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linux/scripts/kernel-doc
Mauro Carvalho Chehab bdfe2be34b scripts: kernel-doc: change default to ReST format 
Right now, if kernel-doc is called without arguments, it
defaults to man pages. IMO, it makes more sense to
default to ReST, as this is the output that it is most
used nowadays, and it easier to check if everything got
parsed fine on an enriched text mode format.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2017-12-21 13:41:46 -07:00

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#!/usr/bin/env perl
use warnings;
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/doc-guide/kernel-doc.rst for the documentation comment syntax.
Output format selection (mutually exclusive):
-man Output troff manual page format. This is the default.
-rst Output reStructuredText format.
-none Do not output documentation, only warnings.
Output selection (mutually exclusive):
-export Only output documentation for symbols that have been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
in any input FILE or -export-file FILE.
-internal Only output documentation for symbols that have NOT been
exported using EXPORT_SYMBOL() or EXPORT_SYMBOL_GPL()
in any input FILE or -export-file FILE.
-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.
-enable-lineno Enable output of #define LINENO lines. Only works with
reStructuredText format.
-export-file FILE Specify an additional FILE in which to look for
EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL(). To be used with
-export or -internal. May be specified multiple times.
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')
# '&struct_name.member' - name of a structure member
# '@parameter' - name of a parameter
# '%CONST' - name of a constant.
# '``LITERAL``' - literal string without any spaces on it.
## 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 = '\b``([^\`]+)``\b';
my $type_constant2 = '\%([-_\w]+)';
my $type_func = '(\w+)\(\)';
my $type_param = '\@(\w+(\.\.\.)?)';
my $type_fp_param = '\@(\w+)\(\)'; # Special RST handling for func ptr params
my $type_env = '(\$\w+)';
my $type_enum = '\&(enum\s*([_\w]+))';
my $type_struct = '\&(struct\s*([_\w]+))';
my $type_typedef = '\&(typedef\s*([_\w]+))';
my $type_union = '\&(union\s*([_\w]+))';
my $type_member = '\&([_\w]+)(\.|->)([_\w]+)';
my $type_fallback = '\&([_\w]+)';
my $type_member_func = $type_member . '\(\)';
# Output conversion substitutions.
# One for each output format
# these are pretty rough
my @highlights_man = (
[$type_constant, "\$1"],
[$type_constant2, "\$1"],
[$type_func, "\\\\fB\$1\\\\fP"],
[$type_enum, "\\\\fI\$1\\\\fP"],
[$type_struct, "\\\\fI\$1\\\\fP"],
[$type_typedef, "\\\\fI\$1\\\\fP"],
[$type_union, "\\\\fI\$1\\\\fP"],
[$type_param, "\\\\fI\$1\\\\fP"],
[$type_member, "\\\\fI\$1\$2\$3\\\\fP"],
[$type_fallback, "\\\\fI\$1\\\\fP"]
);
my $blankline_man = "";
# rst-mode
my @highlights_rst = (
[$type_constant, "``\$1``"],
[$type_constant2, "``\$1``"],
# Note: need to escape () to avoid func matching later
[$type_member_func, "\\:c\\:type\\:`\$1\$2\$3\\\\(\\\\) <\$1>`"],
[$type_member, "\\:c\\:type\\:`\$1\$2\$3 <\$1>`"],
[$type_fp_param, "**\$1\\\\(\\\\)**"],
[$type_func, "\\:c\\:func\\:`\$1()`"],
[$type_enum, "\\:c\\:type\\:`\$1 <\$2>`"],
[$type_struct, "\\:c\\:type\\:`\$1 <\$2>`"],
[$type_typedef, "\\:c\\:type\\:`\$1 <\$2>`"],
[$type_union, "\\:c\\:type\\:`\$1 <\$2>`"],
# in rst this can refer to any type
[$type_fallback, "\\:c\\:type\\:`\$1`"],
[$type_param, "**\$1**"]
);
my $blankline_rst = "\n";
# read arguments
if ($#ARGV == -1) {
usage();
}
my $kernelversion;
my $dohighlight = "";
my $verbose = 0;
my $output_mode = "rst";
my $output_preformatted = 0;
my $no_doc_sections = 0;
my $enable_lineno = 0;
my @highlights = @highlights_rst;
my $blankline = $blankline_rst;
my $modulename = "Kernel API";
use constant {
OUTPUT_ALL => 0, # output all symbols and doc sections
OUTPUT_INCLUDE => 1, # output only specified symbols
OUTPUT_EXCLUDE => 2, # output everything except specified symbols
OUTPUT_EXPORTED => 3, # output exported symbols
OUTPUT_INTERNAL => 4, # output non-exported symbols
};
my $output_selection = OUTPUT_ALL;
my $show_not_found = 0;
my @export_file_list;
my @build_time;
if (defined($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 $declaration_start_line;
my ($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="";
# Parser states
use constant {
STATE_NORMAL => 0, # normal code
STATE_NAME => 1, # looking for function name
STATE_FIELD => 2, # scanning field start
STATE_PROTO => 3, # scanning prototype
STATE_DOCBLOCK => 4, # documentation block
STATE_INLINE => 5, # gathering documentation outside main block
};
my $state;
my $in_doc_sect;
# Inline documentation state
use constant {
STATE_INLINE_NA => 0, # not applicable ($state != STATE_INLINE)
STATE_INLINE_NAME => 1, # looking for member name (@foo:)
STATE_INLINE_TEXT => 2, # looking for member documentation
STATE_INLINE_END => 3, # done
STATE_INLINE_ERROR => 4, # error - Comment without header was found.
# Spit a warning as it's not
# proper kernel-doc and ignore the rest.
};
my $inline_doc_state;
#declaration types: can be
# 'function', 'struct', 'union', 'enum', 'typedef'
my $decl_type;
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+)';
# @params and a strictly limited set of supported section names
my $doc_sect = $doc_com .
