mirror of
https://github.com/curl/curl.git
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b5d182d037
Enable strict and warnings mode for checksrc to ensure we aren't missing anything due to bugs in the checking code. This uncovered a few things which are all fixed in this commit: * several variables were used uninitialized * several variables were not defined in the correct scope * the whitelist filehandle was read even if the file didn't exist * the enable_warn() call when a disable counter had expired was passing incorrect variables, but since the checkwarn() call is unlikely to hit (the counter is only decremented to zero on actual ignores) it didn't manifest a problem. Closes #3090 Reviewed-by: Daniel Stenberg <daniel@haxx.se> Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>
640 lines
20 KiB
Perl
Executable File
640 lines
20 KiB
Perl
Executable File
#!/usr/bin/env perl
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) 2011 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.haxx.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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###########################################################################
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use strict;
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use warnings;
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my $max_column = 79;
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my $indent = 2;
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my $warnings = 0;
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my $swarnings = 0;
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my $errors = 0;
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my $serrors = 0;
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my $suppressed; # whitelisted problems
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my $file;
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my $dir=".";
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my $wlist="";
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my $windows_os = $^O eq 'MSWin32' || $^O eq 'msys' || $^O eq 'cygwin';
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my $verbose;
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my %whitelist;
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my %ignore;
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my %ignore_set;
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my %ignore_used;
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my @ignore_line;
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my %warnings = (
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'LONGLINE' => "Line longer than $max_column",
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'TABS' => 'TAB characters not allowed',
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'TRAILINGSPACE' => 'Trailing white space on the line',
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'CPPCOMMENTS' => '// comment detected',
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'SPACEBEFOREPAREN' => 'space before an open parenthesis',
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'SPACEAFTERPAREN' => 'space after open parenthesis',
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'SPACEBEFORECLOSE' => 'space before a close parenthesis',
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'SPACEBEFORECOMMA' => 'space before a comma',
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'RETURNNOSPACE' => 'return without space',
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'COMMANOSPACE' => 'comma without following space',
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'BRACEELSE' => '} else on the same line',
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'PARENBRACE' => '){ without sufficient space',
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'SPACESEMICOLON' => 'space before semicolon',
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'BANNEDFUNC' => 'a banned function was used',
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'FOPENMODE' => 'fopen needs a macro for the mode string',
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'BRACEPOS' => 'wrong position for an open brace',
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'INDENTATION' => 'wrong start column for code',
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'COPYRIGHT' => 'file missing a copyright statement',
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'BADCOMMAND' => 'bad !checksrc! instruction',
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'UNUSEDIGNORE' => 'a warning ignore was not used',
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'OPENCOMMENT' => 'file ended with a /* comment still "open"',
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'ASTERISKSPACE' => 'pointer declared with space after asterisk',
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'ASTERISKNOSPACE' => 'pointer declared without space before asterisk',
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'ASSIGNWITHINCONDITION' => 'assignment within conditional expression',
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'EQUALSNOSPACE' => 'equals sign without following space',
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'NOSPACEEQUALS' => 'equals sign without preceding space',
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'SEMINOSPACE' => 'semicolon without following space',
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'MULTISPACE' => 'multiple spaces used when not suitable',
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'SIZEOFNOPAREN' => 'use of sizeof without parentheses',
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);
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sub readwhitelist {
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open(W, "<$dir/checksrc.whitelist") or return;
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my @all=<W>;
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for(@all) {
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$windows_os ? $_ =~ s/\r?\n$// : chomp;
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$whitelist{$_}=1;
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}
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close(W);
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}
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sub checkwarn {
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my ($name, $num, $col, $file, $line, $msg, $error) = @_;
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my $w=$error?"error":"warning";
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my $nowarn=0;
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#if(!$warnings{$name}) {
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# print STDERR "Dev! there's no description for $name!\n";
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#}
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# checksrc.whitelist
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if($whitelist{$line}) {
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$nowarn = 1;
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}
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# !checksrc! controlled
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elsif($ignore{$name}) {
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$ignore{$name}--;
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$ignore_used{$name}++;
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$nowarn = 1;
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if(!$ignore{$name}) {
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# reached zero, enable again
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enable_warn($name, $num, $file, $line);
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}
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}
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if($nowarn) {
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$suppressed++;
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if($w) {
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$swarnings++;
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}
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else {
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$serrors++;
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}
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return;
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}
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if($w) {
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$warnings++;
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}
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else {
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$errors++;
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}
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$col++;
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print "$file:$num:$col: $w: $msg ($name)\n";
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print " $line\n";
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if($col < 80) {
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my $pref = (' ' x $col);
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print "${pref}^\n";
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}
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}
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$file = shift @ARGV;
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while(1) {
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if($file =~ /-D(.*)/) {
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$dir = $1;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-W(.*)/) {
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$wlist .= " $1 ";
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-i([1-9])/) {
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$indent = $1 + 0;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /-m([0-9]+)/) {
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$max_column = $1 + 0;
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$file = shift @ARGV;
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next;
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}
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elsif($file =~ /^(-h|--help)/) {
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undef $file;
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last;
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}
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last;
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}
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if(!$file) {
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print "checksrc.pl [option] <file1> [file2] ...\n";
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print " Options:\n";
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print " -D[DIR] Directory to prepend file names\n";
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print " -h Show help output\n";
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print " -W[file] Whitelist the given file - ignore all its flaws\n";
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print " -i<n> Indent spaces. Default: 2\n";
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print " -m<n> Maximum line length. Default: 79\n";
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print "\nDetects and warns for these problems:\n";
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for(sort keys %warnings) {
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printf (" %-18s: %s\n", $_, $warnings{$_});
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}
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exit;
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}
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readwhitelist();
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do {
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if("$wlist" !~ / $file /) {
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my $fullname = $file;
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$fullname = "$dir/$file" if ($fullname !~ '^\.?\.?/');
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scanfile($fullname);
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}
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$file = shift @ARGV;
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} while($file);
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sub checksrc_clear {
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undef %ignore;
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undef %ignore_set;
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undef @ignore_line;
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}
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sub checksrc_endoffile {
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my ($file) = @_;
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for(keys %ignore_set) {
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if($ignore_set{$_} && !$ignore_used{$_}) {
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checkwarn("UNUSEDIGNORE", $ignore_set{$_},
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length($_)+11, $file,
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$ignore_line[$ignore_set{$_}],
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"Unused ignore: $_");
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}
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}
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}
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sub enable_warn {
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my ($what, $line, $file, $l) = @_;
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# switch it back on, but warn if not triggered!
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if(!$ignore_used{$what}) {
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checkwarn("UNUSEDIGNORE",
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$line, length($what) + 11, $file, $l,
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"No warning was inhibited!");
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}
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$ignore_set{$what}=0;
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$ignore_used{$what}=0;
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$ignore{$what}=0;
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}
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sub checksrc {
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my ($cmd, $line, $file, $l) = @_;
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if($cmd =~ / *([^ ]*) *(.*)/) {
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my ($enable, $what) = ($1, $2);
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$what =~ s: *\*/$::; # cut off end of C comment
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# print "ENABLE $enable WHAT $what\n";
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if($enable eq "disable") {
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my ($warn, $scope)=($1, $2);
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if($what =~ /([^ ]*) +(.*)/) {
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($warn, $scope)=($1, $2);
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}
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else {
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$warn = $what;
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$scope = 1;
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}
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# print "IGNORE $warn for SCOPE $scope\n";
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if($scope eq "all") {
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$scope=999999;
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}
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if($ignore_set{$warn}) {
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checkwarn("BADCOMMAND",
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$line, 0, $file, $l,
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"$warn already disabled from line $ignore_set{$warn}");
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}
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else {
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$ignore{$warn}=$scope;
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$ignore_set{$warn}=$line;
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$ignore_line[$line]=$l;
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}
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}
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elsif($enable eq "enable") {
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enable_warn($what, $line, $file, $l);
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}
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else {
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checkwarn("BADCOMMAND",
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$line, 0, $file, $l,
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"Illegal !checksrc! command");
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}
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}
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}
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sub nostrings {
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my ($str) = @_;
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$str =~ s/\".*\"//g;
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return $str;
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}
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sub scanfile {
