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linux-next/Documentation/sphinx/parse-headers.pl
Mauro Carvalho Chehab 22c4003364 [media] docs-rst: parse-headers.pl: use the C domain for cross-references
Instead of keep using the normal reference, move to the C
domain ones. Using C domains everywhere will allow
cross-references between kAPI and uAPI docs.

Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-09-09 09:20:27 -03:00

333 lines
6.7 KiB
Perl
Executable File

#!/usr/bin/perl
use strict;
use Text::Tabs;
my $debug = 0;
while ($ARGV[0] =~ m/^-(.*)/) {
my $cmd = shift @ARGV;
if ($cmd eq "--debug") {
require Data::Dumper;
$debug = 1;
next;
}
die "argument $cmd unknown";
}
if (scalar @ARGV < 2 || scalar @ARGV > 3) {
die "Usage:\n\t$0 <file in> <file out> [<exceptions file>]\n";
}
my ($file_in, $file_out, $file_exceptions) = @ARGV;
my $data;
my %ioctls;
my %defines;
my %typedefs;
my %enums;
my %enum_symbols;
my %structs;
#
# read the file and get identifiers
#
my $is_enum = 0;
my $is_comment = 0;
open IN, $file_in or die "Can't open $file_in";
while (<IN>) {
$data .= $_;
my $ln = $_;
if (!$is_comment) {
$ln =~ s,/\*.*(\*/),,g;
$is_comment = 1 if ($ln =~ s,/\*.*,,);
} else {
if ($ln =~ s,^(.*\*/),,) {
$is_comment = 0;
} else {
next;
}
}
if ($is_enum && $ln =~ m/^\s*([_\w][\w\d_]+)\s*[\,=]?/) {
my $s = $1;
my $n = $1;
$n =~ tr/A-Z/a-z/;
$n =~ tr/_/-/;
$enum_symbols{$s} = "\\ :ref:`$s <$n>`\\ ";
$is_enum = 0 if ($is_enum && m/\}/);
next;
}
$is_enum = 0 if ($is_enum && m/\}/);
if ($ln =~ m/^\s*#\s*define\s+([_\w][\w\d_]+)\s+_IO/) {
my $s = $1;
my $n = $1;
$n =~ tr/A-Z/a-z/;
$ioctls{$s} = "\\ :ref:`$s <$n>`\\ ";
next;
}
if ($ln =~ m/^\s*#\s*define\s+([_\w][\w\d_]+)\s+/) {
my $s = $1;
my $n = $1;
$n =~ tr/A-Z/a-z/;
$n =~ tr/_/-/;
$defines{$s} = "\\ :ref:`$s <$n>`\\ ";
next;
}
if ($ln =~ m/^\s*typedef\s+([_\w][\w\d_]+)\s+(.*)\s+([_\w][\w\d_]+);/) {
my $s = $2;
my $n = $3;
$typedefs{$n} = "\\ :c:type:`$n <$s>`\\ ";
next;
}
if ($ln =~ m/^\s*enum\s+([_\w][\w\d_]+)\s+\{/
|| $ln =~ m/^\s*enum\s+([_\w][\w\d_]+)$/
|| $ln =~ m/^\s*typedef\s*enum\s+([_\w][\w\d_]+)\s+\{/
|| $ln =~ m/^\s*typedef\s*enum\s+([_\w][\w\d_]+)$/) {
my $s = $1;
$enums{$s} = "enum :c:type:`$s`\\ ";
$is_enum = $1;
next;
}
if ($ln =~ m/^\s*struct\s+([_\w][\w\d_]+)\s+\{/
|| $ln =~ m/^\s*struct\s+([[_\w][\w\d_]+)$/
|| $ln =~ m/^\s*typedef\s*struct\s+([_\w][\w\d_]+)\s+\{/
|| $ln =~ m/^\s*typedef\s*struct\s+([[_\w][\w\d_]+)$/
) {
my $s = $1;
$structs{$s} = "struct :c:type:`$s`\\ ";
next;
}
}
close IN;
#
# Handle multi-line typedefs
#
my @matches = ($data =~ m/typedef\s+struct\s+\S+?\s*\{[^\}]+\}\s*(\S+)\s*\;/g,
$data =~ m/typedef\s+enum\s+\S+?\s*\{[^\}]+\}\s*(\S+)\s*\;/g,);
foreach my $m (@matches) {
my $s = $m;
$typedefs{$s} = "\\ :c:type:`$s`\\ ";
next;
}
#
# Handle exceptions, if any
#
my %def_reftype = (
"ioctl" => ":ref",
"define" => ":ref",
"symbol" => ":ref",
"typedef" => ":c:type",
"enum" => ":c:type",
"struct" => ":c:type",
);
if ($file_exceptions) {
open IN, $file_exceptions or die "Can't read $file_exceptions";
while (<IN>) {
next if (m/^\s*$/ || m/^\s*#/);
# Parsers to ignore a symbol
if (m/^ignore\s+ioctl\s+(\S+)/) {
delete $ioctls{$1} if (exists($ioctls{$1}));
next;
}
if (m/^ignore\s+define\s+(\S+)/) {
delete $defines{$1} if (exists($defines{$1}));
next;
}
if (m/^ignore\s+typedef\s+(\S+)/) {
