1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
# -*- encoding: utf-8 -*-
module UnicodeUtils
# Derives the canonical decomposition of the given Hangul syllable.
#
# Example:
#
# require "unicode_utils/hangul_syllable_decomposition"
# UnicodeUtils.hangul_syllable_decomposition("\u{d4db}") => "\u{1111}\u{1171}\u{11b6}"
def hangul_syllable_decomposition(char)
String.new.force_encoding(char.encoding).tap do |str|
Impl.append_hangul_syllable_decomposition(str , char.ord)
end
end
module_function :hangul_syllable_decomposition
module Impl # :nodoc:
def self.append_hangul_syllable_decomposition(str, s)
# constants
sbase = 0xAC00
lbase = 0x1100
vbase = 0x1161
tbase = 0x11A7
scount = 11172
lcount = 19
vcount = 21
tcount = 28
ncount = vcount * tcount
sindex = s - sbase
if 0 <= sindex && sindex < scount
l = lbase + sindex / ncount
v = vbase + (sindex % ncount) / tcount
t = tbase + sindex % tcount
str << l << v
str << t if t != tbase
else
str << s
end
end
end
end
|
