a64l, l64a - convert between long integer and base-64 ASCII
long a64l(const char *s);
char *l64a(long l);
These functions maintain numbers stored in base-64 ASCII
characters that define 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 as follows:
| Character | Digit |
| . | 0 |
| / | 1 |
| 0-9 | 2-11 |
| A-Z | 12-37 |
| a-z | 38-63 |
The a64l() function 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() uses the first six.
The a64l() function 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.
The l64a() function 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.
The value returned by l64a() is a pointer into a static
buffer, the contents of which are overwritten by each call.
In the case of multithreaded applications, the return value
is a pointer to thread specific data.
See attributes(5) for descriptions of the following attri-
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | MT-Safe |
Man(1) output converted with