4 our $VERSION = do { my @r = (q$Revision: 1.0 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
8 our @ISA = qw(Exporter);
10 # Public, encouraged API is exported by default
18 our @Alias; # ordered matching list
19 our %Alias; # cached known aliases
25 unless (exists $Alias{$_})
27 for (my $i=0; $i < @Alias; $i += 2)
29 my $alias = $Alias[$i];
30 my $val = $Alias[$i+1];
32 if (ref($alias) eq 'Regexp' && $_ =~ $alias)
34 $DEBUG and warn "eval $val";
36 # $@ and warn "$val, $@";
38 elsif (ref($alias) eq 'CODE')
40 $DEBUG and warn "$alias", "->", "($val)";
41 $new = $alias->($val);
43 elsif (lc($_) eq lc($alias))
49 next if $new eq $_; # avoid (direct) recursion on bugs
50 $DEBUG and warn "$alias, $new";
51 my $enc = (ref($new)) ? $new : Encode::find_encoding($new);
62 if (my $e = $Alias{$_}){
67 warn "find_alias($class, $_)->name = $name";
76 my ($alias,$name) = splice(@_,0,2);
77 unshift(@Alias, $alias => $name); # newer one has precedence
78 # clear %Alias cache to allow overrides
82 if (ref($alias) eq 'Regexp' && $k =~ $alias)
84 $DEBUG and warn "delete \$Alias\{$k\}";
87 elsif (ref($alias) eq 'CODE')
89 $DEBUG and warn "delete \$Alias\{$k\}";
90 delete $Alias{$alias->($name)};
94 $DEBUG and warn "delete \$Alias\{$alias\}";
95 delete $Alias{$alias};
100 # Allow latin-1 style names as well
101 # 0 1 2 3 4 5 6 7 8 9 10
102 our @Latin2iso = ( 0, 1, 2, 3, 4, 9, 10, 13, 14, 15, 16 );
103 # Allow winlatin1 style names as well
113 'vietnamese' => 1258,
126 # 'C' => 'US-ascii' so you can feed default locale directly.
127 define_alias('C' => 'US-ascii');
128 # Allow variants of iso-8859-1 etc.
129 define_alias( qr/\biso[-_]?(\d+)[-_](\d+)$/i => '"iso-$1-$2"' );
131 # At least HP-UX has these.
132 define_alias( qr/\biso8859(\d+)$/i => '"iso-8859-$1"' );
135 define_alias( qr/\b(?:hp-)?(arabic|greek|hebrew|kana|roman|thai|turkish)8$/i => '"${1}8"' );
137 # The Official name of ASCII.
138 define_alias( qr/\bANSI[-_]?X3\.4[-_]?1968$/i => '"ascii"' );
140 # This is a font issue, not an encoding issue.
141 # (The currency symbol of the Latin 1 upper half
142 # has been redefined as the euro symbol.)
143 define_alias( qr/^(.+)\@euro$/i => '"$1"' );
145 define_alias( qr/\b(?:iso[-_]?)?latin[-_]?(\d+)$/i
146 => '"iso-8859-$Encode::Alias::Latin2iso[$1]"' );
148 define_alias( qr/\bwin(latin[12]|cyrillic|baltic|greek|turkish|
149 hebrew|arabic|baltic|vietnamese)$/ix =>
150 '"cp" . $Encode::Alias::Winlatin2cp{lc($1)}' );
152 # Common names for non-latin prefered MIME names
153 define_alias( 'ascii' => 'US-ascii',
154 'cyrillic' => 'iso-8859-5',
155 'arabic' => 'iso-8859-6',
156 'greek' => 'iso-8859-7',
157 'hebrew' => 'iso-8859-8',
158 'thai' => 'iso-8859-11',
159 'tis620' => 'iso-8859-11',
162 # At least AIX has IBM-NNN (surprisingly...) instead of cpNNN.
163 # And Microsoft has their own naming (again, surprisingly).
164 # And windows-* is registered in IANA!
165 define_alias( qr/\b(?:ibm|ms|windows)[-_]?(\d\d\d\d?)$/i => '"cp$1"');
167 # Sometimes seen with a leading zero.
168 define_alias( qr/\bcp037\b/i => '"cp37"');
171 define_alias( qr/\bmacRomanian$/i => '"macRumanian"');
173 # Standardize on the dashed versions.
174 # define_alias( qr/\butf8$/i => 'utf-8' );
175 define_alias( qr/\bkoi8r$/i => 'koi8-r' );
176 define_alias( qr/\bkoi8u$/i => 'koi8-u' );
178 unless ($Encode::ON_EBCDIC){
180 define_alias( qr/\beuc.*cn$/i => '"euc-cn"' );
181 define_alias( qr/\bcn.*euc$/i => '"euc-cn"' );
182 # define_alias( qr/\bGB[- ]?(\d+)$/i => '"euc-cn"' )
183 # CP936 doesn't have vendor-addon for GBK, so they're identical.
