Module: XSD::Charset

Defined in:
lib/xsd/charset.rb

Defined Under Namespace

Classes: CharsetConversionError, CharsetError, UnknownCharsetError, XSDError

Constant Summary collapse

EncodingConvertMap =

Maps

{}
CharsetMap =
{
  'NONE' => 'us-ascii',
  'EUC' => 'euc-jp',
  'SJIS' => 'shift_jis',
  'UTF8' => 'utf-8',
  'X_ISO_8859_1' => 'iso-8859-1',
  'X_UNKNOWN' => nil,
}
CharsetStrCache =
{}
USASCIIRegexp =

XML 1.0 restricted.

Regexp.new("\\A#{us_ascii}*\\z", nil, 'NONE')
EUCRegexp =
Regexp.new("\\A#{character_euc}*\\z", nil, 'NONE')
SJISRegexp =
Regexp.new("\\A#{character_sjis}*\\z", nil, 'NONE')
UTF8Regexp =
Regexp.new("\\A#{character_utf8}*\\z", nil, 'NONE')

Class Method Summary collapse

Class Method Details

.charset_label(encoding) ⇒ Object


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# File 'lib/xsd/charset.rb', line 118

def Charset.charset_label(encoding)
  CharsetMap[encoding.upcase]
end

.charset_str(label) ⇒ Object


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# File 'lib/xsd/charset.rb', line 122

def Charset.charset_str(label)
  if CharsetMap.respond_to?(:key)
    CharsetStrCache[label] ||= CharsetMap.key(label.downcase) || 'X_UNKNOWN'
  else
    CharsetStrCache[label] ||= CharsetMap.index(label.downcase) || 'X_UNKNOWN'
  end
end

.encodingObject

handlers


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# File 'lib/xsd/charset.rb', line 86

def Charset.encoding
  @internal_encoding
end

.encoding=(encoding) ⇒ Object


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# File 'lib/xsd/charset.rb', line 90

def Charset.encoding=(encoding)
  warn("xsd charset is set to #{encoding}") if $DEBUG
  @internal_encoding = encoding
end

.encoding_conv(str, enc_from, enc_to) ⇒ Object


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# File 'lib/xsd/charset.rb', line 107

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

.encoding_from_xml(str, charset) ⇒ Object


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# File 'lib/xsd/charset.rb', line 103

def Charset.encoding_from_xml(str, charset)
  encoding_conv(str, charset_str(charset), @internal_encoding)
end

.encoding_to_xml(str, charset) ⇒ Object


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# File 'lib/xsd/charset.rb', line 99

def Charset.encoding_to_xml(str, charset)
  encoding_conv(str, @internal_encoding, charset_str(charset))
end

.initObject


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# File 'lib/xsd/charset.rb', line 26

def Charset.init
  EncodingConvertMap[['UTF8', 'X_ISO_8859_1']] =
    Proc.new { |str| str.unpack('U*').pack('C*') }
  EncodingConvertMap[['X_ISO_8859_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

.is_ces(str, code = @internal_encoding) ⇒ Object


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# File 'lib/xsd/charset.rb', line 172

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

.is_euc(str) ⇒ Object


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# File 'lib/xsd/charset.rb', line 164

def Charset.is_euc(str)
  EUCRegexp =~ str
end

.is_sjis(str) ⇒ Object


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# File 'lib/xsd/charset.rb', line 168

def Charset.is_sjis(str)
  SJISRegexp =~ str
end

.is_us_ascii(str) ⇒ Object


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# File 'lib/xsd/charset.rb', line 156

def Charset.is_us_ascii(str)
  USASCIIRegexp =~ str
end

.is_utf8(str) ⇒ Object


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# File 'lib/xsd/charset.rb', line 160

def Charset.is_utf8(str)
  UTF8Regexp =~ str
end

.xml_encoding_labelObject


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# File 'lib/xsd/charset.rb', line 95

def Charset.xml_encoding_label
  charset_label(@internal_encoding)
end