a64l(3) [netbsd man page]

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

NAME

     a64l, l64a, l64a_r -- convert between a long integer and a base-64 ASCII string

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     long
     a64l(const char *s);

     char *
     l64a(long int l);

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

DESCRIPTION

     The a64l() and l64a() functions convert between a long integer and its base-64 ASCII string representation.

     The characters used to represent ``digits'' are `.' for 0, `/' for 1, `0' - `9' for 2 - 11, `A' - `Z' for 12 - 37, and `a' - `z' for 38 - 63.

     a64l() takes a pointer to a NUL-terminated base-64 ASCII string representation, s, and returns the corresponding long integer value.

     l64a() takes a long integer value, l, and returns a pointer to the corresponding NUL-terminated base-64 ASCII string representation.

     l64a_r() performs a conversion identical to that of l64a() and stores the resulting representation in the memory area pointed to by buffer,
     consuming at most buflen characters including the terminating NUL character.

RETURN VALUES

     On successful completion, a64l() returns the long integer value corresponding to the input string.  If the string pointed to by s is an empty
     string, a64l() returns a value of 0L.

     l64a() returns a pointer to the base-64 ASCII string representation corresponding to the input value.  If l is 0L, l64a() returns a pointer
     to an empty string.

     On successful completion, l64a_r() returns 0; if buffer is of insufficient length, -1 is returned.

SEE ALSO

     strtol(3)

STANDARDS

     The a64l() and l64a() functions conform to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'') and IEEE Std 1003.1-2004 (``POSIX.1'').
     The l64a_r() function conforms to System V Interface Definition, Fourth Edition (``SVID4''), Multithreading Extension.

BUGS

     The l64a() function is not reentrant.  The value returned by it points into a static buffer area; subsequent calls to la64a() may overwrite
     this buffer.  In multi-threaded applications, l64a_r() should be used instead.

BSD
								    May 6, 2010 							       BSD

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

NAME

     a64l, l64a, l64a_r -- convert between a long integer and a base-64 ASCII string

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     long
     a64l(const char *s);

     char *
     l64a(long int l);

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

DESCRIPTION

     These functions are used to maintain numbers stored in radix-64 ASCII characters.	This is a notation by which 32-bit integers can be repre-
     sented by up to six characters; each character represents a digit in radix-64 notation.  If the type long contains more than 32 bits, only
     the low-order 32 bits are used for these operations.

     The characters used to represent ``digits'' are '.' for 0, '/' for 1, '0' - '9' for 2 - 11, 'A' - 'Z' for 12 - 37, and 'a' - 'z' for 38 - 63.

     The a64l() function takes a pointer to a radix-64 representation, in which the first digit is the least significant, and returns a corre-
     sponding long value.  If the string pointed to by s contains more than six characters, a64l() uses the first six.	If the first six charac-
     ters of the string contain a null terminator, a64l() uses only characters preceding the null terminator.  The a64l() function scans the char-
     acter string from left to right with the least significant digit on the left, decoding each character as a 6-bit radix-64 number.	If the
     type long contains more than 32 bits, the resulting value is sign-extended.  The behavior of a64l() is unspecified if s is a null pointer or
     the string pointed to by s was not generated by a previous call to l64a().

     The l64a() function takes a long argument and returns a pointer to the corresponding radix-64 representation.  The behavior of l64a() is
     unspecified if value is negative.

     The value returned by l64a() is a pointer into a static buffer.  Subsequent calls to l64a() may overwrite the buffer.

     The l64a_r() function performs a conversion identical to that of l64a() and stores the resulting representation in the memory area pointed to
     by buffer, consuming at most buflen characters including the terminating NUL character.

RETURN VALUES

     On successful completion, a64l() returns the long value resulting from conversion of the input string.  If a string pointed to by s is an
     empty string, a64l() returns 0.

     The l64a() function returns a pointer to the radix-64 representation.  If value is 0, l64a() returns a pointer to an empty string.

SEE ALSO

     strtoul(3)

HISTORY

     The a64l(), l64a(), and l64a_r() functions are derived from NetBSD with modifications.  They appeared in FreeBSD 6.1.

AUTHORS

     The a64l(), l64a(), and l64a_r() functions were added to FreeBSD by Tom Rhodes <trhodes@FreeBSD.org>.  Almost all of this manual page came
     from the POSIX standard.

BSD
								 November 20, 2005							       BSD