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scripts/kernel-doc Allow struct arguments documentation in struct body

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Describing arguments at top of a struct definition works fine
for small/medium size structs, but it definitely doesn't work well
for struct with a huge list of elements.

Keeping the arguments list inside the struct body makes it easier
to maintain the documentation.
ie:
/**
 * 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 patch allows the use of this kind of syntax. Only one argument
per comment and user can use how many paragraphs he needs. It should
start with /**, which is already being used by kernel-doc. If those
comment doesn't follow those rules, it will be ignored.

Signed-off-by: Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kernel@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Danilo Cesar Lemes de Paula 2015-08-04 09:04:08 -03:00 committed by Jonathan Corbet
parent 64e32895f9
commit a4c6ebede2
1 changed files with 75 additions and 2 deletions
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77
scripts/kernel-doc
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@ -133,6 +133,30 @@ use strict;
#
# 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
@ -296,9 +320,19 @@ my $lineprefix="";
# 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;
@ -313,6 +347,9 @@ 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;
@ -2190,6 +2227,7 @@ sub reset_state {
$prototype = "";
$state = 0;
$split_doc_state = 0;
}
sub tracepoint_munge($) {
@ -2462,7 +2500,6 @@ sub process_file($) {
}
$section = $newsection;
} elsif (/$doc_end/) {
if (($contents ne "") && ($contents ne "\n")) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
@ -2503,8 +2540,44 @@ sub process_file($) {
print STDERR "Warning(${file}:$.): bad line: $_";
++$warnings;
}
} elsif ($state == 5) { # scanning for split parameters
# First line (state 1) needs to be a @parameter
if ($split_doc_state == 1 && /$doc_split_sect/o) {
$section = $1;
$contents = $2;
if ($contents ne "") {
while ((substr($contents, 0, 1) eq " ") ||
substr($contents, 0, 1) eq "\t") {
$contents = substr($contents, 1);
}
$contents .= "\n";
}
$split_doc_state = 2;
# Documentation block end */
} elsif (/$doc_split_end/) {
if (($contents ne "") && ($contents ne "\n")) {
dump_section($file, $section, xml_escape($contents));
$section = $section_default;
$contents = "";
}
$state = 3;
$split_doc_state = 0;
# Regular text
} elsif (/$doc_content/) {
if ($split_doc_state == 2) {
$contents .= $1 . "\n";
} elsif ($split_doc_state == 1) {
$split_doc_state = 4;
print STDERR "Warning(${file}:$.): ";
print STDERR "Incorrect use of kernel-doc format: $_";
++$warnings;
}
}
} elsif ($state == 3) { # scanning for function '{' (end of prototype)
if ($decl_type eq 'function') {
if (/$doc_split_start/) {
$state = 5;
$split_doc_state = 1;
} elsif ($decl_type eq 'function') {
process_state3_function($_, $file);
} else {
process_state3_type($_, $file);