[thirdparty/kernel/linux.git] / scripts / get_abi.pl

#!/usr/bin/perl

use strict;
use Pod::Usage;
use Getopt::Long;
use File::Find;
use Fcntl ':mode';

my $help;
my $man;
my $debug;
my $prefix="Documentation/ABI";

GetOptions(
	"debug|d+" => \$debug,
	"dir=s" => \$prefix,
	'help|?' => \$help,
	man => \$man
) or pod2usage(2);

pod2usage(1) if $help;
pod2usage(-exitstatus => 0, -verbose => 2) if $man;

pod2usage(2) if (scalar @ARGV < 1 || @ARGV > 2);

my ($cmd, $arg) = @ARGV;

pod2usage(2) if ($cmd ne "search" && $cmd ne "rest");
pod2usage(2) if ($cmd eq "search" && !$arg);

require Data::Dumper if ($debug);

my %data;

#
# Displays an error message, printing file name and line
#
sub parse_error($$$$) {
	my ($file, $ln, $msg, $data) = @_;

	print STDERR "file $file#$ln: $msg at\n\t$data";
}

#
# Parse an ABI file, storing its contents at %data
#
sub parse_abi {
	my $file = $File::Find::name;

	my $mode = (stat($file))[2];
	return if ($mode & S_IFDIR);
	return if ($file =~ m,/README,);

	my $name = $file;
	$name =~ s,.*/,,;

	my $nametag = "File $name";
	$data{$nametag}->{what} = "File $name";
	$data{$nametag}->{type} = "File";
	$data{$nametag}->{file} = $name;
	$data{$nametag}->{filepath} = $file;
	$data{$nametag}->{is_file} = 1;

	my $type = $file;
	$type =~ s,.*/(.*)/.*,$1,;

	my $what;
	my $new_what;
	my $tag;
	my $ln;
	my $xrefs;
	my $space;
	my @labels;
	my $label;

	print STDERR "Opening $file\n" if ($debug > 1);
	open IN, $file;
	while(<IN>) {
		$ln++;
		if (m/^(\S+)(:\s*)(.*)/i) {
			my $new_tag = lc($1);
			my $sep = $2;
			my $content = $3;

			if (!($new_tag =~ m/(what|date|kernelversion|contact|description|users)/)) {
				if ($tag eq "description") {
					# New "tag" is actually part of
					# description. Don't consider it a tag
					$new_tag = "";
				} else {
					parse_error($file, $ln, "tag '$tag' is invalid", $_);
				}
			}

			if ($new_tag =~ m/what/) {
				$space = "";
				if ($tag =~ m/what/) {
					$what .= ", " . $content;
				} else {
					parse_error($file, $ln, "What '$what' doesn't have a description", "") if ($what && !$data{$what}->{description});

					$what = $content;
					$label = $content;
					$new_what = 1;
				}
				push @labels, [($content, $label)];
				$tag = $new_tag;

				push @{$data{$nametag}->{xrefs}}, [($content, $label)] if ($data{$nametag}->{what});
				next;
			}

			if ($new_tag) {
				$tag = $new_tag;

				if ($new_what) {
					@{$data{$what}->{label}} = @labels if ($data{$nametag}->{what});
					@labels = ();
					$label = "";
					$new_what = 0;

					$data{$what}->{type} = $type;
					$data{$what}->{file} = $name;
					$data{$what}->{filepath} = $file;
					print STDERR "\twhat: $what\n" if ($debug > 1);
				}

				if (!$what) {
					parse_error($file, $ln, "'What:' should come first:", $_);
					next;
				}
				if ($tag eq "description") {
					next if ($content =~ m/^\s*$/);
					if ($content =~ m/^(\s*)(.*)/) {
						my $new_content = $2;
						$space = $new_tag . $sep . $1;
						while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
						$space =~ s/./ /g;
						$data{$what}->{$tag} .= "$new_content\n";
					}
				} else {
					$data{$what}->{$tag} = $content;
				}
				next;
			}
		}

		# Store any contents before tags at the database
		if (!$tag && $data{$nametag}->{what}) {
			$data{$nametag}->{description} .= $_;
			next;
		}

		if ($tag eq "description") {
			if (!$data{$what}->{description}) {
				next if (m/^\s*\n/);
				if (m/^(\s*)(.*)/) {
					$space = $1;
					while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
					$data{$what}->{$tag} .= "$2\n";
				}
			} else {
				my $content = $_;
				if (m/^\s*\n/) {
					$data{$what}->{$tag} .= $content;
					next;
				}

				while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
				$space = "" if (!($content =~ s/^($space)//));

				# Compress spaces with tabs
				$content =~ s<^ {8}> <\t>;
				$content =~ s<^ {1,7}\t> <\t>;
				$content =~ s< {1,7}\t> <\t>;
				$data{$what}->{$tag} .= $content;
			}
			next;
		}
		if (m/^\s*(.*)/) {
			$data{$what}->{$tag} .= "\n$1";
			$data{$what}->{$tag} =~ s/\n+$//;
			next;
		}

		# Everything else is error
		parse_error($file, $ln, "Unexpected line:", $_);
	}
	$data{$nametag}->{description} =~ s/^\n+//;
	close IN;
}

#
# Outputs the book on ReST format
#

sub output_rest {
	foreach my $what (sort {
				($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") ||
				$a cmp $b
			       } keys %data) {
		my $type = $data{$what}->{type};
		my $file = $data{$what}->{file};
		my $filepath = $data{$what}->{filepath};

		my $w = $what;
		$w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;


		foreach my $p (@{$data{$what}->{label}}) {
			my ($content, $label) = @{$p};
			$label = "abi_" . $label . " ";
			$label =~ tr/A-Z/a-z/;

			# Convert special chars to "_"
			$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
			$label =~ s,_+,_,g;
			$label =~ s,_$,,;

			$data{$what}->{label} .= $label;

			printf ".. _%s:\n\n", $label;

			# only one label is enough
			last;
		}


		$filepath =~ s,.*/(.*/.*),\1,;;
		$filepath =~ s,[/\-],_,g;;
		my $fileref = "abi_file_".$filepath;

		if ($type eq "File") {
			my $bar = $w;
			$bar =~ s/./-/g;

			print ".. _$fileref:\n\n";
			print "$w\n$bar\n\n";
		} else {
			my @names = split /\s*,\s*/,$w;

			my $len = 0;

			foreach my $name (@names) {
				$len = length($name) if (length($name) > $len);
			}

			print "What:\n\n";

			print "+-" . "-" x $len . "-+\n";
			foreach my $name (@names) {
				printf "| %s", $name . " " x ($len - length($name)) . " |\n";
				print "+-" . "-" x $len . "-+\n";
			}
			print "\n";
		}

		print "Defined on file :ref:`$file <$fileref>`\n\n" if ($type ne "File");

		my $desc = $data{$what}->{description};
		$desc =~ s/^\s+//;

		# Remove title markups from the description, as they won't work
		$desc =~ s/\n[\-\*\=\^\~]+\n/\n/g;

		if (!($desc =~ /^\s*$/)) {
			if ($desc =~ m/\:\n/ || $desc =~ m/\n[\t ]+/  || $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
				# put everything inside a code block
				$desc =~ s/\n/\n /g;

				print "::\n\n";
				print " $desc\n\n";
			} else {
				# Escape any special chars from description
				$desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;

				print "$desc\n\n";
			}
		} else {
			print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file});
		}

		if ($data{$what}->{xrefs}) {
			printf "Has the following ABI:\n\n";

			foreach my $p(@{$data{$what}->{xrefs}}) {
				my ($content, $label) = @{$p};
				$label = "abi_" . $label . " ";
				$label =~ tr/A-Z/a-z/;

				# Convert special chars to "_"
				$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
				$label =~ s,_+,_,g;
				$label =~ s,_$,,;

				# Escape special chars from content
				$content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;

				print "- :ref:`$content <$label>`\n\n";
			}
		}
	}
}

#
# Searches for ABI symbols
#
sub search_symbols {
	foreach my $what (sort keys %data) {
		next if (!($what =~ m/($arg)/));

		my $type = $data{$what}->{type};
		next if ($type eq "File");

		my $file = $data{$what}->{filepath};

		my $bar = $what;
		$bar =~ s/./-/g;

		print "\n$what\n$bar\n\n";

		my $kernelversion = $data{$what}->{kernelversion};
		my $contact = $data{$what}->{contact};
		my $users = $data{$what}->{users};
		my $date = $data{$what}->{date};
		my $desc = $data{$what}->{description};
		$kernelversion =~ s/^\s+//;
		$contact =~ s/^\s+//;
		$users =~ s/^\s+//;
		$users =~ s/\n//g;
		$date =~ s/^\s+//;
		$desc =~ s/^\s+//;

		printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
		printf "Date:\t\t\t%s\n", $date if ($date);
		printf "Contact:\t\t%s\n", $contact if ($contact);
		printf "Users:\t\t\t%s\n", $users if ($users);
		print "Defined on file:\t$file\n\n";
		print "Description:\n\n$desc";
	}
}


#
# Parses all ABI files located at $prefix dir
#
find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);

print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);

#
# Handles the command
#
if ($cmd eq "rest") {
	output_rest;
} else {
	search_symbols;
}


__END__

=head1 NAME

abi_book.pl - parse the Linux ABI files and produce a ReST book.

