scripts/kernel-doc

   1 #!/usr/bin/env perl
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 use warnings;
   5 use 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
  44 sub usage {
  45     my $message = <<"EOF";
  46 Usage: $0 [OPTION ...] FILE ...
  47
  48 Read C language source or header FILEs, extract embedded documentation comments,
  49 and print formatted documentation to standard output.
  50
  51 The documentation comments are identified by "/**" opening comment mark. See
  52 Documentation/doc-guide/kernel-doc.rst for the documentation comment syntax.
  53
  54 Output 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
  59 Output 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
  73 Output selection modifiers:
  74   -sphinx-version VER   Generate rST syntax for the specified Sphinx version.
  75                         Only works with reStructuredTextFormat.
  76   -no-doc-sections      Do not output DOC: sections.
  77   -enable-lineno        Enable output of #define LINENO lines. Only works with
  78                         reStructuredText format.
  79   -export-file FILE     Specify an additional FILE in which to look for
  80                         EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
  81                         -export or -internal. May be specified multiple times.
  82
  83 Other parameters:
  84   -v                    Verbose output, more warnings and other information.
  85   -h                    Print this help.
  86
  87 EOF
  88     print $message;
  89     exit 1;
  90 }
  91
  92 #
  93 # format of comments.
  94 # In the following table, (...)? signifies optional structure.
  95 #                         (...)* signifies 0 or more structure elements
  96 # /**
  97 #  * function_name(:)? (- short description)?
  98 # (* @parameterx: (description of parameter x)?)*
  99 # (* a blank line)?
 100 #  * (Description:)? (Description of function)?
 101 #  * (section header: (section description)? )*
 102 #  (*)?*/
 103 #
 104 # So .. the trivial example would be:
 105 #
 106 # /**
 107 #  * my_function
 108 #  */
 109 #
 110 # If the Description: header tag is omitted, then there must be a blank line
 111 # after the last parameter specification.
 112 # e.g.
 113 # /**
 114 #  * my_function - does my stuff
 115 #  * @my_arg: its mine damnit
 116 #  *
 117 #  * Does my stuff explained.
 118 #  */
 119 #
 120 #  or, could also use:
 121 # /**
 122 #  * my_function - does my stuff
 123 #  * @my_arg: its mine damnit
 124 #  * Description: Does my stuff explained.
 125 #  */
 126 # etc.
 127 #
 128 # Besides functions you can also write documentation for structs, unions,
 129 # enums and typedefs. Instead of the function name you must write the name
 130 # of the declaration;  the struct/union/enum/typedef must always precede
 131 # the name. Nesting of declarations is not supported.
 132 # Use the argument mechanism to document members or constants.
 133 # e.g.
 134 # /**
 135 #  * struct my_struct - short description
 136 #  * @a: first member
 137 #  * @b: second member
 138 #  *
 139 #  * Longer description
 140 #  */
 141 # struct my_struct {
 142 #     int a;
 143 #     int b;
 144 # /* private: */
 145 #     int c;
 146 # };
 147 #
 148 # All descriptions can be multiline, except the short function description.
 149 #
 150 # For really longs structs, you can also describe arguments inside the
 151 # body of the struct.
 152 # eg.
 153 # /**
 154 #  * struct my_struct - short description
 155 #  * @a: first member
 156 #  * @b: second member
 157 #  *
 158 #  * Longer description
 159 #  */
 160 # struct my_struct {
 161 #     int a;
 162 #     int b;
 163 #     /**
 164 #      * @c: This is longer description of C
 165 #      *
 166 #      * You can use paragraphs to describe arguments
 167 #      * using this method.
 168 #      */
 169 #     int c;
 170 # };
 171 #
 172 # This should be use only for struct/enum members.
 173 #
 174 # You can also add additional sections. When documenting kernel functions you
 175 # should document the "Context:" of the function, e.g. whether the functions
 176 # can be called form interrupts. Unlike other sections you can end it with an
 177 # empty line.
 178 # A non-void function should have a "Return:" section describing the return
 179 # value(s).
 180 # Example-sections should contain the string EXAMPLE so that they are marked
 181 # appropriately in DocBook.
 182 #
 183 # Example:
 184 # /**
 185 #  * user_function - function that can only be called in user context
 186 #  * @a: some argument
 187 #  * Context: !in_interrupt()
 188 #  *
 189 #  * Some description
 190 #  * Example:
 191 #  *    user_function(22);
 192 #  */
 193 # ...
 194 #
 195 #
 196 # All descriptive text is further processed, scanning for the following special
 197 # patterns, which are highlighted appropriately.
 198 #
 199 # 'funcname()' - function
 200 # '$ENVVAR' - environmental variable
 201 # '&struct_name' - name of a structure (up to two words including 'struct')
 202 # '&struct_name.member' - name of a structure member
 203 # '@parameter' - name of a parameter
 204 # '%CONST' - name of a constant.
 205 # '``LITERAL``' - literal string without any spaces on it.
 206
 207 ## init lots of data
 208
 209 my $errors = 0;
 210 my $warnings = 0;
 211 my $anon_struct_union = 0;
 212
 213 # match expressions used to find embedded type information
 214 my $type_constant = '\b``([^\`]+)``\b';
 215 my $type_constant2 = '\%([-_\w]+)';
 216 my $type_func = '(\w+)\(\)';
 217 my $type_param = '\@(\w*((\.\w+)|(->\w+))*(\.\.\.)?)';
 218 my $type_fp_param = '\@(\w+)\(\)';  # Special RST handling for func ptr params
 219 my $type_env = '(\$\w+)';
 220 my $type_enum = '#(enum\s*([_\w]+))';
 221 my $type_struct = '#(struct\s*([_\w]+))';
 222 my $type_typedef = '#(([A-Z][_\w]*))';
 223 my $type_union = '#(union\s*([_\w]+))';
 224 my $type_member = '#([_\w]+)(\.|->)([_\w]+)';
 225 my $type_fallback = '(?!)';    # this never matches
 226 my $type_member_func = $type_member . '\(\)';
 227
 228 # Output conversion substitutions.
 229 #  One for each output format
 230
 231 # these are pretty rough
 232 my @highlights_man = (
 233                       [$type_constant, "\$1"],
 234                       [$type_constant2, "\$1"],
 235                       [$type_func, "\\\\fB\$1\\\\fP"],
 236                       [$type_enum, "\\\\fI\$1\\\\fP"],
 237                       [$type_struct, "\\\\fI\$1\\\\fP"],
 238                       [$type_typedef, "\\\\fI\$1\\\\fP"],
 239                       [$type_union, "\\\\fI\$1\\\\fP"],
 240                       [$type_param, "\\\\fI\$1\\\\fP"],
 241                       [$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
 242                       [$type_fallback, "\\\\fI\$1\\\\fP"]
 243                      );
 244 my $blankline_man = "";
 245
 246 # rst-mode
 247 my @highlights_rst = (
 248                        [$type_constant, "``\$1``"],
 249                        [$type_constant2, "``\$1``"],
 250                        # Note: need to escape () to avoid func matching later
 251                        [$type_member_func, "\\:c\\:type\\:`\$1\$2\$3\\\\(\\\\) <\$1>`"],
 252                        [$type_member, "\\:c\\:type\\:`\$1\$2\$3 <\$1>`"],
 253                        [$type_fp_param, "**\$1\\\\(\\\\)**"],
 254                        [$type_func, "\$1()"],
 255                        [$type_enum, "\\:c\\:type\\:`\$1 <\$2>`"],
 256                        [$type_struct, "\\:c\\:type\\:`\$1 <\$2>`"],
 257                        [$type_typedef, "\\:c\\:type\\:`\$1 <\$2>`"],
 258                        [$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
 259                        # in rst this can refer to any type
 260                        [$type_fallback, "\\:c\\:type\\:`\$1`"],
 261                        [$type_param, "**\$1**"]
 262                       );
 263 my $blankline_rst = "\n";
 264
 265 # read arguments
 266 if ($#ARGV == -1) {
 267     usage();
 268 }
 269
 270 my $kernelversion;
 271 my $dohighlight = "";
 272
 273 my $verbose = 0;
 274 my $output_mode = "rst";
 275 my $output_preformatted = 0;
 276 my $no_doc_sections = 0;
 277 my $enable_lineno = 0;
 278 my @highlights = @highlights_rst;
 279 my $blankline = $blankline_rst;
 280 my $modulename = "Kernel API";
 281
 282 use constant {
 283     OUTPUT_ALL          => 0, # output all symbols and doc sections
 284     OUTPUT_INCLUDE      => 1, # output only specified symbols
 285     OUTPUT_EXCLUDE      => 2, # output everything except specified symbols
 286     OUTPUT_EXPORTED     => 3, # output exported symbols
 287     OUTPUT_INTERNAL     => 4, # output non-exported symbols
 288 };
 289 my $output_selection = OUTPUT_ALL;
 290 my $show_not_found = 0; # No longer used
 291 my $sphinx_version = "0.0"; # if not specified, assume old
 292
 293 my @export_file_list;
 294
 295 my @build_time;
 296 if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
 297     (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
 298     @build_time = gmtime($seconds);
 299 } else {
 300     @build_time = localtime;
 301 }
 302
 303 my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
 304                 'July', 'August', 'September', 'October',
 305                 'November', 'December')[$build_time[4]] .
 306   " " . ($build_time[5]+1900);
 307
 308 # Essentially these are globals.
 309 # They probably want to be tidied up, made more localised or something.
 310 # CAVEAT EMPTOR!  Some of the others I localised may not want to be, which
 311 # could cause "use of undefined value" or other bugs.
