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checkpatch.pl
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#!/usr/bin/perl -w
# (c) 2001, Dave Jones. (the file handling bit)
# (c) 2005, Joel Schopp <[email protected]> (the ugly bit)
# (c) 2007,2008, Andy Whitcroft <[email protected]> (new conditions, test suite)
# (c) 2008-2010 Andy Whitcroft <[email protected]>
# Licensed under the terms of the GNU GPL License version 2
use strict;
use POSIX;
my $P = $0;
$P =~ s@.*/@@g;
my $V = '0.32';
use Getopt::Long qw(:config no_auto_abbrev);
my $quiet = 0;
my $tree = 1;
my $chk_signoff = 1;
my $chk_patch = 1;
my $tst_only;
my $emacs = 0;
my $terse = 0;
my $file = 0;
my $check = 0;
my $check_orig = 0;
my $summary = 1;
my $mailback = 0;
my $summary_file = 0;
my $show_types = 0;
my $fix = 0;
my $fix_inplace = 0;
my $root;
my %debug;
my %camelcase = ();
my %use_type = ();
my @use = ();
my %ignore_type = ();
my @ignore = ();
my $help = 0;
my $configuration_file = ".checkpatch.conf";
my $max_line_length = 80;
my $ignore_perl_version = 0;
my $minimum_perl_version = 5.10.0;
sub help {
my ($exitcode) = @_;
print << "EOM";
Usage: $P [OPTION]... [FILE]...
Version: $V
Options:
-q, --quiet quiet
--no-tree run without a kernel tree
--no-signoff do not check for 'Signed-off-by' line
--patch treat FILE as patchfile (default)
--emacs emacs compile window format
--terse one line per report
-f, --file treat FILE as regular source file
--subjective, --strict enable more subjective tests
--types TYPE(,TYPE2...) show only these comma separated message types
--ignore TYPE(,TYPE2...) ignore various comma separated message types
--max-line-length=n set the maximum line length, if exceeded, warn
--show-types show the message "types" in the output
--root=PATH PATH to the kernel tree root
--no-summary suppress the per-file summary
--mailback only produce a report in case of warnings/errors
--summary-file include the filename in summary
--debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
'values', 'possible', 'type', and 'attr' (default
is all off)
--test-only=WORD report only warnings/errors containing WORD
literally
--fix EXPERIMENTAL - may create horrible results
If correctable single-line errors exist, create
"<inputfile>.EXPERIMENTAL-checkpatch-fixes"
with potential errors corrected to the preferred
checkpatch style
--fix-inplace EXPERIMENTAL - may create horrible results
Is the same as --fix, but overwrites the input
file. It's your fault if there's no backup or git
--ignore-perl-version override checking of perl version. expect
runtime errors.
-h, --help, --version display this help and exit
When FILE is - read standard input.
EOM
exit($exitcode);
}
my $conf = which_conf($configuration_file);
if (-f $conf) {
my @conf_args;
open(my $conffile, '<', "$conf")
or warn "$P: Can't find a readable $configuration_file file $!\n";
while (<$conffile>) {
my $line = $_;
$line =~ s/\s*\n?$//g;
$line =~ s/^\s*//g;
$line =~ s/\s+/ /g;
next if ($line =~ m/^\s*#/);
next if ($line =~ m/^\s*$/);
my @words = split(" ", $line);
foreach my $word (@words) {
last if ($word =~ m/^#/);
push (@conf_args, $word);
}
}
close($conffile);
unshift(@ARGV, @conf_args) if @conf_args;
}
GetOptions(
'q|quiet+' => \$quiet,
'tree!' => \$tree,
'signoff!' => \$chk_signoff,
'patch!' => \$chk_patch,
'emacs!' => \$emacs,
'terse!' => \$terse,
'f|file!' => \$file,
'subjective!' => \$check,
