kernel-doc

#!/usr/bin/perl -w

use strict;

## Copyright (c) 1998 Michael Zucchi, All Rights Reserved        ##
## Copyright (C) 2000, 1  Tim Waugh <twaugh@redhat.com>          ##
## Copyright (C) 2001  Simon Huggins                             ##
## Copyright (C) 2005-2012  Randy Dunlap                         ##
## Copyright (C) 2012  Dan Luedtke                               ##
## 								 ##
## #define enhancements by Armin Kuster <akuster@mvista.com>	 ##
## Copyright (c) 2000 MontaVista Software, Inc.			 ##
## 								 ##
## This software falls under the GNU General Public License.     ##
## Please read the COPYING file for more information             ##

# 18/01/2001 - 	Cleanups
# 		Functions prototyped as foo(void) same as foo()
# 		Stop eval'ing where we don't need to.
# -- huggie@earth.li

# 27/06/2001 -  Allowed whitespace after initial "/**" and
#               allowed comments before function declarations.
# -- Christian Kreibich <ck@whoop.org>

# Still to do:
# 	- add perldoc documentation
# 	- Look more closely at some of the scarier bits :)

# 26/05/2001 - 	Support for separate source and object trees.
#		Return error code.
# 		Keith Owens <kaos@ocs.com.au>

# 23/09/2001 - Added support for typedefs, structs, enums and unions
#              Support for Context section; can be terminated using empty line
#              Small fixes (like spaces vs. \s in regex)
# -- Tim Jansen <tim@tjansen.de>

# 25/07/2012 - Added support for HTML5
# -- Dan Luedtke <mail@danrl.de>

sub usage {
    my $message = <<"EOF";
Usage: $0 [OPTION ...] FILE ...

Read C language source or header FILEs, extract embedded documentation comments,
and print formatted documentation to standard output.

The documentation comments are identified by "/**" opening comment mark. See
Documentation/kernel-doc-nano-HOWTO.txt for the documentation comment syntax.

Output format selection (mutually exclusive):
  -docbook		Output DocBook format.
  -html			Output HTML format.
  -html5		Output HTML5 format.
  -list			Output symbol list format. This is for use by docproc.
  -man			Output troff manual page format. This is the default.
  -rst			Output reStructuredText format.
  -text			Output plain text format.

Output selection (mutually exclusive):
  -function NAME	Only output documentation for the given function(s)
			or DOC: section title(s). All other functions and DOC:
			sections are ignored. May be specified multiple times.
  -nofunction NAME	Do NOT output documentation for the given function(s);
			only output documentation for the other functions and
			DOC: sections. May be specified multiple times.

Output selection modifiers:
  -no-doc-sections	Do not output DOC: sections.

Other parameters:
  -v			Verbose output, more warnings and other information.
  -h			Print this help.