'\s*(\@[.\w]+|\@\.\.\.|description|context|returns?|notes?|examples?)\s*:(.*)';
my $doc_content = $doc_com_body . '(.*)';
my $doc_block = $doc_com . 'DOC:\s*(.*)?';
my $doc_inline_start = '^\s*/\*\*\s*$';
my $doc_inline_sect = '\s*\*\s*(@[\w\s]+):(.*)';
my $doc_inline_end = '^\s*\*/\s*$';
my $doc_inline_oneline = '^\s*/\*\*\s*(@[\w\s]+):\s*(.*)\s*\*/\s*$';
my $export_symbol = '^\s*EXPORT_SYMBOL(_GPL)?\s*\(\s*(\w+)\s*\)\s*;';
my %parameterdescs;
my %parameterdesc_start_lines;
my @parameterlist;
my %sections;
my @sectionlist;
my %section_start_lines;
my $sectcheck;
my $struct_actual;
my $contents = "";
my $new_start_line = 0;
# the canonical section names. see also $doc_sect above.
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 = $1;
shift @ARGV;
if ($cmd eq "man") {
$output_mode = "man";
@highlights = @highlights_man;
$blankline = $blankline_man;
} elsif ($cmd eq "rst") {
$output_mode = "rst";
@highlights = @highlights_rst;
$blankline = $blankline_rst;
} elsif ($cmd eq "none") {
$output_mode = "none";
} elsif ($cmd eq "module") { # not needed for XML, inherits from calling document
$modulename = shift @ARGV;
} elsif ($cmd eq "function") { # to only output specific functions
$output_selection = OUTPUT_INCLUDE;
$function = shift @ARGV;
$function_table{$function} = 1;
} elsif ($cmd eq "nofunction") { # output all except specific functions
$output_selection = OUTPUT_EXCLUDE;
$function = shift @ARGV;
$function_table{$function} = 1;
} elsif ($cmd eq "export") { # only exported symbols
$output_selection = OUTPUT_EXPORTED;
%function_table = ();
} elsif ($cmd eq "internal") { # only non-exported symbols
$output_selection = OUTPUT_INTERNAL;
%function_table = ();
} elsif ($cmd eq "export-file") {
my $file = shift @ARGV;
push(@export_file_list, $file);
} elsif ($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 'enable-lineno') {
$enable_lineno = 1;
} elsif ($cmd eq 'show-not-found') {
$show_not_found = 1;
} else {
# Unknown argument
usage();
}
}
# 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;
}
#
sub print_lineno {
my $lineno = shift;
if ($enable_lineno && defined($lineno)) {
print "#define LINENO " . $lineno . "\n";
}
}
##
# 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_param/) {
$name = $1;
$parameterdescs{$name} = $contents;
$sectcheck = $sectcheck . $name . " ";
$parameterdesc_start_lines{$name} = $new_start_line;
$new_start_line = 0;
} elsif ($name eq "@\.\.\.") {
$name = "...";
$parameterdescs{$name} = $contents;
$sectcheck = $sectcheck . $name . " ";
$parameterdesc_start_lines{$name} = $new_start_line;
$new_start_line = 0;
} else {
if (defined($sections{$name}) && ($sections{$name} ne "")) {
# Only warn on user specified duplicate section names.
if ($name ne $section_default) {
print STDERR "${file}:$.: warning: duplicate section name '$name'\n";
++$warnings;
}
$sections{$name} .= $contents;
} else {
$sections{$name} = $contents;
push @sectionlist, $name;
$section_start_lines{$name} = $new_start_line;
$new_start_line = 0;
}
}
}
##
# 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 (($output_selection == OUTPUT_ALL) ||
($output_selection == OUTPUT_INCLUDE &&
defined($function_table{$name})) ||
($output_selection == OUTPUT_EXCLUDE &&
!defined($function_table{$name})))
{
dump_section($file, $name, $contents);
output_blockhead({'sectionlist' => \@sectionlist,
'sections' => \%sections,
'module' => $modulename,
'content-only' => ($output_selection != OUTPUT_ALL), });
}
}
##
# 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 $contents) {
# use Carp;
# confess "output_highlight got called with no args?\n";
# }
# print STDERR "contents b4:$contents\n";
eval $dohighlight;
die $@ if $@;
# print STDERR "contents af:$contents\n";
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, $line;
}
}
print "\n";
}
}
##
# output function in man
sub output_function_man(%) {
my %args = %{$_[0]};
my ($parameter, $section);
my $count;
print ".TH \"$args{'function'}\" 9 \"$args{'function'}\" \"$man_date\" \"Kernel Hacker's Manual\" LINUX\n";
print ".SH NAME\n";
print $args{'function'} . " \\- " . $args{'purpose'} . "\n";
print ".SH SYNOPSIS\n";
if ($args{'functiontype'} ne "") {
print ".B \"" . $args{'functiontype'} . "\" " . $args{'function'} . "\n";
} else {
print ".B \"" . $args{'function'} . "\n";
}
$count = 0;
my $parenth = "(";
my $post = ",";
foreach my $parameter (@{$args{'parameterlist'}}) {
if ($count == $#{$args{'parameterlist'}}) {
$post = ");";
}
$type = $args{'parametertypes'}{$parameter};
if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
# pointer-to-function
print ".BI \"" . $parenth . $1 . "\" " . $parameter . " \") (" . $2 . ")" . $post . "\"\n";
} else {
$type =~ s/([^\*])$/$1 /;
print ".BI \"" . $parenth . $type . "\" " . $parameter . " \"" . $post . "\"\n";
}
$count++;
$parenth = "";
}
print ".SH ARGUMENTS\n";
foreach $parameter (@{$args{'parameterlist'}}) {
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
print ".IP \"" . $parameter . "\" 12\n";
output_highlight($args{'parameterdescs'}{$parameter_name});
}
foreach $section (@{$args{'sectionlist'}}) {
print ".SH \"", uc $section, "\"\n";
output_highlight($args{'sections'}{$section});
}
}
##
# output enum in man
sub output_enum_man(%) {
my %args = %{$_[0]};
my ($parameter, $section);
my $count;
print ".TH \"$args{'module'}\" 9 \"enum $args{'enum'}\" \"$man_date\" \"API Manual\" LINUX\n";
print ".SH NAME\n";
print "enum " . $args{'enum'} . " \\- " . $args{'purpose'} . "\n";
print ".SH SYNOPSIS\n";
print "enum " . $args{'enum'} . " {\n";
$count = 0;
foreach my $parameter (@{$args{'parameterlist'}}) {
print ".br\n.BI \" $parameter\"\n";
if ($count == $#{$args{'parameterlist'}}) {
print "\n};\n";
last;
}
else {
print ", \n.br\n";
}
$count++;
}
print ".SH Constants\n";
