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_Conversions.pm
#! /bin/false # vim: set autoindent shiftwidth=4 tabstop=4: # List of internally known conversions. # Copyright (C) 2002-2017 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::Recode::_Conversions; use strict; use integer; use vars qw ($conversions $optional_conversions); # These are the canonical names of the encodings always available. $conversions = { 'ASMO_449' => 'ASMO_449', 'ATARI-ST-EURO' => 'ATARI_ST_EURO', 'ATARI-ST' => 'ATARI_ST', 'CP10007' => 'CP10007', 'CSN_369103' => 'CSN_369103', 'CWI' => 'CWI', 'DEC-MCS' => 'DEC_MCS', 'EBCDIC-AT-DE-A' => 'EBCDIC_AT_DE_A', 'EBCDIC-AT-DE' => 'EBCDIC_AT_DE', 'EBCDIC-CA-FR' => 'EBCDIC_CA_FR', 'EBCDIC-DK-NO-A' => 'EBCDIC_DK_NO_A', 'EBCDIC-DK-NO' => 'EBCDIC_DK_NO', 'EBCDIC-ES-A' => 'EBCDIC_ES_A', 'EBCDIC-ES-S' => 'EBCDIC_ES_S', 'EBCDIC-ES' => 'EBCDIC_ES', 'EBCDIC-FI-SE-A' => 'EBCDIC_FI_SE_A', 'EBCDIC-FI-SE' => 'EBCDIC_FI_SE', 'EBCDIC-FR' => 'EBCDIC_FR', 'EBCDIC-IS-FRISS' => 'EBCDIC_IS_FRISS', 'EBCDIC-IT' => 'EBCDIC_IT', 'EBCDIC-PT' => 'EBCDIC_PT', 'EBCDIC-UK' => 'EBCDIC_UK', 'EBCDIC-US' => 'EBCDIC_US', 'ECMA-CYRILLIC' => 'ECMA_CYRILLIC', 'GEORGIAN-ACADEMY' => 'GEORGIAN_ACADEMY', 'GEORGIAN-PS' => 'GEORGIAN_PS', 'GOST_19768-74' => 'GOST_19768_74', 'GREEK-CCITT' => 'GREEK_CCITT', 'GREEK7-OLD' => 'GREEK7_OLD', 'GREEK7' => 'GREEK7', 'HP-ROMAN8' => 'HP_ROMAN8', 'IBM037' => 'IBM037', 'IBM038' => 'IBM038', 'IBM1004' => 'IBM1004', 'IBM1026' => 'IBM1026', 'IBM1047' => 'IBM1047', 'IBM256' => 'IBM256', 'IBM273' => 'IBM273', 'IBM274' => 'IBM274', 'IBM275' => 'IBM275', 'IBM277' => 'IBM277', 'IBM278' => 'IBM278', 'IBM280' => 'IBM280', 'IBM281' => 'IBM281', 'IBM284' => 'IBM284', 'IBM285' => 'IBM285', 'IBM290' => 'IBM290', 'IBM297' => 'IBM297', 'IBM420' => 'IBM420', 'IBM423' => 'IBM423', 'IBM424' => 'IBM424', 'IBM437' => 'IBM437', 'IBM500' => 'IBM500', 'IBM850' => 'IBM850', 'IBM851' => 'IBM851', 'IBM852' => 'IBM852', 'IBM855' => 'IBM855', 'IBM857' => 'IBM857', 'IBM860' => 'IBM860', 'IBM861' => 'IBM861', 'IBM862' => 'IBM862', 'IBM863' => 'IBM863', 'IBM864' => 'IBM864', 'IBM865' => 'IBM865', 'IBM866' => 'IBM866', 'IBM868' => 'IBM868', 'IBM869' => 'IBM869', 'IBM870' => 'IBM870', 'IBM871' => 'IBM871', 'IBM874' => 'IBM874', 'IBM875' => 'IBM875', 'IBM880' => 'IBM880', 'IBM891' => 'IBM891', 'IBM903' => 'IBM903', 'IBM904' => 'IBM904', 'IBM905' => 'IBM905', 'IBM918' => 'IBM918', 'IEC_P27-1' => 'IEC_P27_1', 'INIS-8' => 'INIS_8', 'INIS-CYRILLIC' => 'INIS_CYRILLIC', 'INIS' => 'INIS', 'ISO-8859-1' => 'ISO_8859_1', 'ISO-8859-10' => 'ISO_8859_10', 'ISO-8859-11' => 'ISO_8859_11', 'ISO-8859-13' => 'ISO_8859_13', 'ISO-8859-14' => 'ISO_8859_14', 'ISO-8859-15' => 'ISO_8859_15', 'ISO-8859-16' => 'ISO_8859_16', 'ISO-8859-2' => 'ISO_8859_2', 'ISO-8859-3' => 'ISO_8859_3', 'ISO-8859-4' => 'ISO_8859_4', 'ISO-8859-5' => 'ISO_8859_5', 'ISO-8859-6' => 'ISO_8859_6', 'ISO-8859-7' => 'ISO_8859_7', 'ISO-8859-8' => 'ISO_8859_8', 'ISO-8859-9' => 'ISO_8859_9', 'ISO_10367-BOX' => 'ISO_10367_BOX', 'ISO_2033-1983' => 'ISO_2033_1983', 'ISO_5427-EXT' => 'ISO_5427_EXT', 'ISO_5427' => 'ISO_5427', 'ISO_5428' => 'ISO_5428', 