A64L(3) 						   BSD Library Functions Manual 						   A64L(3)

NAME

     a64l, l64a -- convert between 32-bit integer and radix-64 ASCII string

SYNOPSIS

     #include <stdlib.h>

     long
     a64l(const char *s);

     char *
     l64a(long value);

DESCRIPTION

     The a64l() and l64a() functions are used to maintain numbers stored in radix-64 ASCII characters.	This is a notation by which 32-bit inte-
     gers 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 a64l() function takes a pointer to a null-terminated radix-64 representation and returns a corresponding 32-bit 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.  If a long integer is larger than 32 bits, the return value will be sign-extended.

     l64a() takes a long integer argument value and returns a pointer to the corresponding radix-64 representation.

RETURN VALUES

     On success, a64l() returns a 32-bit representation of s.  If s is a null pointer or if it contains digits other than those described above.
     a64l() returns -1 and sets the global variable errno to EINVAL.

     On success, l64a() returns a pointer to a string containing the radix-64 representation of value.	If value is 0, l64a() returns a pointer to
     the empty string.	If value is negative, l64a() returns a null pointer and sets the global variable errno to EINVAL.

WARNINGS

     The value returned by l64a() is a pointer into a static buffer, the contents of which will be overwritten by subsequent calls.

     The value returned by a64l() may be incorrect if the value is too large; for that reason, only strings that resulted from a call to l64a()
     should be used to call a64l().

     If a long integer is larger than 32 bits, only the low-order 32 bits are used.

STANDARDS

     The a64l() and l64a() functions conform to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').

BSD
								  August 17, 1997							       BSD