184 define_alias( qr/^gbk$/i => '"cp936"');
185 # This fixes gb2312 vs. euc-cn confusion, practically
186 define_alias( qr/\bGB[-_ ]?2312(?:\D.*$|$)/i => '"euc-cn"' );
188 define_alias( qr/\bjis$/i => '"7bit-jis"' );
189 define_alias( qr/\beuc.*jp$/i => '"euc-jp"' );
190 define_alias( qr/\bjp.*euc$/i => '"euc-jp"' );
191 define_alias( qr/\bujis$/i => '"euc-jp"' );
192 define_alias( qr/\bshift.*jis$/i => '"shiftjis"' );
193 define_alias( qr/\bsjis$/i => '"shiftjis"' );
195 define_alias( qr/\beuc.*kr$/i => '"euc-kr"' );
196 define_alias( qr/\bkr.*euc$/i => '"euc-kr"' );
197 # This fixes ksc5601 vs. euc-kr confusion, practically
198 define_alias( qr/(?:x-)?uhc$/i => '"cp949"' );
199 define_alias( qr/(?:x-)?windows-949$/i => '"cp949"' );
200 define_alias( qr/\bks_c_5601-1987$/i => '"cp949"' );
202 define_alias( qr/\bbig-?5$/i => '"big5"' );
203 define_alias( qr/\bbig5-hk(?:scs)?$/i => '"big5-hkscs"' );
206 # At last, Map white space and _ to '-'
207 define_alias( qr/^(\S+)[\s_]+(.*)$/i => '"$1-$2"' );
213 # TODO: HP-UX '8' encodings arabic8 greek8 hebrew8 kana8 thai8 turkish8
214 # TODO: HP-UX '15' encodings japanese15 korean15 roi15
215 # TODO: Cyrillic encoding ISO-IR-111 (useful?)
216 # TODO: Armenian encoding ARMSCII-8
217 # TODO: Hebrew encoding ISO-8859-8-1
218 # TODO: Thai encoding TCVN
219 # TODO: Vietnamese encodings VPS
220 # TODO: Mac Asian+African encodings: Arabic Armenian Bengali Burmese
221 # ChineseSimp ChineseTrad Devanagari Ethiopic ExtArabic
222 # Farsi Georgian Gujarati Gurmukhi Hebrew Japanese
223 # Kannada Khmer Korean Laotian Malayalam Mongolian
224 # Oriya Sinhalese Symbol Tamil Telugu Tibetan Vietnamese
228 Encode::Alias - alias defintions to encodings
234 define_alias( newName => ENCODING);
238 Allows newName to be used as am alias for ENCODING. ENCODING may be
239 either the name of an encoding or and encoding object (as described in L<Encode>).
241 Currently I<newName> can be specified in the following ways:
245 =item As a simple string.
247 =item As a qr// compiled regular expression, e.g.:
249 define_alias( qr/^iso8859-(\d+)$/i => '"iso-8859-$1"' );
251 In this case if I<ENCODING> is not a reference it is C<eval>-ed to
252 allow C<$1> etc. to be subsituted. The example is one way to names as
253 used in X11 font names to alias the MIME names for the iso-8859-*
254 family. Note the double quote inside the single quote.
256 If you are using regex here, you have to do so or it won't work in
257 this case. Also not regex is tricky even for the experienced. Use it
260 =item As a code reference, e.g.:
262 define_alias( sub { return /^iso8859-(\d+)$/i ? "iso-8859-$1" : undef } , '');
264 In this case C<$_> will be set to the name that is being looked up and
265 I<ENCODING> is passed to the sub as its first argument. The example
266 is another way to names as used in X11 font names to alias the MIME
267 names for the iso-8859-* family.
271 =head2 Alias overloading
273 You can override predefined aliases by simply applying define_alias().
274 New alias is always evaluated first and when neccessary define_alias()
275 flushes internal cache to make new definition available.
277 # redirect SHIFT_JIS to MS/IBM Code Page 932, which is a
278 # superset of SHIFT_JIS
280 define_alias( qr/shift.*jis$/i => '"cp932"' );
281 define_alias( qr/sjis$/i => '"cp932"' );
283 If you want to zap all predefined aliases, you can
285 Encode::Alias->undef_aliases;
289 Encode::Alias->init_aliases;
291 gets factory setting back.
296 L<Encode>, L<Encode::Supported>