=head1 SYNOPSIS

B<abi_book.pl> [--debug] <COMAND> [<ARGUMENT>]

Where <COMMAND> can be:

=over 8

B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI

B<rest>   - output the ABI in ReST markup language

=back

=head1 OPTIONS

=over 8

=item B<--dir>

Changes the location of the ABI search. By default, it uses
the Documentation/ABI directory.

=item B<--debug>

Put the script in verbose mode, useful for debugging. Can be called multiple
times, to increase verbosity.

=item B<--help>

Prints a brief help message and exits.

=item B<--man>

Prints the manual page and exits.

=back

=head1 DESCRIPTION

Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
allowing to search for ABI symbols or to produce a ReST book containing
the Linux ABI documentation.

=head1 EXAMPLES

Search for all stable symbols with the word "usb":

=over 8

$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable

=back

Search for all symbols that match the regex expression "usb.*cap":

=over 8

$ scripts/get_abi.pl search usb.*cap

=back

Output all obsoleted symbols in ReST format

=over 8

$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete

=back

=head1 BUGS

Report bugs to Mauro Carvalho Chehab <mchehab@s-opensource.com>

=head1 COPYRIGHT

Copyright (c) 2016-2017 by Mauro Carvalho Chehab <mchehab@s-opensource.com>.