EOF
    print $message;
    exit 1;
}

#
# format of comments.
# In the following table, (...)? signifies optional structure.
#                         (...)* signifies 0 or more structure elements
# /**
#  * function_name(:)? (- short description)?
# (* @parameterx: (description of parameter x)?)*
# (* a blank line)?
#  * (Description:)? (Description of function)?
#  * (section header: (section description)? )*
#  (*)?*/
#
# So .. the trivial example would be:
#
# /**
#  * my_function
#  */
#
# If the Description: header tag is omitted, then there must be a blank line
# after the last parameter specification.
# e.g.
# /**
#  * my_function - does my stuff
#  * @my_arg: its mine damnit
#  *
#  * Does my stuff explained.
#  */
#
#  or, could also use:
# /**
#  * my_function - does my stuff
#  * @my_arg: its mine damnit
#  * Description: Does my stuff explained.
#  */
# etc.
#
# Besides functions you can also write documentation for structs, unions,
# enums and typedefs. Instead of the function name you must write the name
# of the declaration;  the struct/union/enum/typedef must always precede
# the name. Nesting of declarations is not supported.
# Use the argument mechanism to document members or constants.
# e.g.
# /**
#  * struct my_struct - short description
#  * @a: first member
#  * @b: second member
#  *
#  * Longer description
#  */
# struct my_struct {
#     int a;
#     int b;
# /* private: */
#     int c;
# };
#
# All descriptions can be multiline, except the short function description.
#
# For really longs structs, you can also describe arguments inside the
# body of the struct.
# eg.
# /**
#  * struct my_struct - short description
#  * @a: first member
#  * @b: second member
#  *
#  * Longer description
#  */
# struct my_struct {
#     int a;
#     int b;
#     /**
#      * @c: This is longer description of C
#      *
#      * You can use paragraphs to describe arguments
#      * using this method.
#      */
#     int c;
# };
#
# This should be use only for struct/enum members.
#
# You can also add additional sections. When documenting kernel functions you
# should document the "Context:" of the function, e.g. whether the functions
# can be called form interrupts. Unlike other sections you can end it with an
# empty line.
# A non-void function should have a "Return:" section describing the return
# value(s).
# Example-sections should contain the string EXAMPLE so that they are marked
# appropriately in DocBook.
#
# Example:
# /**
#  * user_function - function that can only be called in user context
#  * @a: some argument
#  * Context: !in_interrupt()
#  *
#  * Some description
#  * Example:
#  *    user_function(22);
#  */
# ...
#
#
# All descriptive text is further processed, scanning for the following special
# patterns, which are highlighted appropriately.
#
# 'funcname()' - function
# '$ENVVAR' - environmental variable
# '&struct_name' - name of a structure (up to two words including 'struct')
# '@parameter' - name of a parameter
# '%CONST' - name of a constant.

## init lots of data

my $errors = 0;
my $warnings = 0;
my $anon_struct_union = 0;

# match expressions used to find embedded type information
my $type_constant = '\%([-_\w]+)';
my $type_func = '(\w+)\(\)';
my $type_param = '\@(\w+)';
my $type_struct = '\&((struct\s*)*[_\w]+)';
my $type_struct_xml = '\\&amp;((struct\s*)*[_\w]+)';
my $type_env = '(\$\w+)';
my $type_enum_full = '\&(enum)\s*([_\w]+)';
my $type_struct_full = '\&(struct)\s*([_\w]+)';

# Output conversion substitutions.
#  One for each output format

# these work fairly well
my @highlights_html = (
                       [$type_constant, "<i>\$1</i>"],
                       [$type_func, "<b>\$1</b>"],
                       [$type_struct_xml, "<i>\$1</i>"],
                       [$type_env, "<b><i>\$1</i></b>"],
                       [$type_param, "<tt><b>\$1</b></tt>"]
                      );
my $local_lt = "\\\\\\\\lt:";
my $local_gt = "\\\\\\\\gt:";
my $blankline_html = $local_lt . "p" . $local_gt;	# was "<p>"

# html version 5
my @highlights_html5 = (
                        [$type_constant, "<span class=\"const\">\$1</span>"],
                        [$type_func, "<span class=\"func\">\$1</span>"],
                        [$type_struct_xml, "<span class=\"struct\">\$1</span>"],
                        [$type_env, "<span class=\"env\">\$1</span>"],
                        [$type_param, "<span class=\"param\">\$1</span>]"]
		       );
my $blankline_html5 = $local_lt . "br /" . $local_gt;

# XML, docbook format
my @highlights_xml = (
                      ["([^=])\\\"([^\\\"<]+)\\\"", "\$1<quote>\$2</quote>"],
                      [$type_constant, "<constant>\$1</constant>"],
                      [$type_struct_xml, "<structname>\$1</structname>"],
                      [$type_param, "<parameter>\$1</parameter>"],
                      [$type_func, "<function>\$1</function>"],
                      [$type_env, "<envar>\$1</envar>"]
		     );
my $blankline_xml = $local_lt . "/para" . $local_gt . $local_lt . "para" . $local_gt . "\n";