'KOI-8' => 'KOI_8', 'KOI8-R' => 'KOI8_R', 'KOI8-RU' => 'KOI8_RU', 'KOI8-T' => 'KOI8_T', 'KOI8-U' => 'KOI8_U', 'LATIN-GREEK-1' => 'LATIN_GREEK_1', 'LATIN-GREEK' => 'LATIN_GREEK', 'MACINTOSH' => 'MACINTOSH', 'MACARABIC' => 'MACARABIC', 'MACCYRILLIC' => 'MACCYRILLIC', 'MACCROATIAN' => 'MACCROATIAN', 'MACGREEK' => 'MACGREEK', 'MACHEBREW' => 'MACHEBREW', 'MACICELAND' => 'MACICELAND', 'MACROMANIA' => 'MACROMANIA', 'MACTHAI' => 'MACTHAI', 'MACTURKISH' => 'MACTURKISH', 'MACUKRAINE' => 'MACUKRAINE', 'MAC-IS' => 'MAC_IS', 'MAC-SAMI' => 'MAC_SAMI', 'MAC-UK' => 'MAC_UK', 'NATS-DANO' => 'NATS_DANO', 'NATS-SEFI' => 'NATS_SEFI', 'NEXTSTEP' => 'NEXTSTEP', 'TIS-620' => 'TIS_620', 'UTF-8' => 'UTF_8', 'VISCII' => 'VISCII', 'WIN-SAMI-2' => 'SAMI_WS2', 'WINDOWS-1250' => 'CP1250', 'WINDOWS-1251' => 'CP1251', 'WINDOWS-1252' => 'CP1252', 'WINDOWS-1253' => 'CP1253', 'WINDOWS-1254' => 'CP1254', 'WINDOWS-1256' => 'CP1256', 'WINDOWS-1257' => 'CP1257', 'US-ASCII' => 'US_ASCII', }; # These encodings are maybe available via Encode(3pm). $optional_conversions = { 'BIG5' => undef, 'BIG5-HKSCS' => undef, 'CN-GB' => undef, 'CN-GB-ISOIR165' => undef, 'CP1006' => undef, 'CP1026' => undef, 'CP1047' => undef, 'CP1361' => undef, 'CP949' => undef, 'CP37' => undef, 'CP424' => undef, 'CP500' => undef, 'CP737' => undef, 'CP775' => undef, 'CP856' => undef, 'CP874' => undef, 'CP875' => undef, 'CP932' => undef, 'CP936' => undef, 'CP950' => undef, 'EUC-JP' => undef, 'EUC-KR' => undef, 'EUC-TW' => undef, # mapping from 0xef to 0xff missing. # 'HP-ROMAN8' => undef, 'GB18030' => undef, 'HZ' => undef, 'IBM437' => undef, 'IBM850' => undef, 'IBM852' => undef, 'IBM855' => undef, 'IBM857' => undef, 'IBM860' => undef, 'IBM861' => undef, 'IBM862' => undef, 'IBM863' => undef, 'IBM864' => undef, 'IBM865' => undef, 'IBM866' => undef, 'IBM869' => undef, 'ISO-10646-UCS-2' => undef, 'ISO-10646-UCS-4' => undef, 'ISO-2022-JP' => undef, 'ISO-2022-JP-1' => undef, 'ISO-2022-KR' => undef, 'ISO-8859-1' => undef, 'ISO-8859-10' => undef, # This is broken in some versions of Encode. # 'ISO-8859-11' => undef, 'ISO-8859-13' => undef, 'ISO-8859-14' => undef, 'ISO-8859-15' => undef, # Errors at 0xa5 and 0xab. # 'ISO-8859-16' => undef, 'ISO-8859-2' => undef, 'ISO-8859-3' => undef, 'ISO-8859-4' => undef, 'ISO-8859-5' => undef, # Uses arabic digits in ascii range?! # 'ISO-8859-6' => undef, # 0xa1 and 0xa2 are incorrectly encoded. # 'ISO-8859-7' => undef, # 0xfd and 0xfe are missing. # 'ISO-8859-8' => undef, 'ISO-8859-9' => undef, 'ISO-IR-149' => undef, 'KOI8-R' => undef, # 0x95 is BULLET, not BULLET OPERATOR. # 'KOI8-U' => undef, # Seems to be messed up in certain Encode versions. # 'MACINTOSH' => undef, # TODO: Check other Mac encodings for correctness. # Nextstep is completely broken in my version of Encode. # 'NEXTSTEP' => undef, 'SHIFT_JIS' => undef, 'UCS-2BE' => undef, 'UCS-2LE' => undef, 'UCS-4BE' => undef, 'UCS-4LE' => undef, 'US-ASCII' => undef, 'UTF-16' => undef, 'UTF-16BE' => undef, 'UTF-16LE' => undef, 'UTF-32' => undef, 'UTF-32BE' => undef, 'UTF-32LE' => undef, 'UTF-8' => undef, # 0x86 is missing, 0xa6 is incorrectly encoded. # 'VISCII' => undef, 