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Edit File: piconv
#!/usr/bin/perl eval 'exec /usr/bin/perl -S $0 ${1+"$@"}' if 0; # ^ Run only under a shell #!./perl # $Id: piconv,v 2.8 2016/08/04 03:15:58 dankogai Exp $ # BEGIN { pop @INC if $INC[-1] eq '.' } use 5.8.0; use strict; use Encode ; use Encode::Alias; my %Scheme = map {$_ => 1} qw(from_to decode_encode perlio); use File::Basename; my $name = basename($0); use Getopt::Long qw(:config no_ignore_case); my %Opt; help() unless GetOptions(\%Opt, 'from|f=s', 'to|t=s', 'list|l', 'string|s=s', 'check|C=i', 'c', 'perlqq|p', 'htmlcref', 'xmlcref', 'debug|D', 'scheme|S=s', 'resolve|r=s', 'help', ); $Opt{help} and help(); $Opt{list} and list_encodings(); my $locale = $ENV{LC_CTYPE} || $ENV{LC_ALL} || $ENV{LANG}; defined $Opt{resolve} and resolve_encoding($Opt{resolve}); $Opt{from} || $Opt{to} || help(); my $from = $Opt{from} || $locale or help("from_encoding unspecified"); my $to = $Opt{to} || $locale or help("to_encoding unspecified"); $Opt{string} and Encode::from_to($Opt{string}, $from, $to) and print $Opt{string} and exit; my $scheme = do { if (defined $Opt{scheme}) { if (!exists $Scheme{$Opt{scheme}}) { warn "Unknown scheme '$Opt{scheme}', fallback to 'from_to'.\n"; 'from_to'; } else { $Opt{scheme}; } } else { 'from_to'; } }; $Opt{check} ||= $Opt{c}; $Opt{perlqq} and $Opt{check} = Encode::PERLQQ; $Opt{htmlcref} and $Opt{check} = Encode::HTMLCREF; $Opt{xmlcref} and $Opt{check} = Encode::XMLCREF; my $efrom = Encode->getEncoding($from) || die "Unknown encoding '$from'"; my $eto = Encode->getEncoding($to) || die "Unknown encoding '$to'"; my $cfrom = $efrom->name; my $cto = $eto->name; if ($Opt{debug}){ print <<"EOT"; Scheme: $scheme From: $from => $cfrom To: $to => $cto EOT } my %use_bom = map { $_ => 1 } qw/UTF-16 UTF-16BE UTF-16LE UTF-32 UTF-32BE UTF-32LE/; # we do not use <> (or ARGV) for the sake of binmode() @ARGV or push @ARGV, \*STDIN; unless ( $scheme eq 'perlio' ) { binmode STDOUT; my $need2slurp = $use_bom{ $eto } || $use_bom{ $efrom }; for my $argv (@ARGV) { my $ifh = ref $argv ? $argv : undef; $ifh or open $ifh, "<", $argv or warn "Can't open $argv: $!" and next; $ifh or open $ifh, "<", $argv or next; binmode $ifh; if ( $scheme eq 'from_to' ) { # default if ($need2slurp){ local $/; $_ = <$ifh>; Encode::from_to( $_, $from, $to, $Opt{check} ); print; }else{ while (<$ifh>) { Encode::from_to( $_, $from, $to, $Opt{check} ); print; } } } elsif ( $scheme eq 'decode_encode' ) { # step-by-step if ($need2slurp){ local $/; $_ = <$ifh>; my $decoded = decode( $from, $_, $Opt{check} ); my $encoded = encode( $to, $decoded ); print $encoded; }else{ while (<$ifh>) { my $decoded = decode( $from, $_, $Opt{check} ); my $encoded = encode( $to, $decoded ); print $encoded; } } } else { # won't reach die "$name: unknown scheme: $scheme"; } } } else { # NI-S favorite binmode STDOUT => "raw:encoding($to)"; for my $argv (@ARGV) { my $ifh = ref $argv ? $argv : undef; $ifh or open $ifh, "<", $argv or warn "Can't open $argv: $!" and next; $ifh or open $ifh, "<", $argv or next; binmode $ifh => "raw:encoding($from)"; print while (<$ifh>); } } sub list_encodings { print join( "\n", Encode->encodings(":all") ), "\n"; exit 0; } sub resolve_encoding { if ( my $alias = Encode::resolve_alias( $_[0] ) ) { print $alias, "\n"; exit 0; } else { warn "$name: $_[0] is not known to Encode\n"; exit 1; } } sub help { my $message = shift; $message and print STDERR "$name error: $message\n"; print STDERR <<"EOT"; $name [-f from_encoding] [-t to_encoding] [-p|--perlqq|--htmlcref|--xmlcref] [-C N|-c] [-D] [-S scheme] [-s string|file...] $name -l $name -r encoding_alias $name -h Common options: -l,--list lists all available encodings -r,--resolve encoding_alias resolve encoding to its (Encode) canonical name -f,--from from_encoding when omitted, the current locale will be used -t,--to to_encoding when omitted, the current locale will be used -s,--string string "string" will be the input instead of STDIN or files The following are mainly of interest to Encode hackers: -C N | -c check the validity of the input -D,--debug show debug information -S,--scheme scheme use the scheme for conversion Those are handy when you can only see ASCII characters: -p,--perlqq transliterate characters missing in encoding to \\x{HHHH} where HHHH is the hexadecimal Unicode code point --htmlcref transliterate characters missing in encoding to &#NNN; where NNN is the decimal Unicode code point --xmlcref transliterate characters missing in encoding to &#xHHHH; where HHHH is the hexadecimal Unicode code point EOT exit; } __END__ =head1 NAME piconv -- iconv(1), reinvented in perl =head1 SYNOPSIS piconv [-f from_encoding] [-t to_encoding] [-p|--perlqq|--htmlcref|--xmlcref] [-C N|-c] [-D] [-S scheme] [-s string|file...] piconv -l piconv -r encoding_alias piconv -h =head1 DESCRIPTION B<piconv> is perl version of B<iconv>, a character encoding converter widely available for various Unixen today. This script was primarily a technology demonstrator for Perl 5.8.0, but you can use piconv in the place of iconv for virtually any case. piconv converts the character encoding of either STDIN or files specified in the argument and prints out to STDOUT. Here is the list of options. Some options can be in short format (-f) or long (--from) one. =over 4 =item -f,--from I<from_encoding> Specifies the encoding you are converting from. Unlike B<iconv>, this option can be omitted. In such cases, the current locale is used. =item -t,--to I<to_encoding> Specifies the encoding you are converting to. Unlike B<iconv>, this option can be omitted. In such cases, the current locale is used. Therefore, when both -f and -t are omitted, B<piconv> just acts like B<cat>. =item -s,--string I<string> uses I<string> instead of file for the source of text. =item -l,--list Lists all available encodings, one per line, in case-insensitive order. Note that only the canonical names are listed; many aliases exist. For example, the names are case-insensitive, and many standard and common aliases work, such as "latin1" for "ISO-8859-1", or "ibm850" instead of "cp850", or "winlatin1" for "cp1252". See L<Encode::Supported> for a full discussion. =item -r,--resolve I<encoding_alias> Resolve I<encoding_alias> to Encode canonical encoding name. =item -C,--check I<N> Check the validity of the stream if I<N> = 1. When I<N> = -1, something interesting happens when it encounters an invalid character. =item -c Same as C<-C 1>. =item -p,--perlqq Transliterate characters missing in encoding to \x{HHHH} where HHHH is the hexadecimal Unicode code point. =item --htmlcref Transliterate characters missing in encoding to &#NNN; where NNN is the decimal Unicode code point. =item --xmlcref Transliterate characters missing in encoding to &#xHHHH; where HHHH is the hexadecimal Unicode code point. =item -h,--help Show usage. =item -D,--debug Invokes debugging mode. Primarily for Encode hackers. =item -S,--scheme I<scheme> Selects which scheme is to be used for conversion. Available schemes are as follows: =over 4 =item from_to Uses Encode::from_to for conversion. This is the default. =item decode_encode Input strings are decode()d then encode()d. A straight two-step implementation. =item perlio The new perlIO layer is used. NI-S' favorite. You should use this option if you are using UTF-16 and others which linefeed is not $/. =back Like the I<-D> option, this is also for Encode hackers. =back =head1 SEE ALSO L<iconv(1)> L<locale(3)> L<Encode> L<Encode::Supported> L<Encode::Alias> L<PerlIO> =cut