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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2017-12-18 10:30:17 -0200
committerJonathan Corbet <corbet@lwn.net>2017-12-21 13:41:47 -0700
commit84ce5b987783d362ee4e737b653d6e2feacfa40c (patch)
tree2fcc939ad7626ef6e0fdfeac68b07cb513ef1e02 /scripts
parent7c0d7e87a16fe615e7913a3d56ce7bd26104ef0b (diff)
downloadlinux-84ce5b987783d362ee4e737b653d6e2feacfa40c.tar.bz2
scripts: kernel-doc: improve nested logic to handle multiple identifiers
It is possible to use nested structs like: struct { struct { void *arg1; } st1, st2, *st3, st4; }; Handling it requires to split each parameter. Change the logic to allow such definitions. In order to test the new nested logic, the following file was used to test <code> struct foo { int a; }; /* Just to avoid errors if compiled */ /** * struct my_struct - a struct with nested unions and structs * @arg1: first argument of anonymous union/anonymous struct * @arg2: second argument of anonymous union/anonymous struct * @arg1b: first argument of anonymous union/anonymous struct * @arg2b: second argument of anonymous union/anonymous struct * @arg3: third argument of anonymous union/anonymous struct * @arg4: fourth argument of anonymous union/anonymous struct * @bar.st1.arg1: first argument of struct st1 on union bar * @bar.st1.arg2: second argument of struct st1 on union bar * @bar.st1.bar1: bar1 at st1 * @bar.st1.bar2: bar2 at st1 * @bar.st2.arg1: first argument of struct st2 on union bar * @bar.st2.arg2: second argument of struct st2 on union bar * @bar.st3.arg2: second argument of struct st3 on union bar * @f1: nested function on anonimous union/struct * @bar.st2.f2: nested function on named union/struct */ struct my_struct { /* Anonymous union/struct*/ union { struct { char arg1 : 1; char arg2 : 3; }; struct { int arg1b; int arg2b; }; struct { void *arg3; int arg4; int (*f1)(char foo, int bar); }; }; union { struct { int arg1; int arg2; struct foo bar1, *bar2; } st1; /* bar.st1 is undocumented, cause a warning */ struct { void *arg1; /* bar.st3.arg1 is undocumented, cause a warning */ int arg2; int (*f2)(char foo, int bar); /* bar.st3.fn2 is undocumented, cause a warning */ } st2, st3, *st4; int (*f3)(char foo, int bar); /* f3 is undocumented, cause a warning */ } bar; /* bar is undocumented, cause a warning */ /* private: */ int undoc_privat; /* is undocumented but private, no warning */ /* public: */ int undoc_public; /* is undocumented, cause a warning */ }; </code> It produces the following warnings, as expected: test2.h:57: warning: Function parameter or member 'bar' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st1' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st2' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st3' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st3.arg1' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st3.f2' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st4' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st4.arg1' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st4.arg2' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.st4.f2' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'bar.f3' not described in 'my_struct' test2.h:57: warning: Function parameter or member 'undoc_public' not described in 'my_struct' Suggested-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/kernel-doc69
1 files changed, 44 insertions, 25 deletions
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index 5d03c9086323..0bda21d9d3f2 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -1030,15 +1030,16 @@ sub dump_struct($$) {
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 = $3;
+ while ($members =~ m/(struct|union)([^\{\};]+)\{([^\{\}]*)\}([^\{\}\;]*)\;/) {
+ my $newmember;
+ my $maintype = $1;
+ my $ids = $4;
+ my $content = $3;
+ foreach my $id(split /,/, $ids) {
+ $newmember .= "$maintype $id; ";
+
$id =~ s/[:\[].*//;
- $id =~ s/^\*+//;
+ $id =~ s/^\s*\**(\S+)\s*/$1/;
foreach my $arg (split /;/, $content) {
next if ($arg =~ m/^\s*$/);
if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
@@ -1049,30 +1050,48 @@ sub dump_struct($$) {
next if (!$name);
if ($id =~ m/^\s*$/) {
# anonymous struct/union
- $newmember .= "$type$name$extra;";
+ $newmember .= "$type$name$extra; ";
} else {
- $newmember .= "$type$id.$name$extra;";
+ $newmember .= "$type$id.$name$extra; ";
}
} else {
- my $type = $arg;
- my $name = $arg;
- $type =~ s/\s\S+$//;
- $name =~ s/.*\s+//;
- $name =~ s/[:\[].*//;
- $name =~ s/^\*+//;
- next if (($name =~ m/^\s*$/));
- if ($id =~ m/^\s*$/) {
- # anonymous struct/union
- $newmember .= "$type $name;";
+ my $type;
+ my $names;
+ $arg =~ s/^\s+//;
+ $arg =~ s/\s+$//;
+ # Handle bitmaps
+ $arg =~ s/:\s*\d+\s*//g;
+ # Handle arrays
+ $arg =~ s/\[\S+\]//g;
+ # The type may have multiple words,
+ # and multiple IDs can be defined, like:
+ # const struct foo, *bar, foobar
+ # So, we remove spaces when parsing the
+ # names, in order to match just names
+ # and commas for the names
+ $arg =~ s/\s*,\s*/,/g;
+ if ($arg =~ m/(.*)\s+([\S+,]+)/) {
+ $type = $1;
+ $names = $2;
} else {
- $newmember .= "$type $id.$name;";
+ $newmember .= "$arg; ";
+ next;
+ }
+ foreach my $name (split /,/, $names) {
+ $name =~ s/^\s*\**(\S+)\s*/$1/;
+ next if (($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;
- };
- };
+ }
+ $members =~ s/(struct|union)([^\{\};]+)\{([^\{\}]*)}([^\{\}\;]*)\;/$newmember/;
+ }
# Ignore other nested elements, like enums
$members =~ s/({[^\{\}]*})//g;