 312 my ($function, %function_table, %parametertypes, $declaration_purpose);
 313 my $declaration_start_line;
 314 my ($type, $declaration_name, $return_type);
 315 my ($newsection, $newcontents, $prototype, $brcount, %source_map);
 316
 317 if (defined($ENV{'KBUILD_VERBOSE'})) {
 318         $verbose = "$ENV{'KBUILD_VERBOSE'}";
 319 }
 320
 321 # Generated docbook code is inserted in a template at a point where
 322 # docbook v3.1 requires a non-zero sequence of RefEntry's; see:
 323 # http://www.oasis-open.org/docbook/documentation/reference/html/refentry.html
 324 # We keep track of number of generated entries and generate a dummy
 325 # if needs be to ensure the expanded template can be postprocessed
 326 # into html.
 327 my $section_counter = 0;
 328
 329 my $lineprefix="";
 330
 331 # Parser states
 332 use constant {
 333     STATE_NORMAL        => 0, # normal code
 334     STATE_NAME          => 1, # looking for function name
 335     STATE_BODY_MAYBE    => 2, # body - or maybe more description
 336     STATE_BODY          => 3, # the body of the comment
 337     STATE_PROTO         => 4, # scanning prototype
 338     STATE_DOCBLOCK      => 5, # documentation block
 339     STATE_INLINE        => 6, # gathering documentation outside main block
 340 };
 341 my $state;
 342 my $in_doc_sect;
 343 my $leading_space;
 344
 345 # Inline documentation state
 346 use constant {
 347     STATE_INLINE_NA     => 0, # not applicable ($state != STATE_INLINE)
 348     STATE_INLINE_NAME   => 1, # looking for member name (@foo:)
 349     STATE_INLINE_TEXT   => 2, # looking for member documentation
 350     STATE_INLINE_END    => 3, # done
 351     STATE_INLINE_ERROR  => 4, # error - Comment without header was found.
 352                               # Spit a warning as it's not
 353                               # proper kernel-doc and ignore the rest.
 354 };
 355 my $inline_doc_state;
 356
 357 #declaration types: can be
 358 # 'function', 'struct', 'union', 'enum', 'typedef'
 359 my $decl_type;
 360
 361 my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
 362 my $doc_end = '\*/';
 363 my $doc_com = '\s*\*\s*';
 364 my $doc_com_body = '\s*\* ?';
 365 my $doc_decl = $doc_com . '(\w+)';
 366 # @params and a strictly limited set of supported section names
 367 my $doc_sect = $doc_com .
 368     '\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:(.*)';
 369 my $doc_content = $doc_com_body . '(.*)';
 370 my $doc_block = $doc_com . 'DOC:\s*(.*)?';
 371 my $doc_inline_start = '^\s*/\*\*\s*$';
 372 my $doc_inline_sect = '\s*\*\s*(@\s*[\w][\w\.]*\s*):(.*)';
 373 my $doc_inline_end = '^\s*\*/\s*$';
 374 my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
 375 my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
 376
 377 my %parameterdescs;
 378 my %parameterdesc_start_lines;
 379 my @parameterlist;
 380 my %sections;
 381 my @sectionlist;
 382 my %section_start_lines;
 383 my $sectcheck;
 384 my $struct_actual;
 385
 386 my $contents = "";
 387 my $new_start_line = 0;
 388
 389 # the canonical section names. see also $doc_sect above.
 390 my $section_default = "Description";    # default section
 391 my $section_intro = "Introduction";
 392 my $section = $section_default;
 393 my $section_context = "Context";
 394 my $section_return = "Return";
 395
 396 my $undescribed = "-- undescribed --";
 397
 398 reset_state();
 399
 400 while ($ARGV[0] =~ m/^--?(.*)/) {
 401     my $cmd = $1;
 402     shift @ARGV;
 403     if ($cmd eq "man") {
 404         $output_mode = "man";
 405         @highlights = @highlights_man;
 406         $blankline = $blankline_man;
 407     } elsif ($cmd eq "rst") {
 408         $output_mode = "rst";
 409         @highlights = @highlights_rst;
 410         $blankline = $blankline_rst;
 411     } elsif ($cmd eq "none") {
 412         $output_mode = "none";
 413     } elsif ($cmd eq "module") { # not needed for XML, inherits from calling document
 414         $modulename = shift @ARGV;
 415     } elsif ($cmd eq "function") { # to only output specific functions
 416         $output_selection = OUTPUT_INCLUDE;
 417         $function = shift @ARGV;
 418         $function_table{$function} = 1;
 419     } elsif ($cmd eq "nofunction") { # output all except specific functions
 420         $output_selection = OUTPUT_EXCLUDE;
 421         $function = shift @ARGV;
 422         $function_table{$function} = 1;
 423     } elsif ($cmd eq "export") { # only exported symbols
 424         $output_selection = OUTPUT_EXPORTED;
 425         %function_table = ();
 426     } elsif ($cmd eq "internal") { # only non-exported symbols
 427         $output_selection = OUTPUT_INTERNAL;
 428         %function_table = ();
 429     } elsif ($cmd eq "export-file") {
 430         my $file = shift @ARGV;
 431         push(@export_file_list, $file);
 432     } elsif ($cmd eq "v") {
 433         $verbose = 1;
 434     } elsif (($cmd eq "h") || ($cmd eq "help")) {
 435         usage();
 436     } elsif ($cmd eq 'no-doc-sections') {
 437             $no_doc_sections = 1;
 438     } elsif ($cmd eq 'enable-lineno') {
 439             $enable_lineno = 1;
 440     } elsif ($cmd eq 'show-not-found') {
 441         $show_not_found = 1;  # A no-op but don't fail
 442     } elsif ($cmd eq 'sphinx-version') {
 443         $sphinx_version = shift @ARGV;
 444     } else {
 445         # Unknown argument
 446         usage();
 447     }
 448 }
 449
 450 # continue execution near EOF;
 451
 452 # get kernel version from env
 453 sub get_kernel_version() {
 454     my $version = 'unknown kernel version';
 455
 456     if (defined($ENV{'KERNELVERSION'})) {
 457         $version = $ENV{'KERNELVERSION'};
 458     }
 459     return $version;
 460 }
 461
 462 #
 463 sub print_lineno {
 464     my $lineno = shift;
 465     if ($enable_lineno && defined($lineno)) {
 466         print "#define LINENO " . $lineno . "\n";
 467     }
 468 }
 469 ##
 470 # dumps section contents to arrays/hashes intended for that purpose.
 471 #
 472 sub dump_section {
 473     my $file = shift;
 474     my $name = shift;
 475     my $contents = join "\n", @_;
 476
 477     if ($name =~ m/$type_param/) {
 478         $name = $1;
 479         $parameterdescs{$name} = $contents;
 480         $sectcheck = $sectcheck . $name . " ";
 481         $parameterdesc_start_lines{$name} = $new_start_line;
 482         $new_start_line = 0;
 483     } elsif ($name eq "@\.\.\.") {
 484         $name = "...";
 485         $parameterdescs{$name} = $contents;
 486         $sectcheck = $sectcheck . $name . " ";
 487         $parameterdesc_start_lines{$name} = $new_start_line;
 488         $new_start_line = 0;
 489     } else {
 490         if (defined($sections{$name}) && ($sections{$name} ne "")) {
 491             # Only warn on user specified duplicate section names.
 492             if ($name ne $section_default) {
 493                 print STDERR "${file}:$.: warning: duplicate section name '$name'\n";
 494                 ++$warnings;
 495             }
 496             $sections{$name} .= $contents;
 497         } else {
 498             $sections{$name} = $contents;
 499             push @sectionlist, $name;
 500             $section_start_lines{$name} = $new_start_line;
 501             $new_start_line = 0;
 502         }
 503     }
 504 }
 505
 506 ##
 507 # dump DOC: section after checking that it should go out
 508 #
 509 sub dump_doc_section {
 510     my $file = shift;
 511     my $name = shift;
 512     my $contents = join "\n", @_;
 513
 514     if ($no_doc_sections) {
 515         return;
 516     }
 517
 518     if (($output_selection == OUTPUT_ALL) ||
 519         ($output_selection == OUTPUT_INCLUDE &&
 520          defined($function_table{$name})) ||
 521         ($output_selection == OUTPUT_EXCLUDE &&
 522          !defined($function_table{$name})))
 523     {
 524         dump_section($file, $name, $contents);
 525         output_blockhead({'sectionlist' => \@sectionlist,
 526                           'sections' => \%sections,
 527                           'module' => $modulename,
 528                           'content-only' => ($output_selection != OUTPUT_ALL), });
 529     }
 530 }
 531
 532 ##
 533 # output function
 534 #
 535 # parameterdescs, a hash.
 536 #  function => "function name"
 537 #  parameterlist => @list of parameters
 538 #  parameterdescs => %parameter descriptions
 539 #  sectionlist => @list of sections
 540 #  sections => %section descriptions
 541 #
 542
 543 sub output_highlight {
 544     my $contents = join "\n",@_;
 545     my $line;
 546
 547 #   DEBUG
 548 #   if (!defined $contents) {
 549 #       use Carp;
 550 #       confess "output_highlight got called with no args?\n";
 551 #   }
 552
 553 #   print STDERR "contents b4:$contents\n";
 554     eval $dohighlight;
 555     die $@ if $@;
 556 #   print STDERR "contents af:$contents\n";
 557
 558     foreach $line (split "\n", $contents) {
 559         if (! $output_preformatted) {
 560             $line =~ s/^\s*//;
 561         }
 562         if ($line eq ""){
 563             if (! $output_preformatted) {
 564                 print $lineprefix, $blankline;
 565             }
 566         } else {
 567             if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
 568                 print "\\&$line";
 569             } else {
 570                 print $lineprefix, $line;
 571             }
 572         }
 573         print "\n";
 574     }
 575 }
 576
 577 ##
 578 # output function in man
 579 sub output_function_man(%) {
 580     my %args = %{$_[0]};
 581     my ($parameter, $section);
 582     my $count;
 583
 584     print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
 585
 586     print ".SH NAME\n";
 587     print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
 588
 589     print ".SH SYNOPSIS\n";
 590     if ($args{'functiontype'} ne "") {
 591         print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
 592     } else {
 593         print ".B \"" . $args{'function'} . "\n";
 594     }
 595     $count = 0;
 596     my $parenth = "(";
 597     my $post = ",";
 598     foreach my $parameter (@{$args{'parameterlist'}}) {
 599         if ($count == $#{$args{'parameterlist'}}) {
 600             $post = ");";
 601         }
 602         $type = $args{'parametertypes'}{$parameter};
 603         if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
 604             # pointer-to-function
 605             print ".BI \"" . $parenth . $1 . "\" " . $parameter . " \") (" . $2 . ")" . $post . "\"\n";
 606         } else {
 607             $type =~ s/([^\*])$/$1 /;
 608             print ".BI \"" . $parenth . $type . "\" " . $parameter . " \"" . $post . "\"\n";
 609         }
 610         $count++;
 611         $parenth = "";
 612     }
 613
 614     print ".SH ARGUMENTS\n";
 615     foreach $parameter (@{$args{'parameterlist'}}) {
 616         my $parameter_name = $parameter;
 617         $parameter_name =~ s/\[.*//;
 618
 619         print ".IP \"" . $parameter . "\" 12\n";
 620         output_highlight($args{'parameterdescs'}{$parameter_name});
 621     }
 622     foreach $section (@{$args{'sectionlist'}}) {
 623         print ".SH \"", uc $section, "\"\n";
 624         output_highlight($args{'sections'}{$section});
 625     }
 626 }
 627
 628 ##
 629 # output enum in man
 630 sub output_enum_man(%) {
 631     my %args = %{$_[0]};
 632     my ($parameter, $section);
 633     my $count;
 634
 635     print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
 636
 637     print ".SH NAME\n";
 638     print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
 639
 640     print ".SH SYNOPSIS\n";
 641     print "enum " . $args{'enum'} . " {\n";
 642     $count = 0;
 643     foreach my $parameter (@{$args{'parameterlist'}}) {
 644         print ".br\n.BI \"    $parameter\"\n";
 645         if ($count == $#{$args{'parameterlist'}}) {
 646             print "\n};\n";
 647             last;
 648         }
 649         else {
 650             print ", \n.br\n";
 651         }
 652         $count++;
 653     }
 654
 655     print ".SH Constants\n";
 656     foreach $parameter (@{$args{'parameterlist'}}) {
 657         my $parameter_name = $parameter;
 658         $parameter_name =~ s/\[.*//;
 659
 660         print ".IP \"" . $parameter . "\" 12\n";
 661         output_highlight($args{'parameterdescs'}{$parameter_name});
 662     }
 663     foreach $section (@{$args{'sectionlist'}}) {
 664         print ".SH \"$section\"\n";
 665         output_highlight($args{'sections'}{$section});
 666     }
 667 }
 668
 669 ##
 670 # output struct in man
 671 sub output_struct_man(%) {
 672     my %args = %{$_[0]};
 673     my ($parameter, $section);
 674
 675     print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
 676
 677     print ".SH NAME\n";
 678     print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
 679
 680     my $declaration = $args{'definition'};
 681     $declaration =~ s/\t/  /g;
 682     $declaration =~ s/\n/"\n.br\n.BI \"/g;
 683     print ".SH SYNOPSIS\n";
 684     print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
 685     print ".BI \"$declaration\n};\n.br\n\n";
 686
 687     print ".SH Members\n";
 688     foreach $parameter (@{$args{'parameterlist'}}) {
 689         ($parameter =~ /^#/) && next;
 690
 691         my $parameter_name = $parameter;
 692         $parameter_name =~ s/\[.*//;
 693
 694         ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
 695         print ".IP \"" . $parameter . "\" 12\n";
 696         output_highlight($args{'parameterdescs'}{$parameter_name});
 697     }
 698     foreach $section (@{$args{'sectionlist'}}) {
 699         print ".SH \"$section\"\n";
 700         output_highlight($args{'sections'}{$section});
 701     }
 702 }
 703
 704 ##
 705 # output typedef in man
 706 sub output_typedef_man(%) {
 707     my %args = %{$_[0]};
 708     my ($parameter, $section);
 709
 710     print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
 711
 712     print ".SH NAME\n";
 713     print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
 714
 715     foreach $section (@{$args{'sectionlist'}}) {
 716         print ".SH \"$section\"\n";
 717         output_highlight($args{'sections'}{$section});
 718     }
 719 }
 720
 721 sub output_blockhead_man(%) {
 722     my %args = %{$_[0]};
 723     my ($parameter, $section);
 724     my $count;
 725
 726     print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
 727
 728     foreach $section (@{$args{'sectionlist'}}) {
 729         print ".SH \"$section\"\n";
 730         output_highlight($args{'sections'}{$section});
 731     }
 732 }
 733
 734 ##
 735 # output in restructured text
 736 #
 737
 738 #
 739 # This could use some work; it's used to output the DOC: sections, and
 740 # starts by putting out the name of the doc section itself, but that tends
 741 # to duplicate a header already in the template file.
 742 #
 743 sub output_blockhead_rst(%) {
 744     my %args = %{$_[0]};
 745     my ($parameter, $section);
 746
 747     foreach $section (@{$args{'sectionlist'}}) {
 748         if ($output_selection != OUTPUT_INCLUDE) {
 749             print "**$section**\n\n";
 750         }
 751         print_lineno($section_start_lines{$section});
 752         output_highlight_rst($args{'sections'}{$section});
 753         print "\n";
 754     }
 755 }
 756
 757 #
 758 # Apply the RST highlights to a sub-block of text.
 759 #
 760 sub highlight_block($) {
 761     # The dohighlight kludge requires the text be called $contents
 762     my $contents = shift;
 763     eval $dohighlight;
 764     die $@ if $@;
 765     return $contents;
 766 }
 767
 768 #
 769 # Regexes used only here.
 770 #
 771 my $sphinx_literal = '^[^.].*::$';
 772 my $sphinx_cblock = '^\.\.\ +code-block::';
 773
 774 sub output_highlight_rst {
 775     my $input = join "\n",@_;
 776     my $output = "";
 777     my $line;
 778     my $in_literal = 0;
 779     my $litprefix;
 780     my $block = "";
 781
 782     foreach $line (split "\n",$input) {
 783         #
 784         # If we're in a literal block, see if we should drop out
 785         # of it.  Otherwise pass the line straight through unmunged.
 786         #
 787         if ($in_literal) {
 788             if (! ($line =~ /^\s*$/)) {
 789                 #
 790                 # If this is the first non-blank line in a literal
 791                 # block we need to figure out what the proper indent is.
