Convert::EastAsianWidth - Convert between full/half-width ASCII characters
This document describes version 1.01 of Convert:EastAsianWidth, released November 7, 2010.
# Exports to_fullwidth() and to_halfwidth() by default use Convert::EastAsianWidth; my $u = to_fullwidth('ABC'); # Full-width variant of 'ABC' my $b = to_fullwidth('ABC', 'big5'); # Ditto, but in big5 encoding my $x = to_halfwidth($u); # Gets back 'ABC' my $y = to_halfwidth($b, 'big5'); # Same as above
This module efficiently convert between full- and half-width ASCII characters, including alphanumerics and punctuations.
The first argument is the string to be converted; the second one represents the input and encodings. If omitted, both are assumed to be Unicode strings.
This module does not handle conversion of full/half width katakana, which is a slightly more complicated problem because of the need to incorporate diacritics.
Many thanks to BKB for the disclaimer above and for suggesting a more efficient conversion algorithm based on
To the extent possible under law, 唐鳳 has waived all copyright and related or neighboring rights to Convert-EastAsianWidth.
This work is published from Taiwan.