There are several places within the Kernel tree with nested
structs/unions, like this one:
struct ingenic_cgu_clk_info {
const char *name;
enum {
CGU_CLK_NONE = 0,
CGU_CLK_EXT = BIT(0),
CGU_CLK_PLL = BIT(1),
CGU_CLK_GATE = BIT(2),
CGU_CLK_MUX = BIT(3),
CGU_CLK_MUX_GLITCHFREE = BIT(4),
CGU_CLK_DIV = BIT(5),
CGU_CLK_FIXDIV = BIT(6),
CGU_CLK_CUSTOM = BIT(7),
} type;
int parents[4];
union {
struct ingenic_cgu_pll_info pll;
struct {
struct ingenic_cgu_gate_info gate;
struct ingenic_cgu_mux_info mux;
struct ingenic_cgu_div_info div;
struct ingenic_cgu_fixdiv_info fixdiv;
};
struct ingenic_cgu_custom_info custom;
};
};
Currently, such struct is documented as:
**Definition**
::
struct ingenic_cgu_clk_info {
const char * name;
};
**Members**
``name``
name of the clock
With is obvioulsy wrong. It also generates an error:
drivers/clk/ingenic/cgu.h:169: warning: No description found for parameter 'enum'
However, there's nothing wrong with this kernel-doc markup: everything
is documented there.
It makes sense to document all fields there. So, add a
way for the core to parse those structs.
With this patch, all documented fields will properly generate
documentation.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
---
Jon,
Please let me know what you think about this approach. IMHO, it is a way
better than what we do right now. This is more a proof of concept, as the
patch is not complete.
With it, we can now document both anonymous and named unions/structs.
For named structs, the name of the fields should be in the format:
foo.bar
What's missing on this PoC:
1) I didn't check if @foo.bar: would work, though. Probably the parser
for it should be added to allow this new syntax.
2) I only changed the ReST output to preserve the struct format with
nested fields.
For (2), I'm thinking is we should still have all those output formats for
kernel-doc. IMHO, I would keep just RST (and perhaps man - while we don't
have a "make man" targed working.
Depending on your comments, I'll proceed addressing (1) and (2)
and doing more tests with it.
scripts/kernel-doc | 83 +++++++++++++++++++++++++++++++++++-------------------
1 file changed, 54 insertions(+), 29 deletions(-)
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 9d3eafea58f0..5ca81b879088 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -2035,29 +2035,9 @@ sub output_struct_rst(%) {
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";
+ my $declaration = $args{'definition'};
+ $declaration =~ s/\t/ /g;
+ print " " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration };\n\n";
print "**Members**\n\n";
$lineprefix = " ";
@@ -2168,20 +2148,15 @@ sub dump_struct($$) {
my $nested;
if ($x =~ /(struct|union)\s+(\w+)\s*{(.*)}/) {
- #my $decl_type = $1;
+ my $decl_type = $1;
$declaration_name = $2;
my $members = $3;
- # ignore embedded structs or unions
- $members =~ s/({.*})//g;
- $nested = $1;
-
# ignore members marked private:
$members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
$members =~ s/\/\*\s*private:.*//gosi;
# strip comments:
$members =~ s/\/\*.*?\*\///gos;
- $nested =~ s/\/\*.*?\*\///gos;
# strip kmemcheck_bitfield_{begin,end}.*;
$members =~ s/kmemcheck_bitfield_.*?;//gos;
# strip attributes
@@ -2193,13 +2168,63 @@ sub dump_struct($$) {
# replace DECLARE_HASHTABLE
$members =~ s/DECLARE_HASHTABLE\s*\(([^,)]+), ([^,)]+)\)/unsigned long $1\[1 << (($2) - 1)\]/gos;
+ my $declaration = $members;
+
+ # Split nested struct/union elements as newer ones
+ my $cont = 1;
+ while ($cont) {
+ $cont = 0;
+ while ($members =~ m/(struct|union)([^{};]+){([^{}]*)}([^{}\;]*)\;/) {
+ my $newmember = "$1 $4;";
+ my $id = $4;
+ my $content = $3;
+ $id =~ s/[:\[].*//;
+ foreach my $arg (split /;/, $content) {
+ next if ($arg =~ m/^\s*$/);
+ my $type = $arg;
+ my $name = $arg;
+ $type =~ s/\s\S+$//;
+ $name =~ s/.*\s//;
+ next if (($name =~ m/^\s*$/));
+ if ($id =~ m/^\s*$/) {
+ # anonymous struct/union
+ $newmember .= "$type $name;";
+ } else {
+ $newmember .= "$type $id.$name;";
+ }
+ }
+ $members =~ s/(struct|union)([^{};]+){([^{}]*)}([^{}\;]*)\;/$newmember/;
+ $cont = 1;
+ };
+ };
+
+ # Ignore other nested elements, like enums
+ $members =~ s/({[^\{\}]*})//g;
+ $nested = $decl_type;
+ $nested =~ s/\/\*.*?\*\///gos;
+
create_parameterlist($members, ';', $file);
check_sections($file, $declaration_name, "struct", $sectcheck, $struct_actual, $nested);
+ # Adjust declaration for better display
+ $declaration =~ s/([{,;])/$1\n/g;
+ $declaration =~ s/}\s+;/};/g;
+ my @def_args = split /\n/, $declaration;
+ my $level = 2;
+ $declaration = "";
+ foreach my $clause (@def_args) {
+ $clause =~ s/^\s+//;
+ $clause =~ s/\s+$//;
+ $clause =~ s/\s+/ /;
+ $level-- if ($clause =~ m/}/ && $level > 2);
+ $declaration .= "\t" x $level . $clause . "\n" if ($clause);
+ $level++ if ($clause =~ m/{/);
+ }
output_declaration($declaration_name,
'struct',
{'struct' => $declaration_name,
'module' => $modulename,
+ 'definition' => $declaration,
'parameterlist' => \@parameterlist,
'parameterdescs' => \%parameterdescs,
'parametertypes' => \%parametertypes,
--
2.13.5
