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if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
my ($name_len) = length($1);
my $ctx = $s;
substr($ctx, 0, $name_len + 1, '');
$ctx =~ s/\)[^\)]*$//;
for my $arg (split(/\s*,\s*/, $ctx)) {
if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
possible($1, "D:" . $s);
}
}
}
}
#
# Checks which may be anchored in the context.
#
# Check for switch () and associated case and default
# statements should be at the same indent.
if ($line=~/\bswitch\s*\(.*\)/) {
my $err = '';
my $sep = '';
my @ctx = ctx_block_outer($linenr, $realcnt);
shift(@ctx);
for my $ctx (@ctx) {
my ($clen, $cindent) = line_stats($ctx);
if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
$indent != $cindent) {
$err .= "$sep$ctx\n";
$sep = '';
} else {
$sep = "[...]\n";
}
}
if ($err ne '') {
ERROR("SWITCH_CASE_INDENT_LEVEL",
"switch and case should be at the same indent\n$hereline$err");
}
}
# if/while/etc brace do not go on next line, unless defining a do while loop,
# or if that brace on the next line is for something else
if ($line =~ /(.*)\b((?:if|while|for|switch)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
my $pre_ctx = "$1$2";
my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
if ($line =~ /^\+\t{6,}/) {
WARN("DEEP_INDENTATION",
"Too many leading tabs - consider code refactoring\n" . $herecurr);
}
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my $ctx_cnt = $realcnt - $#ctx - 1;
my $ctx = join("\n", @ctx);
my $ctx_ln = $linenr;
my $ctx_skip = $realcnt;
while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
defined $lines[$ctx_ln - 1] &&
$lines[$ctx_ln - 1] =~ /^-/)) {
##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
$ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
$ctx_ln++;
}
#print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
#print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln -1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
ERROR("OPEN_BRACE",
"that open brace { should be on the previous line\n" .
"$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
}
if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
$ctx =~ /\)\s*\;\s*$/ &&
defined $lines[$ctx_ln - 1])
{
my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
if ($nindent > $indent) {
WARN("TRAILING_SEMICOLON",
"trailing semicolon indicates no statements, indent implies otherwise\n" .
"$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
}
}
}
# Check relative indent for conditionals and blocks.
if ($line =~ /\b(?:(?:if|while|for)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
ctx_statement_block($linenr, $realcnt, 0)
if (!defined $stat);
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my ($s, $c) = ($stat, $cond);
substr($s, 0, length($c), '');
# Make sure we remove the line prefixes as we have
# none on the first line, and are going to readd them
# where necessary.
$s =~ s/\n./\n/gs;
# Find out how long the conditional actually is.
my @newlines = ($c =~ /\n/gs);
my $cond_lines = 1 + $#newlines;
# We want to check the first line inside the block
# starting at the end of the conditional, so remove:
# 1) any blank line termination
# 2) any opening brace { on end of the line
# 3) any do (...) {
my $continuation = 0;
my $check = 0;
$s =~ s/^.*\bdo\b//;
$s =~ s/^\s*{//;
if ($s =~ s/^\s*\\//) {
$continuation = 1;
}
if ($s =~ s/^\s*?\n//) {
$check = 1;
$cond_lines++;
}
# Also ignore a loop construct at the end of a
# preprocessor statement.
if (($prevline =~ /^.\s*#\s*define\s/ ||
$prevline =~ /\\\s*$/) && $continuation == 0) {
$check = 0;
}
my $cond_ptr = -1;
$continuation = 0;
while ($cond_ptr != $cond_lines) {
$cond_ptr = $cond_lines;
# If we see an #else/#elif then the code
# is not linear.
if ($s =~ /^\s*\#\s*(?:else|elif)/) {
$check = 0;
}
# Ignore:
# 1) blank lines, they should be at 0,
# 2) preprocessor lines, and
# 3) labels.
if ($continuation ||
$s =~ /^\s*?\n/ ||
$s =~ /^\s*#\s*?/ ||
$s =~ /^\s*$Ident\s*:/) {
$continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
if ($s =~ s/^.*?\n//) {
$cond_lines++;
}
}
}
my (undef, $sindent) = line_stats("+" . $s);
my $stat_real = raw_line($linenr, $cond_lines);