License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

=cut
Commit	Line	Data
bbc249f2 MCC	1	#!/usr/bin/perl
	2
	3	use strict;
	4	use Pod::Usage;
	5	use Getopt::Long;
	6	use File::Find;
	7	use Fcntl ':mode';
	8
	9	my $help;
	10	my $man;
	11	my $debug;
33e3e991	12	my $prefix="Documentation/ABI";
bbc249f2 MCC	13
	14	GetOptions(
	15	"debug\|d+" => \$debug,
33e3e991	16	"dir=s" => \$prefix,
bbc249f2 MCC	17	'help\|?' => \$help,
	18	man => \$man
	19	) or pod2usage(2);
	20
	21	pod2usage(1) if $help;
	22	pod2usage(-exitstatus => 0, -verbose => 2) if $man;
	23
33e3e991	24	pod2usage(2) if (scalar @ARGV < 1 \|\| @ARGV > 2);
bbc249f2	25
33e3e991 MCC	26	my ($cmd, $arg) = @ARGV;
	27
	28	pod2usage(2) if ($cmd ne "search" && $cmd ne "rest");
	29	pod2usage(2) if ($cmd eq "search" && !$arg);
bbc249f2 MCC	30
	31	require Data::Dumper if ($debug);
	32
	33	my %data;
	34
	35	#
	36	# Displays an error message, printing file name and line
	37	#
	38	sub parse_error($$$$) {
	39	my ($file, $ln, $msg, $data) = @_;
	40
	41	print STDERR "file $file#$ln: $msg at\n\t$data";
	42	}
	43
	44	#
	45	# Parse an ABI file, storing its contents at %data
	46	#
	47	sub parse_abi {
	48	my $file = $File::Find::name;
	49
	50	my $mode = (stat($file))[2];
	51	return if ($mode & S_IFDIR);
	52	return if ($file =~ m,/README,);
	53
	54	my $name = $file;
	55	$name =~ s,.*/,,;
	56
d0ebaf51 MCC	57	my $nametag = "File $name";
	58	$data{$nametag}->{what} = "File $name";
	59	$data{$nametag}->{type} = "File";
	60	$data{$nametag}->{file} = $name;
33e3e991	61	$data{$nametag}->{filepath} = $file;
d0ebaf51 MCC	62	$data{$nametag}->{is_file} = 1;
d0ebaf51 MCC	63
bbc249f2 MCC	64	my $type = $file;
	65	$type =~ s,./(.)/.*,$1,;
	66
	67	my $what;
	68	my $new_what;
	69	my $tag;
	70	my $ln;
6619c661	71	my $xrefs;
4e6a6234	72	my $space;
d0ebaf51 MCC	73	my @labels;
d0ebaf51 MCC	74	my $label;
bbc249f2 MCC	75
	76	print STDERR "Opening $file\n" if ($debug > 1);
	77	open IN, $file;
	78	while(<IN>) {
	79	$ln++;
4e6a6234	80	if (m/^(\S+)(:\s)(.)/i) {
bbc249f2	81	my $new_tag = lc($1);
4e6a6234 MCC	82	my $sep = $2;
4e6a6234 MCC	83	my $content = $3;
bbc249f2 MCC	84
	85	if (!($new_tag =~ m/(what\|date\|kernelversion\|contact\|description\|users)/)) {
	86	if ($tag eq "description") {
4e6a6234 MCC	87	# New "tag" is actually part of
	88	# description. Don't consider it a tag
	89	$new_tag = "";
bbc249f2 MCC	90	} else {
	91	parse_error($file, $ln, "tag '$tag' is invalid", $_);
	92	}
	93	}
	94
	95	if ($new_tag =~ m/what/) {
4e6a6234	96	$space = "";
bbc249f2 MCC	97	if ($tag =~ m/what/) {
	98	$what .= ", " . $content;
	99	} else {
4e6a6234 MCC	100	parse_error($file, $ln, "What '$what' doesn't have a description", "") if ($what && !$data{$what}->{description});
4e6a6234 MCC	101
bbc249f2	102	$what = $content;
d0ebaf51	103	$label = $content;
bbc249f2 MCC	104	$new_what = 1;
bbc249f2 MCC	105	}
d0ebaf51	106	push @labels, [($content, $label)];
bbc249f2	107	$tag = $new_tag;
6619c661	108
d0ebaf51	109	push @{$data{$nametag}->{xrefs}}, [($content, $label)] if ($data{$nametag}->{what});
bbc249f2 MCC	110	next;
	111	}
	112
4e6a6234 MCC	113	if ($new_tag) {
4e6a6234 MCC	114	$tag = $new_tag;
bbc249f2	115
4e6a6234	116	if ($new_what) {
d0ebaf51 MCC	117	@{$data{$what}->{label}} = @labels if ($data{$nametag}->{what});
	118	@labels = ();
	119	$label = "";
4e6a6234	120	$new_what = 0;
bbc249f2	121
4e6a6234 MCC	122	$data{$what}->{type} = $type;
4e6a6234 MCC	123	$data{$what}->{file} = $name;
33e3e991	124	$data{$what}->{filepath} = $file;
4e6a6234 MCC	125	print STDERR "\twhat: $what\n" if ($debug > 1);
4e6a6234 MCC	126	}
bbc249f2	127
4e6a6234 MCC	128	if (!$what) {
	129	parse_error($file, $ln, "'What:' should come first:", $_);
	130	next;
	131	}
	132	if ($tag eq "description") {
	133	next if ($content =~ m/^\s*$/);
	134	if ($content =~ m/^(\s)(.)/) {
	135	my $new_content = $2;
	136	$space = $new_tag . $sep . $1;
	137	while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
	138	$space =~ s/./ /g;
	139	$data{$what}->{$tag} .= "$new_content\n";
	140	}
	141	} else {
	142	$data{$what}->{$tag} = $content;