'strict!' => \$check,
'ignore=s' => \@ignore,
'types=s' => \@use,
'show-types!' => \$show_types,
'max-line-length=i' => \$max_line_length,
'root=s' => \$root,
'summary!' => \$summary,
'mailback!' => \$mailback,
'summary-file!' => \$summary_file,
'fix!' => \$fix,
'fix-inplace!' => \$fix_inplace,
'ignore-perl-version!' => \$ignore_perl_version,
'debug=s' => \%debug,
'test-only=s' => \$tst_only,
'h|help' => \$help,
'version' => \$help
) or help(1);
help(0) if ($help);
$fix = 1 if ($fix_inplace);
$check_orig = $check;
my $exit = 0;
if ($^V && $^V lt $minimum_perl_version) {
printf "$P: requires at least perl version %vd\n", $minimum_perl_version;
if (!$ignore_perl_version) {
exit(1);
}
}
if ($#ARGV < 0) {
print "$P: no input files\n";
exit(1);
}
sub hash_save_array_words {
my ($hashRef, $arrayRef) = @_;
my @array = split(/,/, join(',', @$arrayRef));
foreach my $word (@array) {
$word =~ s/\s*\n?$//g;
$word =~ s/^\s*//g;
$word =~ s/\s+/ /g;
$word =~ tr/[a-z]/[A-Z]/;
next if ($word =~ m/^\s*#/);
next if ($word =~ m/^\s*$/);
$hashRef->{$word}++;
}
}
sub hash_show_words {
my ($hashRef, $prefix) = @_;
if ($quiet == 0 && keys %$hashRef) {
print "NOTE: $prefix message types:";
foreach my $word (sort keys %$hashRef) {
print " $word";
}
print "\n\n";
}
}
hash_save_array_words(\%ignore_type, \@ignore);
hash_save_array_words(\%use_type, \@use);
my $dbg_values = 0;
my $dbg_possible = 0;
my $dbg_type = 0;
my $dbg_attr = 0;
for my $key (keys %debug) {
## no critic
eval "\${dbg_$key} = '$debug{$key}';";
die "$@" if ($@);
}
my $rpt_cleaners = 0;
if ($terse) {
$emacs = 1;
$quiet++;
}
if ($tree) {
if (defined $root) {
if (!top_of_kernel_tree($root)) {
die "$P: $root: --root does not point at a valid tree\n";
}
} else {
if (top_of_kernel_tree('.')) {
$root = '.';
} elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
top_of_kernel_tree($1)) {
$root = $1;
}
}
if (!defined $root) {
print "Must be run from the top-level dir. of a kernel tree\n";
exit(2);
}
}
my $emitted_corrupt = 0;
our $Ident = qr{
[A-Za-z_][A-Za-z\d_]*
(?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
}x;
our $Storage = qr{extern|static|asmlinkage};
our $Sparse = qr{
__user|
__kernel|
__force|
__iomem|
__must_check|
__init_refok|
__kprobes|
__ref|
__rcu
}x;
our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};
# Notes to $Attribute:
# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
our $Attribute = qr{
const|
__percpu|
__nocast|
__safe|
__bitwise__|
__packed__|
__packed2__|
__naked|
__maybe_unused|
__always_unused|
__noreturn|
__used|
__cold|
__noclone|
__deprecated|
__read_mostly|
__kprobes|
$InitAttribute|
____cacheline_aligned|
____cacheline_aligned_in_smp|
____cacheline_internodealigned_in_smp|
__weak
}x;
our $Modifier;
our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__};
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
our $Lval = qr{$Ident(?:$Member)*};
our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u};
our $Binary = qr{(?i)0b[01]+$Int_type?};
our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
our $Int = qr{[0-9]+$Int_type?};
our $Octal = qr{0[0-7]+$Int_type?};
our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
our $Float = qr{$Float_hex|$Float_dec|$Float_int};
our $Constant = qr{$Float|$Binary|$Octal|$Hex|$Int};
our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
our $Compare = qr{<=|>=|==|!=|<|(?<!-)>};
our $Arithmetic = qr{\+|-|\*|\/|%};