 792                 #
 793                 if ($litprefix eq "") {
 794                     $line =~ /^(\s*)/;
 795                     $litprefix = '^' . $1;
 796                     $output .= $line . "\n";
 797                 } elsif (! ($line =~ /$litprefix/)) {
 798                     $in_literal = 0;
 799                 } else {
 800                     $output .= $line . "\n";
 801                 }
 802             } else {
 803                 $output .= $line . "\n";
 804             }
 805         }
 806         #
 807         # Not in a literal block (or just dropped out)
 808         #
 809         if (! $in_literal) {
 810             $block .= $line . "\n";
 811             if (($line =~ /$sphinx_literal/) || ($line =~ /$sphinx_cblock/)) {
 812                 $in_literal = 1;
 813                 $litprefix = "";
 814                 $output .= highlight_block($block);
 815                 $block = ""
 816             }
 817         }
 818     }
 819
 820     if ($block) {
 821         $output .= highlight_block($block);
 822     }
 823     foreach $line (split "\n", $output) {
 824         print $lineprefix . $line . "\n";
 825     }
 826 }
 827
 828 sub output_function_rst(%) {
 829     my %args = %{$_[0]};
 830     my ($parameter, $section);
 831     my $oldprefix = $lineprefix;
 832     my $start = "";
 833
 834     if ($args{'typedef'}) {
 835         print ".. c:type:: ". $args{'function'} . "\n\n";
 836         print_lineno($declaration_start_line);
 837         print "   **Typedef**: ";
 838         $lineprefix = "";
 839         output_highlight_rst($args{'purpose'});
 840         $start = "\n\n**Syntax**\n\n  ``";
 841     } else {
 842         print ".. c:function:: ";
 843     }
 844     if ($args{'functiontype'} ne "") {
 845         $start .= $args{'functiontype'} . " " . $args{'function'} . " (";
 846     } else {
 847         $start .= $args{'function'} . " (";
 848     }
 849     print $start;
 850
 851     my $count = 0;
 852     foreach my $parameter (@{$args{'parameterlist'}}) {
 853         if ($count ne 0) {
 854             print ", ";
 855         }
 856         $count++;
 857         $type = $args{'parametertypes'}{$parameter};
 858
 859         if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
 860             # pointer-to-function
 861             print $1 . $parameter . ") (" . $2 . ")";
 862         } else {
 863             print $type . " " . $parameter;
 864         }
 865     }
 866     if ($args{'typedef'}) {
 867         print ");``\n\n";
 868     } else {
 869         print ")\n\n";
 870         print_lineno($declaration_start_line);
 871         $lineprefix = "   ";
 872         output_highlight_rst($args{'purpose'});
 873         print "\n";
 874     }
 875
 876     print "**Parameters**\n\n";
 877     $lineprefix = "  ";
 878     foreach $parameter (@{$args{'parameterlist'}}) {
 879         my $parameter_name = $parameter;
 880         $parameter_name =~ s/\[.*//;
 881         $type = $args{'parametertypes'}{$parameter};
 882
 883         if ($type ne "") {
 884             print "``$type $parameter``\n";
 885         } else {
 886             print "``$parameter``\n";
 887         }
 888
 889         print_lineno($parameterdesc_start_lines{$parameter_name});
 890
 891         if (defined($args{'parameterdescs'}{$parameter_name}) &&
 892             $args{'parameterdescs'}{$parameter_name} ne $undescribed) {
 893             output_highlight_rst($args{'parameterdescs'}{$parameter_name});
 894         } else {
 895             print "  *undescribed*\n";
 896         }
 897         print "\n";
 898     }
 899
 900     $lineprefix = $oldprefix;
 901     output_section_rst(@_);
 902 }
 903
 904 sub output_section_rst(%) {
 905     my %args = %{$_[0]};
 906     my $section;
 907     my $oldprefix = $lineprefix;
 908     $lineprefix = "";
 909
 910     foreach $section (@{$args{'sectionlist'}}) {
 911         print "**$section**\n\n";
 912         print_lineno($section_start_lines{$section});
 913         output_highlight_rst($args{'sections'}{$section});
 914         print "\n";
 915     }
 916     print "\n";
 917     $lineprefix = $oldprefix;
 918 }
 919
 920 sub output_enum_rst(%) {
 921     my %args = %{$_[0]};
 922     my ($parameter);
 923     my $oldprefix = $lineprefix;
 924     my $count;
 925     my $name = "enum " . $args{'enum'};
 926
 927     print "\n\n.. c:type:: " . $name . "\n\n";
 928     print_lineno($declaration_start_line);
 929     $lineprefix = "   ";
 930     output_highlight_rst($args{'purpose'});
 931     print "\n";
 932
 933     print "**Constants**\n\n";
 934     $lineprefix = "  ";
 935     foreach $parameter (@{$args{'parameterlist'}}) {
 936         print "``$parameter``\n";
 937         if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
 938             output_highlight_rst($args{'parameterdescs'}{$parameter});
 939         } else {
 940             print "  *undescribed*\n";
 941         }
 942         print "\n";
 943     }
 944
 945     $lineprefix = $oldprefix;
 946     output_section_rst(@_);
 947 }
 948
 949 sub output_typedef_rst(%) {
 950     my %args = %{$_[0]};
 951     my ($parameter);
 952     my $oldprefix = $lineprefix;
 953     my $name = "typedef " . $args{'typedef'};
 954
 955     print "\n\n.. c:type:: " . $name . "\n\n";
 956     print_lineno($declaration_start_line);
 957     $lineprefix = "   ";
 958     output_highlight_rst($args{'purpose'});
 959     print "\n";
 960
 961     $lineprefix = $oldprefix;
 962     output_section_rst(@_);
 963 }
 964
 965 sub output_struct_rst(%) {
 966     my %args = %{$_[0]};
 967     my ($parameter);
 968     my $oldprefix = $lineprefix;
 969     my $name = $args{'type'} . " " . $args{'struct'};
 970
 971     # Sphinx 3.0 and up will emit warnings for "c:type:: struct Foo".
 972     # It wants to see "c:struct:: Foo" (and will add the word 'struct' in
 973     # the rendered output).
 974     if ((split(/\./, $sphinx_version))[0] >= 3) {
 975         my $sname = $name;
 976         $sname =~ s/^struct //;
 977         print "\n\n.. c:struct:: " . $sname . "\n\n";
 978     } else {
 979         print "\n\n.. c:type:: " . $name . "\n\n";
 980     }
 981     print_lineno($declaration_start_line);
 982     $lineprefix = "   ";
 983     output_highlight_rst($args{'purpose'});
 984     print "\n";
 985
 986     print "**Definition**\n\n";
 987     print "::\n\n";
 988     my $declaration = $args{'definition'};
 989     $declaration =~ s/\t/  /g;
 990     print "  " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration  };\n\n";
 991
 992     print "**Members**\n\n";
 993     $lineprefix = "  ";
 994     foreach $parameter (@{$args{'parameterlist'}}) {
 995         ($parameter =~ /^#/) && next;
 996
 997         my $parameter_name = $parameter;
 998         $parameter_name =~ s/\[.*//;
 999
1000         ($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
1001         $type = $args{'parametertypes'}{$parameter};
1002         print_lineno($parameterdesc_start_lines{$parameter_name});
1003         print "``" . $parameter . "``\n";
1004         output_highlight_rst($args{'parameterdescs'}{$parameter_name});
1005         print "\n";
1006     }
1007     print "\n";
1008
1009     $lineprefix = $oldprefix;
1010     output_section_rst(@_);
1011 }
1012
1013 ## none mode output functions
1014
1015 sub output_function_none(%) {
1016 }
1017
1018 sub output_enum_none(%) {
1019 }
1020
1021 sub output_typedef_none(%) {
1022 }
1023
1024 sub output_struct_none(%) {
1025 }
1026
1027 sub output_blockhead_none(%) {
1028 }
1029
1030 ##
1031 # generic output function for all types (function, struct/union, typedef, enum);
1032 # calls the generated, variable output_ function name based on
1033 # functype and output_mode
1034 sub output_declaration {
1035     no strict 'refs';
1036     my $name = shift;
1037     my $functype = shift;
1038     my $func = "output_${functype}_$output_mode";
1039     if (($output_selection == OUTPUT_ALL) ||
1040         (($output_selection == OUTPUT_INCLUDE ||
1041           $output_selection == OUTPUT_EXPORTED) &&
1042          defined($function_table{$name})) ||
1043         (($output_selection == OUTPUT_EXCLUDE ||
1044           $output_selection == OUTPUT_INTERNAL) &&
1045          !($functype eq "function" && defined($function_table{$name}))))
1046     {
1047         &$func(@_);
1048         $section_counter++;
1049     }
1050 }
1051
1052 ##
1053 # generic output function - calls the right one based on current output mode.
1054 sub output_blockhead {
1055     no strict 'refs';
1056     my $func = "output_blockhead_" . $output_mode;
1057     &$func(@_);
1058     $section_counter++;
1059 }
1060
1061 ##
1062 # takes a declaration (struct, union, enum, typedef) and
1063 # invokes the right handler. NOT called for functions.
1064 sub dump_declaration($$) {
1065     no strict 'refs';
1066     my ($prototype, $file) = @_;
1067     if ($decl_type eq 'type name') {
1068        if ($prototype =~ /^(enum|struct|union)\s+/) {
1069            $decl_type = $1;
1070         } else {
1071            return;
1072        }
1073     }
1074
1075     my $func = "dump_" . $decl_type;
1076     &$func(@_);
1077 }
1078
1079 sub dump_union($$) {
1080     dump_struct(@_);
1081 }
1082
1083 sub dump_struct($$) {
1084     my $x = shift;
1085     my $file = shift;
1086
1087     if ($x =~ /(struct|union)\s+(\w+)\s*\{(.*)\}(\s*(__packed|__aligned|__attribute__\s*\(\([a-z0-9,_\s\(\)]*\)\)))*/) {
1088         my $decl_type = $1;
1089         $declaration_name = $2;
1090         my $members = $3;
1091
1092         # ignore members marked private:
1093         $members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
1094         $members =~ s/\/\*\s*private:.*//gosi;
1095         # strip comments:
1096         $members =~ s/\/\*.*?\*\///gos;
1097         # strip attributes
1098         $members =~ s/\s*__attribute__\s*\(\([a-z0-9,_\*\s\(\)]*\)\)//gi;
1099         $members =~ s/\s*__aligned\s*\([^;]*\)//gos;
1100         $members =~ s/\s*__packed\s*//gos;
1101         $members =~ s/\s*CRYPTO_MINALIGN_ATTR//gos;
1102         # replace DECLARE_BITMAP
1103         $members =~ s/DECLARE_BITMAP\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
1104         # replace DECLARE_HASHTABLE
1105         $members =~ s/DECLARE_HASHTABLE\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
1106         # replace DECLARE_KFIFO
1107         $members =~ s/DECLARE_KFIFO\s*\(([^,)]+),\s*([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
1108         # replace DECLARE_KFIFO_PTR
1109         $members =~ s/DECLARE_KFIFO_PTR\s*\(([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
1110
1111         my $declaration = $members;
1112
1113         # Split nested struct/union elements as newer ones
1114         while ($members =~ m/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/) {
1115                 my $newmember;
1116                 my $maintype = $1;
1117                 my $ids = $4;
1118                 my $content = $3;
1119                 foreach my $id(split /,/, $ids) {
1120                         $newmember .= "$maintype $id; ";
1121
1122                         $id =~ s/[:\[].*//;
1123                         $id =~ s/^\s*\**(\S+)\s*/$1/;
1124                         foreach my $arg (split /;/, $content) {
1125                                 next if ($arg =~ m/^\s*$/);
1126                                 if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
1127                                         # pointer-to-function
1128                                         my $type = $1;
1129                                         my $name = $2;
1130                                         my $extra = $3;
1131                                         next if (!$name);
