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#
# kconv.rb - Kanji Converter.
#
# $Id$
#
require 'nkf'
module Kconv
#
# Public Constants
#
#Constant of Encoding
AUTO = ::NKF::AUTO
JIS = ::NKF::JIS
EUC = ::NKF::EUC
SJIS = ::NKF::SJIS
BINARY = ::NKF::BINARY
NOCONV = ::NKF::NOCONV
ASCII = ::NKF::ASCII
UTF8 = ::NKF::UTF8
UTF16 = ::NKF::UTF16
UTF32 = ::NKF::UTF32
UNKNOWN = ::NKF::UNKNOWN
#
# Private Constants
#
REVISION = %q$Revision$
#Regexp of Encoding
RegexpShiftjis = /\A(?:
[\x00-\x7f\xa1-\xdf] |
[\x81-\x9f\xe0-\xfc][\x40-\x7e\x80-\xfc]
)*\z/nx
RegexpEucjp = /\A(?:
[\x00-\x7f] |
\x8e [\xa1-\xdf] |
\x8f [\xa1-\xdf] [\xa1-\xfe] |
[\xa1-\xdf] [\xa1-\xfe]
)*\z/nx
RegexpUtf8 = /\A(?:
[\x00-\x7f] |
[\xc2-\xdf] [\x80-\xbf] |
\xe0 [\xa0-\xbf] [\x80-\xbf] |
[\xe1-\xef] [\x80-\xbf] [\x80-\xbf] |
\xf0 [\x90-\xbf] [\x80-\xbf] [\x80-\xbf] |
[\xf1-\xf3] [\x80-\xbf] [\x80-\xbf] [\x80-\xbf] |
\xf4 [\x80-\x8f] [\x80-\xbf] [\x80-\xbf]
)*\z/nx
# SYMBOL_TO_OPTION is the table for Kconv#conv
# Kconv#conv is intended to generic convertion method,
# so this table specifies symbols which can be supported not only nkf...
SYMBOL_TO_OPTION = {
:iso2022jp => '-j',
:jis => '-j',
:eucjp => '-e',
:euc => '-e',
:eucjpms => '-e --cp932',
:shiftjis => '-s',
:sjis => '-s',
:cp932 => '-s --cp932',
:windows31j => '-s --cp932',
:utf8 => '-w',
:utf8bom => '-w8',
:utf8n => '-w80',
:utf8mac => '-w --utf8mac-input',
:utf16 => '-w16',
:utf16be => '-w16B',
:utf16ben => '-w16B0',
:utf16le => '-w16L',
:utf16len => '-w16L0',
:lf => '-Lu', # LF
:cr => '-Lm', # CR
:crlf => '-Lw', # CRLF
}
CONSTANT_TO_SYMBOL = {
JIS => :iso2022jp,
EUC => :eucjp,
SJIS => :shiftjis,
BINARY => :binary,
NOCONV => :noconv,
ASCII => :ascii,
UTF8 => :utf8,
UTF16 => :utf16,
UTF32 => :utf32,
UNKNOWN => :unknown
}
#
# Public Methods
#
#
# Kconv.conv( str, :to => :"euc-jp", :from => :shift_jis, :opt => [:hiragana, :katakana] )
#
def conv(str, *args)
option = nil
if args[0].is_a? Hash
option = [
args[0][:to]||args[0]['to'],
args[0][:from]||args[0]['from'],
args[0][:opt]||args[0]['opt'] ]
elsif args[0].is_a? String or args[0].is_a? Symbol or args[0].is_a? Integer
option = args
else
return str
end
to = symbol_to_option(option[0])
from = symbol_to_option(option[1]).to_s.sub(/(-[jesw])/o){$1.upcase}
opt = option[2..-1] and opt = opt.flatten.map{|x|symbol_to_option(x)}.compact.join(' ')
nkf_opt = '-x -m0 %s %s %s' % [to, from, opt]
result = ::NKF::nkf( nkf_opt, str)
end
alias :kconv :conv
#
# Encode to
#
def tojis(str)
::NKF::nkf('-j', str)
end
def toeuc(str)
::NKF::nkf('-e', str)
end
def tosjis(str)
::NKF::nkf('-s', str)
end
def toutf8(str)
::NKF::nkf('-w', str)
end
def toutf16(str)
::NKF::nkf('-w16', str)
end
alias :to_jis :tojis
alias :to_euc :toeuc
alias :to_eucjp :toeuc
alias :to_sjis :tosjis
alias :to_shiftjis :tosjis
alias :to_iso2022jp :tojis
alias :to_utf8 :toutf8
alias :to_utf16 :toutf16
#
# guess
#
def guess(str)
::NKF::guess(str)
end
def guess_old(str)
::NKF::guess1(str)
end
def guess_as_symbol(str)
CONSTANT_TO_SYMBOL[guess(str)]
end
#
# isEncoding
#
def iseuc(str)
RegexpEucjp.match( str )
end
def issjis(str)
RegexpShiftjis.match( str )
end
def isutf8(str)
RegexpUtf8.match( str )
end
#
# encoding?
#
def eucjp?(str)
RegexpEucjp.match( str ) ? true : false
end
def shiftjis?(str)
RegexpShiftjis.match( str ) ? true : false
end
def utf8?(str)
RegexpUtf8.match( str ) ? true : false
end
alias :euc? :eucjp?
alias :sjis? :shiftjis?
#
# Private Methods
#
def symbol_to_option(symbol)
if symbol.is_a? Integer
symbol = CONSTANT_TO_SYMBOL[symbol]
elsif symbol.to_s[0] == ?-
return symbol.to_s
end
begin
SYMBOL_TO_OPTION[ symbol.to_s.downcase.delete('-_').to_sym ]
rescue
return nil
end
end
#
# Make them module functions
#
module_function(*instance_methods(false))
private_class_method :symbol_to_option
end
class String
def kconv(*args)
Kconv::kconv(self, *args)
end
def conv(*args)
Kconv::conv(self, *args)
end
# to Encoding
def tojis
::NKF::nkf('-j', self)
end
def toeuc
::NKF::nkf('-e', self)
end
def tosjis
::NKF::nkf('-s', self)
end
def toutf8
::NKF::nkf('-w', self)
end
def toutf16
::NKF::nkf('-w16', self)
end
alias :to_jis :tojis
alias :to_euc :toeuc
alias :to_eucjp :toeuc
alias :to_sjis :tosjis
alias :to_shiftjis :tosjis
alias :to_iso2022jp :tojis
alias :to_utf8 :toutf8
alias :to_utf16 :toutf16
# is Encoding
def iseuc; Kconv.iseuc( self ) end
def issjis; Kconv.issjis( self ) end
def isutf8; Kconv.isutf8( self ) end
def eucjp?; Kconv.eucjp?( self ) end
def shiftjis?;Kconv.shiftjis?( self ) end
def utf8?; Kconv.utf8?( self ) end
alias :euc? :eucjp?
alias :sjis? :shiftjis?
def guess_as_symbol; Kconv.guess_as_symbol( self ) end
end
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