From: nowhere@never.at   
      
   Terje Mathisen wrote:   
   ...   
   >>> My first ascii executable used both POP BX and Base91. :-)   
   >> was it much shorter then ?   
      
   > It didn't need the Base64 decoder, but handling 16-bytes to 13 isn't   
   > free either. This was more than 20 years ago so I don't remember the   
   > details, like what I did if the input wasn't a multiple of 13 bytes long?   
      
   > I believe I just encoded enough pairs (of 13 bits each) so that I   
   > covered the input, then the decoder could just grab whatever garbage   
   > happened to reside past the end.   
      
   > Something like this?   
   >   
   >   bits =-8; buffer = 0;   
   >   do {   
   >     pair = (*src++ - 33) + (*src++ - 33) * 91; // 0 to 4095   
   >     buffer = (buffer << 13) + pair;   
   >     bits += 13;   
   >     do {   
   >       *dst++ = buffer & 255;   
   >       buffer >>= 8;   
   >       bits -= 8;   
   >     } while (bits >= 0);   
   >   } while (src < src_end);   
   >   
   > with lots of opportunities for nice asm trickery to shorten it. :-)   
      
   Sorry for I have no idea what the above C-source may compile to.   
   __   
   wolfgang   
      
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