1132                                         if ($id =~ m/^\s*$/) {
1133                                                 # anonymous struct/union
1134                                                 $newmember .= "$type$name$extra; ";
1135                                         } else {
1136                                                 $newmember .= "$type$id.$name$extra; ";
1137                                         }
1138                                 } else {
1139                                         my $type;
1140                                         my $names;
1141                                         $arg =~ s/^\s+//;
1142                                         $arg =~ s/\s+$//;
1143                                         # Handle bitmaps
1144                                         $arg =~ s/:\s*\d+\s*//g;
1145                                         # Handle arrays
1146                                         $arg =~ s/\[.*\]//g;
1147                                         # The type may have multiple words,
1148                                         # and multiple IDs can be defined, like:
1149                                         #       const struct foo, *bar, foobar
1150                                         # So, we remove spaces when parsing the
1151                                         # names, in order to match just names
1152                                         # and commas for the names
1153                                         $arg =~ s/\s*,\s*/,/g;
1154                                         if ($arg =~ m/(.*)\s+([\S+,]+)/) {
1155                                                 $type = $1;
1156                                                 $names = $2;
1157                                         } else {
1158                                                 $newmember .= "$arg; ";
1159                                                 next;
1160                                         }
1161                                         foreach my $name (split /,/, $names) {
1162                                                 $name =~ s/^\s*\**(\S+)\s*/$1/;
1163                                                 next if (($name =~ m/^\s*$/));
1164                                                 if ($id =~ m/^\s*$/) {
1165                                                         # anonymous struct/union
1166                                                         $newmember .= "$type $name; ";
1167                                                 } else {
1168                                                         $newmember .= "$type $id.$name; ";
1169                                                 }
1170                                         }
1171                                 }
1172                         }
1173                 }
1174                 $members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/$newmember/;
1175         }
1176
1177         # Ignore other nested elements, like enums
1178         $members =~ s/(\{[^\{\}]*\})//g;
1179
1180         create_parameterlist($members, ';', $file, $declaration_name);
1181         check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual);
1182
1183         # Adjust declaration for better display
1184         $declaration =~ s/([\{;])/$1\n/g;
1185         $declaration =~ s/\}\s+;/};/g;
1186         # Better handle inlined enums
1187         do {} while ($declaration =~ s/(enum\s+\{[^\}]+),([^\n])/$1,\n$2/);
1188
1189         my @def_args = split /\n/, $declaration;
1190         my $level = 1;
1191         $declaration = "";
1192         foreach my $clause (@def_args) {
1193                 $clause =~ s/^\s+//;
1194                 $clause =~ s/\s+$//;
1195                 $clause =~ s/\s+/ /;
1196                 next if (!$clause);
1197                 $level-- if ($clause =~ m/(\})/ && $level > 1);
1198                 if (!($clause =~ m/^\s*#/)) {
1199                         $declaration .= "\t" x $level;
1200                 }
1201                 $declaration .= "\t" . $clause . "\n";
1202                 $level++ if ($clause =~ m/(\{)/ && !($clause =~m/\}/));
1203         }
1204         output_declaration($declaration_name,
1205                            'struct',
1206                            {'struct' => $declaration_name,
1207                             'module' => $modulename,
1208                             'definition' => $declaration,
1209                             'parameterlist' => \@parameterlist,
1210                             'parameterdescs' => \%parameterdescs,
1211                             'parametertypes' => \%parametertypes,
1212                             'sectionlist' => \@sectionlist,
1213                             'sections' => \%sections,
1214                             'purpose' => $declaration_purpose,
1215                             'type' => $decl_type
1216                            });
1217     }
1218     else {
1219         print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
1220         ++$errors;
1221     }
1222 }
1223
1224
1225 sub show_warnings($$) {
1226         my $functype = shift;
1227         my $name = shift;
1228
1229         return 1 if ($output_selection == OUTPUT_ALL);
1230
1231         if ($output_selection == OUTPUT_EXPORTED) {
1232                 if (defined($function_table{$name})) {
1233                         return 1;
1234                 } else {
1235                         return 0;
1236                 }
1237         }
1238         if ($output_selection == OUTPUT_INTERNAL) {
1239                 if (!($functype eq "function" && defined($function_table{$name}))) {
1240                         return 1;
1241                 } else {
1242                         return 0;
1243                 }
1244         }
1245         if ($output_selection == OUTPUT_INCLUDE) {
1246                 if (defined($function_table{$name})) {
1247                         return 1;
1248                 } else {
1249                         return 0;
1250                 }
1251         }
1252         if ($output_selection == OUTPUT_EXCLUDE) {
1253                 if (!defined($function_table{$name})) {
1254                         return 1;
1255                 } else {
1256                         return 0;
1257                 }
1258         }
1259         die("Please add the new output type at show_warnings()");
1260 }
1261
1262 sub dump_enum($$) {
1263     my $x = shift;
1264     my $file = shift;
1265
1266     $x =~ s@/\*.*?\*/@@gos;     # strip comments.
1267     # strip #define macros inside enums
1268     $x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
1269
1270     if ($x =~ /enum\s+(\w*)\s*\{(.*)\}/) {
1271         $declaration_name = $1;
1272         my $members = $2;
1273         my %_members;
1274
1275         $members =~ s/\s+$//;
1276
1277         foreach my $arg (split ',', $members) {
1278             $arg =~ s/^\s*(\w+).*/$1/;
1279             push @parameterlist, $arg;
1280             if (!$parameterdescs{$arg}) {
1281                 $parameterdescs{$arg} = $undescribed;
1282                 if (show_warnings("enum", $declaration_name)) {
1283                         print STDERR "${file}:$.: warning: Enum value '$arg' not described in enum '$declaration_name'\n";
1284                 }
1285             }
1286             $_members{$arg} = 1;
1287         }
1288
1289         while (my ($k, $v) = each %parameterdescs) {
1290             if (!exists($_members{$k})) {
1291                 if (show_warnings("enum", $declaration_name)) {
1292                      print STDERR "${file}:$.: warning: Excess enum value '$k' description in '$declaration_name'\n";
1293                 }
1294             }
1295         }
1296
1297         output_declaration($declaration_name,
1298                            'enum',
1299                            {'enum' => $declaration_name,
1300                             'module' => $modulename,
1301                             'parameterlist' => \@parameterlist,
1302                             'parameterdescs' => \%parameterdescs,
1303                             'sectionlist' => \@sectionlist,
1304                             'sections' => \%sections,
1305                             'purpose' => $declaration_purpose
1306                            });
1307     }
1308     else {
1309         print STDERR "${file}:$.: error: Cannot parse enum!\n";
1310         ++$errors;
1311     }
1312 }
1313
1314 sub dump_typedef($$) {
1315     my $x = shift;
1316     my $file = shift;
1317
1318     $x =~ s@/\*.*?\*/@@gos;     # strip comments.
1319
1320     # Parse function prototypes
1321     if ($x =~ /typedef\s+(\w+)\s*\(\*\s*(\w\S+)\s*\)\s*\((.*)\);/ ||
1322         $x =~ /typedef\s+(\w+)\s*(\w\S+)\s*\s*\((.*)\);/) {
1323
1324         # Function typedefs
1325         $return_type = $1;
1326         $declaration_name = $2;
1327         my $args = $3;
1328
1329         create_parameterlist($args, ',', $file, $declaration_name);
1330
1331         output_declaration($declaration_name,
1332                            'function',
1333                            {'function' => $declaration_name,
1334                             'typedef' => 1,
1335                             'module' => $modulename,
1336                             'functiontype' => $return_type,
1337                             'parameterlist' => \@parameterlist,
1338                             'parameterdescs' => \%parameterdescs,
1339                             'parametertypes' => \%parametertypes,
1340                             'sectionlist' => \@sectionlist,
1341                             'sections' => \%sections,
1342                             'purpose' => $declaration_purpose
1343                            });
1344         return;
1345     }
1346
1347     while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
1348         $x =~ s/\(*.\)\s*;$/;/;
1349         $x =~ s/\[*.\]\s*;$/;/;
1350     }
1351
1352     if ($x =~ /typedef.*\s+(\w+)\s*;/) {
1353         $declaration_name = $1;
1354
1355         output_declaration($declaration_name,
1356                            'typedef',
1357                            {'typedef' => $declaration_name,
1358                             'module' => $modulename,
1359                             'sectionlist' => \@sectionlist,
1360                             'sections' => \%sections,
1361                             'purpose' => $declaration_purpose
1362                            });
1363     }
1364     else {
1365         print STDERR "${file}:$.: error: Cannot parse typedef!\n";
1366         ++$errors;
1367     }
1368 }
1369
1370 sub save_struct_actual($) {
1371     my $actual = shift;
1372
1373     # strip all spaces from the actual param so that it looks like one string item
1374     $actual =~ s/\s*//g;
1375     $struct_actual = $struct_actual . $actual . " ";
1376 }
1377
1378 sub create_parameterlist($$$$) {
1379     my $args = shift;
1380     my $splitter = shift;
1381     my $file = shift;
1382     my $declaration_name = shift;
1383     my $type;
1384     my $param;
1385
1386     # temporarily replace commas inside function pointer definition
1387     while ($args =~ /(\([^\),]+),/) {
1388         $args =~ s/(\([^\),]+),/$1#/g;
1389     }
1390
1391     foreach my $arg (split($splitter, $args)) {
1392         # strip comments
1393         $arg =~ s/\/\*.*\*\///;
1394         # strip leading/trailing spaces
1395         $arg =~ s/^\s*//;
1396         $arg =~ s/\s*$//;
1397         $arg =~ s/\s+/ /;
1398
1399         if ($arg =~ /^#/) {
1400             # Treat preprocessor directive as a typeless variable just to fill
1401             # corresponding data structures "correctly". Catch it later in
1402             # output_* subs.
