mirror of https://gitee.com/openkylin/linux.git
scripts: kernel-doc: parse next structs/unions
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@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab
Jonathan Corbet
parent
7c9aa0157e
commit
8ad7216316
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@ -281,6 +281,52 @@ comment block.
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The kernel-doc data structure comments describe each member of the structure,
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in order, with the member descriptions.
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Nested structs/unions
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~~~~~~~~~~~~~~~~~~~~~
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It is possible to document nested structs unions, like::
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/**
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* struct nested_foobar - a struct with nested unions and structs
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* @arg1: - first argument of anonymous union/anonymous struct
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* @arg2: - second argument of anonymous union/anonymous struct
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* @arg3: - third argument of anonymous union/anonymous struct
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* @arg4: - fourth argument of anonymous union/anonymous struct
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* @bar.st1.arg1 - first argument of struct st1 on union bar
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* @bar.st1.arg2 - second argument of struct st1 on union bar
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* @bar.st2.arg1 - first argument of struct st2 on union bar
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* @bar.st2.arg2 - second argument of struct st2 on union bar
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struct nested_foobar {
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/* Anonymous union/struct*/
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union {
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struct {
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int arg1;
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int arg2;
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}
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struct {
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void *arg3;
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int arg4;
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}
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}
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union {
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struct {
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int arg1;
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int arg2;
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} st1;
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struct {
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void *arg1;
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int arg2;
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} st2;
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} bar;
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};
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.. note::
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#) When documenting nested structs or unions, if the struct/union ``foo``
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is named, the argument ``bar`` inside it should be documented as
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``@foo.bar:``
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#) When the nested struct/union is anonymous, the argument ``bar`` on it
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should be documented as ``@bar:``
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Typedef documentation
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---------------------
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@ -211,7 +211,7 @@ my $anon_struct_union = 0;
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my $type_constant = '\b``([^\`]+)``\b';
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my $type_constant2 = '\%([-_\w]+)';
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my $type_func = '(\w+)\(\)';
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my $type_param = '\@(\w+(\.\.\.)?)';
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my $type_param = '\@(\w*(\.\w+)*(\.\.\.)?)';
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my $type_fp_param = '\@(\w+)\(\)'; # Special RST handling for func ptr params
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my $type_env = '(\$\w+)';
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my $type_enum = '\&(enum\s*([_\w]+))';
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@ -670,32 +670,12 @@ sub output_struct_man(%) {
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print ".SH NAME\n";
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print $args{'type'} . " " . $args{'struct'} . " \\- " . $args{'purpose'} . "\n";
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my $declaration = $args{'definition'};
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$declaration =~ s/\t/ /g;
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$declaration =~ s/\n/"\n.br\n.BI \"/g;
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print ".SH SYNOPSIS\n";
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print $args{'type'} . " " . $args{'struct'} . " {\n.br\n";
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foreach my $parameter (@{$args{'parameterlist'}}) {
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if ($parameter =~ /^#/) {
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print ".BI \"$parameter\"\n.br\n";
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next;
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}
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my $parameter_name = $parameter;
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$parameter_name =~ s/\[.*//;
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($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
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$type = $args{'parametertypes'}{$parameter};
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if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
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# pointer-to-function
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print ".BI \" " . $1 . "\" " . $parameter . " \") (" . $2 . ")" . "\"\n;\n";
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} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
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# bitfield
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print ".BI \" " . $1 . "\ \" " . $parameter . $2 . " \"" . "\"\n;\n";
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} else {
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$type =~ s/([^\*])$/$1 /;
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print ".BI \" " . $type . "\" " . $parameter . " \"" . "\"\n;\n";
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}
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print "\n.br\n";
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}
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print "};\n.br\n";
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print ".BI \"$declaration\n};\n.br\n\n";
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print ".SH Members\n";
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foreach $parameter (@{$args{'parameterlist'}}) {
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@ -933,29 +913,9 @@ sub output_struct_rst(%) {
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print "**Definition**\n\n";
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print "::\n\n";
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print " " . $args{'type'} . " " . $args{'struct'} . " {\n";
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foreach $parameter (@{$args{'parameterlist'}}) {
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if ($parameter =~ /^#/) {
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print " " . "$parameter\n";
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next;
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}
