liby64 Files

This library provides translation of arrays of byte values to the y64 format. 

Y64 is a variant of Base64 encoding designed to be URL safe. It was developed 
and used at Yahoo. For more information, see 
http://en.wikipedia.org/wiki/Base64 and 
http://www.yuiblog.com/blog/2010/07/06/in-the-yui-3-gallery-base64-and-y64-encod
ing/ 

Much of the code came directly from libb64 
(https://sourceforge.net/projects/libb64/).

To install:

./configure
make
(optionally) make check
make install

Q: How many bytes should one alloc to store an n-byte block using this library?
A: Generally, since Y64 is fundamentally converting digits stored as 8 bits to
    digits stored in 6 bits, it requires 4 bytes to encode 3 bytes as Y64.
    
    Use the following formula:
      bytes_to_malloc = ( n % 3 ) ? ( ( n / 3 ) * 4 ) + ( n % 3 ) + 1 : ( n / 3 ) * 4 ;