1403             push_parameter($arg, "", $file);
1404         } elsif ($arg =~ m/\(.+\)\s*\(/) {
1405             # pointer-to-function
1406             $arg =~ tr/#/,/;
1407             $arg =~ m/[^\(]+\(\*?\s*([\w\.]*)\s*\)/;
1408             $param = $1;
1409             $type = $arg;
1410             $type =~ s/([^\(]+\(\*?)\s*$param/$1/;
1411             save_struct_actual($param);
1412             push_parameter($param, $type, $file, $declaration_name);
1413         } elsif ($arg) {
1414             $arg =~ s/\s*:\s*/:/g;
1415             $arg =~ s/\s*\[/\[/g;
1416
1417             my @args = split('\s*,\s*', $arg);
1418             if ($args[0] =~ m/\*/) {
1419                 $args[0] =~ s/(\*+)\s*/ $1/;
1420             }
1421
1422             my @first_arg;
1423             if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
1424                     shift @args;
1425                     push(@first_arg, split('\s+', $1));
1426                     push(@first_arg, $2);
1427             } else {
1428                     @first_arg = split('\s+', shift @args);
1429             }
1430
1431             unshift(@args, pop @first_arg);
1432             $type = join " ", @first_arg;
1433
1434             foreach $param (@args) {
1435                 if ($param =~ m/^(\*+)\s*(.*)/) {
1436                     save_struct_actual($2);
1437                     push_parameter($2, "$type $1", $file, $declaration_name);
1438                 }
1439                 elsif ($param =~ m/(.*?):(\d+)/) {
1440                     if ($type ne "") { # skip unnamed bit-fields
1441                         save_struct_actual($1);
1442                         push_parameter($1, "$type:$2", $file, $declaration_name)
1443                     }
1444                 }
1445                 else {
1446                     save_struct_actual($param);
1447                     push_parameter($param, $type, $file, $declaration_name);
1448                 }
1449             }
1450         }
1451     }
1452 }
1453
1454 sub push_parameter($$$$) {
1455         my $param = shift;
1456         my $type = shift;
1457         my $file = shift;
1458         my $declaration_name = shift;
1459
1460         if (($anon_struct_union == 1) && ($type eq "") &&
1461             ($param eq "}")) {
1462                 return;         # ignore the ending }; from anon. struct/union
1463         }
1464
1465         $anon_struct_union = 0;
1466         $param =~ s/[\[\)].*//;
1467
1468         if ($type eq "" && $param =~ /\.\.\.$/)
1469         {
1470             if (!$param =~ /\w\.\.\.$/) {
1471               # handles unnamed variable parameters
1472               $param = "...";
1473             }
1474             if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
1475                 $parameterdescs{$param} = "variable arguments";
1476             }
1477         }
1478         elsif ($type eq "" && ($param eq "" or $param eq "void"))
1479         {
1480             $param="void";
1481             $parameterdescs{void} = "no arguments";
1482         }
1483         elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
1484         # handle unnamed (anonymous) union or struct:
1485         {
1486                 $type = $param;
1487                 $param = "{unnamed_" . $param . "}";
1488                 $parameterdescs{$param} = "anonymous\n";
1489                 $anon_struct_union = 1;
1490         }
1491
1492         # warn if parameter has no description
1493         # (but ignore ones starting with # as these are not parameters
1494         # but inline preprocessor statements);
1495         # Note: It will also ignore void params and unnamed structs/unions
1496         if (!defined $parameterdescs{$param} && $param !~ /^#/) {
1497                 $parameterdescs{$param} = $undescribed;
1498
1499                 if (show_warnings($type, $declaration_name) && $param !~ /\./) {
1500                         print STDERR
1501                               "${file}:$.: warning: Function parameter or member '$param' not described in '$declaration_name'\n";
1502                         ++$warnings;
1503                 }
1504         }
1505
1506         # strip spaces from $param so that it is one continuous string
1507         # on @parameterlist;
1508         # this fixes a problem where check_sections() cannot find
1509         # a parameter like "addr[6 + 2]" because it actually appears
1510         # as "addr[6", "+", "2]" on the parameter list;
1511         # but it's better to maintain the param string unchanged for output,
1512         # so just weaken the string compare in check_sections() to ignore
1513         # "[blah" in a parameter string;
1514         ###$param =~ s/\s*//g;
1515         push @parameterlist, $param;
1516         $type =~ s/\s\s+/ /g;
1517         $parametertypes{$param} = $type;
1518 }
1519
1520 sub check_sections($$$$$) {
1521         my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck) = @_;
1522         my @sects = split ' ', $sectcheck;
1523         my @prms = split ' ', $prmscheck;
1524         my $err;
1525         my ($px, $sx);
1526         my $prm_clean;          # strip trailing "[array size]" and/or beginning "*"
1527
1528         foreach $sx (0 .. $#sects) {
1529                 $err = 1;
1530                 foreach $px (0 .. $#prms) {
1531                         $prm_clean = $prms[$px];
1532                         $prm_clean =~ s/\[.*\]//;
1533                         $prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
1534                         # ignore array size in a parameter string;
1535                         # however, the original param string may contain
1536                         # spaces, e.g.:  addr[6 + 2]
1537                         # and this appears in @prms as "addr[6" since the
1538                         # parameter list is split at spaces;
1539                         # hence just ignore "[..." for the sections check;
1540                         $prm_clean =~ s/\[.*//;
1541
1542                         ##$prm_clean =~ s/^\**//;
1543                         if ($prm_clean eq $sects[$sx]) {
1544                                 $err = 0;
1545                                 last;
1546                         }
1547                 }
1548                 if ($err) {
1549                         if ($decl_type eq "function") {
1550                                 print STDERR "${file}:$.: warning: " .
1551                                         "Excess function parameter " .
1552                                         "'$sects[$sx]' " .
1553                                         "description in '$decl_name'\n";
1554                                 ++$warnings;
1555                         }
1556                 }
1557         }
1558 }
1559
1560 ##
1561 # Checks the section describing the return value of a function.
1562 sub check_return_section {
1563         my $file = shift;
1564         my $declaration_name = shift;
1565         my $return_type = shift;
1566
1567         # Ignore an empty return type (It's a macro)
1568         # Ignore functions with a "void" return type. (But don't ignore "void *")
1569         if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
1570                 return;
1571         }
1572
1573         if (!defined($sections{$section_return}) ||
1574             $sections{$section_return} eq "") {
1575                 print STDERR "${file}:$.: warning: " .
1576                         "No description found for return value of " .
1577                         "'$declaration_name'\n";
1578                 ++$warnings;
1579         }
1580 }
1581
1582 ##
1583 # takes a function prototype and the name of the current file being
1584 # processed and spits out all the details stored in the global
1585 # arrays/hashes.
1586 sub dump_function($$) {
1587     my $prototype = shift;
1588     my $file = shift;
1589     my $noret = 0;
1590
1591     $prototype =~ s/^static +//;
1592     $prototype =~ s/^extern +//;
1593     $prototype =~ s/^asmlinkage +//;
1594     $prototype =~ s/^inline +//;
1595     $prototype =~ s/^__inline__ +//;
1596     $prototype =~ s/^__inline +//;
1597     $prototype =~ s/^__always_inline +//;
1598     $prototype =~ s/^noinline +//;
1599     $prototype =~ s/__init +//;
1600     $prototype =~ s/__init_or_module +//;
1601     $prototype =~ s/__meminit +//;
1602     $prototype =~ s/__must_check +//;
1603     $prototype =~ s/__weak +//;
1604     $prototype =~ s/__sched +//;
1605     $prototype =~ s/__printf\s*\(\s*\d*\s*,\s*\d*\s*\) +//;
1606     my $define = $prototype =~ s/^#\s*define\s+//; #ak added
1607     $prototype =~ s/__attribute__\s*\(\(
1608             (?:
1609                  [\w\s]++          # attribute name
1610                  (?:\([^)]*+\))?   # attribute arguments
1611                  \s*+,?            # optional comma at the end
1612             )+
1613           \)\)\s+//x;
1614
1615     # Yes, this truly is vile.  We are looking for:
1616     # 1. Return type (may be nothing if we're looking at a macro)
1617     # 2. Function name
1618     # 3. Function parameters.
1619     #
1620     # All the while we have to watch out for function pointer parameters
1621     # (which IIRC is what the two sections are for), C types (these
1622     # regexps don't even start to express all the possibilities), and
1623     # so on.
1624     #
1625     # If you mess with these regexps, it's a good idea to check that
1626     # the following functions' documentation still comes out right:
1627     # - parport_register_device (function pointer parameters)
1628     # - atomic_set (macro)
1629     # - pci_match_device, __copy_to_user (long return type)
1630
1631     if ($define && $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s+/) {
1632         # This is an object-like macro, it has no return type and no parameter
1633         # list.
1634         # Function-like macros are not allowed to have spaces between
1635         # declaration_name and opening parenthesis (notice the \s+).
1636         $return_type = $1;
1637         $declaration_name = $2;
1638         $noret = 1;
1639     } elsif ($prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1640         $prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1641         $prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1642         $prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1643         $prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1644         $prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1645         $prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
1646         $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1647         $prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1648         $prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1649         $prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1650         $prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1651         $prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1652         $prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1653         $prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1654         $prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
1655         $prototype =~ m/^(\w+\s+\w+\s*\*+\s*\w+\s*\*+\s*)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/)  {
1656         $return_type = $1;
1657         $declaration_name = $2;
1658         my $args = $3;
1659
1660         create_parameterlist($args, ',', $file, $declaration_name);
1661     } else {
1662         print STDERR "${file}:$.: warning: cannot understand function prototype: '$prototype'\n";
1663         return;
1664     }
1665
1666         my $prms = join " ", @parameterlist;
1667         check_sections($file, $declaration_name, "function", $sectcheck, $prms);
1668
1669         # This check emits a lot of warnings at the moment, because many
1670         # functions don't have a 'Return' doc section. So until the number
1671         # of warnings goes sufficiently down, the check is only performed in
1672         # verbose mode.
