A64L(3C)							      A64L(3C)

NAME    [Toc]    [Back]

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

SYNOPSIS    [Toc]    [Back]

     long a64l(char *s);

     char *l64a(long l);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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


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