delete $typedefs{$1} if (exists($typedefs{$1}));
next;
}
if (m/^ignore\s+enum\s+(\S+)/) {
delete $enums{$1} if (exists($enums{$1}));
next;
}
if (m/^ignore\s+struct\s+(\S+)/) {
delete $structs{$1} if (exists($structs{$1}));
next;
}
if (m/^ignore\s+symbol\s+(\S+)/) {
delete $enum_symbols{$1} if (exists($enum_symbols{$1}));
next;
}
# Parsers to replace a symbol
my ($type, $old, $new, $reftype);
if (m/^replace\s+(\S+)\s+(\S+)\s+(\S+)/) {
$type = $1;
$old = $2;
$new = $3;
} else {
die "Can't parse $file_exceptions: $_";
}
if ($new =~ m/^\:c\:(data|func|macro|type)\:\`(.+)\`/) {
$reftype = ":c:$1";
$new = $2;
} elsif ($new =~ m/\:ref\:\`(.+)\`/) {
$reftype = ":ref";
$new = $1;
} else {
$reftype = $def_reftype{$type};
}
$new = "$reftype:`$old <$new>`";
if ($type eq "ioctl") {
$ioctls{$old} = $new if (exists($ioctls{$old}));
next;
}
if ($type eq "define") {
$defines{$old} = $new if (exists($defines{$old}));
next;
}
if ($type eq "symbol") {
$enum_symbols{$old} = $new if (exists($enum_symbols{$old}));
next;
}
if ($type eq "typedef") {
$typedefs{$old} = $new if (exists($typedefs{$old}));
next;
}
if ($type eq "enum") {
$enums{$old} = $new if (exists($enums{$old}));
next;
}
if ($type eq "struct") {
$structs{$old} = $new if (exists($structs{$old}));
next;
}
die "Can't parse $file_exceptions: $_";
}
}
if ($debug) {
print Data::Dumper->Dump([\%ioctls], [qw(*ioctls)]) if (%ioctls);
print Data::Dumper->Dump([\%typedefs], [qw(*typedefs)]) if (%typedefs);
print Data::Dumper->Dump([\%enums], [qw(*enums)]) if (%enums);
print Data::Dumper->Dump([\%structs], [qw(*structs)]) if (%structs);
print Data::Dumper->Dump([\%defines], [qw(*defines)]) if (%defines);
print Data::Dumper->Dump([\%enum_symbols], [qw(*enum_symbols)]) if (%enum_symbols);
}
#
# Align block
#
$data = expand($data);
$data = " " . $data;
$data =~ s/\n/\n /g;
$data =~ s/\n\s+$/\n/g;
$data =~ s/\n\s+\n/\n\n/g;
#
# Add escape codes for special characters
#
$data =~ s,([\_\`\*\<\>\&\\\\:\/\|\%\$\#\{\}\~\^]),\\$1,g;
$data =~ s,DEPRECATED,**DEPRECATED**,g;
#
# Add references
#
my $start_delim = "[ \n\t\(\=\*\@]";
my $end_delim = "(\\s|,|\\\\=|\\\\:|\\;|\\\)|\\}|\\{)";
foreach my $r (keys %ioctls) {
my $s = $ioctls{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/($start_delim)($r)$end_delim/$1$s$3/g;
}
foreach my $r (keys %defines) {
my $s = $defines{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/($start_delim)($r)$end_delim/$1$s$3/g;
}
foreach my $r (keys %enum_symbols) {
my $s = $enum_symbols{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/($start_delim)($r)$end_delim/$1$s$3/g;
}
foreach my $r (keys %enums) {
my $s = $enums{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/enum\s+($r)$end_delim/$s$2/g;
}
foreach my $r (keys %structs) {
my $s = $structs{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/struct\s+($r)$end_delim/$s$2/g;
}
foreach my $r (keys %typedefs) {
my $s = $typedefs{$r};
$r =~ s,([\_\`\*\<\>\&\\\\:\/]),\\\\$1,g;
print "$r -> $s\n" if ($debug);
$data =~ s/($start_delim)($r)$end_delim/$1$s$3/g;
}
$data =~ s/\\ ([\n\s])/\1/g;
#
# Generate output file
#
my $title = $file_in;
$title =~ s,.*/,,;
open OUT, "> $file_out" or die "Can't open $file_out";
print OUT ".. -*- coding: utf-8; mode: rst -*-\n\n";
print OUT "$title\n";
print OUT "=" x length($title);
print OUT "\n\n.. parsed-literal::\n\n";
print OUT $data;
close OUT;