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- package Text::Iconv;
- # @(#) $Id: Iconv.pm,v 1.10 2007/10/17 14:14:22 mxp Exp $
- # Copyright (c) 2007 Michael Piotrowski
-
- use strict;
- use vars qw($VERSION @ISA @EXPORT @EXPORT_OK);
-
- require Exporter;
- require DynaLoader;
- require AutoLoader;
-
- @ISA = qw(Exporter AutoLoader DynaLoader);
- # Items to export into callers namespace by default. Note: do not export
- # names by default without a very good reason. Use EXPORT_OK instead.
- # Do not simply export all your public functions/methods/constants.
- @EXPORT_OK = qw(
- convert
- );
- $VERSION = '1.7';
-
- bootstrap Text::Iconv $VERSION;
-
- # Preloaded methods go here.
-
- # Autoload methods go after =cut, and are processed by the autosplit program.
-
- 1;
- __END__
- # Below is the documentation for the module.
-
- =head1 NAME
-
- Text::Iconv - Perl interface to iconv() codeset conversion function
-
- =head1 SYNOPSIS
-
- use Text::Iconv;
- $converter = Text::Iconv->new("fromcode", "tocode");
- $converted = $converter->convert("Text to convert");
-
- =head1 DESCRIPTION
-
- The B<Text::Iconv> module provides a Perl interface to the iconv()
- function as defined by the Single UNIX Specification.
-
- The convert() method converts the encoding of characters in the input
- string from the I<fromcode> codeset to the I<tocode> codeset, and
- returns the result.
-
- Settings of I<fromcode> and I<tocode> and their permitted combinations
- are implementation-dependent. Valid values are specified in the
- system documentation; the iconv(1) utility should also provide a B<-l>
- option that lists all supported codesets.
-
- =head2 Utility methods
-
- B<Text::Iconv> objects also provide the following methods:
-
- retval() returns the return value of the underlying iconv() function
- for the last conversion; according to the Single UNIX Specification,
- this value indicates "the number of non-identical conversions
- performed." Note, however, that iconv implementations vary widely in
- the interpretation of this specification.
-
- This method can be called after calling convert(), e.g.:
-
- $result = $converter->convert("lorem ipsum dolor sit amet");
- $retval = $converter->retval;
-
- When called before the first call to convert(), or if an error occured
- during the conversion, retval() returns B<undef>.
-
- get_attr(): This method is only available with GNU libiconv, otherwise
- it throws an exception. The get_attr() method allows you to query
- various attributes which influence the behavior of convert(). The
- currently supported attributes are I<trivialp>, I<transliterate>, and
- I<discard_ilseq>, e.g.:
-
- $state = $converter->get_attr("transliterate");
-
- See iconvctl(3) for details. To ensure portability to other iconv
- implementations you should first check for the availability of this
- method using B<eval {}>, e.g.:
-
- eval { $conv->get_attr("trivialp") };
- if ($@)
- {
- # get_attr() is not available
- }
- else
- {
- # get_attr() is available
- }
-
- This method should be considered experimental.
-
- set_attr(): This method is only available with GNU libiconv, otherwise
- it throws an exception. The set_attr() method allows you to set
- various attributes which influence the behavior of convert(). The
- currently supported attributes are I<transliterate> and
- I<discard_ilseq>, e.g.:
-
- $state = $converter->set_attr("transliterate");
-
- See iconvctl(3) for details. To ensure portability to other iconv
- implementations you should first check for the availability of this
- method using B<eval {}>, cf. the description of set_attr() above.
-
- This method should be considered experimental.
-
- =head1 ERRORS
-
- If the conversion can't be initialized an exception is raised (using
- croak()).
-
- =head2 Handling of conversion errors
-
- I<Text::Iconv> provides a class attribute B<raise_error> and a
- corresponding class method for setting and getting its value. The
- handling of errors during conversion depends on the setting of this
- attribute. If B<raise_error> is set to a true value, an exception is
- raised; otherwise, the convert() method only returns B<undef>. By
- default B<raise_error> is false. Example usage:
-
- Text::Iconv->raise_error(1); # Conversion errors raise exceptions
- Text::Iconv->raise_error(0); # Conversion errors return undef
- $a = Text::Iconv->raise_error(); # Get current setting
-
- =head2 Per-object handling of conversion errors
-
- As an experimental feature, I<Text::Iconv> also provides an instance
- attribute B<raise_error> and a corresponding method for setting and
- getting its value. If B<raise_error> is B<undef>, the class-wide
- settings apply. If B<raise_error> is 1 or 0 (true or false), the
- object settings override the class-wide settings.
-
- Consult L<iconv(3)> for details on errors that might occur.
-
- =head2 Conversion of B<undef>
-
- Converting B<undef>, e.g.,
-
- $converted = $converter->convert(undef);
-
- always returns B<undef>. This is not considered an error.
-
- =head1 NOTES
-
- The supported codesets, their names, the supported conversions, and
- the quality of the conversions are all system-dependent.
-
- =head1 AUTHOR
-
- Michael Piotrowski <mxp@dynalabs.de>
-
- =head1 SEE ALSO
-
- iconv(1), iconv(3)
-
- =cut
-