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RecodeData.pm
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#! /bin/false # vim: set autoindent shiftwidth=4 tabstop=4: # Virtual base class for Locale::Recode converters. # Copyright (C) 2002-2016 Guido Flohr <guido.flohr@cantanea.com>, # all rights reserved. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. package Locale::RecodeData; use strict; sub new { my ($class, %args) = @_; bless { _from => $args{from}, _to => $args{to}, }, $class; } sub _getError { shift->{_error}; } 1; __END__ =head1 NAME Locale::RecodeData - Abstract Base Class for Charset Converters =head1 SYNOPSIS # For compatibility with Perl 5.005 and earlier, you must # *use* the module before inheriting from it! use qw (Locale::RecodeData); use base qw (Locale::RecodeData); =head1 DESCRIPTION The module B<Locale::RecodeData> serves as an abstract base class to all converters used by Locale::Recode(3). Adding new conversion modules is currently not straightforward, and you will have to edit the sources of some modules for that purpose. First, you have to add your new converter class to the list found in Locale::_Conversions(3), so that Locale::Recode(3) knows about its presence. If there are valid aliases for the codeset of your converter, you will also have to edit Locale::_Aliases(3). Finally, you have to implement the (protected) conversion routine _recode(). See below (L<"INTERFACE")> for details. =head1 CONSTRUCTOR =over 4 =item B<new (from =E<gt> FROM_CODESET, to =E<gt> TO_CODESET)> The constructor takes two (named) arguments: =over 8 =item B<from> The canonical name of the source codeset. Aliases have already been resolved and the name is converted to uppercase. =item B<to> The canonical name of the destination codeset. Aliases have already been resolved and the name is converted to uppercase. =back You normally don't have to implement the constructor. The default constructor implemented here will store the source and destination codesets in the protected members C<_from> and C<_to>. =back =head1 METHODS The class implements one method: =over 4 =item B<_getError> Returns the (protected) member C<_error>. =back =head1 INTERFACE New conversion classes must provide the following interface: =over 4 =item B<new (from =E<gt> FROM_CODESET, to =E<gt> TO_CODESET)> The constructor takes two (named) arguments: =over 8 =item B<from> The canonical name of the source codeset. Aliases have already been resolved and the name is converted to uppercase. =item B<to> The canonical name of the destination codeset. Aliases have already been resolved and the name is converted to uppercase. =back =item B<_getError> Should return the last error (as a string) or false if there was no error. This method is implemented in the base class already. =item B<_recode STRINGREF> Should convert the argument C<STRINGREF> in-place. In case of failure, return false, and make provisions that the method C<_getError()> returns an informative error message. =back =head1 AUTHOR Copyright (C) 2002-2016 L<Guido Flohr|http://www.guido-flohr.net/> (L<mailto:guido.flohr@cantanea.com>), all rights reserved. See the source code for details!code for details! =head1 SEE ALSO Locale::Recode::_Aliases(3pm), Locale::Recode::_Conversions(3pm), Locale::Recode(3pm), perl(1) =cut Local Variables: mode: perl perl-indent-level: 4 perl-continued-statement-offset: 4 perl-continued-brace-offset: 0 perl-brace-offset: -4 perl-brace-imaginary-offset: 0 perl-label-offset: -4 cperl-indent-level: 4 cperl-continued-statement-offset: 2 tab-width: 4 End: