'Latin1' => 1252,
'Latin2' => 1250,
'Cyrillic' => 1251,
- 'Baltic' => 1257,
'Greek' => 1253,
'Turkish' => 1254,
'Hebrew' => 1255,
{
my $class = shift;
local $_ = shift;
+ # print "# findAlias $_\n";
unless (exists $alias{$_})
{
for (my $i=0; $i < @alias; $i += 2)
# More HP stuff.
define_alias( qr/^(?:hp-)?(arabic|greek|hebrew|kana|roman|thai|turkish)8$/i => '"${1}8"' );
+# The Official name of ASCII.
+define_alias( qr/^ANSI[-_]?X3\.4[-_]?1968$/i => '"ascii"' );
+
# This is a font issue, not an encoding issue.
# (The currency symbol of the Latin 1 upper half
# has been redefined as the euro symbol.)
define_alias( qr/^(?:iso[-_]?)?latin[-_]?(\d+)$/i => '"iso-8859-$latin2iso_num[$1]"' );
# Allow winlatin1 style names as well
-define_alias( qr/^win(latin[12]|cyrillic|baltic|greek|turkish|hebrew|arabic|baltic|vietnamese)$/i => '"cp$winlatin2cp{$1}"' );
+define_alias( qr/^win(latin[12]|cyrillic|baltic|greek|turkish|hebrew|arabic|baltic|vietnamese)$/i => '"cp$winlatin2cp{\u$1}"' );
# Common names for non-latin prefered MIME names
define_alias( 'ascii' => 'US-ascii',
# TODO: Hebrew encoding ISO-8859-8-1
# TODO: Thai encoding TCVN
# TODO: Korean encoding Johab
-# TODO: Vietnamese encodings VISCII VPS
+# TODO: Vietnamese encodings VPS
# TODO: Japanese encoding JIS (not the same as SJIS)
# TODO: Mac Asian+African encodings: Arabic Armenian Bengali Burmese
# ChineseSimp ChineseTrad Devanagari Ethiopic ExtArabic
{
return $name;
}
+ my $lc = lc $name;
if (exists $encoding{$name})
{
return $encoding{$name};
}
- else
+ if (exists $encoding{$lc})
{
- return $class->findAlias($name);
+ return $encoding{$lc};
}
+
+ my $oc = $class->findAlias($name);
+ return $oc if defined $oc;
+ return $class->findAlias($lc) if $lc ne $name;
+
+ return;
}
sub find_encoding
my $enc = find_encoding($name);
croak("Unknown encoding '$name'") unless defined $enc;
my $string = $enc->decode($octets,$check);
- return undef if ($check && length($octets));
+ $_[1] = $octets if $check;
return $string;
}
=over 4
-=item * The MIME name as defined in IETF RFC-XXXX.
+=item * The MIME name as defined in IETF RFCs.
=item * The name in the IANA registry.
-=item * The name used by the the organization that defined it.
+=item * The name used by the organization that defined it.
=back
encodings have state C<Encode> uses the encoding object internally
once an operation is in progress.
+As of Perl 5.8.0, at least the following encodings are recognized
+(the => marks aliases):
+
+ ASCII
+
+ US-ASCII => ASCII
+
+The Unicode:
+
+ UTF-8
+ UTF-16
+ UCS-2
+
+ ISO 10646-1 => UCS-2
+
+The ISO 8859 and KOI:
+
+ ISO 8859-1 ISO 8859-6 ISO 8859-11 KOI8-F
+ ISO 8859-2 ISO 8859-7 (12 doesn't exist) KOI8-R
+ ISO 8859-3 ISO 8859-8 ISO 8859-13 KOI8-U
+ ISO 8859-4 ISO 8859-9 ISO 8859-14
+ ISO 8859-5 ISO 8859-10 ISO 8859-15
+ ISO 8859-16
+
+ Latin1 => 8859-1 Latin6 => 8859-10
+ Latin2 => 8859-2 Latin7 => 8859-13
+ Latin3 => 8859-3 Latin8 => 8859-14
+ Latin4 => 8859-4 Latin9 => 8859-15
+ Latin5 => 8859-9 Latin10 => 8859-16
+
+ Cyrillic => 8859-5
+ Arabic => 8859-6
+ Greek => 8859-7
+ Hebrew => 8859-8
+ Thai => 8859-11
+ TIS620 => 8859-11
+
+The CJKV: Chinese, Japanese, Korean, Vietnamese:
+
+ ISO 2022 ISO 2022 JP-1 JIS 0201 GB 1988 Big5 EUC-CN
+ ISO 2022 CN ISO 2022 JP-2 JIS 0208 GB 2312 HZ EUC-JP
+ ISO 2022 JP ISO 2022 KR JIS 0210 GB 12345 CNS 11643 EUC-JP-0212
+ Shift-JIS EUC-KR
+ VISCII
+
+The PC codepages:
+
+ CP37 CP852 CP861 CP866 CP949 CP1251 CP1256
+ CP424 CP855 CP862 CP869 CP950 CP1252 CP1257
+ CP737 CP856 CP863 CP874 CP1006 CP1253 CP1258
+ CP775 CP857 CP864 CP932 CP1047 CP1254
+ CP850 CP860 CP865 CP936 CP1250 CP1255
+
+ WinLatin1 => CP1252
+ WinLatin2 => CP1250
+ WinCyrillic => CP1251
+ WinGreek => CP1253
+ WinTurkiskh => CP1254
+ WinHebrew => CP1255
+ WinArabic => CP1256
+ WinBaltic => CP1257
+ WinVietnamese => CP1258
+
+(All the CPI<NNN...> are available also as IBMI<NNN...>.)
+
+The Mac codepages:
+
+ MacCentralEuropean MacJapanese
+ MacCroatian MacRoman
+ MacCyrillic MacRumanian
+ MacDingbats MacSami
+ MacGreek MacThai
+ MacIcelandic MacTurkish
+ MacUkraine
+
+Miscellaneous:
+
+ 7bit-greek IR-197
+ 7bit-kana NeXTstep
+ 7bit-latin1 POSIX-BC
+ DingBats Roman8
+ GSM 0338 Symbol
+
=head1 PERL ENCODING API
=head2 Generic Encoding Interface
=head2 Other Encodings of Unicode
UTF-16 is similar to UCS-2, 16 bit or 2-byte chunks. UCS-2 can only
-represent 0..0xFFFF, while UTF-16 has a "surrogate pair" scheme which
+represent 0..0xFFFF, while UTF-16 has a I<surrogate pair> scheme which
allows it to cover the whole Unicode range.
+Surrogates are code points set aside to encode the 0x01000..0x10FFFF
+range of Unicode code points in pairs of 16-bit units. The I<high
+surrogates> are the range 0xD800..0xDBFF, and the I<low surrogates>
+are the range 0xDC00..0xDFFFF. The surrogate encoding is
+
+ $hi = ($uni - 0x10000) / 0x400 + 0xD800;
+ $lo = ($uni - 0x10000) % 0x400 + 0xDC00;
+
+and the decoding is
+
+ $uni = 0x10000 + ($hi - 0xD8000) * 0x400 + ($lo - 0xDC00);
+
Encode implements big-endian UCS-2 aliased to "iso-10646-1" as that
happens to be the name used by that representation when used with X11
fonts.
See L<PerlIO> for more information.
+See also L<encoding> for how to change the default encoding of the
+data in your script.
+
=head1 Encoding How to ...
To do:
=head1 SEE ALSO
-L<perlunicode>, L<perlebcdic>, L<perlfunc/open>, L<PerlIO>
+L<perlunicode>, L<perlebcdic>, L<perlfunc/open>, L<PerlIO>, L<encoding>
=cut
projects / p5sagit/p5-mst-13.2.git / blobdiff