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require 5.7.3;
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package Encode::Unicode::UTF1;
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use strict;
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use vars qw($VERSION);
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$VERSION=do{my @r=(q$Revision: 1.4 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
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use base qw(Encode::Encoding);
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__PACKAGE__->Define (qw/ISO-10646-UTF-1 utf-1 utf1 csISO10646UTF1 iso-ir-178/);
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sub encode ($$;$) {
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my ($obj, $str, $chk) = @_;
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my @str = split //, $str;
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$str = '';
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for (@str) {
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$str .= join '', map {chr} _ucs4toutf1 (ord $_);
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}
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$_[1] = '' if $chk;
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return $str;
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}
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sub decode ($$;$) {
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my ($obj, $str, $chk) = @_;
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$str =~ s{([\xA0-\xF5].|[\xF6-\xFB]..|[\xFC-\xFF]....)}{
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chr (_utf1toucs4 (unpack 'C*', $1))
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}gex;
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$_[1] = '' if $chk;
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return $str;
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}
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sub _ucs4toutf1 ($) {
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my $U = shift;
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return ($U) if $U <= 0x9F;
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return (0xA0, $U) if $U <= 0xFF;
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return (int (0xA1 + ( $U - 0x100 ) / 0xBE),
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T( ( $U - 0x100 ) % 0xBE)) if $U <= 0x4015;
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return (int (0xF6 + ( $U - 0x4016 ) / ( 0xBE**2 )),
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T( ( $U - 0x4016 ) / 0xBE % 0xBE),
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T( ( $U - 0x4016 ) % 0xBE )) if $U <= 0x38E2D;
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return (int (0xFC + ( $U - 0x38E2E ) / ( 0xBE**4 )),
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T( ( $U - 0x38E2E ) / ( 0xBE**3 ) % 0xBE),
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T( ( $U - 0x38E2E ) / ( 0xBE**2 ) % 0xBE),
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T( ( $U - 0x38E2E ) / 0xBE % 0xBE),
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T( ( $U - 0x38E2E ) % 0xBE ));
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}
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sub _utf1toucs4 (@) {
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my ($x, $y, $z, $v, $w) = @_;
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return $x if @_ == 1 && $x <= 0x9F;
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return $y if $x == 0xA0;
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return ($x - 0xA1) * 0xBE + U($y) + 0x100
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if 0xA1 <= $x && $x <= 0xF5;
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return ($x - 0xF6) * ( 0xBE**2 ) + U($y) * 0xBE + U($z) + 0x4016
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if 0xF6 <= $x && $x <= 0xFB;
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return ($x - 0xFC) * ( 0xBE**4 ) + U($y) * ( 0xBE**3 )
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+ U($z) * ( 0xBE**2 ) + U($v) * 0xBE
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+ U($w) + 0x38E2E;
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}
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sub T ($) {
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my $z = int (shift);
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return $z + 0x21 if $z <= 0x5D;
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return $z + 0x42 if $z <= 0xBD;
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return $z - 0xBE if $z <= 0xDE;
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return $z - 0x60;
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}
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sub U ($) {
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my $z = shift;
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return $z + 0xBE if $z <= 0x20;
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return $z - 0x21 if $z <= 0x7E;
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return $z + 0x60 if $z <= 0x9F;
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return $z - 0x42;
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}
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1;
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__END__
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=head1 NAME
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Encode::Unicode::UTF1 --- Encode/decode of UTF-1
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=head1 EXAMPLE
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use Encode;
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my $s = "some string in utf-8 (to be converted to utf-\x{4E00})";
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print encode ('utf-1', $s);
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my $b = "\xE0\xC2\xE0\xC4\xE0\xC6\xE0\xC8\xE0\xCA";
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print decode ('utf-1', $b);
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=head1 LICENSE
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Copyright 2002 Wakaba E<lt>w@suika.fam.cxE<gt>.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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=cut
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# $Date: 2002/09/20 14:01:45 $
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### UTF1.pm ends here
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