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Perl version 5.10.0 documentation - Locale::Script

NAME

Locale::Script - ISO codes for script identification (ISO 15924)

SYNOPSIS

use Locale::Script;

use Locale::Constants;

$script

$code

$code3

$codeN

= code2script('ph');

= script2code('Tibetan');

= script2code('Tibetan',

LOCALE_CODE_ALPHA_3);

= script2code('Tibetan',

LOCALE_CODE_ALPHA_NUMERIC);

# 'Phoenician'

# 'bo'

# 'bod'

# 330

@codes

= all_script_codes();

@scripts = all_script_names();

DESCRIPTION

The

Locale::Script

module provides access to the ISO codes for identifying scripts, as defined in

ISO 15924. For example, Egyptian hieroglyphs are denoted by the two-letter code 'eg', the three-letter

code 'egy', and the numeric code 050.

You can either access the codes via the conversion routines (described below), or with the two

functions which return lists of all script codes or all script names.

There are three different code sets you can use for identifying scripts:

alpha-2

Two letter codes, such as 'bo' for Tibetan. This code set is identified with the symbol

LOCALE_CODE_ALPHA_2.

alpha-3

Three letter codes, such as 'ell' for Greek. This code set is identified with the symbol

LOCALE_CODE_ALPHA_3.

numeric

Numeric codes, such as 410 for Hiragana. This code set is identified with the symbol

LOCALE_CODE_NUMERIC.

All of the routines take an optional additional argument which specifies the code set to use. If not

specified, it defaults to the two-letter codes. This is partly for backwards compatibility (previous

versions of Locale modules only supported the alpha-2 codes), and partly because they are the most

widely used codes.

The alpha-2 and alpha-3 codes are not case-dependent, so you can use 'BO', 'Bo', 'bO' or 'bo' for

Tibetan. When a code is returned by one of the functions in this module, it will always be lower-case.

SPECIAL CODES

The standard defines various special codes.

The standard reserves codes in the ranges

qt, qaa

qat,

and

900

919,

for private use.

zx, zxx,

and

997,

are the codes for unwritten languages.

zy, zyy,

and

998,

are the codes for an undetermined script.

zz, zzz,

and

999,

are the codes for an uncoded script.

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The private codes are not recognised by Locale::Script, but the others are.

CONVERSION ROUTINES

There are three conversion routines:

code2script(), script2code(),

and

script_code2code().

code2script( CODE, [ CODESET ] )

This function takes a script code and returns a string which contains the name of the script

identified. If the code is not a valid script code, as defined by ISO 15924, then

undef

will be

returned:

$script = code2script('cy');

script2code( STRING, [ CODESET ] )

This function takes a script name and returns the corresponding script code, if such exists. If

the argument could not be identified as a script name, then

undef

will be returned:

$code = script2code('Gothic', LOCALE_CODE_ALPHA_3);

# $code will now be 'gth'

The case of the script name is not important. See the section

KNOWN BUGS AND

LIMITATIONS

below.

script_code2code( CODE, CODESET, CODESET )

This function takes a script code from one code set, and returns the corresponding code from

another code set.

$alpha2 = script_code2code('jwi',

LOCALE_CODE_ALPHA_3 => LOCALE_CODE_ALPHA_2);

# $alpha2 will now be 'jw' (Javanese)

If the code passed is not a valid script code in the first code set, or if there isn't a code for the

corresponding script in the second code set, then

undef

will be returned.

# Cyrillic

QUERY ROUTINES

There are two function which can be used to obtain a list of all codes, or all script names:

all_script_codes ( [ CODESET ] )

Returns a list of all two-letter script codes. The codes are guaranteed to be all lower-case, and

not in any particular order.

all_script_names ( [ CODESET ] )

Returns a list of all script names for which there is a corresponding script code in the specified

code set. The names are capitalised, and not returned in any particular order.

EXAMPLES

The following example illustrates use of the

code2script()

function. The user is prompted for a

script code, and then told the corresponding script name:

$| = 1;

# turn off buffering

print "Enter script code: ";

chop($code = <STDIN>);

$script = code2script($code, LOCALE_CODE_ALPHA_2);

if (defined $script)

{

print "$code = $script\n";

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Perl version 5.10.0 documentation - Locale::Script

}

else

{

print "'$code' is not a valid script code!\n";

}

KNOWN BUGS AND LIMITATIONS

When using

script2code(),

the script name must currently appear exactly as it does in the

source of the module. For example,

script2code('Egyptian hieroglyphs')

will return

eg,

as expected. But the following will all return

undef:

script2code('hieroglyphs')

script2code('Egyptian Hieroglypics')

If there's need for it, a future version could have variants for script names.

In the current implementation, all data is read in when the module is loaded, and then held in

memory. A lazy implementation would be more memory friendly.

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Constants.pdf (14 KB)
Country.pdf (38 KB)
Maketext.pdf (158 KB)
Currency.pdf (28 KB)
index.html (6 KB)

Script.pdf

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