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ISO-8859-15.rb

#
# This class was contributed by Mikko Tiihonen mikko DOT tiihonen AT hut DOT fi
#
module REXML
  module Encoding
  	register("ISO-8859-15") do |o|
  		alias encode to_iso_8859_15
      alias decode from_iso_8859_15
  	end

# Convert from UTF-8
    def to_iso_8859_15(content)
      array_utf8 = content.unpack('U*')
      array_enc = []
      array_utf8.each do |num|
        case num
          # shortcut first bunch basic characters
        when 0..0xA3; array_enc << num
          # characters removed compared to iso-8859-1
        when 0xA4; array_enc << '&#164;'
        when 0xA6; array_enc << '&#166;'
        when 0xA8; array_enc << '&#168;'
        when 0xB4; array_enc << '&#180;'
        when 0xB8; array_enc << '&#184;'
        when 0xBC; array_enc << '&#188;'
        when 0xBD; array_enc << '&#189;'
        when 0xBE; array_enc << '&#190;'
          # characters added compared to iso-8859-1
        when 0x20AC; array_enc << 0xA4 # 0xe2 0x82 0xac
        when 0x0160; array_enc << 0xA6 # 0xc5 0xa0
        when 0x0161; array_enc << 0xA8 # 0xc5 0xa1
        when 0x017D; array_enc << 0xB4 # 0xc5 0xbd
        when 0x017E; array_enc << 0xB8 # 0xc5 0xbe
        when 0x0152; array_enc << 0xBC # 0xc5 0x92
        when 0x0153; array_enc << 0xBD # 0xc5 0x93
        when 0x0178; array_enc << 0xBE # 0xc5 0xb8
        else
          # all remaining basic characters can be used directly
          if num <= 0xFF
            array_enc << num
          else
            # Numeric entity (&#nnnn;); shard by  Stefan Scholl
            array_enc.concat "&\##{num};".unpack('C*')
          end
        end
      end
      array_enc.pack('C*')
    end
    
    # Convert to UTF-8
    def from_iso_8859_15(str)
      array_latin9 = str.unpack('C*')
      array_enc = []
      array_latin9.each do |num|
        case num
          # characters that differ compared to iso-8859-1
        when 0xA4; array_enc << 0x20AC
        when 0xA6; array_enc << 0x0160
        when 0xA8; array_enc << 0x0161
        when 0xB4; array_enc << 0x017D
        when 0xB8; array_enc << 0x017E
        when 0xBC; array_enc << 0x0152
        when 0xBD; array_enc << 0x0153
        when 0xBE; array_enc << 0x0178
        else
          array_enc << num
        end
      end
      array_enc.pack('U*')
    end
  end
end

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