\\\\fP"],
248 [$type_param_ref, "\\\\fI\$1\$2\\\\fP"],
249 [$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
250 [$type_fallback, "\\\\fI\$1\\\\fP"]
251 );
252my $blankline_man = "";
253
254# rst-mode
255my @highlights_rst = (
256 [$type_constant, "``\$1``"],
257 [$type_constant2, "``\$1``"],
258 # Note: need to escape () to avoid func matching later
259 [$type_member_func, "\\:c\\:type\\:`\$1\$2\$3\\\\(\\\\) <\$1>`"],
260 [$type_member, "\\:c\\:type\\:`\$1\$2\$3 <\$1>`"],
261 [$type_fp_param, "**\$1\\\\(\\\\)**"],
262 [$type_fp_param2, "**\$1\\\\(\\\\)**"],
263 [$type_func, "\$1()"],
264 [$type_enum, "\\:c\\:type\\:`\$1 <\$2>`"],
265 [$type_struct, "\\:c\\:type\\:`\$1 <\$2>`"],
266 [$type_typedef, "\\:c\\:type\\:`\$1 <\$2>`"],
267 [$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
268 # in rst this can refer to any type
269 [$type_fallback, "\\:c\\:type\\:`\$1`"],
270 [$type_param_ref, "**\$1\$2**"]
271 );
272my $blankline_rst = "\n";
273
274# read arguments
275if ($#ARGV == -1) {
276 usage();
277}
278
279my $kernelversion;
280my ($sphinx_major, $sphinx_minor, $sphinx_patch);
281
282my $dohighlight = "";
283
284my $verbose = 0;
285my $Werror = 0;
286my $output_mode = "rst";
287my $output_preformatted = 0;
288my $no_doc_sections = 0;
289my $enable_lineno = 0;
290my @highlights = @highlights_rst;
291my $blankline = $blankline_rst;
292my $modulename = "Kernel API";
293
294use constant {
295 OUTPUT_ALL => 0, # output all symbols and doc sections
296 OUTPUT_INCLUDE => 1, # output only specified symbols
297 OUTPUT_EXPORTED => 2, # output exported symbols
298 OUTPUT_INTERNAL => 3, # output non-exported symbols
299};
300my $output_selection = OUTPUT_ALL;
301my $show_not_found = 0; # No longer used
302
303my @export_file_list;
304
305my @build_time;
306if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
307 (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
308 @build_time = gmtime($seconds);
309} else {
310 @build_time = localtime;
311}
312
313my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
314 'July', 'August', 'September', 'October',
315 'November', 'December')[$build_time[4]] .
316 " " . ($build_time[5]+1900);
317
318# Essentially these are globals.
319# They probably want to be tidied up, made more localised or something.
320# CAVEAT EMPTOR! Some of the others I localised may not want to be, which
321# could cause "use of undefined value" or other bugs.
322my ($function, %function_table, %parametertypes, $declaration_purpose);
323my %nosymbol_table = ();
324my $declaration_start_line;
325my ($type, $declaration_name, $return_type);
326my ($newsection, $newcontents, $prototype, $brcount, %source_map);
327
328if (defined($ENV{'KBUILD_VERBOSE'})) {
329 $verbose = "$ENV{'KBUILD_VERBOSE'}";
330}
331
332if (defined($ENV{'KDOC_WERROR'})) {
333 $Werror = "$ENV{'KDOC_WERROR'}";
334}
335
336if (defined($ENV{'KCFLAGS'})) {
337 my $kcflags = "$ENV{'KCFLAGS'}";
338
339 if ($kcflags =~ /Werror/) {
340 $Werror = 1;
341 }
342}
343
344# Generated docbook code is inserted in a template at a point where
345# docbook v3.1 requires a non-zero sequence of RefEntry's; see:
346# https://www.oasis-open.org/docbook/documentation/reference/html/refentry.html
347# We keep track of number of generated entries and generate a dummy
348# if needs be to ensure the expanded template can be postprocessed
349# into html.
350my $section_counter = 0;
351
352my $lineprefix="";
353
354# Parser states
355use constant {
356 STATE_NORMAL => 0, # normal code
357 STATE_NAME => 1, # looking for function name
358 STATE_BODY_MAYBE => 2, # body - or maybe more description
359 STATE_BODY => 3, # the body of the comment
360 STATE_BODY_WITH_BLANK_LINE => 4, # the body, which has a blank line
361 STATE_PROTO => 5, # scanning prototype
362 STATE_DOCBLOCK => 6, # documentation block
363 STATE_INLINE => 7, # gathering doc outside main block
364};
365my $state;
366my $in_doc_sect;
367my $leading_space;
368
369# Inline documentation state
370use constant {
371 STATE_INLINE_NA => 0, # not applicable ($state != STATE_INLINE)
372 STATE_INLINE_NAME => 1, # looking for member name (@foo:)
373 STATE_INLINE_TEXT => 2, # looking for member documentation
374 STATE_INLINE_END => 3, # done
375 STATE_INLINE_ERROR => 4, # error - Comment without header was found.
376 # Spit a warning as it's not
377 # proper kernel-doc and ignore the rest.
378};
379my $inline_doc_state;
380
381#declaration types: can be
382# 'function', 'struct', 'union', 'enum', 'typedef'
383my $decl_type;
384
385# Name of the kernel-doc identifier for non-DOC markups
386my $identifier;
387
388my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
389my $doc_end = '\*/';
390my $doc_com = '\s*\*\s*';
391my $doc_com_body = '\s*\* ?';
392my $doc_decl = $doc_com . '(\w+)';
393# @params and a strictly limited set of supported section names
394# Specifically:
395# Match @word:
396# @...:
397# @{section-name}:
398# while trying to not match literal block starts like "example::"
399#
400my $doc_sect = $doc_com .
401 '\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:([^:].*)?$';
402my $doc_content = $doc_com_body . '(.*)';
403my $doc_block = $doc_com . 'DOC:\s*(.*)?';
404my $doc_inline_start = '^\s*/\*\*\s*$';
405my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
406my $doc_inline_end = '^\s*\*/\s*$';
407my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
408my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
409my $function_pointer = qr{([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)};
410my $attribute = qr{__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)}i;
411
412my %parameterdescs;
413my %parameterdesc_start_lines;
414my @parameterlist;
415my %sections;
416my @sectionlist;
417my %section_start_lines;
418my $sectcheck;
419my $struct_actual;
420
421my $contents = "";
422my $new_start_line = 0;
423
424# the canonical section names. see also $doc_sect above.
425my $section_default = "Description"; # default section
426my $section_intro = "Introduction";
427my $section = $section_default;
428my $section_context = "Context";
429my $section_return = "Return";
430
431my $undescribed = "-- undescribed --";
432
433reset_state();
434
435while ($ARGV[0] =~ m/^--?(.*)/) {
436 my $cmd = $1;
437 shift @ARGV;
438 if ($cmd eq "man") {
439 $output_mode = "man";
440 @highlights = @highlights_man;
441 $blankline = $blankline_man;
442 } elsif ($cmd eq "rst") {
443 $output_mode = "rst";
444 @highlights = @highlights_rst;
445 $blankline = $blankline_rst;
446 } elsif ($cmd eq "none") {
447 $output_mode = "none";
448 } elsif ($cmd eq "module") { # not needed for XML, inherits from calling document
449 $modulename = shift @ARGV;
450 } elsif ($cmd eq "function") { # to only output specific functions
451 $output_selection = OUTPUT_INCLUDE;
452 $function = shift @ARGV;
453 $function_table{$function} = 1;
454 } elsif ($cmd eq "nosymbol") { # Exclude specific symbols
455 my $symbol = shift @ARGV;
456 $nosymbol_table{$symbol} = 1;
457 } elsif ($cmd eq "export") { # only exported symbols
458 $output_selection = OUTPUT_EXPORTED;
459 %function_table = ();
460 } elsif ($cmd eq "internal") { # only non-exported symbols
461 $output_selection = OUTPUT_INTERNAL;
462 %function_table = ();
463 } elsif ($cmd eq "export-file") {
464 my $file = shift @ARGV;
465 push(@export_file_list, $file);
466 } elsif ($cmd eq "v") {
467 $verbose = 1;
468 } elsif ($cmd eq "Werror") {
469 $Werror = 1;
470 } elsif (($cmd eq "h") || ($cmd eq "help")) {
471 usage();
472 } elsif ($cmd eq 'no-doc-sections') {
473 $no_doc_sections = 1;
474 } elsif ($cmd eq 'enable-lineno') {
475 $enable_lineno = 1;
476 } elsif ($cmd eq 'show-not-found') {
477 $show_not_found = 1; # A no-op but don't fail
478 } elsif ($cmd eq "sphinx-version") {
479 my $ver_string = shift @ARGV;
480 if ($ver_string =~ m/^(\d+)(\.\d+)?(\.\d+)?/) {
481 $sphinx_major = $1;
482 if (defined($2)) {
483 $sphinx_minor = substr($2,1);
484 } else {
485 $sphinx_minor = 0;
486 }
487 if (defined($3)) {
488 $sphinx_patch = substr($3,1)
489 } else {
490 $sphinx_patch = 0;
491 }
492 } else {
493 die "Sphinx version should either major.minor or major.minor.patch format\n";
494 }
495 } else {
496 # Unknown argument
497 usage();
498 }
499}
500
501# continue execution near EOF;
502
503# The C domain dialect changed on Sphinx 3. So, we need to check the
504# version in order to produce the right tags.
505sub findprog($)
506{
507 foreach(split(/:/, $ENV{PATH})) {
508 return "$_/$_[0]" if(-x "$_/$_[0]");
509 }
510}
511
512sub get_sphinx_version()
513{
514 my $ver;
515
516 my $cmd = "sphinx-build";
517 if (!findprog($cmd)) {
518 my $cmd = "sphinx-build3";
519 if (!findprog($cmd)) {
520 $sphinx_major = 1;
521 $sphinx_minor = 2;
522 $sphinx_patch = 0;
523 printf STDERR "Warning: Sphinx version not found. Using default (Sphinx version %d.%d.%d)\n",
524 $sphinx_major, $sphinx_minor, $sphinx_patch;
525 return;
526 }
527 }
528
529 open IN, "$cmd --version 2>&1 |";
530 while (<IN>) {
531 if (m/^\s*sphinx-build\s+([\d]+)\.([\d\.]+)(\+\/[\da-f]+)?$/) {
532 $sphinx_major = $1;
533 $sphinx_minor = $2;
534 $sphinx_patch = $3;
535 last;
536 }
537 # Sphinx 1.2.x uses a different format
538 if (m/^\s*Sphinx.*\s+([\d]+)\.([\d\.]+)$/) {
539 $sphinx_major = $1;
540 $sphinx_minor = $2;
541 $sphinx_patch = $3;
542 last;
543 }
544 }
545 close IN;
546}
547
548# get kernel version from env
549sub get_kernel_version() {
550 my $version = 'unknown kernel version';
551
552 if (defined($ENV{'KERNELVERSION'})) {
553 $version = $ENV{'KERNELVERSION'};
554 }
555 return $version;
556}
557
558#
559sub print_lineno {
560 my $lineno = shift;
561 if ($enable_lineno && defined($lineno)) {
562 print "#define LINENO " . $lineno . "\n";
563 }
564}
565##
566# dumps section contents to arrays/hashes intended for that purpose.
567#
568sub dump_section {
569 my $file = shift;
570 my $name = shift;
571 my $contents = join "\n", @_;
572
573 if ($name =~ m/$type_param/) {
574 $name = $1;
575 $parameterdescs{$name} = $contents;
576 $sectcheck = $sectcheck . $name . " ";
577 $parameterdesc_start_lines{$name} = $new_start_line;
578 $new_start_line = 0;
579 } elsif ($name eq "@\.\.\.") {
580 $name = "...";
581 $parameterdescs{$name} = $contents;
582 $sectcheck = $sectcheck . $name . " ";
583 $parameterdesc_start_lines{$name} = $new_start_line;
584 $new_start_line = 0;
585 } else {
586 if (defined($sections{$name}) && ($sections{$name} ne "")) {
587 # Only warn on user specified duplicate section names.
588 if ($name ne $section_default) {
589 print STDERR "${file}:$.: warning: duplicate section name '$name'\n";
590 ++$warnings;
591 }
592 $sections{$name} .= $contents;
593 } else {
594 $sections{$name} = $contents;
595 push @sectionlist, $name;
596 $section_start_lines{$name} = $new_start_line;
597 $new_start_line = 0;
598 }
599 }
600}
601
602##
603# dump DOC: section after checking that it should go out
604#
605sub dump_doc_section {
606 my $file = shift;
607 my $name = shift;
608 my $contents = join "\n", @_;
609
610 if ($no_doc_sections) {
611 return;
612 }
613
614 return if (defined($nosymbol_table{$name}));
615
616 if (($output_selection == OUTPUT_ALL) ||
617 (($output_selection == OUTPUT_INCLUDE) &&
618 defined($function_table{$name})))
619 {
620 dump_section($file, $name, $contents);
621 output_blockhead({'sectionlist' => \@sectionlist,
622 'sections' => \%sections,
623 'module' => $modulename,
624 'content-only' => ($output_selection != OUTPUT_ALL), });
625 }
626}
627
628##
629# output function
630#
631# parameterdescs, a hash.
632# function => "function name"
633# parameterlist => @list of parameters
634# parameterdescs => %parameter descriptions
635# sectionlist => @list of sections
636# sections => %section descriptions
637#
638
639sub output_highlight {
640 my $contents = join "\n",@_;
641 my $line;
642
643# DEBUG
644# if (!defined $contents) {
645# use Carp;
646# confess "output_highlight got called with no args?\n";
647# }
648
649# print STDERR "contents b4:$contents\n";
650 eval $dohighlight;
651 die $@ if $@;
652# print STDERR "contents af:$contents\n";
653
654 foreach $line (split "\n", $contents) {
655 if (! $output_preformatted) {
656 $line =~ s/^\s*//;
657 }
658 if ($line eq ""){
659 if (! $output_preformatted) {
660 print $lineprefix, $blankline;
661 }
662 } else {
663 if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
664 print "\\&$line";
665 } else {
666 print $lineprefix, $line;
667 }
668 }
669 print "\n";
670 }
671}
672
673##
674# output function in man
675sub output_function_man(%) {
676 my %args = %{$_[0]};
677 my ($parameter, $section);
678 my $count;
679
680 print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
681
682 print ".SH NAME\n";
683 print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
684
685 print ".SH SYNOPSIS\n";
686 if ($args{'functiontype'} ne "") {
687 print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
688 } else {
689 print ".B \"" . $args{'function'} . "\n";
690 }
691 $count = 0;
692 my $parenth = "(";
693 my $post = ",";
694 foreach my $parameter (@{$args{'parameterlist'}}) {
695 if ($count == $#{$args{'parameterlist'}}) {
696 $post = ");";
697 }
698 $type = $args{'parametertypes'}{$parameter};
699 if ($type =~ m/$function_pointer/) {
700 # pointer-to-function
701 print ".BI \"" . $parenth . $1 . "\" " . " \") (" . $2 . ")" . $post . "\"\n";
702 } else {
703 $type =~ s/([^\*])$/$1 /;
704 print ".BI \"" . $parenth . $type . "\" " . " \"" . $post . "\"\n";
705 }
706 $count++;
707 $parenth = "";
708 }
709
710 print ".SH ARGUMENTS\n";
711 foreach $parameter (@{$args{'parameterlist'}}) {
712 my $parameter_name = $parameter;
713 $parameter_name =~ s/\[.*//;
714
715 print ".IP \"" . $parameter . "\" 12\n";
716 output_highlight($args{'parameterdescs'}{$parameter_name});
717 }
718 foreach $section (@{$args{'sectionlist'}}) {
719 print ".SH \"", uc $section, "\"\n";
720 output_highlight($args{'sections'}{$section});
721 }
722}
723
724##
725# output enum in man
726sub output_enum_man(%) {
727 my %args = %{$_[0]};
728 my ($parameter, $section);
729 my $count;
730
731 print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
732
733 print ".SH NAME\n";
734 print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
735
736 print ".SH SYNOPSIS\n";
737 print "enum " . $args{'enum'} . " {\n";
738 $count = 0;
739 foreach my $parameter (@{$args{'parameterlist'}}) {
740 print ".br\n.BI \" $parameter\"\n";
741 if ($count == $#{$args{'parameterlist'}}) {
742 print "\n};\n";
743 last;
744 }
745 else {
746 print ", \n.br\n";
747 }
748 $count++;
749 }
750
751 print ".SH Constants\n";
752 foreach $parameter (@{$args{'parameterlist'}}) {
753 my $parameter_name = $parameter;
754 $parameter_name =~ s/\[.*//;
755
756 print ".IP \"" . $parameter . "\" 12\n";
757 output_highlight($args{'parameterdescs'}{$parameter_name});
758 }
759 foreach $section (@{$args{'sectionlist'}}) {
760 print ".SH \"$section\"\n";
761 output_highlight($args{'sections'}{$section});
762 }
763}
764
765##
766# output struct in man
767sub output_struct_man(%) {
768 my %args = %{$_[0]};
769 my ($parameter, $section);
770
771 print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
772
773 print ".SH NAME\n";
774 print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
775
776 my $declaration = $args{'definition'};
777 $declaration =~ s/\t/ /g;
778 $declaration =~ s/\n/"\n.br\n.BI \"/g;
779 print ".SH SYNOPSIS\n";
780 print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
781 print ".BI \"$declaration\n};\n.br\n\n";
782
783 print ".SH Members\n";
784 foreach $parameter (@{$args{'parameterlist'}}) {
785 ($parameter =~ /^#/) && next;
786
787 my $parameter_name = $parameter;
788 $parameter_name =~ s/\[.*//;
789
790 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
791 print ".IP \"" . $parameter . "\" 12\n";
792 output_highlight($args{'parameterdescs'}{$parameter_name});
793 }
794 foreach $section (@{$args{'sectionlist'}}) {
795 print ".SH \"$section\"\n";
796 output_highlight($args{'sections'}{$section});
797 }
798}
799
800##
801# output typedef in man
802sub output_typedef_man(%) {
803 my %args = %{$_[0]};
804 my ($parameter, $section);
805
806 print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
807
808 print ".SH NAME\n";
809 print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
810
811 foreach $section (@{$args{'sectionlist'}}) {
812 print ".SH \"$section\"\n";
813 output_highlight($args{'sections'}{$section});
814 }
815}
816
817sub output_blockhead_man(%) {
818 my %args = %{$_[0]};
819 my ($parameter, $section);
820 my $count;
821
822 print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
823
824 foreach $section (@{$args{'sectionlist'}}) {
825 print ".SH \"$section\"\n";
826 output_highlight($args{'sections'}{$section});
827 }
828}
829
830##
831# output in restructured text
832#
833
834#
835# This could use some work; it's used to output the DOC: sections, and
836# starts by putting out the name of the doc section itself, but that tends
837# to duplicate a header already in the template file.