	143	}
bbc249f2 MCC	144	next;
bbc249f2 MCC	145	}
bbc249f2 MCC	146	}
bbc249f2 MCC	147
4e6a6234	148	# Store any contents before tags at the database
d0ebaf51 MCC	149	if (!$tag && $data{$nametag}->{what}) {
d0ebaf51 MCC	150	$data{$nametag}->{description} .= $_;
6619c661 MCC	151	next;
6619c661 MCC	152	}
bbc249f2	153
4e6a6234 MCC	154	if ($tag eq "description") {
	155	if (!$data{$what}->{description}) {
	156	next if (m/^\s*\n/);
	157	if (m/^(\s)(.)/) {
	158	$space = $1;
	159	while ($space =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
	160	$data{$what}->{$tag} .= "$2\n";
	161	}
	162	} else {
	163	my $content = $_;
	164	if (m/^\s*\n/) {
	165	$data{$what}->{$tag} .= $content;
	166	next;
	167	}
	168
	169	while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
	170	$space = "" if (!($content =~ s/^($space)//));
	171
	172	# Compress spaces with tabs
	173	$content =~ s<^ {8}> <\t>;
	174	$content =~ s<^ {1,7}\t> <\t>;
	175	$content =~ s< {1,7}\t> <\t>;
	176	$data{$what}->{$tag} .= $content;
	177	}
	178	next;
	179	}
bbc249f2 MCC	180	if (m/^\s(.)/) {
	181	$data{$what}->{$tag} .= "\n$1";
	182	$data{$what}->{$tag} =~ s/\n+$//;
	183	next;
	184	}
	185
	186	# Everything else is error
	187	parse_error($file, $ln, "Unexpected line:", $_);
	188	}
d0ebaf51	189	$data{$nametag}->{description} =~ s/^\n+//;
bbc249f2 MCC	190	close IN;
	191	}
	192
33e3e991 MCC	193	#
	194	# Outputs the book on ReST format
	195	#
45f96517	196
bbc249f2	197	sub output_rest {
45f96517 MCC	198	foreach my $what (sort {
	199	($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") \|\|
	200	$a cmp $b
	201	} keys %data) {
bbc249f2 MCC	202	my $type = $data{$what}->{type};
bbc249f2 MCC	203	my $file = $data{$what}->{file};
45f96517	204	my $filepath = $data{$what}->{filepath};
bbc249f2 MCC	205
	206	my $w = $what;
	207	$w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;
	208
4e6a6234	209
d0ebaf51 MCC	210	foreach my $p (@{$data{$what}->{label}}) {
	211	my ($content, $label) = @{$p};
	212	$label = "abi_" . $label . " ";
	213	$label =~ tr/A-Z/a-z/;
	214
	215	# Convert special chars to "_"
	216	$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
	217	$label =~ s,_+,_,g;
	218	$label =~ s,_$,,;
	219
	220	$data{$what}->{label} .= $label;
	221
	222	printf ".. _%s:\n\n", $label;
	223
	224	# only one label is enough
	225	last;
6619c661 MCC	226	}
6619c661 MCC	227
6619c661	228
45f96517 MCC	229	$filepath =~ s,./(./.*),\1,;;
	230	$filepath =~ s,[/\-],_,g;;
	231	my $fileref = "abi_file_".$filepath;
	232
	233	if ($type eq "File") {
	234	my $bar = $w;
	235	$bar =~ s/./-/g;
	236
	237	print ".. _$fileref:\n\n";
	238	print "$w\n$bar\n\n";
	239	} else {
	240	my @names = split /\s,\s/,$w;
	241
	242	my $len = 0;
	243
	244	foreach my $name (@names) {
	245	$len = length($name) if (length($name) > $len);
	246	}
	247
	248	print "What:\n\n";
	249
	250	print "+-" . "-" x $len . "-+\n";
	251	foreach my $name (@names) {
	252	printf "\| %s", $name . " " x ($len - length($name)) . " \|\n";
	253	print "+-" . "-" x $len . "-+\n";
	254	}
	255	print "\n";
	256	}
	257
	258	print "Defined on file :ref:`$file <$fileref>`\n\n" if ($type ne "File");
bbc249f2 MCC	259
	260	my $desc = $data{$what}->{description};
	261	$desc =~ s/^\s+//;
	262
	263	# Remove title markups from the description, as they won't work
	264	$desc =~ s/\n[\-\*\=\^\~]+\n/\n/g;
	265
4e6a6234 MCC	266	if (!($desc =~ /^\s*$/)) {
	267	if ($desc =~ m/\:\n/ \|\| $desc =~ m/\n[\t ]+/ \|\| $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
	268	# put everything inside a code block
	269	$desc =~ s/\n/\n /g;
bbc249f2	270
4e6a6234 MCC	271	print "::\n\n";
	272	print " $desc\n\n";
	273	} else {
	274	# Escape any special chars from description
	275	$desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;
bbc249f2	276
4e6a6234 MCC	277	print "$desc\n\n";
4e6a6234 MCC	278	}
bbc249f2	279	} else {
d0ebaf51	280	print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file});
bbc249f2	281	}
6619c661	282
d0ebaf51 MCC	283	if ($data{$what}->{xrefs}) {
	284	printf "Has the following ABI:\n\n";
	285