# gnome, docbook format
my @highlights_gnome = (
                        [$type_constant, "<replaceable class=\"option\">\$1</replaceable>"],
                        [$type_func, "<function>\$1</function>"],
                        [$type_struct, "<structname>\$1</structname>"],
                        [$type_env, "<envar>\$1</envar>"],
                        [$type_param, "<parameter>\$1</parameter>" ]
		       );
my $blankline_gnome = "</para><para>\n";

# these are pretty rough
my @highlights_man = (
                      [$type_constant, "\$1"],
                      [$type_func, "\\\\fB\$1\\\\fP"],
                      [$type_struct, "\\\\fI\$1\\\\fP"],
                      [$type_param, "\\\\fI\$1\\\\fP"]
		     );
my $blankline_man = "";

# text-mode
my @highlights_text = (
                       [$type_constant, "\$1"],
                       [$type_func, "\$1"],
                       [$type_struct, "\$1"],
                       [$type_param, "\$1"]
		      );
my $blankline_text = "";

# rst-mode
my @highlights_rst = (
                       [$type_constant, "``\$1``"],
                       [$type_func, "\\:c\\:func\\:`\$1`"],
                       [$type_struct_full, "\\:c\\:type\\:`\$1 \$2 <\$2>`"],
                       [$type_enum_full, "\\:c\\:type\\:`\$1 \$2 <\$2>`"],
                       [$type_struct, "\\:c\\:type\\:`struct \$1 <\$1>`"],
                       [$type_param, "**\$1**"]
		      );
my $blankline_rst = "\n";

# list mode
my @highlights_list = (
                       [$type_constant, "\$1"],
                       [$type_func, "\$1"],
                       [$type_struct, "\$1"],
                       [$type_param, "\$1"]
		      );
my $blankline_list = "";

# read arguments
if ($#ARGV == -1) {
    usage();
}

my $kernelversion;
my $dohighlight = "";

my $verbose = 0;
my $output_mode = "man";
my $output_preformatted = 0;
my $no_doc_sections = 0;
my @highlights = @highlights_man;
my $blankline = $blankline_man;
my $modulename = "Kernel API";
my $function_only = 0;
my $show_not_found = 0;

my @build_time;
if (defined($ENV{'KBUILD_BUILD_TIMESTAMP'}) &&
    (my $seconds = `date -d"${ENV{'KBUILD_BUILD_TIMESTAMP'}}" +%s`) ne '') {
    @build_time = gmtime($seconds);
} else {
    @build_time = localtime;
}

my $man_date = ('January', 'February', 'March', 'April', 'May', 'June',
		'July', 'August', 'September', 'October',
		'November', 'December')[$build_time[4]] .
  " " . ($build_time[5]+1900);

# Essentially these are globals.
# They probably want to be tidied up, made more localised or something.
# CAVEAT EMPTOR!  Some of the others I localised may not want to be, which
# could cause "use of undefined value" or other bugs.
my ($function, %function_table, %parametertypes, $declaration_purpose);
my ($type, $declaration_name, $return_type);
my ($newsection, $newcontents, $prototype, $brcount, %source_map);

if (defined($ENV{'KBUILD_VERBOSE'})) {
	$verbose = "$ENV{'KBUILD_VERBOSE'}";
}

# Generated docbook code is inserted in a template at a point where
# docbook v3.1 requires a non-zero sequence of RefEntry's; see:
# http://www.oasis-open.org/docbook/documentation/reference/html/refentry.html
# We keep track of number of generated entries and generate a dummy
# if needs be to ensure the expanded template can be postprocessed
# into html.
my $section_counter = 0;

my $lineprefix="";

# states
# 0 - normal code
# 1 - looking for function name
# 2 - scanning field start.
# 3 - scanning prototype.
# 4 - documentation block
# 5 - gathering documentation outside main block
my $state;
my $in_doc_sect;