foreach $parameter (@{$args{'parameterlist'}}) {
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
print ".IP \"" . $parameter . "\" 12\n";
output_highlight($args{'parameterdescs'}{$parameter_name});
}
foreach $section (@{$args{'sectionlist'}}) {
print ".SH \"$section\"\n";
output_highlight($args{'sections'}{$section});
}
}
##
# output struct in man
sub output_struct_man(%) {
my %args = %{$_[0]};
my ($parameter, $section);
print ".TH \"$args{'module'}\" 9 \"" . $args{'type'} . " " . $args{'struct'} . "\" \"$man_date\" \"API Manual\" LINUX\n";
print ".SH NAME\n";
print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
print ".SH SYNOPSIS\n";
print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
foreach my $parameter (@{$args{'parameterlist'}}) {
if ($parameter =~ /^#/) {
print ".BI \"$parameter\"\n.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 ".BI \" " . $1 . "\" " . $parameter . " \") (" . $2 . ")" . "\"\n;\n";
} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
# bitfield
print ".BI \" " . $1 . "\ \" " . $parameter . $2 . " \"" . "\"\n;\n";
} else {
$type =~ s/([^\*])$/$1 /;
print ".BI \" " . $type . "\" " . $parameter . " \"" . "\"\n;\n";
}
print "\n.br\n";
}
print "};\n.br\n";
print ".SH Members\n";
foreach $parameter (@{$args{'parameterlist'}}) {
($parameter =~ /^#/) && next;
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
print ".IP \"" . $parameter . "\" 12\n";
output_highlight($args{'parameterdescs'}{$parameter_name});
}
foreach $section (@{$args{'sectionlist'}}) {
print ".SH \"$section\"\n";
output_highlight($args{'sections'}{$section});
}
}
##
# output typedef in man
sub output_typedef_man(%) {
my %args = %{$_[0]};
my ($parameter, $section);
print ".TH \"$args{'module'}\" 9 \"$args{'typedef'}\" \"$man_date\" \"API Manual\" LINUX\n";
print ".SH NAME\n";
print "typedef " . $args{'typedef'} . " \\- " . $args{'purpose'} . "\n";
foreach $section (@{$args{'sectionlist'}}) {
print ".SH \"$section\"\n";
output_highlight($args{'sections'}{$section});
}
}
sub output_blockhead_man(%) {
my %args = %{$_[0]};
my ($parameter, $section);
my $count;
print ".TH \"$args{'module'}\" 9 \"$args{'module'}\" \"$man_date\" \"API Manual\" LINUX\n";
foreach $section (@{$args{'sectionlist'}}) {
print ".SH \"$section\"\n";
output_highlight($args{'sections'}{$section});
}
}
##
# output in restructured text
#
#
# This could use some work; it's used to output the DOC: sections, and
# starts by putting out the name of the doc section itself, but that tends
# to duplicate a header already in the template file.
#
sub output_blockhead_rst(%) {
my %args = %{$_[0]};
my ($parameter, $section);
foreach $section (@{$args{'sectionlist'}}) {
if ($output_selection != OUTPUT_INCLUDE) {
print "**$section**\n\n";
}
print_lineno($section_start_lines{$section});
output_highlight_rst($args{'sections'}{$section});
print "\n";
}
}
sub output_highlight_rst {
my $contents = join "\n",@_;
my $line;
# undo the evil effects of xml_escape() earlier
$contents = xml_unescape($contents);
eval $dohighlight;
die $@ if $@;
foreach $line (split "\n", $contents) {
print $lineprefix . $line . "\n";
}
}
sub output_function_rst(%) {
my %args = %{$_[0]};
my ($parameter, $section);
my $oldprefix = $lineprefix;
my $start = "";
if ($args{'typedef'}) {
print ".. c:type:: ". $args{'function'} . "\n\n";
print_lineno($declaration_start_line);
print " **Typedef**: ";
$lineprefix = "";
output_highlight_rst($args{'purpose'});
$start = "\n\n**Syntax**\n\n ``";
} else {
print ".. c:function:: ";
}
if ($args{'functiontype'} ne "") {
$start .= $args{'functiontype'} . " " . $args{'function'} . " (";
} else {
$start .= $args{'function'} . " (";
}
print $start;
my $count = 0;
foreach my $parameter (@{$args{'parameterlist'}}) {
if ($count ne 0) {
print ", ";
}
$count++;
$type = $args{'parametertypes'}{$parameter};
if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
# pointer-to-function
print $1 . $parameter . ") (" . $2;
} else {
print $type . " " . $parameter;
}
}
if ($args{'typedef'}) {
print ");``\n\n";
} else {
print ")\n\n";
print_lineno($declaration_start_line);
$lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
}
print "**Parameters**\n\n";
$lineprefix = " ";
foreach $parameter (@{$args{'parameterlist'}}) {
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
$type = $args{'parametertypes'}{$parameter};
if ($type ne "") {
print "``$type $parameter``\n";
} else {
print "``$parameter``\n";
}
print_lineno($parameterdesc_start_lines{$parameter_name});
if (defined($args{'parameterdescs'}{$parameter_name}) &&
$args{'parameterdescs'}{$parameter_name} ne $undescribed) {
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
} else {
print " *undescribed*\n";
}
print "\n";
}
$lineprefix = $oldprefix;
output_section_rst(@_);
}
sub output_section_rst(%) {
my %args = %{$_[0]};
my $section;
my $oldprefix = $lineprefix;
$lineprefix = "";
foreach $section (@{$args{'sectionlist'}}) {
print "**$section**\n\n";
print_lineno($section_start_lines{$section});
output_highlight_rst($args{'sections'}{$section});
print "\n";
}
print "\n";
$lineprefix = $oldprefix;
}
sub output_enum_rst(%) {
my %args = %{$_[0]};
my ($parameter);
my $oldprefix = $lineprefix;
my $count;
my $name = "enum " . $args{'enum'};
print "\n\n.. c:type:: " . $name . "\n\n";
print_lineno($declaration_start_line);
$lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
print "**Constants**\n\n";
$lineprefix = " ";
foreach $parameter (@{$args{'parameterlist'}}) {
print "``$parameter``\n";
if ($args{'parameterdescs'}{$parameter} ne $undescribed) {
output_highlight_rst($args{'parameterdescs'}{$parameter});
} else {
print " *undescribed*\n";
}
print "\n";
}
$lineprefix = $oldprefix;
output_section_rst(@_);
}
sub output_typedef_rst(%) {
my %args = %{$_[0]};
