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NAME
Unicode::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
Unicode::String, Unicode::Map8, Unicode::Map and Jcode modules in a
standardized and simple API.
This also provides general character set conversion operation based on
UTF8 - it is possible to convert between any two compatible and
supported 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
characters 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
1.14 2020.09.27 Fixing POD breakage in EUC-JP version of POD
1.13 2020.09.27 Fixing MANIFEST.SKIP error
1.12 2020.09.27 Build tool updates. Maintainer updates. POD error fixes.
Relicensed under MIT license.
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 AT tsutaya.jp>.
Similar bugs in conversions of shift_jis and euc-jp
to UTF-8 corrected 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 AT taller.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.
Corrected fatal problem in jcode-unicode internals. Problem
and fix found by Brian Wisti <wbrian2 AT uswest.net>.
1.07 2000.11.01 Added 'croak' to use Carp declaration to fix error
messages. Problem and fix found by <wbrian2 AT 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 AT uswest.net>.
1.05 2000.10.23 Error in conversions from UTF8 to multibyte encodings
corrected
1.04 2000.10.23 Additional diagnostic error messages added for internal
errors
1.03 2000.10.22 Bug fix for load time Unicode::Map encoding detection
1.02 2000.10.22 Bug fix to 'from_utf8' method and load time detection of
Unicode::Map8 supported character set encodings
1.01 2000.10.02 Initial public release
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
1.14 2020.09.27
TODO
Regression tests for Jcode, 2-byte encodings and encoding aliases
SEE ALSO
Unicode::String Unicode::Map8 Unicode::Map Jcode Encode
COPYRIGHT
Copyright 2000-2020, Jerilyn Franz. All rights reserved.
AUTHOR
Jerilyn Franz <cpan AT jerilyn.info>
LICENSE
MIT License
Copyright (c) 2020 Jerilyn Franz
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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