[linux-block.git] / scripts / get_abi.pl

#!/usr/bin/perl
# SPDX-License-Identifier: GPL-2.0

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

my $help = 0;
my $man = 0;
my $debug = 0;
my $enable_lineno = 0;
my $prefix="Documentation/ABI";

#
# If true, assumes that the description is formatted with ReST
#
my $description_is_rst = 0;

GetOptions(
	"debug|d+" => \$debug,
	"enable-lineno" => \$enable_lineno,
	"rst-source!" => \$description_is_rst,
	"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" && $cmd ne "validate");
pod2usage(2) if ($cmd eq "search" && !$arg);

require Data::Dumper if ($debug);

my %data;
my %symbols;

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

			# Invalid, but it is a common mistake
			if ($new_tag eq "where") {
				parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", $_);
				$new_tag = "what";
			}

			if ($new_tag =~ m/what/) {
				$space = "";
				$content =~ s/[,.;]$//;

				push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);

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

						foreach my $w(split /, /, $what) {
							$symbols{$w}->{xref} = $what;
						};
					}

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

				push @{$data{$nametag}->{symbols}}, $content if ($data{$nametag}->{what});
				next;
			}

			if ($tag ne "" && $new_tag) {
				$tag = $new_tag;

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

					$data{$what}->{type} = $type;
					if (!defined($data{$what}->{file})) {
						$data{$what}->{file} = $name;
						$data{$what}->{filepath} = $file;
					} else {
						if ($name ne $data{$what}->{file}) {
							$data{$what}->{file} .= " " . $name;
							$data{$what}->{filepath} .= " " . $file;
						}
					}
					print STDERR "\twhat: $what\n" if ($debug > 1);
					$data{$what}->{line_no} = $ln;
				} else {
					$data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no}));
				}

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

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

			if (!defined($space)) {
				# Preserve initial spaces for the first line
				if ($content =~ m/^(\s*)(\S.*)$/) {
					$space = $1;
					$content = "$2\n";
				}
			} else {
				$space = "" if (!($content =~ s/^($space)//));
			}
			$data{$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+// if ($data{$nametag}->{description});
	if ($what) {
		parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});

		foreach my $w(split /, /,$what) {
			$symbols{$w}->{xref} = $what;
		};
	}
	close IN;
}

sub create_labels {
	my %labels;

	foreach my $what (keys %data) {
		next if ($data{$what}->{file} eq "File");

		foreach my $p (@{$data{$what}->{label_list}}) {
			my ($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;
			$label =~ s,_$,,;

			# Avoid duplicated labels
			while (defined($labels{$label})) {
			    my @chars = ("A".."Z", "a".."z");
			    $label .= $chars[rand @chars];
			}
			$labels{$label} = 1;

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

			# only one label is enough
			last;
		}
	}
}

#
# Outputs the book on ReST format
#

sub output_rest {
	create_labels();

	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 = split / /, $data{$what}->{file};
		my @filepath = split / /, $data{$what}->{filepath};

		if ($enable_lineno) {
			printf "#define LINENO %s%s#%s\n\n",
			       $prefix, $file[0],
			       $data{$what}->{line_no};
		}

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

		if ($type ne "File") {
			printf ".. _%s:\n\n", $data{$what}->{label};

			my @names = split /, /,$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";
		}

		for (my $i = 0; $i < scalar(@filepath); $i++) {
			my $path = $filepath[$i];
			my $f = $file[$i];

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

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

				print ".. _$fileref:\n\n";
				print "$w\n$bar\n\n";
			} else {
				print "Defined on file :ref:`$f <$fileref>`\n\n";
			}
		}

		my $desc = "";
		$desc = $data{$what}->{description} if (defined($data{$what}->{description}));
		$desc =~ s/\s+$/\n/;

		if (!($desc =~ /^\s*$/)) {
			if ($description_is_rst) {
				print "$desc\n\n";
			} else {
				$desc =~ s/^\s+//;

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

				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}->{symbols}) {
			printf "Has the following ABI:\n\n";

			foreach my $content(@{$data{$what}->{symbols}}) {
				my $label = $data{$symbols{$content}->{xref}}->{label};

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

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

		if (defined($data{$what}->{users})) {
			my $users = $data{$what}->{users};

