Module: Codec::EightBitsEncoding

Defined in:
lib/codec/eight_bits_encoding.rb

Constant Summary collapse

ASCII_EBCDIC = 
["
00010203372D2E2F1605250B0C0D0E0F101112133C3D322618193F271C1D1E1F
405A7F7B5B6C507D4D5D5C4E6B604B61F0F1F2F3F4F5F6F7F8F97A5E4C7E6E6F
7CC1C2C3C4C5C6C7C8C9D1D2D3D4D5D6D7D8D9E2E3E4E5E6E7E8E94AE05A5F6D
79818283848586878889919293949596979899A2A3A4A5A6A7A8A9C06AD0A107
C3E4858181818183858585898989C1C1C50707969696A4A4A8D6E40707070707
818996A495D5810707070707070707070707070707C1C1C10707070707070707
07070707070781C10707070707070707070707070789C9C9C907070707070707
D607D6D696D6070707E4E4E4A8E8070707070707070707070707070707070707
".gsub(/[^0-9a-fA-F]/i,'')].pack("H*")
EBCDIC_ASCII = 
["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".gsub(/[^0-9a-fA-F]/i,'')].pack("H*")
ASCII_EXTENTION = 
(128..175).to_a + (224..255).to_a + 
["B5B6B7B8BDBEC6C7CFD0D1D2D3D4D5D6D7D8DE"].pack("H*").bytes.to_a
UTF_8_EXTENTION = 
["ÇÜéâäàåçêëèïîìÄÅÉæÆôöòûùÿÖÜø£Ø׃áíóúñѪº¿®¬½¼¡«»",
"ÓßÔÒõÕμþÞÚÛÙýݯ´-±_¾¶§÷¸°¨·¹³²_.", "ÁÂÀ©¢¥ãäðÐÊËÈiÍÎÏÌ"].join.chars.to_a
EXT_ASC_TO_UTF8 = 

      
        
EXT_UTF8_TO_ASC =
          
        

        

      
    

  







  
    

      Class Method Summary
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Class Method Details


    
      

  

  
    .ASCII_2_UTF8(buf)  ⇒ Object 
  

  

  




  

    
      


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# File 'lib/codec/eight_bits_encoding.rb', line 45

def self.ASCII_2_UTF8(buf)
  buf.bytes.collect { |b| 
    if b < 128
      b.chr
    elsif EXT_ASC_TO_UTF8[b].nil?
      127.chr # using ascii padding character
    else
      EXT_ASC_TO_UTF8[b]
    end
  }.join
end

    		
  





    
      

  

  
    .EBCDIC_2_UTF8(buf)  ⇒ Object 
  

  

  




  

    
      


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# File 'lib/codec/eight_bits_encoding.rb', line 57

def self.EBCDIC_2_UTF8(buf)
  ASCII_2_UTF8(buf.bytes.collect { |b| EBCDIC_ASCII.getbyte(b).chr }.join)
end

    		
  





    
      

  

  
    .UTF8_2_ASCII(buf)  ⇒ Object 
  

  

  




  

    
      


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# File 'lib/codec/eight_bits_encoding.rb', line 33

def self.UTF8_2_ASCII(buf)
  buf.chars.collect { |c| 
    if c.getbyte(0) < 128
      c
    elsif EXT_UTF8_TO_ASC[c].nil?
      127.chr
    else
      EXT_UTF8_TO_ASC[c].chr
    end
  }.join 
end

    		
  





    
      

  

  
    .UTF8_2_EBCDIC(buf)  ⇒ Object 
  

  

  




  

    
      


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# File 'lib/codec/eight_bits_encoding.rb', line 61

def self.UTF8_2_EBCDIC(buf)
  UTF8_2_ASCII(buf).bytes.collect { |b| ASCII_EBCDIC.getbyte(b).chr }.join
end