our $Operators = qr{
<=|>=|==|!=|
=>|->|<<|>>|<|>|!|~|
&&|\|\||,|\^|\+\+|--|&|\||$Arithmetic
}x;
our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x;
our $NonptrType;
our $NonptrTypeMisordered;
our $NonptrTypeWithAttr;
our $Type;
our $TypeMisordered;
our $Declare;
our $DeclareMisordered;
our $NON_ASCII_UTF8 = qr{
[\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
}x;
our $UTF8 = qr{
[\x09\x0A\x0D\x20-\x7E] # ASCII
| $NON_ASCII_UTF8
}x;
our $typeTypedefs = qr{(?x:
(?:__)?(?:u|s|be|le)(?:8|16|32|64)|
atomic_t
)};
our $logFunctions = qr{(?x:
printk(?:_ratelimited|_once|)|
(?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
WARN(?:_RATELIMIT|_ONCE|)|
panic|
MODULE_[A-Z_]+|
seq_vprintf|seq_printf|seq_puts
)};
our $signature_tags = qr{(?xi:
Signed-off-by:|
Acked-by:|
Tested-by:|
Reviewed-by:|
Reported-by:|
Suggested-by:|
To:|
Cc:
)};
our @typeListMisordered = (
qr{char\s+(?:un)?signed},
qr{int\s+(?:(?:un)?signed\s+)?short\s},
qr{int\s+short(?:\s+(?:un)?signed)},
qr{short\s+int(?:\s+(?:un)?signed)},
qr{(?:un)?signed\s+int\s+short},
qr{short\s+(?:un)?signed},
qr{long\s+int\s+(?:un)?signed},
qr{int\s+long\s+(?:un)?signed},
qr{long\s+(?:un)?signed\s+int},
qr{int\s+(?:un)?signed\s+long},
qr{int\s+(?:un)?signed},
qr{int\s+long\s+long\s+(?:un)?signed},
qr{long\s+long\s+int\s+(?:un)?signed},
qr{long\s+long\s+(?:un)?signed\s+int},
qr{long\s+long\s+(?:un)?signed},
qr{long\s+(?:un)?signed},
);
our @typeList = (
qr{void},
qr{(?:(?:un)?signed\s+)?char},
qr{(?:(?:un)?signed\s+)?short\s+int},
qr{(?:(?:un)?signed\s+)?short},
qr{(?:(?:un)?signed\s+)?int},
qr{(?:(?:un)?signed\s+)?long\s+int},
qr{(?:(?:un)?signed\s+)?long\s+long\s+int},
qr{(?:(?:un)?signed\s+)?long\s+long},
qr{(?:(?:un)?signed\s+)?long},
qr{(?:un)?signed},
qr{float},
qr{double},
qr{bool},
qr{struct\s+$Ident},
qr{union\s+$Ident},
qr{enum\s+$Ident},
qr{${Ident}_t},
qr{${Ident}_handler},
qr{${Ident}_handler_fn},
@typeListMisordered,
);
our @typeListWithAttr = (
@typeList,
qr{struct\s+$InitAttribute\s+$Ident},
qr{union\s+$InitAttribute\s+$Ident},
);
our @modifierList = (
qr{fastcall},
);
our @mode_permission_funcs = (
["module_param", 3],
["module_param_(?:array|named|string)", 4],
["module_param_array_named", 5],
["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
["proc_create(?:_data|)", 2],
["(?:CLASS|DEVICE|SENSOR)_ATTR", 2],
);
#Create a search pattern for all these functions to speed up a loop below
our $mode_perms_search = "";
foreach my $entry (@mode_permission_funcs) {
$mode_perms_search .= '|' if ($mode_perms_search ne "");
$mode_perms_search .= $entry->[0];
}
our $allowed_asm_includes = qr{(?x:
irq|
memory
)};
# memory.h: ARM has a custom one
sub build_types {
my $mods = "(?x: \n" . join("|\n ", @modifierList) . "\n)";
my $all = "(?x: \n" . join("|\n ", @typeList) . "\n)";
my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)";
my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)";
$Modifier = qr{(?:$Attribute|$Sparse|$mods)};
$NonptrType = qr{
(?:$Modifier\s+|const\s+)*
(?:
(?:typeof|__typeof__)\s*\([^\)]*\)|
(?:$typeTypedefs\b)|
(?:${all}\b)
)
(?:\s+$Modifier|\s+const)*
}x;
$NonptrTypeMisordered = qr{
(?:$Modifier\s+|const\s+)*
(?:
(?:${Misordered}\b)
)
(?:\s+$Modifier|\s+const)*
}x;
$NonptrTypeWithAttr = qr{
(?:$Modifier\s+|const\s+)*
(?:
(?:typeof|__typeof__)\s*\([^\)]*\)|
(?:$typeTypedefs\b)|
(?:${allWithAttr}\b)
)
(?:\s+$Modifier|\s+const)*
}x;
$Type = qr{
$NonptrType
(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
(?:\s+$Inline|\s+$Modifier)*
}x;
$TypeMisordered = qr{
$NonptrTypeMisordered
(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
(?:\s+$Inline|\s+$Modifier)*
}x;
$Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type};
$DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered};
}
build_types();
our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
# Using $balanced_parens, $LvalOrFunc, or $FuncArg
# requires at least perl version v5.10.0
# Any use must be runtime checked with $^V
our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*};
our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant)};
our $declaration_macros = qr{(?x:
(?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,2}\s*\(|
(?:$Storage\s+)?LIST_HEAD\s*\(|
(?:$Storage\s+)?${Type}\s+uninitialized_var\s*\(
)};
sub deparenthesize {
my ($string) = @_;
return "" if (!defined($string));
while ($string =~ /^\s*\(.*\)\s*$/) {
$string =~ s@^\s*\(\s*@@;
$string =~ s@\s*\)\s*$@@;
}
$string =~ s@\s+@ @g;
return $string;
}
sub seed_camelcase_file {
my ($file) = @_;
return if (!(-f $file));
local $/;
open(my $include_file, '<', "$file")
or warn "$P: Can't read '$file' $!\n";
my $text = <$include_file>;
close($include_file);
my @lines = split('\n', $text);
foreach my $line (@lines) {
next if ($line !~ /(?:[A-Z][a-z]|[a-z][A-Z])/);
if ($line =~ /^[ \t]*(?:#[ \t]*define|typedef\s+$Type)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)/) {
$camelcase{$1} = 1;
} elsif ($line =~ /^\s*$Declare\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[\(\[,;]/) {
$camelcase{$1} = 1;
} elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[;\{]/) {
$camelcase{$1} = 1;
}
}
}
my $camelcase_seeded = 0;
sub seed_camelcase_includes {
return if ($camelcase_seeded);
my $files;
my $camelcase_cache = "";
my @include_files = ();
$camelcase_seeded = 1;
if (-e ".git") {
my $git_last_include_commit = `git log --no-merges --pretty=format:"%h%n" -1 -- include`;
chomp $git_last_include_commit;
$camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
} else {
my $last_mod_date = 0;
$files = `find $root/include -name "*.h"`;
@include_files = split('\n', $files);
foreach my $file (@include_files) {
my $date = POSIX::strftime("%Y%m%d%H%M",
localtime((stat $file)[9]));
$last_mod_date = $date if ($last_mod_date < $date);
}
$camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date";
}
if ($camelcase_cache ne "" && -f $camelcase_cache) {
open(my $camelcase_file, '<', "$camelcase_cache")
or warn "$P: Can't read '$camelcase_cache' $!\n";
while (<$camelcase_file>) {
chomp;
$camelcase{$_} = 1;
}
close($camelcase_file);
return;
}
if (-e ".git") {
$files = `git ls-files "include/*.h"`;
@include_files = split('\n', $files);
}
foreach my $file (@include_files) {
seed_camelcase_file($file);
}
if ($camelcase_cache ne "") {
unlink glob ".checkpatch-camelcase.*";
open(my $camelcase_file, '>', "$camelcase_cache")
or warn "$P: Can't write '$camelcase_cache' $!\n";
foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
print $camelcase_file ("$_\n");
}
close($camelcase_file);
}
}
sub git_commit_info {
my ($commit, $id, $desc) = @_;
return ($id, $desc) if ((which("git") eq "") || !(-e ".git"));
my $output = `git log --no-color --format='%H %s' -1 $commit 2>&1`;
$output =~ s/^\s*//gm;
my @lines = split("\n", $output);