# Split Doc State
# 0 - Invalid (Before start or after finish)
# 1 - Is started (the /** was found inside a struct)
# 2 - The @parameter header was found, start accepting multi paragraph text.
# 3 - Finished (the */ was found)
# 4 - Error - Comment without header was found. Spit a warning as it's not
#     proper kernel-doc and ignore the rest.
my $split_doc_state;

#declaration types: can be
# 'function', 'struct', 'union', 'enum', 'typedef'
my $decl_type;

my $doc_special = "\@\%\$\&";

my $doc_start = '^/\*\*\s*$'; # Allow whitespace at end of comment start.
my $doc_end = '\*/';
my $doc_com = '\s*\*\s*';
my $doc_com_body = '\s*\* ?';
my $doc_decl = $doc_com . '(\w+)';
my $doc_sect = $doc_com . '([' . $doc_special . ']?[\w\s]+):(.*)';
my $doc_content = $doc_com_body . '(.*)';
my $doc_block = $doc_com . 'DOC:\s*(.*)?';
my $doc_split_start = '^\s*/\*\*\s*$';
my $doc_split_sect = '\s*\*\s*(@[\w\s]+):(.*)';
my $doc_split_end = '^\s*\*/\s*$';

my %constants;
my %parameterdescs;
my @parameterlist;
my %sections;
my @sectionlist;
my $sectcheck;
my $struct_actual;

my $contents = "";
my $section_default = "Description";	# default section
my $section_intro = "Introduction";
my $section = $section_default;
my $section_context = "Context";
my $section_return = "Return";

my $undescribed = "-- undescribed --";

reset_state();

while ($ARGV[0] =~ m/^-(.*)/) {
    my $cmd = shift @ARGV;
    if ($cmd eq "-html") {
	$output_mode = "html";
	@highlights = @highlights_html;
	$blankline = $blankline_html;
    } elsif ($cmd eq "-html5") {
	$output_mode = "html5";
	@highlights = @highlights_html5;
	$blankline = $blankline_html5;
    } elsif ($cmd eq "-man") {
	$output_mode = "man";
	@highlights = @highlights_man;
	$blankline = $blankline_man;
    } elsif ($cmd eq "-text") {
	$output_mode = "text";
	@highlights = @highlights_text;
	$blankline = $blankline_text;
    } elsif ($cmd eq "-rst") {
	$output_mode = "rst";
	@highlights = @highlights_rst;
	$blankline = $blankline_rst;
    } elsif ($cmd eq "-docbook") {
	$output_mode = "xml";
	@highlights = @highlights_xml;
	$blankline = $blankline_xml;
    } elsif ($cmd eq "-list") {
	$output_mode = "list";
	@highlights = @highlights_list;
	$blankline = $blankline_list;
    } elsif ($cmd eq "-gnome") {
	$output_mode = "gnome";
	@highlights = @highlights_gnome;
	$blankline = $blankline_gnome;
    } elsif ($cmd eq "-module") { # not needed for XML, inherits from calling document
	$modulename = shift @ARGV;
    } elsif ($cmd eq "-function") { # to only output specific functions
	$function_only = 1;
	$function = shift @ARGV;
	$function_table{$function} = 1;
    } elsif ($cmd eq "-nofunction") { # to only output specific functions
	$function_only = 2;
	$function = shift @ARGV;
	$function_table{$function} = 1;
    } elsif ($cmd eq "-v") {
	$verbose = 1;
    } elsif (($cmd eq "-h") || ($cmd eq "--help")) {
	usage();
    } elsif ($cmd eq '-no-doc-sections') {
	    $no_doc_sections = 1;
    } elsif ($cmd eq '-show-not-found') {
	$show_not_found = 1;
    }
}