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my ($file) = @_;
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my $line = 1;
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my $prevl="";
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my $l;
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open(R, "<$file") || die "failed to open $file";
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my $incomment=0;
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my $copyright=0;
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checksrc_clear(); # for file based ignores
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while(<R>) {
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$windows_os ? $_ =~ s/\r?\n$// : chomp;
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my $l = $_;
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my $ol = $l; # keep the unmodified line for error reporting
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my $column = 0;
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# check for !checksrc! commands
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if($l =~ /\!checksrc\! (.*)/) {
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my $cmd = $1;
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checksrc($cmd, $line, $file, $l)
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}
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# check for a copyright statement
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if(!$copyright && ($l =~ /copyright .* \d\d\d\d/i)) {
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$copyright=1;
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}
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# detect long lines
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if(length($l) > $max_column) {
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checkwarn("LONGLINE", $line, length($l), $file, $l,
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"Longer than $max_column columns");
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}
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# detect TAB characters
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if($l =~ /^(.*)\t/) {
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checkwarn("TABS",
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$line, length($1), $file, $l, "Contains TAB character", 1);
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}
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# detect trailing white space
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if($l =~ /^(.*)[ \t]+\z/) {
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checkwarn("TRAILINGSPACE",
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$line, length($1), $file, $l, "Trailing whitespace");
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}
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# ------------------------------------------------------------
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# Above this marker, the checks were done on lines *including*
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# comments
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# ------------------------------------------------------------
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# strip off C89 comments
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comment:
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if(!$incomment) {
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if($l =~ s/\/\*.*\*\// /g) {
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# full /* comments */ were removed!
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}
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if($l =~ s/\/\*.*//) {
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# start of /* comment was removed
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$incomment = 1;
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}
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}
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else {
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if($l =~ s/.*\*\///) {
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# end of comment */ was removed
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$incomment = 0;
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goto comment;
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}
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else {
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# still within a comment
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$l="";
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}
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}
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# ------------------------------------------------------------
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# Below this marker, the checks were done on lines *without*
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# comments
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# ------------------------------------------------------------
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# crude attempt to detect // comments without too many false
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# positives
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if($l =~ /^([^"\*]*)[^:"]\/\//) {
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checkwarn("CPPCOMMENTS",
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$line, length($1), $file, $l, "\/\/ comment");
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}
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my $nostr = nostrings($l);
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# check spaces after for/if/while/function call
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if($nostr =~ /^(.*)(for|if|while| ([a-zA-Z0-9_]+)) \((.)/) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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elsif(defined $3 && $3 eq "return") {
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# return must have a space
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}
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elsif(defined $3 && $3 eq "case") {
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# case must have a space
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}
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elsif($4 eq "*") {
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# (* beginning makes the space OK!
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}
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elsif($1 =~ / *typedef/) {
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# typedefs can use space-paren
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}
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else {
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checkwarn("SPACEBEFOREPAREN", $line, length($1)+length($2), $file, $l,
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"$2 with space");
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}
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}
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if($nostr =~ /^((.*)(if) *\()(.*)\)/) {
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my $pos = length($1);
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if($4 =~ / = /) {
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checkwarn("ASSIGNWITHINCONDITION",
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$line, $pos+1, $file, $l,
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"assignment within conditional expression");
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}
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}
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# check spaces after open parentheses
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if($l =~ /^(.*[a-z])\( /i) {
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checkwarn("SPACEAFTERPAREN",
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$line, length($1)+1, $file, $l,
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"space after open parenthesis");
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}
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# check spaces before close parentheses, unless it was a space or a
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# close parenthesis!
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if($l =~ /(.*[^\) ]) \)/) {
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checkwarn("SPACEBEFORECLOSE",
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$line, length($1)+1, $file, $l,
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"space before close parenthesis");
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}
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# check spaces before comma!
