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# 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?(c)
if $KCODE =~ /^s/i
c =~ /[\x81-\x9f\xe0-\xef][\x40-\x7e\x80-\xfc]/n
elsif $KCODE =~ /^e/i
c =~ /[\xa1-\xfe][\xa1-\xfe]/n
else
FALSE
end
end
def succ
if self[-2] && self[-2] & 0x80 != 0
s = self.dup
s[-1] += 1
s[-1] += 1 if !mbchar?(s)
return s
else
original_succ
end
end
def upto(to)
return if self > to
curr = self
tail = self[-2..-1]
if tail.length == 2 and tail =~ /^.$/ then
if self[0..-2] == to[0..-2]
first = self[-2].chr
for c in self[-1] .. to[-1]
if mbchar?(first+c.chr)
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
def _expand_ch
a = []
self.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 tr!(from, to)
return self.delete!(from) if to.length == 0
if from =~ /^\^/
comp=TRUE
from = $'
end
afrom = from._expand_ch
ato = to._expand_ch
i = 0
if comp
self.gsub!(/(.|\n)/) do |c|
unless afrom.include?(c)
ato[-1]
else
c
end
end
else
self.gsub!(/(.|\n)/) do |c|
if i = afrom.index(c)
if i < ato.size then ato[i] else ato[-1] end
else
c
end
end
end
end
def tr(from, to)
self.dup.tr!(from, to)
end
def delete!(del)
if del =~ /^\^/
comp=TRUE
del = $'
end
adel = del._expand_ch
if comp
self.gsub!(/(.|\n)/) do |c|
next unless adel.include?(c)
c
end
else
self.gsub!(/(.|\n)/) do |c|
next if adel.include?(c)
c
end
end
end
def delete(del)
self.dup.delete!(del)
end
def squeeze!(del=nil)
if del
if del =~ /^\^/
comp=TRUE
del = $'
end
adel = del._expand_ch
if comp
self.gsub!(/(.|\n)\1+/) do
next unless adel.include?($1)
$&
end
else
for c in adel
cq = Regexp.quote(c)
self.gsub!(/#{cq}(#{cq})+/, cq)
end
end
self
else
self.gsub!(/(.|\n)\1+/, '\1')
end
end
def squeeze(del=nil)
self.dup.squeeze!(del)
end
def tr_s!(from, to)
return self.delete!(from) if to.length == 0
if from =~ /^\^/
comp=TRUE
from = $'
end
afrom = from._expand_ch
ato = to._expand_ch
i = 0
c = nil
last = nil
self.gsub!(/(.|\n)/) do |c|
if comp
unless afrom.include?(c)
ato[-1]
else
c
end
elsif i = afrom.index(c)
c = if i < ato.size then ato[i] else ato[-1] end
next if c == last
last = c
else
last = nil
c
end
end
end
def tr_s(from, to)
self.dup.tr_s!(from,to)
end
alias original_chop! chop!
private :original_chop!
def chop!
if self =~ /(.)$/ and $1.size == 2
original_chop!
end
original_chop!
end
def chop
self.dup.chop!
end
end
$VERBOSE = $vsave
|