Manpage of A64L

A64L

Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME

1.2 `a64l',`l64a'--convert between radix-64 ascii string and long

SYNOPSIS

     #include <stdlib.h>
     long a64l(const char *INPUT);
     char *l64a(long INPUT);

DESCRIPTION

Conversion is performed between long and radix-64 characters. The `l64a' routine transforms up to 32-bits of input value starting from least significant bits to the most significant bits. The input value is split up into a maximum of 5 groups of 6-bits and possibly one group of 2 bits (bits 31 and 30).

Each group of 6 bits forms a value from 0-63 which is translated into a character as follows:

0 = '.' 1 = '/' 2-11 = '0' to '9' 12-37 = 'A' to 'Z' 38-63 = 'a' to

When remaining bits are zero or all bits have been translated, a nul terminator is appended to the string. An input value of 0 results in the empty string.

The `a64l' performs the reverse translation. Each character is used to generate a 6-bit value for up to 30 bits and then a 2-bit value to complete a 32-bit result. The nul terminator means that the remaining digits are 0. An empty input string or NULL string results in 0L. An invalid string results in undefined behavior. If the size of a long is > 32 bits, the result is sign-extended.

RETURNS

`l64a' returns a nul-terminated string of 0 to 6 characters. `a64l' returns the 32-bit translated value from the input character string.

PORTABILITY

`l64a' and `a64l' are non-ANSI and are defined by the Single Unix Specification.

Supporting OS subroutines required: None.

This document was created by man2html, using the manual pages.
Time: 21:25:11 GMT, May 16, 2005