xref: /openbsd/gnu/usr.bin/perl/Porting/checkansi.pl (revision d89ec533) 
1#!/usr/bin/perl -w
2use strict;
3use warnings;
4use 5.010;
5use File::Find;
6use IO::File;
7use Getopt::Long;
8use Pod::Usage;
9
10my %limits = (
11  c90 => {
12           'logical-source-line-length' => 509,
13         },
14  c99 => {
15           'logical-source-line-length' => 4095,
16         },
17);
18
19my %opt = (
20  std => 'c99',
21);
22
23GetOptions(\%opt, qw( logical-source-line-length=i std=s ))
24  && @ARGV && exists $limits{$opt{std}}
25    or pod2usage(2);
26
27for my $k (keys %{$limits{$opt{std}}}) {
28  $opt{$k} //= $limits{$opt{std}}{$k};
29}
30
31{
32  my $num = 1;
33
34  sub report
35  {
36    my $msg = shift;
37    my $info = join '', @_;
38
39    if ($info) {
40      $info =~ s/\R+$//;
41      $info =~ s/^/   #|\t/mg;
42      $info = "\n$info\n\n";
43    }
44
45    warn sprintf "[%d] %s(%d): %s\n%s",
46         $num++, $File::Find::name, $., $msg, $info;
47  }
48}
49
50find(sub {
51  /\.([ch]|xs)$/ or return;
52
53  my $fh = IO::File->new($_, 'r') or die "$_: $!\n";
54  my $ll = '';
55
56  while (defined(my $line = <$fh>)) {
57    report("trailing whitespace after backslash", $line)
58        if $line =~ /\\[[:blank:]]+$/;
59
60    $ll .= $line;
61
62    unless ($ll =~ /\\$/) {
63      if (length $ll > $opt{'logical-source-line-length'}) {
64        report(sprintf("logical source line too long (%d > %d)",
65                       length $ll, $opt{'logical-source-line-length'}), $ll);
66      }
67      $ll = '';
68    }
69  }
70}, @ARGV);
71
72__END__
73
74=head1 NAME
75
76checkansi.pl - Check source code for ANSI-C violations
77
78=head1 SYNOPSIS
79
80checkansi.pl [B<--std>=c90|c99]
81[B<--logical-source-line-length>=I<num>]
82<path> ...
83
84=head1 DESCRIPTION
85
86B<checkansi.pl> searches
87
88=head1 OPTIONS
89
90=over 4
91
92=item B<--std>=c90|c99
93
94Choose the ANSI/ISO standard against which shall be checked.
95Defaults to C<c99>.
96
97=item B<--logical-source-line-length>=I<number>
98
99Maximum length of a logical source line. Overrides the default
100given by the chosen standard.
101
102=back
103
104=head1 COPYRIGHT
105
106Copyright 2007 by Marcus Holland-Moritz <mhx@cpan.org>.
107
108This program is free software; you may redistribute it
109and/or modify it under the same terms as Perl itself.
110
111=cut
112