# Check if either of these lines are modified, else
# this is not this patch's fault.
if (!defined($stat_real) ||
$stat !~ /^\+/ && $stat_real !~ /^\+/) {
$check = 0;
}
if (defined($stat_real) && $cond_lines > 1) {
$stat_real = "[...]\n$stat_real";
}
#print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
if ($check && (($sindent % 8) != 0 ||
($sindent <= $indent && $s ne ''))) {
WARN("SUSPECT_CODE_INDENT",
"suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
}
}
# Track the 'values' across context and added lines.
my $opline = $line; $opline =~ s/^./ /;
my ($curr_values, $curr_vars) =
annotate_values($opline . "\n", $prev_values);
$curr_values = $prev_values . $curr_values;
if ($dbg_values) {
my $outline = $opline; $outline =~ s/\t/ /g;
print "$linenr > .$outline\n";
print "$linenr > $curr_values\n";
print "$linenr > $curr_vars\n";
}
$prev_values = substr($curr_values, -1);
#ignore lines not being added
if ($line=~/^[^\+]/) {next;}
# TEST: allow direct testing of the type matcher.
if ($dbg_type) {
if ($line =~ /^.\s*$Declare\s*$/) {
ERROR("TEST_TYPE",
"TEST: is type\n" . $herecurr);
} elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
ERROR("TEST_NOT_TYPE",
"TEST: is not type ($1 is)\n". $herecurr);
}
next;
}
# TEST: allow direct testing of the attribute matcher.
if ($dbg_attr) {
if ($line =~ /^.\s*$Modifier\s*$/) {
ERROR("TEST_ATTR",
"TEST: is attr\n" . $herecurr);
} elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
ERROR("TEST_NOT_ATTR",
"TEST: is not attr ($1 is)\n". $herecurr);
}
next;
}
# check for initialisation to aggregates open brace on the next line
if ($line =~ /^.\s*{/ &&
$prevline =~ /(?:^|[^=])=\s*$/) {
ERROR("OPEN_BRACE",
"that open brace { should be on the previous line\n" . $hereprev);
}
#
# Checks which are anchored on the added line.
#
# check for malformed paths in #include statements (uses RAW line)
if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
my $path = $1;
if ($path =~ m{//}) {
ERROR("MALFORMED_INCLUDE",
"malformed #include filename\n" . $herecurr);
}
if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
ERROR("UAPI_INCLUDE",
"No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
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}
}
# no C99 // comments
if ($line =~ m{//}) {
ERROR("C99_COMMENTS",
"do not use C99 // comments\n" . $herecurr);
}
# Remove C99 comments.
$line =~ s@//.*@@;
$opline =~ s@//.*@@;
# EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
# the whole statement.
#print "APW <$lines[$realline_next - 1]>\n";
if (defined $realline_next &&
exists $lines[$realline_next - 1] &&
!defined $suppress_export{$realline_next} &&
($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
$lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
# Handle definitions which produce identifiers with
# a prefix:
# XXX(foo);
# EXPORT_SYMBOL(something_foo);
my $name = $1;
if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
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$name =~ /^${Ident}_$2/) {
#print "FOO C name<$name>\n";
$suppress_export{$realline_next} = 1;
} elsif ($stat !~ /(?:
\n.}\s*$|
^.DEFINE_$Ident\(\Q$name\E\)|
^.DECLARE_$Ident\(\Q$name\E\)|
^.LIST_HEAD\(\Q$name\E\)|
^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
\b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
)/x) {
#print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
$suppress_export{$realline_next} = 2;
} else {
$suppress_export{$realline_next} = 1;
}
}
if (!defined $suppress_export{$linenr} &&
$prevline =~ /^.\s*$/ &&
($line =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
$line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
#print "FOO B <$lines[$linenr - 1]>\n";
$suppress_export{$linenr} = 2;
}
if (defined $suppress_export{$linenr} &&
$suppress_export{$linenr} == 2) {
WARN("EXPORT_SYMBOL",
"EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
}
# check for global initialisers.
if ($line =~ /^.$Type\s*$Ident\s*(?:\s+$Modifier)*\s*=\s*(0|NULL|false)\s*;/) {
ERROR("GLOBAL_INITIALISERS",
"do not initialise globals to 0 or NULL\n" .