my ($parameter);
my $oldprefix = $lineprefix;
my $name = "typedef " . $args{'typedef'};
print "\n\n.. c:type:: " . $name . "\n\n";
print_lineno($declaration_start_line);
$lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
$lineprefix = $oldprefix;
output_section_rst(@_);
}
sub output_struct_rst(%) {
my %args = %{$_[0]};
my ($parameter);
my $oldprefix = $lineprefix;
my $name = $args{'type'} . " " . $args{'struct'};
print "\n\n.. c:type:: " . $name . "\n\n";
print_lineno($declaration_start_line);
$lineprefix = " ";
output_highlight_rst($args{'purpose'});
print "\n";
print "**Definition**\n\n";
print "::\n\n";
print " " . $args{'type'} . " " . $args{'struct'} . " {\n";
foreach $parameter (@{$args{'parameterlist'}}) {
if ($parameter =~ /^#/) {
print " " . "$parameter\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 " $1 $parameter) ($2);\n";
} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
# bitfield
print " $1 $parameter$2;\n";
} else {
print " " . $type . " " . $parameter . ";\n";
}
}
print " };\n\n";
print "**Members**\n\n";
$lineprefix = " ";
foreach $parameter (@{$args{'parameterlist'}}) {
($parameter =~ /^#/) && next;
my $parameter_name = $parameter;
$parameter_name =~ s/\[.*//;
($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
$type = $args{'parametertypes'}{$parameter};
print_lineno($parameterdesc_start_lines{$parameter_name});
print "``" . $parameter . "``\n";
output_highlight_rst($args{'parameterdescs'}{$parameter_name});
print "\n";
}
print "\n";
$lineprefix = $oldprefix;
output_section_rst(@_);
}
## none mode output functions
sub output_function_none(%) {
}
sub output_enum_none(%) {
}
sub output_typedef_none(%) {
}
sub output_struct_none(%) {
}
sub output_blockhead_none(%) {
}
##
# generic output function for all types (function, struct/union, typedef, enum);
# calls the generated, variable output_ function name based on
# functype and output_mode
sub output_declaration {
no strict 'refs';
my $name = shift;
my $functype = shift;
my $func = "output_${functype}_$output_mode";
if (($output_selection == OUTPUT_ALL) ||
(($output_selection == OUTPUT_INCLUDE ||
$output_selection == OUTPUT_EXPORTED) &&
defined($function_table{$name})) ||
(($output_selection == OUTPUT_EXCLUDE ||
$output_selection == OUTPUT_INTERNAL) &&
!($functype eq "function" && defined($function_table{$name}))))
{
&$func(@_);
$section_counter++;
}
}
##
# generic output function - calls the right one based on current output mode.
sub output_blockhead {
no strict 'refs';
my $func = "output_blockhead_" . $output_mode;
&$func(@_);
$section_counter++;
}
##
# takes a declaration (struct, union, enum, typedef) and
# invokes the right handler. NOT called for functions.
sub dump_declaration($$) {
no strict 'refs';
my ($prototype, $file) = @_;
my $func = "dump_" . $decl_type;
&$func(@_);
}
sub dump_union($$) {
dump_struct(@_);
}
sub dump_struct($$) {
my $x = shift;
my $file = shift;
my $nested;
if ($x =~ /(struct|union)\s+(\w+)\s*{(.*)}/) {
my $decl_type = $1;
$declaration_name = $2;
my $members = $3;
# ignore embedded structs or unions
$members =~ s/({.*})//g;
$nested = $1;
# ignore members marked private:
$members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
$members =~ s/\/\*\s*private:.*//gosi;
# strip comments:
$members =~ s/\/\*.*?\*\///gos;
$nested =~ s/\/\*.*?\*\///gos;
# strip attributes
$members =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
$members =~ s/__aligned\s*\([^;]*\)//gos;
$members =~ s/\s*CRYPTO_MINALIGN_ATTR//gos;
# replace DECLARE_BITMAP
$members =~ s/DECLARE_BITMAP\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[BITS_TO_LONGS($2)\]/gos;
# replace DECLARE_HASHTABLE
$members =~ s/DECLARE_HASHTABLE\s*\(([^,)]+),\s*([^,)]+)\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
# replace DECLARE_KFIFO
$members =~ s/DECLARE_KFIFO\s*\(([^,)]+),\s*([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
# replace DECLARE_KFIFO_PTR
$members =~ s/DECLARE_KFIFO_PTR\s*\(([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
create_parameterlist($members, ';', $file);
check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual, $nested);
output_declaration($declaration_name,
'struct',
{'struct' => $declaration_name,
'module' => $modulename,
'parameterlist' => \@parameterlist,
'parameterdescs' => \%parameterdescs,
'parametertypes' => \%parametertypes,
'sectionlist' => \@sectionlist,
'sections' => \%sections,
'purpose' => $declaration_purpose,
'type' => $decl_type
});
}
else {
print STDERR "${file}:$.: error: Cannot parse struct or union!\n";
++$errors;
}
}
sub dump_enum($$) {
my $x = shift;
my $file = shift;
$x =~ s@/\*.*?\*/@@gos; # strip comments.
# strip #define macros inside enums
$x =~ s@#\s*((define|ifdef)\s+|endif)[^;]*;@@gos;
if ($x =~ /enum\s+(\w+)\s*{(.*)}/) {
$declaration_name = $1;
my $members = $2;
my %_members;
$members =~ s/\s+$//;
foreach my $arg (split ',', $members) {
$arg =~ s/^\s*(\w+).*/$1/;
push @parameterlist, $arg;
if (!$parameterdescs{$arg}) {
$parameterdescs{$arg} = $undescribed;
print STDERR "${file}:$.: warning: Enum value '$arg' ".
"not described in enum '$declaration_name'\n";
}
$_members{$arg} = 1;
}
while (my ($k, $v) = each %parameterdescs) {
if (!exists($_members{$k})) {
print STDERR "${file}:$.: warning: Excess enum value " .
"'$k' description in '$declaration_name'\n";
}
}
output_declaration($declaration_name,
'enum',
{'enum' => $declaration_name,
'module' => $modulename,
'parameterlist' => \@parameterlist,
'parameterdescs' => \%parameterdescs,
'sectionlist' => \@sectionlist,
'sections' => \%sections,
'purpose' => $declaration_purpose
});
}
else {
print STDERR "${file}:$.: error: Cannot parse enum!\n";
++$errors;
}
}
sub dump_typedef($$) {
my $x = shift;
my $file = shift;
$x =~ s@/\*.*?\*/@@gos; # strip comments.
