Unicode::MapUTF8(3) User Contributed Perl Documentation Unicode::MapUTF8(3)NAMEUnicode::MapUTF8 - Conversions to and from arbitrary character sets and
UTF8
SYNOPSIS
use Unicode::MapUTF8 qw(to_utf8 from_utf8 utf8_supported_charset);
# Convert a string in 'ISO-8859-1' to 'UTF8'
my $output = to_utf8({ -string => 'An example', -charset => 'ISO-8859-1' });
# Convert a string in 'UTF8' encoding to encoding 'ISO-8859-1'
my $other = from_utf8({ -string => 'Other text', -charset => 'ISO-8859-1' });
# List available character set encodings
my @character_sets = utf8_supported_charset;
# Add a character set alias
utf8_charset_alias({ 'ms-japanese' => 'sjis' });
# Convert between two arbitrary (but largely compatible) charset encodings
# (SJIS to EUC-JP)
my $utf8_string = to_utf8({ -string =>$sjis_string, -charset => 'sjis'});
my $euc_jp_string = from_utf8({ -string => $utf8_string, -charset => 'euc-jp' })
# Verify that a specific character set is supported
if (utf8_supported_charset('ISO-8859-1') {
# Yes
}
DESCRIPTION
Provides an adapter layer between core routines for converting to and
from UTF8 and other encodings. In essence, a way to give multiple
existing Unicode modules a single common interface so you don't have to
know the underlaying implementations to do simple UTF8 to-from other
character set encoding conversions. As such, it wraps the Uni‐
code::String, Unicode::Map8, Unicode::Map and Jcode modules in a stan‐
dardized and simple API.
This also provides general character set conversion operation based on
UTF8 - it is possible to convert between any two compatible and sup‐
ported character sets via a simple two step chaining of conversions.
As with most things Perlish - if you give it a few big chunks of text
to chew on instead of lots of small ones it will handle many more char‐
acters per second.
By design, it can be easily extended to encompass any new charset
encoding conversion modules that arrive on the scene.
This module is intended to provide good Unicode support to versions of
Perl prior to 5.8. If you are using Perl 5.8.0 or later, you probably
want to be using the Encode module instead. This module does work with
Perl 5.8, but Encode is the preferred method in that environment.
CHANGES
1.11 2005.10.10 Documentation changes. Addition of Build.PL support.
Added various build tests, LICENSE, Artistic_License.txt,
GPL_License.txt. Split documentation into seperate
.pod file. Added Japanese translation of POD.
1.10 2005.05.22 - Fixed bug in conversion of ISO-2022-JP to UTF-8.
Problem and fix found by Masahiro HONMA
<masahiro.honma@tsutaya.co.jp>.
Similar bugs in conversions of shift_jis and euc-jp
to UTF-8 fixed as well.
1.09 2001.08.22 - Fixed multiple typo occurances of 'uft'
where 'utf' was meant in code. Problem affected
utf16 and utf7 encodings. Problem found
by devon smith <devon@taller.PSCL.cwru.edu>
1.08 2000.11.06 - Added 'utf8_charset_alias' function to
allow for runtime setting of character
set aliases. Added several alternate
names for 'sjis' (shiftjis, shift-jis,
shift_jis, s-jis, and s_jis).
Corrected 'croak' messages for
'from_utf8' functions to appropriate
function name.
Tightened up initialization encapsulation
Corrected fatal problem in jcode from
unicode internals. Problem and fix
found by Brian Wisti <wbrian2@uswest.net>.
1.07 2000.11.01 - Added 'croak' to use Carp declaration to
fix error messages. Problem and fix
found by Brian Wisti
<wbrian2@uswest.net>.
1.06 2000.10.30 - Fix to handle change in stringification
of overloaded objects between Perl 5.005
and 5.6. Problem noticed by Brian Wisti
<wbrian2@uswest.net>.
1.05 2000.10.23 - Error in conversions from UTF8 to
multibyte encodings corrected
1.04 2000.10.23 - Additional diagnostic messages added
for internal error conditions
1.03 2000.10.22 - Bug fix for load time autodetction of
Unicode::Map8 encodings
1.02 2000.10.22 - Added load time autodetection of
Unicode::Map8 supported character set
encodings.
Fixed internal calling error for some
character sets with 'from_utf8'. Thanks
goes to Ilia Lobsanov
<ilia@lobsanov.com> for reporting this
problem.
1.01 2000.10.02 - Fixed handling of empty strings and
added more identification for error
messages.
1.00 2000.09.29 - Pre-release version
FUNCTIONS
utf8_charset_alias({ $alias => $charset });
Used for runtime assignment of character set aliases.
Called with no parameters, returns a hash of defined aliases and
the character sets they map to.
Example:
my $aliases = utf8_charset_alias;
my @alias_names = keys %$aliases;
If called with ONE parameter, returns the name of the 'real'
charset if the alias is defined. Returns undef if it is not found
in the aliases.
Example:
if (! utf8_charset_alias('VISCII')) {
# No alias for this
}
If called with a list of 'alias' => 'charset' pairs, defines those
aliases for use.
Example:
utf8_charset_alias({ 'japanese' => 'sjis', 'japan' => 'sjis' });
Note: It will croak if a passed pair does not map to a character
set defined in the predefined set of character encoding. It is NOT
allowed to alias something to another alias.
Multiple character set aliases can be set with a single call.
To clear an alias, pass a character set mapping of undef.
Example:
utf8_charset_alias({ 'japanese' => undef });
While an alias is set, the 'utf8_supported_charset' function will
return the alias as if it were a predefined charset.
Overriding a base defined character encoding with an alias will
generate a warning message to STDERR.
utf8_supported_charset($charset_name);
Returns true if the named charset is supported (including user
defined aliases).
Returns false if it is not.
Example:
if (! utf8_supported_charset('VISCII')) {
# No support yet
}
If called in a list context with no parameters, it will return a
list of all supported character set names (including user defined
aliases).
Example:
my @charsets = utf8_supported_charset;
to_utf8({ -string => $string, -charset => $source_charset });
Returns the string converted to UTF8 from the specified source
charset.
from_utf8({ -string => $string, -charset => $target_charset});
Returns the string converted from UTF8 to the specified target
charset.
VERSION
1.11 2005.10.10
TODO
Regression tests for Jcode, 2-byte encodings and encoding aliases
SEE ALSO
Unicode::String Unicode::Map8 Unicode::Map Jcode Encode
COPYRIGHT
Copyright 2000-2005, Benjamin Franz. All rights reserved.
AUTHOR
Benjamin Franz <snowhare@nihongo.org>
LICENSE
This program is free software; you can redistribute it and/or modify it
under the same terms and conditions as Perl itself.
This means that you can, at your option, redistribute it and/or modify
it under either the terms the GNU Public License (GPL) version 1 or
later, or under the Perl Artistic License.
See http://dev.perl.org/licenses/
DISCLAIMER
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Use of this software in any way or in any form, source or binary, is
not allowed in any country which prohibits disclaimers of any implied
warranties of merchantability or fitness for a particular purpose or
any disclaimers of a similar nature.
IN NO EVENT SHALL I BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPE‐
CIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
THIS SOFTWARE AND ITS DOCUMENTATION (INCLUDING, BUT NOT LIMITED TO,
LOST PROFITS) EVEN IF I HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE
perl v5.8.8 2008-05-13 Unicode::MapUTF8(3)