$herecurr);
}
# check for static initialisers.
if ($line =~ /\bstatic\s.*=\s*(0|NULL|false)\s*;/) {
ERROR("INITIALISED_STATIC",
"do not initialise statics to 0 or NULL\n" .
$herecurr);
}
# check for static const char * arrays.
if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
WARN("STATIC_CONST_CHAR_ARRAY",
"static const char * array should probably be static const char * const\n" .
$herecurr);
}
# check for static char foo[] = "bar" declarations.
if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
WARN("STATIC_CONST_CHAR_ARRAY",
"static char array declaration should probably be static const char\n" .
$herecurr);
}
# check for declarations of struct pci_device_id
if ($line =~ /\bstruct\s+pci_device_id\s+\w+\s*\[\s*\]\s*\=\s*\{/) {
WARN("DEFINE_PCI_DEVICE_TABLE",
"Use DEFINE_PCI_DEVICE_TABLE for struct pci_device_id\n" . $herecurr);
}
# check for new typedefs, only function parameters and sparse annotations
# make sense.
if ($line =~ /\btypedef\s/ &&
$line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
$line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
$line !~ /\b$typeTypedefs\b/ &&
$line !~ /\b__bitwise(?:__|)\b/) {
WARN("NEW_TYPEDEFS",
"do not add new typedefs\n" . $herecurr);
}
# * goes on variable not on type
# (char*[ const])
while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
#print "AA<$1>\n";
my ($from, $to) = ($2, $2);
# Should start with a space.
$to =~ s/^(\S)/ $1/;
# Should not end with a space.
$to =~ s/\s+$//;
# '*'s should not have spaces between.
while ($to =~ s/\*\s+\*/\*\*/) {
}
#print "from<$from> to<$to>\n";
if ($from ne $to) {
ERROR("POINTER_LOCATION",
"\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr);
}
}
while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
#print "BB<$1>\n";
my ($from, $to, $ident) = ($2, $2, $3);
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# Should start with a space.
$to =~ s/^(\S)/ $1/;
# Should not end with a space.
$to =~ s/\s+$//;
# '*'s should not have spaces between.
while ($to =~ s/\*\s+\*/\*\*/) {
}
# Modifiers should have spaces.
$to =~ s/(\b$Modifier$)/$1 /;
#print "from<$from> to<$to> ident<$ident>\n";
if ($from ne $to && $ident !~ /^$Modifier$/) {
ERROR("POINTER_LOCATION",
"\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr);
}
}
# # no BUG() or BUG_ON()
# if ($line =~ /\b(BUG|BUG_ON)\b/) {
# print "Try to use WARN_ON & Recovery code rather than BUG() or BUG_ON()\n";
# print "$herecurr";
# $clean = 0;
# }
if ($line =~ /\bLINUX_VERSION_CODE\b/) {
WARN("LINUX_VERSION_CODE",
"LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
}
# check for uses of printk_ratelimit
if ($line =~ /\bprintk_ratelimit\s*\(/) {
WARN("PRINTK_RATELIMITED",
"Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
}
# printk should use KERN_* levels. Note that follow on printk's on the
# same line do not need a level, so we use the current block context
# to try and find and validate the current printk. In summary the current
# printk includes all preceding printk's which have no newline on the end.
# we assume the first bad printk is the one to report.
if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
my $ok = 0;
for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
#print "CHECK<$lines[$ln - 1]\n";
# we have a preceding printk if it ends
# with "\n" ignore it, else it is to blame
if ($lines[$ln - 1] =~ m{\bprintk\(}) {
if ($rawlines[$ln - 1] !~ m{\\n"}) {
$ok = 1;
}
last;
}
}
if ($ok == 0) {
WARN("PRINTK_WITHOUT_KERN_LEVEL",
"printk() should include KERN_ facility level\n" . $herecurr);
}
}
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if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
my $orig = $1;
my $level = lc($orig);
$level = "warn" if ($level eq "warning");
my $level2 = $level;
$level2 = "dbg" if ($level eq "debug");
WARN("PREFER_PR_LEVEL",
"Prefer netdev_$level2(netdev, ... then dev_$level2(dev, ... then pr_$level(... to printk(KERN_$orig ...\n" . $herecurr);
}
if ($line =~ /\bpr_warning\s*\(/) {
WARN("PREFER_PR_LEVEL",
"Prefer pr_warn(... to pr_warning(...\n" . $herecurr);
}
if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
my $orig = $1;
my $level = lc($orig);
$level = "warn" if ($level eq "warning");
$level = "dbg" if ($level eq "debug");
WARN("PREFER_DEV_LEVEL",
"Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
}
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# function brace can't be on same line, except for #defines of do while,
# or if closed on same line
if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
!($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
ERROR("OPEN_BRACE",
"open brace '{' following function declarations go on the next line\n" . $herecurr);