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if($l =~ /(.*[^ ]) ,/) {
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checkwarn("SPACEBEFORECOMMA",
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$line, length($1)+1, $file, $l,
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"space before comma");
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}
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# check for "return(" without space
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if($l =~ /^(.*)return\(/) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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else {
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checkwarn("RETURNNOSPACE", $line, length($1)+6, $file, $l,
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"return without space before paren");
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}
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}
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# check for "sizeof" without parenthesis
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if(($l =~ /^(.*)sizeof *([ (])/) && ($2 ne "(")) {
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if($1 =~ / *\#/) {
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# this is a #if, treat it differently
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}
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else {
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checkwarn("SIZEOFNOPAREN", $line, length($1)+6, $file, $l,
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"sizeof without parenthesis");
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}
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}
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# check for comma without space
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if($l =~ /^(.*),[^ \n]/) {
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my $pref=$1;
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my $ign=0;
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if($pref =~ / *\#/) {
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# this is a #if, treat it differently
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$ign=1;
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}
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elsif($pref =~ /\/\*/) {
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# this is a comment
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$ign=1;
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}
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elsif($pref =~ /[\"\']/) {
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$ign = 1;
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# There is a quote here, figure out whether the comma is
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# within a string or '' or not.
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if($pref =~ /\"/) {
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# within a string
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}
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elsif($pref =~ /\'$/) {
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# a single letter
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}
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else {
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$ign = 0;
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}
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}
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if(!$ign) {
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checkwarn("COMMANOSPACE", $line, length($pref)+1, $file, $l,
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"comma without following space");
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}
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}
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# check for "} else"
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if($l =~ /^(.*)\} *else/) {
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checkwarn("BRACEELSE",
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$line, length($1), $file, $l, "else after closing brace on same line");
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}
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# check for "){"
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if($l =~ /^(.*)\)\{/) {
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checkwarn("PARENBRACE",
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$line, length($1)+1, $file, $l, "missing space after close paren");
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}
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# check for space before the semicolon last in a line
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if($l =~ /^(.*[^ ].*) ;$/) {
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checkwarn("SPACESEMICOLON",
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$line, length($1), $file, $ol, "space before last semicolon");
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}
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# scan for use of banned functions
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if($l =~ /^(.*\W)
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(gets|
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strtok|
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v?sprintf|