# Parse function prototypes
if ($x =~ /typedef\s+(\w+)\s*\(\*\s*(\w\S+)\s*\)\s*\((.*)\);/ ||
$x =~ /typedef\s+(\w+)\s*(\w\S+)\s*\s*\((.*)\);/) {
# Function typedefs
$return_type = $1;
$declaration_name = $2;
my $args = $3;
create_parameterlist($args, ',', $file);
output_declaration($declaration_name,
'function',
{'function' => $declaration_name,
'typedef' => 1,
'module' => $modulename,
'functiontype' => $return_type,
'parameterlist' => \@parameterlist,
'parameterdescs' => \%parameterdescs,
'parametertypes' => \%parametertypes,
'sectionlist' => \@sectionlist,
'sections' => \%sections,
'purpose' => $declaration_purpose
});
return;
}
while (($x =~ /\(*.\)\s*;$/) || ($x =~ /\[*.\]\s*;$/)) {
$x =~ s/\(*.\)\s*;$/;/;
$x =~ s/\[*.\]\s*;$/;/;
}
if ($x =~ /typedef.*\s+(\w+)\s*;/) {
$declaration_name = $1;
output_declaration($declaration_name,
'typedef',
{'typedef' => $declaration_name,
'module' => $modulename,
'sectionlist' => \@sectionlist,
'sections' => \%sections,
'purpose' => $declaration_purpose
});
}
else {
print STDERR "${file}:$.: error: Cannot parse typedef!\n";
++$errors;
}
}
sub save_struct_actual($) {
my $actual = shift;
# strip all spaces from the actual param so that it looks like one string item
$actual =~ s/\s*//g;
$struct_actual = $struct_actual . $actual . " ";
}
sub create_parameterlist($$$) {
my $args = shift;
my $splitter = shift;
my $file = shift;
my $type;
my $param;
# temporarily replace commas inside function pointer definition
while ($args =~ /(\([^\),]+),/) {
$args =~ s/(\([^\),]+),/$1#/g;
}
foreach my $arg (split($splitter, $args)) {
# strip comments
$arg =~ s/\/\*.*\*\///;
# strip leading/trailing spaces
$arg =~ s/^\s*//;
$arg =~ s/\s*$//;
$arg =~ s/\s+/ /;
if ($arg =~ /^#/) {
# Treat preprocessor directive as a typeless variable just to fill
# corresponding data structures "correctly". Catch it later in
# output_* subs.
push_parameter($arg, "", $file);
} elsif ($arg =~ m/\(.+\)\s*\(/) {
# pointer-to-function
$arg =~ tr/#/,/;
$arg =~ m/[^\(]+\(\*?\s*(\w*)\s*\)/;
$param = $1;
$type = $arg;
$type =~ s/([^\(]+\(\*?)\s*$param/$1/;
save_struct_actual($param);
push_parameter($param, $type, $file);
} elsif ($arg) {
$arg =~ s/\s*:\s*/:/g;
$arg =~ s/\s*\[/\[/g;
my @args = split('\s*,\s*', $arg);
if ($args[0] =~ m/\*/) {
$args[0] =~ s/(\*+)\s*/ $1/;
}
my @first_arg;
if ($args[0] =~ /^(.*\s+)(.*?\[.*\].*)$/) {
shift @args;
push(@first_arg, split('\s+', $1));
push(@first_arg, $2);
} else {
@first_arg = split('\s+', shift @args);
}
unshift(@args, pop @first_arg);
$type = join " ", @first_arg;
foreach $param (@args) {
if ($param =~ m/^(\*+)\s*(.*)/) {
save_struct_actual($2);
push_parameter($2, "$type $1", $file);
}
elsif ($param =~ m/(.*?):(\d+)/) {
if ($type ne "") { # skip unnamed bit-fields
save_struct_actual($1);
push_parameter($1, "$type:$2", $file)
}
}
else {
save_struct_actual($param);
push_parameter($param, $type, $file);
}
}
}
}
}
sub push_parameter($$$) {
my $param = shift;
my $type = shift;
my $file = shift;
if (($anon_struct_union == 1) && ($type eq "") &&
($param eq "}")) {
return; # ignore the ending }; from anon. struct/union
}
$anon_struct_union = 0;
$param =~ s/[\[\)].*//;
if ($type eq "" && $param =~ /\.\.\.$/)
{
if (!$param =~ /\w\.\.\.$/) {
# handles unnamed variable parameters
$param = "...";
}
if (!defined $parameterdescs{$param} || $parameterdescs{$param} eq "") {
$parameterdescs{$param} = "variable arguments";
}
}
elsif ($type eq "" && ($param eq "" or $param eq "void"))
{
$param="void";
$parameterdescs{void} = "no arguments";
}
elsif ($type eq "" && ($param eq "struct" or $param eq "union"))
# handle unnamed (anonymous) union or struct:
{
$type = $param;
$param = "{unnamed_" . $param . "}";
$parameterdescs{$param} = "anonymous\n";
$anon_struct_union = 1;
}
# warn if parameter has no description
# (but ignore ones starting with # as these are not parameters
# but inline preprocessor statements);
# also ignore unnamed structs/unions;
if (!$anon_struct_union) {
if (!defined $parameterdescs{$param} && $param !~ /^#/) {
$parameterdescs{$param} = $undescribed;
if (($type eq 'function') || ($type eq 'enum')) {
print STDERR "${file}:$.: warning: Function parameter ".
"or member '$param' not " .
"described in '$declaration_name'\n";
}
print STDERR "${file}:$.: warning:" .
" No description found for parameter '$param'\n";
++$warnings;
}
}
$param = xml_escape($param);
# strip spaces from $param so that it is one continuous string
# on @parameterlist;
# this fixes a problem where check_sections() cannot find
# a parameter like "addr[6 + 2]" because it actually appears
# as "addr[6", "+", "2]" on the parameter list;
# but it's better to maintain the param string unchanged for output,
# so just weaken the string compare in check_sections() to ignore
# "[blah" in a parameter string;
###$param =~ s/\s*//g;
push @parameterlist, $param;
$type =~ s/\s\s+/ /g;
$parametertypes{$param} = $type;
}
sub check_sections($$$$$$) {
my ($file, $decl_name, $decl_type, $sectcheck, $prmscheck, $nested) = @_;
my @sects = split ' ', $sectcheck;
my @prms = split ' ', $prmscheck;
my $err;
my ($px, $sx);
my $prm_clean; # strip trailing "[array size]" and/or beginning "*"
foreach $sx (0 .. $#sects) {
$err = 1;
foreach $px (0 .. $#prms) {
$prm_clean = $prms[$px];
$prm_clean =~ s/\[.*\]//;
$prm_clean =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
# ignore array size in a parameter string;
# however, the original param string may contain
# spaces, e.g.: addr[6 + 2]
# and this appears in @prms as "addr[6" since the
# parameter list is split at spaces;
# hence just ignore "[..." for the sections check;
$prm_clean =~ s/\[.*//;
##$prm_clean =~ s/^\**//;
if ($prm_clean eq $sects[$sx]) {
$err = 0;
last;
}
}
if ($err) {
if ($decl_type eq "function") {
print STDERR "${file}:$.: warning: " .