			$users =~ s/\n/\n\t/g;
			printf "Users:\n\t%s\n\n", $users if ($users ne "");
		}

	}
}

#
# 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} if (defined($data{$what}->{kernelversion}));
		my $contact = $data{$what}->{contact} if (defined($data{$what}->{contact}));
		my $users = $data{$what}->{users} if (defined($data{$what}->{users}));
		my $date = $data{$what}->{date} if (defined($data{$what}->{date}));
		my $desc = $data{$what}->{description} if (defined($data{$what}->{description}));

		$kernelversion =~ s/^\s+// if ($kernelversion);
		$contact =~ s/^\s+// if ($contact);
		if ($users) {
			$users =~ s/^\s+//;
			$users =~ s/\n//g;
		}
		$date =~ s/^\s+// if ($date);
		$desc =~ s/^\s+// if ($desc);

		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(s):\t$file\n\n";
		print "Description:\n\n$desc";
	}
}

# Ensure that the prefix will always end with a slash
# While this is not needed for find, it makes the patch nicer
# with --enable-lineno
$prefix =~ s,/?$,/,;

#
# 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 ($cmd eq "search") {
	search_symbols;
} else {
	if ($cmd eq "rest") {
		output_rest;
	}

	# Warn about duplicated ABI entries
	foreach my $what(sort keys %symbols) {
		my @files = @{$symbols{$what}->{file}};

		next if (scalar(@files) == 1);

		printf STDERR "Warning: $what is defined %d times: @files\n",
		    scalar(@files);
	}
}

__END__

=head1 NAME

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

=head1 SYNOPSIS

B<abi_book.pl> [--debug] [--enable-lineno] [--man] [--help]
	       [--(no-)rst-source] [--dir=<dir>] <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

B<validate>              - validate the ABI contents

=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<--rst-source> and B<--no-rst-source>

The input file may be using ReST syntax or not. Those two options allow
selecting between a rst-compliant source ABI (--rst-source), or a
plain text that may be violating ReST spec, so it requres some escaping
logic (--no-rst-source).

=item B<--enable-lineno>

Enable output of #define LINENO lines.

=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+samsung@kernel.org>

=head1 COPYRIGHT

Copyright (c) 2016-2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.

