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NetBSD 6.1.5 - man page for a64l (netbsd section 3)

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-termi-
     nated base-64 ASCII string representation.

     l64a_r() performs a conversion identical to that of l64a() and stores the resulting repre-
     sentation 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 applica-
     tions, l64a_r() should be used instead.

BSD					   May 6, 2010					      BSD


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