838#
839sub output_blockhead_rst(%) {
840 my %args = %{$_[0]};
841 my ($parameter, $section);
842
843 foreach $section (@{$args{'sectionlist'}}) {
844 next if (defined($nosymbol_table{$section}));
845
846 if ($output_selection != OUTPUT_INCLUDE) {
847 print ".. _$section:\n\n";
848 print "**$section**\n\n";
849 }
850 print_lineno($section_start_lines{$section});
851 output_highlight_rst($args{'sections'}{$section});
852 print "\n";
853 }
854}
855
856#
857# Apply the RST highlights to a sub-block of text.
858#
859sub highlight_block($) {
860 # The dohighlight kludge requires the text be called $contents
861 my $contents = shift;
862 eval $dohighlight;
863 die $@ if $@;
864 return $contents;
865}
866
867#
868# Regexes used only here.
869#
870my $sphinx_literal = '^[^.].*::$';
871my $sphinx_cblock = '^\.\.\ +code-block::';
872
873sub output_highlight_rst {
874 my $input = join "\n",@_;
875 my $output = "";
876 my $line;
877 my $in_literal = 0;
878 my $litprefix;
879 my $block = "";
880
881 foreach $line (split "\n",$input) {
882 #
883 # If we're in a literal block, see if we should drop out
884 # of it. Otherwise pass the line straight through unmunged.
885 #
886 if ($in_literal) {
887 if (! ($line =~ /^\s*$/)) {
888 #
889 # If this is the first non-blank line in a literal
890 # block we need to figure out what the proper indent is.
891 #
892 if ($litprefix eq "") {
893 $line =~ /^(\s*)/;
894 $litprefix = '^' . $1;
895 $output .= $line . "\n";
896 } elsif (! ($line =~ /$litprefix/)) {
897 $in_literal = 0;
898 } else {
899 $output .= $line . "\n";
900 }
901 } else {
902 $output .= $line . "\n";
903 }
904 }
905 #
906 # Not in a literal block (or just dropped out)
907 #
908 if (! $in_literal) {
909 $block .= $line . "\n";
910 if (($line =~ /$sphinx_literal/) || ($line =~ /$sphinx_cblock/)) {
911 $in_literal = 1;
912 $litprefix = "";
913 $output .= highlight_block($block);
914 $block = ""
915 }
916 }
917 }
918
919 if ($block) {
920 $output .= highlight_block($block);
921 }
922 foreach $line (split "\n", $output) {
923 print $lineprefix . $line . "\n";
924 }
925}
926
927sub output_function_rst(%) {
928 my %args = %{$_[0]};
929 my ($parameter, $section);
930 my $oldprefix = $lineprefix;
931 my $start = "";
932 my $is_macro = 0;
933
934 if ($sphinx_major < 3) {
935 if ($args{'typedef'}) {
936 print ".. c:type:: ". $args{'function'} . "\n\n";
937 print_lineno($declaration_start_line);
938 print " **Typedef**: ";
939 $lineprefix = "";
940 output_highlight_rst($args{'purpose'});
941 $start = "\n\n**Syntax**\n\n ``";
942 $is_macro = 1;
943 } else {
944 print ".. c:function:: ";
945 }
946 } else {
947 if ($args{'typedef'} || $args{'functiontype'} eq "") {
948 $is_macro = 1;
949 print ".. c:macro:: ". $args{'function'} . "\n\n";
950 } else {
951 print ".. c:function:: ";
952 }
953
954 if ($args{'typedef'}) {
955 print_lineno($declaration_start_line);
956 print " **Typedef**: ";
957 $lineprefix = "";
958 output_highlight_rst($args{'purpose'});
959 $start = "\n\n**Syntax**\n\n ``";
960 } else {
961 print "``" if ($is_macro);
962 }
963 }
964 if ($args{'functiontype'} ne "") {
965 $start .= $args{'functiontype'} . " " . $args{'function'} . " (";
966 } else {
967 $start .= $args{'function'} . " (";
968 }
969 print $start;
970
971 my $count = 0;
972 foreach my $parameter (@{$args{'parameterlist'}}) {
973 if ($count ne 0) {
974 print ", ";
975 }
976 $count++;
977 $type = $args{'parametertypes'}{$parameter};
978
979 if ($type =~ m/$function_pointer/) {
980 # pointer-to-function
981 print $1 . $parameter . ") (" . $2 . ")";
982 } else {
983 print $type;
984 }
985 }
986 if ($is_macro) {
987 print ")``\n\n";
988 } else {
989 print ")\n\n";
990 }
991 if (!$args{'typedef'}) {
992 print_lineno($declaration_start_line);
993 $lineprefix = " ";
994 output_highlight_rst($args{'purpose'});
995 print "\n";
996 }
997
998 print "**Parameters**\n\n";
999 $lineprefix = " ";
1000 foreach $parameter (@{$args{'parameterlist'}}) {
1001 my $parameter_name = $parameter;
1002 $parameter_name =~ s/\[.*//;
1003 $type = $args{'parametertypes'}{$parameter};
1004
1005 if ($type ne "") {
1006 print "``$type``\n";
1007 } else {
1008 print "``$parameter``\n";
1009 }
1010
1011 print_lineno($parameterdesc_start_lines{$parameter_name});
1012
1013 if (defined($args{'parameterdescs'}{$parameter_name}) &&
1014 $args{'parameterdescs'}{$parameter_name} ne $undescribed) {
1015 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
1016 } else {
1017 print " *undescribed*\n";
1018 }
1019 print "\n";
1020 }
1021
1022 $lineprefix = $oldprefix;
1023 output_section_rst(@_);
1024}
1025
1026sub output_section_rst(%) {
1027 my %args = %{$_[0]};
1028 my $section;
1029 my $oldprefix = $lineprefix;
1030 $lineprefix = "";
1031
1032 foreach $section (@{$args{'sectionlist'}}) {
1033 print "**$section**\n\n";
1034 print_lineno($section_start_lines{$section});
1035 output_highlight_rst($args{'sections'}{$section});
1036 print "\n";
1037 }
1038 print "\n";
1039 $lineprefix = $oldprefix;
1040}
1041
1042sub output_enum_rst(%) {
1043 my %args = %{$_[0]};
1044 my ($parameter);
1045 my $oldprefix = $lineprefix;
1046 my $count;
1047
1048 if ($sphinx_major < 3) {
1049 my $name = "enum " . $args{'enum'};
1050 print "\n\n.. c:type:: " . $name . "\n\n";
1051 } else {
1052 my $name = $args{'enum'};
1053 print "\n\n.. c:enum:: " . $name . "\n\n";
1054 }
1055 print_lineno($declaration_start_line);
1056 $lineprefix = " ";
1057 output_highlight_rst($args{'purpose'});
1058 print "\n";
1059
1060 print "**Constants**\n\n";
1061 $lineprefix = " ";
1062 foreach $parameter (@{$args{'parameterlist'}}) {
1063 print "``$parameter``\n";
1064 if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
1065 output_highlight_rst($args{'parameterdescs'}{$parameter});
1066 } else {
1067 print " *undescribed*\n";
1068 }
1069 print "\n";
1070 }
1071
1072 $lineprefix = $oldprefix;
1073 output_section_rst(@_);
1074}
1075
1076sub output_typedef_rst(%) {
1077 my %args = %{$_[0]};
1078 my ($parameter);
1079 my $oldprefix = $lineprefix;
1080 my $name;
1081
1082 if ($sphinx_major < 3) {
1083 $name = "typedef " . $args{'typedef'};
1084 } else {
1085 $name = $args{'typedef'};
1086 }
1087 print "\n\n.. c:type:: " . $name . "\n\n";
1088 print_lineno($declaration_start_line);
1089 $lineprefix = " ";
1090 output_highlight_rst($args{'purpose'});
1091 print "\n";
1092
1093 $lineprefix = $oldprefix;
1094 output_section_rst(@_);
1095}
1096
1097sub output_struct_rst(%) {
1098 my %args = %{$_[0]};
1099 my ($parameter);
1100 my $oldprefix = $lineprefix;
1101
1102 if ($sphinx_major < 3) {
1103 my $name = $args{'type'} . " " . $args{'struct'};
1104 print "\n\n.. c:type:: " . $name . "\n\n";
1105 } else {
1106 my $name = $args{'struct'};
1107 if ($args{'type'} eq 'union') {
1108 print "\n\n.. c:union:: " . $name . "\n\n";
1109 } else {
1110 print "\n\n.. c:struct:: " . $name . "\n\n";
1111 }
1112 }
1113 print_lineno($declaration_start_line);
1114 $lineprefix = " ";
1115 output_highlight_rst($args{'purpose'});
1116 print "\n";
1117
1118 print "**Definition**\n\n";
1119 print "::\n\n";
1120 my $declaration = $args{'definition'};
1121 $declaration =~ s/\t/ /g;
1122 print " " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration };\n\n";
1123
1124 print "**Members**\n\n";
1125 $lineprefix = " ";
1126 foreach $parameter (@{$args{'parameterlist'}}) {
1127 ($parameter =~ /^#/) && next;
1128
1129 my $parameter_name = $parameter;
1130 $parameter_name =~ s/\[.*//;
1131
1132 ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
1133 $type = $args{'parametertypes'}{$parameter};
1134 print_lineno($parameterdesc_start_lines{$parameter_name});
1135 print "``" . $parameter . "``\n";
1136 output_highlight_rst($args{'parameterdescs'}{$parameter_name});
1137 print "\n";
1138 }
1139 print "\n";
1140
1141 $lineprefix = $oldprefix;
1142 output_section_rst(@_);
1143}
1144
1145## none mode output functions
1146
1147sub output_function_none(%) {
1148}
1149
1150sub output_enum_none(%) {
1151}
1152
1153sub output_typedef_none(%) {
1154}
1155
1156sub output_struct_none(%) {
1157}
1158
1159sub output_blockhead_none(%) {
1160}
1161
1162##
1163# generic output function for all types (function, struct/union, typedef, enum);
1164# calls the generated, variable output_ function name based on
1165# functype and output_mode
1166sub output_declaration {
1167 no strict 'refs';
1168 my $name = shift;
1169 my $functype = shift;
1170 my $func = "output_${functype}_$output_mode";
1171
1172 return if (defined($nosymbol_table{$name}));
1173
1174 if (($output_selection == OUTPUT_ALL) ||
1175 (($output_selection == OUTPUT_INCLUDE ||
1176 $output_selection == OUTPUT_EXPORTED) &&
1177 defined($function_table{$name})) ||
1178 ($output_selection == OUTPUT_INTERNAL &&
1179 !($functype eq "function" && defined($function_table{$name}))))
1180 {
1181 &$func(@_);
1182 $section_counter++;
1183 }
1184}
1185
1186##
1187# generic output function - calls the right one based on current output mode.
