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HP-UX 11i Version 3: February 2007

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


#include <stdlib.h>

long int a64l(const char *s);

char *l64a(long int l);

Obsolescent Interface

int l64a_r(long int l, char *buffer, int buflen);


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.

The leftmost character is the least significant digit. For example,

a0 = (38 x 640) + (2 x 641) = 166

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() uses 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.

Obsolescent Interface

l64a_r() converts between long integer and base-64 ASCII string.


The value returned by l64a() is a pointer into a buffer, the contents of which are overwritten subsequent calls by the same thread.

l64a_r() is an obsolescent interface supported only for compatibility with existing DCE applications. New multithreaded applications should use l64a().


a64l(): SVID2, SVID3 l64a(): SVID2, SVID3

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