# continue execution near EOF;

# get kernel version from env
sub get_kernel_version() {
    my $version = 'unknown kernel version';

    if (defined($ENV{'KERNELVERSION'})) {
	$version = $ENV{'KERNELVERSION'};
    }
    return $version;
}

##
# dumps section contents to arrays/hashes intended for that purpose.
#
sub dump_section {
    my $file = shift;
    my $name = shift;
    my $contents = join "\n", @_;

    if ($name =~ m/$type_constant/) {
	$name = $1;
#	print STDERR "constant section '$1' = '$contents'\n";
	$constants{$name} = $contents;
    } elsif ($name =~ m/$type_param/) {
#	print STDERR "parameter def '$1' = '$contents'\n";
	$name = $1;
	$parameterdescs{$name} = $contents;
	$sectcheck = $sectcheck . $name . " ";
    } elsif ($name eq "@\.\.\.") {
#	print STDERR "parameter def '...' = '$contents'\n";
	$name = "...";
	$parameterdescs{$name} = $contents;
	$sectcheck = $sectcheck . $name . " ";
    } else {
#	print STDERR "other section '$name' = '$contents'\n";
	if (defined($sections{$name}) && ($sections{$name} ne "")) {
		print STDERR "${file}:$.: error: duplicate section name '$name'\n";
		++$errors;
	}
	$sections{$name} = $contents;
	push @sectionlist, $name;
    }
}

##
# dump DOC: section after checking that it should go out
#
sub dump_doc_section {
    my $file = shift;
    my $name = shift;
    my $contents = join "\n", @_;

    if ($no_doc_sections) {
        return;
    }

    if (($function_only == 0) ||
	( $function_only == 1 && defined($function_table{$name})) ||
	( $function_only == 2 && !defined($function_table{$name})))
    {
	dump_section($file, $name, $contents);
	output_blockhead({'sectionlist' => \@sectionlist,
			  'sections' => \%sections,
			  'module' => $modulename,
			  'content-only' => ($function_only != 0), });
    }
}

##
# output function
#
# parameterdescs, a hash.
#  function => "function name"
#  parameterlist => @list of parameters
#  parameterdescs => %parameter descriptions
#  sectionlist => @list of sections
#  sections => %section descriptions
#

sub output_highlight {
    my $contents = join "\n",@_;
    my $line;

#   DEBUG
#   if (!defined $contents) {
#	use Carp;
#	confess "output_highlight got called with no args?\n";
#   }

    if ($output_mode eq "html" || $output_mode eq "html5" ||
	$output_mode eq "xml") {
	$contents = local_unescape($contents);
	# convert data read & converted thru xml_escape() into &xyz; format:
	$contents =~ s/\\\\\\/\&/g;
    }
#   print STDERR "contents b4:$contents\n";
    eval $dohighlight;
    die $@ if $@;
#   print STDERR "contents af:$contents\n";

#   strip whitespaces when generating html5
    if ($output_mode eq "html5") {
	$contents =~ s/^\s+//;
	$contents =~ s/\s+$//;
    }
    foreach $line (split "\n", $contents) {
	if (! $output_preformatted) {
	    $line =~ s/^\s*//;
	}
	if ($line eq ""){
	    if (! $output_preformatted) {
		print $lineprefix, local_unescape($blankline);
	    }
	} else {
	    $line =~ s/\\\\\\/\&/g;
	    if ($output_mode eq "man" && substr($line, 0, 1) eq ".") {
		print "\\&$line";
	    } else {
		print $lineprefix, $line;
	    }
	}
	print "\n";
    }
}

# output sections in html
sub output_section_html(%) {
    my %args = %{$_[0]};
    my $section;

    foreach $section (@{$args{'sectionlist'}}) {
	print "<h3>$section</h3>\n";
	print "<blockquote>\n";
	output_highlight($args{'sections'}{$section});
	print "</blockquote>\n";
    }
}