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(str|_mbs|_tcs|_wcs)n?cat|
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LoadLibrary(Ex)?(A|W)?)
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\s*\(
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/x) {
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checkwarn("BANNEDFUNC",
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$line, length($1), $file, $ol,
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"use of $2 is banned");
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}
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# scan for use of non-binary fopen without the macro
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if($l =~ /^(.*\W)fopen\s*\([^,]*, *\"([^"]*)/) {
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my $mode = $2;
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if($mode !~ /b/) {
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checkwarn("FOPENMODE",
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$line, length($1), $file, $ol,
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"use of non-binary fopen without FOPEN_* macro: $mode");
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}
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}
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# check for open brace first on line but not first column
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# only alert if previous line ended with a close paren and wasn't a cpp
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# line
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if((($prevl =~ /\)\z/) && ($prevl !~ /^ *#/)) && ($l =~ /^( +)\{/)) {
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checkwarn("BRACEPOS",
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$line, length($1), $file, $ol, "badly placed open brace");
|
|
}
|
|
|
|
# if the previous line starts with if/while/for AND ends with an open
|
|
# brace, or an else statement, check that this line is indented $indent
|
|
# more steps, if not a cpp line
|
|
if($prevl =~ /^( *)((if|while|for)\(.*\{|else)\z/) {
|
|
my $first = length($1);
|
|
|
|
# this line has some character besides spaces
|
|
if(($l !~ /^ *#/) && ($l =~ /^( *)[^ ]/)) {
|
|
my $second = length($1);
|
|
my $expect = $first+$indent;
|
|
if($expect != $second) {
|
|
my $diff = $second - $first;
|
|
checkwarn("INDENTATION", $line, length($1), $file, $ol,
|
|
"not indented $indent steps (uses $diff)");
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
# check for 'char * name'
|
|
if(($l =~ /(^.*(char|int|long|void|curl_slist|CURL|CURLM|CURLMsg|curl_httppost) *(\*+)) (\w+)/) && ($4 ne "const")) {
|
|
checkwarn("ASTERISKNOSPACE",
|
|
$line, length($1), $file, $ol,
|
|
"no space after declarative asterisk");
|
|
}
|
|
# check for 'char*'
|
|
if(($l =~ /(^.*(char|int|long|void|curl_slist|CURL|CURLM|CURLMsg|curl_httppost|sockaddr_in|FILE)\*)/)) {
|
|
checkwarn("ASTERISKNOSPACE",
|
|
$line, length($1)-1, $file, $ol,
|
|
"no space before asterisk");
|
|
}
|
|
|
|
# check for 'void func() {', but avoid false positives by requiring
|
|
# both an open and closed parentheses before the open brace
|
|
if($l =~ /^((\w).*)\{\z/) {
|
|
my $k = $1;
|
|
$k =~ s/const *//;
|
|
$k =~ s/static *//;
|
|
if($k =~ /\(.*\)/) {
|
|
checkwarn("BRACEPOS",
|
|
$line, length($l)-1, $file, $ol,
|
|
"wrongly placed open brace");
|
|
}
|
|
}
|
|
|
|
# check for equals sign without spaces next to it
|
|
if($nostr =~ /(.*)\=[a-z0-9]/i) {
|
|
checkwarn("EQUALSNOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after equals sign");
|
|
}
|
|
# check for equals sign without spaces before it
|
|
elsif($nostr =~ /(.*)[a-z0-9]\=/i) {
|
|
checkwarn("NOSPACEEQUALS",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space before equals sign");
|
|
}
|
|
|
|
# check for plus signs without spaces next to it
|
|
if($nostr =~ /(.*)[^+]\+[a-z0-9]/i) {
|
|
checkwarn("PLUSNOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after plus sign");
|
|
}
|
|
# check for plus sign without spaces before it
|
|
elsif($nostr =~ /(.*)[a-z0-9]\+[^+]/i) {
|
|
checkwarn("NOSPACEPLUS",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space before plus sign");
|
|
}
|
|
|
|
# check for semicolons without space next to it
|
|
if($nostr =~ /(.*)\;[a-z0-9]/i) {
|
|
checkwarn("SEMINOSPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"no space after semicolon");
|
|
}
|
|
|
|
# check for more than one consecutive space before open brace or
|
|
# question mark. Skip lines containing strings since they make it hard
|
|
# due to artificially getting multiple spaces
|
|
if(($l eq $nostr) &&
|
|
$nostr =~ /^(.*(\S)) + [{?]/i) {
|
|
checkwarn("MULTISPACE",
|
|
$line, length($1)+1, $file, $ol,
|
|
"multiple space");
|
|
print STDERR "L: $l\n";
|
|
print STDERR "nostr: $nostr\n";
|
|
}
|
|
|
|
$line++;
|
|
$prevl = $ol;
|
|
}
|
|
|
|
if(!$copyright) {
|
|
checkwarn("COPYRIGHT", 1, 0, $file, "", "Missing copyright statement", 1);
|
|
}
|
|
if($incomment) {
|
|
checkwarn("OPENCOMMENT", 1, 0, $file, "", "Missing closing comment", 1);
|
|
}
|
|
|
|
checksrc_endoffile($file);
|
|
|
|
close(R);
|
|
|
|
}
|
|
|
|
|
|
if($errors || $warnings || $verbose) {
|
|
printf "checksrc: %d errors and %d warnings\n", $errors, $warnings;
|
|
if($suppressed) {
|
|
printf "checksrc: %d errors and %d warnings suppressed\n",
|
|
$serrors,
|
|
$swarnings;
|
|
}
|
|
exit 5; # return failure
|
|
}
|