if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) {
# Maybe one day convert this block of bash into something that returns
# all matching commit ids, but it's very slow...
#
# echo "checking commits $1..."
# git rev-list --remotes | grep -i "^$1" |
# while read line ; do
# git log --format='%H %s' -1 $line |
# echo "commit $(cut -c 1-12,41-)"
# done
} elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./) {
} else {
$id = substr($lines[0], 0, 12);
$desc = substr($lines[0], 41);
}
return ($id, $desc);
}
$chk_signoff = 0 if ($file);
my @rawlines = ();
my @lines = ();
my @fixed = ();
my @fixed_inserted = ();
my @fixed_deleted = ();
my $fixlinenr = -1;
my $vname;
for my $filename (@ARGV) {
my $FILE;
if ($file) {
open($FILE, '-|', "diff -u /dev/null $filename") ||
die "$P: $filename: diff failed - $!\n";
} elsif ($filename eq '-') {
open($FILE, '<&STDIN');
} else {
open($FILE, '<', "$filename") ||
die "$P: $filename: open failed - $!\n";
}
if ($filename eq '-') {
$vname = 'Your patch';
} else {
$vname = $filename;
}
while (<$FILE>) {
chomp;
push(@rawlines, $_);
}
close($FILE);
if (!process($filename)) {
$exit = 1;
}
@rawlines = ();
@lines = ();
@fixed = ();
@fixed_inserted = ();
@fixed_deleted = ();
$fixlinenr = -1;
}
exit($exit);
sub top_of_kernel_tree {
my ($root) = @_;
my @tree_check = (
"COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
"README", "Documentation", "arch", "include", "drivers",
"fs", "init", "ipc", "kernel", "lib", "scripts",
);
foreach my $check (@tree_check) {
if (! -e $root . '/' . $check) {
return 0;
}
}
return 1;
}
sub parse_email {
my ($formatted_email) = @_;
my $name = "";
my $address = "";
my $comment = "";
if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
$name = $1;
$address = $2;
$comment = $3 if defined $3;
} elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
$address = $1;
$comment = $2 if defined $2;
} elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
$address = $1;
$comment = $2 if defined $2;
$formatted_email =~ s/$address.*$//;
$name = $formatted_email;
$name = trim($name);
$name =~ s/^\"|\"$//g;
# If there's a name left after stripping spaces and
# leading quotes, and the address doesn't have both
# leading and trailing angle brackets, the address
# is invalid. ie:
# "joe smith [email protected]" bad
# "joe smith <[email protected]" bad
if ($name ne "" && $address !~ /^<[^>]+>$/) {
$name = "";
$address = "";
$comment = "";
}
}
$name = trim($name);
$name =~ s/^\"|\"$//g;
$address = trim($address);
$address =~ s/^\<|\>$//g;
if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
$name =~ s/(?<!\\)"/\\"/g; ##escape quotes
$name = "\"$name\"";
}
return ($name, $address, $comment);
}
sub format_email {
my ($name, $address) = @_;
my $formatted_email;
$name = trim($name);
$name =~ s/^\"|\"$//g;
$address = trim($address);
if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
$name =~ s/(?<!\\)"/\\"/g; ##escape quotes
$name = "\"$name\"";
}
if ("$name" eq "") {
$formatted_email = "$address";
} else {
$formatted_email = "$name <$address>";
}
return $formatted_email;
}
sub which {
my ($bin) = @_;
foreach my $path (split(/:/, $ENV{PATH})) {
if (-e "$path/$bin") {
return "$path/$bin";
}
}
return "";
}
sub which_conf {
my ($conf) = @_;
foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
if (-e "$path/$conf") {
return "$path/$conf";
}
}
return "";
}
sub expand_tabs {
my ($str) = @_;
my $res = '';
my $n = 0;
for my $c (split(//, $str)) {
if ($c eq "\t") {
$res .= ' ';
$n++;
for (; ($n % 8) != 0; $n++) {
$res .= ' ';
}
next;
}
$res .= $c;
$n++;
}
return $res;
}
sub copy_spacing {
(my $res = shift) =~ tr/\t/ /c;
return $res;
}
sub line_stats {
my ($line) = @_;
# Drop the diff line leader and expand tabs
$line =~ s/^.//;
$line = expand_tabs($line);
# Pick the indent from the front of the line.
my ($white) = ($line =~ /^(\s*)/);
return (length($line), length($white));
}
my $sanitise_quote = '';
sub sanitise_line_reset {
my ($in_comment) = @_;
if ($in_comment) {
$sanitise_quote = '*/';
} else {
$sanitise_quote = '';
}
}
sub sanitise_line {
my ($line) = @_;
my $res = '';
my $l = '';
my $qlen = 0;
my $off = 0;
my $c;