'WINDOWS-1250' => undef, 'WINDOWS-1251' => undef, 'WINDOWS-1252' => undef, 'WINDOWS-1253' => undef, 'WINDOWS-1254' => undef, 'WINDOWS-1255' => undef, 'WINDOWS-1256' => undef, 'WINDOWS-1257' => undef, 'WINDOWS-1258' => undef, }; my $has_encode; sub resolveAlias { my (undef, $encoding) = @_; $encoding = uc $encoding; return $encoding if exists $conversions->{$encoding}; return $encoding if exists $optional_conversions->{$encoding}; require Locale::Recode::_Aliases; my $resolved = Locale::Recode::_Aliases::ALIASES()->{$encoding}; return $resolved if $resolved; return; } sub isSupported { my ($class, $encoding) = @_; return unless defined $encoding && length $encoding; $encoding = uc $encoding; my $mimename = $class->resolveAlias ($encoding); return unless $mimename; # Determine the correct module. if (exists $optional_conversions->{$mimename}) { unless (defined $has_encode) { eval "require Encode"; $has_encode = !$@; if ($has_encode) { require Encode::Alias; # Add missing real names. Encode::Alias::define_alias (MS_KANJI => 'ShiftJIS'); Encode::Alias::define_alias ('CN-GB' => 'EUC-CN'); } } if ($has_encode) { # Now check whether Encode really supports that encoding. eval "Encode::encode ('$mimename', 'x')"; unless ($@) { $conversions->{$mimename} = '_Encode'; } delete $optional_conversions->{$mimename}; } } return $conversions->{$mimename} if exists $conversions->{$mimename}; return; } sub listSupported { my ($class) = @_; foreach my $opt (keys %$optional_conversions) { $class->isSupported ($opt); } my @list = keys %$conversions; return @list; } # Find a conversion path. sub findPath { my ($class, $from, $to) = @_; $from = 'INTERNAL' eq uc $from ? 'INTERNAL' : $class->resolveAlias ($from); $to = 'INTERNAL' eq uc $to ? 'INTERNAL' : $class->resolveAlias ($to); return unless $from && $to; return [] if $from eq $to; my $from_module = $class->isSupported ($from); my $to_module = $class->isSupported ($to); if (!$from_module) { if ('INTERNAL' eq $from) { $from_module = $to_module or return; } else { return; } } if (!$to_module) { if ('INTERNAL' eq $to) { $to_module = $from_module or return; } else { return; } } if ($from_module eq $to_module || $to eq 'INTERNAL' || $to eq 'UTF-8') { return [[ $from_module, $from, $to ]]; } elsif ($from eq 'INTERNAL') { return [[ $to_module, $from, $to ]]; } else { return [[ $from_module, $from, 'INTERNAL' ], [ $to_module, 'INTERNAL', $to ]]; } } # TODO: check for # 7bit-jis # AdobeStandardEncoding # AdobeSymbol # AdobeZdingbat # ascii-ctrl # big5ext # big5plus # cccii # cns11643-1 # cns11643-2 # cns11643-3 # cns11643-4 # cns11643-5 # cns11643-6 # cns11643-7 # cns11643-f # dingbats # gb12345-raw # gb2312-raw # gsm0338 # jis0201-raw # jis0208-raw # jis0212-raw # koi8-f # MIME-B # MIME-Header # MIME-Q # posix-bc # symbol # unisys 1; __END__ =head1 NAME Locale::Recode::_Conversions - Internal Table of Known Conversions =head1 SYNOPSIS use Locale::Recode::_Conversions This module is internal to libintl. Do not use it directly! =head1 AUTHOR Copyright (C) 2002-2017 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(3), 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: