953 lines
24 KiB
Perl
Executable file
953 lines
24 KiB
Perl
Executable file
#!/usr/bin/env perl
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#
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# CDDL HEADER START
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#
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# The contents of this file are subject to the terms of the
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# Common Development and Distribution License (the "License").
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# You may not use this file except in compliance with the License.
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#
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# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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# or http://www.opensolaris.org/os/licensing.
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# See the License for the specific language governing permissions
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# and limitations under the License.
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#
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# When distributing Covered Code, include this CDDL HEADER in each
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# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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# If applicable, add the following below this CDDL HEADER, with the
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# fields enclosed by brackets "[]" replaced with your own identifying
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# information: Portions Copyright [yyyy] [name of copyright owner]
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#
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# CDDL HEADER END
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#
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#
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# Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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# Use is subject to license terms.
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#
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# Copyright 2011 Joyent, Inc. All rights reserved.
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#
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# jsstyle - check for some common stylistic errors.
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#
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# jsstyle is a sort of "lint" for Javascript coding style. This tool is
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# derived from the cstyle tool, used to check for the style used in the
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# Solaris kernel, sometimes known as "Bill Joy Normal Form".
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#
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# There's a lot this can't check for, like proper indentation of code
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# blocks. There's also a lot more this could check for.
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#
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# A note to the non perl literate:
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#
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# perl regular expressions are pretty much like egrep
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# regular expressions, with the following special symbols
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#
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# \s any space character
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# \S any non-space character
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# \w any "word" character [a-zA-Z0-9_]
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# \W any non-word character
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# \d a digit [0-9]
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# \D a non-digit
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# \b word boundary (between \w and \W)
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# \B non-word boundary
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#
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require 5.0;
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use IO::File;
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use Getopt::Std;
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use strict;
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my $usage =
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"Usage: jsstyle [-h?vcC] [-t <num>] [-f <path>] [-o <config>] file ...
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Check your JavaScript file for style.
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See <https://github.com/davepacheco/jsstyle> for details on config options.
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Report bugs to <https://github.com/davepacheco/jsstyle/issues>.
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Options:
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-h print this help and exit
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-v verbose
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-c check continuation indentation inside functions
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-t specify tab width for line length calculation
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-C don't check anything in header block comments
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-f PATH
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path to a jsstyle config file
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-o OPTION1,OPTION2
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set config options, e.g. '-o doxygen,indent=2'
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";
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my %opts;
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if (!getopts("ch?o:t:f:vC", \%opts)) {
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print $usage;
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exit 2;
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}
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if (defined($opts{'h'}) || defined($opts{'?'})) {
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print $usage;
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exit;
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}
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my $check_continuation = $opts{'c'};
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my $verbose = $opts{'v'};
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my $ignore_hdr_comment = $opts{'C'};
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my $tab_width = $opts{'t'};
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# By default, tabs are 8 characters wide
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if (! defined($opts{'t'})) {
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$tab_width = 8;
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}
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# Load config
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my %config = (
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indent => "tab",
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doxygen => 0, # doxygen comments: /** ... */
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splint => 0, # splint comments. Needed?
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"unparenthesized-return" => 1,
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"literal-string-quote" => "single", # 'single' or 'double'
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"blank-after-start-comment" => 1,
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"continuation-at-front" => 0,
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"leading-right-paren-ok" => 0,
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"strict-indent" => 0
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);
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sub add_config_var ($$) {
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my ($scope, $str) = @_;
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if ($str !~ /^([\w-]+)(?:\s*=\s*(.*?))?$/) {
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die "$scope: invalid option: '$str'";
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}
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my $name = $1;
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my $value = ($2 eq '' ? 1 : $2);
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#print "scope: '$scope', str: '$str', name: '$name', value: '$value'\n";
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# Validate config var.
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if ($name eq "indent") {
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# A number of spaces or "tab".
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if ($value !~ /^\d+$/ && $value ne "tab") {
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die "$scope: invalid '$name': must be a number (of ".
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"spaces) or 'tab'";
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}
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} elsif ($name eq "doxygen" || # boolean vars
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$name eq "splint" ||
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$name eq "unparenthesized-return" ||
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$name eq "continuation-at-front" ||
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$name eq "leading-right-paren-ok" ||
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$name eq "leading-comma-ok" ||
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$name eq "uncuddled-else-ok" ||
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$name eq "whitespace-after-left-paren-ok" ||
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$name eq "strict-indent" ||
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$name eq "blank-after-start-comment") {
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if ($value != 1 && $value != 0) {
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die "$scope: invalid '$name': don't give a value";
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}
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} elsif ($name eq "literal-string-quote") {
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if ($value !~ /single|double/) {
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die "$scope: invalid '$name': must be 'single' ".
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"or 'double'";
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}
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} else {
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die "$scope: unknown config var: $name";
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}
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$config{$name} = $value;
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}
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if (defined($opts{'f'})) {
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my $path = $opts{'f'};
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my $fh = new IO::File $path, "r";
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if (!defined($fh)) {
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die "cannot open config path '$path'";
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}
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my $line = 0;
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while (<$fh>) {
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$line++;
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s/^\s*//; # drop leading space
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s/\s*$//; # drop trailing space
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next if ! $_; # skip empty line
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next if /^#/; # skip comments
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add_config_var "$path:$line", $_;
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}
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}
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if (defined($opts{'o'})) {
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for my $x (split /,/, $opts{'o'}) {
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add_config_var "'-o' option", $x;
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}
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}
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my ($filename, $line, $prev); # shared globals
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my $fmt;
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my $hdr_comment_start;
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if ($verbose) {
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$fmt = "%s: %d: %s\n%s\n";
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} else {
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$fmt = "%s: %d: %s\n";
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}
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if ($config{"doxygen"}) {
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# doxygen comments look like "/*!" or "/**"; allow them.
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$hdr_comment_start = qr/^\s*\/\*[\!\*]?$/;
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} else {
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$hdr_comment_start = qr/^\s*\/\*$/;
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}
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# Note, following must be in single quotes so that \s and \w work right.
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my $lint_re = qr/\/\*(?:
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jsl:\w+?|ARGSUSED[0-9]*|NOTREACHED|LINTLIBRARY|VARARGS[0-9]*|
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CONSTCOND|CONSTANTCOND|CONSTANTCONDITION|EMPTY|
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FALLTHRU|FALLTHROUGH|LINTED.*?|PRINTFLIKE[0-9]*|
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PROTOLIB[0-9]*|SCANFLIKE[0-9]*|JSSTYLED.*?
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)\*\//x;
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my $splint_re = qr/\/\*@.*?@\*\//x;
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my $err_stat = 0; # exit status
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if ($#ARGV >= 0) {
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foreach my $arg (@ARGV) {
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my $fh = new IO::File $arg, "r";
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if (!defined($fh)) {
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printf "%s: cannot open\n", $arg;
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} else {
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&jsstyle($arg, $fh);
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close $fh;
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}
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}
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} else {
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&jsstyle("<stdin>", *STDIN);
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}
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exit $err_stat;
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my $no_errs = 0; # set for JSSTYLED-protected lines
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sub err($) {
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my ($error) = @_;
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unless ($no_errs) {
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printf $fmt, $filename, $., $error, $line;
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$err_stat = 1;
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}
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}
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sub err_prefix($$) {
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my ($prevline, $error) = @_;
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my $out = $prevline."\n".$line;
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unless ($no_errs) {
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printf $fmt, $filename, $., $error, $out;
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$err_stat = 1;
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}
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}
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sub err_prev($) {
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my ($error) = @_;
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unless ($no_errs) {
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printf $fmt, $filename, $. - 1, $error, $prev;
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$err_stat = 1;
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}
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}
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sub jsstyle($$) {
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my ($fn, $filehandle) = @_;
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$filename = $fn; # share it globally
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my $in_cpp = 0;
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my $next_in_cpp = 0;
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my $in_comment = 0;
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my $in_header_comment = 0;
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my $comment_done = 0;
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my $in_function = 0;
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my $in_function_header = 0;
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my $in_declaration = 0;
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my $note_level = 0;
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my $nextok = 0;
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my $nocheck = 0;
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my $in_string = 0;
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my ($okmsg, $comment_prefix);
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$line = '';
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$prev = '';
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reset_indent();
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line: while (<$filehandle>) {
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s/\r?\n$//; # strip return and newline
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# save the original line, then remove all text from within
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# double or single quotes, we do not want to check such text.
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$line = $_;
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#
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# C allows strings to be continued with a backslash at the end of
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# the line. We translate that into a quoted string on the previous
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# line followed by an initial quote on the next line.
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#
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# (we assume that no-one will use backslash-continuation with character
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# constants)
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#
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$_ = '"' . $_ if ($in_string && !$nocheck && !$in_comment);
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#
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# normal strings and characters
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#
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s/'([^\\']|\\.)*'/\'\'/g;
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s/"([^\\"]|\\.)*"/\"\"/g;
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#
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# detect string continuation
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#
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if ($nocheck || $in_comment) {
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$in_string = 0;
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} else {
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#
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# Now that all full strings are replaced with "", we check
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# for unfinished strings continuing onto the next line.
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#
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$in_string =
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(s/([^"](?:"")*)"([^\\"]|\\.)*\\$/$1""/ ||
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s/^("")*"([^\\"]|\\.)*\\$/""/);
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}
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#
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# figure out if we are in a cpp directive
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#
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$in_cpp = $next_in_cpp || /^\s*#/; # continued or started
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$next_in_cpp = $in_cpp && /\\$/; # only if continued
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# strip off trailing backslashes, which appear in long macros
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s/\s*\\$//;
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# an /* END JSSTYLED */ comment ends a no-check block.
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if ($nocheck) {
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if (/\/\* *END *JSSTYLED *\*\//) {
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$nocheck = 0;
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} else {
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reset_indent();
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next line;
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}
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}
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# a /*JSSTYLED*/ comment indicates that the next line is ok.
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if ($nextok) {
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if ($okmsg) {
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err($okmsg);
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}
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$nextok = 0;
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$okmsg = 0;
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if (/\/\* *JSSTYLED.*\*\//) {
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/^.*\/\* *JSSTYLED *(.*) *\*\/.*$/;
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$okmsg = $1;
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$nextok = 1;
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}
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$no_errs = 1;
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} elsif ($no_errs) {
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$no_errs = 0;
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}
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# check length of line.
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# first, a quick check to see if there is any chance of being too long.
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if ((($line =~ tr/\t/\t/) * ($tab_width - 1)) + length($line) > 80) {
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# yes, there is a chance.
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# replace tabs with spaces and check again.
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my $eline = $line;
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1 while $eline =~
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s/\t+/' ' x
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(length($&) * $tab_width - length($`) % $tab_width)/e;
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if (length($eline) > 80) {
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err("line > 80 characters");
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}
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}
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# ignore NOTE(...) annotations (assumes NOTE is on lines by itself).
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if ($note_level || /\b_?NOTE\s*\(/) { # if in NOTE or this is NOTE
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s/[^()]//g; # eliminate all non-parens
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$note_level += s/\(//g - length; # update paren nest level
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next;
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}
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# a /* BEGIN JSSTYLED */ comment starts a no-check block.
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if (/\/\* *BEGIN *JSSTYLED *\*\//) {
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$nocheck = 1;
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}
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# a /*JSSTYLED*/ comment indicates that the next line is ok.
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if (/\/\* *JSSTYLED.*\*\//) {
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/^.*\/\* *JSSTYLED *(.*) *\*\/.*$/;
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$okmsg = $1;
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$nextok = 1;
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}
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if (/\/\/ *JSSTYLED/) {
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/^.*\/\/ *JSSTYLED *(.*)$/;
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$okmsg = $1;
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$nextok = 1;
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}
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# universal checks; apply to everything
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if (/\t +\t/) {
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err("spaces between tabs");
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}
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if (/ \t+ /) {
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err("tabs between spaces");
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}
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if (/\s$/) {
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err("space or tab at end of line");
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}
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if (/[^ \t(]\/\*/ && !/\w\(\/\*.*\*\/\);/) {
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err("comment preceded by non-blank");
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}
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# is this the beginning or ending of a function?
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# (not if "struct foo\n{\n")
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if (/^{$/ && $prev =~ /\)\s*(const\s*)?(\/\*.*\*\/\s*)?\\?$/) {
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$in_function = 1;
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$in_declaration = 1;
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$in_function_header = 0;
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$prev = $line;
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next line;
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}
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if (/^}\s*(\/\*.*\*\/\s*)*$/) {
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if ($prev =~ /^\s*return\s*;/) {
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err_prev("unneeded return at end of function");
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}
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$in_function = 0;
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reset_indent(); # we don't check between functions
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$prev = $line;
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next line;
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}
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if (/^\w*\($/) {
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$in_function_header = 1;
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}
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# a blank line terminates the declarations within a function.
