These functions provide a conversion between 32-bit long integers
and little-endian base-64 ASCII strings (of length zero to six).
If the string used as argument for
a64l() has length greater than six, only the first six bytes are used.
If the type
long has more than 32 bits, then
l64a() uses only the low order 32 bits of
value, and
a64l() sign-extends its 32-bit result.

The 64 digits in the base-64 system are:

. represents a 0
/ represents a 1
0-9 represent 2-11
A-Z represent 12-37
a-z represent 38-63

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A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.