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	1	#!/usr/bin/perl
ecb351f1	2	# SPDX-License-Identifier: GPL-2.0
bbc249f2 MCC	3
bbc249f2 MCC	4	use strict;
234948bf	5	use warnings;
bbc249f2 MCC	6	use Pod::Usage;
	7	use Getopt::Long;
	8	use File::Find;
	9	use Fcntl ':mode';
	10
234948bf MCC	11	my $help = 0;
	12	my $man = 0;
	13	my $debug = 0;
	14	my $enable_lineno = 0;
33e3e991	15	my $prefix="Documentation/ABI";
bbc249f2	16
11ce90a4 MCC	17	#
	18	# If true, assumes that the description is formatted with ReST
	19	#
	20	my $description_is_rst = 0;
	21
bbc249f2 MCC	22	GetOptions(
bbc249f2 MCC	23	"debug\|d+" => \$debug,
61439c4a	24	"enable-lineno" => \$enable_lineno,
11ce90a4	25	"rst-source!" => \$description_is_rst,
33e3e991	26	"dir=s" => \$prefix,
bbc249f2 MCC	27	'help\|?' => \$help,
	28	man => \$man
	29	) or pod2usage(2);
	30
	31	pod2usage(1) if $help;
	32	pod2usage(-exitstatus => 0, -verbose => 2) if $man;
	33
33e3e991	34	pod2usage(2) if (scalar @ARGV < 1 \|\| @ARGV > 2);
bbc249f2	35
33e3e991 MCC	36	my ($cmd, $arg) = @ARGV;
33e3e991 MCC	37
7ce7b89b	38	pod2usage(2) if ($cmd ne "search" && $cmd ne "rest" && $cmd ne "validate");
33e3e991	39	pod2usage(2) if ($cmd eq "search" && !$arg);
bbc249f2 MCC	40
	41	require Data::Dumper if ($debug);
	42
	43	my %data;
234948bf	44	my %symbols;
bbc249f2 MCC	45
	46	#
	47	# Displays an error message, printing file name and line
	48	#
	49	sub parse_error($$$$) {
	50	my ($file, $ln, $msg, $data) = @_;
	51
	52	print STDERR "file $file#$ln: $msg at\n\t$data";
	53	}
	54
	55	#
	56	# Parse an ABI file, storing its contents at %data
	57	#
	58	sub parse_abi {
	59	my $file = $File::Find::name;
	60
	61	my $mode = (stat($file))[2];
	62	return if ($mode & S_IFDIR);
	63	return if ($file =~ m,/README,);
	64
	65	my $name = $file;
	66	$name =~ s,.*/,,;
	67
d0ebaf51 MCC	68	my $nametag = "File $name";
	69	$data{$nametag}->{what} = "File $name";
	70	$data{$nametag}->{type} = "File";
	71	$data{$nametag}->{file} = $name;
33e3e991	72	$data{$nametag}->{filepath} = $file;
d0ebaf51	73	$data{$nametag}->{is_file} = 1;
61439c4a	74	$data{$nametag}->{line_no} = 1;
d0ebaf51	75
bbc249f2 MCC	76	my $type = $file;
	77	$type =~ s,./(.)/.*,$1,;
	78
	79	my $what;
	80	my $new_what;
234948bf	81	my $tag = "";
bbc249f2	82	my $ln;
6619c661	83	my $xrefs;
4e6a6234	84	my $space;
d0ebaf51	85	my @labels;
234948bf	86	my $label = "";
bbc249f2 MCC	87
	88	print STDERR "Opening $file\n" if ($debug > 1);
	89	open IN, $file;
	90	while(<IN>) {
	91	$ln++;
4e6a6234	92	if (m/^(\S+)(:\s)(.)/i) {
bbc249f2	93	my $new_tag = lc($1);
4e6a6234 MCC	94	my $sep = $2;
4e6a6234 MCC	95	my $content = $3;
bbc249f2	96
7ce7b89b	97	if (!($new_tag =~ m/(what\|where\|date\|kernelversion\|contact\|description\|users)/)) {
bbc249f2	98	if ($tag eq "description") {
4e6a6234 MCC	99	# New "tag" is actually part of
	100	# description. Don't consider it a tag
	101	$new_tag = "";
7d7ea8d2	102	} elsif ($tag ne "") {
bbc249f2 MCC	103	parse_error($file, $ln, "tag '$tag' is invalid", $_);
	104	}
	105	}
	106
2c0700e7 MCC	107	# Invalid, but it is a common mistake
	108	if ($new_tag eq "where") {
	109	parse_error($file, $ln, "tag 'Where' is invalid. Should be 'What:' instead", $_);
	110	$new_tag = "what";
	111	}
	112
bbc249f2	113	if ($new_tag =~ m/what/) {
4e6a6234	114	$space = "";
234948bf MCC	115	$content =~ s/[,.;]$//;