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# XXX - but still a problem in sub-blocks.
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if ($in_declaration && /^$/) {
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$in_declaration = 0;
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}
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if ($comment_done) {
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$in_comment = 0;
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$in_header_comment = 0;
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$comment_done = 0;
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}
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# does this looks like the start of a block comment?
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if (/$hdr_comment_start/) {
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if ($config{"indent"} eq "tab") {
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if (!/^\t*\/\*/) {
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err("block comment not indented by tabs");
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}
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} elsif (!/^ *\/\*/) {
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err("block comment not indented by spaces");
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}
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$in_comment = 1;
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/^(\s*)\//;
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$comment_prefix = $1;
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if ($comment_prefix eq "") {
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$in_header_comment = 1;
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}
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$prev = $line;
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next line;
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}
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# are we still in the block comment?
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if ($in_comment) {
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if (/^$comment_prefix \*\/$/) {
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$comment_done = 1;
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} elsif (/\*\//) {
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$comment_done = 1;
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err("improper block comment close")
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unless ($ignore_hdr_comment && $in_header_comment);
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} elsif (!/^$comment_prefix \*[ \t]/ &&
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!/^$comment_prefix \*$/) {
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err("improper block comment")
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unless ($ignore_hdr_comment && $in_header_comment);
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}
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}
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if ($in_header_comment && $ignore_hdr_comment) {
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$prev = $line;
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next line;
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}
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# check for errors that might occur in comments and in code.
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# allow spaces to be used to draw pictures in header comments.
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#if (/[^ ] / && !/".* .*"/ && !$in_header_comment) {
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# err("spaces instead of tabs");
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#}
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#if (/^ / && !/^ \*[ \t\/]/ && !/^ \*$/ &&
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# (!/^ \w/ || $in_function != 0)) {
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# err("indent by spaces instead of tabs");
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#}
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if ($config{"indent"} eq "tab") {
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if (/^ {2,}/ && !/^ [^ ]/) {
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err("indent by spaces instead of tabs");
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}
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} elsif (/^\t/) {
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err("indent by tabs instead of spaces")
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} elsif (/^( +)/ && !$in_comment) {
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my $indent = $1;
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if (length($indent) < $config{"indent"}) {
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err("indent of " . length($indent) .
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" space(s) instead of " . $config{"indent"});
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} elsif ($config{"strict-indent"} &&
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length($indent) % $config{"indent"} != 0) {
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err("indent is " . length($indent) .
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" not a multiple of " . $config{'indent'} . " spaces");
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}
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}
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if (/^\t+ [^ \t\*]/ || /^\t+ \S/ || /^\t+ \S/) {
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err("continuation line not indented by 4 spaces");
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}
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# A multi-line block comment must not have content on the first line.
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if (/^\s*\/\*./ && !/^\s*\/\*.*\*\// && !/$hdr_comment_start/) {
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err("improper first line of block comment");
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}
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if ($in_comment) { # still in comment, don't do further checks
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$prev = $line;
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next line;
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}
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if ((/[^(]\/\*\S/ || /^\/\*\S/) &&
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!(/$lint_re/ || ($config{"splint"} && /$splint_re/))) {
|
||
err("missing blank after open comment");
|
||
}
|
||
if (/\S\*\/[^)]|\S\*\/$/ &&
|
||
!(/$lint_re/ || ($config{"splint"} && /$splint_re/))) {
|
||
err("missing blank before close comment");
|
||
}
|
||
if ($config{"blank-after-start-comment"} && /(?<!\w:)\/\/\S/) { # C++ comments
|
||
err("missing blank after start comment");
|
||
}
|
||
# check for unterminated single line comments, but allow them when
|
||
# they are used to comment out the argument list of a function
|
||
# declaration.
|
||
if (/\S.*\/\*/ && !/\S.*\/\*.*\*\// && !/\(\/\*/) {
|
||
err("unterminated single line comment");
|
||
}
|
||
|
||
if (/^(#else|#endif|#include)(.*)$/) {
|
||
$prev = $line;
|
||
next line;