"Excess function parameter " .
"'$sects[$sx]' " .
"description in '$decl_name'\n";
++$warnings;
} else {
if ($nested !~ m/\Q$sects[$sx]\E/) {
print STDERR "${file}:$.: warning: " .
"Excess $decl_type member " .
"'$sects[$sx]' " .
"description in '$decl_name'\n";
++$warnings;
}
}
}
}
}
##
# Checks the section describing the return value of a function.
sub check_return_section {
my $file = shift;
my $declaration_name = shift;
my $return_type = shift;
# Ignore an empty return type (It's a macro)
# Ignore functions with a "void" return type. (But don't ignore "void *")
if (($return_type eq "") || ($return_type =~ /void\s*\w*\s*$/)) {
return;
}
if (!defined($sections{$section_return}) ||
$sections{$section_return} eq "") {
print STDERR "${file}:$.: warning: " .
"No description found for return value of " .
"'$declaration_name'\n";
++$warnings;
}
}
##
# takes a function prototype and the name of the current file being
# processed and spits out all the details stored in the global
# arrays/hashes.
sub dump_function($$) {
my $prototype = shift;
my $file = shift;
my $noret = 0;
$prototype =~ s/^static +//;
$prototype =~ s/^extern +//;
$prototype =~ s/^asmlinkage +//;
$prototype =~ s/^inline +//;
$prototype =~ s/^__inline__ +//;
$prototype =~ s/^__inline +//;
$prototype =~ s/^__always_inline +//;
$prototype =~ s/^noinline +//;
$prototype =~ s/__init +//;
$prototype =~ s/__init_or_module +//;
$prototype =~ s/__meminit +//;
$prototype =~ s/__must_check +//;
$prototype =~ s/__weak +//;
my $define = $prototype =~ s/^#\s*define\s+//; #ak added
$prototype =~ s/__attribute__\s*\(\(
(?:
[\w\s]++ # attribute name
(?:\([^)]*+\))? # attribute arguments
\s*+,? # optional comma at the end
)+
\)\)\s+//x;
# Yes, this truly is vile. We are looking for:
# 1. Return type (may be nothing if we're looking at a macro)
# 2. Function name
# 3. Function parameters.
#
# All the while we have to watch out for function pointer parameters
# (which IIRC is what the two sections are for), C types (these
# regexps don't even start to express all the possibilities), and
# so on.
#
# If you mess with these regexps, it's a good idea to check that
# the following functions' documentation still comes out right:
# - parport_register_device (function pointer parameters)
# - atomic_set (macro)
# - pci_match_device, __copy_to_user (long return type)
if ($define && $prototype =~ m/^()([a-zA-Z0-9_~:]+)\s+/) {
# This is an object-like macro, it has no return type and no parameter
# list.
# Function-like macros are not allowed to have spaces between
# declaration_name and opening parenthesis (notice the \s+).
$return_type = $1;
$declaration_name = $2;
$noret = 1;
} elsif ($prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\(]*)\)/ ||
$prototype =~ m/^()([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+)\s+([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s+\w+\s+\w+\s*\*+)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/ ||
$prototype =~ m/^(\w+\s+\w+\s*\*+\s*\w+\s*\*+\s*)\s*([a-zA-Z0-9_~:]+)\s*\(([^\{]*)\)/) {
$return_type = $1;
$declaration_name = $2;
my $args = $3;
create_parameterlist($args, ',', $file);
} else {
print STDERR "${file}:$.: warning: cannot understand function prototype: '$prototype'\n";
return;
}
my $prms = join " ", @parameterlist;
check_sections($file, $declaration_name, "function", $sectcheck, $prms, "");
# This check emits a lot of warnings at the moment, because many
# functions don't have a 'Return' doc section. So until the number
# of warnings goes sufficiently down, the check is only performed in
# verbose mode.
# TODO: always perform the check.
if ($verbose && !$noret) {
check_return_section($file, $declaration_name, $return_type);
}
output_declaration($declaration_name,
'function',
{'function' => $declaration_name,
'module' => $modulename,
'functiontype' => $return_type,
'parameterlist' => \@parameterlist,
'parameterdescs' => \%parameterdescs,
'parametertypes' => \%parametertypes,
'sectionlist' => \@sectionlist,
'sections' => \%sections,
'purpose' => $declaration_purpose
});
}
sub reset_state {
$function = "";
%parameterdescs = ();
%parametertypes = ();
@parameterlist = ();
%sections = ();
@sectionlist = ();
$sectcheck = "";
$struct_actual = "";
$prototype = "";
$state = STATE_NORMAL;
$inline_doc_state = STATE_INLINE_NA;
}
sub tracepoint_munge($) {
my $file = shift;
my $tracepointname = 0;
my $tracepointargs = 0;
if ($prototype =~ m/TRACE_EVENT\((.*?),/) {
$tracepointname = $1;
}
if ($prototype =~ m/DEFINE_SINGLE_EVENT\((.*?),/) {
$tracepointname = $1;
}
if ($prototype =~ m/DEFINE_EVENT\((.*?),(.*?),/) {
$tracepointname = $2;
}
$tracepointname =~ s/^\s+//; #strip leading whitespace
if ($prototype =~ m/TP_PROTO\((.*?)\)/) {
$tracepointargs = $1;
}
if (($tracepointname eq 0) || ($tracepointargs eq 0)) {
print STDERR "${file}:$.: warning: Unrecognized tracepoint format: \n".
"$prototype\n";
} else {
$prototype = "static inline void trace_$tracepointname($tracepointargs)";
}
}
sub syscall_munge() {
my $void = 0;
$prototype =~ s@[\r\n\t]+@ @gos; # strip newlines/CR's/tabs
## if ($prototype =~ m/SYSCALL_DEFINE0\s*\(\s*(a-zA-Z0-9_)*\s*\)/) {
if ($prototype =~ m/SYSCALL_DEFINE0/) {
$void = 1;
## $prototype = "long sys_$1(void)";
}
$prototype =~ s/SYSCALL_DEFINE.*\(/long sys_/; # fix return type & func name
if ($prototype =~ m/long (sys_.*?),/) {
$prototype =~ s/,/\(/;
} elsif ($void) {
$prototype =~ s/\)/\(void\)/;
}
# now delete all of the odd-number commas in $prototype
# so that arg types & arg names don't have a comma between them
my $count = 0;
my $len = length($prototype);
if ($void) {
$len = 0; # skip the for-loop
}
for (my $ix = 0; $ix < $len; $ix++) {
if (substr($prototype, $ix, 1) eq ',') {
$count++;
if ($count % 2 == 1) {
substr($prototype, $ix, 1) = ' ';
}
}
}
}
sub process_proto_function($$) {
my $x = shift;
my $file = shift;
$x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
if ($x =~ m#\s*/\*\s+MACDOC\s*#io || ($x =~ /^#/ && $x !~ /^#\s*define/)) {
# do nothing
}
elsif ($x =~ /([^\{]*)/) {
$prototype .= $1;
}
if (($x =~ /\{/) || ($x =~ /\#\s*define/) || ($x =~ /;/)) {
$prototype =~ s@/\*.*?\*/@@gos; # strip comments.
