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