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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
# jcode.rb - ruby code to handle japanese (EUC/SJIS) string
$vsave, $VERBOSE = $VERBOSE, FALSE
class String
printf STDERR, "feel free for some warnings:\n" if $VERBOSE
def jlength
self.split(//).length
end
alias original_succ succ
private :original_succ
def mbchar?
case $KCODE[0]
when ?s, ?S
self =~ /[\x81-\x9f\xe0-\xef][\x40-\x7e\x80-\xfc]/n
when ?e, ?E
self =~ /[\xa1-\xfe][\xa1-\xfe]/n
else
false
end
end
def succ
if self[-2] and self[-2, 2].mbchar?
s = self.dup
s[-1] += 1
s[-1] += 1 unless s[-2, 2].mbchar?
return s
else
original_succ
end
end
def upto(to)
return if self > to
curr = self
tail = self[-2..-1]
if tail.length == 2 and tail =~ /^.$/ then
if self[0..-2] == to[0..-2]
first = self[-2].chr
for c in self[-1] .. to[-1]
if (first+c.chr).mbchar?
yield self[0..-2]+c.chr
end
end
end
else
loop do
yield curr
return if curr == to
curr = curr.succ
return if curr.length > to.length
end
end
return nil
end
private
def _expand_ch str
a = []
str.scan(/(.|\n)-(.|\n)|(.|\n)/) do |r|
if $3
a.push $3
elsif $1.length != $2.length
next
elsif $1.length == 1
$1[0].upto($2[0]) { |c| a.push c.chr }
else
$1.upto($2) { |c| a.push c }
end
end
a
end
def expand_ch_hash from, to
h = {}
afrom = _expand_ch(from)
ato = _expand_ch(to)
afrom.each_with_index do |x,i| h[x] = ato[i] || ato[-1] end
h
end
def bsquote(str)
str.gsub(/\\/, '\\\\\\\\')
end
HashCache = {}
TrPatternCache = {}
DeletePatternCache = {}
SqueezePatternCache = {}
public
def tr!(from, to)
return self.delete!(from) if to.length == 0
pattern = TrPatternCache[from] ||= /[#{bsquote(from)}]/
if from[0] == ?^
last = /.$/.match(to)[0]
self.gsub!(pattern, last)
else
h = HashCache[from + "::" + to] ||= expand_ch_hash(from, to)
self.gsub!(pattern) do |c| h[c] end
end
end
def tr(from, to)
(str = self.dup).tr!(from, to) or str
end
def delete!(del)
self.gsub!(DeletePatternCache[del] ||= /[#{bsquote(del)}]+/, '')
end
def delete(del)
(str = self.dup).delete!(del) or str
end
def squeeze!(del=nil)
pattern =
if del
SqueezePatternCache[del] ||= /([#{bsquote(del)}])\1+/
else
/(.|\n)\1+/
end
self.gsub!(pattern, '\1')
end
def squeeze(del=nil)
(str = self.dup).squeeze!(del) or str
end
def tr_s!(from, to)
return self.delete!(from) if to.length == 0
pattern = SqueezePatternCache[from] ||= /([#{bsquote(from)}])\1+"/
if from[0] == ?^
last = /.$/.match(to)[0]
self.gsub!(pattern, last)
else
h = HashCache[from + "::" + to] ||= expand_ch_hash(from, to)
self.gsub!(pattern) do h[$1] end
end
end
def tr_s(from, to)
(str = self.dup).tr_s!(from,to) or str
end
def chop!
self.gsub!(/(?:.|\r?\n)\z/, '')
end
def chop
(str = self.dup).chop! or str
end
def jcount(str)
self.delete("^#{str}").jlength
end
end
$VERBOSE = $vsave
|