# Always copy over the diff marker.
$res = substr($line, 0, 1);
for ($off = 1; $off < length($line); $off++) {
$c = substr($line, $off, 1);
# Comments we are wacking completly including the begin
# and end, all to $;.
if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
$sanitise_quote = '*/';
substr($res, $off, 2, "$;$;");
$off++;
next;
}
if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
$sanitise_quote = '';
substr($res, $off, 2, "$;$;");
$off++;
next;
}
if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
$sanitise_quote = '//';
substr($res, $off, 2, $sanitise_quote);
$off++;
next;
}
# A \ in a string means ignore the next character.
if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
$c eq "\\") {
substr($res, $off, 2, 'XX');
$off++;
next;
}
# Regular quotes.
if ($c eq "'" || $c eq '"') {
if ($sanitise_quote eq '') {
$sanitise_quote = $c;
substr($res, $off, 1, $c);
next;
} elsif ($sanitise_quote eq $c) {
$sanitise_quote = '';
}
}
#print "c<$c> SQ<$sanitise_quote>\n";
if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
substr($res, $off, 1, $;);
} elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
substr($res, $off, 1, $;);
} elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
substr($res, $off, 1, 'X');
} else {
substr($res, $off, 1, $c);
}
}
if ($sanitise_quote eq '//') {
$sanitise_quote = '';
}
# The pathname on a #include may be surrounded by '<' and '>'.
if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
my $clean = 'X' x length($1);
$res =~ s@\<.*\>@<$clean>@;
# The whole of a #error is a string.
} elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
my $clean = 'X' x length($1);
$res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
}
return $res;
}
sub get_quoted_string {
my ($line, $rawline) = @_;
return "" if ($line !~ m/(\"[X]+\")/g);
return substr($rawline, $-[0], $+[0] - $-[0]);
}
sub ctx_statement_block {
my ($linenr, $remain, $off) = @_;
my $line = $linenr - 1;
my $blk = '';
my $soff = $off;
my $coff = $off - 1;
my $coff_set = 0;
my $loff = 0;
my $type = '';
my $level = 0;
my @stack = ();
my $p;
my $c;
my $len = 0;
my $remainder;
while (1) {
@stack = (['', 0]) if ($#stack == -1);
#warn "CSB: blk<$blk> remain<$remain>\n";
# If we are about to drop off the end, pull in more
# context.
if ($off >= $len) {
for (; $remain > 0; $line++) {
last if (!defined $lines[$line]);
next if ($lines[$line] =~ /^-/);
$remain--;
$loff = $len;
$blk .= $lines[$line] . "\n";
$len = length($blk);
$line++;
last;
}
# Bail if there is no further context.
#warn "CSB: blk<$blk> off<$off> len<$len>\n";
if ($off >= $len) {
last;
}
if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
$level++;
$type = '#';
}
}
$p = $c;
$c = substr($blk, $off, 1);
$remainder = substr($blk, $off);
#warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
# Handle nested #if/#else.
if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
push(@stack, [ $type, $level ]);
} elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
($type, $level) = @{$stack[$#stack - 1]};
} elsif ($remainder =~ /^#\s*endif\b/) {
($type, $level) = @{pop(@stack)};
}
# Statement ends at the ';' or a close '}' at the
# outermost level.
if ($level == 0 && $c eq ';') {
last;
}
# An else is really a conditional as long as its not else if
if ($level == 0 && $coff_set == 0 &&
(!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
$remainder =~ /^(else)(?:\s|{)/ &&
$remainder !~ /^else\s+if\b/) {
$coff = $off + length($1) - 1;
$coff_set = 1;
#warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
#warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
}
if (($type eq '' || $type eq '(') && $c eq '(') {
$level++;
$type = '(';
}
if ($type eq '(' && $c eq ')') {