}
# open braces for enum, union and struct go on the same line.
if ($line =~ /^.\s*{/ &&
$prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
ERROR("OPEN_BRACE",
"open brace '{' following $1 go on the same line\n" . $hereprev);
}
# missing space after union, struct or enum definition
if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?(?:\s+$Ident)?[=\{]/) {
WARN("SPACING",
"missing space after $1 definition\n" . $herecurr);
}
# check for spacing round square brackets; allowed:
# 1. with a type on the left -- int [] a;
# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
# 3. inside a curly brace -- = { [0...10] = 5 }
while ($line =~ /(.*?\s)\[/g) {
my ($where, $prefix) = ($-[1], $1);
if ($prefix !~ /$Type\s+$/ &&
($where != 0 || $prefix !~ /^.\s+$/) &&
$prefix !~ /[{,]\s+$/) {
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ERROR("BRACKET_SPACE",
"space prohibited before open square bracket '['\n" . $herecurr);
}
}
# check for spaces between functions and their parentheses.
while ($line =~ /($Ident)\s+\(/g) {
my $name = $1;
my $ctx_before = substr($line, 0, $-[1]);
my $ctx = "$ctx_before$name";
# Ignore those directives where spaces _are_ permitted.
if ($name =~ /^(?:
if|for|while|switch|return|case|
volatile|__volatile__|
__attribute__|format|__extension__|
asm|__asm__)$/x)
{
# cpp #define statements have non-optional spaces, ie
# if there is a space between the name and the open
# parenthesis it is simply not a parameter group.
} elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
# cpp #elif statement condition may start with a (
} elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
# If this whole things ends with a type its most
# likely a typedef for a function.
} elsif ($ctx =~ /$Type$/) {
} else {
WARN("SPACING",
"space prohibited between function name and open parenthesis '('\n" . $herecurr);
}
}
# check for whitespace before a non-naked semicolon
if ($line =~ /^\+.*\S\s+;/) {
CHK("SPACING",
"space prohibited before semicolon\n" . $herecurr);
}
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# Check operator spacing.
if (!($line=~/\#\s*include/)) {
my $ops = qr{
<<=|>>=|<=|>=|==|!=|
\+=|-=|\*=|\/=|%=|\^=|\|=|&=|
=>|->|<<|>>|<|>|=|!|~|
&&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
\?|:
}x;
my @elements = split(/($ops|;)/, $opline);
my $off = 0;
my $blank = copy_spacing($opline);
for (my $n = 0; $n < $#elements; $n += 2) {
$off += length($elements[$n]);
# Pick up the preceding and succeeding characters.
my $ca = substr($opline, 0, $off);
my $cc = '';
if (length($opline) >= ($off + length($elements[$n + 1]))) {
$cc = substr($opline, $off + length($elements[$n + 1]));
}
my $cb = "$ca$;$cc";
my $a = '';
$a = 'V' if ($elements[$n] ne '');
$a = 'W' if ($elements[$n] =~ /\s$/);
$a = 'C' if ($elements[$n] =~ /$;$/);
$a = 'B' if ($elements[$n] =~ /(\[|\()$/);
$a = 'O' if ($elements[$n] eq '');
$a = 'E' if ($ca =~ /^\s*$/);
my $op = $elements[$n + 1];
my $c = '';
if (defined $elements[$n + 2]) {
$c = 'V' if ($elements[$n + 2] ne '');
$c = 'W' if ($elements[$n + 2] =~ /^\s/);
$c = 'C' if ($elements[$n + 2] =~ /^$;/);
$c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
$c = 'O' if ($elements[$n + 2] eq '');
$c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
} else {
$c = 'E';
}
my $ctx = "${a}x${c}";
my $at = "(ctx:$ctx)";
my $ptr = substr($blank, 0, $off) . "^";
my $hereptr = "$hereline$ptr\n";
