a64l(3C)

NAME
     a64l, l64a - convert between long integer and base-64 ASCII string

SYNOPSIS
     long a64l(char *s);

     char *l64a(long l);

DESCRIPTION
     These functions are used to maintain numbers stored in base-64 ASCII
     characters.  This is a notation by which long integers can be represented
     by up to six characters; each character represents a ``digit'' in a
     radix-64 notation.

     The characters used to represent ``digits'' are . for 0, / for 1, 0
     through 9 for 2-11, A through Z for 12-37, and a through z for 38-63.

     a64l takes a pointer to a null-terminated base-64 representation and
     returns a corresponding long value.  If the string pointed to by s
     contains more than six characters, a64l will use the first six.

     a64l scans the character string from left to right, decoding each
     character as a 6 bit Radix 64 number.

     l64a takes a long argument and returns a pointer to the corresponding
     base-64 representation.  If the argument is 0, l64a returns a pointer to
     a null string.

CAVEAT
     The value returned by l64a is a pointer into a static buffer, the
     contents of which are overwritten by each call.