|
||
}
|
||
|
||
#
|
||
# delete any comments and check everything else. Note that
|
||
# ".*?" is a non-greedy match, so that we don't get confused by
|
||
# multiple comments on the same line.
|
||
#
|
||
s/\/\*.*?\*\///g;
|
||
s/\/\/.*$//; # C++ comments
|
||
|
||
# delete any trailing whitespace; we have already checked for that.
|
||
s/\s*$//;
|
||
|
||
# following checks do not apply to text in comments.
|
||
my $quote = $config{"literal-string-quote"};
|
||
if ($quote eq "single") {
|
||
if (/"/) {
|
||
err("literal string using double-quote instead of single");
|
||
}
|
||
} elsif ($quote eq "double") {
|
||
if (/'/) {
|
||
err("literal string using single-quote instead of double");
|
||
}
|
||
}
|
||
|
||
if (/[^=!<>\s][!<>=]=/ || /[^<>!=][!<>=]==?[^\s,=]/ ||
|
||
(/[^->]>[^,=>\s]/ && !/[^->]>$/) ||
|
||
(/[^<]<[^,=<\s]/ && !/[^<]<$/) ||
|
||
/[^<\s]<[^<]/ || /[^->\s]>[^>]/) {
|
||
err("missing space around relational operator");
|
||
}
|
||
if (/\S>>=/ || /\S<<=/ || />>=\S/ || /<<=\S/ || /\S[-+*\/&|^%]=/ ||
|
||
(/[^-+*\/&|^%!<>=\s]=[^=]/ && !/[^-+*\/&|^%!<>=\s]=$/) ||
|
||
(/[^!<>=]=[^=\s]/ && !/[^!<>=]=$/)) {
|
||
# XXX - should only check this for C++ code
|
||
# XXX - there are probably other forms that should be allowed
|
||
if (!/\soperator=/) {
|
||
err("missing space around assignment operator");
|
||
}
|
||
}
|
||
if (/[,;]\S/ && !/\bfor \(;;\)/ &&
|
||
# Allow a comma in a regex quantifier.
|
||
!/\/.*?\{\d+,?\d*\}.*?\//) {
|
||
err("comma or semicolon followed by non-blank");
|
||
}
|
||
# check for commas preceded by blanks
|
||
if ((!$config{"leading-comma-ok"} && /^\s*,/) || (!/^\s*,/ && /\s,/)) {
|
||
err("comma preceded by blank");
|
||
}
|
||
# check for semicolons preceded by blanks
|
||
# allow "for" statements to have empty "while" clauses
|
||
if (/\s;/ && !/^[\t]+;$/ && !/^\s*for \([^;]*; ;[^;]*\)/) {
|
||
err("semicolon preceded by blank");
|
||
}
|
||
if (!$config{"continuation-at-front"} && /^\s*(&&|\|\|)/) {
|
||
err("improper boolean continuation");
|
||
} elsif ($config{"continuation-at-front"} && /(&&|\|\||\+)$/) {
|
||
err("improper continuation");
|
||
}
|
||
if (/\S *(&&|\|\|)/ || /(&&|\|\|) *\S/) {
|
||
err("more than one space around boolean operator");
|
||
}
|
||
# We allow methods which look like obj.delete() but not keywords without
|
||
# spaces ala: delete(obj)
|
||
if (/(?<!\.)\b(delete|typeof|instanceof|throw|with|catch|new|function|in|for|if|while|switch|return|case)\(/) {
|
||
err("missing space between keyword and paren");
|
||
}
|
||
if (/(\b(catch|for|if|with|while|switch|return)\b.*){2,}/) {
|
||
# multiple "case" and "sizeof" allowed
|
||
err("more than one keyword on line");
|
||
}
|
||
if (/\b(delete|typeof|instanceOf|with|throw|catch|new|function|in|for|if|while|switch|return|case)\s\s+\(/ &&
|
||
!/^#if\s+\(/) {
|
||
err("extra space between keyword and paren");
|
||
}
|
||
# try to detect "func (x)" but not "if (x)" or
|
||
# "#define foo (x)" or "int (*func)();"
|
||
if (/\w\s\(/) {
|
||
my $s = $_;
|
||
# strip off all keywords on the line
|
||
s/\b(delete|typeof|instanceOf|throw|with|catch|new|function|in|for|if|while|switch|return|case)\s\(/XXX(/g;