# output enum in html
sub output_enum_html(%) {
    my %args = %{$_[0]};
    my ($parameter);
    my $count;
    print "<h2>enum " . $args{'enum'} . "</h2>\n";

    print "<b>enum " . $args{'enum'} . "</b> {<br>\n";
    $count = 0;
    foreach $parameter (@{$args{'parameterlist'}}) {
	print " <b>" . $parameter . "</b>";
	if ($count != $#{$args{'parameterlist'}}) {
	    $count++;
	    print ",\n";
	}
	print "<br>";
    }
    print "};<br>\n";

    print "<h3>Constants</h3>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	print "<dt><b>" . $parameter . "</b>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter});
    }
    print "</dl>\n";
    output_section_html(@_);
    print "<hr>\n";
}

# output typedef in html
sub output_typedef_html(%) {
    my %args = %{$_[0]};
    my ($parameter);
    my $count;
    print "<h2>typedef " . $args{'typedef'} . "</h2>\n";

    print "<b>typedef " . $args{'typedef'} . "</b>\n";
    output_section_html(@_);
    print "<hr>\n";
}

# output struct in html
sub output_struct_html(%) {
    my %args = %{$_[0]};
    my ($parameter);

    print "<h2>" . $args{'type'} . " " . $args{'struct'} . " - " . $args{'purpose'} . "</h2>\n";
    print "<b>" . $args{'type'} . " " . $args{'struct'} . "</b> {<br>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	if ($parameter =~ /^#/) {
		print "$parameter<br>\n";
		next;
	}
	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	$type = $args{'parametertypes'}{$parameter};
	if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
	    # pointer-to-function
	    print "&nbsp; &nbsp; <i>$1</i><b>$parameter</b>) <i>($2)</i>;<br>\n";
	} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
	    # bitfield
	    print "&nbsp; &nbsp; <i>$1</i> <b>$parameter</b>$2;<br>\n";
	} else {
	    print "&nbsp; &nbsp; <i>$type</i> <b>$parameter</b>;<br>\n";
	}
    }
    print "};<br>\n";

    print "<h3>Members</h3>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	($parameter =~ /^#/) && next;

	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	print "<dt><b>" . $parameter . "</b>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter_name});
    }
    print "</dl>\n";
    output_section_html(@_);
    print "<hr>\n";
}

# output function in html
sub output_function_html(%) {
    my %args = %{$_[0]};
    my ($parameter, $section);
    my $count;

    print "<h2>" . $args{'function'} . " - " . $args{'purpose'} . "</h2>\n";
    print "<i>" . $args{'functiontype'} . "</i>\n";
    print "<b>" . $args{'function'} . "</b>\n";
    print "(";
    $count = 0;
    foreach $parameter (@{$args{'parameterlist'}}) {
	$type = $args{'parametertypes'}{$parameter};
	if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
	    # pointer-to-function
	    print "<i>$1</i><b>$parameter</b>) <i>($2)</i>";
	} else {
	    print "<i>" . $type . "</i> <b>" . $parameter . "</b>";
	}
	if ($count != $#{$args{'parameterlist'}}) {
	    $count++;
	    print ",\n";
	}
    }
    print ")\n";

    print "<h3>Arguments</h3>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	print "<dt><b>" . $parameter . "</b>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter_name});
    }
    print "</dl>\n";
    output_section_html(@_);
    print "<hr>\n";
}

# output DOC: block header in html
sub output_blockhead_html(%) {
    my %args = %{$_[0]};
    my ($parameter, $section);
    my $count;

    foreach $section (@{$args{'sectionlist'}}) {
	print "<h3>$section</h3>\n";
	print "<ul>\n";
	output_highlight($args{'sections'}{$section});
	print "</ul>\n";
    }
    print "<hr>\n";
}