234948bf MCC	116
c7ba3334 MCC	117	push @{$symbols{$content}->{file}}, " $file:" . ($ln - 1);
c7ba3334 MCC	118
bbc249f2 MCC	119	if ($tag =~ m/what/) {
	120	$what .= ", " . $content;
	121	} else {
234948bf MCC	122	if ($what) {
	123	parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
	124
	125	foreach my $w(split /, /, $what) {
c7ba3334	126	$symbols{$w}->{xref} = $what;
234948bf MCC	127	};
234948bf MCC	128	}
4e6a6234	129
bbc249f2	130	$what = $content;
d0ebaf51	131	$label = $content;
bbc249f2 MCC	132	$new_what = 1;
bbc249f2 MCC	133	}
d0ebaf51	134	push @labels, [($content, $label)];
bbc249f2	135	$tag = $new_tag;
6619c661	136
234948bf	137	push @{$data{$nametag}->{symbols}}, $content if ($data{$nametag}->{what});
bbc249f2 MCC	138	next;
	139	}
	140
7d7ea8d2	141	if ($tag ne "" && $new_tag) {
4e6a6234	142	$tag = $new_tag;
bbc249f2	143
4e6a6234	144	if ($new_what) {
234948bf	145	@{$data{$what}->{label_list}} = @labels if ($data{$nametag}->{what});
d0ebaf51 MCC	146	@labels = ();
d0ebaf51 MCC	147	$label = "";
4e6a6234	148	$new_what = 0;
bbc249f2	149
4e6a6234	150	$data{$what}->{type} = $type;
c7ba3334 MCC	151	if (!defined($data{$what}->{file})) {
	152	$data{$what}->{file} = $name;
	153	$data{$what}->{filepath} = $file;
	154	} else {
	155	if ($name ne $data{$what}->{file}) {
	156	$data{$what}->{file} .= " " . $name;
	157	$data{$what}->{filepath} .= " " . $file;
	158	}
	159	}
4e6a6234	160	print STDERR "\twhat: $what\n" if ($debug > 1);
c7ba3334 MCC	161	$data{$what}->{line_no} = $ln;
	162	} else {
	163	$data{$what}->{line_no} = $ln if (!defined($data{$what}->{line_no}));
4e6a6234	164	}
bbc249f2	165
4e6a6234 MCC	166	if (!$what) {
	167	parse_error($file, $ln, "'What:' should come first:", $_);
	168	next;
	169	}
f82a8a74 MCC	170	if ($new_tag eq "description") {
f82a8a74 MCC	171	$sep =~ s,:, ,;
11ce90a4	172	$content = ' ' x length($new_tag) . $sep . $content;
f82a8a74 MCC	173	while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
	174	if ($content =~ m/^(\s)(\S.)$/) {
	175	# Preserve initial spaces for the first line
11ce90a4	176	$space = $1;
f82a8a74 MCC	177	$content = "$2\n";
	178	$data{$what}->{$tag} .= $content;
	179	} else {
	180	undef($space);
4e6a6234	181	}
e9bca891	182
4e6a6234 MCC	183	} else {
	184	$data{$what}->{$tag} = $content;
	185	}
bbc249f2 MCC	186	next;
bbc249f2 MCC	187	}
bbc249f2 MCC	188	}
bbc249f2 MCC	189
4e6a6234	190	# Store any contents before tags at the database
d0ebaf51 MCC	191	if (!$tag && $data{$nametag}->{what}) {
d0ebaf51 MCC	192	$data{$nametag}->{description} .= $_;
6619c661 MCC	193	next;
6619c661 MCC	194	}
bbc249f2	195
4e6a6234	196	if ($tag eq "description") {
e9bca891 MCC	197	my $content = $_;
e9bca891 MCC	198	while ($content =~ s/\t+/' ' x (length($&) * 8 - length($`) % 8)/e) {}
f82a8a74 MCC	199	if (m/^\s*\n/) {
	200	$data{$what}->{$tag} .= "\n";
	201	next;
	202	}
	203
	204	if (!defined($space)) {
e9bca891	205	# Preserve initial spaces for the first line
f82a8a74	206	if ($content =~ m/^(\s)(\S.)$/) {
e9bca891	207	$space = $1;
f82a8a74	208	$content = "$2\n";
4e6a6234 MCC	209	}
4e6a6234 MCC	210	} else {
4e6a6234	211	$space = "" if (!($content =~ s/^($space)//));
4e6a6234	212	}
f82a8a74 MCC	213	$data{$what}->{$tag} .= $content;
f82a8a74 MCC	214
4e6a6234 MCC	215	next;
4e6a6234 MCC	216	}
bbc249f2 MCC	217	if (m/^\s(.)/) {
	218	$data{$what}->{$tag} .= "\n$1";