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my $parameter_name = $parameter;
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$parameter_name =~ s/\[.*//;
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($args{'parameterdescs'}{$parameter_name} ne $undescribed) || next;
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$type = $args{'parametertypes'}{$parameter};
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if ($type =~ m/([^\(]*\(\*)\s*\)\s*\(([^\)]*)\)/) {
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# pointer-to-function
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print " $1 $parameter) ($2);\n";
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} elsif ($type =~ m/^(.*?)\s*(:.*)/) {
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# bitfield
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print " $1 $parameter$2;\n";
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} else {
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print " " . $type . " " . $parameter . ";\n";
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}
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}
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print " };\n\n";
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my $declaration = $args{'definition'};
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$declaration =~ s/\t/ /g;
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print " " . $args{'type'} . " " . $args{'struct'} . " {\n$declaration };\n\n";
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print "**Members**\n\n";
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$lineprefix = " ";
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@ -1050,16 +1010,11 @@ sub dump_struct($$) {
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$declaration_name = $2;
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my $members = $3;
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# ignore embedded structs or unions
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$members =~ s/({.*})//g;
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$nested = $1;
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# ignore members marked private:
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$members =~ s/\/\*\s*private:.*?\/\*\s*public:.*?\*\///gosi;
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$members =~ s/\/\*\s*private:.*//gosi;
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# strip comments:
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$members =~ s/\/\*.*?\*\///gos;
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$nested =~ s/\/\*.*?\*\///gos;
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# strip attributes
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$members =~ s/__attribute__\s*\(\([a-z,_\*\s\(\)]*\)\)//i;
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$members =~ s/__aligned\s*\([^;]*\)//gos;
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@ -1073,13 +1028,73 @@ sub dump_struct($$) {
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# replace DECLARE_KFIFO_PTR
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$members =~ s/DECLARE_KFIFO_PTR\s*\(([^,)]+),\s*([^,)]+)\)/$2 \*$1/gos;
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my $declaration = $members;
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# Split nested struct/union elements as newer ones
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my $cont = 1;
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while ($cont) {
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$cont = 0;
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while ($members =~ m/(struct|union)([^{};]+){([^{}]*)}([^{}\;]*)\;/) {
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my $newmember = "$1 $4;";
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my $id = $4;
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my $content = $3;
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$id =~ s/[:\[].*//;
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$id =~ s/^\*+//;
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foreach my $arg (split /;/, $content) {
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next if ($arg =~ m/^\s*$/);
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my $type = $arg;
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my $name = $arg;
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$type =~ s/\s\S+$//;
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$name =~ s/.*\s//;
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$name =~ s/[:\[].*//;
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$name =~ s/^\*+//;
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next if (($name =~ m/^\s*$/));
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if ($id =~ m/^\s*$/) {
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# anonymous struct/union
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$newmember .= "$type $name;";
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} else {
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$newmember .= "$type $id.$name;";
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}
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}
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$members =~ s/(struct|union)([^{};]+){([^{}]*)}([^{}\;]*)\;/$newmember/;
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$cont = 1;
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};
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};
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# Ignore other nested elements, like enums
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$members =~ s/({[^\{\}]*})//g;
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$nested = $decl_type;
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$nested =~ s/\/\*.*?\*\///gos;
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create_parameterlist($members, ';', $file);
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check_sections($file, $declaration_name, $decl_type, $sectcheck, $struct_actual, $nested);
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# Adjust declaration for better display
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$declaration =~ s/([{;])/$1\n/g;
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$declaration =~ s/}\s+;/};/g;
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# Better handle inlined enums
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do {} while ($declaration =~ s/(enum\s+{[^}]+),([^\n])/$1,\n$2/);
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my @def_args = split /\n/, $declaration;
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my $level = 1;
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$declaration = "";
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foreach my $clause (@def_args) {
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$clause =~ s/^\s+//;
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$clause =~ s/\s+$//;
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$clause =~ s/\s+/ /;
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next if (!$clause);
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$level-- if ($clause =~ m/(})/ && $level > 1);
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if (!($clause =~ m/^\s*#/)) {
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$declaration .= "\t" x $level;
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}
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$declaration .= "\t" . $clause . "\n";
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$level++ if ($clause =~ m/({)/ && !($clause =~m/}/));
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}
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output_declaration($declaration_name,
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'struct',
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{'struct' => $declaration_name,
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'module' => $modulename,
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'definition' => $declaration,
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'parameterlist' => \@parameterlist,
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'parameterdescs' => \%parameterdescs,
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'parametertypes' => \%parametertypes,
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