# Pull out the value of this operator.
my $op_type = substr($curr_values, $off + 1, 1);
# Get the full operator variant.
my $opv = $op . substr($curr_vars, $off, 1);
# Ignore operators passed as parameters.
if ($op_type ne 'V' &&
$ca =~ /\s$/ && $cc =~ /^\s*,/) {
# # Ignore comments
# } elsif ($op =~ /^$;+$/) {
# ; should have either the end of line or a space or \ after it
} elsif ($op eq ';') {
if ($ctx !~ /.x[WEBC]/ &&
$cc !~ /^\\/ && $cc !~ /^;/) {
ERROR("SPACING",
"space required after that '$op' $at\n" . $hereptr);
}
# // is a comment
} elsif ($op eq '//') {
# No spaces for:
# ->
# : when part of a bitfield
} elsif ($op eq '->' || $opv eq ':B') {
if ($ctx =~ /Wx.|.xW/) {
ERROR("SPACING",
"spaces prohibited around that '$op' $at\n" . $hereptr);
}
# , must have a space on the right.
} elsif ($op eq ',') {
if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
ERROR("SPACING",
"space required after that '$op' $at\n" . $hereptr);
}
# '*' as part of a type definition -- reported already.
} elsif ($opv eq '*_') {
#warn "'*' is part of type\n";
# unary operators should have a space before and
# none after. May be left adjacent to another
# unary operator, or a cast
} elsif ($op eq '!' || $op eq '~' ||
$opv eq '*U' || $opv eq '-U' ||
$opv eq '&U' || $opv eq '&&U') {
if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
ERROR("SPACING",
"space required before that '$op' $at\n" . $hereptr);
}
if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
# A unary '*' may be const
} elsif ($ctx =~ /.xW/) {
ERROR("SPACING",
"space prohibited after that '$op' $at\n" . $hereptr);
}
# unary ++ and unary -- are allowed no space on one side.
} elsif ($op eq '++' or $op eq '--') {
if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
ERROR("SPACING",
"space required one side of that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /Wx[BE]/ ||
($ctx =~ /Wx./ && $cc =~ /^;/)) {
ERROR("SPACING",
"space prohibited before that '$op' $at\n" . $hereptr);
}
if ($ctx =~ /ExW/) {
ERROR("SPACING",
"space prohibited after that '$op' $at\n" . $hereptr);
}
# << and >> may either have or not have spaces both sides
} elsif ($op eq '<<' or $op eq '>>' or
$op eq '&' or $op eq '^' or $op eq '|' or
$op eq '+' or $op eq '-' or
$op eq '*' or $op eq '/' or
$op eq '%')
{
if ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
ERROR("SPACING",
"need consistent spacing around '$op' $at\n" .
$hereptr);
}
# A colon needs no spaces before when it is
# terminating a case value or a label.
} elsif ($opv eq ':C' || $opv eq ':L') {
if ($ctx =~ /Wx./) {
ERROR("SPACING",
"space prohibited before that '$op' $at\n" . $hereptr);
}
# All the others need spaces both sides.
} elsif ($ctx !~ /[EWC]x[CWE]/) {
my $ok = 0;
# Ignore email addresses <foo@bar>
if (($op eq '<' &&
$cc =~ /^\S+\@\S+>/) ||
($op eq '>' &&
$ca =~ /<\S+\@\S+$/))
{
$ok = 1;
}
# Ignore ?:
if (($opv eq ':O' && $ca =~ /\?$/) ||
($op eq '?' && $cc =~ /^:/)) {
$ok = 1;
}
if ($ok == 0) {
ERROR("SPACING",
"spaces required around that '$op' $at\n" . $hereptr);
}
}
$off += length($elements[$n + 1]);
}
}
# check for multiple assignments
if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
CHK("MULTIPLE_ASSIGNMENTS",
"multiple assignments should be avoided\n" . $herecurr);