	286	foreach my $p(@{$data{$what}->{xrefs}}) {
	287	my ($content, $label) = @{$p};
	288	$label = "abi_" . $label . " ";
	289	$label =~ tr/A-Z/a-z/;
	290
	291	# Convert special chars to "_"
	292	$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
	293	$label =~ s,_+,_,g;
	294	$label =~ s,_$,,;
	295
	296	# Escape special chars from content
	297	$content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;
	298
	299	print "- :ref:`$content <$label>`\n\n";
	300	}
	301	}
bbc249f2 MCC	302	}
	303	}
	304
33e3e991 MCC	305	#
	306	# Searches for ABI symbols
	307	#
	308	sub search_symbols {
	309	foreach my $what (sort keys %data) {
	310	next if (!($what =~ m/($arg)/));
	311
	312	my $type = $data{$what}->{type};
	313	next if ($type eq "File");
	314
	315	my $file = $data{$what}->{filepath};
	316
	317	my $bar = $what;
	318	$bar =~ s/./-/g;
	319
	320	print "\n$what\n$bar\n\n";
	321
	322	my $kernelversion = $data{$what}->{kernelversion};
	323	my $contact = $data{$what}->{contact};
	324	my $users = $data{$what}->{users};
	325	my $date = $data{$what}->{date};
	326	my $desc = $data{$what}->{description};
	327	$kernelversion =~ s/^\s+//;
	328	$contact =~ s/^\s+//;
	329	$users =~ s/^\s+//;
	330	$users =~ s/\n//g;
	331	$date =~ s/^\s+//;
	332	$desc =~ s/^\s+//;
	333
	334	printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
	335	printf "Date:\t\t\t%s\n", $date if ($date);
	336	printf "Contact:\t\t%s\n", $contact if ($contact);
	337	printf "Users:\t\t\t%s\n", $users if ($users);
	338	print "Defined on file:\t$file\n\n";
	339	print "Description:\n\n$desc";
	340	}
	341	}
	342
	343
bbc249f2 MCC	344	#
	345	# Parses all ABI files located at $prefix dir
	346	#
	347	find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
	348
	349	print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
	350
	351	#
33e3e991	352	# Handles the command
bbc249f2	353	#
33e3e991 MCC	354	if ($cmd eq "rest") {
	355	output_rest;
	356	} else {
	357	search_symbols;
	358	}
bbc249f2 MCC	359
	360
	361	__END__
	362
	363	=head1 NAME
	364
	365	abi_book.pl - parse the Linux ABI files and produce a ReST book.
	366
	367	=head1 SYNOPSIS
	368
33e3e991 MCC	369	B<abi_book.pl> [--debug] <COMAND> [<ARGUMENT>]
	370
	371	Where <COMMAND> can be:
	372
	373	=over 8
	374
	375	B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI
	376
	377	B<rest> - output the ABI in ReST markup language
	378
	379	=back
bbc249f2 MCC	380
	381	=head1 OPTIONS
	382
	383	=over 8
	384
33e3e991 MCC	385	=item B<--dir>
	386
	387	Changes the location of the ABI search. By default, it uses
	388	the Documentation/ABI directory.
	389
bbc249f2 MCC	390	=item B<--debug>
	391
	392	Put the script in verbose mode, useful for debugging. Can be called multiple
	393	times, to increase verbosity.
	394
	395	=item B<--help>
	396
	397	Prints a brief help message and exits.
	398
	399	=item B<--man>
	400
	401	Prints the manual page and exits.
	402
	403	=back
	404
	405	=head1 DESCRIPTION
	406
33e3e991 MCC	407	Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
	408	allowing to search for ABI symbols or to produce a ReST book containing
	409	the Linux ABI documentation.
	410
	411	=head1 EXAMPLES
	412
	413	Search for all stable symbols with the word "usb":
	414
	415	=over 8
	416
	417	$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable
	418
	419	=back
	420
	421	Search for all symbols that match the regex expression "usb.*cap":
	422
	423	=over 8
	424
	425	$ scripts/get_abi.pl search usb.*cap
	426
	427	=back
	428
	429	Output all obsoleted symbols in ReST format
	430
	431	=over 8
	432
	433	$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
	434
	435	=back
bbc249f2 MCC	436
	437	=head1 BUGS
	438
	439	Report bugs to Mauro Carvalho Chehab <mchehab@s-opensource.com>
	440
	441	=head1 COPYRIGHT
	442
33e3e991	443	Copyright (c) 2016-2017 by Mauro Carvalho Chehab <mchehab@s-opensource.com>.
bbc249f2 MCC	444
	445	License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
	446
	447	This is free software: you are free to change and redistribute it.
	448	There is NO WARRANTY, to the extent permitted by law.
	449
	450	=cut