|
||
s/#elif\s\(/XXX(/g;
|
||
s/^#define\s+\w+\s+\(/XXX(/;
|
||
# do not match things like "void (*f)();"
|
||
# or "typedef void (func_t)();"
|
||
s/\w\s\(+\*/XXX(*/g;
|
||
s/\b(void)\s+\(+/XXX(/og;
|
||
if (/\w\s\(/) {
|
||
err("extra space between function name and left paren");
|
||
}
|
||
$_ = $s;
|
||
}
|
||
|
||
if ($config{"unparenthesized-return"} &&
|
||
/^\s*return\W[^;]*;/ && !/^\s*return\s*\(.*\);/) {
|
||
err("unparenthesized return expression");
|
||
}
|
||
if (/\btypeof\b/ && !/\btypeof\s*\(.*\)/) {
|
||
err("unparenthesized typeof expression");
|
||
}
|
||
if (!$config{"whitespace-after-left-paren-ok"} && /\(\s/) {
|
||
err("whitespace after left paren");
|
||
}
|
||
# allow "for" statements to have empty "continue" clauses
|
||
if (/\s\)/ && !/^\s*for \([^;]*;[^;]*; \)/) {
|
||
if ($config{"leading-right-paren-ok"} && /^\s+\)/) {
|
||
# this is allowed
|
||
} else {
|
||
err("whitespace before right paren");
|
||
}
|
||
}
|
||
if (/^\s*\(void\)[^ ]/) {
|
||
err("missing space after (void) cast");
|
||
}
|
||
if (/\S{/ && !/({|\(){/ &&
|
||
# Allow a brace in a regex quantifier.
|
||
!/\/.*?\{\d+,?\d*\}.*?\//) {
|
||
err("missing space before left brace");
|
||
}
|
||
if ($in_function && /^\s+{/ &&
|
||
($prev =~ /\)\s*$/ || $prev =~ /\bstruct\s+\w+$/)) {
|
||
err("left brace starting a line");
|
||
}
|
||
if (/}(else|while)/) {
|
||
err("missing space after right brace");
|
||
}
|
||
if (/}\s\s+(else|while)/) {
|
||
err("extra space after right brace");
|
||
}
|
||
if (/^\s+#/) {
|
||
err("preprocessor statement not in column 1");
|
||
}
|
||
if (/^#\s/) {
|
||
err("blank after preprocessor #");
|
||
}
|
||
|
||
#
|
||
# We completely ignore, for purposes of indentation:
|
||
# * lines outside of functions
|
||
# * preprocessor lines
|
||
#
|
||
if ($check_continuation && $in_function && !$in_cpp) {
|
||
process_indent($_);
|
||
}
|
||
|
||
if (/^\s*else\W/) {
|
||
if (!$config{"uncuddled-else-ok"} && $prev =~ /^\s*}$/) {
|
||
err_prefix($prev,
|
||
"else and right brace should be on same line");
|
||
}
|
||
}
|
||
$prev = $line;
|
||
}
|
||
|
||
if ($prev eq "") {
|
||
err("last line in file is blank");
|
||
}
|
||
|
||
}
|
||
|
||
#
|
||
# Continuation-line checking
|
||
#
|
||
# The rest of this file contains the code for the continuation checking
|
||
# engine. It's a pretty simple state machine which tracks the expression
|
||
# depth (unmatched '('s and '['s).
|
||
#
|
||
# Keep in mind that the argument to process_indent() has already been heavily
|
||
# processed; all comments have been replaced by control-A, and the contents of
|
||
# strings and character constants have been elided.
|
||
#
|
||
|
||
my $cont_in; # currently inside of a continuation
|
||
my $cont_off; # skipping an initializer or definition
|
||
my $cont_noerr; # suppress cascading errors
|
||
my $cont_start; # the line being continued
|
||
my $cont_base; # the base indentation
|
||
my $cont_first; # this is the first line of a statement
|
||
my $cont_multiseg; # this continuation has multiple segments
|
||
|
||
my $cont_special; # this is a C statement (if, for, etc.)
