JezK
Edit File: charset.rb
# XSD4R - Charset handling library. # Copyright (C) 2001, 2003, 2005 NAKAMURA, Hiroshi <nahi@ruby-lang.org>. # This program is copyrighted free software by NAKAMURA, Hiroshi. You can # redistribute it and/or modify it under the same terms of Ruby's license; # either the dual license version in 2003, or any later version. module XSD module Charset @internal_encoding = $KCODE class XSDError < StandardError; end class CharsetError < XSDError; end class UnknownCharsetError < CharsetError; end class CharsetConversionError < CharsetError; end public ### ## Maps # EncodingConvertMap = {} def Charset.init EncodingConvertMap[['UTF8', 'X_ISO8859_1']] = Proc.new { |str| str.unpack('U*').pack('C*') } EncodingConvertMap[['X_ISO8859_1', 'UTF8']] = Proc.new { |str| str.unpack('C*').pack('U*') } begin require 'xsd/iconvcharset' @internal_encoding = 'UTF8' sjtag = (/(mswin|bccwin|mingw|cygwin|emx)/ =~ RUBY_PLATFORM) ? 'cp932' : 'shift_jis' EncodingConvertMap[['UTF8', 'EUC' ]] = Proc.new { |str| IconvCharset.safe_iconv("euc-jp", "utf-8", str) } EncodingConvertMap[['EUC' , 'UTF8']] = Proc.new { |str| IconvCharset.safe_iconv("utf-8", "euc-jp", str) } EncodingConvertMap[['EUC' , 'SJIS']] = Proc.new { |str| IconvCharset.safe_iconv(sjtag, "euc-jp", str) } EncodingConvertMap[['UTF8', 'SJIS']] = Proc.new { |str| IconvCharset.safe_iconv(sjtag, "utf-8", str) } EncodingConvertMap[['SJIS', 'UTF8']] = Proc.new { |str| IconvCharset.safe_iconv("utf-8", sjtag, str) } EncodingConvertMap[['SJIS', 'EUC' ]] = Proc.new { |str| IconvCharset.safe_iconv("euc-jp", sjtag, str) } rescue LoadError begin require 'nkf' EncodingConvertMap[['EUC' , 'SJIS']] = Proc.new { |str| NKF.nkf('-sXm0', str) } EncodingConvertMap[['SJIS', 'EUC' ]] = Proc.new { |str| NKF.nkf('-eXm0', str) } rescue LoadError end begin require 'uconv' @internal_encoding = 'UTF8' EncodingConvertMap[['UTF8', 'EUC' ]] = Uconv.method(:u8toeuc) EncodingConvertMap[['UTF8', 'SJIS']] = Uconv.method(:u8tosjis) EncodingConvertMap[['EUC' , 'UTF8']] = Uconv.method(:euctou8) EncodingConvertMap[['SJIS', 'UTF8']] = Uconv.method(:sjistou8) rescue LoadError end end end self.init CharsetMap = { 'NONE' => 'us-ascii', 'EUC' => 'euc-jp', 'SJIS' => 'shift_jis', 'UTF8' => 'utf-8', 'X_ISO_8859_1' => 'iso-8859-1', 'X_UNKNOWN' => nil, } ### ## handlers # def Charset.encoding @internal_encoding end def Charset.encoding=(encoding) warn("xsd charset is set to #{encoding}") if $DEBUG @internal_encoding = encoding end def Charset.xml_encoding_label charset_label(@internal_encoding) end def Charset.encoding_to_xml(str, charset) encoding_conv(str, @internal_encoding, charset_str(charset)) end def Charset.encoding_from_xml(str, charset) encoding_conv(str, charset_str(charset), @internal_encoding) end def Charset.encoding_conv(str, enc_from, enc_to) if enc_from == enc_to or enc_from == 'NONE' or enc_to == 'NONE' str elsif converter = EncodingConvertMap[[enc_from, enc_to]] converter.call(str) else raise CharsetConversionError.new( "Converter not found: #{enc_from} -> #{enc_to}") end end def Charset.charset_label(encoding) CharsetMap[encoding.upcase] end def Charset.charset_str(label) if CharsetMap.respond_to?(:key) CharsetMap.key(label.downcase) || 'X_UNKNOWN' else CharsetMap.index(label.downcase) || 'X_UNKNOWN' end end # us_ascii = '[\x00-\x7F]' us_ascii = '[\x9\xa\xd\x20-\x7F]' # XML 1.0 restricted. USASCIIRegexp = Regexp.new("\\A#{us_ascii}*\\z", nil, "NONE") twobytes_euc = '(?:[\x8E\xA1-\xFE][\xA1-\xFE])' threebytes_euc = '(?:\x8F[\xA1-\xFE][\xA1-\xFE])' character_euc = "(?:#{us_ascii}|#{twobytes_euc}|#{threebytes_euc})" EUCRegexp = Regexp.new("\\A#{character_euc}*\\z", nil, "NONE") # onebyte_sjis = '[\x00-\x7F\xA1-\xDF]' onebyte_sjis = '[\x9\xa\xd\x20-\x7F\xA1-\xDF]' # XML 1.0 restricted. twobytes_sjis = '(?:[\x81-\x9F\xE0-\xFC][\x40-\x7E\x80-\xFC])' character_sjis = "(?:#{onebyte_sjis}|#{twobytes_sjis})" SJISRegexp = Regexp.new("\\A#{character_sjis}*\\z", nil, "NONE") # 0xxxxxxx # 110yyyyy 10xxxxxx twobytes_utf8 = '(?:[\xC0-\xDF][\x80-\xBF])' # 1110zzzz 10yyyyyy 10xxxxxx threebytes_utf8 = '(?:[\xE0-\xEF][\x80-\xBF][\x80-\xBF])' # 11110uuu 10uuuzzz 10yyyyyy 10xxxxxx fourbytes_utf8 = '(?:[\xF0-\xF7][\x80-\xBF][\x80-\xBF][\x80-\xBF])' character_utf8 = "(?:#{us_ascii}|#{twobytes_utf8}|#{threebytes_utf8}|#{fourbytes_utf8})" UTF8Regexp = Regexp.new("\\A#{character_utf8}*\\z", nil, "NONE") def Charset.is_us_ascii(str) USASCIIRegexp =~ str end def Charset.is_utf8(str) UTF8Regexp =~ str end def Charset.is_euc(str) EUCRegexp =~ str end def Charset.is_sjis(str) SJISRegexp =~ str end def Charset.is_ces(str, code = @internal_encoding) case code when 'NONE' is_us_ascii(str) when 'UTF8' is_utf8(str) when 'EUC' is_euc(str) when 'SJIS' is_sjis(str) else raise UnknownCharsetError.new("Unknown charset: #{code}") end end end end