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#!/usr/bin/perl
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; # ^ Run only under a shell
#!./perl
use 5.008001;
BEGIN { pop @INC if $INC[-1] eq '.' }
use strict;
use warnings;
use Encode;
use Getopt::Std;
use Carp;
use Encode::Guess;
$Getopt::Std::STANDARD_HELP_VERSION = 1;
my %opt;
getopts( "huSs:", \%opt );
my @suspect_list;
list_valid_suspects() and exit if $opt{S};
@suspect_list = split /:,/, $opt{s} if $opt{s};
HELP_MESSAGE() if $opt{h};
HELP_MESSAGE() unless @ARGV;
do_guess($_) for @ARGV;
sub read_file {
my $filename = shift;
local $/;
open my $fh, '<:raw', $filename or croak "$filename:$!";
my $content = <$fh>;
close $fh;
return $content;
}
sub do_guess {
my $filename = shift;
my $data = read_file($filename);
my $enc = guess_encoding( $data, @suspect_list );
if ( !ref($enc) && $opt{u} ) {
return 1;
}
print "$filename\t";
if ( ref($enc) ) {
print $enc->mime_name();
}
else {
print "unknown";
}
print "\n";
return 1;
}
sub list_valid_suspects {
print join( "\n", Encode->encodings(":all") );
print "\n";
return 1;
}
sub HELP_MESSAGE {
exec 'pod2usage', $0 or die "pod2usage: $!"
}
__END__
=head1 NAME
encguess - guess character encodings of files
=head1 VERSION
$Id: encguess,v 0.3 2020/12/02 01:28:17 dankogai Exp $
=head1 SYNOPSIS
encguess [switches] filename...
=head2 SWITCHES
=over 2
=item -h
show this message and exit.
=item -s
specify a list of "suspect encoding types" to test,
separated by either C<:> or C<,>
=item -S
output a list of all acceptable encoding types that can be used with
the -s param
=item -u
suppress display of unidentified types
=back
=head2 EXAMPLES:
=over 2
=item *
Guess encoding of a file named C<test.txt>, using only the default
suspect types.
encguess test.txt
=item *
Guess the encoding type of a file named C<test.txt>, using the suspect
types C<euc-jp,shiftjis,7bit-jis>.
encguess -s euc-jp,shiftjis,7bit-jis test.txt
encguess -s euc-jp:shiftjis:7bit-jis test.txt
=item *
Guess the encoding type of several files, do not display results for
unidentified files.
encguess -us euc-jp,shiftjis,7bit-jis test*.txt
=back
=head1 DESCRIPTION
The encoding identification is done by checking one encoding type at a
time until all but the right type are eliminated. The set of encoding
types to try is defined by the -s parameter and defaults to ascii,
utf8 and UTF-16/32 with BOM. This can be overridden by passing one or
more encoding types via the -s parameter. If you need to pass in
multiple suspect encoding types, use a quoted string with the a space
separating each value.
=head1 SEE ALSO
L<Encode::Guess>, L<Encode::Detect>
=head1 LICENSE AND COPYRIGHT
Copyright 2015 Michael LaGrasta and Dan Kogai.
This program is free software; you can redistribute it and/or modify it
under the terms of the the Artistic License (2.0). You may obtain a
copy of the full license at:
L<http://www.perlfoundation.org/artistic_license_2_0>
=cut