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|
#!/usr/bin/perl
use strict;
use warnings;
my $found = 0;
sub msg {
$found = 1;
print "$_[0]";
}
my $C = 0;
if ($ARGV[0] =~ /^-/) {
my $lang = shift @ARGV;
$C = ($lang eq '-C');
}
our %basenames = ();
for my $fn (@ARGV) {
open(F, "$fn");
my $lastnil = 0;
my $lastline = "";
my $incomment = 0;
my $in_func_head = 0;
my $basename = $fn;
$basename =~ s#.*/##;
if ($basenames{$basename}) {
msg "Duplicate fnames: $fn and $basenames{$basename}.\n";
} else {
$basenames{$basename} = $fn;
}
while (<F>) {
## Warn about windows-style newlines.
# (We insist on lines that end with a single LF character, not
# CR LF.)
if (/\r/) {
msg " CR:$fn:$.\n";
}
## Warn about tabs.
# (We only use spaces)
if (/\t/) {
msg " TAB:$fn:$.\n";
}
## Warn about labels that don't have a space in front of them
# (We indent every label at least one space)
if (/^[a-zA-Z_][a-zA-Z_0-9]*:/) {
msg "nosplabel:$fn:$.\n";
}
## Warn about trailing whitespace.
# (We don't allow whitespace at the end of the line; make your
# editor highlight it for you so you can stop adding it in.)
if (/ +$/) {
msg "Space\@EOL:$fn:$.\n";
}
## Warn about control keywords without following space.
# (We put a space after every 'if', 'while', 'for', 'switch', etc)
if ($C && /\s(?:if|while|for|switch)\(/) {
msg " KW(:$fn:$.\n";
}
## Warn about #else #if instead of #elif.
# (We only allow #elif)
if (($lastline =~ /^\# *else/) and ($_ =~ /^\# *if/)) {
msg " #else#if:$fn:$.\n";
}
## Warn about some K&R violations
# (We use K&R-style C, where open braces go on the same line as
# the statement that introduces them. In other words:
# if (a) {
# stuff;
# } else {
# other stuff;
# }
if (/^\s+\{/ and $lastline =~ /^\s*(if|while|for|else if)/ and
$lastline !~ /\{$/) {
msg "non-K&R {:$fn:$.\n";
}
if (/^\s*else/ and $lastline =~ /\}$/) {
msg " }\\nelse:$fn:$.\n";
}
$lastline = $_;
## Warn about unnecessary empty lines.
# (Don't put an empty line before a line that contains nothing
# but a closing brace.)
if ($lastnil && /^\s*}\n/) {
msg " UnnecNL:$fn:$.\n";
}
## Warn about multiple empty lines.
# (At most one blank line in a row.)
if ($lastnil && /^$/) {
msg " DoubleNL:$fn:$.\n";
} elsif (/^$/) {
$lastnil = 1;
} else {
$lastnil = 0;
}
## Terminals are still 80 columns wide in my world. I refuse to
## accept double-line lines.
# (Don't make lines wider than 80 characters, including newline.)
if (/^.{80}/) {
msg " Wide:$fn:$.\n";
}
### Juju to skip over comments and strings, since the tests
### we're about to do are okay there.
if ($C) {
if ($incomment) {
if (m!\*/!) {
s!.*?\*/!!;
$incomment = 0;
} else {
next;
}
}
if (m!/\*.*?\*/!) {
s!\s*/\*.*?\*/!!;
} elsif (m!/\*!) {
s!\s*/\*!!;
$incomment = 1;
next;
}
s!"(?:[^\"]+|\\.)*"!"X"!g;
next if /^\#/;
## Warn about C++-style comments.
# (Use C style comments only.)
if (m!//!) {
# msg " //:$fn:$.\n";
s!//.*!!;
}
## Warn about unquoted braces preceded by non-space.
# (No character except a space should come before a {)
if (/([^\s'])\{/) {
msg " $1\{:$fn:$.\n";
}
## Warn about double semi-colons at the end of a line.
if (/;;$/) {
msg " double semi-colons at the end of $. in $fn\n"
}
## Warn about multiple internal spaces.
#if (/[^\s,:]\s{2,}[^\s\\=]/) {
# msg " X X:$fn:$.\n";
#}
## Warn about { with stuff after.
#s/\s+$//;
#if (/\{[^\}\\]+$/) {
# msg " {X:$fn:$.\n";
#}
## Warn about function calls with space before parens.
# (Don't put a space between the name of a function and its
# arguments.)
if (/(\w+)\s\(([A-Z]*)/) {
if ($1 ne "if" and $1 ne "while" and $1 ne "for" and
$1 ne "switch" and $1 ne "return" and $1 ne "int" and
$1 ne "elsif" and $1 ne "WINAPI" and $2 ne "WINAPI" and
$1 ne "void" and $1 ne "__attribute__" and $1 ne "op" and
$1 ne "size_t" and $1 ne "double" and $1 ne "uint64_t" and
$1 ne "workqueue_reply_t") {
msg " fn ():$fn:$.\n";
}
}
## Warn about functions not declared at start of line.
# (When you're declaring functions, put "static" and "const"
# and the return type on one line, and the function name at
# the start of a new line.)
if ($in_func_head ||
($fn !~ /\.h$/ && /^[a-zA-Z0-9_]/ &&
! /^(?:const |static )*(?:typedef|struct|union)[^\(]*$/ &&
! /= *\{$/ && ! /;$/)) {
if (/.\{$/){
msg "fn() {:$fn:$.\n";
$in_func_head = 0;
} elsif (/^\S[^\(]* +\**[a-zA-Z0-9_]+\(/) {
$in_func_head = -1; # started with tp fn
} elsif (/;$/) {
$in_func_head = 0;
} elsif (/\{/) {
if ($in_func_head == -1) {
msg "tp fn():$fn:$.\n";
}
$in_func_head = 0;
}
}
## Check for forbidden functions except when they are
# explicitly permitted
if (/\bassert\(/ && not /assert OK/) {
msg "assert :$fn:$. (use tor_assert)\n";
}
if (/\bmemcmp\(/ && not /memcmp OK/) {
msg "memcmp :$fn:$. (use {tor,fast}_mem{eq,neq,cmp}\n";
}
# always forbidden.
if (not /\ OVERRIDE\ /) {
if (/\bstrcat\(/ or /\bstrcpy\(/ or /\bsprintf\(/) {
msg "$& :$fn:$.\n";
}
if (/\bmalloc\(/ or /\bfree\(/ or /\brealloc\(/ or
/\bstrdup\(/ or /\bstrndup\(/ or /\bcalloc\(/) {
msg "$& :$fn:$. (use tor_malloc, tor_free, etc)\n";
}
}
}
}
close(F);
}
exit $found;
|
