mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 21:23:58 +01:00
81d16d8d0c
We need this so we can declare function pointers returning bool without upsetting our style checker. :/
240 lines
8.1 KiB
Perl
Executable File
240 lines
8.1 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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use warnings;
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my $found = 0;
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sub msg {
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$found = 1;
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print "$_[0]";
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}
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my $C = 0;
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if ($ARGV[0] =~ /^-/) {
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my $lang = shift @ARGV;
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$C = ($lang eq '-C');
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}
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our %basenames = ();
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our %guardnames = ();
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for my $fn (@ARGV) {
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open(F, "$fn");
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my $lastnil = 0;
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my $lastline = "";
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my $incomment = 0;
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my $in_func_head = 0;
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my $basename = $fn;
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$basename =~ s#.*/##;
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if ($basenames{$basename}) {
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msg "Duplicate fnames: $fn and $basenames{$basename}.\n";
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} else {
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$basenames{$basename} = $fn;
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}
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my $isheader = ($fn =~ /\.h/);
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my $seenguard = 0;
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my $guardname = "<none>";
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while (<F>) {
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## Warn about windows-style newlines.
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# (We insist on lines that end with a single LF character, not
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# CR LF.)
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if (/\r/) {
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msg " CR:$fn:$.\n";
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}
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## Warn about tabs.
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# (We only use spaces)
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if (/\t/) {
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msg " TAB:$fn:$.\n";
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}
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## Warn about labels that don't have a space in front of them
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# (We indent every label at least one space)
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if (/^[a-zA-Z_][a-zA-Z_0-9]*:/) {
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msg "nosplabel:$fn:$.\n";
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}
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## Warn about trailing whitespace.
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# (We don't allow whitespace at the end of the line; make your
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# editor highlight it for you so you can stop adding it in.)
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if (/ +$/) {
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msg "Space\@EOL:$fn:$.\n";
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}
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## Warn about control keywords without following space.
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# (We put a space after every 'if', 'while', 'for', 'switch', etc)
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if ($C && /\s(?:if|while|for|switch)\(/) {
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msg " KW(:$fn:$.\n";
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}
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## Warn about #else #if instead of #elif.
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# (We only allow #elif)
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if (($lastline =~ /^\# *else/) and ($_ =~ /^\# *if/)) {
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msg " #else#if:$fn:$.\n";
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}
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## Warn about some K&R violations
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# (We use K&R-style C, where open braces go on the same line as
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# the statement that introduces them. In other words:
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# if (a) {
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# stuff;
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# } else {
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# other stuff;
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# }
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if (/^\s+\{/ and $lastline =~ /^\s*(if|while|for|else if)/ and
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$lastline !~ /\{$/) {
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msg "non-K&R {:$fn:$.\n";
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}
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if (/^\s*else/ and $lastline =~ /\}$/) {
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msg " }\\nelse:$fn:$.\n";
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}
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$lastline = $_;
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## Warn about unnecessary empty lines.
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# (Don't put an empty line before a line that contains nothing
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# but a closing brace.)
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if ($lastnil && /^\s*}\n/) {
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msg " UnnecNL:$fn:$.\n";
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}
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## Warn about multiple empty lines.
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# (At most one blank line in a row.)
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if ($lastnil && /^$/) {
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msg " DoubleNL:$fn:$.\n";
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} elsif (/^$/) {
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$lastnil = 1;
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} else {
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$lastnil = 0;
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}
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## Terminals are still 80 columns wide in my world. I refuse to
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## accept double-line lines.
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# (Don't make lines wider than 80 characters, including newline.)
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if (/^.{80}/) {
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msg " Wide:$fn:$.\n";
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}
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### Juju to skip over comments and strings, since the tests
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### we're about to do are okay there.
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if ($C) {
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if ($incomment) {
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if (m!\*/!) {
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s!.*?\*/!!;
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$incomment = 0;
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} else {
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next;
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}
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}
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if ($isheader) {
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if ($seenguard == 0) {
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if (/ifndef\s+(\S+)/) {
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++$seenguard;
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$guardname = $1;
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}
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} elsif ($seenguard == 1) {
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if (/^\#define (\S+)/) {
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++$seenguard;
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if ($1 ne $guardname) {
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msg "GUARD:$fn:$.: Header guard macro mismatch.\n";
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}
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}
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}
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}
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if (m!/\*.*?\*/!) {
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s!\s*/\*.*?\*/!!;
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} elsif (m!/\*!) {
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s!\s*/\*!!;
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$incomment = 1;
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next;
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}
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s!"(?:[^\"]+|\\.)*"!"X"!g;
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next if /^\#/;
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## Warn about C++-style comments.