$prototype =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
$prototype =~ s@^\s+@@gos; # strip leading spaces
if ($prototype =~ /SYSCALL_DEFINE/) {
syscall_munge();
}
if ($prototype =~ /TRACE_EVENT/ || $prototype =~ /DEFINE_EVENT/ ||
$prototype =~ /DEFINE_SINGLE_EVENT/)
{
tracepoint_munge($file);
}
dump_function($prototype, $file);
reset_state();
}
}
sub process_proto_type($$) {
my $x = shift;
my $file = shift;
$x =~ s@[\r\n]+@ @gos; # strip newlines/cr's.
$x =~ s@^\s+@@gos; # strip leading spaces
$x =~ s@\s+$@@gos; # strip trailing spaces
$x =~ s@\/\/.*$@@gos; # strip C99-style comments to end of line
if ($x =~ /^#/) {
# To distinguish preprocessor directive from regular declaration later.
$x .= ";";
}
while (1) {
if ( $x =~ /([^{};]*)([{};])(.*)/ ) {
if( length $prototype ) {
$prototype .= " "
}
$prototype .= $1 . $2;
($2 eq '{') && $brcount++;
($2 eq '}') && $brcount--;
if (($2 eq ';') && ($brcount == 0)) {
dump_declaration($prototype, $file);
reset_state();
last;
}
$x = $3;
} else {
$prototype .= $x;
last;
}
}
}
# xml_escape: replace <, >, and & in the text stream;
#
# however, formatting controls that are generated internally/locally in the
# kernel-doc script are not escaped here; instead, they begin life like
# $blankline_html (4 of '\' followed by a mnemonic + ':'), then these strings
# are converted to their mnemonic-expected output, without the 4 * '\' & ':',
# just before actual output; (this is done by local_unescape())
sub xml_escape($) {
my $text = shift;
if ($output_mode eq "man") {
return $text;
}
$text =~ s/\&/\\\\\\amp;/g;
$text =~ s/\</\\\\\\lt;/g;
$text =~ s/\>/\\\\\\gt;/g;
return $text;
}
# xml_unescape: reverse the effects of xml_escape
sub xml_unescape($) {
my $text = shift;
if ($output_mode eq "man") {
return $text;
}
$text =~ s/\\\\\\amp;/\&/g;
$text =~ s/\\\\\\lt;/</g;
$text =~ s/\\\\\\gt;/>/g;
return $text;
}
# convert local escape strings to html
# local escape strings look like: '\\\\menmonic:' (that's 4 backslashes)
sub local_unescape($) {
my $text = shift;
if ($output_mode eq "man") {
return $text;
}
$text =~ s/\\\\\\\\lt:/</g;
$text =~ s/\\\\\\\\gt:/>/g;
return $text;
}
sub map_filename($) {
my $file;
my ($orig_file) = @_;
if (defined($ENV{'SRCTREE'})) {
$file = "$ENV{'SRCTREE'}" . "/" . $orig_file;
} else {
$file = $orig_file;
}
if (defined($source_map{$file})) {
$file = $source_map{$file};
}
return $file;
}
sub process_export_file($) {
my ($orig_file) = @_;
my $file = map_filename($orig_file);
if (!open(IN,"<$file")) {
print STDERR "Error: Cannot open file $file\n";
++$errors;
return;
}
while (<IN>) {
if (/$export_symbol/) {
$function_table{$2} = 1;
}
}
close(IN);
}
sub process_file($) {
my $file;
my $identifier;
my $func;
my $descr;
my $in_purpose = 0;
my $initial_section_counter = $section_counter;
my ($orig_file) = @_;
my $leading_space;
$file = map_filename($orig_file);
if (!open(IN,"<$file")) {
print STDERR "Error: Cannot open file $file\n";
++$errors;
return;
}
$. = 1;
$section_counter = 0;
while (<IN>) {
while (s/\\\s*$//) {
$_ .= <IN>;
}
if ($state == STATE_NORMAL) {
if (/$doc_start/o) {
$state = STATE_NAME; # next line is always the function name
$in_doc_sect = 0;
$declaration_start_line = $. + 1;
}
} elsif ($state == STATE_NAME) {# this line is the function name (always)
if (/$doc_block/o) {
$state = STATE_DOCBLOCK;
$contents = "";
$new_start_line = $. + 1;
if ( $1 eq "" ) {
$section = $section_intro;
} else {
$section = $1;
}
}
elsif (/$doc_decl/o) {
$identifier = $1;
if (/\s*([\w\s]+?)\s*-/) {
$identifier = $1;
}
$state = STATE_FIELD;
# if there's no @param blocks need to set up default section
# here
$contents = "";
$section = $section_default;
$new_start_line = $. + 1;
if (/-(.*)/) {
# strip leading/trailing/multiple spaces
$descr= $1;
$descr =~ s/^\s*//;
$descr =~ s/\s*$//;
$descr =~ s/\s+/ /g;
$declaration_purpose = xml_escape($descr);
$in_purpose = 1;
} else {
$declaration_purpose = "";
}
if (($declaration_purpose eq "") && $verbose) {
print STDERR "${file}:$.: warning: missing initial short description on line:\n";
print STDERR $_;
++$warnings;
}
if ($identifier =~ m/^struct/) {
$decl_type = 'struct';
} elsif ($identifier =~ m/^union/) {
$decl_type = 'union';
} elsif ($identifier =~ m/^enum/) {
$decl_type = 'enum';
} elsif ($identifier =~ m/^typedef/) {
$decl_type = 'typedef';
} else {
$decl_type = 'function';
}
if ($verbose) {
print STDERR "${file}:$.: info: Scanning doc for $identifier\n";
}
} else {
print STDERR "${file}:$.: warning: Cannot understand $_ on line $.",
" - I thought it was a doc line\n";
++$warnings;
$state = STATE_NORMAL;
}
} elsif ($state == STATE_FIELD) { # look for head: lines, and include content
if (/$doc_sect/i) { # case insensitive for supported section names
$newsection = $1;
$newcontents = $2;
# map the supported section names to the canonical names
if ($newsection =~ m/^description$/i) {
$newsection = $section_default;
} elsif ($newsection =~ m/^context$/i) {
$newsection = $section_context;
} elsif ($newsection =~ m/^returns?$/i) {
$newsection = $section_return;
} elsif ($newsection =~ m/^\@return$/) {
# special: @return is a section, not a param description
$newsection = $section_return;