1673         # TODO: always perform the check.
1674         if ($verbose && !$noret) {
1675                 check_return_section($file, $declaration_name, $return_type);
1676         }
1677
1678     output_declaration($declaration_name,
1679                        'function',
1680                        {'function' => $declaration_name,
1681                         'module' => $modulename,
1682                         'functiontype' => $return_type,
1683                         'parameterlist' => \@parameterlist,
1684                         'parameterdescs' => \%parameterdescs,
1685                         'parametertypes' => \%parametertypes,
1686                         'sectionlist' => \@sectionlist,
1687                         'sections' => \%sections,
1688                         'purpose' => $declaration_purpose
1689                        });
1690 }
1691
1692 sub reset_state {
1693     $function = "";
1694     %parameterdescs = ();
1695     %parametertypes = ();
1696     @parameterlist = ();
1697     %sections = ();
1698     @sectionlist = ();
1699     $sectcheck = "";
1700     $struct_actual = "";
1701     $prototype = "";
1702
1703     $state = STATE_NORMAL;
1704     $inline_doc_state = STATE_INLINE_NA;
1705 }
1706
1707 sub tracepoint_munge($) {
1708         my $file = shift;
1709         my $tracepointname = 0;
1710         my $tracepointargs = 0;
1711
1712         if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
1713                 $tracepointname = $1;
1714         }
1715         if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
1716                 $tracepointname = $1;
1717         }
1718         if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
1719                 $tracepointname = $2;
1720         }
1721         $tracepointname =~ s/^\s+//; #strip leading whitespace
1722         if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
1723                 $tracepointargs = $1;
1724         }
1725         if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
1726                 print STDERR "${file}:$.: warning: Unrecognized tracepoint format: \n".
1727                              "$prototype\n";
1728         } else {
1729                 $prototype = "static inline void trace_$tracepointname($tracepointargs)";
1730         }
1731 }
1732
1733 sub syscall_munge() {
1734         my $void = 0;
1735
1736         $prototype =~ s@[\r\n]+@ @gos; # strip newlines/CR's
1737 ##      if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
1738         if ($prototype =~ m/SYSCALL_DEFINE0/) {
1739                 $void = 1;
1740 ##              $prototype = "long sys_$1(void)";
1741         }
1742
1743         $prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
1744         if ($prototype =~ m/long (sys_.*?),/) {
1745                 $prototype =~ s/,/\(/;
1746         } elsif ($void) {
1747                 $prototype =~ s/\)/\(void\)/;
1748         }
1749
1750         # now delete all of the odd-number commas in $prototype
1751         # so that arg types & arg names don't have a comma between them
1752         my $count = 0;
1753         my $len = length($prototype);
1754         if ($void) {
1755                 $len = 0;       # skip the for-loop
1756         }
1757         for (my $ix = 0; $ix < $len; $ix++) {
1758                 if (substr($prototype, $ix, 1) eq ',') {
1759                         $count++;
1760                         if ($count % 2 == 1) {
1761                                 substr($prototype, $ix, 1) = ' ';
1762                         }
1763                 }
1764         }
1765 }
1766
1767 sub process_proto_function($$) {
1768     my $x = shift;
1769     my $file = shift;
1770
1771     $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1772
1773     if ($x =~ m#\s*/\*\s+MACDOC\s*#io || ($x =~ /^#/ && $x !~ /^#\s*define/)) {
1774         # do nothing
1775     }
1776     elsif ($x =~ /([^\{]*)/) {
1777         $prototype .= $1;
1778     }
1779
1780     if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
1781         $prototype =~ s@/\*.*?\*/@@gos; # strip comments.
1782         $prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1783         $prototype =~ s@^\s+@@gos; # strip leading spaces
1784         if ($prototype =~ /SYSCALL_DEFINE/) {
1785                 syscall_munge();
1786         }
1787         if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
1788             $prototype =~ /DEFINE_SINGLE_EVENT/)
1789         {
1790                 tracepoint_munge($file);
1791         }
1792         dump_function($prototype, $file);
1793         reset_state();
1794     }
1795 }
1796
1797 sub process_proto_type($$) {
1798     my $x = shift;
1799     my $file = shift;
1800
1801     $x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
1802     $x =~ s@^\s+@@gos; # strip leading spaces
1803     $x =~ s@\s+$@@gos; # strip trailing spaces
1804     $x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
1805
1806     if ($x =~ /^#/) {
1807         # To distinguish preprocessor directive from regular declaration later.
1808         $x .= ";";
1809     }
1810
1811     while (1) {
1812         if ( $x =~ /([^\{\};]*)([\{\};])(.*)/ ) {
1813             if( length $prototype ) {
1814                 $prototype .= " "
1815             }
1816             $prototype .= $1 . $2;
1817             ($2 eq '{') && $brcount++;
1818             ($2 eq '}') && $brcount--;
1819             if (($2 eq ';') && ($brcount == 0)) {
1820                 dump_declaration($prototype, $file);
1821                 reset_state();
1822                 last;
1823             }
1824             $x = $3;
1825         } else {
1826             $prototype .= $x;
1827             last;
1828         }
1829     }
1830 }
1831
1832
1833 sub map_filename($) {
1834     my $file;
1835     my ($orig_file) = @_;
1836
1837     if (defined($ENV{'SRCTREE'})) {
1838         $file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
1839     } else {
1840         $file = $orig_file;
1841     }
1842
1843     if (defined($source_map{$file})) {
1844         $file = $source_map{$file};
1845     }
1846
1847     return $file;
1848 }
1849
1850 sub process_export_file($) {
1851     my ($orig_file) = @_;
1852     my $file = map_filename($orig_file);
1853
1854     if (!open(IN,"<$file")) {
1855         print STDERR "Error: Cannot open file $file\n";
1856         ++$errors;
1857         return;
1858     }
1859
1860     while (<IN>) {
1861         if (/$export_symbol/) {
1862             $function_table{$2} = 1;
1863         }
1864     }
1865
1866     close(IN);
1867 }
1868
1869 #
1870 # Parsers for the various processing states.
1871 #
1872 # STATE_NORMAL: looking for the /** to begin everything.
1873 #
1874 sub process_normal() {
1875     if (/$doc_start/o) {
1876         $state = STATE_NAME;    # next line is always the function name
1877         $in_doc_sect = 0;
1878         $declaration_start_line = $. + 1;
1879     }
1880 }
1881
1882 #
1883 # STATE_NAME: Looking for the "name - description" line
1884 #
1885 sub process_name($$) {
1886     my $file = shift;
1887     my $identifier;
1888     my $descr;
1889
1890     if (/$doc_block/o) {
1891         $state = STATE_DOCBLOCK;
1892         $contents = "";
1893         $new_start_line = $. + 1;
1894
1895         if ( $1 eq "" ) {
1896             $section = $section_intro;
1897         } else {
1898             $section = $1;
1899         }
1900     }
1901     elsif (/$doc_decl/o) {
1902         $identifier = $1;
1903         if (/\s*([\w\s]+?)(\s*-|:)/) {
1904             $identifier = $1;
1905         }
1906
1907         $state = STATE_BODY;
1908         # if there's no @param blocks need to set up default section
1909         # here
1910         $contents = "";
1911         $section = $section_default;
1912         $new_start_line = $. + 1;
1913         if (/[-:](.*)/) {
1914             # strip leading/trailing/multiple spaces
1915             $descr= $1;
1916             $descr =~ s/^\s*//;
1917             $descr =~ s/\s*$//;
1918             $descr =~ s/\s+/ /g;
1919             $declaration_purpose = $descr;
1920             $state = STATE_BODY_MAYBE;
1921         } else {
1922             $declaration_purpose = "";
1923         }
1924
1925         if (($declaration_purpose eq "") && $verbose) {
1926             print STDERR "${file}:$.: warning: missing initial short description on line:\n";
1927             print STDERR $_;
1928             ++$warnings;
1929         }
1930
1931         if ($identifier =~ m/^[A-Z]/) {
1932             $decl_type = 'type name';
1933         } elsif ($identifier =~ m/^struct\b/) {
1934             $decl_type = 'struct';
1935         } elsif ($identifier =~ m/^union\b/) {
1936             $decl_type = 'union';
1937         } elsif ($identifier =~ m/^enum\b/) {
1938             $decl_type = 'enum';
1939         } elsif ($identifier =~ m/^typedef\b/) {
1940             $decl_type = 'typedef';
1941         } else {
1942             $decl_type = 'function';
1943         }
1944
1945         if ($verbose) {
1946             print STDERR "${file}:$.: info: Scanning doc for $identifier\n";
1947         }
1948     } else {
1949         print STDERR "${file}:$.: warning: Cannot understand $_ on line $.",
1950             " - I thought it was a doc line\n";
1951         ++$warnings;
1952         $state = STATE_NORMAL;
1953     }
1954 }
1955
1956
1957 #
1958 # STATE_BODY and STATE_BODY_MAYBE: the bulk of a kerneldoc comment.
