RandomTest.php

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<?php
# Copyright (C) 2004 Brion Vibber <brion@pobox.com>
# http://www.mediawiki.org/
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# http://www.gnu.org/copyleft/gpl.html

if (php_sapi_name() != 'cli') {
    die("Run me from the command line please.\n");
}

require_once('include/Unicode/UtfNormal.php');
require_once('../DifferenceEngine.php');

dl('php_utfnormal.so');

# mt_srand( 99999 );

function randomString($length, $nullOk, $ascii = false)
{
    $out = '';
    for ($i = 0; $i < $length; $i++) {
        $out .= chr(mt_rand($nullOk ? 0 : 1, $ascii ? 127 : 255));
    }
    return $out;
}

/* Duplicate of the cleanUp() path for ICU usage */
function donorm($str)
{
    # We exclude a few chars that ICU would not.
    $str = preg_replace('/[\x00-\x08\x0b\x0c\x0e-\x1f]/', UTF8_REPLACEMENT, $str);
    $str = str_replace(UTF8_FFFE, UTF8_REPLACEMENT, $str);
    $str = str_replace(UTF8_FFFF, UTF8_REPLACEMENT, $str);

    # UnicodeString constructor fails if the string ends with a head byte.
    # Add a junk char at the end, we'll strip it off
    return rtrim(utf8_normalize($str . "\x01", UNORM_NFC), "\x01");
}

function wfMsg($x)
{
    return $x;
}

function showDiffs($a, $b)
{
    $ota = explode("\n", str_replace("\r\n", "\n", $a));
    $nta = explode("\n", str_replace("\r\n", "\n", $b));

    $diffs = new Diff($ota, $nta);
    $formatter = new TableDiffFormatter();
    $funky = $formatter->format($diffs);
    $matches = array();
    preg_match_all('/<(?:ins|del) class="diffchange">(.*?)<\/(?:ins|del)>/', $funky, $matches);
    foreach ($matches[1] as $bit) {
        $hex = bin2hex($bit);
        echo "\t$hex\n";
    }
}

$size = 16;
$n = 0;
while (true) {
    $n++;
    echo "$n\n";

    $str = randomString($size, true);
    $clean = UtfNormal::cleanUp($str);
    $norm = donorm($str);

    echo strlen($clean) . ", " . strlen($norm);
    if ($clean == $norm) {
        echo " (match)\n";
    } else {
        echo " (FAIL)\n";
        echo "\traw: " . bin2hex($str) . "\n" .
             "\tphp: " . bin2hex($clean) . "\n" .
             "\ticu: " . bin2hex($norm) . "\n";
        echo "\n\tdiffs:\n";
        showDiffs($clean, $norm);
        die();
    }


    $str = '';
    $clean = '';
    $norm = '';
}