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Manual page for A64L(3)

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

SYNOPSIS

long a64l(s)
char *s;

char *l64a(l) 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.

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.

BUGS

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