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=head1 NAME |
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|
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Char::Normalize::FullwidthHalfwidth - Fullwidth/halfwidth character |
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normalization |
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|
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=head1 SYNOPSIS |
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|
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use Char::Normalize::FullwidthHalfwidth qw/normalize_width/; |
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|
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$s = <>; |
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normalize_width (\$s); |
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print $s; |
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|
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=head1 DESCRIPTION |
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|
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The C<Char::Normalize::FullwidthHalfwidth> module provides a function |
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that normalizes fullwidth/halfwidth compatibility characters into |
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their canonical representations. |
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|
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=head1 FUNCTION |
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|
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This module provides a function, C<normalize_width>. It can be |
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imported to a package by standard C<Exporter> method, as: |
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|
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use Char::Normalize::FullwidthHalfwidth qw/normalize_width/; |
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|
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Note that the C<use> statement does not export anything unless the |
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function name was explicitly specified. |
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|
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Alternatively, you can invoke the function in its fully qualified form |
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as: |
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|
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require Char::Normalize::FullwidthHalfwidth; |
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Char::Normalize::FullwidthHalfwidth::normalize_width (\$scalarref); |
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|
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=over 4 |
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|
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=item C<normalize_width (I<$scalarref>)> |
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|
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Normalize the fullwidth/halfwidth characters in the scalar referenced |
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by the argument into their preferable form. The argument must be a |
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scalar reference. The scalar is treated as a character string |
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(possibly with the utf8 flag set), not a byte string. The function |
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returns the scalar reference. |
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|
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The function performs the following conversions: |
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|
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=over 4 |
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|
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=item A character C<U+3000> C<IDEOGRAPHIC SPACE> (so-called fullwidth space) |
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|
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Replaced by a C<U+0020> C<SPACE> (so-called halfwidth space) |
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character. |
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|
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=item Characters in the range C<U+FF01>..C<U+FF5E> (so-called fullwidth ASCII characters) |
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|
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Replaced by a character in the range C<U+0021>..C<U+007E> (so-called |
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halfwidth ASCII characters). |
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|
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=item Characters in the range C<U+FF61>..C<U+FF9F> (halfwidth Katakana) |
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|
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Replaced by a corresponding so-called fullwidth Katakana (or |
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ideographic punctuation). Note that C<U+FF9E> C<HALFWIDTH KATAKANA |
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VOICED SOUND MARK> and C<U+FF9F> C<HALFWIDTH KATAKANA SEMI-VOICED |
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SOUND MARK> are replaced by C<U+3099> C<COMBINING KATAKANA-HIRAGANA |
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VOICED SOUND MARK> and C<U+309A> C<COMBINING KATAKANA-HIRAGANA |
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SEMI-VOICED SOUND MARK> respectively, not their spacing variants. |
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|
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=item Characters in the range C<U+FFE0>..C<U+FFE6> (fullwidth symbols) |
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|
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Replaced by a corresponding canonical character. |
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|
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=back |
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|
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=back |
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|
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=head1 BUGS |
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|
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Not all compatibility characters in the fullwidth and halfwidth block |
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of the Unicode Standard are currently supported - especially, |
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halfwidth Hangul syllables are not converted to their fullwidth |
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equivalents. A future version of this module is expected to address |
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this issue by extending the conversion table. |
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|
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=head1 AUTHOR |
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|
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Wakaba <[email protected]>. |
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|
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=head1 HISTORY |
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|
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This module was originally developed as part of SuikaWiki |
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L<http://suika.fam.cx/~wakaba/wiki/sw/n/SuikaWiki>. |
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|
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=head1 LICENSE |
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|
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Copyright 2008 Wakaba <[email protected]> |
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|
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This program is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. |
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|
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=cut |
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|
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## $Date: 2008/10/21 07:51:59 $ |
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