1188sub output_blockhead {
1189 no strict 'refs';
1190 my $func = "output_blockhead_" . $output_mode;
1191 &$func(@_);
1192 $section_counter++;
1193}
1194
1195##
1196# takes a declaration (struct, union, enum, typedef) and
1197# invokes the right handler. NOT called for functions.
1198sub dump_declaration($$) {
1199 no strict 'refs';
1200 my ($prototype, $file) = @_;
1201 my $func = "dump_" . $decl_type;
1202 &$func(@_);
1203}
1204
1205sub dump_union($$) {
1206 dump_struct(@_);
1207}
1208
1209sub dump_struct($$) {
1210 my $x = shift;
1211 my $file = shift;
1212 my $decl_type;
1213 my $members;
1214 my $type = qr{struct|union};
1215 # For capturing struct/union definition body, i.e. "{members*}qualifiers*"
1216 my $qualifiers = qr{$attribute|__packed|__aligned|____cacheline_aligned_in_smp|____cacheline_aligned};
1217 my $definition_body = qr{\{(.*)\}\s*$qualifiers*};
1218 my $struct_members = qr{($type)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;};
1219
1220 if ($x =~ /($type)\s+(\w+)\s*$definition_body/) {
1221 $decl_type = $1;
1222 $declaration_name = $2;
1223 $members = $3;
1224 } elsif ($x =~ /typedef\s+($type)\s*$definition_body\s*(\w+)\s*;/) {
1225 $decl_type = $1;
1226 $declaration_name = $3;
1227 $members = $2;
1228 }
1229
1230 if ($members) {
1231 if ($identifier ne $declaration_name) {
1232 print STDERR "${file}:$.: warning: expecting prototype for $decl_type $identifier. Prototype was for $decl_type $declaration_name instead\n";
1233 return;
1234 }
1235
1236 # ignore members marked private:
1237 $members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1238 $members =~ s/\/\*\s*private:.*//gosi;
1239 # strip comments:
1240 $members =~ s/\/\*.*?\*\///gos;
1241 # strip attributes
1242 $members =~ s/\s*$attribute/ /gi;
1243 $members =~ s/\s*__aligned\s*\([^;]*\)/ /gos;
1244 $members =~ s/\s*__packed\s*/ /gos;
1245 $members =~ s/\s*CRYPTO_MINALIGN_ATTR/ /gos;
1246 $members =~ s/\s*____cacheline_aligned_in_smp/ /gos;
1247 $members =~ s/\s*____cacheline_aligned/ /gos;
1248
1249 my $args = qr{([^,)]+)};
1250 # replace DECLARE_BITMAP
1251 $members =~ s/__ETHTOOL_DECLARE_LINK_MODE_MASK\s*\(([^\)]+)\)/DECLARE_BITMAP($1, __ETHTOOL_LINK_MODE_MASK_NBITS)/gos;
1252 $members =~ s/DECLARE_BITMAP\s*\($args,\s*$args\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
1253 # replace DECLARE_HASHTABLE
1254 $members =~ s/DECLARE_HASHTABLE\s*\($args,\s*$args\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
1255 # replace DECLARE_KFIFO
1256 $members =~ s/DECLARE_KFIFO\s*\($args,\s*$args,\s*$args\)/$2 \*$1/gos;
1257 # replace DECLARE_KFIFO_PTR
1258 $members =~ s/DECLARE_KFIFO_PTR\s*\($args,\s*$args\)/$2 \*$1/gos;
1259 my $declaration = $members;
1260
1261 # Split nested struct/union elements as newer ones
1262 while ($members =~ m/$struct_members/) {
1263 my $newmember;
1264 my $maintype = $1;
1265 my $ids = $4;
1266 my $content = $3;
1267 foreach my $id(split /,/, $ids) {
1268 $newmember .= "$maintype $id; ";
1269
1270 $id =~ s/[:\[].*//;
1271 $id =~ s/^\s*\**(\S+)\s*/$1/;
1272 foreach my $arg (split /;/, $content) {
1273 next if ($arg =~ m/^\s*$/);
1274 if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
1275 # pointer-to-function
1276 my $type = $1;
1277 my $name = $2;
1278 my $extra = $3;
1279 next if (!$name);
1280 if ($id =~ m/^\s*$/) {
1281 # anonymous struct/union
1282 $newmember .= "$type$name$extra; ";
1283 } else {
1284 $newmember .= "$type$id.$name$extra; ";
1285 }
1286 } else {
1287 my $type;
1288 my $names;
1289 $arg =~ s/^\s+//;
1290 $arg =~ s/\s+$//;
1291 # Handle bitmaps
1292 $arg =~ s/:\s*\d+\s*//g;
1293 # Handle arrays
1294 $arg =~ s/\[.*\]//g;
1295 # The type may have multiple words,
1296 # and multiple IDs can be defined, like:
1297 # const struct foo, *bar, foobar
1298 # So, we remove spaces when parsing the
1299 # names, in order to match just names
1300 # and commas for the names
1301 $arg =~ s/\s*,\s*/,/g;
1302 if ($arg =~ m/(.*)\s+([\S+,]+)/) {
1303 $type = $1;
1304 $names = $2;
1305 } else {
1306 $newmember .= "$arg; ";
1307 next;
1308 }
1309 foreach my $name (split /,/, $names) {
1310 $name =~ s/^\s*\**(\S+)\s*/$1/;
1311 next if (($name =~ m/^\s*$/));
1312 if ($id =~ m/^\s*$/) {
1313 # anonymous struct/union
1314 $newmember .= "$type $name; ";
1315 } else {
1316 $newmember .= "$type $id.$name; ";
1317 }
1318 }
1319 }
1320 }
1321 }
1322 $members =~ s/$struct_members/$newmember/;
1323 }
1324
1325 # Ignore other nested elements, like enums
1326 $members =~ s/(\{[^\{\}]*\})//g;
1327
1328 create_parameterlist($members, ';', $file, $declaration_name);
1329 check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
1330
1331 # Adjust declaration for better display
1332 $declaration =~ s/([\{;])/$1\n/g;
1333 $declaration =~ s/\}\s+;/};/g;
1334 # Better handle inlined enums
1335 do {} while ($declaration =~ s/(enum\s+\{[^\}]+),([^\n])/$1,\n$2/);
1336
1337 my @def_args = split /\n/, $declaration;
1338 my $level = 1;
1339 $declaration = "";
1340 foreach my $clause (@def_args) {
1341 $clause =~ s/^\s+//;
1342 $clause =~ s/\s+$//;
1343 $clause =~ s/\s+/ /;
1344 next if (!$clause);
1345 $level-- if ($clause =~ m/(\})/ && $level > 1);
1346 if (!($clause =~ m/^\s*#/)) {
1347 $declaration .= "\t" x $level;
1348 }
1349 $declaration .= "\t" . $clause . "\n";
1350 $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
1351 }
1352 output_declaration($declaration_name,
1353 'struct',
1354 {'struct' => $declaration_name,
1355 'module' => $modulename,
1356 'definition' => $declaration,
1357 'parameterlist' => \@parameterlist,
1358 'parameterdescs' => \%parameterdescs,
1359 'parametertypes' => \%parametertypes,
1360 'sectionlist' => \@sectionlist,
1361 'sections' => \%sections,
1362 'purpose' => $declaration_purpose,
1363 'type' => $decl_type
1364 });
1365 }
1366 else {
1367 print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
1368 ++$errors;
1369 }
1370}
1371
1372
1373sub show_warnings($$) {
1374 my $functype = shift;
1375 my $name = shift;
1376
1377 return 0 if (defined($nosymbol_table{$name}));
1378
1379 return 1 if ($output_selection == OUTPUT_ALL);
1380
1381 if ($output_selection == OUTPUT_EXPORTED) {
1382 if (defined($function_table{$name})) {
1383 return 1;
1384 } else {
1385 return 0;
1386 }
1387 }
1388 if ($output_selection == OUTPUT_INTERNAL) {
1389 if (!($functype eq "function" && defined($function_table{$name}))) {
1390 return 1;
1391 } else {
1392 return 0;
1393 }
1394 }
1395 if ($output_selection == OUTPUT_INCLUDE) {
1396 if (defined($function_table{$name})) {
1397 return 1;
1398 } else {
1399 return 0;
1400 }
1401 }
1402 die("Please add the new output type at show_warnings()");
1403}
1404
1405sub dump_enum($$) {
1406 my $x = shift;
1407 my $file = shift;
1408 my $members;
1409
1410
1411 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1412 # strip #define macros inside enums
1413 $x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
1414
1415 if ($x =~ /typedef\s+enum\s*\{(.*)\}\s*(\w*)\s*;/) {
1416 $declaration_name = $2;
1417 $members = $1;
1418 } elsif ($x =~ /enum\s+(\w*)\s*\{(.*)\}/) {
1419 $declaration_name = $1;
1420 $members = $2;
1421 }
1422
1423 if ($members) {
1424 if ($identifier ne $declaration_name) {
1425 if ($identifier eq "") {
1426 print STDERR "${file}:$.: warning: wrong kernel-doc identifier on line:\n";
1427 } else {
1428 print STDERR "${file}:$.: warning: expecting prototype for enum $identifier. Prototype was for enum $declaration_name instead\n";
1429 }
1430 return;
1431 }
1432 $declaration_name = "(anonymous)" if ($declaration_name eq "");
1433
1434 my %_members;
1435
1436 $members =~ s/\s+$//;
1437
1438 foreach my $arg (split ',', $members) {
1439 $arg =~ s/^\s*(\w+).*/$1/;
1440 push @parameterlist, $arg;
1441 if (!$parameterdescs{$arg}) {
1442 $parameterdescs{$arg} = $undescribed;
1443 if (show_warnings("enum", $declaration_name)) {
1444 print STDERR "${file}:$.: warning: Enum value '$arg' not described in enum '$declaration_name'\n";
1445 }
1446 }
1447 $_members{$arg} = 1;
1448 }
1449
1450 while (my ($k, $v) = each %parameterdescs) {
1451 if (!exists($_members{$k})) {
1452 if (show_warnings("enum", $declaration_name)) {
1453 print STDERR "${file}:$.: warning: Excess enum value '$k' description in '$declaration_name'\n";
1454 }
1455 }
1456 }
1457
1458 output_declaration($declaration_name,
1459 'enum',
1460 {'enum' => $declaration_name,
1461 'module' => $modulename,
1462 'parameterlist' => \@parameterlist,
1463 'parameterdescs' => \%parameterdescs,
1464 'sectionlist' => \@sectionlist,
1465 'sections' => \%sections,
1466 'purpose' => $declaration_purpose
1467 });
1468 } else {
1469 print STDERR "${file}:$.: error: Cannot parse enum!\n";
1470 ++$errors;
1471 }
1472}
1473
1474my $typedef_type = qr { ((?:\s+[\w\*]+\b){1,8})\s* }x;
1475my $typedef_ident = qr { \*?\s*(\w\S+)\s* }x;
1476my $typedef_args = qr { \s*\((.*)\); }x;
1477
1478my $typedef1 = qr { typedef$typedef_type\($typedef_ident\)$typedef_args }x;
1479my $typedef2 = qr { typedef$typedef_type$typedef_ident$typedef_args }x;
1480
1481sub dump_typedef($$) {
1482 my $x = shift;
1483 my $file = shift;
1484
1485 $x =~ s@/\*.*?\*/@@gos; # strip comments.
1486
1487 # Parse function typedef prototypes
1488 if ($x =~ $typedef1 || $x =~ $typedef2) {
1489 $return_type = $1;
1490 $declaration_name = $2;
1491 my $args = $3;
1492 $return_type =~ s/^\s+//;
1493
1494 if ($identifier ne $declaration_name) {
1495 print STDERR "${file}:$.: warning: expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n";
1496 return;
1497 }
1498
1499 create_parameterlist($args, ',', $file, $declaration_name);
1500
1501 output_declaration($declaration_name,
1502 'function',
1503 {'function' => $declaration_name,
1504 'typedef' => 1,
1505 'module' => $modulename,
1506 'functiontype' => $return_type,
1507 'parameterlist' => \@parameterlist,
1508 'parameterdescs' => \%parameterdescs,
1509 'parametertypes' => \%parametertypes,
1510 'sectionlist' => \@sectionlist,
1511 'sections' => \%sections,
1512 'purpose' => $declaration_purpose
1513 });
1514 return;
1515 }
1516
1517 while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
1518 $x =~ s/\(*.\)\s*;$/;/;
1519 $x =~ s/\[*.\]\s*;$/;/;
1520 }
1521
1522 if ($x =~ /typedef.*\s+(\w+)\s*;/) {
1523 $declaration_name = $1;
1524
1525 if ($identifier ne $declaration_name) {
1526 print STDERR "${file}:$.: warning: expecting prototype for typedef $identifier. Prototype was for typedef $declaration_name instead\n";
1527 return;
1528 }
1529
1530 output_declaration($declaration_name,
1531 'typedef',
1532 {'typedef' => $declaration_name,
1533 'module' => $modulename,
1534 'sectionlist' => \@sectionlist,
1535 'sections' => \%sections,
1536 'purpose' => $declaration_purpose
1537 });
1538 }
1539 else {
1540 print STDERR "${file}:$.: error: Cannot parse typedef!\n";
1541 ++$errors;
1542 }
1543}
1544
1545sub save_struct_actual($) {
1546 my $actual = shift;
1547
1548 # strip all spaces from the actual param so that it looks like one string item
1549 $actual =~ s/\s*//g;
1550 $struct_actual = $struct_actual . $actual . " ";
1551}
1552
1553sub create_parameterlist($$$$) {
1554 my $args = shift;
1555 my $splitter = shift;
1556 my $file = shift;
1557 my $declaration_name = shift;
1558 my $type;
1559 my $param;
1560
1561 # temporarily replace commas inside function pointer definition
1562 my $arg_expr = qr{\([^\),]+};
1563 while ($args =~ /$arg_expr,/) {
1564 $args =~ s/($arg_expr),/$1#/g;
1565 }
1566
1567 foreach my $arg (split($splitter, $args)) {
1568 # strip comments
1569 $arg =~ s/\/\*.*\*\///;
1570 # strip leading/trailing spaces
1571 $arg =~ s/^\s*//;
1572 $arg =~ s/\s*$//;
1573 $arg =~ s/\s+/ /;
1574
1575 if ($arg =~ /^#/) {
1576 # Treat preprocessor directive as a typeless variable just to fill
1577 # corresponding data structures "correctly". Catch it later in
1578 # output_* subs.
1579 push_parameter($arg, "", "", $file);
1580 } elsif ($arg =~ m/\(.+\)\s*\(/) {
1581 # pointer-to-function
1582 $arg =~ tr/#/,/;
1583 $arg =~ m/[^\(]+\(\*?\s*([\w\[\]\.]*)\s*\)/;
1584 $param = $1;
1585 $type = $arg;
1586 $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1587 save_struct_actual($param);
1588 push_parameter($param, $type, $arg, $file, $declaration_name);
1589 } elsif ($arg) {
1590 $arg =~ s/\s*:\s*/:/g;
1591 $arg =~ s/\s*\[/\[/g;
1592
1593 my @args = split('\s*,\s*', $arg);
1594 if ($args[0] =~ m/\*/) {
1595 $args[0] =~ s/(\*+)\s*/ $1/;
1596 }
1597
1598 my @first_arg;
1599 if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
1600 shift @args;
1601 push(@first_arg, split('\s+', $1));
1602 push(@first_arg, $2);
1603 } else {
1604 @first_arg = split('\s+', shift @args);
1605 }
1606
1607 unshift(@args, pop @first_arg);
1608 $type = join " ", @first_arg;
1609
1610 foreach $param (@args) {
1611 if ($param =~ m/^(\*+)\s*(.*)/) {
1612 save_struct_actual($2);
1613
1614 push_parameter($2, "$type $1", $arg, $file, $declaration_name);
1615 }
1616 elsif ($param =~ m/(.*?):(\d+)/) {
1617 if ($type ne "") { # skip unnamed bit-fields
1618 save_struct_actual($1);
1619 push_parameter($1, "$type:$2", $arg, $file, $declaration_name)
1620 }
1621 }
1622 else {
1623 save_struct_actual($param);
1624 push_parameter($param, $type, $arg, $file, $declaration_name);
1625 }
1626 }
1627 }
1628 }
1629}
1630
1631sub push_parameter($$$$$) {
1632 my $param = shift;
1633 my $type = shift;
1634 my $org_arg = shift;
1635 my $file = shift;
1636 my $declaration_name = shift;
1637
1638 if (($anon_struct_union == 1) && ($type eq "") &&
1639 ($param eq "}")) {
1640 return; # ignore the ending }; from anon. struct/union
1641 }
1642
1643 $anon_struct_union = 0;
1644 $param =~ s/[\[\)].*//;
1645
1646 if ($type eq "" && $param =~ /\.\.\.$/)
1647 {
1648 if (!$param =~ /\w\.\.\.$/) {
1649 # handles unnamed variable parameters
1650 $param = "...";
1651 }
1652 elsif ($param =~ /\w\.\.\.$/) {
1653 # for named variable parameters of the form `x...`, remove the dots
1654 $param =~ s/\.\.\.$//;
1655 }
1656 if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
1657 $parameterdescs{$param} = "variable arguments";
1658 }
1659 }
1660 elsif ($type eq "" && ($param eq "" or $param eq "void"))
1661 {
1662 $param="void";
1663 $parameterdescs{void} = "no arguments";
1664 }
1665 elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
1666 # handle unnamed (anonymous) union or struct:
1667 {
1668 $type = $param;
1669 $param = "{unnamed_" . $param . "}";
1670 $parameterdescs{$param} = "anonymous\n";
1671 $anon_struct_union = 1;
1672 }
1673
1674 # warn if parameter has no description
1675 # (but ignore ones starting with # as these are not parameters
1676 # but inline preprocessor statements);
1677 # Note: It will also ignore void params and unnamed structs/unions
1678 if (!defined $parameterdescs{$param} && $param !~ /^#/) {
1679 $parameterdescs{$param} = $undescribed;
1680
1681 if (show_warnings($type, $declaration_name) && $param !~ /\./) {
1682 print STDERR
1683 "${file}:$.: warning: Function parameter or member '$param' not described in '$declaration_name'\n";
1684 ++$warnings;
1685 }
1686 }
1687
1688 # strip spaces from $param so that it is one continuous string
1689 # on @parameterlist;
1690 # this fixes a problem where check_sections() cannot find
1691 # a parameter like "addr[6 + 2]" because it actually appears
1692 # as "addr[6", "+", "2]" on the parameter list;
1693 # but it's better to maintain the param string unchanged for output,
1694 # so just weaken the string compare in check_sections() to ignore
1695 # "[blah" in a parameter string;
1696 ###$param =~ s/\s*//g;
1697 push @parameterlist, $param;
1698 $org_arg =~ s/\s\s+/ /g;
1699 $parametertypes{$param} = $org_arg;
1700}
1701
1702sub check_sections($$$$$) {
1703 my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck) = @_;
1704 my @sects = split ' ', $sectcheck;
1705 my @prms = split ' ', $prmscheck;
1706 my $err;
1707 my ($px, $sx);
1708 my $prm_clean; # strip trailing "[array size]" and/or beginning "*"
1709
1710 foreach $sx (0 .. $#sects) {
1711 $err = 1;
1712 foreach $px (0 .. $#prms) {
1713 $prm_clean = $prms[$px];
1714 $prm_clean =~ s/\[.*\]//;
1715 $prm_clean =~ s/$attribute//i;
1716 # ignore array size in a parameter string;
1717 # however, the original param string may contain
1718 # spaces, e.g.: addr[6 + 2]
1719 # and this appears in @prms as "addr[6" since the
1720 # parameter list is split at spaces;
1721 # hence just ignore "[..." for the sections check;
1722 $prm_clean =~ s/\[.*//;
1723
1724 ##$prm_clean =~ s/^\**//;
1725 if ($prm_clean eq $sects[$sx]) {
1726 $err = 0;
1727 last;
1728 }
1729 }
1730 if ($err) {
1731 if ($decl_type eq "function") {
1732 print STDERR "${file}:$.: warning: " .
1733 "Excess function parameter " .
1734 "'$sects[$sx]' " .
1735 "description in '$decl_name'\n";
1736 ++$warnings;
1737 }
1738 }
1739 }
1740}
1741
1742##
1743# Checks the section describing the return value of a function.
1744sub check_return_section {
1745 my $file = shift;
1746 my $declaration_name = shift;
1747 my $return_type = shift;
1748
1749 # Ignore an empty return type (It's a macro)
1750 # Ignore functions with a "void" return type. (But don't ignore "void *")
1751 if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
1752 return;
1753 }
1754
1755 if (!defined($sections{$section_return}) ||
1756 $sections{$section_return} eq "") {
1757 print STDERR "${file}:$.: warning: " .
1758 "No description found for return value of " .
1759 "'$declaration_name'\n";
1760 ++$warnings;
1761 }
1762}
1763
1764##
1765# takes a function prototype and the name of the current file being
1766# processed and spits out all the details stored in the global
1767# arrays/hashes.
1768sub dump_function($$) {
1769 my $prototype = shift;
1770 my $file = shift;
1771 my $noret = 0;
1772
1773 print_lineno($new_start_line);
1774
1775 $prototype =~ s/^static +//;
1776 $prototype =~ s/^extern +//;
1777 $prototype =~ s/^asmlinkage +//;
1778 $prototype =~ s/^inline +//;
1779 $prototype =~ s/^__inline__ +//;
1780 $prototype =~ s/^__inline +//;
1781 $prototype =~ s/^__always_inline +//;
1782 $prototype =~ s/^noinline +//;
1783 $prototype =~ s/__init +//;
1784 $prototype =~ s/__init_or_module +//;
1785 $prototype =~ s/__deprecated +//;
1786 $prototype =~ s/__flatten +//;
1787 $prototype =~ s/__meminit +//;
1788 $prototype =~ s/__must_check +//;
1789 $prototype =~ s/__weak +//;
1790 $prototype =~ s/__sched +//;
1791 $prototype =~ s/__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +//;
1792 my $define = $prototype =~ s/^#\s*define\s+//; #ak added
1793 $prototype =~ s/__attribute_const__ +//;
1794 $prototype =~ s/__attribute__\s*\(\(
1795 (?:
1796 [\w\s]++ # attribute name
1797 (?:\([^)]*+\))? # attribute arguments
1798 \s*+,? # optional comma at the end
1799 )+
1800 \)\)\s+//x;
1801
1802 # Yes, this truly is vile. We are looking for:
1803 # 1. Return type (may be nothing if we're looking at a macro)
1804 # 2. Function name
1805 # 3. Function parameters.
1806 #
1807 # All the while we have to watch out for function pointer parameters
1808 # (which IIRC is what the two sections are for), C types (these
1809 # regexps don't even start to express all the possibilities), and
1810 # so on.
1811 #
1812 # If you mess with these regexps, it's a good idea to check that
1813 # the following functions' documentation still comes out right:
1814 # - parport_register_device (function pointer parameters)
1815 # - atomic_set (macro)
1816 # - pci_match_device, __copy_to_user (long return type)
1817 my $name = qr{[a-zA-Z0-9_~:]+};
1818 my $prototype_end1 = qr{[^\(]*};
1819 my $prototype_end2 = qr{[^\{]*};
1820 my $prototype_end = qr{\(($prototype_end1|$prototype_end2)\)};
1821 my $type1 = qr{[\w\s]+};
1822 my $type2 = qr{$type1\*+};
1823
1824 if ($define && $prototype =~ m/^()($name)\s+/) {
1825 # This is an object-like macro, it has no return type and no parameter
1826 # list.
1827 # Function-like macros are not allowed to have spaces between
1828 # declaration_name and opening parenthesis (notice the \s+).
1829 $return_type = $1;
1830 $declaration_name = $2;
1831 $noret = 1;
1832 } elsif ($prototype =~ m/^()($name)\s*$prototype_end/ ||
1833 $prototype =~ m/^($type1)\s+($name)\s*$prototype_end/ ||
1834 $prototype =~ m/^($type2+)\s*($name)\s*$prototype_end/) {
1835 $return_type = $1;
1836 $declaration_name = $2;
1837 my $args = $3;
1838
1839 create_parameterlist($args, ',', $file, $declaration_name);
1840 } else {
1841 print STDERR "${file}:$.: warning: cannot understand function prototype: '$prototype'\n";
1842 return;
1843 }
1844
1845 if ($identifier ne $declaration_name) {
1846 print STDERR "${file}:$.: warning: expecting prototype for $identifier(). Prototype was for $declaration_name() instead\n";
1847 return;
1848 }
1849
1850 my $prms = join " ", @parameterlist;
1851 check_sections($file, $declaration_name, "function", $sectcheck, $prms);
1852
1853 # This check emits a lot of warnings at the moment, because many
1854 # functions don't have a 'Return' doc section. So until the number
1855 # of warnings goes sufficiently down, the check is only performed in
1856 # verbose mode.
1857 # TODO: always perform the check.
1858 if ($verbose && !$noret) {
1859 check_return_section($file, $declaration_name, $return_type);
1860 }
1861
1862 # The function parser can be called with a typedef parameter.
1863 # Handle it.
1864 if ($return_type =~ /typedef/) {
1865 output_declaration($declaration_name,
1866 'function',
1867 {'function' => $declaration_name,
1868 'typedef' => 1,
1869 'module' => $modulename,
1870 'functiontype' => $return_type,
1871 'parameterlist' => \@parameterlist,
1872 'parameterdescs' => \%parameterdescs,
1873 'parametertypes' => \%parametertypes,
1874 'sectionlist' => \@sectionlist,
1875 'sections' => \%sections,
1876 'purpose' => $declaration_purpose
1877 });
1878 } else {
1879 output_declaration($declaration_name,
1880 'function',
1881 {'function' => $declaration_name,
1882 'module' => $modulename,
1883 'functiontype' => $return_type,
1884 'parameterlist' => \@parameterlist,
1885 'parameterdescs' => \%parameterdescs,
1886 'parametertypes' => \%parametertypes,
1887 'sectionlist' => \@sectionlist,
1888 'sections' => \%sections,
1889 'purpose' => $declaration_purpose
1890 });
1891 }
1892}
1893
1894sub reset_state {
1895 $function = "";
1896 %parameterdescs = ();
1897 %parametertypes = ();
1898 @parameterlist = ();
1899 %sections = ();
1900 @sectionlist = ();
1901 $sectcheck = "";
1902 $struct_actual = "";
1903 $prototype = "";
1904
1905 $state = STATE_NORMAL;
1906 $inline_doc_state = STATE_INLINE_NA;
1907}
1908
1909sub tracepoint_munge($) {
1910 my $file = shift;
1911 my $tracepointname = 0;
1912 my $tracepointargs = 0;
1913
1914 if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
1915 $tracepointname = $1;
1916 }
1917 if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
1918 $tracepointname = $1;
1919 }
1920 if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
1921 $tracepointname = $2;
1922 }
1923 $tracepointname =~ s/^\s+//; #strip leading whitespace
1924 if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
1925 $tracepointargs = $1;
1926 }
1927 if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
1928 print STDERR "${file}:$.: warning: Unrecognized tracepoint format: \n".