	219	$data{$what}->{$tag} =~ s/\n+$//;
	220	next;
	221	}
	222
	223	# Everything else is error
	224	parse_error($file, $ln, "Unexpected line:", $_);
	225	}
234948bf MCC	226	$data{$nametag}->{description} =~ s/^\n+// if ($data{$nametag}->{description});
	227	if ($what) {
	228	parse_error($file, $ln, "What '$what' doesn't have a description", "") if (!$data{$what}->{description});
	229
	230	foreach my $w(split /, /,$what) {
c7ba3334	231	$symbols{$w}->{xref} = $what;
234948bf MCC	232	};
234948bf MCC	233	}
bbc249f2 MCC	234	close IN;
	235	}
	236
234948bf MCC	237	sub create_labels {
234948bf MCC	238	my %labels;
bbc249f2	239
234948bf MCC	240	foreach my $what (keys %data) {
234948bf MCC	241	next if ($data{$what}->{file} eq "File");
4e6a6234	242
234948bf	243	foreach my $p (@{$data{$what}->{label_list}}) {
d0ebaf51 MCC	244	my ($content, $label) = @{$p};
	245	$label = "abi_" . $label . " ";
	246	$label =~ tr/A-Z/a-z/;
	247
	248	# Convert special chars to "_"
	249	$label =~s/([\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\xff])/_/g;
	250	$label =~ s,_+,_,g;
	251	$label =~ s,_$,,;
	252
2e7ce055 MCC	253	# Avoid duplicated labels
	254	while (defined($labels{$label})) {
	255	my @chars = ("A".."Z", "a".."z");
	256	$label .= $chars[rand @chars];
	257	}
	258	$labels{$label} = 1;
	259
234948bf	260	$data{$what}->{label} = $label;
d0ebaf51 MCC	261
	262	# only one label is enough
	263	last;
6619c661	264	}
234948bf MCC	265	}
	266	}
	267
	268	#
	269	# Outputs the book on ReST format
	270	#
	271
	272	sub output_rest {
	273	create_labels();
	274
	275	foreach my $what (sort {
	276	($data{$a}->{type} eq "File") cmp ($data{$b}->{type} eq "File") \|\|
	277	$a cmp $b
	278	} keys %data) {
	279	my $type = $data{$what}->{type};
c7ba3334 MCC	280
	281	my @file = split / /, $data{$what}->{file};
	282	my @filepath = split / /, $data{$what}->{filepath};
234948bf MCC	283
	284	if ($enable_lineno) {
	285	printf "#define LINENO %s%s#%s\n\n",
c7ba3334	286	$prefix, $file[0],
234948bf MCC	287	$data{$what}->{line_no};
234948bf MCC	288	}
6619c661	289
234948bf MCC	290	my $w = $what;
234948bf MCC	291	$w =~ s/([\(\)\_\-\*\=\^\~\\])/\\$1/g;
6619c661	292
c7ba3334	293	if ($type ne "File") {
234948bf	294	printf ".. _%s:\n\n", $data{$what}->{label};
45f96517	295
234948bf	296	my @names = split /, /,$w;
45f96517 MCC	297	my $len = 0;
	298
	299	foreach my $name (@names) {
	300	$len = length($name) if (length($name) > $len);
	301	}
	302
	303	print "What:\n\n";
	304
	305	print "+-" . "-" x $len . "-+\n";
	306	foreach my $name (@names) {
	307	printf "\| %s", $name . " " x ($len - length($name)) . " \|\n";
	308	print "+-" . "-" x $len . "-+\n";
	309	}
45f96517	310
c7ba3334 MCC	311	print "\n";
	312	}
	313
	314	for (my $i = 0; $i < scalar(@filepath); $i++) {
	315	my $path = $filepath[$i];
	316	my $f = $file[$i];
	317
	318	$path =~ s,./(./.*),$1,;;
	319	$path =~ s,[/\-],_,g;;
	320	my $fileref = "abi_file_".$path;
	321
	322	if ($type eq "File") {
	323	my $bar = $w;
	324	$bar =~ s/./-/g;
	325
	326	print ".. _$fileref:\n\n";
	327	print "$w\n$bar\n\n";
	328	} else {
	329	print "Defined on file :ref:`$f <$fileref>`\n\n";
	330	}
234948bf	331	}
bbc249f2	332
234948bf MCC	333	my $desc = "";
	334	$desc = $data{$what}->{description} if (defined($data{$what}->{description}));
	335	$desc =~ s/\s+$/\n/;
bbc249f2	336
4e6a6234	337	if (!($desc =~ /^\s*$/)) {