# output sections in html5
sub output_section_html5(%) {
    my %args = %{$_[0]};
    my $section;

    foreach $section (@{$args{'sectionlist'}}) {
	print "<section>\n";
	print "<h1>$section</h1>\n";
	print "<p>\n";
	output_highlight($args{'sections'}{$section});
	print "</p>\n";
	print "</section>\n";
    }
}

# output enum in html5
sub output_enum_html5(%) {
    my %args = %{$_[0]};
    my ($parameter);
    my $count;
    my $html5id;

    $html5id = $args{'enum'};
    $html5id =~ s/[^a-zA-Z0-9\-]+/_/g;
    print "<article class=\"enum\" id=\"enum:". $html5id . "\">";
    print "<h1>enum " . $args{'enum'} . "</h1>\n";
    print "<ol class=\"code\">\n";
    print "<li>";
    print "<span class=\"keyword\">enum</span> ";
    print "<span class=\"identifier\">" . $args{'enum'} . "</span> {";
    print "</li>\n";
    $count = 0;
    foreach $parameter (@{$args{'parameterlist'}}) {
	print "<li class=\"indent\">";
	print "<span class=\"param\">" . $parameter . "</span>";
	if ($count != $#{$args{'parameterlist'}}) {
	    $count++;
	    print ",";
	}
	print "</li>\n";
    }
    print "<li>};</li>\n";
    print "</ol>\n";

    print "<section>\n";
    print "<h1>Constants</h1>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	print "<dt>" . $parameter . "</dt>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter});
	print "</dd>\n";
    }
    print "</dl>\n";
    print "</section>\n";
    output_section_html5(@_);
    print "</article>\n";
}

# output typedef in html5
sub output_typedef_html5(%) {
    my %args = %{$_[0]};
    my ($parameter);
    my $count;
    my $html5id;

    $html5id = $args{'typedef'};
    $html5id =~ s/[^a-zA-Z0-9\-]+/_/g;
    print "<article class=\"typedef\" id=\"typedef:" . $html5id . "\">\n";
    print "<h1>typedef " . $args{'typedef'} . "</h1>\n";

    print "<ol class=\"code\">\n";
    print "<li>";
    print "<span class=\"keyword\">typedef</span> ";
    print "<span class=\"identifier\">" . $args{'typedef'} . "</span>";
    print "</li>\n";
    print "</ol>\n";
    output_section_html5(@_);
    print "</article>\n";
}

# output struct in html5
sub output_struct_html5(%) {
    my %args = %{$_[0]};
    my ($parameter);
    my $html5id;

    $html5id = $args{'struct'};
    $html5id =~ s/[^a-zA-Z0-9\-]+/_/g;
    print "<article class=\"struct\" id=\"struct:" . $html5id . "\">\n";
    print "<hgroup>\n";
    print "<h1>" . $args{'type'} . " " . $args{'struct'} . "</h1>";
    print "<h2>". $args{'purpose'} . "</h2>\n";
    print "</hgroup>\n";
    print "<ol class=\"code\">\n";
    print "<li>";
    print "<span class=\"type\">" . $args{'type'} . "</span> ";
    print "<span class=\"identifier\">" . $args{'struct'} . "</span> {";
    print "</li>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	print "<li class=\"indent\">";
	if ($parameter =~ /^#/) {
		print "<span class=\"param\">" . $parameter ."</span>\n";
		print "</li>\n";
		next;
	}
	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	$type = $args{'parametertypes'}{$parameter};
	if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
	    # pointer-to-function
	    print "<span class=\"type\">$1</span> ";
	    print "<span class=\"param\">$parameter</span>";
	    print "<span class=\"type\">)</span> ";
	    print "(<span class=\"args\">$2</span>);";
	} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
	    # bitfield
	    print "<span class=\"type\">$1</span> ";
	    print "<span class=\"param\">$parameter</span>";
	    print "<span class=\"bits\">$2</span>;";
	} else {
	    print "<span class=\"type\">$type</span> ";
	    print "<span class=\"param\">$parameter</span>;";
	}
	print "</li>\n";
    }
    print "<li>};</li>\n";
    print "</ol>\n";

    print "<section>\n";
    print "<h1>Members</h1>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	($parameter =~ /^#/) && next;