1929 "$prototype\n";
1930 } else {
1931 $prototype = "static inline void trace_$tracepointname($tracepointargs)";
1932 $identifier = "trace_$identifier";
1933 }
1934}
1935
1936sub syscall_munge() {
1937 my $void = 0;
1938
1939 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
1940## if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
1941 if ($prototype =~ m/SYSCALL_DEFINE0/) {
1942 $void = 1;
1943## $prototype = "long sys_$1(void)";
1944 }
1945
1946 $prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
1947 if ($prototype =~ m/long (sys_.*?),/) {
1948 $prototype =~ s/,/\(/;
1949 } elsif ($void) {
1950 $prototype =~ s/\)/\(void\)/;
1951 }
1952
1953 # now delete all of the odd-number commas in $prototype
1954 # so that arg types & arg names don't have a comma between them
1955 my $count = 0;
1956 my $len = length($prototype);
1957 if ($void) {
1958 $len = 0; # skip the for-loop
1959 }
1960 for (my $ix = 0; $ix < $len; $ix++) {
1961 if (substr($prototype, $ix, 1) eq ',') {
1962 $count++;
1963 if ($count % 2 == 1) {
1964 substr($prototype, $ix, 1) = ' ';
1965 }
1966 }
1967 }
1968}
1969
1970sub process_proto_function($$) {
1971 my $x = shift;
1972 my $file = shift;
1973
1974 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1975
1976 if ($x =~ m#\s*/\*\s+MACDOC\s*#io || ($x =~ /^#/ && $x !~ /^#\s*define/)) {
1977 # do nothing
1978 }
1979 elsif ($x =~ /([^\{]*)/) {
1980 $prototype .= $1;
1981 }
1982
1983 if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
1984 $prototype =~ s@/\*.*?\*/@@gos; # strip comments.
1985 $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1986 $prototype =~ s@^\s+@@gos; # strip leading spaces
1987
1988 # Handle prototypes for function pointers like:
1989 # int (*pcs_config)(struct foo)
1990 $prototype =~ s@^(\S+\s+)\(\s*\*(\S+)\)@$1$2@gos;
1991
1992 if ($prototype =~ /SYSCALL_DEFINE/) {
1993 syscall_munge();
1994 }
1995 if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
1996 $prototype =~ /DEFINE_SINGLE_EVENT/)
1997 {
1998 tracepoint_munge($file);
1999 }
2000 dump_function($prototype, $file);
2001 reset_state();
2002 }
2003}
2004
2005sub process_proto_type($$) {
2006 my $x = shift;
2007 my $file = shift;
2008
2009 $x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
2010 $x =~ s@^\s+@@gos; # strip leading spaces
2011 $x =~ s@\s+$@@gos; # strip trailing spaces
2012 $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
2013
2014 if ($x =~ /^#/) {
2015 # To distinguish preprocessor directive from regular declaration later.
2016 $x .= ";";
2017 }
2018
2019 while (1) {
2020 if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
2021 if( length $prototype ) {
2022 $prototype .= " "
2023 }
2024 $prototype .= $1 . $2;
2025 ($2 eq '{') && $brcount++;
2026 ($2 eq '}') && $brcount--;
2027 if (($2 eq ';') && ($brcount == 0)) {
2028 dump_declaration($prototype, $file);
2029 reset_state();
2030 last;
2031 }
2032 $x = $3;
2033 } else {
2034 $prototype .= $x;
2035 last;
2036 }
2037 }
2038}
2039
2040
2041sub map_filename($) {
2042 my $file;
2043 my ($orig_file) = @_;
2044
2045 if (defined($ENV{'SRCTREE'})) {
2046 $file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
2047 } else {
2048 $file = $orig_file;
2049 }
2050
2051 if (defined($source_map{$file})) {
2052 $file = $source_map{$file};
2053 }
2054
2055 return $file;
2056}
2057
2058sub process_export_file($) {
2059 my ($orig_file) = @_;
2060 my $file = map_filename($orig_file);
2061
2062 if (!open(IN,"<$file")) {
2063 print STDERR "Error: Cannot open file $file\n";
2064 ++$errors;
2065 return;
2066 }
2067
2068 while (<IN>) {
2069 if (/$export_symbol/) {
2070 next if (defined($nosymbol_table{$2}));
2071 $function_table{$2} = 1;
2072 }
2073 }
2074
2075 close(IN);
2076}
2077
2078#
2079# Parsers for the various processing states.
2080#
2081# STATE_NORMAL: looking for the /** to begin everything.
2082#
2083sub process_normal() {
2084 if (/$doc_start/o) {
2085 $state = STATE_NAME; # next line is always the function name
2086 $in_doc_sect = 0;
2087 $declaration_start_line = $. + 1;
2088 }
2089}
2090
2091#
2092# STATE_NAME: Looking for the "name - description" line
2093#
2094sub process_name($$) {
2095 my $file = shift;
2096 my $descr;
2097
2098 if (/$doc_block/o) {
2099 $state = STATE_DOCBLOCK;
2100 $contents = "";
2101 $new_start_line = $.;
2102
2103 if ( $1 eq "" ) {
2104 $section = $section_intro;
2105 } else {
2106 $section = $1;
2107 }
2108 } elsif (/$doc_decl/o) {
2109 $identifier = $1;
2110 my $is_kernel_comment = 0;
2111 my $decl_start = qr{$doc_com};
2112 # test for pointer declaration type, foo * bar() - desc
2113 my $fn_type = qr{\w+\s*\*\s*};
2114 my $parenthesis = qr{\(\w*\)};
2115 my $decl_end = qr{[-:].*};
2116 if (/^$decl_start([\w\s]+?)$parenthesis?\s*$decl_end?$/) {
2117 $identifier = $1;
2118 }
2119 if ($identifier =~ m/^(struct|union|enum|typedef)\b\s*(\S*)/) {
2120 $decl_type = $1;
2121 $identifier = $2;
2122 $is_kernel_comment = 1;
2123 }
2124 # Look for foo() or static void foo() - description; or misspelt
2125 # identifier
2126 elsif (/^$decl_start$fn_type?(\w+)\s*$parenthesis?\s*$decl_end?$/ ||
2127 /^$decl_start$fn_type?(\w+.*)$parenthesis?\s*$decl_end$/) {
2128 $identifier = $1;
2129 $decl_type = 'function';
2130 $identifier =~ s/^define\s+//;
2131 $is_kernel_comment = 1;
2132 }
2133 $identifier =~ s/\s+$//;
2134
2135 $state = STATE_BODY;
2136 # if there's no @param blocks need to set up default section
2137 # here
2138 $contents = "";
2139 $section = $section_default;
2140 $new_start_line = $. + 1;
2141 if (/[-:](.*)/) {
2142 # strip leading/trailing/multiple spaces
2143 $descr= $1;
2144 $descr =~ s/^\s*//;
2145 $descr =~ s/\s*$//;
2146 $descr =~ s/\s+/ /g;
2147 $declaration_purpose = $descr;
2148 $state = STATE_BODY_MAYBE;
2149 } else {
2150 $declaration_purpose = "";
2151 }
2152
2153 if (!$is_kernel_comment) {
2154 print STDERR "${file}:$.: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst\n";
2155 print STDERR $_;
2156 ++$warnings;
2157 $state = STATE_NORMAL;
2158 }
2159
2160 if (($declaration_purpose eq "") && $verbose) {
2161 print STDERR "${file}:$.: warning: missing initial short description on line:\n";
2162 print STDERR $_;
2163 ++$warnings;
2164 }
2165
2166 if ($identifier eq "" && $decl_type ne "enum") {
2167 print STDERR "${file}:$.: warning: wrong kernel-doc identifier on line:\n";
2168 print STDERR $_;
2169 ++$warnings;
2170 $state = STATE_NORMAL;
2171 }
2172
2173 if ($verbose) {
2174 print STDERR "${file}:$.: info: Scanning doc for $decl_type $identifier\n";
2175 }
2176 } else {
2177 print STDERR "${file}:$.: warning: Cannot understand $_ on line $.",
2178 " - I thought it was a doc line\n";
2179 ++$warnings;
2180 $state = STATE_NORMAL;
2181 }
2182}
2183
2184
2185#
2186# STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
2187#
2188sub process_body($$) {
2189 my $file = shift;
2190
2191 # Until all named variable macro parameters are
2192 # documented using the bare name (`x`) rather than with
2193 # dots (`x...`), strip the dots:
2194 if ($section =~ /\w\.\.\.$/) {
2195 $section =~ s/\.\.\.$//;
2196
2197 if ($verbose) {
2198 print STDERR "${file}:$.: warning: Variable macro arguments should be documented without dots\n";
2199 ++$warnings;
2200 }
2201 }
2202
2203 if ($state == STATE_BODY_WITH_BLANK_LINE && /^\s*\*\s?\S/) {
2204 dump_section($file, $section, $contents);
2205 $section = $section_default;
2206 $new_start_line = $.;
2207 $contents = "";
2208 }
2209
2210 if (/$doc_sect/i) { # case insensitive for supported section names
2211 $newsection = $1;
2212 $newcontents = $2;
2213
2214 # map the supported section names to the canonical names
2215 if ($newsection =~ m/^description$/i) {
2216 $newsection = $section_default;
2217 } elsif ($newsection =~ m/^context$/i) {
2218 $newsection = $section_context;
2219 } elsif ($newsection =~ m/^returns?$/i) {
2220 $newsection = $section_return;
2221 } elsif ($newsection =~ m/^\@return$/) {
2222 # special: @return is a section, not a param description
2223 $newsection = $section_return;
2224 }
2225
2226 if (($contents ne "") && ($contents ne "\n")) {
2227 if (!$in_doc_sect && $verbose) {
2228 print STDERR "${file}:$.: warning: contents before sections\n";
2229 ++$warnings;
2230 }
2231 dump_section($file, $section, $contents);
2232 $section = $section_default;
2233 }
2234
2235 $in_doc_sect = 1;
2236 $state = STATE_BODY;
2237 $contents = $newcontents;
2238 $new_start_line = $.;
2239 while (substr($contents, 0, 1) eq " ") {
2240 $contents = substr($contents, 1);
2241 }
2242 if ($contents ne "") {
2243 $contents .= "\n";
2244 }
2245 $section = $newsection;
2246 $leading_space = undef;
2247 } elsif (/$doc_end/) {
2248 if (($contents ne "") && ($contents ne "\n")) {
2249 dump_section($file, $section, $contents);
2250 $section = $section_default;
2251 $contents = "";
2252 }
2253 # look for doc_com + <text> + doc_end:
2254 if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
2255 print STDERR "${file}:$.: warning: suspicious ending line: $_";
2256 ++$warnings;
2257 }
2258
2259 $prototype = "";
2260 $state = STATE_PROTO;
2261 $brcount = 0;
2262 $new_start_line = $. + 1;
2263 } elsif (/$doc_content/) {
2264 if ($1 eq "") {
2265 if ($section eq $section_context) {
2266 dump_section($file, $section, $contents);
2267 $section = $section_default;
2268 $contents = "";
2269 $new_start_line = $.;
2270 $state = STATE_BODY;
2271 } else {
2272 if ($section ne $section_default) {
2273 $state = STATE_BODY_WITH_BLANK_LINE;
2274 } else {
2275 $state = STATE_BODY;
2276 }
2277 $contents .= "\n";
2278 }
2279 } elsif ($state == STATE_BODY_MAYBE) {
2280 # Continued declaration purpose
2281 chomp($declaration_purpose);
2282 $declaration_purpose .= " " . $1;
2283 $declaration_purpose =~ s/\s+/ /g;
2284 } else {
2285 my $cont = $1;
2286 if ($section =~ m/^@/ || $section eq $section_context) {
2287 if (!defined $leading_space) {
2288 if ($cont =~ m/^(\s+)/) {
2289 $leading_space = $1;
2290 } else {
2291 $leading_space = "";
2292 }
2293 }
2294 $cont =~ s/^$leading_space//;
2295 }
2296 $contents .= $cont . "\n";
2297 }
2298 } else {
2299 # i dont know - bad line? ignore.
