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-'\" t
-\t
-.\" Copyright 2002 walter harms (walter.harms@informatik.uni-oldenburg.de)
-.\"
-.\" SPDX-License-Identifier: GPL-1.0-or-later
-.\"
-.\" Corrected, aeb, 2002-05-30
-.\"
-.TH a64l 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-a64l, l64a \- convert between long and base-64
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <stdlib.h>
-.P
-.BI "long a64l(const char *" str64 );
-.BI "char *l64a(long " value );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR a64l (),
-.BR l64a ():
-.nf
- _XOPEN_SOURCE >= 500
-.\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
- || /* glibc >= 2.19: */ _DEFAULT_SOURCE
- || /* glibc <= 2.19: */ _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-These functions provide a conversion between 32-bit long integers
-and little-endian base-64 ASCII strings (of length zero to six).
-If the string used as argument for
-.BR a64l ()
-has length greater than six, only the first six bytes are used.
-If the type
-.I long
-has more than 32 bits, then
-.BR l64a ()
-uses only the low order 32 bits of
-.IR value ,
-and
-.BR a64l ()
-sign-extends its 32-bit result.
-.P
-The 64 digits in the base-64 system are:
-.P
-.RS
-.nf
-\&\[aq].\[aq] represents a 0
-\&\[aq]/\[aq] represents a 1
-0-9 represent 2-11
-A-Z represent 12-37
-a-z represent 38-63
-.fi
-.RE
-.P
-So 123 = 59*64\[ha]0 + 1*64\[ha]1 = "v/".
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR l64a ()
-T} Thread safety MT-Unsafe race:l64a
-T{
-.na
-.nh
-.BR a64l ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001.
-.SH NOTES
-The value returned by
-.BR l64a ()
-may be a pointer to a static buffer, possibly overwritten
-by later calls.
-.P
-The behavior of
-.BR l64a ()
-is undefined when
-.I value
-is negative.
-If
-.I value
-is zero, it returns an empty string.
-.P
-These functions are broken before glibc 2.2.5
-(puts most significant digit first).
-.P
-This is not the encoding used by
-.BR uuencode (1).
-.SH SEE ALSO
-.BR uuencode (1),
-.\" .BR itoa (3),
-.BR strtoul (3)