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#!/usr/bin/php
<?php
chdir(dirname(__FILE__));
require_once 'common.php';
assertCli();
/**
* @file
* Parses *.ent files into an entity lookup table, and then serializes and
* writes the whole kaboodle to a file. The resulting file is cached so
* that this script does not need to be run. This script should rarely,
* if ever, be run, since HTML's entities are fairly immutable.
*/
// here's where the entity files are located, assuming working directory
// is the same as the location of this PHP file. Needs trailing slash.
$entity_dir = '../docs/entities/';
// defines the output file for the serialized content.
$output_file = '../library/HTMLPurifier/EntityLookup/entities.ser';
// courtesy of a PHP manual comment
function unichr($dec)
{
if ($dec < 128) {
$utf = chr($dec);
} elseif ($dec < 2048) {
$utf = chr(192 + (($dec - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
} else {
$utf = chr(224 + (($dec - ($dec % 4096)) / 4096));
$utf .= chr(128 + ((($dec % 4096) - ($dec % 64)) / 64));
$utf .= chr(128 + ($dec % 64));
}
return $utf;
}
if ( !is_dir($entity_dir) ) exit("Fatal Error: Can't find entity directory.\n");
if ( file_exists($output_file) ) exit("Fatal Error: output file already exists.\n");
$dh = @opendir($entity_dir);
if ( !$dh ) exit("Fatal Error: Cannot read entity directory.\n");
$entity_files = array();
while (($file = readdir($dh)) !== false) {
if (@$file[0] === '.') continue;
if (substr(strrchr($file, "."), 1) !== 'ent') continue;
$entity_files[] = $file;
}
closedir($dh);
if ( !$entity_files ) exit("Fatal Error: No entity files to parse.\n");
$entity_table = array();
$regexp = '/<!ENTITY\s+([A-Za-z0-9]+)\s+"&#(?:38;#)?([0-9]+);">/';
foreach ( $entity_files as $file ) {
$contents = file_get_contents($entity_dir . $file);
$matches = array();
preg_match_all($regexp, $contents, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
$entity_table[$match[1]] = unichr($match[2]);
}
}
$output = serialize($entity_table);
$fh = fopen($output_file, 'w');
fwrite($fh, $output);
fclose($fh);
echo "Completed successfully.";
// vim: et sw=4 sts=4