}
## # check for multiple declarations, allowing for a function declaration
## # continuation.
## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
##
## # Remove any bracketed sections to ensure we do not
## # falsly report the parameters of functions.
## my $ln = $line;
## while ($ln =~ s/\([^\(\)]*\)//g) {
## }
## if ($ln =~ /,/) {
## WARN("MULTIPLE_DECLARATION",
## "declaring multiple variables together should be avoided\n" . $herecurr);
## }
## }
#need space before brace following if, while, etc
if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
$line =~ /do{/) {
ERROR("SPACING",
"space required before the open brace '{'\n" . $herecurr);
}
# closing brace should have a space following it when it has anything
# on the line
if ($line =~ /}(?!(?:,|;|\)))\S/) {
ERROR("SPACING",
"space required after that close brace '}'\n" . $herecurr);
}
# check spacing on square brackets
if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
ERROR("SPACING",
"space prohibited after that open square bracket '['\n" . $herecurr);
}
if ($line =~ /\s\]/) {
ERROR("SPACING",
"space prohibited before that close square bracket ']'\n" . $herecurr);
}
# check spacing on parentheses
if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
$line !~ /for\s*\(\s+;/) {
ERROR("SPACING",
"space prohibited after that open parenthesis '('\n" . $herecurr);
}
if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
$line !~ /for\s*\(.*;\s+\)/ &&
$line !~ /:\s+\)/) {
ERROR("SPACING",
"space prohibited before that close parenthesis ')'\n" . $herecurr);
}
#goto labels aren't indented, allow a single space however
if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
!($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
WARN("INDENTED_LABEL",
"labels should not be indented\n" . $herecurr);
}
# Return is not a function.
if (defined($stat) && $stat =~ /^.\s*return(\s*)(\(.*);/s) {
my $spacing = $1;
my $value = $2;
# Flatten any parentheses
$value =~ s/\(/ \(/g;
$value =~ s/\)/\) /g;
while ($value =~ s/\[[^\[\]]*\]/1/ ||
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$value !~ /(?:$Ident|-?$Constant)\s*
$Compare\s*
(?:$Ident|-?$Constant)/x &&
$value =~ s/\([^\(\)]*\)/1/) {
}
#print "value<$value>\n";
if ($value =~ /^\s*(?:$Ident|-?$Constant)\s*$/) {
ERROR("RETURN_PARENTHESES",
"return is not a function, parentheses are not required\n" . $herecurr);
} elsif ($spacing !~ /\s+/) {
ERROR("SPACING",
"space required before the open parenthesis '('\n" . $herecurr);
}
}
# Return of what appears to be an errno should normally be -'ve
if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
my $name = $1;
if ($name ne 'EOF' && $name ne 'ERROR') {
WARN("USE_NEGATIVE_ERRNO",
"return of an errno should typically be -ve (return -$1)\n" . $herecurr);
}
}
# Need a space before open parenthesis after if, while etc
if ($line=~/\b(if|while|for|switch)\(/) {
ERROR("SPACING", "space required before the open parenthesis '('\n" . $herecurr);
}
# Check for illegal assignment in if conditional -- and check for trailing
# statements after the conditional.
if ($line =~ /do\s*(?!{)/) {
($stat, $cond, $line_nr_next, $remain_next, $off_next) =
ctx_statement_block($linenr, $realcnt, 0)
if (!defined $stat);
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my ($stat_next) = ctx_statement_block($line_nr_next,
$remain_next, $off_next);
$stat_next =~ s/\n./\n /g;
##print "stat<$stat> stat_next<$stat_next>\n";
if ($stat_next =~ /^\s*while\b/) {
# If the statement carries leading newlines,
# then count those as offsets.
my ($whitespace) =
($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
my $offset =
statement_rawlines($whitespace) - 1;
$suppress_whiletrailers{$line_nr_next +
$offset} = 1;
}
}
if (!defined $suppress_whiletrailers{$linenr} &&
$line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
my ($s, $c) = ($stat, $cond);
if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
ERROR("ASSIGN_IN_IF",
"do not use assignment in if condition\n" . $herecurr);
}
# Find out what is on the end of the line after the
# conditional.
substr($s, 0, length($c), '');
$s =~ s/\n.*//g;
$s =~ s/$;//g; # Remove any comments
if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
$c !~ /}\s*while\s*/)