1959 #
1960 sub process_body($$) {
1961     my $file = shift;
1962
1963     if (/$doc_sect/i) { # case insensitive for supported section names
1964         $newsection = $1;
1965         $newcontents = $2;
1966
1967         # map the supported section names to the canonical names
1968         if ($newsection =~ m/^description$/i) {
1969             $newsection = $section_default;
1970         } elsif ($newsection =~ m/^context$/i) {
1971             $newsection = $section_context;
1972         } elsif ($newsection =~ m/^returns?$/i) {
1973             $newsection = $section_return;
1974         } elsif ($newsection =~ m/^\@return$/) {
1975             # special: @return is a section, not a param description
1976             $newsection = $section_return;
1977         }
1978
1979         if (($contents ne "") && ($contents ne "\n")) {
1980             if (!$in_doc_sect && $verbose) {
1981                 print STDERR "${file}:$.: warning: contents before sections\n";
1982                 ++$warnings;
1983             }
1984             dump_section($file, $section, $contents);
1985             $section = $section_default;
1986         }
1987
1988         $in_doc_sect = 1;
1989         $state = STATE_BODY;
1990         $contents = $newcontents;
1991         $new_start_line = $.;
1992         while (substr($contents, 0, 1) eq " ") {
1993             $contents = substr($contents, 1);
1994         }
1995         if ($contents ne "") {
1996             $contents .= "\n";
1997         }
1998         $section = $newsection;
1999         $leading_space = undef;
2000     } elsif (/$doc_end/) {
2001         if (($contents ne "") && ($contents ne "\n")) {
2002             dump_section($file, $section, $contents);
2003             $section = $section_default;
2004             $contents = "";
2005         }
2006         # look for doc_com + <text> + doc_end:
2007         if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
2008             print STDERR "${file}:$.: warning: suspicious ending line: $_";
2009             ++$warnings;
2010         }
2011
2012         $prototype = "";
2013         $state = STATE_PROTO;
2014         $brcount = 0;
2015     } elsif (/$doc_content/) {
2016         # miguel-style comment kludge, look for blank lines after
2017         # @parameter line to signify start of description
2018         if ($1 eq "") {
2019             if ($section =~ m/^@/ || $section eq $section_context) {
2020                 dump_section($file, $section, $contents);
2021                 $section = $section_default;
2022                 $contents = "";
2023                 $new_start_line = $.;
2024             } else {
2025                 $contents .= "\n";
2026             }
2027             $state = STATE_BODY;
2028         } elsif ($state == STATE_BODY_MAYBE) {
2029             # Continued declaration purpose
2030             chomp($declaration_purpose);
2031             $declaration_purpose .= " " . $1;
2032             $declaration_purpose =~ s/\s+/ /g;
2033         } else {
2034             my $cont = $1;
2035             if ($section =~ m/^@/ || $section eq $section_context) {
2036                 if (!defined $leading_space) {
2037                     if ($cont =~ m/^(\s+)/) {
2038                         $leading_space = $1;
2039                     } else {
2040                         $leading_space = "";
2041                     }
2042                 }
2043                 $cont =~ s/^$leading_space//;
2044             }
2045             $contents .= $cont . "\n";
2046         }
2047     } else {
2048         # i dont know - bad line?  ignore.
2049         print STDERR "${file}:$.: warning: bad line: $_";
2050         ++$warnings;
2051     }
2052 }
2053
2054
2055 #
2056 # STATE_PROTO: reading a function/whatever prototype.
2057 #
2058 sub process_proto($$) {
2059     my $file = shift;
2060
2061     if (/$doc_inline_oneline/) {
2062         $section = $1;
2063         $contents = $2;
2064         if ($contents ne "") {
2065             $contents .= "\n";
2066             dump_section($file, $section, $contents);
2067             $section = $section_default;
2068             $contents = "";
2069         }
2070     } elsif (/$doc_inline_start/) {
2071         $state = STATE_INLINE;
2072         $inline_doc_state = STATE_INLINE_NAME;
2073     } elsif ($decl_type eq 'function') {
2074         process_proto_function($_, $file);
2075     } else {
2076         process_proto_type($_, $file);
2077     }
2078 }
2079
2080 #
2081 # STATE_DOCBLOCK: within a DOC: block.
2082 #
2083 sub process_docblock($$) {
2084     my $file = shift;
2085
2086     if (/$doc_end/) {
2087         dump_doc_section($file, $section, $contents);
2088         $section = $section_default;
2089         $contents = "";
2090         $function = "";
2091         %parameterdescs = ();
2092         %parametertypes = ();
2093         @parameterlist = ();
2094         %sections = ();
2095         @sectionlist = ();
2096         $prototype = "";
2097         $state = STATE_NORMAL;
2098     } elsif (/$doc_content/) {
2099         if ( $1 eq "" ) {
2100             $contents .= $blankline;
2101         } else {
2102             $contents .= $1 . "\n";
2103         }
2104     }
2105 }
2106
2107 #
2108 # STATE_INLINE: docbook comments within a prototype.
2109 #
2110 sub process_inline($$) {
2111     my $file = shift;
2112
2113     # First line (state 1) needs to be a @parameter
2114     if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
2115         $section = $1;
2116         $contents = $2;
2117         $new_start_line = $.;
2118         if ($contents ne "") {
2119             while (substr($contents, 0, 1) eq " ") {
2120                 $contents = substr($contents, 1);
2121             }
2122             $contents .= "\n";
2123         }
2124         $inline_doc_state = STATE_INLINE_TEXT;
2125         # Documentation block end */
2126     } elsif (/$doc_inline_end/) {
2127         if (($contents ne "") && ($contents ne "\n")) {
2128             dump_section($file, $section, $contents);
2129             $section = $section_default;
2130             $contents = "";
2131         }
2132         $state = STATE_PROTO;
2133         $inline_doc_state = STATE_INLINE_NA;
2134         # Regular text
2135     } elsif (/$doc_content/) {
2136         if ($inline_doc_state == STATE_INLINE_TEXT) {
2137             $contents .= $1 . "\n";
2138             # nuke leading blank lines
2139             if ($contents =~ /^\s*$/) {
2140                 $contents = "";
2141             }
2142         } elsif ($inline_doc_state == STATE_INLINE_NAME) {
2143             $inline_doc_state = STATE_INLINE_ERROR;
2144             print STDERR "${file}:$.: warning: ";
2145             print STDERR "Incorrect use of kernel-doc format: $_";
2146             ++$warnings;
2147         }
2148     }
2149 }
2150
2151
2152 sub process_file($) {
2153     my $file;
2154     my $initial_section_counter = $section_counter;
2155     my ($orig_file) = @_;
2156
2157     $file = map_filename($orig_file);
2158
2159     if (!open(IN,"<$file")) {
2160         print STDERR "Error: Cannot open file $file\n";
2161         ++$errors;
2162         return;
2163     }
2164
2165     $. = 1;
2166
2167     $section_counter = 0;
2168     while (<IN>) {
2169         while (s/\\\s*$//) {
2170             $_ .= <IN>;
2171         }
2172         # Replace tabs by spaces
2173         while ($_ =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {};
2174         # Hand this line to the appropriate state handler
2175         if ($state == STATE_NORMAL) {
2176             process_normal();
2177         } elsif ($state == STATE_NAME) {
2178             process_name($file, $_);
2179         } elsif ($state == STATE_BODY || $state == STATE_BODY_MAYBE) {
2180             process_body($file, $_);
2181         } elsif ($state == STATE_INLINE) { # scanning for inline parameters
2182             process_inline($file, $_);
2183         } elsif ($state == STATE_PROTO) {
2184             process_proto($file, $_);
2185         } elsif ($state == STATE_DOCBLOCK) {
2186             process_docblock($file, $_);
2187         }
2188     }
2189
2190     # Make sure we got something interesting.
2191     if ($initial_section_counter == $section_counter && $
2192         output_mode ne "none") {
2193         if ($output_selection == OUTPUT_INCLUDE) {
2194             print STDERR "${file}:1: warning: '$_' not found\n"
2195                 for keys %function_table;
2196         }
2197         else {
2198             print STDERR "${file}:1: warning: no structured comments found\n";
2199         }
2200     }
2201 }
2202
2203
2204 $kernelversion = get_kernel_version();
2205
2206 # generate a sequence of code that will splice in highlighting information
2207 # using the s// operator.
2208 for (my $k = 0; $k < @highlights; $k++) {
2209     my $pattern = $highlights[$k][0];
2210     my $result = $highlights[$k][1];
2211 #   print STDERR "scanning pattern:$pattern, highlight:($result)\n";
2212     $dohighlight .=  "\$contents =~ s:$pattern:$result:gs;\n";
2213 }
2214
2215 # Read the file that maps relative names to absolute names for
2216 # separate source and object directories and for shadow trees.
2217 if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
2218         my ($relname, $absname);
2219         while(<SOURCE_MAP>) {
2220                 chop();
2221                 ($relname, $absname) = (split())[0..1];
2222                 $relname =~ s:^/+::;
2223                 $source_map{$relname} = $absname;
2224         }
2225         close(SOURCE_MAP);
2226 }
2227
2228 if ($output_selection == OUTPUT_EXPORTED ||
2229     $output_selection == OUTPUT_INTERNAL) {
2230
2231     push(@export_file_list, @ARGV);
2232
2233     foreach (@export_file_list) {
2234         chomp;
2235         process_export_file($_);
2236     }
2237 }
2238
2239 foreach (@ARGV) {
2240     chomp;
2241     process_file($_);
2242 }
2243 if ($verbose && $errors) {
2244   print STDERR "$errors errors\n";
2245 }
2246 if ($verbose && $warnings) {
2247   print STDERR "$warnings warnings\n";
2248 }
2249
2250 exit($output_mode eq "none" ? 0 : $errors);