11ce90a4 MCC	338	if ($description_is_rst) {
11ce90a4 MCC	339	print "$desc\n\n";
4e6a6234	340	} else {
11ce90a4	341	$desc =~ s/^\s+//;
bbc249f2	342
11ce90a4 MCC	343	# Remove title markups from the description, as they won't work
	344	$desc =~ s/\n[\-\*\=\^\~]+\n/\n\n/g;
	345
	346	if ($desc =~ m/\:\n/ \|\| $desc =~ m/\n[\t ]+/ \|\| $desc =~ m/[\x00-\x08\x0b-\x1f\x7b-\xff]/) {
	347	# put everything inside a code block
	348	$desc =~ s/\n/\n /g;
	349
	350	print "::\n\n";
	351	print " $desc\n\n";
	352	} else {
	353	# Escape any special chars from description
	354	$desc =~s/([\x00-\x08\x0b-\x1f\x21-\x2a\x2d\x2f\x3c-\x40\x5c\x5e-\x60\x7b-\xff])/\\$1/g;
	355	print "$desc\n\n";
	356	}
4e6a6234	357	}
bbc249f2	358	} else {
d0ebaf51	359	print "DESCRIPTION MISSING for $what\n\n" if (!$data{$what}->{is_file});
bbc249f2	360	}
6619c661	361
234948bf	362	if ($data{$what}->{symbols}) {
d0ebaf51 MCC	363	printf "Has the following ABI:\n\n";
d0ebaf51 MCC	364
234948bf	365	foreach my $content(@{$data{$what}->{symbols}}) {
c7ba3334	366	my $label = $data{$symbols{$content}->{xref}}->{label};
d0ebaf51 MCC	367
	368	# Escape special chars from content
	369	$content =~s/([\x00-\x1f\x21-\x2f\x3a-\x40\x7b-\xff])/\\$1/g;
	370
	371	print "- :ref:`$content <$label>`\n\n";
	372	}
	373	}
a16ab14e MCC	374
	375	if (defined($data{$what}->{users})) {
	376	my $users = $data{$what}->{users};
	377
	378	$users =~ s/\n/\n\t/g;
	379	printf "Users:\n\t%s\n\n", $users if ($users ne "");
	380	}
	381
bbc249f2 MCC	382	}
	383	}
	384
33e3e991 MCC	385	#
	386	# Searches for ABI symbols
	387	#
	388	sub search_symbols {
	389	foreach my $what (sort keys %data) {
	390	next if (!($what =~ m/($arg)/));
	391
	392	my $type = $data{$what}->{type};
	393	next if ($type eq "File");
	394
	395	my $file = $data{$what}->{filepath};
	396
	397	my $bar = $what;
	398	$bar =~ s/./-/g;
	399
	400	print "\n$what\n$bar\n\n";
	401
234948bf MCC	402	my $kernelversion = $data{$what}->{kernelversion} if (defined($data{$what}->{kernelversion}));
	403	my $contact = $data{$what}->{contact} if (defined($data{$what}->{contact}));
	404	my $users = $data{$what}->{users} if (defined($data{$what}->{users}));
	405	my $date = $data{$what}->{date} if (defined($data{$what}->{date}));
	406	my $desc = $data{$what}->{description} if (defined($data{$what}->{description}));
	407
	408	$kernelversion =~ s/^\s+// if ($kernelversion);
	409	$contact =~ s/^\s+// if ($contact);
	410	if ($users) {
	411	$users =~ s/^\s+//;
	412	$users =~ s/\n//g;
	413	}
	414	$date =~ s/^\s+// if ($date);
	415	$desc =~ s/^\s+// if ($desc);
33e3e991 MCC	416
	417	printf "Kernel version:\t\t%s\n", $kernelversion if ($kernelversion);
	418	printf "Date:\t\t\t%s\n", $date if ($date);
	419	printf "Contact:\t\t%s\n", $contact if ($contact);
	420	printf "Users:\t\t\t%s\n", $users if ($users);
c7ba3334	421	print "Defined on file(s):\t$file\n\n";
33e3e991 MCC	422	print "Description:\n\n$desc";
	423	}
	424	}
	425
61439c4a MCC	426	# Ensure that the prefix will always end with a slash
	427	# While this is not needed for find, it makes the patch nicer
	428	# with --enable-lineno
	429	$prefix =~ s,/?$,/,;
33e3e991	430
bbc249f2 MCC	431	#
	432	# Parses all ABI files located at $prefix dir
	433	#
	434	find({wanted =>\&parse_abi, no_chdir => 1}, $prefix);
	435
	436	print STDERR Data::Dumper->Dump([\%data], [qw(*data)]) if ($debug);