|
||
my $cont_macro; # this is a macro
|
||
my $cont_case; # this is a multi-line case
|
||
|
||
my @cont_paren; # the stack of unmatched ( and [s we've seen
|
||
|
||
sub
|
||
reset_indent()
|
||
{
|
||
$cont_in = 0;
|
||
$cont_off = 0;
|
||
}
|
||
|
||
sub
|
||
delabel($)
|
||
{
|
||
#
|
||
# replace labels with tabs. Note that there may be multiple
|
||
# labels on a line.
|
||
#
|
||
local $_ = $_[0];
|
||
|
||
while (/^(\t*)( *(?:(?:\w+\s*)|(?:case\b[^:]*)): *)(.*)$/) {
|
||
my ($pre_tabs, $label, $rest) = ($1, $2, $3);
|
||
$_ = $pre_tabs;
|
||
while ($label =~ s/^([^\t]*)(\t+)//) {
|
||
$_ .= "\t" x (length($2) + length($1) / 8);
|
||
}
|
||
$_ .= ("\t" x (length($label) / 8)).$rest;
|
||
}
|
||
|
||
return ($_);
|
||
}
|
||
|
||
sub
|
||
process_indent($)
|
||
{
|
||
require strict;
|
||
local $_ = $_[0]; # preserve the global $_
|
||
|
||
s///g; # No comments
|
||
s/\s+$//; # Strip trailing whitespace
|
||
|
||
return if (/^$/); # skip empty lines
|
||
|
||
# regexps used below; keywords taking (), macros, and continued cases
|
||
my $special = '(?:(?:\}\s*)?else\s+)?(?:if|for|while|switch)\b';
|
||
my $macro = '[A-Z_][A-Z_0-9]*\(';
|
||
my $case = 'case\b[^:]*$';
|
||
|
||
# skip over enumerations, array definitions, initializers, etc.
|
||
if ($cont_off <= 0 && !/^\s*$special/ &&
|
||
(/(?:(?:\b(?:enum|struct|union)\s*[^\{]*)|(?:\s+=\s*)){/ ||
|
||
(/^\s*{/ && $prev =~ /=\s*(?:\/\*.*\*\/\s*)*$/))) {
|
||
$cont_in = 0;
|
||
$cont_off = tr/{/{/ - tr/}/}/;
|
||
return;
|
||
}
|
||
if ($cont_off) {
|
||
$cont_off += tr/{/{/ - tr/}/}/;
|
||
return;
|
||
}
|
||
|
||
if (!$cont_in) {
|
||
$cont_start = $line;
|
||
|
||
if (/^\t* /) {
|
||
err("non-continuation indented 4 spaces");
|
||
$cont_noerr = 1; # stop reporting
|
||
}
|
||
$_ = delabel($_); # replace labels with tabs
|
||
|
||
# check if the statement is complete
|
||
return if (/^\s*\}?$/);
|
||
return if (/^\s*\}?\s*else\s*\{?$/);
|
||
return if (/^\s*do\s*\{?$/);
|
||
return if (/{$/);
|
||
return if (/}[,;]?$/);
|
||
|
||
# Allow macros on their own lines
|
||
return if (/^\s*[A-Z_][A-Z_0-9]*$/);
|
||
|
||
# cases we don't deal with, generally non-kosher
|
||
if (/{/) {
|
||
err("stuff after {");
|
||
return;
|
||
}
|
||
|
||
# Get the base line, and set up the state machine
|
||
/^(\t*)/;
|
||
$cont_base = $1;
|
||
$cont_in = 1;
|
||
@cont_paren = ();
|
||
$cont_first = 1;
|
||
$cont_multiseg = 0;
|
||
|
||
# certain things need special processing
|
||
$cont_special = /^\s*$special/? 1 : 0;
|
||
$cont_macro = /^\s*$macro/? 1 : 0;
|
||
$cont_case = /^\s*$case/? 1 : 0;
|
||
} else {
|
||
$cont_first = 0;
|
||
|
||
# Strings may be pulled back to an earlier (half-)tabstop
|
||
unless ($cont_noerr || /^$cont_base / ||
|
||
(/^\t*(?: )?(?:gettext\()?\"/ && !/^$cont_base\t/)) {
|
||
err_prefix($cont_start,
|
||
"continuation should be indented 4 spaces");
