a64l(3C) LIBRARY FUNCTIONS a64l(3C)
NAME
a64l, l64a - convert between long integer and base-64 ASCII
string
SYNOPSIS
#include <stdlib.h>
long a64l (const char *s);
char *l64a (long l);
DESCRIPTION
These functions are used to maintain numbers stored in
base-64 ASCII characters. These characters define a nota-
tion 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 represen-
tation 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 with the
least significant digit on the left, 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.
NOTES
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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