	437
	438	#
33e3e991	439	# Handles the command
bbc249f2	440	#
c7ba3334	441	if ($cmd eq "search") {
33e3e991	442	search_symbols;
c7ba3334 MCC	443	} else {
	444	if ($cmd eq "rest") {
	445	output_rest;
	446	}
	447
	448	# Warn about duplicated ABI entries
	449	foreach my $what(sort keys %symbols) {
	450	my @files = @{$symbols{$what}->{file}};
	451
	452	next if (scalar(@files) == 1);
bbc249f2	453
c7ba3334 MCC	454	printf STDERR "Warning: $what is defined %d times: @files\n",
	455	scalar(@files);
	456	}
	457	}
bbc249f2 MCC	458
	459	__END__
	460
	461	=head1 NAME
	462
	463	abi_book.pl - parse the Linux ABI files and produce a ReST book.
	464
	465	=head1 SYNOPSIS
	466
61439c4a MCC	467	B<abi_book.pl> [--debug] [--enable-lineno] [--man] [--help]
61439c4a MCC	468	[--(no-)rst-source] [--dir=<dir>] <COMAND> [<ARGUMENT>]
33e3e991 MCC	469
	470	Where <COMMAND> can be:
	471
	472	=over 8
	473
	474	B<search> [SEARCH_REGEX] - search for [SEARCH_REGEX] inside ABI
	475
7ce7b89b MCC	476	B<rest> - output the ABI in ReST markup language
	477
	478	B<validate> - validate the ABI contents
33e3e991 MCC	479
33e3e991 MCC	480	=back
bbc249f2 MCC	481
	482	=head1 OPTIONS
	483
	484	=over 8
	485
33e3e991 MCC	486	=item B<--dir>
	487
	488	Changes the location of the ABI search. By default, it uses
	489	the Documentation/ABI directory.
	490
11ce90a4 MCC	491	=item B<--rst-source> and B<--no-rst-source>
	492
	493	The input file may be using ReST syntax or not. Those two options allow
	494	selecting between a rst-compliant source ABI (--rst-source), or a
	495	plain text that may be violating ReST spec, so it requres some escaping
	496	logic (--no-rst-source).
	497
61439c4a MCC	498	=item B<--enable-lineno>
	499
	500	Enable output of #define LINENO lines.
	501
bbc249f2 MCC	502	=item B<--debug>
	503
	504	Put the script in verbose mode, useful for debugging. Can be called multiple
	505	times, to increase verbosity.
	506
	507	=item B<--help>
	508
	509	Prints a brief help message and exits.
	510
	511	=item B<--man>
	512
	513	Prints the manual page and exits.
	514
	515	=back
	516
	517	=head1 DESCRIPTION
	518
33e3e991 MCC	519	Parse the Linux ABI files from ABI DIR (usually located at Documentation/ABI),
	520	allowing to search for ABI symbols or to produce a ReST book containing
	521	the Linux ABI documentation.
	522
	523	=head1 EXAMPLES
	524
	525	Search for all stable symbols with the word "usb":
	526
	527	=over 8
	528
	529	$ scripts/get_abi.pl search usb --dir Documentation/ABI/stable
	530
	531	=back
	532
	533	Search for all symbols that match the regex expression "usb.*cap":
	534
	535	=over 8
	536
	537	$ scripts/get_abi.pl search usb.*cap
	538
	539	=back
	540
	541	Output all obsoleted symbols in ReST format
	542
	543	=over 8
	544
	545	$ scripts/get_abi.pl rest --dir Documentation/ABI/obsolete
	546
	547	=back
bbc249f2 MCC	548
	549	=head1 BUGS
	550
7ce7b89b	551	Report bugs to Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
bbc249f2 MCC	552
	553	=head1 COPYRIGHT
	554
7ce7b89b	555	Copyright (c) 2016-2019 by Mauro Carvalho Chehab <mchehab+samsung@kernel.org>.
bbc249f2 MCC	556
	557	License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
	558
	559	This is free software: you are free to change and redistribute it.
	560	There is NO WARRANTY, to the extent permitted by law.
	561
	562	=cut