{
# Find out how long the conditional actually is.
my @newlines = ($c =~ /\n/gs);
my $cond_lines = 1 + $#newlines;
my $stat_real = '';
$stat_real = raw_line($linenr, $cond_lines)
. "\n" if ($cond_lines);
if (defined($stat_real) && $cond_lines > 1) {
$stat_real = "[...]\n$stat_real";
}
ERROR("TRAILING_STATEMENTS",
"trailing statements should be on next line\n" . $herecurr . $stat_real);
}
}
# Check for bitwise tests written as boolean
if ($line =~ /
(?:
(?:\[|\(|\&\&|\|\|)
\s*0[xX][0-9]+\s*
(?:\&\&|\|\|)
|
(?:\&\&|\|\|)
\s*0[xX][0-9]+\s*
(?:\&\&|\|\||\)|\])
)/x)
{
WARN("HEXADECIMAL_BOOLEAN_TEST",
"boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
}
# if and else should not have general statements after it
if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
my $s = $1;
$s =~ s/$;//g; # Remove any comments
if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
ERROR("TRAILING_STATEMENTS",
"trailing statements should be on next line\n" . $herecurr);
}
}
# if should not continue a brace
if ($line =~ /}\s*if\b/) {
ERROR("TRAILING_STATEMENTS",
"trailing statements should be on next line\n" .
$herecurr);
}
# case and default should not have general statements after them
if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
$line !~ /\G(?:
(?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
\s*return\s+
)/xg)
{
ERROR("TRAILING_STATEMENTS",
"trailing statements should be on next line\n" . $herecurr);
}
# Check for }<nl>else {, these must be at the same
# indent level to be relevant to each other.
if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ and
$previndent == $indent) {
ERROR("ELSE_AFTER_BRACE",
"else should follow close brace '}'\n" . $hereprev);
}
if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ and
$previndent == $indent) {
my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
# Find out what is on the end of the line after the
# conditional.
substr($s, 0, length($c), '');
$s =~ s/\n.*//g;
if ($s =~ /^\s*;/) {
ERROR("WHILE_AFTER_BRACE",
"while should follow close brace '}'\n" . $hereprev);
}
}
#CamelCase
while ($line =~ m{($Constant|$Lval)}g) {
my $var = $1;
if ($var !~ /$Constant/ &&
$var =~ /[A-Z]\w*[a-z]|[a-z]\w*[A-Z]/ &&
$var !~ /"^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
!defined $camelcase{$var}) {
$camelcase{$var} = 1;
WARN("CAMELCASE",
"Avoid CamelCase: <$var>\n" . $herecurr);
}
}
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#no spaces allowed after \ in define
if ($line=~/\#\s*define.*\\\s$/) {
WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
"Whitepspace after \\ makes next lines useless\n" . $herecurr);
}
#warn if <asm/foo.h> is #included and <linux/foo.h> is available (uses RAW line)
if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
my $file = "$1.h";
my $checkfile = "include/linux/$file";
if (-f "$root/$checkfile" &&
$realfile ne $checkfile &&
$1 !~ /$allowed_asm_includes/)
{
if ($realfile =~ m{^arch/}) {
CHK("ARCH_INCLUDE_LINUX",
"Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
} else {
WARN("INCLUDE_LINUX",
"Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
}
}
}
# multi-statement macros should be enclosed in a do while loop, grab the
# first statement and ensure its the whole macro if its not enclosed
# in a known good container
if ($realfile !~ m@/vmlinux.lds.h$@ &&
$line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
my $ln = $linenr;
my $cnt = $realcnt;
my ($off, $dstat, $dcond, $rest);
my $ctx = '';
($dstat, $dcond, $ln, $cnt, $off) =
ctx_statement_block($linenr, $realcnt, 0);
$ctx = $dstat;
#print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
#print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
$dstat =~ s/^.\s*\#\s*define\s+$Ident(?:\([^\)]*\))?\s*//;
$dstat =~ s/$;//g;
$dstat =~ s/\\\n.//g;
$dstat =~ s/^\s*//s;
$dstat =~ s/\s*$//s;
# Flatten any parentheses and braces
while ($dstat =~ s/\([^\(\)]*\)/1/ ||
$dstat =~ s/\{[^\{\}]*\}/1/ ||
$dstat =~ s/\[[^\[\]]*\]/1/)
{
}
# Flatten any obvious string concatentation.
while ($dstat =~ s/("X*")\s*$Ident/$1/ ||
$dstat =~ s/$Ident\s*("X*")/$1/)