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# XSD4R - Charset handling library.
# Copyright (C) 2001, 2003 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
@encoding = $KCODE
class XSDError < StandardError; end
class CharsetError < XSDError; end
class UnknownCharsetError < CharsetError; end
class CharsetConversionError < CharsetError; end
public
###
## Maps
#
EncodingConvertMap = {}
def Charset.init
begin
require 'xsd/iconvcharset'
@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'
@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',
}
###
## handlers
#
def Charset.encoding
@encoding
end
def Charset.encoding=(encoding)
STDERR.puts("xsd charset is set to #{encoding}") if $DEBUG
@encoding = encoding
end
def Charset.encoding_label
charset_label(@encoding)
end
def Charset.encoding_to_xml(str, charset)
encoding_conv(str, @encoding, charset_str(charset))
end
def Charset.encoding_from_xml(str, charset)
encoding_conv(str, charset_str(charset), @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)
else
CharsetMap.index(label.downcase)
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 = $KCODE)
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
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