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# (Use C style comments only.)
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if (m!//!) {
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# msg " //:$fn:$.\n";
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s!//.*!!;
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}
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## Warn about unquoted braces preceded by non-space.
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# (No character except a space should come before a {)
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if (/([^\s'])\{/) {
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msg " $1\{:$fn:$.\n";
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}
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## Warn about double semi-colons at the end of a line.
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if (/;;$/) {
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msg " double semi-colons at the end of $. in $fn\n"
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}
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## Warn about multiple internal spaces.
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#if (/[^\s,:]\s{2,}[^\s\\=]/) {
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# msg " X X:$fn:$.\n";
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#}
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## Warn about { with stuff after.
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#s/\s+$//;
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#if (/\{[^\}\\]+$/) {
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# msg " {X:$fn:$.\n";
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#}
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## Warn about function calls with space before parens.
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# (Don't put a space between the name of a function and its
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# arguments.)
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if (/(\w+)\s\(([A-Z]*)/) {
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if ($1 ne "if" and $1 ne "while" and $1 ne "for" and
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$1 ne "switch" and $1 ne "return" and $1 ne "int" and
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$1 ne "elsif" and $1 ne "WINAPI" and $2 ne "WINAPI" and
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$1 ne "void" and $1 ne "__attribute__" and $1 ne "op" and
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$1 ne "size_t" and $1 ne "double" and $1 ne "uint64_t" and
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$1 ne "workqueue_reply_t" and $1 ne "bool") {
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msg " fn ():$fn:$.\n";
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}
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}
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## Warn about functions not declared at start of line.
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# (When you're declaring functions, put "static" and "const"
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# and the return type on one line, and the function name at
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# the start of a new line.)
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if ($in_func_head ||
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($fn !~ /\.h$/ && /^[a-zA-Z0-9_]/ &&
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! /^(?:const |static )*(?:typedef|struct|union)[^\(]*$/ &&
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! /= *\{$/ && ! /;$/)) {
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if (/.\{$/){
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msg "fn() {:$fn:$.\n";
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$in_func_head = 0;
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} elsif (/^\S[^\(]* +\**[a-zA-Z0-9_]+\(/) {
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$in_func_head = -1; # started with tp fn
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} elsif (/;$/) {
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$in_func_head = 0;
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} elsif (/\{/) {
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if ($in_func_head == -1) {
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msg "tp fn():$fn:$.\n";
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}
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$in_func_head = 0;
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}
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}
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## Check for forbidden functions except when they are
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# explicitly permitted
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if (/\bassert\(/ && not /assert OK/) {
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msg "assert :$fn:$. (use tor_assert)\n";
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}
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if (/\bmemcmp\(/ && not /memcmp OK/) {
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msg "memcmp :$fn:$. (use {tor,fast}_mem{eq,neq,cmp}\n";
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}
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# always forbidden.
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if (not /\ OVERRIDE\ /) {
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if (/\bstrcat\(/ or /\bstrcpy\(/ or /\bsprintf\(/) {
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msg "$& :$fn:$.\n";
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}
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if (/\bmalloc\(/ or /\bfree\(/ or /\brealloc\(/ or
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/\bstrdup\(/ or /\bstrndup\(/ or /\bcalloc\(/) {
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msg "$& :$fn:$. (use tor_malloc, tor_free, etc)\n";
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}
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}
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}
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}
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if ($isheader && $C) {
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if ($seenguard < 2) {
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msg "$fn:No #ifndef/#define header guard pair found.\n";
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} elsif ($guardnames{$guardname}) {
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msg "$fn:Guard macro $guardname also used in $guardnames{$guardname}\n";
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} else {
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$guardnames{$guardname} = $fn;
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}
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}
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close(F);
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}
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exit $found;
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