a64l - phpMan

A64L(3)                    Linux Programmer’s Manual                   A64L(3)



NAME
       a64l, l64a - convert between long and base-64

SYNOPSIS
       #include <stdlib.h>

       long a64l(char *str64);

       char *l64a(long value);


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
       a64l()  has  length  greater than six, only the first six bytes are used.  If longs
       have more than 32 bits, then l64a() uses only the low order 32 bits of  value,  and
       a64l() sign-extends its 32-bit result.

       The 64 digits in the base 64 system are:
              ’.’  represents a 0
              ’/’  represents a 1
              0-9  represent  2-11
              A-Z  represent 12-37
              a-z  represent 38-63
       So 123 = 59*64^0 + 1*64^1 = "v/".

NOTES
       The  value  returned  by a64l() may be a pointer to a static buffer, possibly over-
       written by later calls.

       The behaviour of l64a() is undefined when value is negative. If value is  zero,  it
       returns an empty string.

       These  functions  are  broken  in  glibc  before 2.2.5 (puts most significant digit
       first).

       This is not the encoding used by uuencode(1).

CONFORMING TO
       XPG 4.2, POSIX 1003.1-2001.

SEE ALSO
       uuencode(1), itoa(3), strtoul(3)



                                  2002-02-15                           A64L(3)

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