|
||
}
|
||
}
|
||
|
||
my $rest = $_; # keeps the remainder of the line
|
||
|
||
#
|
||
# The split matches 0 characters, so that each 'special' character
|
||
# is processed separately. Parens and brackets are pushed and
|
||
# popped off the @cont_paren stack. For normal processing, we wait
|
||
# until a ; or { terminates the statement. "special" processing
|
||
# (if/for/while/switch) is allowed to stop when the stack empties,
|
||
# as is macro processing. Case statements are terminated with a :
|
||
# and an empty paren stack.
|
||
#
|
||
foreach $_ (split /[^\(\)\[\]\{\}\;\:]*/) {
|
||
next if (length($_) == 0);
|
||
|
||
# rest contains the remainder of the line
|
||
my $rxp = "[^\Q$_\E]*\Q$_\E";
|
||
$rest =~ s/^$rxp//;
|
||
|
||
if (/\(/ || /\[/) {
|
||
push @cont_paren, $_;
|
||
} elsif (/\)/ || /\]/) {
|
||
my $cur = $_;
|
||
tr/\)\]/\(\[/;
|
||
|
||
my $old = (pop @cont_paren);
|
||
if (!defined($old)) {
|
||
err("unexpected '$cur'");
|
||
$cont_in = 0;
|
||
last;
|
||
} elsif ($old ne $_) {
|
||
err("'$cur' mismatched with '$old'");
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
|
||
#
|
||
# If the stack is now empty, do special processing
|
||
# for if/for/while/switch and macro statements.
|
||
#
|
||
next if (@cont_paren != 0);
|
||
if ($cont_special) {
|
||
if ($rest =~ /^\s*{?$/) {
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
if ($rest =~ /^\s*;$/) {
|
||
err("empty if/for/while body ".
|
||
"not on its own line");
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
if (!$cont_first && $cont_multiseg == 1) {
|
||
err_prefix($cont_start,
|
||
"multiple statements continued ".
|
||
"over multiple lines");
|
||
$cont_multiseg = 2;
|
||
} elsif ($cont_multiseg == 0) {
|
||
$cont_multiseg = 1;
|
||
}
|
||
# We've finished this section, start
|
||
# processing the next.
|
||
goto section_ended;
|
||
}
|
||
if ($cont_macro) {
|
||
if ($rest =~ /^$/) {
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
}
|
||
} elsif (/\;/) {
|
||
if ($cont_case) {
|
||
err("unexpected ;");
|
||
} elsif (!$cont_special) {
|
||
err("unexpected ;") if (@cont_paren != 0);
|
||
if (!$cont_first && $cont_multiseg == 1) {
|
||
err_prefix($cont_start,
|
||
"multiple statements continued ".
|
||
"over multiple lines");
|
||
$cont_multiseg = 2;
|
||
} elsif ($cont_multiseg == 0) {
|
||
$cont_multiseg = 1;
|
||
}
|
||
if ($rest =~ /^$/) {
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
if ($rest =~ /^\s*special/) {
|
||
err("if/for/while/switch not started ".
|
||
"on its own line");
|
||
}
|
||
goto section_ended;
|
||
}
|
||
} elsif (/\{/) {
|
||
err("{ while in parens/brackets") if (@cont_paren != 0);
|
||
err("stuff after {") if ($rest =~ /[^\s}]/);
|
||
$cont_in = 0;
|
||
last;
|
||
} elsif (/\}/) {
|
||
err("} while in parens/brackets") if (@cont_paren != 0);
|
||
if (!$cont_special && $rest !~ /^\s*(while|else)\b/) {
|
||
if ($rest =~ /^$/) {
|
||
err("unexpected }");
|
||
} else {
|
||
err("stuff after }");
|
||
}
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
} elsif (/\:/ && $cont_case && @cont_paren == 0) {
|
||
err("stuff after multi-line case") if ($rest !~ /$^/);
|
||
$cont_in = 0;
|
||
last;
|
||
}
|
||
next;
|
||
section_ended:
|
||
# End of a statement or if/while/for loop. Reset
|
||
# cont_special and cont_macro based on the rest of the
|
||
# line.
|
||
$cont_special = ($rest =~ /^\s*$special/)? 1 : 0;
|
||
$cont_macro = ($rest =~ /^\s*$macro/)? 1 : 0;
|
||
$cont_case = 0;
|
||
next;
|
||
}
|
||
$cont_noerr = 0 if (!$cont_in);
|
||
}
|