	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	print "<dt>" . $parameter . "</dt>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter_name});
	print "</dd>\n";
    }
    print "</dl>\n";
    print "</section>\n";
    output_section_html5(@_);
    print "</article>\n";
}

# output function in html5
sub output_function_html5(%) {
    my %args = %{$_[0]};
    my ($parameter, $section);
    my $count;
    my $html5id;

    $html5id = $args{'function'};
    $html5id =~ s/[^a-zA-Z0-9\-]+/_/g;
    print "<article class=\"function\" id=\"func:". $html5id . "\">\n";
    print "<hgroup>\n";
    print "<h1>" . $args{'function'} . "</h1>";
    print "<h2>" . $args{'purpose'} . "</h2>\n";
    print "</hgroup>\n";
    print "<ol class=\"code\">\n";
    print "<li>";
    print "<span class=\"type\">" . $args{'functiontype'} . "</span> ";
    print "<span class=\"identifier\">" . $args{'function'} . "</span> (";
    print "</li>";
    $count = 0;
    foreach $parameter (@{$args{'parameterlist'}}) {
	print "<li class=\"indent\">";
	$type = $args{'parametertypes'}{$parameter};
	if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
	    # pointer-to-function
	    print "<span class=\"type\">$1</span> ";
	    print "<span class=\"param\">$parameter</span>";
	    print "<span class=\"type\">)</span> ";
	    print "(<span class=\"args\">$2</span>)";
	} else {
	    print "<span class=\"type\">$type</span> ";
	    print "<span class=\"param\">$parameter</span>";
	}
	if ($count != $#{$args{'parameterlist'}}) {
	    $count++;
	    print ",";
	}
	print "</li>\n";
    }
    print "<li>)</li>\n";
    print "</ol>\n";

    print "<section>\n";
    print "<h1>Arguments</h1>\n";
    print "<p>\n";
    print "<dl>\n";
    foreach $parameter (@{$args{'parameterlist'}}) {
	my $parameter_name = $parameter;
	$parameter_name =~ s/\[.*//;

	($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
	print "<dt>" . $parameter . "</dt>\n";
	print "<dd>";
	output_highlight($args{'parameterdescs'}{$parameter_name});
	print "</dd>\n";
    }
    print "</dl>\n";
    print "</section>\n";
    output_section_html5(@_);
    print "</article>\n";
}

# output DOC: block header in html5
sub output_blockhead_html5(%) {
    my %args = %{$_[0]};
    my ($parameter, $section);
    my $count;
    my $html5id;

    foreach $section (@{$args{'sectionlist'}}) {
	$html5id = $section;
	$html5id =~ s/[^a-zA-Z0-9\-]+/_/g;
	print "<article class=\"doc\" id=\"doc:". $html5id . "\">\n";
	print "<h1>$section</h1>\n";
	print "<p>\n";
	output_highlight($args{'sections'}{$section});
	print "</p>\n";
    }
    print "</article>\n";
}

sub output_section_xml(%) {
    my %args = %{$_[0]};
    my $section;
    # print out each section
    $lineprefix="   ";
    foreach $section (@{$args{'sectionlist'}}) {
	print "<refsect1>\n";
	print "<title>$section</title>\n";
	if ($section =~ m/EXAMPLE/i) {
	    print "<informalexample><programlisting>\n";
	    $output_preformatted = 1;
	} else {
	    print "<para>\n";
	}
	output_highlight($args{'sections'}{$section});
	$output_preformatted = 0;
	if ($section =~ m/EXAMPLE/i) {
	    print "</programlisting></informalexample>\n";
	} else {
	    print "</para>\n";
	}
	print "</refsect1>\n";
    }
}