}
if (($contents ne "") && ($contents ne "\n")) {
if (!$in_doc_sect && $verbose) {
print STDERR "${file}:$.: warning: contents before sections\n";
++$warnings;
}
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
}
$in_doc_sect = 1;
$in_purpose = 0;
$contents = $newcontents;
$new_start_line = $.;
while ((substr($contents, 0, 1) eq " ") ||
substr($contents, 0, 1) eq "\t") {
$contents = substr($contents, 1);
}
if ($contents ne "") {
$contents .= "\n";
}
$section = $newsection;
$leading_space = undef;
} elsif (/$doc_end/) {
if (($contents ne "") && ($contents ne "\n")) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
}
# look for doc_com + <text> + doc_end:
if ($_ =~ m'\s*\*\s*[a-zA-Z_0-9:\.]+\*/') {
print STDERR "${file}:$.: warning: suspicious ending line: $_";
++$warnings;
}
$prototype = "";
$state = STATE_PROTO;
$brcount = 0;
# print STDERR "end of doc comment, looking for prototype\n";
} elsif (/$doc_content/) {
# miguel-style comment kludge, look for blank lines after
# @parameter line to signify start of description
if ($1 eq "") {
if ($section =~ m/^@/ || $section eq $section_context) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
$new_start_line = $.;
} else {
$contents .= "\n";
}
$in_purpose = 0;
} elsif ($in_purpose == 1) {
# Continued declaration purpose
chomp($declaration_purpose);
$declaration_purpose .= " " . xml_escape($1);
$declaration_purpose =~ s/\s+/ /g;
} else {
my $cont = $1;
if ($section =~ m/^@/ || $section eq $section_context) {
if (!defined $leading_space) {
if ($cont =~ m/^(\s+)/) {
$leading_space = $1;
} else {
$leading_space = "";
}
}
$cont =~ s/^$leading_space//;
}
$contents .= $cont . "\n";
}
} else {
# i dont know - bad line? ignore.
print STDERR "${file}:$.: warning: bad line: $_";
++$warnings;
}
} elsif ($state == STATE_INLINE) { # scanning for inline parameters
# First line (state 1) needs to be a @parameter
if ($inline_doc_state == STATE_INLINE_NAME && /$doc_inline_sect/o) {
$section = $1;
$contents = $2;
$new_start_line = $.;
if ($contents ne "") {
while ((substr($contents, 0, 1) eq " ") ||
substr($contents, 0, 1) eq "\t") {
$contents = substr($contents, 1);
}
$contents .= "\n";
}
$inline_doc_state = STATE_INLINE_TEXT;
# Documentation block end */
} elsif (/$doc_inline_end/) {
if (($contents ne "") && ($contents ne "\n")) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
}
$state = STATE_PROTO;
$inline_doc_state = STATE_INLINE_NA;
# Regular text
} elsif (/$doc_content/) {
if ($inline_doc_state == STATE_INLINE_TEXT) {
$contents .= $1 . "\n";
# nuke leading blank lines
if ($contents =~ /^\s*$/) {
$contents = "";
}
} elsif ($inline_doc_state == STATE_INLINE_NAME) {
$inline_doc_state = STATE_INLINE_ERROR;
print STDERR "${file}:$.: warning: ";
print STDERR "Incorrect use of kernel-doc format: $_";
++$warnings;
}
}
} elsif ($state == STATE_PROTO) { # scanning for function '{' (end of prototype)
if (/$doc_inline_oneline/) {
$section = $1;
$contents = $2;
if ($contents ne "") {
$contents .= "\n";
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
}
} elsif (/$doc_inline_start/) {
$state = STATE_INLINE;
$inline_doc_state = STATE_INLINE_NAME;
} elsif ($decl_type eq 'function') {
process_proto_function($_, $file);
} else {
process_proto_type($_, $file);
}
} elsif ($state == STATE_DOCBLOCK) {
if (/$doc_end/)
{
dump_doc_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
$function = "";
%parameterdescs = ();
%parametertypes = ();
@parameterlist = ();
%sections = ();
@sectionlist = ();
$prototype = "";
$state = STATE_NORMAL;
}
elsif (/$doc_content/)
{
if ( $1 eq "" )
{
$contents .= $blankline;
}
else
{
$contents .= $1 . "\n";
}
}
}
}
if ($initial_section_counter == $section_counter) {
if ($output_mode ne "none") {
print STDERR "${file}:1: warning: no structured comments found\n";
}
if (($output_selection == OUTPUT_INCLUDE) && ($show_not_found == 1)) {
print STDERR " Was looking for '$_'.\n" for keys %function_table;
}
}
}
$kernelversion = get_kernel_version();
# generate a sequence of code that will splice in highlighting information
# using the s// operator.
for (my $k = 0; $k < @highlights; $k++) {
my $pattern = $highlights[$k][0];
my $result = $highlights[$k][1];
# print STDERR "scanning pattern:$pattern, highlight:($result)\n";
$dohighlight .= "\$contents =~ s:$pattern:$result:gs;\n";
}
# Read the file that maps relative names to absolute names for
# separate source and object directories and for shadow trees.
if (open(SOURCE_MAP, "<.tmp_filelist.txt")) {
my ($relname, $absname);
while(<SOURCE_MAP>) {
chop();
($relname, $absname) = (split())[0..1];
$relname =~ s:^/+::;
$source_map{$relname} = $absname;
}
close(SOURCE_MAP);
}
if ($output_selection == OUTPUT_EXPORTED ||
$output_selection == OUTPUT_INTERNAL) {
push(@export_file_list, @ARGV);
foreach (@export_file_list) {
chomp;
process_export_file($_);
}
}
foreach (@ARGV) {
chomp;
process_file($_);
}
if ($verbose && $errors) {
print STDERR "$errors errors\n";
}
if ($verbose && $warnings) {
print STDERR "$warnings warnings\n";
}
exit($output_mode eq "none" ? 0 : $errors);
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