\" $NetBSD: a64l.3,v 1.10 2010/05/06 18:55:34 jruoho Exp $
\"
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\" This code is derived from software contributed to The NetBSD Foundation
\" by Klaus Klein.
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Dd May 6, 2010
Dt A64L 3
Os
Sh NAME
Nm a64l ,
Nm l64a ,
Nm l64a_r
Nd "convert between a long integer and a base-64 ASCII string"
Sh LIBRARY
Lb libc
Sh SYNOPSIS
In stdlib.h
Ft long
Fn a64l "const char *s"
Ft char *
Fn l64a "long int l"
Ft int
Fn l64a_r "long int l" "char *buffer" "int buflen"
Sh DESCRIPTION
The
Fn a64l
and
Fn l64a
functions convert between a long integer and its base-64 ASCII string
representation.
Pp
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.
Pp
Fn a64l
takes a pointer to a NUL-terminated base-64 ASCII string
representation,
Fa s ,
and returns the corresponding long integer value.
Pp
Fn l64a
takes a long integer value,
Fa l ,
and returns a pointer to the corresponding NUL-terminated base-64
ASCII string representation.
Pp
Fn l64a_r
performs a conversion identical to that of
Fn l64a
and stores the resulting representation in the memory area pointed to by
Fa buffer ,
consuming at most
Fa buflen
characters including the terminating NUL character.
Sh RETURN VALUES
On successful completion,
Fn a64l
returns the long integer value corresponding to the input string.
If the string pointed to by
Fa s
is an empty string,
Fn a64l
returns a value of 0L.
Pp
Fn l64a
returns a pointer to the base-64 ASCII string representation corresponding to
the input value.
If
Fa l
is 0L,
Fn l64a
returns a pointer to an empty string.
Pp
On successful completion,
Fn l64a_r
returns 0; if
Fa buffer
is of insufficient length, -1 is returned.
Sh SEE ALSO
Xr strtol 3
Sh STANDARDS
The
Fn a64l
and
Fn l64a
functions conform to
St -xpg4.2
and
St -p1003.1-2004 .
The
Fn l64a_r
function conforms to
St -svid4 ,
Multithreading Extension.
Sh BUGS
The
Fn l64a
function is not reentrant.
The value returned by it points into a static buffer area;
subsequent calls to
Fn la64a
may overwrite this buffer.
In multi-threaded applications,
Fn l64a_r
should be used instead.

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