functions.encoding.php

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<?php
/*
 You may not change or alter any portion of this comment or credits
 of supporting developers from this source code or any supporting source code
 which is considered copyrighted (c) material of the original comment or credit authors.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

defined('XOOPS_ROOT_PATH') or die('Restricted access');

function xoops_hex2bin($hex)
{
    if (!is_string($hex)) return null;
    $r = '';
    $len = strlen($hex);
    for ($a = 0; $a < $len; $a += 2) {
        $r .= chr(hexdec($hex{$a} . $hex{($a + 1)}));
    }
    return $r;
}

function xoops_bin2hex($bin)
{
    return bin2hex($bin);
}

function xoops_ishexstr($hex, $checklen = 32)
{
    $accepted = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
    $len = strlen($hex);
    if ($checklen > $len) {
        $checklen = $len;//And???
    }
    $hex = strtolower($hex);
    for ($i = 0; $i < $len; $i++) {
        if (!in_array($hex{$i}, $accepted)) {
            return false;
        }
    }
    return true;
}

function xoops_convert_encode($data, $store_method = "urlcode") {
    switch ($store_method) {
        default:
            return urlencode($data);
        case "base64":
            return base64_encode($data);
        case "uucode":
            return convert_uuencode($data);
        case "open":
            return $data;
        case "hex":
            return bin2hex($data);
    }
}

function xoops_convert_decode($data, $store_method = "urlcode") {
    switch ($store_method) {
        default:
            return urldecode($data);
        case "base64":
            return base64_decode($data);
        case "uucode":
            return convert_uudecode($data);
        case "open":
            return $data;
        case "hex":
            return xoops_hex2bin($data);
    }
}

function xoops_aw_encode($value, $key, $store_method = "urlcode") {
    $value = xoops_convert_encode($value, $store_method);
}

function xoops_aw_decode($value, $key, $store_method = "urlcode") {
    $value = xoops_convert_decode($value, $store_method);
}

?>