2300 print STDERR "${file}:$.: warning: bad line: $_";
2301 ++$warnings;
2302 }
2303}
2304
2305
2306#
2307# STATE_PROTO: reading a function/whatever prototype.
2308#
2309sub process_proto($$) {
2310 my $file = shift;
2311
2312 if (/$doc_inline_oneline/) {
2313 $section = $1;
2314 $contents = $2;
2315 if ($contents ne "") {
2316 $contents .= "\n";
2317 dump_section($file, $section, $contents);
2318 $section = $section_default;
2319 $contents = "";
2320 }
2321 } elsif (/$doc_inline_start/) {
2322 $state = STATE_INLINE;
2323 $inline_doc_state = STATE_INLINE_NAME;
2324 } elsif ($decl_type eq 'function') {
2325 process_proto_function($_, $file);
2326 } else {
2327 process_proto_type($_, $file);
2328 }
2329}
2330
2331#
2332# STATE_DOCBLOCK: within a DOC: block.
2333#
2334sub process_docblock($$) {
2335 my $file = shift;
2336
2337 if (/$doc_end/) {
2338 dump_doc_section($file, $section, $contents);
2339 $section = $section_default;
2340 $contents = "";
2341 $function = "";
2342 %parameterdescs = ();
2343 %parametertypes = ();
2344 @parameterlist = ();
2345 %sections = ();
2346 @sectionlist = ();
2347 $prototype = "";
2348 $state = STATE_NORMAL;
2349 } elsif (/$doc_content/) {
2350 if ( $1 eq "" ) {
2351 $contents .= $blankline;
2352 } else {
2353 $contents .= $1 . "\n";
2354 }
2355 }
2356}
2357
2358#
2359# STATE_INLINE: docbook comments within a prototype.
2360#
2361sub process_inline($$) {
2362 my $file = shift;
2363
2364 # First line (state 1) needs to be a @parameter
2365 if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
2366 $section = $1;
2367 $contents = $2;
2368 $new_start_line = $.;
2369 if ($contents ne "") {
2370 while (substr($contents, 0, 1) eq " ") {
2371 $contents = substr($contents, 1);
2372 }
2373 $contents .= "\n";
2374 }
2375 $inline_doc_state = STATE_INLINE_TEXT;
2376 # Documentation block end */
2377 } elsif (/$doc_inline_end/) {
2378 if (($contents ne "") && ($contents ne "\n")) {
2379 dump_section($file, $section, $contents);
2380 $section = $section_default;
2381 $contents = "";
2382 }
2383 $state = STATE_PROTO;
2384 $inline_doc_state = STATE_INLINE_NA;
2385 # Regular text
2386 } elsif (/$doc_content/) {
2387 if ($inline_doc_state == STATE_INLINE_TEXT) {
2388 $contents .= $1 . "\n";
2389 # nuke leading blank lines
2390 if ($contents =~ /^\s*$/) {
2391 $contents = "";
2392 }
2393 } elsif ($inline_doc_state == STATE_INLINE_NAME) {
2394 $inline_doc_state = STATE_INLINE_ERROR;
2395 print STDERR "${file}:$.: warning: ";
2396 print STDERR "Incorrect use of kernel-doc format: $_";
2397 ++$warnings;
2398 }
2399 }
2400}
2401
2402
2403sub process_file($) {
2404 my $file;
2405 my $initial_section_counter = $section_counter;
2406 my ($orig_file) = @_;
2407
2408 $file = map_filename($orig_file);
2409
2410 if (!open(IN_FILE,"<$file")) {
2411 print STDERR "Error: Cannot open file $file\n";
2412 ++$errors;
2413 return;
2414 }
2415
2416 $. = 1;
2417
2418 $section_counter = 0;
2419 while (<IN_FILE>) {
2420 while (s/\\\s*$//) {
2421 $_ .= <IN_FILE>;
2422 }
2423 # Replace tabs by spaces
2424 while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
2425 # Hand this line to the appropriate state handler
2426 if ($state == STATE_NORMAL) {
2427 process_normal();
2428 } elsif ($state == STATE_NAME) {
2429 process_name($file, $_);
2430 } elsif ($state == STATE_BODY || $state == STATE_BODY_MAYBE ||
2431 $state == STATE_BODY_WITH_BLANK_LINE) {
2432 process_body($file, $_);
2433 } elsif ($state == STATE_INLINE) { # scanning for inline parameters
2434 process_inline($file, $_);
2435 } elsif ($state == STATE_PROTO) {
2436 process_proto($file, $_);
2437 } elsif ($state == STATE_DOCBLOCK) {
2438 process_docblock($file, $_);
2439 }
2440 }
2441
2442 # Make sure we got something interesting.
2443 if ($initial_section_counter == $section_counter && $
2444 output_mode ne "none") {
2445 if ($output_selection == OUTPUT_INCLUDE) {
2446 print STDERR "${file}:1: warning: '$_' not found\n"
2447 for keys %function_table;
2448 }
2449 else {
2450 print STDERR "${file}:1: warning: no structured comments found\n";
2451 }
2452 }
2453 close IN_FILE;
2454}
2455
2456
2457if ($output_mode eq "rst") {
2458 get_sphinx_version() if (!$sphinx_major);
2459}
2460
2461$kernelversion = get_kernel_version();
2462
2463# generate a sequence of code that will splice in highlighting information
2464# using the s// operator.
2465for (my $k = 0; $k < @highlights; $k++) {
2466 my $pattern = $highlights[$k][0];
2467 my $result = $highlights[$k][1];
2468# print STDERR "scanning pattern:$pattern, highlight:($result)\n";
2469 $dohighlight .= "\$contents =~ s:$pattern:$result:gs;\n";
2470}
2471
2472# Read the file that maps relative names to absolute names for
2473# separate source and object directories and for shadow trees.
2474if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
2475 my ($relname, $absname);
2476 while(<SOURCE_MAP>) {
2477 chop();
2478 ($relname, $absname) = (split())[0..1];
2479 $relname =~ s:^/+::;
2480 $source_map{$relname} = $absname;
2481 }
2482 close(SOURCE_MAP);
2483}
2484
2485if ($output_selection == OUTPUT_EXPORTED ||
2486 $output_selection == OUTPUT_INTERNAL) {
2487
2488 push(@export_file_list, @ARGV);
2489
2490 foreach (@export_file_list) {
2491 chomp;
2492 process_export_file($_);
2493 }
2494}
2495
2496foreach (@ARGV) {
2497 chomp;
2498 process_file($_);
2499}
2500if ($verbose && $errors) {
2501 print STDERR "$errors errors\n";
2502}
2503if ($verbose && $warnings) {
2504 print STDERR "$warnings warnings\n";
2505}
2506
2507if ($Werror && $warnings) {
2508 print STDERR "$warnings warnings as Errors\n";
2509 exit($warnings);
2510} else {
2511 exit($output_mode eq "none" ? 0 : $errors)
2512}